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A geothermal power souce is used to operate a plant to produce oxygen. A deep well of water with volume 1000 m3 at initial temperature 100 Celsius is used as the power source for the plant. There is an infinite lake nearby at a temperature 5 Celcius. The plant will separate O2 from the air at 1 atm pressure and 20o Celcius. The air is a mix of ideal gases (O2 and N2) with mole fractions 1/5 for 02 and 4/5 for N2.
Assuming Carnot efficiency, how many moles of 02 can be separated out before the power source is depleted (remember: the temperature of the well decreases as energy is extracted from it).
a tennis ball traveling with velocity v15ms strikes a vertical wall and bounces back at v2-20ms. if the change in the
A supply plane needs to drop a package of food to scientists working on a glacier in Greenland. How far short of the target should it drop the package
A car making a 105-km journey travels 42 km/h for the first 52.5 km. How fast must it go during the second 52.5 km to average 53 km/h
An inventor claims to have devised a cyclic engine which exchanges heat with reservoirs at 300 K and 540 K, and which can produce 450 J of work per 1000 J of heat extracted from the hot reservoir. Is his claim feasible.
If the value of the linear charge density is ? = 40.5 ?C/m and the distance between the two cables is D = 40.5 m, calculate the electric field midway between the two cables
A non-uniform beam of length 4.51m and weight 1.05kN makes an angle of 24.0 degrees with the horizontal. Find the vertical component of the force exerted on the beam by the pivot
A subway train has a sound intensity level of 90 dB, and a rock band has a sound intensity level of 110 dB. How many times greater is the sound intensity of the band than that of the train
A 9.27-m-long glider with a mass of 545.48 kg (including the passengers) is gliding horizontally through the air at 29.02 m/s, What is the glider's horizontal velocity
When a softball player swings a bat, she accelerates it from rest to an angular velocity of 10 rad/s in a time of 0.26792 seconds. What is the magnitude of the torque she applies to the end of the bat? Model the bat as a uniform rod of length 0.90 m ..
In a women's 100-m race, accelerating uniformly, Laura takes 1.81 s and Healan 3.06 s to attain their maximum speeds, which they each maintain for the rest of the race.
A circus juggler performs an act with balls that he tosses with his right hand and catches with his left hand. what is the maximum number of balls he can juggle
A proton is placed in a uniform electric field of 2900N/C. Calculate the proton's acceleration
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