Question: Answer the following question given this paragraph: Friction is the force that resists motion. In most beginning physics classes, friction is ignored. Concepts can be understood and calculations made assuming friction to be nonexistent. Whenever physics intersects with the real world, however, friction must be taken into account. Friction exists between two touching surfaces because even the smoothest looking surface is quite rough on a microscopic scale. Q: What type of force exists between two touching surfaces? Choices: - opposing - centrifugal - tension - friction A:
Answer: friction

Question: Answer the following question given this paragraph: Carboxylic acids have high boiling points compared to other substances of comparable molar mass. Boiling points increase with molar mass. Q: Boiling points increase with which kind of mass? Choices: - lipid mass - universal mass - protons mass - molar mass A:
Answer: molar mass

Question: Answer the following question given this paragraph: Power plants are where electric power originates. They have electric generators that generate electric current through electromagnetic induction. Q: Where does electric power originate? Choices: - the Sun - magnets - coal mines - power plants A:
Answer:
power plants