*Question*
Answer the following question given this paragraph: Pendulums are in common usage. Some have crucial uses, such as in clocks; some are for fun, such as a child's swing; and some are just there, such as the sinker on a fishing line. For small displacements, a pendulum is a simple harmonic oscillator. A simple pendulum is defined to have an object that has a small mass, also known as the pendulum bob, which is suspended from a light wire or string, such as shown in Figure 16.14. Exploring the simple pendulum a bit further, we can discover the conditions under which it performs simple harmonic motion, and we can derive an interesting expression for its period. Q: What is the common name for a simple harmonic oscillator, which basically consists of a small object suspended on a wire or string? Choices: - yo-yo - metronome - pendant - pendulum A:
**Answer**
pendulum

*Question*
Answer the following question given this paragraph: An electric generator is a device that changes kinetic energy to electrical energy through electromagnetic induction. A simple diagram of an electric generator is shown in Figure below . In a generator, some form of energy is applied to turn a shaft. This causes a coil of wire to rotate between opposite poles of a magnet. Because the coil is rotating in a magnetic field, electric current is generated in the wire. If the diagram in Figure below looks familiar to you, that's because a generator is an electric motor in reverse. Look back at the electric motor in Figure above . If you were to mechanically turn the shaft of the motor (instead of using electromagnetism to turn it), the motor would generate electricity just like an electric generator. You can learn how to make a very simple electric generator by watching the video at the URL below. Making your own generator will help you understand how a generator works. Q: What is a device that changes kinetic energy to electrical energy through electromagnetic induction? Choices: - a battery - a windmill - a diesel engine - an electric generator A:
**Answer**
an electric generator

*Question*
Answer the following question given this paragraph: Most of the pathogens that cause STIs enter the body through mucous membranes of the reproductive organs. All sexual behaviors that involve contact between mucous membranes put a person at risk for infection. This includes vaginal, anal, and oral sexual behaviors. Many STIs can also be transmitted through body fluids such as blood, semen, and breast milk. Therefore, behaviors such as sharing injection or tattoo needles is another way these STIs can spread. Q: Most of the pathogens that cause stis enter the body through mucous membranes of which organs? Choices: - eyes - kidneys - stomach - reproductive organs A:
**Answer**
reproductive organs

*Question*
Answer the following question given this paragraph: Air pressure affects how high a cake rises when it bakes. Directions for cake mixes often have special high altitude instructions, like those on the label below. Explain why. Q: What affects how high a cake rises when it bakes? Choices: - air currents - air movement - current pressure - air pressure A:
**Answer**
air pressure