An atom with two protons, three neutrons and two electrons would have a mass of about how many atomic mass units?

How does the law of conservation of energy apply to the transformation of various forms of energy? Explain with examples.

You look for shells when you visit the beach. However, if you're hiking in the mountains and you find shells by accident, you know that A) the mountain has a lake nearby. B) the mountain was once under the sea.

Anything that had mass and takes up space is an example of

Calculate the average speed in meters/minute for the trip represented by the walk graphed here. A) 0.5m/min B) 1m/min C) 5m/min D) 30m/min

A boy releases a small 1 kg toy truck from rest down a 5 meter high hill. assuming there is no friction, what is the maximum kinetic energy the truck could have at the bottom?

What is ___ heating of a liquid__ gas to liquid

A gate in an irrigation canal is constructed in the form of a trapezoid 2 m wide at the bottom, 38 m wide at the top, and 2 m high. It is placed vertically in the canal so that the water just covers the gate.

A machine with a mechanical advantage of 10 is used to produce an output force of 250 newtons. What input force is applied to this machine

Why do you float in space

How does physical change affect the identity of a substance