What is not a wave of the eletromagnetic spectrum

How do refracting and reflecting telescopes use convex lenses and mirrors

Which is an example of negative acceleration? a snowboarder who increases speed when traveling downhill a biker who maintains a constant speed through a race a skateboarder who reduces speed when moving up a hill a runner who fluctuates speed by

A 11 g toy car moving to the right at 25 cm/s has a head-on nearly elastic collision with a 23 g toy car moving in the opposite direction at 31 cm/s. After colliding, the 11 g car moves with a velocity of 51 cm/s to the left.

A quarterback throws a football toward a receiver with an initial speed of 20 m/s at an angle of 30∘ above the horizontal. At that instant the receiver is 20 m from the quarterback.

If you were testing how well different dish soap cleaned grease, the independent (experimental) variable would be the:

Whats a similarity between distance and displacement

What is the difference between analog and digital sound transmission?

A 20 kilogram ball rolls down a 10 meter ramp at the rate of 15 meters per second.

Why does the falling speed of a ball keeps increasing every second when it is dropped from a building?

In your own words describe an interaction between the chromosphere and the hydrosphere