A 45.0-kg sample of ice is at 0.00°C. How much heat is needed to melt it? For water, Lf=334 kJ/kg and Lv=2257 kJ/kg

A. 4.10 x 10^6 kj

B. 0.00 kj

C. 1.02 x 10^5 kj

D. 1.50 x 10 ^4 kj

What happens to a gas when its temperature decreases? A) gas becomes a plasma B) molecules move more slowly C) energy of the particles increases D) atoms in the gas are destroyed

3. Infiltration is the process by which rainwater becomes A. river water. B. groundwater. C. saltwater. D. ocean water.

Which of the following elements is an alkali metal? Select one: a. magnesium b. sodium c. calcium d. mercury

Which term refers to the more overt form of resistance through a movement such as revolution or genocide or through nonviolent protest?

Rank the temperatures from highest to lowest O K O°F O°C is it C°, F°, K

Do Brain cells act and look like skin cells? Why or why not?

A taxi hurries for 1 3/4 hours with a constant speed of 84 mph and then for another 1 hour 45 minutes with a constant speed of 24 mph. what is its average speed for the total trip?

A carbon atom has how many valence electrons?

X-rays UV light waves Sound waves Earthquake waves. All of these have which characteristic in common?

V=345m/s, 7210Hz, X=?