Sound cannot travel through a vacuum. Explain why.

How can you produce more power then and excavator?

Type the correct answer in the box. In the fishbowl, the glass, water, rocks, and plastic plants are in thermal equilibrium. This situation means the temperature of the rocks is °F.

An unstable particle, initially at rest, decays into a proton (rest energy 938.3 MeV) and a negative pion (rest energy 139.5 MeV). A uniform magnetic field of 0.250 T exists perpendicular to the velocities of the created particles.

A parallel-plate air capacitor has a capacitance of 920 pF. The charge on each plate is 3.90 μC. What is the potential difference between the plates? Express your answer with the appropriate units.

Rita throws a ball straight up into the air and catches it at the same position from which she threw it. The ball has 18 J of mechanical energy when it leaves her hand.

Why is energy efficiency important to society's need to be efficient with energy usage?

A wave has a wavelength of 9 mm and a frequency of 14 hertz. What is its speed?

Where would you weigh the most? Mars Pluto Earth The Sun The moon

A large power plant generates electricity at 12.0 kV. Its old transformer once converted the voltage to 425 kV.

Match the example to the type of equipment category it fits best in. A Gym bag, workout clothes, hygiene essentials, proper shoes, water, ipod. B Hockey Stick Baseball Glove. Basketball. Pads. Helmet.