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Suppose that yesterday your body had a mass of 50.0 kg. This morning you stepped on a scale and found that you had gained weight.
a. What happened, if anything, to your mass ?
b. What happened, if anything, to the ratio of your weight to your mass ?
A proton is projected in the positive x direction into a region of uniform electric field E = -5.50 105 i N/C at t = 0. Determine the time interval over which the proton comes to rest
A copper wire of length 25 cm is in a magnetic field of 0.20 T. Ifit has a mass of 10 g, what is the minimum current through the wire that would cause a magneticforce equal to its weight?
A force of 180 N is required to keep a small boat moving at 2.91 m/s. What is the power needed to keep the boat moving at the steady speed? If the resistive force of the water increases by the square of the speed, what power is needed if the speed is..
Sketch a graph of maximum kinetic energy, KE max against visible light frequency, v for this experiment Label threshold frequency Vc.
If two successive overtones of a vibrating string are 420 Hz and 480 Hz, what is the frequency of the first overtone
A 1140nF capacitor with circular parallel plates 1.12cm in diameter is accumulating charge at the rate of 20.7mC/s at some instant in time. What will be the induced magnetic field strength 10.8cm radially outward from the center of the plates? Wh..
A 53 kilogram driver sits in her car waiting for the traffic light to change. Evaluate the average force exerted on the driver
Suppose that 5gm of air is adiabatically compressed so as to raise its temperature from 20deg to 400 deg. How much work must be done on the air to compress it?
Light from a laser strikes a diffraction grating that has 5 312 grooves per centimeter. Determine the wavelength of the laser light
What is the total resistance of the circuit below?
a container is filled to a depth of 20.0 cm with water. on top of the water floats a 35.0 cm thick layer of oil with
A car (m = 700.0 kg) accelerates uniformly from rest up an inclined road which rises uniformly, to a height, h = 42.0 m. Find the average power the engine must deliver to reach a speed of 20.3 m/s at the top of the hill in 24.5 s
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