When galaxies move away from us they appear to have a "red shift" in color. Explain why this happens.

Scientists are testing a new drug, which they think might allow people to memorize large amounts of information. Group A is taking a sugar pill. Group B is taking the new drug. Both groups are 25-35 years old and are not taking any other medicine.

A bus resists changes in its motion. Why is this? A. It has a large amount of inertia. B. It has a very high acceleration C. It has a strong force acting on it. D. It has a very low mass.

The magnetic field of the earth is believed responsible for which of the following?

What types of surfaces would result in less friction? What type of surfaces would result in greater friction?

Is the state of maintaining a stable internal environment despite changing external conditions.

A circuit is built based on the circuit diagram shown. A diagram of a closed circuit with a power source on the left labeled 60 V. There are 3 resistors in parallel, separate paths, connected to it labeled 40 Ohms, 50 Ohms and 30 Ohms.

After harvesting their main crops, such as corn and wheat, many farmers plant a second crop called a cover crop. This cover crop grows during the fall and winter and is then plowed over in the spring. What is the main purpose of a cover crop? A.

A light wave is traveling straight up out of the ocean then moves out into the air how do you expect the movement of the light wave to change the light wave will

To verify that this expression for (vf) α has the correct units of velocity, you need to perform some unit analysis. begin by finding the equivalent of a volt in terms of basic si units.

Which of the following best describes transverse waves