Sunlight strikes a piece of crown glass at an angle of incidence of 35.8 degrees. Calculate the difference in the angle of refraction between a red (660. nm) and a green (550. nm) ray within the glass. The indices of refraction for the red and the green are n = 1.520 and n = 1...
November 22, 2012
Two waves in one string are described by the wave functions y1 = 2.90 cos (3.80x - 1.50t) y2 = 3.90 sin (4.80x - 2.10t) a) where y and x are in centimeters and t is in seconds. Calculate the superposition of the waves y1 + y2 at the points x = 1.50, t = 1.40. (Remember that ...
November 16, 2012
A 45.4 kg of beer rolls down a 3.05 m long plank leading from the flatbed of a truck 0.880 m above the ground. Determine the amount of work (in Joules) done on the keg by gravity.
November 1, 2012
HELP ! Two acrobats, each of 60.0 kg, launch themselves together from a swing holdings hands. Their velocity at launch was 8.00 m/s and the angle of their initial velocity relative to the horizontal was 46.0 degrees upwards. At the top of their trajectory, their act calls for ...
October 27, 2012