An optical fiber is made of glass with an index of refraction of 1.24. Assuming the fiber is surrounded by air, for what minimum angle of incidence (in radians) will light remain in the fiber

In a heat engine if 1000 j of heat enters the system the piston does 500 j of work, what is the final internal energy of the system if the initial energy was 2000 j? 1. write the equation 2.list out your known variables 3.plug the numbers into the equations 4.solve 5.write your solution statement that includes initial energy and final

The experiment done in lab is repeated, using a ball that has unknown mass m. you plot your data in the form of f 2 versus m/l, with f in rev/s, m in kg, and l in m. your data falls close to a straight line that has slope 3.19 m/(kg · s2). use g = 9.80 m/s2 and calculate the mass m of the ball.

While the change in blank will remain the same during a collision, the force needed to bring an object to a stop can be blank if the time if collision is blank