A pulley system has an efficiency of 65.1%. If you perform 350 J of work, how much useful work does the pulley perform?

newtons 3rd law of motion states that "every action has an equal and oppisite reaction" A golf ball was hit with a force of 200 N forward. Explain how this relates to Newton's 3rd law of motion.

The scientists tested a hypothesis on running in the rain performed only one controlled experiment that supported their hypothesis. Can their supported hypothesis be called a theory?

If a Ferrari with an initial velocity of 10 m/s accelerates at a rate of 50 m/s squared for three seconds what will its final velocity be?

What is the primary cause for the change in seasons?

How electric current is able to flow.

A 111.6 g sample of iron was heated from 0°C to 20°C. It absorbed 1004 J of energy. What is the specific heat capacity of iron?

A car is driving towards a brick wall at a constant velocity (don't try this at home!) and the driver honks the horn of the car. the sound of the horn reflects from the wall and the echo is heard by the driver.

Mass number of an atom with 11 protons

Which of the following elements is the most reactive? Beryllium Calcium Magnesium Barium

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.