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Someone with an external body temperature of 3 degrees Celsius present in the room at a temperature of 25 degrees Celsius. assuming the body emissivity to 0.5 and the surface area of the body as a 2.0 sq m, calculate the radiation power of the people.
Water in a vertical piston cylinder is heated at constant pressure of 10 bar. It is initially at 179.9 0C and has a specific volume of 0.1 m3/kg and is heated to a final specific volume of 0.248 m3/kg. Changes in kinetic and potential energies are ze..
A helical compression spring made from hard drawn wire needs to be designed to fit inside a 50mm cylindrical cavity and there must be enough space inside the coils for a 20mm cylindrical guide rod.
In an experiment, the temperature of a hot gas stream is to be measured by a thermocouple with a spherical junction. Due to the nature of this experiment, the response time of the thermocouple to register 99% of the initial temperature difference ..
Water is in a 0.05 m^3 piston-cylinder assembly at 1 MPa, 220 C and the piston is resting on stops. Heat is added until the pressure doubles. At this point the piston movies until the volume increases by 50%.
A short post AB has a commercially manufactured eyebolt screwed into its end. Three cables attahced to the eyebolt apply forces shown.
your friend a 75 kg mountain climber is suspended from a cliff by a rope. calculate the tension in the rope in newtons
The solid sili- con powder is at Tsi,i = 298 K, and the solid silicon sheet exits the chamber at Tsi,o = 420 K. Both the surroundings and ambient temperatures are T00 = Tsur = 298 K.
the piston has a mass of 4kg and cross-sectional area of 35cm^2. A compressed spring above the piston exerts a force of 60N on the piston. if the atmospheric pressure is 95kPa, determine the pressure inside the cylinder.
A. 0.75 kg of nitrogen is compressed in a cylinder polytropically (n = 1.3). The initial conditions are 140 kPa & 37 C. The gas is compressed until the volume is reduced by half (50% of original). Assume constant specific heats at 300 K
a long time ago the specific heat at constant volume of gases cv was determined indirectly from cp measurements and
The tractor is about to tow the plane to the right. Is it possible for the driver to cause the front wheel of the plane to lift off the ground as he accelerates the tractor? Draw the free-body and kinetic diagrams and explain algebraically (letter..
two parallel opposing forces are located 6 meters apart. the force on the left is directed downward and is 4 kn. the
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