The temperature of a heat engine is 500k some of the heat generated by the engine flows to the surroundings which are at a temp of 125k

By applying a force of 50N, a pulley system can lift a box with a mass of 20 kg. What is the mechanical advantage of the pulley system?

The density of water is 1.00 g/cm3. What is its density in kg/m3?

You are in a spaceship far outside our solar system. Inside your spaceship there is not gravity and no air (and therefore no air resistance). If you toss a ball across the spaceship, how do Newton's laws predict its motion will change as it moves?

Imagine you poor some hot soup into a bowl. You place your hands on the outside of the bowl and feel that the bowl is very warm. How did that heat get from the soup bowl through your hands? A Osmosis B Radiation C Conduction D Convection

3. If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth?

Explain how atoms are aligned in a magnet in terms of the North and South poles.

Which of the following has the largest gravitational potential energy A. a 10kg dog running down the street at 30mph B. a tightrope walker slowly crossing niagara falls C. a 0.02kg bullet moving down the barrel at 800mph D.

Why does the speed of an object change when a force acts on it?

What are factors that would change the position of the wave lengths measured? (There are more than one answer.) a) size of the tube b) tuning fork frequency c) distance between the tuning fork and tube d) room temperature e) area of the tube

This particle is found in the nucleus and adds mass to the nucleus, but changing its number does not change what the element is. This particle is the A. proton. B. photon. C. neutron. D. electron.