Sound is an example of a wave.

Darwin observe different species of an animal in separate Galapagos island which did he observe

Which describes what happens when fuel is ignited in a heat engine? Chemical energy is converted into thermal energy. Thermal energy is converted into solar energy. Solar energy is converted into chemical energy.

When approaching an intersection where the traffic signal is out you should?

Through which does light travel best? a. matter b. empty space c. equally well through matter and empty space

Which statements describe a closed circuit? Check all that apply. Bulbs will shine. Bulbs will not shine. The circuit is incomplete. The circuit is complete. Charges flow. Charges do not flow.

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?