At a construction site a pipe wrench struck the ground with a speed of 23 m/s. (a) from what height was it inadvertently dropped? (b)how long was it falling?

What is special about a dc circuit ?

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

Light traveling in water, nwater = 1.33, strikes a plastic block at an angle of incidence of 51.4°; part of the beam is reflected and part is refracted. if the index of refraction of the plastic is 2.0, what is the angle made by the reflected and refracted beams?