The unit light-year is a measure of

A. time.

B. temperature.

C. brightness.

D. distance.

Brad and Erin decide to have a tug of war contest. Erin pulls the rope with all her might and so does Brad. Sadly, Brad only pulls with half the force that Erin pulls with. Which way will the rope move?

In a nuclear power station which step of the process converts energy of other forms into electrical energy that can be used as electricity? A) Fission reactions occur in the reactor core, generating heat.

Which of the following statement is false

Three positive charges are arranged as shown in the diagram. What is the magnitude and direction of the net electrical force acting on the + 3 µC charge? magnitude: 1.75 N direction: 6.2° north of east magnitude: 1.75 N direction: 6.

A canyon is a large, deep valley that is carved into rock over a long period of time. Which of the following most likely causes a canyon to form?

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

Sound travels slow in cold air. Why does the speed of sound depend on air temperature?

A tow truck pulls a 500 kg car so that the car accelerates 2 m/s2. What is the net force on the car? 250 N 498 N 1000 N 502 N

Which force keeps you near earths surface?

Name one process that requires a force in the human body.