If you are at a train station and a train comes toward you, the train blows its whistle. as the train comes closer the whistle gets louder and as the train gets farther the whistle is quieter. What is this effect called?

Which phase comes after waxing crescent moon

If you put a pencil in a cup of water, it looks as if it is bent and larger in the water. This is because waves A) can reflect off the surface. B) are absorbed instead of reflected. C) bend around a barrier, like light does.

A 0.100 kilogrom apple hangs 1.5 meter above the ground. Ignroing frictional effects, the total mechanical energy of the apple is?

What do astronomers mean by light pollution?

A 34.34 g sample of a substance is initially at 26.7 °C. After absorbing 2205 J of heat, the temperature of the substance is 152.1 °C. What is the specific heat (c) of the substance?

The surface area of the skin of a person who is 70 inches tall and weighs w pounds can be estimated by s (w) equals=342 w superscript 0.425342w0.425 , where s is in square inches.

The train speeds passed Holly at 70 km/h north ward. This spider crawls past lukes foot in the same direction at 30 m/h. What is the velocity of the spider relative to Holly?

What is the name of a particle with no charge in an atom?

What voltage produces a current of 500 amps with a resistance of 50 ohms?

What is cell in electricity?