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1) Describe the energy changes that accompany chemical and physical changes
2) E
1) Describe the energy changes that accompany chemical and physical changes
2) Explain the Law of Conservation of Energy in your own words. Give an example of a system where energy is conserved. Be sure to discuss why energy is conserved in this system.
3) In a simulation on Earth, an astronaut in his space suit climbs up a vertical ladder. On the moon, the same astronaut makes the same climb. In which case does the gravitational potential energy of the astronaut change by a greater amount? Account for your answer.
4) How does the conservation of mass relate to the conservation of energy? Give an example.
5) Describe how lightning is produced.
6) Discuss the relationships between the variables in Coulomb’s Law equation. 7) A parallel circuit consisting of four branches is connected to a battery. Explain how the amount of current that flows out of the battery is related to the amount of current in the branches of the circuit.
8) Discuss the relationship between energy, power, voltage, current, and resistance in a circuit.
9) Explain the function of a coil, resistor, and capacitor in a circuit.
10) What is magnetism?
11) Describe what happens when you move two unlike magnetic poles closer together. Draw a diagram to illustrate your answer.
12) Describe how a compass needle moves when it is placed in a magnetic field.
13) Predict how the properties of a bar magnet would change if it were broken in half.
14) Use the magnetic domain model to explain why a magnet sticks to a refrigerator door.
15) Describe two ways you could change the strength of the magnetic field produced by an electromagnet.
16) Explain why it is necessary to continually reverse the direction of current flow in the coil of an electric motor.
17) Compare and contrast a generator with an electric motor.
18)Explain why the output voltage from a transformer is zero if a direct current flows through the primary coil.
19) Explain why electric current produced by power plants is transmitted as alternating current
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