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If the increase in TH or the decrease in TL is & (kelvin), determine the thermal efficiency using either approach. Which thermal efficiency is bigger?
Determine the pressure at the bottom of the tank and the height of the liquid column that will rise in the vetical tube.
As soon as the pressure in the bottle reached 100kPa the valve is closed. What is the temperature of the air that is in the bottle at the end of this filling process?
The refrigerant enters the compressor at 500 kPa as a saturated vapour at a rate of 100 L/min and leaves at 1.2 MPa and 50°C. Calculate (a) the actual COP; and (b) the maximum COP.
Refrigerant-134a is throttled from the saturated liquid state at 700kPa to a pressure of 160kPa. Determine the temperature drop during this process and the final specific volume of the refrigerant.
Suppose an external torque T1 is applied to Shaft 1, which has polar area moment of inertia J1. Find the optimal tooth no. ratio, N2/N1 for maximal angular acceleration of Shaft 2.
Using the properties of water for the drink, determine the mass of ice that will melt by the time the canned drink cools to 45°F.
If the atmospheric pressure is po. Find the pressure (a0 at the top face of the cylinder (b) at the bottom face, and (c) at base of the beaker.
A 0.1 m long mullite furnace tube is heated from room temperature (25 degrees celcius) to 1000 degrees celcius. Assuming the rude is not mechanically constrained, calculate the increase in length pr
The remaining wet steam exits the turbine at 11.5 kPa with a quality of ) 0.88. Estimate the power produced by the turbine assuming adiabatic operation and negligible kinetic potential energies.
Determine the time it takes to complete the turn? Note the pilot performs the turn by decreasing the path radius of curvature uniformly as a function of position s.
The duration of the impact is 0.001 s, and the watch bounces 2 in above the floor, what is the average value of the impulsive force?
The air can be modeled as an ideal gas. Determine the mass, in kg and pressure, in kPa in the container after 20 seconds if the temperature is 20 °C.
What are the possible failure modes for the shaft that must be considered to determine if the shaft is safe? Where are the critical points on the shaft were failure would likely occur first for each f
Plot the temperature profile from fuel centerline to the fuel and determine the value of the temperature at the fuel centerline, edge of the fuel, inner clad surface, and sheath surface.
Assume addition of LiOH does not affect boiling point. What rate of flow through the zone control unit is necessary to ensure the tank does not boil.
Initially, the air in this tank is at 20 psia and 70 degrees F. Presuming that the tank is well insulated, determine the temperature and mass in the tank when it is filled to 120 psia.
A Rankine power cycle operates with an open feedwater heater. Determine fraction of flow bled from the turbine to provide a boiler feedwater inlet temperature of 150 C.
Cooling air at 25C flows through the fins arrant creating a heat transfer of 28W/m^2 K. Using 175W/mk for the thermal conductivity of aluminum, estimate the temperature of the base of the semiconduc
What is the allowable heat dissipation rate if the temperature of the aluminum plate must not exceed 70C use k=180 W/mk for aluminum.
A fan blow 25 degrees C air through the array creating a heat transfer coefficient of 110W/m^2K. if the temperature of the chip cannot exceed 75 degree C. what is the allowable power rating of the c
Three particles are sliding along a flat frictionless surface, Ma = 0.4 kg, Mb = 0.5 kg, and Mc = 0.4 kg. How fast will ball c be traveling after all collisions have ceased?
Determine the silicon temperature and the electric power produced by the solar cell for an air velocity of 4 m/s parallel to the long direction.
A. for a supply air volumetric flow rate of 40m^3 /min, determine the supply air temperature T in degrees celsius and the relative humidity.
Find: a) Draw a schematic of the power cycle, b) Determine the maximum thermal efficiency that could be expected for this power cycle.