If millikan was measuring the charge on an oil droplet with 3 negatively charged electrons on it, what charge would he have measured on the droplet?

How much heat is required to convert 0.3 kg of ice at 0°c to water at the same temperature

When a 5.0kg cart undergoes a 2.2m/s increase in speed, what is the impulse of the cart

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.