A pulley system used to lift car tires has a mechanical advantage of 8.1. If

you pull on the pulley with a force of 540 N, how much force does the pulley

exert on the tire?

One function of the skeletal system is to protect the internal organs. true/false

Why is it very important that only one variable be changed in a n experiment

The Doppler effect is an effect produced by a moving source of sound or electromagnetic waves due to the relative motion of a source or a receiver.

Paragraph about cell wall

If your goal is to improve your personal relationships with your friends at school, which category would it fall into? Physical Emotional Social Academic

They are generally thought to be blank naturally occurring emotions that are present from birth

If an aircraft is loaded 90 pounds over maximum certificated gross weight and fuel (gasoline) is drained to bring the aircraft weight within limits, how much fuel should be drained?

3. Shortwave radio is broadcast between 3.50 and 29.7 MHz, To what range of wavelengths does this correspond? Why do you suppose this part of the spectrum is called shortwave radio?

How does a star's temperature change as the star ages from a main sequence star to a red giant and from a red giant to a white dwarf?

What factors in the atmosphere seem to have the greatest effect in the amount of radiation received from the sun?