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SC100 Class 5 Homework Assignment

SC100 Class 5 Homework Assignment. 1. Which of the following is a rate? a. joule b. foot-pound c. power d. energy e. newton. SC100 Unit 4a Homework Assignment.

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SC100 Class 5 Homework Assignment

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  1. SC100 Class 5 Homework Assignment • 1. Which of the following is a rate? • a. joule • b. foot-pound • c. power • d. energy • e. newton

  2. SC100 Unit 4a Homework Assignment • 2. The watt number on a light bulb tells the amount of energy the light bulb is using in joules per second. Which of the following light bulbs is using the most energy? • a. 100-watt bulb that burns for twenty minutes • b. 75-watt bulb that burns for thirty minutes • c. 60-watt bulb that burns for one hour • d. 40-watt bulb that burns for two hours • e. 25-watt bulb left on for three hours

  3. SC100 Unit 4a Homework Assignment • 3. A stalled car is pushed to the top of a hill, allowed to roll down the hill and started by “clutch-popping.” At which point did the car have the greatest amount of potential gravitational energy? • a. at the bottom of the hill • b. at the top of the hill • c. when restarted with the clutch • d. being pushed to the top of the hill • e. as it was rolling down the hill

  4. SC100 Unit 4a Homework Assignment • 4. James Watt designed experiments in horsepower to • a. assist miners in removing ore. • b. calculate the velocity of a water pump. • c. quantify the energy generated by a horse in mines. • d. invent the steam engine. • e. all of the above

  5. SC100 Unit 4a Homework Assignment • 5. When a meteorite hits the Earth, heat is generated. Which of the following statements best describes this process? • a. Gravitational potential energy is converted into heat. • b. Electrical potential energy is converted into heat. • c. Chemical energy is converted into heat. • d. Magnetic energy is converted into heat. • e. Elastic potential energy is converted into heat.

  6. SC100 Unit 4a Homework Assignment • 6. Work is the product of force exerted and distance travelled. True or False? • 7. All work stops when a system runs out of energy. True or False?

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