Determine the speed of a falling object 7.8 sec after it dropped. a. 39 m/s
b. 304.2 m/s
c. 1.3 m/s
d. 78 m/s

What is the relationship between the wavelength of a wave and it's energy?

Exercise 2. find the wavelength of a photon emitted when an electron jumps from the n = 3 energy level down to the n = 2 energy level. where is this photon in the electromagnetic spectrum?

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.