Answer the following question given this paragraph: To prepare coal for use, the coal is first crushed into powder and burned in a furnace. Like other fuels, coal releases most of its energy as heat when it burns. The heat from the burning coal is used to boil water. This makes steam. The steam spins turbines, which creates electricity. Q: When does coal release most of its energy? Choices: - when forming - when compressed - when falling - when burning A:
when burning
Answer the following question given this paragraph: p = F nett, we can see how the change in momentum equals the average net external force multiplied by the time this force acts. The quantity F net t is given the name impulse. Impulse is the same as the change in momentum. Impulse: Change in Momentum Change in momentum equals the average net external force multiplied by the time this force acts. Q: Change in what equals the average net external force multiplied by the time this force acts? Choices: - lag - height - rate - momentum A:
momentum
Q: Answer the following question given this paragraph: The Richter scale is a logarithmic scale that measures the largest jolt of energy released by an earthquake. Q: What is the logarithmic scale that measures the largest jolt of energy released by an earthquake called? Choices: - Shake scale - Geiger counter - tremor scale - richter scale A:
A: richter scale
Question: Answer the following question given this paragraph: Arthropod at http://animal. discovery. com/animal-facts/arthropod-info. htm. Q: A bicycle is an example of a compound machine made of many what? Choices: - linked machines - useful machines - interchangeable machines - simple machines A:
Answer: simple machines
*Question*
Answer the following question given this paragraph: The cell wall is located outside the cell membrane. It consists mainly of cellulose and may also contain lignin , which makes it more rigid. The cell wall shapes, supports, and protects the cell. It prevents the cell from absorbing too much water and bursting. It also keeps large, damaging molecules out of the cell. Q: What shapes, supports, and protects the cell? Choices: - the epithelium - the mesothelium - the chloroplast - the cell wall A:
**Answer**
the cell wall
*Question*
Answer the following question given this paragraph: Chromatography involves solvent separation on a solid medium. Q: Which process involves solvent separation on a solid medium? Choices: - substration - resonance - affinity - chromatography A:
**Answer**
chromatography