Blog

What type of energy does a bird have because of its temperature?

Which of the following are greenhouse gases? Choose all that apply.

Which of the following is more energy efficient? (For this question, thermal energy does not count as kinetic energy.)

For the points P and Q, find the coordinates of the midpoint of the segment PQ. P(-1, 8), Q(-3, 5)

How would the electric force cause two protons in close proximity to behave?

Your body temperature is about 98 degrees Fahrenheit. Suppose you step into a 120-degree Fahrenheit sauna. Which way does thermal energy flow? 

A positron is a particle with the same mass as an electron, but with positive charge. How would the electric force cause a positron and an electron in close proximity to behave?

Match each type of quantity to its unit.

Match each particle to its electric charge. Some charges will not be used.

A pendulum swings down and goes up but not to the same height as before.  One student says it should have been able to make it.  A second student says there is no way this is possible.  Use the idea of conservation of energy to explain why the pendulum did not return to the same height as before.  Is it ever possible to have the pendulum reach the same height?  If yes, under what conditions would allow the pendulum to reach the same height?  If no, explain why.