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Question: 1. A hot fluid is to be cooled in a double-pipe heat exchanger from 245°F to 225°F. The cold fluid is heated from 135°F to 220°F.
2. Calculate the heat loss per lineal foot from a 3-in. Schedule 40 steel pip [3.07 in. ID, 3.500 in. OD, k = 25 Btu/(h ft OF)] covered with 1 in. thickness of insulation [k = 0.11 Btu/(h ft °F)]. The pipe transports a fluid at 300°F with an inner heat transfer coefficient of 40 Btu/(h ft OF), [hinside], and is exposed to ambient air at 80°F with an outside heat transfer coefficient of 3 Btu/(h ft2 °F).
Three balls (m= 0.450 kg) are placed at evenly spaced intervals on a 0.75 m rod (m= .250 kg). Find the moment of inertia of the entire system
The outfielder throws a baseball with an initial speed of 10 m/s. An infielder catches the ball at the level 1 m lower, what work is done by air resistance
An aluminum cup of mass 200 g contains 800 g of water in thermal equlibrium at 80.0c. the combination of cup and water is cooled unformly so that temperature decreases by 1.50c per minute. at what rate is energy being removed by heat.
A 10-m uniform beam of weight 100 N is supported by two ropes atthe ends. If a 400-N person sits at 2.0 m from the left end of thebeam, what is the tension in the right rope
A 2.1-cm-diameter metal sphere is glowing red, but a spectrum shows that its emission spectrum peaks at an infrared wavelength of 2.2 µm. How much power does the sphere radiate
The total resistance of the loop is R. Derive an expression that gives the current in the loop at the instant the near side is a distance r from the wire.
It takes a student t = 7.6 s to push a block m = 11 kg at a constant velocity over a distance of d = 8.2 m. Write an expression for the energy required to move the block along this path in terms of the variables provided
Now suppose the friction is sufficient to keep the car from skidding. Compute the magnitude of the normal force exerted on the car by the road's surface.
A child playing in a swimming pool realizes that it is easy to push a small inflated ball under the surface of the water while a large ball requires a lot of force
the magnitude of the net electric field. A lead ball is dropped into a lake from a diving board 6.40 above the water. After entering the water, it sinks to the bottom with a constant velocity equal to the velocity with which it hit the water.
A projectile is launched from a 300 m high cliff at an angle of 30? with an initial velocity of 150 m/s. (g=9.8m/s2). calculate the Direction of the velocity on impact
In a certain solar house, energy from the Sun is stored in barrels filled with water. In a particular winter stretch of five cloudy days, 1.37 x 106 kcal is needed to maintain the inside of the house at 22.4oC. what volume of water is required
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