How will the amount of thermal energy required to change each substance from a liquid to a gas differ?

a) water and mercury will require the same amount of energy to change from liquid to gas.
b) mercury will require a greater amount of energy to change from liquid to gas than water.
c) neither water nor mercury will require any energy to change from liquid to gas as long as they are each at their boiling temperatures.
d) water will require a greater amount of energy to change from liquid to gas than mercury.

The electric field direction is defined by the direction of the force felt by (select one of the following answers): 1. a negative charge. 2. a positive charge. 3. both positive and negative charges.

Aflask with vinegar in it has a mass of 160 grams. a balloon with baking soda in it has a mass of 40 grams. the balloon is attached to the flask to seal the opening and the vinegar and baking soda mixes. the balloon inflates to a large volume. what will the total mass of the balloon and flask be after the balloon inflates? explain. a) less than 200 grams because the solid baking soda disappears. b) 200 grams, because all the atoms remain in the balloon or flask. c) more than 200 grams because the size of the balloon is so much larger. d) less than 200 grams because gases such as the one in the balloon are lighter than solids and liquids.

What energy transformations occur each time the skateboarder rolls up the ramp?