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A typical discounted price of a AAA battery is $0.75. It is designed to provide 1.5 volts and 1.0 amps for about an hour. Now we multiply volts and amps to obtain power of 1.5 watts from the battery. Thus, it costs $0.75 for 1.5 Watt-hours of energy. How much would it cost to deliver one kilo Watt-hour? How does this compare with the cost of energy from your local electric utility at $0.10 per kilo Watt-hour?
Carbon dioxide gas enters a pipe at 3 MPa and 500 K at a rate of 2 kg/s. CO2 is cooled at constant pressure as it flows in the pipe and the temperature of CO2 drops to 450 K at the exit.
a 600 mm diameter wheel rolls without slipping on a horizontal surface as shown. rod ab is attached to the wheel at a
non-equilibrium statistical treanor distribution for vibrationally excited molecules. based on the non-equilibrium
air flows steadily through a compressor at the rate of 1.57 kgmin. the compressor requires 5 kw power input to compress
a cylindrical storage tank contains liquefied propane under a pressure of 1.5 mpa at a temperature of 388c. knowing
the turning moment diagram for a petrol engine is drawn to the following scales turning moment 1 mm 5 n-m crank
A causal discrete-time LTI system is described by y [n] - fr [n - 1] + i y [n - 2] = x [n] where x [n] and y [n] are the input and output of the system, respectively.
two identical cars a and b are at rest on a loading dock with brakes released. car c of a slightly different style but
Determine the minimum value of R and the corresponding value of x - Determine the equilibrium configuration angles a, /3, and y, as well as the tension in each cable segment
A rectangular prism has sides of 100, 80 and 50 mm before being subjected to a uniform fluid pressure of 80 MPa on all faces. Determine the changes to these dimensions and the change in volume which occurs.
a long power transmission cable is buried at a depth ground to cable centerline distance of 2 meters. the cable is
You want to create a graph showing the relationship of an ideal gas between pressure (P) and temperature (T). The ideal gas law relates the pressure, volume, amount, and temperature of an ideal gas using the relationship: PV = nRT. The ideal gas cons..
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