The temperature change is 75 degrees.
What is specific heat capacity?The specific heat capacity of a substance is the amount of heat added to a substance in order to make the temperature of 1 Kg of the substance to rise by 1 degree.
We know that;
H = mcdT
Where;
H = heat added
m = mass of water
c = heat capacity of water
dT = temperature change
So;
157.125 × 10^3 = 0.5 × 4,190 × dT
dT = 157.125 × 10^3/0.5 × 4,190
dT = 75 degrees
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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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An emergency vehicle blowing its siren is moving
away from you with a speed of 23 m/s. The sound you
hear has a frequency of 590 Hz. What is the frequency
produced by the siren?
The frequency produced by the siren is 631.12 Hz
Doppler effectThe variation in frequency when a source of sound moves relative to an observer is determined by the doppler effect.
Frequency of observerSo, the frequency of the observer f' = (v ± v')f/(v ± v") where
f' = 590 Hz
f = frequency of source or siren ,
v = speed of sound = 330 m/s,
v' = speed of observer = 0 m/s (since you are stationary) and
v" = speed of source = 23 m/s
Since the source moves away from the detector, the sign in the denominator is positive and v' = 0 m/s
So, f' = (v + 0)f/(v + v")
f' = vf/(v + v")
Since, we require the frequency of the source, make f subject of the formula, we have
Frequency of sirenf = (v + v")f'/v
Substituting the values of the variables into the equation, we have
f = (v + v")f'/v
f' = (330 m/s + 23 m/s) × 590 Hz/330 m/s
f' = 353 m/s × 590 Hz/330 m/s
f' = 208270 m/sHz/330 m/s
f' = 631.12 Hz
The frequency produced by the siren is 631.12 Hz
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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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Please help me!!!!!!!!
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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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
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
Rubbing a balloon on hair is an example of static charging by....
conduction
friction
induction
Answer:
friction
Explanation:
it's answer is friction
A neutral metal sphere is attracted to a positively-charged amber rod. Why does this occur?.
Hi there!
A neutral metal sphere is comprised of both ELECTRONS and PROTONS.
Recall that electrons have a NEGATIVE (-) charge, and protons have a POSITIVE (+) charge.
Opposite charges attract, and like charges repel.
In this instance, the positively-charged rod will cause the electrons in the neutral metal sphere to move towards the side facing the rod (opposite charges attract), which causes the two to be attracted to one another.
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
On a cosmic calendar, in which the history of the universe is compressed into one year, how long is the average human life span?.
Answer:
If one were to use 5 billion years as the age of the universe and 75 years as the average human life span then
T = 75 / 5 E9 = 1.5E-8
The number of seconds in a year is 3600 * 24 * 365 = 3.2E7
If t = N * T seconds in a year * fraction of human life span
t = 1.5E-8 * 3.2E7 = .48
A human life span is about 1/2 second compared to the life of the universe if the universe were compressed to a single year
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.
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 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:
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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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.
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 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.
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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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 :)
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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What is the power output of a pump which can raise 60kg of water height to height of 10m every minute
Answer:
Power = Work Done/time=> Power = 60×10×10/60
=> Power = 6000/60
=> Power = 100 Watt
Hence the power output of a pump is 100 Watts.
Earth's gravity acts upon objects with a steady force of __________. A. 8. 9 meters per second B. 9. 8 meters per minute C. 8. 9 meters per minute squared D. 9. 8 meters per second squared Please select the best answer from the choices provided. A B C D.
Answer:
9.8 meters per second squared
Explanation:
Answer:
9.8 meters per second squared
Explanation:
edge
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.
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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The Doppler effect A. is the basic explanation for the green shift of light in our Universe. B. occurs when the frequency of sound waves received is lower if the wave source is moving toward you than if it's moving away. C. can be applied to sound waves. D. occurs when the pitch of a sound gets lower if the source is approaching.
Answer:
B
Explanation:
hope that helps!
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
Use the table of electric force between objects in two different interactions to answer the question
Which conclusion about the interactions is correct?
A. The objects in interaction A are farther apart than in interaction B.
B. The objects in interaction A are smaller than in interaction B.
C. Repulsive forces are stronger than attractive forces
D. Positive charges are stronger than negative charges.
Answer: we can ues all the time
Explanation: and have fun with it
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:
Evidence that the universe is expanding is best provided by the.
