1.Suppose 200 J of work is used to compress a gas. If 125 J of heat escape in the process what is the change in internal energy of the gas?
I know it has to do with the change in internal gas equals work plus heat but I'm not too sure how to set it up.
what is the beat frequency when a 330 Hz sound and 332 Hz sound occur simultaneously?
What is the ideal efficiency of an automobile engine where fuel is heated to 700 K and outdoor air is 280 K?
A weight suspended from a spring is seen to bob up and down over a distance of 30 centimeters twice every three seconds. What is the period of oscillation? frequency? amplitude of oscillation?
Again, thanks to everyone who can help
2007-12-17 09:19:31 · 1 answers · asked by wienrshnitzel 1 in Science & Mathematics ➔ Physics
200 J went in. 125 J escaped, leaving 75 J as the change in internal energy of the gas.
The beat frequency is the difference in frequencies; in this case, 2 Hz.
1 - T_cold / T_hot
1 - 280 K / 700 K = .6
In practice, real-world automobile engines seldom achieve as much as 40% of their theoretical efficiency.
Frequency = 2 revolutions / 3 seconds ( revolutions / second )
Period = 1 / Frequency ( seconds / revolution )
2007-12-17 09:55:23 · answer #1 · answered by jgoulden 7 · 0⤊ 0⤋