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

Aboxcar traveling at 12 m/s approaches a string of 5 identical boxcars sitting stationary on the track. the moving boxcar collides and links with the stationary cars and they all move off together along the track. what is the final speed of the cars immediately after the collision? (you may take the mass of each boxcar to be 18,537 kg.)

Athermometer is removed from a room where the temperature is 70° f and is taken outside, where the air temperature is 10° f. after one-half minute the thermometer reads 60° f. what is the reading of the thermometer at t = 1 min? (round your answer to two decimal places.) ° f how long will it take for the thermometer to reach 30° f? (round your answer to two decimal places.)

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1