What is the weight of an object with a mass of 19 kg?
Answer:
Every 2.2 kg is 1 pound. So mulitply 19 * 2.2. It's gonna be equal to 41.8
Explanation:
Statement:
Mass of an object is 19 Kg.
To find out:
The weight of the object.
Solution:
Mass of the object = 19 Kg
Acceleration due to gravity = [tex] \sf9.8 {m \: {s}^{ - 2} }[/tex]
We know, weight = mass × acceleration
Therefore, weight of the object
= (19 × 9.8) N
= 186.2 N
Answer:
The weight of the object is 186.2 N.
Hope you could understand.
If you have any query, feel free to ask.
What can be done to improve the efficiency of a ramp?
A.) Make it shorter and steeper.
B.) Add a rough surface.
C.) Insulate the surface with foam.
D.) Smooth the surface
The efficiency of the ramp can be improved by smoothening the surface. The correct option is D.) Smooth the surface
Efficiency
Efficiency is the percent of work put into a machine by the user that becomes work done by the machine.
It could also be defined as the percentage ratio of the output energy to the input energy.
The closer to 100 percent a machine’s efficiency is, the better it is at reducing friction.
Therefore, a surface that would provide a lower friction would increase the efficiency of the ramp.
A smooth surface reduces friction.
Hence, the efficiency of the ramp can be improved by smoothening the surface. The correct option is D.) Smooth the surface
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What can moving electric charge produce? In what direction is it generated?
Answer:
Explanation:
answer: it can produce a magnetic field and it it generated counter clock wise -8th grade
Charges are made by electrons or protons or other particles with active energy to conduct. Moving charges produce an electric current and an associated magnetic field.
What is electric field?An electric field is created by the electric charges and the resulting force of field lines. There are both positive and negative charges. Electrons are negatively charged particles whereas positively charged particles are called protons.
The movement of charges creates the electric current or electricity. The direction of electric current is opposite to the passage of electrons. In all electronic devices and electrolytes, the electrons and positive ions have a mobility and they generate current.
A moving electric field is associated with a magnetic field in a perpendicular direction. For example earth is a rotating magnet. Because, the charges in the earth produce the electric current which when rotates results in a magnetic field in the perpendicular direction.
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Help PLZ!!!! The ability of something to potentially catch on fire is ___________.
A. physical change
B. physical property
C. Chemical change I chose this one and it was wrong.
D. Chemical Property
Answer:
Chemical Property
Explanation:
Examples of chemical properties include flammability, toxicity, acidity, reactivity (many types), and heat of combustion.
Please help me!!!!!!!!
Explain how the force of electric interactions is related to the force of magnetic interactions.
Explanation:
An electric force is a force of attraction or repulsion between charged particles, which have unequal numbers of protons and electrons.
Similar to electric charges, opposite poles attract, and like poles repel. The stronger the magnets and the closer together they are, the stronger the magnetic force between them.
electric field lines point in the opposite direction WHAT charges would move if they were in the field
Answer:
Negative
Explanation:
hope i helped
What is the average time in days between moon phases?.
Answer:
28
Explanation:
There is a 28 day cycle of the moon phase as it rotates on earths axis.
Greg built a new skateboard. After testing prototypes multiple times and collecting evidence, Greg advertises that his board can withstand 2000 newtons of force without breaking.
Which of the following ways of presenting this evidence would be the most useful for demonstrating that the device works as he says it does?
A.
by writing a list of the materials from which the prototype is built
B.
by showing photographs of different people riding the skateboard
C.
by showing graphs or charts that contain data from the design tests
D.
by writing an essay describing tricks he performed on the skateboard
Hi✨
also was it A?
Apparently I need twenty characters so✨
A sound signal traveling underwater has a frequency of 230 hertz. The speed of sound under water is 1. 45 × 103 meters/second. What is the wavelength of the sound signal? A. 6. 3 meters B. 2. 3 meters C. 3. 0 meters D. 1. 2 meters E. 9. 3 meters.
Answer:
A.6.3
Explanation:
Which activity directly converts energy from the sun?.
Who was th efirst person to come up with the idea of the atoms.
Answer:
Democritus
Explanation:
Democritus was a Greek philosopher who was the first person to use the term atom . However ,John Dalton was the first to adapt Democritus’ theory into the first modern atomic
model
At 90°C. you dissolved 10 g of KCI in 100. g of water. Is this solution saturated or unsaturated?
A. saturated
B. unsaturated
Answer:
B. unsaturated
Explanation:
The average mass of a rhinoceros calf is 45 kg. What is its weight in newtons? Round your answer to the nearest whole number. 5 N 45 N 250 N 441 N.
Answer:
441 [N].
Explanation:
Weight=mass*g, where mass=45; g=9,8.
Weight=45*9.8=441 [N].
How to know which side is positive or negative on resistors.
Answer:
"look for a large stripe or a minus sign (or both) on one side of the capacitor."
Explanation:
i hope it helped :)
What term refers to the part of a spacecraft that is occupied by the crew for takeoff and landing?
command module
annum module
service module
lunar module
water has a specitic hect capacity of 4200J/kg°.How much heat energy must be supplied to raise the temperature of 1.5 kg of water by
10°c
Answer:
Q=MCT Q= 1.5 kg*4200*10. Q=63000 joule
No matter what values of m and k you used for the spring, what is the ratio of the period to k m.
The relationship between the period of an oscillating spring and the attached mass determines the ratio of the period to [tex]\sqrt{\dfrac{m}{k} }[/tex].
Response:
The ratio of the period to [tex]\sqrt{\dfrac{m}{k} }[/tex] is always approximately 2·π : 1How is the value of the ratio of the period to [tex]\sqrt{\dfrac{m}{k} }[/tex] calculated?Given:
The relationship between the period, T, the spring constant k, and the
mass attached to the spring m is presented as follows;
[tex]T = \mathbf{2 \cdot \pi \cdot \sqrt{\dfrac{m}{k} }}[/tex]
Therefore, the fraction of of the period to [tex]\sqrt{\dfrac{m}{k} }[/tex], is given as follows;
[tex]\mathbf{\dfrac{T}{ \sqrt{\dfrac{m}{k} }}} = 2 \cdot \pi[/tex]
2·π ≈ 6.23
Therefore;
[tex]T :{ \sqrt{\dfrac{m}{k} }} = 2 \cdot \pi : 1[/tex]
Which gives;
The ratio of the period to [tex]\sqrt{\dfrac{m}{k} }[/tex] is always approximately 2·π : 1Learn more about the oscillations in spring here:
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Aluminum allows for the flow of electrons, while glass does not. Would an aluminum wire surrounded by glass be an effective design for a device that will need to carry an electric current?(1 point)
No, it would not. Both aluminum and glass are insulators, so the device would not carry a current.
Yes, it would. The glass would carry the current, while aluminum is an insulator.
Yes, it would. Aluminum is a conductor, and the glass would prevent electricity from transferring to a person holding the device
No, it would not. Both aluminum and glass are conductors, so the current would be exposed to outside elements.
answer
no
Explanation:
I do not think that I would because even though its a conductor in the insulator I think it would insulate it before it will work (not sure if that makes sense)
Aluminum is a conductor, and the glass would prevent electricity from transferring to a person holding the device.
What is meant by a conductor ?A substance or material that permits electricity to flow through it is known as a conductor or electrical conductor.
Here,
When potential difference is provided, electrical charge carriers, often electrons or ions, travel effortlessly from atom to atom in a conductor.
Since aluminium foil is a recognized conductor of electricity, when a charge is given to it, electrons can pass freely through the material.
By allowing electrons to easily move through its structure, aluminium acts as a conductor of electricity. This is feasible because the atoms that make up the structure of aluminium have three valence electrons in their outermost shell, which makes them highly reactive and ideal for carrying electrical currents.
Glass is an insulator.
A material that blocks the movement of electrons is known as an insulator, and as a result, it prevents the flow of electric current.
Hence,
Aluminum is a conductor, and the glass would prevent electricity from transferring to a person holding the device.
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1000-kg car (including the driver) traveling 20 m/s goes around a 125-m radius curve at constant speed. What is the work done by friction on the car as the car makes the turn, in Joules
The work done by friction on the car as it makes the turn is [tex]2.514 \times 10^6 \ J[/tex].
The centripetal force on the carThe kinetic friction of the car produces the centripetal force needed to keep the car in the circular path.
[tex]Ff = F_c = \frac{mv^2}{r}\\\\ F_c = \frac{1000 \times 20^2}{125} \\\\F_c = 3200 \ N[/tex]
The distance around the curved path[tex]d = 2\pi r\\\\d = 2\times 3.142 \times 125\\\\d = 785.5 \ m[/tex]
Work done by frictionThe work done by friction on the car as it makes the turn is calculated as follows;
[tex]W = F_c d\\\\W = 3200 \times 785.5\\\\W = 2.514 \times 10^6 \ J[/tex]
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An electric iron is labeled 1000W. How many Joule of energy is consumed if it is used for one hour?
Answer:1kwh
Explanation:E=PT
E=1000w(3600s)
E=1kwh
Please help
What is the acceleration (in m/s squared) of the 100 kg water bucket when you apply 100 newtons of force?
What is the acceleration (in m/s squared) of a 40 kg mass when you apply 60 newtons of force?
What is the amount of force needed (in N) to accelerate a 200 kg mass to 0.50 m/s squared?
What is the force (in N) needed to accelerate 250 kg to 0.75 m/s squared?
How much force (in N) is needed to accelerate 140 kg to 2 m/s squared?
This question involves the concept of Newton's Second Law of Motion.
a) The acceleration is "1 m/s²".
b) The acceleration is "1.5 m/s²".
c) The amount of force needed is "100 N".
d) The force needed is "187.5 N".
e) The force needed is "280 N".
NEWTON'S SECOND LAW OF MOTION:According to Newton's Second Law of motion whenever an unbalanced force is applied on an object, it produces an acceleration in the object in the direction of the force itself.
Mathematically,
[tex]F = ma[/tex]
where,
F = Applied Forcem = mass of the objecta = accelerationa)
Here,
F = 100 Nm = 100 kga = ?Therefore,
[tex]a=\frac{F}{m}=\frac{100\ N}{100\ kg}[/tex]
a = 1 m/s²
b)
Here,
F = 60 Nm = 40 kga = ?Therefore,
[tex]a=\frac{F}{m}=\frac{60\ N}{40\ kg}[/tex]
a = 1.5 m/s²
c)
Here,
F = ?m = 200 kga = 0.5 m/s²Therefore,
[tex]F=ma = (200\ kg)(0.5\ m/s^2)[/tex]
a = 100 N
d)
Here,
F = ?m = 250 kga = 0.75 m/s²Therefore,
[tex]F=ma = (250\ kg)(0.75\ m/s^2)[/tex]
a = 187.5 N
e)
Here,
F = ?m = 140 kga = 2 m/s²Therefore,
[tex]F=ma = (140\ kg)(2\ m/s^2)[/tex]
a = 280 N
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Rubbing a balloon on hair is an example of static charging by....
conduction
friction
induction
Answer:
friction
Explanation:
it's answer is friction
A car weighs 6000 N on the Earth's surface, what is its weight 3 times
Earth's radius away from the center of the Earth? (N)
Answer:
667 N
Explanation:
[tex]\pink{\frak{Given}}\Bigg\{ \textsf{ A car weighs 6000 N on the Earth's surface.}[/tex]
And we need to find out the weight of the car at a distance equal to 3 times the radius of the earth , from the centre of the earth.
We can find the acceleration due to gravity at a height h from the earth's surface as ,
[tex]\sf\longrightarrow \red{ g_h = g\bigg[ 1 +\dfrac{h}{R_e}\bigg]^{-2}}[/tex]
The height here will be 3R - R = 2R , since 3R is the distance from the centre of the earth .In above equation multiply both sides by m ,
[tex]\sf\longrightarrow mg_h = mg\bigg[ 1 +\dfrac{h}{R_e}\bigg]^{-2}[/tex]
Now here at the place of mg we can substitute 6000N , and mg[tex]_h[/tex] will be the weight at height h which we are interested in finding .
[tex]\sf\longrightarrow W_h = 6000 \bigg[ 1 +\dfrac{2R}{R}\bigg]^{-2}\\[/tex]
[tex]\sf\longrightarrow W_h = 6000 [ 1 + 2 ]^{-2}\\ [/tex]
[tex]\sf\longrightarrow W_h = 6000 [ 3]^{-2}\\[/tex]
[tex]\sf\longrightarrow W_h = 6000 \times \dfrac{1}{3^2}=\dfrac{6000}{9}\\ [/tex]
[tex]\sf\longrightarrow \boxed{\bf Weight_h = 667N \ \ (approx) } [/tex]
What is the difference between light and electromagnetic wave?.
Explanation:
Explanation:Light is a form of electromagnetic radiation. Other forms of electromagnetic radiation include radio waves, microwaves, infrared radiation, ultraviolet rays, X-rays, and gamma rays. ... The only difference between them is their wavelength, which is directly related to the amount of energy the waves carry.a net force f accelerates a mass m with an acceleration a. if the same net force is applied to mass 5m, then the acceleration will be
Answer:
F=ma
a =F/m
a =F/5m ms-2,,,,,
If the same net force is applied to a mass 5 times larger, the acceleration will be one-fifth of the original acceleration.
What is acceleration?
According to Newton's second law of motion, the acceleration of an object is directly proportional to the net force acting on the object and inversely proportional to the mass of the object. The mathematical formula for this relationship is:
a = F / m
where a is the acceleration of the object, F is the net force acting on the object, and m is the mass of the object.
Given that a net force F accelerates a mass m with an acceleration a, we can write:
a = F / m
If the same net force F is applied to a mass 5m, then the acceleration a' of the mass is:
a' = F / (5m)
a' = (1/5) * (F / m)
We can see that the acceleration of the larger mass is one-fifth the acceleration of the smaller mass. Therefore, if the same net force is applied to a mass 5 times larger, the acceleration will be one-fifth of the original acceleration.
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What happens to velocity when elasticity decreases.
Answer: An elastic collision is a collision in which there is no net loss in kinetic energy in the system as a result of the collision. Both momentum and kinetic energy are conserved quantities in elastic collisions. ... They collide, bouncing off each other with no loss in speed.
The planet Venus has a mass of 4.87 × 10^24 kg, and Earth has a mass of 5.97 × 10^24 kg. How far apart are the two planets when they exert a gravitational force of 1.12 × 10^18 N on one another?
Taking into account the Universal Law of Gravitation, Venus and Earth are separated by a distance of 1,316,302,384 m.
Universal Law of GravitationThe Universal Law of Gravitation establishes that bodies, by the simple fact of having mass, experience a force of attraction towards other bodies with mass, called gravitational force.
The Universal Law of Gravitation states that the gravitational force between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance that separates them. Mathematically it is expressed as follows:
[tex]F=G\frac{Mm}{d^{2} }[/tex]
where:
G is the universal gravitational constant, with a value of 6.67×10⁻¹¹ [tex]\frac{Nm^{2} }{kg^{2} }[/tex].M and m are the masses of the bodies that interact.d is the distance that separates them.Distance of Venos and EarthIn this case, you know:
F= 1.12×10¹⁸ NG= 6.67×10⁻¹¹ [tex]\frac{Nm^{2} }{kg^{2} }[/tex]M= mass of Venus= 4.87×10²⁴ kgm= mass of Earth= 5.97×10²⁴ kg d= ?Replacing in the Universal Law of Gravitation:
[tex]1.12x10^{18} N=6.67x10^{-11} \frac{Nm^{2} }{kg^{2} }\frac{4.87x10^{24} kgx5.97x10^{24} kg}{d^{2} }[/tex]
Solving:
[tex]1.12x10^{18} N=6.67x10^{-11} \frac{Nm^{2} }{kg^{2} }\frac{2.90739x10^{49} kg^{2} }{d^{2} }[/tex]
1.12×10¹⁸ N÷ 6.67×10⁻¹¹ [tex]\frac{Nm^{2} }{kg^{2} }[/tex]= [tex]\frac{2.90739x10^{49} kg^{2} }{d^{2} }[/tex]
1.678×10 ²⁸[tex]\frac{kg^{2} }{m^{2} }[/tex]= [tex]\frac{2.90739x10^{49} kg^{2} }{d^{2} }[/tex]
1.678×10 ²⁸[tex]\frac{kg^{2} }{m^{2} }[/tex]× d²= 2.90739× 10⁴⁹ kg²
d²= 2.90739× 10⁴⁹ kg²÷ 1.678×10 ²⁸[tex]\frac{kg^{2} }{m^{2} }[/tex]
d²= 1.73265 m²
d= √1.73265 m²
d=1,316,302,384 m
Finally, Venus and Earth are separated by a distance of 1,316,302,384 m.
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A student drops a bag of mass m onto a cart of mass M that is sliding with speed vo along a horizontal track with negligible friction. Immediately after the bag lands in the cart, the cart-bag system moves with speed uf. Which of the following statements correctly relates the two speeds and gives a correct reason for this relationship?
A. vf
B. Uf 00, because the kinetic energy of the bag decreases.
C. Uf > Vo, because the linear momentum of the bag is added to the linear momentum of the cart.
D. Uf = vo, because the bag is moving perpendicular to the cart.
When the bag lands on the cart, it follows that vf < vo given the fact that some mechanical energy is now lost by the system.
What is friction?The term friction refers to the force that opposes motion. The direction of the frictional force is opposite to the force that causes motion.
When the bag lands on the cart, it follows that vf < vo given the fact that some mechanical energy is now lost by the system. Note that the potential energy of the bag is converted to kinetic energy.
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Which comparison can be made about a phase change common to acetic acid and water based on the graph?
А.
More heat energy is required to vaporize a gram of water than to vaporize a gram of acetic acid.
В.
Given the same rate of added heat, the temperature of a gram of water will increase at a faster rate than a gram of acetic acid.
C.
More heat energy is required to melt a gram of acetic acid than to melt a gram of water.
D.
Given the same rate of heat loss, the temperature of a gram of acetic acid vapor will decrease at a slower rate than a gram of water.
The comparison between water and acetic acid which are both polar compounds is that; "more heat energy is required to vaporize a gram of water than to vaporize a gram of acetic acid."
Polar compounds
The term polar compounds refers to those compounds that possess a dipole moment hence they have a positive end and a negative end. These compounds have a high melting point and boiling point.
Based on the graph, the comparison between water and acetic acid which are both polar compounds is that; "more heat energy is required to vaporize a gram of water than to vaporize a gram of acetic acid and more heat energy is required to melt a gram of acetic acid than to melt a gram of water."
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