Where does sea-floor spreading take place?

a. convergent boundaries

c. oceanic volcanoes

b. transform boundaries

d. mid-ocean ridges

Giant and supergiant stars are rare because

What is the frequency of a water wave that has a wavelength of 0.5 m and a speed of 4.0 m/s?

A constant force is applied to an object, causing the object to accelerate at 8.0 m/s2. What will the acceleration be if a. The force is doubled? b. The object's mass is doubled? c. The force and the object's mass are both doubled?

The 400-kg satellite S traveling at 7 km/s is hit by a 1-kg meteor M. The meteor is embedded in the satellite by the impact.

An atomic nucleus is composed of A) protons. B) protons and neutrons. C) protons and electrons. Eliminate D) protons, neutrons, and electrons.

What causes ice to melt and water to boil

A block of mass 3.5 kg slides down a frictionless inclined plane of length 6.4 m that makes an angle of 30 degrees with the horizontal. if the block is released from rest at the top of the incline, what is its speed at the bottom

What is the wavelength of an earthquake wave if it has a speed of 5 km/s and a frequency of 10 Hz?

The gamma ray released by each decay carries 140kev of energy. find the total energy e released by decays in the 2 hours.

Think of the last five things you read. Now think of a type of reading you havent done recenty have never read. What kind of pattern do you see in your reading? What is your favorite type of reading and your least favorite type of reading?