Consider a single photon with a wavelength of λ, a frequency of ν, and an energy of e. what is the wavelength, frequency, and energy of a pulse of light containing 100 of these photons?
a) 100λ, 100ν, and e
b) 0.01λ, ν, and 100e
c) λ, ν, and 100e
d) 0.01λ, 0.01ν, and 0.01e
e) 100λ, 100ν, and 100e

Work = force × a. work b. energy c. distance d. momentum

Cathy is pedaling down a steep hill on her bicycle and wants to be able to coast up the next hill, which is 25 meters high, without pedaling. cathy and her bicycle have a mass of 75 kg. assuming her bicycle is 100% efficient, what would her speed have to be?

Anonzero net force acts on a particle and does work. which one of the following statements is true? the kinetic energy of the particle changes, but the speed of the particle does not change. the kinetic energy of the particle does not change, but the speed of the particle does change. the kinetic energy of the particle changes, but the velocity of the particle does not change. the kinetic energy and the speed of the particle change, but the velocity of the particle does not change. the kinetic energy, speed, and velocity of the particle change.