Answered: . Which order of magnitude does the SI…

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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1. Which order of magnitude does the SI prefix “mega-“ (M) represent? A. 103 B. 106 C. 109 D. 1012 2. 2.34 kW is equal to A. 2 340 W. B. 23 400 W. C. 234 000 W. D. 2 340 000 W. 3. How many seconds (s) are there in 1 hour 20 minutes? A. 80 s B. 380 s C. 4800 s D. 87 600 s 4. It takes a kettle 5 minutes to transfer 540 kJ of energy to boil some water. What is the power of the kettle? A. 1080 W B. 1800 W C. 9000 W D. 108 000 W 5. A heater of power 1200 W is switched on for an hour and a half. How much heat is given out from the heater? A. 2.16 kJ B. 6.48 kJ C. 2.16 MJ D. 6.48 MJ 6. An immersion heater has a power of 1500 W. How long does it take to supply 3 000 000 J of heat? A. 2 minutes B. 5 minutes C. 20 minutes D. 33 minutes 7. An immersion heater is connected to power supply via a joulemeter. The figure below shows the variation of the reading of the joulemeter with time. Estimate the power of the immersion heater. A. 582 W B. 723 W C. 34 900 W D. 43 400 W 8. An immersion heater is connected to the power supply via a joulemeter. Which of the following quantities is measured by the joulemeter? A. Temperature of the heater B. Heat given off by the heater C. Internal energy of the heater D. Electrical energy supplied to the heater 9. Joule per second (J s−1 ) is a unit of A. time. B. power. C. energy. D. temperature. 10. Which of the following are units of energy? (1) joule (J) (2) watt-second (W s) (3) kilowatt-hour (kW h) A. (1) and (2) only B. (1) and (3) only C. (2) and (3) only D. (1), (2) and (3) 11. 100 MJ is approximately equal to A. 13.6 kW h. B. 16.7 kW h. C. 27.8 kW h. D. 36.0 kW h.

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