Physics, 30.08.2021 19:20, FireFlight
Liquid water is heated until it boils and becomes water vapor. Which statement is true about the water?
A.
Neither the physical properties nor the chemical properties have changed.
B.
The physical properties have changed, but the chemical properties have not.
C.
Both the physical properties and the chemical properties have changed.
D.
The chemical properties have changed, but the physical properties have not.
Answers: 3
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For a particular reaction, ? h = -144.6 kj and ? s = -301.2 j/k. calculate ? g for this reaction at 298 k.
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Why is alternating current more effective at longâdistance travel than direct current? a. the power lines are made out of conductors. b. transformers increase or decrease voltage as needed. c. the ac generator is more efficient. d. ac has lower voltage than dc.
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A1000-kg weather rocket is launched straight up. the rocket motor provides a constant acceleration for 16-s, then the motor stops. the rocket altitude 20-s after launch is 510-m. you can ignore any effects of air resistance. a. what was the rocketâs acceleration during the first 16-s? b. what is the rocketâs speed as it passes through a cloud 5100-m above the ground?
Answers: 1
Liquid water is heated until it boils and becomes water vapor. Which statement is true about the wat...
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