Describe the difference between physical and chemical changes in terms of what happens to the molecules

SO what exactly is beyond our atmosphere, like space, has anybody actually been in space? or are we just making hopeless fantasies

A 2kg Book is sitting on a table. a 10n Force is pulling to the right. a 3n Force is pulling to the left what is the net force acting on the book?

Predict which will fall to the ground faster accomplish and paper or flat sheet paper

What are flux lines?

What happens to the atomic number of an atom when the number of neutrons in the nucleus of that atom increases? It decreases. It increases. It remains the same.

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

A scientist pours grape juice on three identical white shirts He then uses three different cleaning products on the shirts and measures how clean they get what is the independent variable in this experiment