A lorry pulls forward after initially being stationary, it takes the lorry 80m to reach a speed of 5m/s, calculate the lorry's acceleration.

Road users moving into your lane, brake lights, and abrupt changes in road surface are a. rare at night b. indicators of potential hazards c. not worth worrying about before you reach them d. no problem for experienced drivers

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?

If you put a helium-filled balloon in the refrigerator, what will happen?