If light needs matter, how doe it move through space? this is my first question.

What is the english system of measurement

During which sleep stage does dreaming usually occur? A. Stage 3 B. Stage 2 C. Stage 1 D. REM

What is the young modulus of wood

About 10-15% of all galaxies are which shape?

If three balls of different materials were dropped at the same time from the same height, which would hit the ground first? (Assume there is no air resistance.)

A 2.0-kilogram laboratory cart is sliding across a horizontal frictionless surface at a constant velocity of 4.0 meters per second east. What will be the cart's velocity after a 6.0-newton westward force acts on it for 2.

A boat floats with 25% of its volume under water. a. What is the boatâs density? b. If the boat was made from 500 kg of metal, what is the volume of the boat? (Assume the air in the boat has negligible mass and density) c.

Why does each mineral have their own property, different from every other mineral?

Earth's tallest mountain ranges are found at plate boundaries

Is a lung a living organism, why or why not?