Strong winds, heavy rains, storm surges

Which of these is NOT a vector quantity?

a. momentum b. impulse c. displacement d. speed e. velocity

Why is the nightside of Mercury so much colder (relatively speaking) than the dayside?

A. Mercury is in synchronous rotation, so the far side of Mercury never sees the Sun. B. Mercury's lack of an atmosphere keeps the planet from retaining its surface heat. C. Mercury's small size lets it cool quickly. D. Mercury's magnetic field acts like a blanket on the planet's dayside.

If we double only the amplitude of a vibrating ideal mass-and-spring system, the mechanical energy of the system

A) increases by a factor of . B) increases by a factor of 2. C) increases by a factor of 3. D) increases by a factor of 4. E) does not change.

At the end of the Kelvin-Helmholtz contraction a star is hundreds of times brighter than it will be as a main sequence star

Indicate whether the statement is true or false