What is the difference in the charges on a balloon rubbed in your hair and a glass rod rubbed with silk?

A juggler tosses balls vertically to height H. To what height must they be tossed if they are to spend twice as much time in the air?

What is the kinetic energy of a 2,500-kilogram boat moving at 7.2 m/sec? _ Joules

Which of the following best describes the gas trapped in a sealed balloon? A) The particles move slowly. B) The particles do not often collide with one another. C) The movement of the gas particles keeps the balloon inflated.

A toaster can be considered to be a heat engine that does no work. Heat flows through the toaster coils without being transformed into mechanical energy. What is the thermal effeciency of this example of a heat engine? a) 0.50 b) 1 c) 0 d) - 1

When the temperature is constant, the volume of a gas will decrease as the pressure decreases. true or false?

Why is chopping carrots a physical change?

What value would you divide 50 by in order to get grams to kilograms

Organized elements into four groups based on properties

Microwave, radio signal, light, earthquake which does not belong

A 9.0-v battery is connected to a bulb whose resistance is 2.5 ω. part a how many electrons leave the battery per minute?