Physics, 19.07.2019 04:30 abbygriffin2693
Why does it matter? heat & changes in temperature wrap-up question 1: electrical power in southern california costs about 18 cents per kwh. if you have to heat up 1 l of water to cook some pasta, how much does it cost you to bring the water from 22 c up to 100 c? (useful conversions: 1 ml -1g of water, and 1 kwh-3,600,000 j) how would the cost compare to the same temperature change of the same mass of oil instead? wrap-up question 2: how does the thermal conductivity of human skin compare to that of metal? use your results from part 3 and ideas from part 4 to justify your answer student wrap-up worksheet | page1 lab #9 question 3: why would it be more expensive to heat or cool a building made with is of glass compared to one built of drywall? use thermal conductivity to justify your answer
Answers: 3
Physics, 22.06.2019 11:00
Afisherman notices that his boat is moving up and down periodically without any horizontal motion, owing to waves on the surface of the water. it takes a time of 2.20 s for the boat to travel from its highest point to its lowest, a total distance of 0.670 m . the fisherman sees that the wave crests are spaced a horizontal distance of 5.80 m apart. (a) how much is the wavelength? (b) find the period of the wave. (c) how fast are the waves traveling? (d) what is the amplitude a of each wave?
Answers: 3
Physics, 22.06.2019 11:00
Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good
Answers: 1
Physics, 22.06.2019 16:50
Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.
Answers: 1
Why does it matter? heat & changes in temperature wrap-up question 1: electrical power in sou...
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