Acamera flash, which throws a parallel beam of light, has a mirror behind the light bulb. what kind of mirror is it likely to be?

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9

Asmall 12.00g plastic ball is suspended by a string in a uniform, horizontal electric field with a magnitude of 10^3 n/c. if the ball is in equilibrium when the string makes a 30 ° angle with the vertical, what is the net charge on the ball?