If measuring experimental results, what can you predict about the work output of a 1200 watt hair dryer? a. the work output of the hairdryer will be less than the work input b. the work output of the hairdryer will be equal to the work input c. the work output of the hairdryer will be greater than the work input d. the work output of the hairdryer cannot be predicted in the real world

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.)

An electromagnetic wave with frequency 65.0 hz travels in aninsulating magnetic material that has dielectric constant 3.64 andrelative permeability 5.18 at this frequency. the electric fieldhas amplitude 7.20 \times 10^{ - 3} {\rm v}/{\rm m}. a. what is the speed of propagation of the wave? b. what is the wavelength of the wave? c. what is the amplitude of the magnetic field? d. what is the intensity of the wave?

Galileos view of arrangement of the universe