What happens to the velocity of a sound wave in air if the temperature of the air increases?

A velocity increases

B. velocity does not change

C. velocity decreases

D. velocity drops to zero

Which will change if you turn up a radios volume

Why is light refracted when it passes from air to water? A) light slows down when it enters water B) Forces from the water molecules bend the light C) the motion of the water bends the light D) the water is often cooler

What is the element for the mass of 59?

Which example represents the impact of religion on culture in the United States? A. children receiving counseling at school B. farmers celebrating a rich harvest C. teachers raising an informed citizenry D. banks and offices closing on Sunday

the speed of a train is decreased in a uniform rate from 96 km/h to 48km/h through a distance of 800m. calculate the distance covered by the train from the moment of using the brakes till it stops if it was moving with the same acceleration

A swimmer jumps from a waterfall thats is 8.5 m high from the lake below. How fast must he run horizontally to dive 2.5m away from the base of the waterfall?

What happens (as far as energy goes) when a molecule of gas strikes the wall of a container?

The boom of a fire truck raises a fireman (and his equipment - total weight 280 lbf) 60 ft into the air to fight a building fire.

Two masses are separated by 1 m. suppose the masses are moved so they are 2 m apart how will the gravitational force change

Bob rubs a piece of fur on a hand rubber rod, giving the rod a negative charge. what happens?