A model airplane with mass 0.5 kg hangs from a rubber band with spring constant 45 N/m. How much is the rubber band stretched when the model airplane hangs motionless?

Over the past few decades earth scientists have developed the theory of plate tectonics

Which planet has the highest average surface temperature, and why? a. Mercury, because of its dense carbon dioxide atmosphere. b. Venus, because of its dense carbon dioxide atmosphere. c. Mercury, because it is closest to the Sun. d.

A 2000 kg truck moving at 20 m/s runs into a concrete wall and stops. What is the magnitude the work done on the truck?

For a constant voltage, increasing the resistance will cause the current to decrease

The velocity of any wave can be calculated from its frequency and wavelength. How fast (in meters per second) is a wave moving if its six waves go by in a second and its wavelength is two meters? A. 1/3 B. 3 C. 8 D. 12

What are the steps that are important to take for your safety during an earthquake? a. stay away from walls and windows c. stay away from electrical and gas lines b. get under a desk or table d. all of the above

You have an open air column of length 1.40 m in air at 24.2 °C. What is the frequency of the third harmonic?

Why do we use average force while solving momentum problems? How is net force related to the momentum of the object?

If you had a positive 8 score on the sit-an-reach test you

65 million years ago there was a mass extinction that is best known for killing the dinosaurs. There was also a large deposit of dust that contained substances only found in asteroids.