A train travels 81 kilometers in 3 hours, and then 63 kilometers in 4 hours. What is its average speed?

An elevator exerts a force of 8000 N to lift the passengers 15 m. How much work is the elevator doing? The elevator is doing J of work.

3 examples of crystals

Find the work w1 done on the block by the force of magnitude f1 = 95.0 n as the block moves from xi = - 5.00 cm to xf = 4.00 cm.

How do we find the acceleration from a velocity vs. time graph

What does parris tell Abigail he saw in the woods?

Which describes a property shared by ultraviolet light and X-rays? A They are both transverse waves. B They share the same wavelength. C They contain less energy than visible light. D They both require a medium to travel through.

What is the potential energy called that is associated with objects that can be stretched

Which of the following is not a current use of radioisotopes? medical diagnosis sterilization of equipment detection of leaks in building structures light fixtures

A Blu-ray disc is approximately 11 centimeters in diameter. The drive motor of a Blu-ray player is able to rotate up to 10,000 revolutions per minute. (a) Find the maximum angular speed (in radians per second) of a Blu-ray disc as it rotates

A body has translatory motion if it moves along a