During a total lunar eclipse, the moon

a. moves into earth's umbra.

b. moves outside earth's shadow.

c. moves into earth's penumbra.

d. moves into the sun's umbra.

If the cost of gasoline for automobiles doubles, what changes might occur in the design of automobiles

Describe the dynamic equilibrium that exists between the two water tanks at right.

An electron is held at a distance from a stationary, positively charged object. If the electron is released, what energy change will take place? A. Electric potential energy into kinetic energy ) B. Kinetic energy into electric potential energy C.

The Big Bang is thought to have occurred __billon years ago

If a person weighs 90 N on Earth, and the gravitational acceleration due to Jupiter's gravity is 25.98 m/s2, how much would the person weigh on Jupiter? A. 3.46 N B. 238.59 N C. 882.00 N D. 2338.20 N

A world-class sprinter can burst out of the blocks to essentially top speed (of about 11.5 m/s) in the first 15.0 m of the race. what is the average acceleration of this sprinter, and how long does it take her to reach that speed?

How are primary and secondary succession similar and how are they different?

What relates the net force exerted on an object to its mass and acceleration?

I'm a wave, the medium moves parallel to the direction that the wave travels

What is the wavelength of a wave that has a velocity of 32 m/s and a frequency of 60.6 Hz?