Today earths magnetic field is losing approximately 7 percent of its strength every 100 years. If the strength of earth magnetic field at its surface is 0.5 gauss today, what will it be 100 years from now?

According to the doppler effect, what appears to happen when a light source moves closer to an observer? The waves stretch and frequency appears to decrease. The waves stretch and frequency appears to increase.

What device is used to measure air pressure? 1) thermometer 2) anemometer 3) barometer 4) hygrometer

10_ south of west is a way measure of the direction between south and west.

1. The sun and other stars produce visible light by a. fluorescence. b. luminescence. c. incandescence. d. electroluminescence.

You add 50 mL of water at 20°C to 200 mL of water at 70°C. What is the most likely final temperature of the mixture?

when we examine the structures of the other terrestrial planets in our solar system, we see that their structure is similar to Earth's. Why do you think this is the case?

An ant is crawling along a straight wire, which we shall call the x axis, from A to B to C to D

How does a very heavy object resist sliding sideways when you push hard on it?

A go-cart traveled at 200 meters in 18 seconds. what was the average speed of the go cart?

A cartoon plane with four engines can accelerate at 8.9 meters per second squared