What is the force that can cause two pieces of iron to attract each other?

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