Why do you think the waves in front of the car have shorter wavelength than the Waves behind the car?

Where does the energy of water at the top of the waterfall come from?

A moving object always has energy in its?

Find c for 455 grams of metal that gives off 1638 J while changing temperature by 6C.

A cosmic-ray proton in interstellar space has an energy of 59 MeV and executes a circular orbit with a radius equal to that of Mercury's orbit (5.8 * 1010 m) around the Sun.

What fraction of a piece of concrete will be submerged when it floats in mercury? the density of concrete is 2.3*103kg/m3 and density of mercury is 13.6*103kg/m3?

Cardiovascular exercise can

Kathy tests her new sports car by racing with Stan, an experienced racer. Both start from rest, but Kathy leaves the starting line 1.00 s after Stan does. Stan moves with a constant acceleration of 3.1 m/s2 while Kathy maintains an acceleration of 4.

A 0.0010-kg pellet is fired at a speed of 50.0m/s at a motionless 0.35-kg piece of balsa wood. When the pellet hits the wood, it sticks in the wood and they slide off together. With what speed do they slide?

Jim measures the count rate of a sample of americium-241 as 120cpm. Roughly how long would it take for the count rate to fall below 4 cpm. Show your working

Explain and give an example of newtons 3rd law of motion