subject
Physics, 18.10.2019 13:30 daniellekennedy05

Which of the following statements is true?
a).coal is a major source of gasoline for cars and trucks.
b).most of the world's oil is found in the united states.
c).many household products are made using oil and natural gas.
d). coal is the least-polluting fossil fuel.

ansver
Answers: 3

Another question on Physics

question
Physics, 21.06.2019 17:10
An air-standard stirling cycle operates with a maximum pressure of 600 psia and a minimum pressure of 10 psia. the maximum volume of the air is 10 times the minimum volume. the temperature during the heat rejection process is 100Β°f. calculate the specific heat added to and rejected by this cycle, as well as the net specific work produced by the cycle. use constant specific heats at room temperature. the properties of air at room temperature are r
Answers: 2
question
Physics, 21.06.2019 23:00
Acoal-fired plant generates 600 mw of electric power. the plant uses 4.8 x 10^6 kg of coal each day, and the heat of combustion of coal is 3.3x 10^7 j/kg. the steam that drives the turbines is at a temperature of 300Β° c, and the exhaust water is at 37Β° c. (a) what is the overall efficiency of the plant for generating electric power? (b) how much thermal energy is exhausted each day? (c) what is the change in entropy of the universe for this heat engine? (d) using the same heat reservoirs, what is the maximum possible (carnot) efficiency for a heat engine?
Answers: 1
question
Physics, 22.06.2019 14:50
Abar magnet cut in half will form a total ofpoles.a)fourb)eightc)two
Answers: 1
question
Physics, 22.06.2019 16:50
Two loudspeakers, 5.5 m apart and facing each other, play identical sounds of the same frequency. you stand halfway between them, where there is a maximum of sound intensity. moving from this point toward one of the speakers, you encounter a minimum of sound intensity when you have moved 0.33 m . assume the speed of sound is 340 m/s.part a) what is the frequency of the sound? part b) if the frequency is then increased while you remain 0.21 m from the center, what is the first frequency for which that location will be a maximum of sound intensity? express your answer to two significant figures and include the appropriate units.
Answers: 2
You know the right answer?
Which of the following statements is true?
a).coal is a major source of gasoline for cars an...
Questions
Questions on the website: 13722360