How much energy left the balloon in btu
A constant-pressure balloon contains 1.5-lbm saturated water vapor at 15 psia. Heat loss from the balloon causes all the water to condense into a saturated liquid. How much energy left the balloon, in Btu?
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A particle of mass m is subject to the delta-function potential V(x) = -alpha delta(x) with alpha > 0. Evaluate the uncertainty product alpha x alpha p for the hound state.
Given that the latent heat of water/steam is approximately 41,000 J/mol, at what pressure will water boil at 50 degress Celcius? hint: remember that at 1 atm water boils at 373 K. Also, assume that the latent heat is constant and that the volume o
The coefficient of friction between all contacting surfaces is 0.3. Calculate the minimum force F required to start C moving upward.
An automobile suspension involves both leaf springs with stiffness k and shock absorbers resist motion with a force -uv. The system is critically damped. If a car has mass 2000 kg and has shock absorbers with u = 2.5 x10^4 kg/s, how much should th
Heat loss from the balloon causes all the water to condense into a saturated liquid. How much energy left the balloon, in Btu?
A rigid tank is divided into two equal parts by a partition. One part of the tank contains 2.5 kg of compressed liquid at 400 kPa and 60 degrees Celcius while the other part is evacuated. The partition is now removed, and the water expands to fill
An electron is accelerated through 1.60 x 103 V from rest and then enters a uniform 2.80-T magnetic field. (a) What is the maximum magnitude of the magnetic force this particle can experience?
Parallel plates form a solar collector that covers a roof, with a 4m long plates and 1m between plates. The plates are maintained at 15 C., while ambient air at 10 C flows over the roof with V= 2 m/s.
Saturated liquid R-134a at 50 psia enters an adiabatic throttling value at a rate of 0.2-lbm/s. The outlet pressure is 15 psia. What is the outlet volumetric flow rate in ft^3/s?
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