Bill does 1500 j of work on a leaver, which is a simple machine. The lever does 1350 j of work on a stone. What is the efficiency of the leaver?

A 70 kg man is walking at a speed of 2 m/s. What is his Kinetic Energy?

The k of a material is defined as the resistance of the wire made from that material which is? long, and in diameter.

In terms of saturation (unsaturated, saturated, super-saturated). How would you classify the following? 1. A NaCl solution with a concentration of 50g/100mL of water at 40°C 2. A sugar solution with a concentration of 200g/100mL of water at 40°C 3.

Us your understanding of asexual reproduction to explain why is it important that organisms reproduce in a variety of ways.

Which is denser ice at 0 degrees C or water at 4 degrees C

How does increasing the amount of charge on an object affect the electric force it exerts on another charged object?

A diffraction grating is illuminated simultaneously with red light of wavelength 670 nm and light of an unknown wavelength. The fifth-order maximum of the unknown wavelength exactly overlaps the third-order maximum of the red light.

Four soccer players are running down the field at the same speed. Player 1 weighs 145 lbs and is running toward the north goal, player 2 weighs 175 lbs and is running toward the south goal, player 3 weighs 155 lbs and is running toward the south

Pure water has a hydrogen ion concentration of 1 x 10 (-7) M and a ph of 7. A student measures a basic solution and finds that it has a hydrogen ion (H+) concentration of 1 x 10 (-3).

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