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The rate of heat loss Q . loss through a window or wall is a function of the temperature difference between inside and outside ? T, the window surface area A, and the R value of the window, which has units of (ft2 . h . °F)/ Btu. (a) Using the Buckingham Pi Theorem, find an expression for rate of heat loss as a function of the other three parameters in the problem. (b) If the temperature difference ? T doubles, by what factor does the rate of heat loss increase?
an optical fiber for telecommunications is made of sio2 glass density 2.20 mgm3. how many si atoms and how many o
a solid cylinder of mass m 5 kg and radius r 20 cm is mounted on a frictionless horizontal axle over a well. a rope
The angular acceleration of a shaft is defined by the relation a = -0.25w, where a is expressed in rad/s^2 and w in rad/s. Knowing that at t=0 th angular velocity of the shaft is 20 rad/s, determine the time required for the shaft to come to rest.
a projectile is fired at t 0 with an initial velocity of vi at an angle of ? with respect to the horizontal towards
two tanks tank a and tank b are seperated by a partion. initially tank a contains 2 kg steam at 1mpa and 300 celsius
Two slender rods of negligible weight are pin-connected at A and attached to the 18-lb block B and the 80-lb block C as shown. The coefficient of static friction is 0.55 between all surfaces of contact. Determine the range of values of P for which..
a downward force of 98 n acts on the free end of the illustrated pulley. ma 47 kg what is block as acceleration?
Number 3 fuel oil (30 API) is transferred from a storage tank at 60 deg F to a feed tank in a power plant at a rate of 2000 bbl/day. Both tanks are open to the atmosphere and they are connected by a pipeline containing 1200 ft equivalent length of 1...
pole a whose coordinates are 20 degree n 50 degree e is to be rotated about the axes described below. in each case find
Discuss the similarity and difference between TRIP and TWIP steels. Discuss the advantages of TWIP steels. Discuss the effects/roles of Mn, Al and Si in TWIP steels.
a steady flow of 15 kgs of high-pressure liquid oil drives a hydraulic motor at the steady-state-steady-flow conditions
a how deep must a submarine be immersed in sea water specific gravity is 1.03 for its shell to experience an absolute
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