The half-life of carbon-14 is 5,730. What fraction of carbon-14 would remain after 11, 460 years?

What is the wavelength of sound which has frequency 100Hz and velocity 250m/s.

What force (in newtons) is required to accelerate a body with a mass of 32 kilograms at a rate of 12 m/s2?

What was Pangaea? When did it form and when did it break apart? It was A) a large ocean basin that opened in the Triassic and closed in the Paleocene B) the supercontinent that formed in the late Paleozoic and broke apart in Mesozoic C) the huge

Describe how acceleration and velocity are related and specify if these are scalar or vector quantities

You strike a tuning fork. explain how the fork produces sound waves that you can hear.

Give the definition for diffusion. (A) gas molecules mix unequally average distance between collisions (B) gas molecules escape from a container into a vacuum through a small hole (C) gas molecules mix equally (D) gas molecules spread out in a

As resistance goes up, what happens to the current?

1. A 0.828-nm photon collides with a stationary electron. After the collision, the electron moves forward and the photon recoils backwards. a) Find the momentum of the electron. b) Find the kinetic energy of the electron.

When are you most aware of your motion in a moving vehicle: when it is moving steadily in a straight line or when it is accelerating?

The force of gravity on a person or object on the surface of a planet is called?