If the frequency of a sound wave is 990 Hz, calculate its wavelength.

A 1100 kg car pushes a 1800 kg truck that has a dead battery. When the driver steps on the accelerator, the drive wheels of the car push against the ground with a force of 4500 N.

The planets stay in orbit due to A. kinetics B. friction C. gravity D. mass

How do white dwarfs compare with supergiants, in terms of temperature and luminosity? white dwarfs are cooler and have higher luminosity than supergiants. white dwarfs are cooler and have lower luminosity than supergiants.

Two children start at one end of a street, the origin, run to the other end, then head back. On the way back Joan is ahead of Mike. Which statement is correct about the distances run and the displacements from the origin? a.

A body of mass m is suspended from a spring with spring constant k in configuration (a) and the spring is stretched 0.1m.

A hot spot is an area where material from deep within the mantle rises and melts through the crust above it. True or False

Which suspect is one who wrote the suicide note? Question 1 options: George Roberts Karen Roberts Mary Roberts John Huddleston

What happens when an atom is exposed to an energy source such as electricity? The electrons may jump to a higher energy level. The electrons move closer to the nucleus. The electrons may move to a lower energy level.

A coin completes 18 spins in 12 seconds. The centripetal acceleration of the edge of the coin is 2.2 m/s2. The radius of the coin is m.

A 70 kg boy is sitting 3 m from the ground in a tree. what is his gravitational potential energy