What is a medium and why do waves travel through them?

The rate of distance traveled per unit of time, without regard to direction

In the table below, which statement would best fill the missing box under isolated systems? Open system Matter freely moves Energy freely moves Isolated system Matter does not freely move A-Energy is variable b-energy is not exchanged C-Energy

a 20 kg sig is pulled by a horizontal force such that the single rope holding the sign make an angle of 21 degree with the verticle assuming the sign is motionless find the magnitude of the tension in the ropend the magnitude of the horizontal force?

What is temperature? O A. The amount of energy needed to increase the heat of a substance by 1 degree O B. A measure of the total kinetic energy of the particles in a substance O c. A measure of how hot or cold something is O D.

The sun is part of which type of galaxy? a. irregular b. elliptical c. central d. spiral

Why do atoms move at different speeds depending on wether they are liquids or solids

What are the arrangement of resistors in series

A cell provides 6 V to an LDR. The current through this LDR is measured and is found to be 3 A. What is the resistance of the LDR?

A car travels along eastward with a constant velocity. the magnitude of the acceleration of the car is

What is the weight of a 65 kg astronaut on mars?