Why might farmer plant purebred crop seeds?

1. What is the arrangement of the outer planets? 2. What effect does their placement have the planets?

How many joules are in 148 calories? (1 cal = 4.18 J) A. 6.61 J B. 35.4 J C. 148 J D. 619 J.

Which speed (s) is/are below the sound barrier in air? A. 257 m/s B. 1,030 m/s C. 10 m/s

What happens when new information from an experiment produces results that partially support a theory?

The rate at which velocity is changing at a given instant is described by -instantaneous acceleration -average speed -constant speed -vector addition

The portion of a light ray that falls on a surface is a/an

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?