A 5-kg boulder sits on the edge of a cliff 30 m above the roadway. What is the gravitational potential energy of the boulder on the cliff?

If a 375 watt heater has a current of 5.0 A, what is the resistance of the heating element?

The turning effect of a force is called a moment. Calculate the moment of a force of 3 N acting 0.2 m from a pivot

A ball of mass 0.16 kg is moving forwards at a speed of 0.50 m/s. A second ball of mass 0.10kg is stationary. The first ball strikes the second ball. The second ball moves forwards at a speed of 0.50 m/s.

How Is radar used to determine the speed of a car

1. A disturbance that is caused by vibrations and travels through a medium as a longitudinal wave sound pitch wavelength frequency

What is normal distribution in statistics?

Which of the following water samples would be considered acidic

A linearly-polarized electromagnetic (EM) wave has an electric field with amplitude 1000 V/m. You hold a a linear polarizer in front of it and rotate the polarizer so that all of the EM wave is blocked. You then rotate the polarizer 30 degree.

Let y'=4 x. find all values of r such that y = rx^{2} satisfies the differential equation. if there is more than one correct answer, enter your answers as a comma separated list.

What are the starting materials for nuclear fission