Physics, 31.08.2019 05:10, skmc1985

As discussed in class, a perpetual motion machine of the second kind (that is, a device which could absorb heat from a single heat reservoir and delivers work, without any other permanent macroscopic change to the universe) would be quite useful, were it not for the inconvenient fact of it violating the second law: (a) search the internet in order to estimate the following: the average temperature of the earth's oceans, the amount (mass) of water in the oceans, the specific heat capacity of salt water, and the total annual energy used (chemical fuel, plus other electrical) by the human population, as of 2018. (b) if heat could be extracted from the oceans and converted entirely to work, estimate how many years of present human energy needs could be satisfied by lowering the temperature of the ocean by a single degree celsius

Answers: 2

Show answers

Other questions on the subject: Physics

Physics, 21.06.2019 20:30, 173899

Water at room temperature of 20.0°c is poured into an aluminum cylinder which has graduation markings etched on the inside. the reading in the graduations is 300.0 cc. the cylinder with the water in it is then immersed in a constant temperature bath at a temperature of 100°c. what is the reading for the level of water on the graduations of the cylinder after the water and the cylinder reach thermal equilibrium with the bath? the volume coefficient of expansion of water is 2.07 x 10^-4 k-1, and the linear coefficient of expansion of aluminum is 23.0 x 10^-6 k-1. a) 305.0 cc b) 304.0 cc c) 303.5 cc d) 303.3 cc e) 304.5 cc

Answers: 3

continue

Physics, 22.06.2019 04:00, katieleeisaacs8368

Ametal ball with a mass of 0.028 kg is dropped from rest at a height of 1.0 meters above the ground. assuming the energy in the ball is conserved, how much kinetic energy will the ball have when it is 0.5 meters above the ground?

Answers: 1

continue

Physics, 22.06.2019 07:00, Angelanova69134

Photoelectrons with a maximum speed of 6.50 x 107 m/s are ejected from a surface in the presence of light with a frequency of 6.75 x 1014hz. if the mass of an electron is 9.10 x 10-31 kg, calculate in joules the maximum kinetic energy of a single electron. 3.84 x 10-15 j 1.92 x 10-15 j 5.92 x 10-23 j 3.07 x 10-16 j

Answers: 1

continue

Physics, 22.06.2019 12:30, jaejaeJae941

Urgent pls a. coal consumption levels off and remains flat. b. petroleum, natural gas, and renewables show an increase in consumption c. more nonrenewable resources continued to be consumed than renewable. d. there is little projected increase in nuclear energy use. e. carbon dioxide emissions are projected to decline as we approach 2040. global energy consumption is defined as the total energy used by an individual or organizations from around the world. use the graph above to analyze the projected energy consumption from now until 2040. which statements in the prompt apply? a) a, b, d b) b, c, d c) a, c, d d) a, b, c, d

Answers: 1

continue

Do you know the correct answer?

As discussed in class, a perpetual motion machine of the second kind (that is, a device which could...