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A keg of beer is covered with a wet towel. Imagine that the keg gains energy from its surroundings at a rate of 20 W.
At what rate in grams per second must water evaporate from a towel placed over the keg to cool the keg at the same rate that energy is being absorbed?
A steel tube, 24mm OD and 20mm ID is used to create a torque sensor. Four gauges are fitted to the tube in a bridge configuration and the bridge is supplied from a 10V source. What is the output voltage from the bridge if the applied torque is 50Nm..
Vertically polarized light with an intensity of .60 W/m^2 passes through a polarizer whose transmission axis is at an angle of 35 degrees with the vertical
Suppose that at the top of its parabolic trajectory a projectile has a horizontal speed Uox. What is the radius of the circle
a window washer is standing on a scaffold supported by a vertical rope at each end. the scaffold weighs 190 n and is
A couple of astronauts agree to rendezvous in space after hours. Their plan is to let gravity bring them together. Find the his and her initial acceleration
Displacement is which of the following types of quantities.
What is the total mass of the earth's atmosphere? (the radius of the earth is 6.37X10^6m. and atmosphere pressure at the surface is 1.013X10^6N/m^2)
A 5.16 multiply.gif 10-5 H solenoid is constructed by wrapping 64 turns of wire around a cylinder with a cross-sectional area of 8.80 multiply.gif 10-4 m2, Determine the change in the length of the solenoid
molecules have additional degrees of freedom that atoms dont possess namely rotation and vibration. the energies
Problem 1: The position of an object is given by x = at3 - bt2 + ct, where a = 4.1 m/s3, b = 2.2 m/s2, c = 1.7 m/s, and x and t are in SI units. What is the instantaneous acceleration of the object when t = 2.3s?
Bone has a Young's modulus of about 1.80 1010 Pa. Under compression, it can withstand a stress of about 1.55 108 Pa before breaking. Assume that a femur (thigh-bone) is 0.60 m long, and calculate the amount of compression this bone can withstand befo..
A race car travels northward on a straight, level track at a constant speed travels 0.764 km in 17.0 s. The return trip over the same track is made in 22.0 s. What is the average velocity for the total trip
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