List two reasons why the limestone blocks of the pyramids were so difficult to push across land.

You want to pull a 10 kg block up a frictionless ramp with an acceleration of 2.5 m/s2. What force do you need to apply along on the block along the direction of the ramp's surface if the ramp is angled at 30 degrees above the horizontal?

As the wavelength of electromagnetic radiation increases, what happens to the frequency?

Energy lost from friction when forces are applied most often shows up as

Explain the difference between si base units and derived units. give an example of each

A single atom of an element has 21 neutrons, 20 electrons, and 20 protons. Which element is it?

What is the maximum angle a light ray can make with the wall of the core if it is to remain inside the fiber?

Heat transfer within a fluid takes place by a. convection currents. b. radiation. c. conduction. d. density. I think it's A

Compare and contrast how wind and glaciers abrade rock

An object of mass 10 kg is accelerated upward at 2 m/s squared. what force is required?

How much work does a supermarket checkout attendant do on a can of soup he pushes 0.600 m horizontally with a force of 5.00 N? Express your answer in joules and kilocalories.