Answer the following question given this paragraph: Power is the rate that energy is released. The units for power are watts (W), which equal joules per second . For example, a 60 W light bulb transforms 60 joules of electrical energy into light and heat energy every second. Q: The rate that energy is released is known as Choices: - flow - heat - pressure - power A:
power
Answer the following question given this paragraph: Check Your Understanding Define nodes and antinodes. Solution Nodes are areas of wave interference where there is no motion. Antinodes are areas of wave interference where the motion is at its maximum point. Q: Solution nodes and antinodes are both areas of wave interference, but they differ in the presence of what condition? Choices: - radiation - gravity - speed - motion A:
motion
Q: Answer the following question given this paragraph: Hemoglobin is a compound in the class of compounds called proteins. Proteins are one of four classes of biochemical compounds, which are compounds in living things. (The other three classes are carbohydrates, lipids, and nucleic acids. ) Proteins contain carbon, hydrogen, oxygen, nitrogen, and sulfur. Protein molecules consist of one or more chains of small molecules called amino acids. Q: How many classes of biochemical compounds are there? Choices: - one - five - three - four A:
A: four
Question: Answer the following question given this paragraph: Q: Like animals, cyanobacteria possess what kind of biological rhythm? Choices: - brain rhythm - music rhythm - variable rhythm - circadian rhythm A:
Answer: circadian rhythm
*Question*
Answer the following question given this paragraph: Resistance is the property that determines the amount of current flow through a particular material. Q: What is the property that determines the amount of current flow through a particular material? Choices: - pressure - surface tension - demand - resistance A:
**Answer**
resistance
Q: Answer the following question given this paragraph: Sometimes muscles and tendons get injured when a person starts doing an activity before they have warmed up properly. A warm up is a slow increase in the intensity of a physical activity that prepares muscles for an activity. Warming up increases the blood flow to the muscles and increases the heart rate. Warmed-up muscles and tendons are less likely to get injured. For example, before running or playing soccer, a person might jog slowly to warm muscles and increase their heart rate. Even elite athletes need to warm up ( Figure below ). Q: Warming up your body before a workout does what to the blood flow? Choices: - reduces it - stops it - minimizes it - increases it A:
A: increases it