Which type of electroscope you will prefer for decting and identifying charge and why?

When the velocity of an object is doubled, by what factor is its momentum changed? by what factor is its kinetic energy changed? a) the momentum is zero. b) the momentum is not zero. c) difficult to say.

Is the time in tennessee the same as florida

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up