Recent content by akan

I have managed to solve this problem already, just haven't updated. Thank you.

Homework Statement The figure shows the thermodynamic cycle of a diesel engine. This cycle differs from that of a gasoline engine in that combustion takes place isobarically. The compression ratio r is the ratio of maximum to minimum volume: r = V_1 /V_2. In addition, the so-called cutoff...

I have managed to solve this problem. Thank you.

I have managed to solve this problem. Thank you.

I don't know how to calculate work from that equation, please explain that to me further. Thanks.

I see that as pressure increases, volume also increases. So temperature, too, must increase. So there process is neither isothermal, nor isometric nor isobaric. Therefore, it has to be adiabatic. But the adiabatic formulas require a y value: (p_1 V_1 - p_2 V_2) / (y - 1). The value is not...

Homework Statement An ideal gas is taken clockwise around the circular path shown in the figure. http://img529.imageshack.us/img529/5513/rw1864bp8.th.jpg http://g.imageshack.us/thpix.php How much work does the gas do? If there are 1.3 mol of gas, what is the maximum temperature...

This is for an introductory physics course, and the book defines four different types of processes: Isothermal, Isometric, Isobaric, and Adiabatic (no heat transfer). I think I am supposed to use one of those, and it would be adiabatic since the problem mentions it.

Homework Statement a) By how much does the temperature of an ideal monatomic gas change in an adiabatic process in which 2.0 kJ of work are done on each mole of gas? b) By how much does the temperature of an ideal diatomic gas (with molecular rotation but no vibration) change in an adiabatic...

Homework Statement An ideal gas expands from the state (p_1, V_1 ) to the state (p_2, V_2 ), where p_2 = 2p_1 and V_2 = 2V_1. The expansion proceeds along the straight diagonal path AB shown in the figure. Find an expression for the work done by the gas during this process. Express your...

Ok, so here's my attempt at solution.. I = POWER/AREA = FORCE * VELOCITY / AREA PRESSURE = FORCE/AREA PRESSURE = I / VELOCITY. Since we are talking about sound, I suppose it is PRESSURE = I / V_SOUND (340), where I calculated I to be (I_0) (10^6.5). But this doesn't seem to give the right answer...

>> How many times has one motor turned in 21 seconds? The first one rotated 3600 rpm * m/60s * 21s times. I don't know about the second one since it's the one I need to find. >> If during the beat the "faster" one precessed such that you discerned a "beat" wouldn't that mean that the faster one...

Wow, that is probably the reason. The whole chapter was on sound so I thought the problem was, too, and didn't read it correctly. Did I make any other mistakes? Thanks.

Homework Statement Suppose you're operating a machine with two motors. If the two motors are not operating at the same rpm, you will hear a periodic variation in the intensity of the sound-that is, beats. Suppose the tachometer that indicates the rotation rate of one motor is malfunctioning...

Homework Statement What is the frequency shift of a 72 GHz police radar signal when it reflects off a car moving at 111 km/h? (Radar waves travel at the speed of light = 340 m/s.) -------- f' = f(1 +- u/v) (moving observer, + appr, -receding) f' = f/(1 +- u/v) (moving source, - appr...