Which of the following statements correctly describes the law of conservation of energy? group of answer choicesa. mass cannot be created but it can be destroyed under extreme pressures. b. mass cannot be conserved during a chemical reaction; a little bit of mass is always lost. c. the mass of a closed system cannot change over time; mass cannot be created nor destroyed. d. when added to a system, energy can destroy mass.
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World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s
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The pressure proportional to the area a- inversely b- directly c- increase d-decrease
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When a bicycle coasts uphill, it moves slower and slower as it climbs. why? a. its kinetic energy is transforming into heat energy. b. its potential energy is transforming into kinetic energy. c. its kinetic energy is transforming into potential energy and heat energy. d. its potential energy is transforming into kinetic energy and heat energy.
Answers: 1
Which of the following statements correctly describes the law of conservation of energy? group of a...
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