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-Dominant- [34]
3 years ago
11

How is heat related to phase changes​

Physics
1 answer:
bekas [8.4K]3 years ago
7 0

The heat is used to break the bonds between the ice molecules as they turn into a liquid phase. Since the average kinetic energy of the molecules does not change at the moment of melting, the temperature of the molecules does not change.

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Consider the following kinds of electromagnetic waves:
marysya [2.9K]

Answer:

According to wavelengths in descending order: C, B, D, E and A

According to frequencies in descending order: A, E, D, B and C

According to speeds in vacuum: A =B =C =D =E

Explanation:

in the EM spectrum, radio waves have the longest wavelength while gamma rays have the shortest wavelength.

All EM waves travel with the same speed of 3*10^8m/s in a vacuum.

7 0
3 years ago
What region of the electromagnetic spectrum contains wavelengths the size of an atom? (10^-10 meters) What frequency does this w
DENIUS [597]

If a photon has a wavelength of about 10^-10 meters, it would be certainly in the X rays region and it would have a frequency of 2.99792458x10^18 Hz, that you can easily calculate using the relation that states that the product of the wavelength and the frequency of an electromagnetic wave aka light is always equal to 299,792,458 m/s which is the exact value of the speed of light!
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3 years ago
The greater an objects mass... The?
Blababa [14]

Answer:

B

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Explanation:

8 0
3 years ago
The potential energy of a 25 kg bicycle resting at the top of a 3 m high hill is _______ J
frozen [14]
The potential energy:
E p = m · g · h
m = 25 kg,  g = 9.81 m/s²,  h = 3 m
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5 0
3 years ago
Read 2 more answers
A motor pulls an 800 kg roller coaster train to the top of a 70 m hill. What is the change in the potential energy of the cars?
Angelina_Jolie [31]

Answer:

548800J

Explanation:

Given parameters:

Mass of roller coaster  = 800kg

Height of hill  = 70m

Unknown:

Change in potential energy  = ?

Solution:

The change in potential energy is the difference between the potential energy at the bottom and at the top.

Potential energy at the bottom is 0J

  So;

      Change in potential energy  = mgh - 0

m is the mass, g is the acceleration, h is the height

  Change in potential energy  = 800 x 9.8 x 70  = 548800J

5 0
3 years ago
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