B1. A stone is dropped from the cliff. If the height of the cliff is 200cm.

(a) calculate

(1)

Potential energy after falling for 20 seconds

A friend of yours who has not taken astronomy sees a meteor shower (she calls it a bunch of shooting stars).

If the planet mars is about 56 million kilometers from earth how long would it take for a radio wave sent from a space satellite circiling mars to reach earth

why it's impossible for baseball players to make sharp turns when moving form base to base? explain using Newton 1st law "object in rest stays in rest, object in motion stays in motion"

First, design an experiment you could conduct that might measure current and resistance.

An object traveling 50 m/s comes to a stop in 4 seconds. What is its acceleration

An acrobatic airplane performs a loop at an airshow. The centripetal acceleration the plane experiences is 14.7 m/s2. If it takes the pilot 45.

Which of the following was NOT an outcome of Bacon's rebellion? A. A more direct focus on the "Indian Problem" B. A more focused plain to isolate black slaves from white servants C.

A science class did an investigation to see how many breaths it took for each student to blow up a balloon. Jason blew up his balloon with the fewest breaths. Which of these might explain why Jason took fewer breaths to blow up his balloon? A.

How the behavior of waves is affected by a medium

Suppose the gravitational force between two spheres is 100 N. If the distance between the spheres is halved, what is the new gravitational force between them?