A rock is dropped into the Grand Canyon. It takes 18 seconds to hit the bottom. Calculate how deep the canyon is.

Which is not a device for reproducing sound? MP3 player microphone gramophone phonograph

A lever is used to lift up a 100N weight. The fulcrum is 10cm from the weight. If the effort force is applied at a distance of 50cm from the fulcrum, what is the effort force required to lift the 100N weight? A) O N B) 20 N C) 50 N D) 100 N

Rachel is wearing roller skates and is standing next to a wall. She pushes off from the wall and then glides to a stop. Plan an X in the lines next to all the statements that you think are true about Rachel's motion.

Which of the following lines (of latitude or longitude) would be represent by 180 South Pole Equator Prime meridian North Pole International day lind

A wheelbarrow is an example of what type of lever

If you push on a wall with a force of 200 N, with what force does the wall push back?

What form of matter is "vapor"?

If a recipe says to bake a pizza in 250 degrees Celsius at what temperature should you set your temperature that uses Fahrenheit scale

A German scientist, George Ohm, discovered the relationship between current, voltage, and resistance. This became known as Ohm's law.

The amount of fluid displaced by a submerged object depends on its