By applying a force of 50N, a pulley system can lift a box with a mass of 20 kg. What is the mechanical advantage of the pulley system?

1. A racecar accelerates uniformly from 20.0 m/s to 50.0 m/s in 30 seconds Determine the acceleration of the car and the distance traveled.

9. which of the following statements best explains why a city on the windward side of a mountain gets more precipitation than one on the leeward side of the mountain A. warm, moist air descends and loses its moisture B.

Can energy be created or destroyed?

Rt a - the forces acting on an oil droplet watch the animation. identify the types of forces acting on an oil droplet while the voltage is turned on and the droplet is either falling or rising.

Walter Arfeuille of Belgium lifted a 281.5 kg load off the ground using his teeth. Suppose Arfeuille can hold just three times that mass on a 30.0° slope using the same force.

As energy moves in waves through the water, the water moves a. in waves toward shore. c. in the direction of the waves. b. in a small circular movement. d. against the current.

Which of the following values represents an index of refraction of an actual material? A. 0 B. 1 / 4 C. 5 / 4 D. 1 / 2

Which statement best describes the effect of scientific advances on society? A. They always have a positive impact on society. B. They are inspired by the needs of society. C. they do not affect society beyond the community level. D.

Which way does wind blow, A. horizontally, B. Only from east to west, C. Only from West to east, D. vertically

If you were asked how to evaluate scientific evidence, what would you would want to include in your answer?