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A compressive force of 600 N is to be applied to the two boards in the grip of the C-clamp. The threaded screw has a mean diameter of 10 mm and advances 2.5 mm per turn. The coefficient of static friction is 0.20.
Determine the force F which must be applied normal to the handle at C in order to (a) tighten and (b) loosen the clamp. Neglect friction at point A.
Consider two actual power plants operating with solar energy. Energy is supplied to one plant from a solar pond at 80°C and to the other from concentrating collectors that raise the water temperature to 600°C. Which of these power plants will have a ..
A closed system contains 0.5 kg of nitrogen, initially at 150 KPa with a volume of 0.3 m^3. The system undergoes a poly tropic process resulting in the final state of 240 KPa and 100 C. Determine a) the poly tropic coefficient and b) the associated b..
A rotating saw blade has 48 teeth and 4 slots. If the room where the saw is used is illuminated with a pulsed light source, at what pulse frequencies will a) the saw blade teeth appear to be stationary? b) the blade slots appear stationary?
Estimate the slope dp/dt of the ice +water line using the triple point information. Specific entropy of ice at the triple point is -1221J/kgK , specific entropy of liquid water at triple point is 0.0 J/kgK. Determine therefore the temperature in Cels..
for the vapor power cycle steam enters the at 3 mpa and 500 c and leaves at 70 kpa and 200 c. the system is operating
a storage tank in a refrigeration system has a volume of 0.0060 m3 and contains a two phase liquid-vapor mixture of
calculate the change in entropy enthalpy and gibbs energy due to mixing when 35 moles of he gas 15 moles of ne gas and
Consider a cargo vehicle that will travel back and forth between the moon and LEO that is propelled by an electric propulsion system on a slow spiral trajectory. Assume that the characteristic velocity change (?v) for this mission is ?v=6,800 m/s.
a carnot heat engine using 1 kg of air has the following conditions isothermal heat addition beginning at 15 mpa and
an electric light is placed directly over the center of a circular plot of lawn 100m in diameter. assuming that the
now consider the cooling process. it takes place in a heat exchanger hx. warm air. at 75 f is flows into one side of
a circular bar of radiusr 1 cm is placed horizontally between two vertical supports that are separated by distancel
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