What element is the basis for all living things and can combine with other elements in many ways?

What is the potential energy for and object with mass of 15 Kg and 20 m above the ground?

You use sunglasses to reduce the glare of the sun when you go outside. You are taking advantages of light's ability to do which of the following? Possible Answers: to reflect to refract to diffract to polarize

An electromagnet is a with a core.

It takes Amir 4 seconds to run from his front door to the mailbox. If he can run at a top speed of 6.5 m/s, how far is it from his front door to the mailbox? A) 24.5 meters B) 26 meters C) 30.5 meters D) 32 meters

Calculate how much work you need to move the 130N trunk to a ledge 2 n above

For each of the following, describe the relationship as directly or inversely proportional: a) wavelength vs. frequency b) wavelength vs. energy c) frequency vs. energy ... ?

Can hand sanitizer be used as rubbing alcohol

Two objects experience a 12 N electrical force between them. What force will the objects experience if the distance between them is doubled?

a submarine moving directly upward in the water at constant speed. The weight of the summer and it is 500,000 N. The submarines motors are off. The magnitude of the buoyant force acting on the submarine is

If the car went 30 km west in 25 min. and then 40 km east in 35 min., what would be its total displacement?