What is the weight of a 5kg object at the surface of the earth? A. 49N
B. 49kg
C. 5.0kg
D. 25N

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

If the ama of the inclined plane below is 2, calculate the ima and efficiency. ima = efficiency =

Answer on edg: what happens to the light coming from the sun? - scattering what happens to light on the surface of water? - specular reflection what happens to light on the surfaces of rocks? - diffuse reflection