List two ways to measure the gravitational potential energy of a ball when it’s dropped from different heights. Please give an argument to support you choices

What is relative velocity? in which condition is relative velocity known by adding the velocity of the first body and that of the second body

Which of the following are used in an electrochemical cell? a. electrodes b. electrolyte c. terminals d. all of the above

The electric potential v is constant everywhere within a certain region of space. which statement below is true? the choices are: the electric field is also constant (but not zero) within the region. a charged particle placed within the region will experience an electric force. the electric field is zero everywhere within the region. the electric field varies from place to place within the region.