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What is the difference between internal energy, temperature, and heat?

Internal energy , temperature , and heat are closely related but distinct concepts. The microscopic particles that make up a body are in constant motion and may exert forces on each other. As such, they each...
SK
Answered by Sotirios K. • Physics tutor
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Explain what is meant by tensile stress and tensile strain.

Tensile stress is the force exerted per unit cross-sectional area on an object. Tensile strain is the extension per unit original length of an object.
PJ
Answered by Penelope J. • Physics tutor
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State what is meant by isotopes?

Isotopes are atoms with the same number of protons, but a different number of protons. Therefore, isotopes have the same atomic number but a different mass number. An example of an isotope is carbon-13, an i...
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Answered by Charlie H. • Physics tutor
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When catching a ball, a cricketer moves his hands for a short distance in the direction of travel of the ball as it makes contact with his hands. Explain why this technique results in less force being exerted on the cricketer's hands

As his hand moves back with the ball, the time taken to stop the ball is greater. This means that the rate of change of momentum is less (because the rate of him changing the speed of the ball is much slower...
LW
Answered by Lisa W. • Physics tutor
11845 Views

The electric potential energy of two protons is 1.0MeV. Calculate their separation

First thing first, we need to fully understand what we are asked and what topic we are being tested on. From this question, we can see that we are involved in electric fields, sicne we can see the "elec...
GK
Answered by George K. • Physics tutor
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