The force between two charges, q, and 92, is F. If the distance between the two charges remains the same but the magnitude of the charges doubles,
what would be the electrostatic force?

An object is dropped from a tower, 400 ft above the ground. the object's height above ground t seconds after the fall is s(t)equals400 minus 16 t squared. determine the velocity and acceleration of the object the moment it reaches the ground. the velocity of the object the moment it reaches the ground is nothing ft/s.

20) what is a magnetic field? 21) in which direction do magnetic field lines always point? 22) sketch a diagram showing how a plotting compass points around a 23) name two magnetic poles that will: a) attract each other b) repel each other. 24) explain why you can use a compass to navigate. 25) what's an electromagnet? 26) list two ways to increase the strength of an electromagnet. 27) the wire in a simple motor feels a force when a current flows through it. why is this? i need answers to check mine

18. a 6.7 kg object moves with a velocity of 8 m/s. what's its kinetic energy? a. 26.8 j b. 167.5 j c. 53.6 j d. 214.4 j