A light beam which is amplified into a strong concetrated beam of light is known as A) a laser. B) a transistor. C) a microwave oven. D) a light emitting diode.

David walks 3 km north, and then turns east and walks 4 km

Who was the first astronaut to step outside of the Apollo 11 spacecraft, saying the now famous words "one small step for man, one giant step for mankind" as he placed the American flag on the rocky terrain?

An apple drops from a tree and hits the ground in 1.5s what is its speed just before it hits the ground?

If the string is tied around your finger, when do you feel a stronger pull-when the rock is at the bottom of the swing or at the top?

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?

Your university radio stawon has a 5.0-kw radio transmixer that broadcasts uniformly in all direcwons; listeners within 15 km have reliable recepwon. you want to increase the power to double that range. what should be the new power?

A projectile is thrown upward so that its distance above the ground after t seconds is h (t) equals negative 16 t squared plus 704 t. a) Find the maximum height the object reaches. b) Find the time it takes the object to reach the ground.

Whats an example of projectile motion

The fact that the sun rises and sets at different times during the day depending on the time of year is an example of a data trend. True or False

What sample of matter is a single substance