If the temperature is constant, what change in volume would cause the pressure of an enclosed gas to be reduced to one quarter of its original value?

Answers

Answer 1

Answer:

Explanation:

From ideal gas equation PV=nRT

n is the number of moles, R is the gas constant = 0.0821 atm•L/mol•K

Since temperature is constant, P1V1=P2V2

P1V1=P1/4*V2

V2=4V1

Volume of the gas must be increased 4 times


Related Questions

A car is speeding down the freeway. The car’s tires have an angular velocity of 50 rad/s. As the car accelerates, the wheels have an angular acceleration of 0.8 rad/s^2. What is the final angular velocity of the wheels after the car has accelerated for 10 seconds?

Answers

The final angular velocity of the wheels after the car has accelerated for 10 seconds is 58 rad/s.

What is velocity?

Velocity is the speed of an object in a given direction. It is a vector quantity, which means that it has both a magnitude and a direction. The magnitude of velocity is equal to the rate of change of an object’s position. Velocity is usually measured in metres per second (m/s). In physics, velocity is usually expressed in terms of the direction of motion, such as towards the east, or away from the west. When an object’s velocity is constant, its motion is said to be uniform motion. When an object’s velocity changes, its motion is said to be non-uniform motion.

This is calculated by using the equation for angular velocity, which is ω = ω_0 + αt, where ω_0 is the initial angular velocity, α is the angular acceleration, and t is the time. In this case, ω_0 = 50 rad/s, α = 0.8 rad/s^2, and t = 10 s, so ω = 50 + (0.8)(10) = 58 rad/s.

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what is the term for the flow of air in a north and south direction, which is caused by a difference in solar energy between the poles and the equator

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The term for the flow of air in a north and south direction, caused by a difference in solar energy between the poles and the equator, is called the "Hadley cell circulation" or simply the "Hadley circulation."

What is Hadley circulation?

The Hadley circulation is a large-scale atmospheric circulation pattern that occurs in the tropics.

It is driven by the unequal heating of the Earth's surface by the Sun, which creates a temperature gradient between the equator and the poles. Warm air near the equator rises, creating a low-pressure area, and then flows poleward at high altitudes.

As the air moves away from the equator, it cools and sinks back down to the surface near the subtropical regions, creating high-pressure areas. The air then returns to the equator at the surface, completing the circulation loop.

This north-south flow of air in the Hadley circulation helps to distribute heat and moisture from the tropics toward higher latitudes, playing a significant role in shaping global weather patterns. It influences the formation of trade winds, tropical rainforests, and desert regions.

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How much work is required to move an electron

through a potential difference of 3. 00 volts?

(1) 5. 33 × 10^–20 J (3) 3. 00 J

(2) 4. 80 × 10^–19 J (4) 1. 88 × 10^19 J

Answers

The amount of work required to move an electron through a potential difference of 3.00 volts is 4.80 × 10⁻¹⁹ J.

The amount of needed work (energy) to move an electron through a potential difference can be calculated using the formula W = qV, where W is the work, q is the charge, and V is the potential difference. The charge of an electron is 1.60 × 10⁻¹⁹ C, so the work can be calculated as follows:

W = (1.60 × 10⁻¹⁹ C)(3.00 V)

W = 4.80 × 10⁻¹⁹ J

Therefore, the correct answer is option 2, 4.80 × 10⁻¹⁹ J.

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Imagine that you are walking outside at night carrying a flashlight. As the path you are on dips Into a foggy area, you can suddenly see the flashlight beam in front of you. What Is the name of this effect and what causes It?

Answers

The property is called the rectilinear propagation of light

What is the rectilinear propagation of light?

The rectilinear propagation of light refers to the fact that light travels in straight lines in a uniform medium, such as air or vacuum. This means that if a beam of light is not obstructed or refracted by a medium, it will continue to travel in a straight line.

This property of light was first described by the ancient Greeks, and it is a fundamental principle of geometric optics. The rectilinear propagation of light allows us to use simple geometrical methods, such as ray tracing, to predict how light will behave when it interacts with lenses, mirrors, and other optical devices.

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What is the average force of gravitation between Neptune and the Sun?

Answers

The average distance between sun and Neptune is 4.5 × 10¹² km and using the mass of both, the gravitational force between sun and Neptune is 6.44 × 10²⁰ N.

What is gravitational force ?

The gravitational force is a force by which an object attracts other objects its center of mass. The force exerted is related to the mass and distance between them as:

F = G m1 m2/ r²

where G = 6.67 ×10⁻¹¹ N km²/Kg²

The mass of sun = 1.9 × 10³⁰ kg

mass of Neptune = 1.03 × 10²⁶ kg.

distance between sun and Neptune = 4.5 × 10¹² km

Then, gravitational force between sun and Neptune is calculated as:

F = 6.67 ×10⁻¹¹ N km²/Kg² × 1.9 × 10³⁰ kg × 1.03 × 10²⁶ kg/ (4.5 × 10¹² km)²

  =  6.44 × 10²⁰ N.

Therefore, the gravitational force between sun and Neptune is

6.44 × 10²⁰ N.

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A plane accelerates from rest at a constant rate of 5.00ms2along a runway that is 1800mlong. Assume that the plane reaches the required takeoff velocity at the end of the runway. What is the time tTOneeded to take off?

Answers

The time plane needs to take off is 12 sec if the plane accelerates from rest at a constant rate of 5.00ms² along a runway that is 1800m long.

We can use the kinematic equation that relates the final velocity, initial velocity, acceleration, and time to solve this problem:

[tex]v_f[/tex] = [tex]v_i[/tex] + at

where:

[tex]v_f[/tex] = final velocity of the plane (takeoff velocity)

[tex]v_i[/tex] = initial velocity of the plane (0 m/s)

a = acceleration of the plane (5.00 m/s²)

t = time needed to take off

We also know that the plane takes off when it reaches the end of the runway, so we can use another kinematic equation that relates the distance, initial velocity, acceleration, and time:

d = [tex]v_i[/tex]t + 0.5a × t²

where:

d = distance traveled by plane (1800 m)

We can solve the first equation for t:

t = ([tex]v_f[/tex] - [tex]v_i[/tex]) / a

Since the initial velocity is 0 m/s, this simplifies to:

t = [tex]v_f[/tex] / a

Substituting this expression for t into the second equation, we get:

d = 0.5a([tex]v_f[/tex]/a)²

Simplifying this expression:

d = 0.5 × [tex]v_f[/tex]² / a

Multiplying both sides by 2/a:

d × 2/a = [tex]v_f[/tex]² / a

Taking the square root of both sides:

[tex]v_f[/tex] = √(2ad)

Now we can substitute the values we know and solve for [tex]v_f[/tex]:

[tex]v_f[/tex] = √(2 × 5.00 m/s² × 1800 m) = 60.0 m/s

Finally, we can use the first kinematic equation to solve for t:

t = [tex]v_f[/tex] / a = 60.0 m/s / 5.00 m/s² = 12.0 s

Therefore, it will take the plane 12.0 seconds to take off.

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What instrument is used to measure relative humidity?
a. an anemometer
b. a barometer
c. a wind vane
d. a psychrometer

Answers

The correct answer is (e) Hygrometer. A hygrometer is an instrument for measuring the relative humidity of the atmosphere. The hygrometer was invented by Leonardo da Vinci.

Hygometer:

A hygrometer is an instrument that measures the humidity of air or another gas: that is, the amount of water vapor it contains. Instruments for measuring humidity usually rely on measuring some other quantity, such as temperature, pressure, mass, mechanical or electrical changes of a substance as it absorbs moisture . Through calibration and calculation, these measurements can lead to humidity measurements. Modern electronics use condensing temperature (called dew point) or detect changes in capacitance or resistance to measure humidity differences. In 1480, Leonardo da Vinci invented a crude hygrometer.

The 1600s saw a huge leap forward; Francesco Folli invented a more practical device, while Robert Hooke improved many meteorological devices, including the hygrometer. In 1755 the Swiss polymath Johann Heinrich Lambert created a more modern version. Then, in 1783, Swiss physicist and geologist Horace Bénédict de Saussure invented the first hygrometer to measure humidity using human hair.

The maximum amount of water vapor (saturation) that can be held in a given volume of air varies greatly with temperature; cold air can hold less water per unit volume than warm air. Temperature can change humidity.

Complete Question:

What instrument is used to measure relative humidity?

a. an anemometer

b. a barometer

c. a wind vane

d. a psychrometer

e. a Hygrometer.

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I use a bucket on the end of a rope to raise/lower objects into/from my treehouse. Rather than risk throwing it, I put my Mom's phone in the bottom of the bucket and lower it down. The phone has a mass of 0.18kg . Just after I start to lower the bucket and phone, the acceleration of these objects is 1.1m/s2 in the downwards direction.
What is the magnitude of the normal force exerted by the bottom of the bucket on the phone?

Answers

The magnitude of the normal force exerted by the bottom of the bucket on the phone is approximately 1.9404 N.

The normal force exerted by the bottom of the bucket on the phone is equal in magnitude but opposite in direction to the weight of the phone. We can find the weight of the phone using the formula:

weight = mass x gravitational acceleration

where the mass of the phone is 0.18 kg and the gravitational acceleration is approximately 9.8 m/s^2.

weight = 0.18 kg x 9.8 m/s^2

weight = 1.764 N

Since the bucket and phone are accelerating downward with an acceleration of 1.1 m/s^2, the net force acting on them must be:

net force = mass x acceleration

where the mass is the combined mass of the bucket and phone. We can calculate the net force as follows:

net force = (mass of bucket + mass of phone) x acceleration

net force = (m + 0.18 kg) x 1.1 m/s^2

We don't know the mass of the bucket, but we can assume it is much greater than the mass of the phone, so we can neglect the 0.18 kg term. Then we get:

net force ≈ m x 1.1 m/s^2

The normal force exerted by the bottom of the bucket on the phone is equal in magnitude but opposite in direction to the net force acting on the phone. Therefore, we can say:

normal force = net force = m x 1.1 m/s^2

Substituting the weight of the phone for m, we get:

normal force = 1.764 N x 1.1

normal force = 1.9404 N

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when charged particles move through a conductor such as copper wire, what moves?

Answers

When charged particles move through a conductor such as copper wire, the electric charge moves. Specifically, the negatively charged electrons in the wire move in response to the electric field produced by the battery or other source of electrical energy.

As the electrons move, they collide with other atoms and transfer energy, causing a flow of charge through the wire. This flow of charge is called an electric current and is measured in amperes (A). In a direct current (DC) circuit, the electrons flow in one direction, while in an alternating current (AC) circuit, the electrons change direction periodically, producing a fluctuating current.

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miguel is investigating a fire that took place a few days ago. miguel wants to collect evidence from any accelerants. how long does it usually take for petroleum-based accelerants to evaporate? a) several days. b) several weeks. c) several hours

Answers

Option A) is correct. It can take several hours to several days for petroleum-based accelerant to fully evaporate from a surface.

The rate at which a petroleum-based accelerant evaporates can depend on a variety of factors such as the temperature, humidity, wind, and the type of accelerant used. Generally, it can take several hours to several days for petroleum-based accelerants to fully evaporate from a surface.

In a fire investigation, it is important to collect samples of any accelerants as soon as possible to avoid the risk of the accelerants evaporating and leaving no trace. If the accelerant is not collected within the appropriate time frame, it could potentially compromise the investigation.

Miguel should be aware of the environmental conditions and any factors that may influence the evaporation rate of the accelerant. He should take care to collect evidence in a timely manner and follow proper protocols to preserve any potential evidence. It is also recommended that Miguel consult with experts in the field to determine the best course of action in collecting and analyzing evidence related to the fire.

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Answer: A

Explanation:

ratio of vapor pressure relative to vapor capacity (True or False)

Answers

Answer:

True. The ratio of vapor pressure relative to vapor capacity is an important measure in determining the equilibrium moisture content of a material.

a parallel plate capacitor is connected to a 10 v battery. the area of the parallel plate is 6 m^2 and separation distance is 1.5 mm. find the capacitance.

Answers

The capacitance of the parallel plate capacitor is calculated as 35.4 nF.

What is capacitor?

Capacitor is a device for storing electrical energy and consisting of two conductors in close proximity and insulated from each other.

Capacitance of a parallel plate capacitor : C = ε₀A/d

ε₀ is permittivity of free space, A is area of the plates, and d is distance between them.

Given A = 6 m², d = 1.5 mm = 0.0015 m

V = 10 V

value of ε₀ is approximately 8.85 x 10⁻¹² F/m (farads per meter).

Using the formula for capacitance:

C = ε₀A/d = (8.85 x 10⁻¹² F/m)(6 m²)/(0.0015 m) = 35.4 x 10⁻⁹ F

Therefore, the capacitance of the parallel plate capacitor is 35.4 nF.

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how to find formula mass and molar mass

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Formula mass is found by summing the atomic masses of all the atoms in a chemical formula, while molar mass is the mass of one mole of a substance expressed in grams per mole.

Formula mass and molar mass are both measures of the mass of a substance. The formula mass is the sum of the atomic masses of all the atoms in a chemical formula, including any coefficients used to balance the formula. On the other hand, the molar mass is the mass of one mole of a substance and is equal to the formula mass expressed in grams per mole (g/mol).

To find the formula mass or molar mass, you need to look up the atomic masses of the elements in the chemical formula on the periodic table, multiply them by the number of atoms of each element in the formula, and then sum the results. The resulting number is the formula mass or molar mass.

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what is 40 degrees celsius in fahrenheit

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40 degrees Celsius equals 104 degrees Fahrenheit. We use the formula:  F = (C x 1.8) + 32

40 degrees Celsius equals 104 degrees Fahrenheit. The Fahrenheit and Celsius scales are two common temperature measurement systems used around the world. The Celsius scale is based on the freezing and boiling points of water, where 0 degrees Celsius is the freezing point and 100 degrees Celsius is the boiling point at standard atmospheric pressure. In contrast, the Fahrenheit scale is based on a system where 32 degrees Fahrenheit is the freezing point and 212 degrees Fahrenheit is the boiling point of water at standard atmospheric pressure.

To convert Celsius to Fahrenheit, you can use the formula:

F = (C x 1.8) + 32

Therefore, 40 degrees Celsius multiplied by 1.8 and then adding 32 equals 104 degrees Fahrenheit

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What is equation for power ?

Answers

Answer:

Explanation:

Power is defined as the rate at which work is done

Power = work/time and is measured in Watts

in the absence of an external force, a moving object will

Answers

In the absence of an external force, a moving object will continue to move in a straight line with a constant speed, according to Newton's first law of motion.

What is force?

In physics, force is defined as an influence that causes an object to undergo a change in motion, either by accelerating, decelerating, or changing direction. Force can be described as a push or a pull on an object, and it is typically measured in units of newtons (N) in the International System of Units (SI). Some common examples of forces include gravity, friction, electromagnetic force, and the force applied by a person or machine. The laws of motion developed by Isaac Newton provide a mathematical framework for understanding how forces affect the motion of objects.

Here,

This means that an object in motion will maintain its state of motion unless acted upon by an unbalanced force. Therefore, in the absence of an external force, the object will not change its velocity, which includes both speed and direction. This principle is applicable to both stationary and moving objects, and is a fundamental concept in classical mechanics.

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if 309 j of heat are removed from 10.0 g of ice (specific heat = 2.06 kg ºc) at -5.5 ºc, what is the final temperature of the ice sample?

Answers

The final temperature of the ice sample remains at -5.5 ºC since the heat transferred is used for melting the ice.

In this issue, we are given how much intensity eliminated (309 J) from an example of ice with a mass of 10.0 g and a particular intensity limit of 2.06 kJ/kgºC. The underlying temperature of the ice is - 5.5 ºC, and we are approached to find the last temperature of the ice test.

To tackle this issue, we can utilize the equation Q = mCΔT, where Q is how much intensity moved, m is the mass of the substance, C is the particular intensity limit, and ΔT is the adjustment of temperature.

Since the ice is at its softening mark of 0 ºC, the intensity moved is utilized to liquefy the ice, as opposed to expand its temperature. In this way, we can utilize the recipe Q = mL, where L is the idle intensity of combination of ice (334 J/g).

Utilizing this equation, we can find that how much ice dissolved is 309 J/334 J/g = 0.925 g. This leaves 10.0 g - 0.925 g = 9.075 g of ice.

Since the ice didn't change temperature during this cycle, its last temperature is still - 5.5 ºC.

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what is the region of concentrated magnetism at the end of a magnet?

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The region of concentrated magnetism at the end of a magnet is called a magnetic pole.

Magnets have two ends, called poles, which are labeled north (N) and south (S). The magnetic field lines of a magnet flow from the north pole to the south pole, creating a magnetic field that can attract or repel other magnets or magnetic materials.

At the ends of the magnet, the magnetic field lines are concentrated and the magnetic force is strongest, creating the magnetic poles. Unlike electric charges, magnetic poles always come in pairs, meaning that every north pole of a magnet is always paired with a south pole. The strength of a magnet's magnetic field depends on the size and strength of its poles.

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what are the 4 terms used to describe thermal properties of a material?

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Thermal conductivity (k), mass density (), specific heat (Cp), and, for materials that may undergo thermal degradation (such as pyrolysis), the heat of gasification (Lg) and ignition temperature, are among the thermal parameters that are relevant to fire behavior (Tig).

Infrared mass. A crucial element in the dynamic heat transfer interactions within a building is thermal mass, which is a material's resistance to temperature change as heat is added or removed. The four elements that need to be comprehended are thermal lag, specific heat, density, and thermal capacity. Heat is often stored longer in denser materials. These are density,, thermal conductivity, k, and heat capacity, Cp. density and k for thermal conductivity. The amount of thermal energy needed to raise a substance's temperature by 1°C is known as its heat capacity (with the value depending on which temperature scale is used).

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a certain screw jack has a pitch of 0.1cm and the diameter of the wheel to which the turning effect det up is 50cm. if the efficiency of the jack screw is 40%. what must be the force applied to lift a load of 25,000N?

Answers

A force of approximately 39.77 N must be applied to lift a load of 25,000 N, given the specified pitch of the screw jack and the efficiency of 40%.

The pitch of a screw jack is the distance traveled by the load for each revolution of the screw. In this case, the pitch is given as 0.1 cm, which means that for each complete turn of the screw, the load is lifted by 0.1 cm. The diameter of the wheel to which the turning effect is set up is given as 50 cm, which means that the circumference of the wheel is 50 cm x pi = 157.08 cm.

The efficiency of the jack screw is given as 40%, which means that the actual force required to lift the load is 1/0.4 = 2.5 times the ideal force. Therefore, the ideal force required to lift the load of 25,000 N is:

Ideal force = Load / Mechanical Advantage

The mechanical advantage of a screw jack is given by the formula:

Mechanical Advantage = circumference of wheel / pitch of screw

Substituting :

Mechanical Advantage = 157.08 cm / 0.1 cm = 1570.8

Ideal force = 25,000 N / 1570.8

Ideal force = 15.91 N (to two decimal places)

The actual force required to lift the load is 2.5 times the ideal force:

Actual force = 2.5 x 15.91 N

Actual force = 39.77 N (to two decimal places)

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In the rectanglehe sides have lengths 5 cm and 15 cm, q1 = -5 µC, and q2 = +2 µC.(a) With V = 0 at infinity, what is the electric potential at corner A?(b) What is the electric potential at corner B?(c) How much work is required to move a third charge q3 = +3 µC from B to A along a diagonal of the rectangle?d) Does this work increase or decrease the electric energy of the three-charge system?(e) Is more, less, or the same work required if q3 is moved along a path that is inside the rectangle but not on a diagonal?(f) Is more, less, or the same work required if q3 is moved along a path that is outside the rectangle?

Answers

The electric potential at corner A is -780 V.

What formula could be used to determine electric potential?

To solve this problem, we can use the formula for electric potential:

V = kq/r

where V is the electric potential, k is the Coulomb constant (9 x 10^9 N m^2/C^2), q is the charge, and r is the distance from the charge.

(a) To find the electric potential at corner A, we need to add the contributions from q1 and q2. The distance from q1 to A is 5 cm, and the distance from q2 to A is 15 cm. Using the formula for electric potential, we get:

V1 = kq1/r1 = (9 x 10^9 N m^2/C^2)(-5 x 10^-6 C)/(0.05 m) = -900 V

V2 = kq2/r2 = (9 x 10^9 N m^2/C^2)(2 x 10^-6 C)/(0.15 m) = 120 V

The total electric potential at A is the sum of V1 and V2:

V = V1 + V2 = -900 V + 120 V = -780 V

Therefore, the electric potential at corner A is -780 V.

(b) To find the electric potential at corner B, we use the same formula and distances, but with the signs of the charges reversed:

V1 = kq1/r1 = (9 x 10^9 N m^2/C^2)(5 x 10^-6 C)/(0.05 m) = 900 V

V2 = kq2/r2 = (9 x 10^9 N m^2/C^2)(-2 x 10^-6 C)/(0.15 m) = -120 V

The total electric potential at B is the sum of V1 and V2:

V = V1 + V2 = 900 V - 120 V = 780 V

Therefore, the electric potential at corner B is 780 V.

(c) To find the work required to move q3 from B to A along a diagonal of the rectangle, we can use the formula:

W = ΔV*q3

where ΔV is the change in electric potential, which is the difference between the electric potentials at B and A, and q3 is the charge. Using the values we found in parts (a) and (b), we get:

ΔV = V(B) - V(A) = 780 V - (-780 V) = 1560 V

W = ΔV*q3 = (1560 V)(3 x 10^-6 C) = 4.68 x 10^-3 J

Therefore, the work required to move q3 from B to A along a diagonal of the rectangle is 4.68 x 10^-3 J.

(d) Moving q3 from B to A along a diagonal of the rectangle increases the electric energy of the three-charge system. This is because the electric potential energy of a charge q in an electric potential V is given by:

U = qV

When q3 is moved from B to A, its electric potential energy increases because the electric potential at A is lower than the electric potential at B. Therefore, the work done to move q3 from B to A is converted into electric potential energy of the three-charge system.

(e) If q3 is moved along a path that is inside the rectangle but not on a diagonal, it will experience a different electric potential than if it were moved along a diagonal. Therefore, a different amount of work will be required to move q3 from B to A along this path. In general, the work required to move a charge between two points.

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if you weigh 100kg on earth, approximately how much would you weigh on the moon: a) 100kg b) 16kg c) 160 kg d) 60kg

Answers

An object that weighs 100 kg on Earth would have weight of about b) 16 kg on moon.

The weight of an object on the moon is different from its weight on Earth due to the difference in the gravitational force between the two objects. The gravitational force on the moon is much weaker than on Earth because the moon has less mass and a smaller radius.

Gravitational force on moon is 1/6th of gravitational force on Earth. Therefore, an object that weighs 100 kg on Earth would weigh about 16.6 kg (100 kg divided by 6) on the moon.

Therefore, the answer is (b) 16kg. It is important to note that the mass of the object remains the same on both Earth and the moon, as mass is a fundamental property of an object that does not change with location. However, weight is a force that is dependent on the gravitational force acting on the object, so it varies with location.

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what is pounds to newtons?

Answers

Answer:

Explanation:

1) in order to convert from pounds to newtons we first must convert pounds to kilograms using the conversion factor 1 kg = 2.2 lb

2) then we can use the formula fore force F = M * G where F is force in Newtons M is Mass in kg and G is the acceleration of earths gravity (9.8m/s/s).

Ex) lets say we have 5 lb. Fore every 2.2 lb we have 1 kg so we divide

5 lb by 2.2 lbs an get that 5 lb = 2.5 kg. now we plug this into the our force equation and get F = 2.5 * 9.8

F = 24.5 Newtons

The heat capacity of a bomb calorimeter was determined by burning 6.79 grams of methane (energy of combustion = -802 kJ/mol) in the bomb. The temperature changed by 10.8 degrees Celsius.
a. What is the heat capacity of the bomb?
b. A 12.6-gram sample of acetylene (
C
2
H
2
) produced a temperature increase of 16.9 degrees Celsius in the same calorimeter. What is the energy of combustion of acetylene (in kJ/mol)?

Answers

The energy of combustion of acetylene is 1097 kJ/mol and the heat capacity of the bomb calorimeter is -31.5 kJ/°C.

a. To determine the heat capacity of the bomb calorimeter, we need to use the equation:

q = CΔT

where q is the heat absorbed by the calorimeter, C is the heat capacity of the calorimeter, and ΔT is the change in temperature. The heat absorbed by the calorimeter is equal to the heat released by the combustion of methane, which can be calculated using the molar mass of methane and the energy of combustion per mole:

q = (6.79 g / 16.04 g/mol) × (-802 kJ/mol) = -340 kJ

Now we can substitute the values into the equation and solve for C:

-340 kJ = C × 10.8°C

C = -340 kJ / 10.8°C = -31.5 kJ/°C

Therefore, the heat capacity of the bomb calorimeter is -31.5 kJ/°C.

b. We can use the same equation to calculate the energy of combustion of acetylene:

q = CΔT

where q is the heat absorbed by the calorimeter, C is the heat capacity of the calorimeter (which we just calculated to be -31.5 kJ/°C), and ΔT is the change in temperature. The heat absorbed by the calorimeter is equal to the heat released by the combustion of acetylene, which can be calculated using the molar mass of acetylene:

q = (12.6 g / 26.04 g/mol) × (-n kJ/mol) = -(0.484 n) kJ

where n is the energy of combustion of acetylene in kJ/mol. Substituting the values into the equation, we get:

-(0.484 n) kJ = (-31.5 kJ/°C) × 16.9°C

n = (31.5 kJ/°C) × (16.9°C) / 0.484 = -1097 kJ/mol

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if a photon has the wavelength of 250 nm, what region of the em spectrum would it fall within?

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A photon with a wavelength of 250 nm falls within the ultraviolet (UV) region of the electromagnetic (EM) spectrum.

The EM spectrum ranges from high-energy gamma rays with very short wavelengths to low-energy radio waves with very long wavelengths. In between, there are various regions including X-rays, ultraviolet, visible light, infrared, and microwave.

The UV region is the region of the EM spectrum that has shorter wavelengths and higher energies than visible light. It is located between the visible and X-ray regions and is divided into three subregions: UV-A (320-400 nm), UV-B (280-320 nm), and UV-C (100-280 nm). A photon with a wavelength of 250 nm falls within the UV-C region, which has the shortest wavelengths and the highest energy photons within the UV region.

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D = m/V
where D is the density, m is the mass, and V is the volume. Record your calculations in Table A of your Student Guide.

What is the density of the table tennis ball? Record your answer to the nearest hundredth.

g/cm3

What is the density of the golf ball? Record your answer to the nearest hundredth.

g/cm3

Answers

The density,  D = m/V = 45.93/0.0225 = 2041.33 g/cm3.

What is density?

Density is a measure of mass per unit volume. It is defined as the mass of an object divided by its volume. Density is an important physical property of matter, as it affects the behavior of objects in different environments. Density is also a useful tool for measuring the concentration of a particular object or material. The higher the density of an object, the more mass it has for a given volume. Density is typically expressed in kilograms per cubic meter (kg/m3).

To calculate the density of the table tennis ball, we need to know the mass and volume of the ball. The mass of the table tennis ball is 2.7g, and the volume is 0.0067cm3. To calculate the density, we divide the mass by the volume, so D = m/V = 2.7/0.0067 = 402.99 g/cm3.

To calculate the density of the golf ball, we need to know the mass and volume of the ball. The mass of the golf ball is 45.93g, and the volume is 0.0225cm3. To calculate the density, we divide the mass by the volume, so D = m/V = 45.93/0.0225 = 2041.33 g/cm3.

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what is the term for a beam of light containing waves that are aligned in the same direction?

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A beam of light containing waves that are aligned in the same direction is called polarized light.

Polarization of light is a property that applies to turning waves that shows the geometrical blooming of the oscillations. In a turning wave, the way of the oscillation is ninety degrees of the motion of the wave. Plane polarized light has the two waves in which the way of vibration is similar for all waves. In circular polarization, the electric vector turns about the way of straight light as the wave progresses. If you glow a beam of polarized moonlight that is chromated light (light of only the one frequency – in different words a similar color) through a solution of a metamorphic active substance,  the light that comes out,  its plane of polarization is seen to have rotating or turning around. The rotating body may be clockwise or anti-clockwise.

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how to convert kj to calories

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To convert kilojoules (kJ) to calories (cal), you can use the following conversion factor: 1 calorie = 4.184 kilojoules

Joules (J) is the SI unit of energy. One joule is equal to the amount of energy required to perform one unit of work by applying a force of one newton through a distance of one meter in the direction of the force.

In other words, if a force of one newton is applied to an object and it moves one meter in the direction of the force, the work done is one joule.

Joules can be used to measure various forms of energy, including kinetic energy (the energy of motion), potential energy (the energy of position), and thermal energy (the energy of heat). Therefore, to convert kJ to calories, you can multiply the number of kJ by 4.184.

For example, if you have 200 kJ and want to convert it to calories, you would do:

200 kJ * 4.184 cal/kJ = 836.8 cal

So, 200 kJ is equal to 836.8 calories.

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Light energy with very low amplitude would be perceived asA:blueb:brightc:redd:dim

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Light energy with very low amplitude would be perceived dim.

To the human sight, such low amplitude light energy would appear weak. This is because of the  wave's amplitude, which in the case of light relates to the light's intensity or brightness and t will measure the size of its oscillations.

In other words, as a light wave's amplitude falls, it loses energy and becomes brighter to the eye. This is true because light with a specific range of amplitude and moderate intensity is best perceptible to the human eye. When there is insufficient light that falls outside of this spectrum, it is seen as being faint or invisible.

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what is the temperature of the moon?

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Moon's temperature is 127 degrees Celsius on its sunlit side while minus 173 degrees Celsius on its dark side, based on sunlight exposure.

The temperature of the moon varies greatly depending on its location, time of day, and other factors. The moon has no atmosphere, so it has no insulating effect, and its temperature can range from extremely hot to extremely cold. The moon's temperature can reach up to 127 degrees Celsius (261 degrees Fahrenheit) on its sunlit side, which is exposed to the sun's radiation, while the temperature can drop down to minus 173 degrees Celsius (-280 degrees Fahrenheit) on its dark side, which is not exposed to sunlight.

In addition to the temperature differences between the sunlit and dark sides of the moon, the moon's temperature also varies with the lunar day, which is about 29.5 Earth days long. During the lunar day, the temperature rises steadily as the sun rises and reaches its maximum when the sun is directly overhead. During the lunar night, the temperature drops rapidly as the surface loses heat through radiation.

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