If a lever system has an output force (load) of 20 kg and an input force (Effort) of 100 kg, the mechanical advantage of this lever is:

A. 2000

B. 0.2

C. 0.5

D. 5

In the phenomenon known as the Doppler Effect, electrons are ejected when light shines on certain substances. true or false

Two identical cows fell into a muddy hole. One fell on its side and the other on its feet. Which one sunk furthest into the mud and explain your answer

Does potential energy increase with temperature?

A circuit is built based on this circuit diagram. What is the equivalent resistance of the circuit?

Gauss's law is usualy written as: ∫Φ_E = E * dA = qencl / ε0 what does qencl refers in Guass's law? O the net charge inside the closed surface O the charge residing on insulators inside the closed surface O all the charge in the physical system O

A rotating water pump works by taking water in at one side of a rotating wheel, and expelling it from the other side. If a pump with a radius of 0.120 m starts from rest and accelerates at 30.

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