The enthalpy of fusion of ice is 330,000 J/kg. If I have a 1 kg sample, how much energy is needed to melt all of it?

A. 33,000 J

B. 3,300 J

C. 330,000 J

D. 330 J

Who tried to unify the electromagnetic and gravitational force but was unsuccessful?

A roller coaster has a mass of 650 kg. It sits at the top of a hill with height 78 m. If it drops from this hill, how fast is it going when it reaches the bottom? (Assume there is no air resistance or friction.)

Wha happens to the weight of astronauts when they are in orbit

If velocity is positive, which would most likely yield a negative acceleration? a. A final velocity that is faster than an initial velocity. b. A time that is less than a half hour. c. An initial velocity that is faster than a final velocity. d.

Heavy ions, such as alpha particles, lose kinetic energy as they travel through matter. Consider equation 31.1 or 31.2. Where do heavy ion lose more kinetic energy? a. The rate at which they lose energy does not depend on the speed of the ion. b.

An Archer needs to hit a bull's-eye On Target at eye level of 60 feet away is the Archer fires the arrow from the eye level with a speed of 47 ft/s at an angle of 25 degrees above the horizontal, will the arrow hit the target

What type of wave is a sound wave A. transverse wave B. longitudinal wave C. light wave D. elctromatic wave

Na+/k+-atpase is considered to be an electrogenic pump because

If the period of a wave is 0.05 s, then what is its frequency?

Which of the following descibes the refraction of a wave?