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A fire clay brick ( rho = 2000 kg/m2, k= 1.0 W/m-K, Cp = 800 J/kg-K) of dimensions 5 cm by 10 cm by 15 cm is removed from a kiln at 1000 degree C and cooled in air at 30 degree C with h = 80 W/m2-K. What is the temperature at the center of the brick and at the corners of the brick after 1 hour of cooling?
a crate with mass 50kg is pulled up a 30 degree incline by a person pulling on a rope that makes a 30 degree angle with
consider a concentric tube heat exchanger with hot and cold water inlet temperature of 200 and 35c respectively. the
a single-pane glass window is used in a heated dwelling. outside the dwelling the ambient temperature is 0degc while
the jmh company manufactures resistors with an ideal resistance value of 400 ohms. a sample of 2000 resistors were
Describe the four incorrect assumptions concerning robot - arm movement that are most frequently responsible for impact accidents.
in an ideal dual combustion cycle conditions at the commencement of adiabatic compression are 93 kpa 0.05 m3 and 24degc
a 6-km cast-iron new pipeline conveys 320 lsec of water at 30 degrees celsius. if the pipe diameter is 30 cm compare
a light globe dissipates 200w as heat. it is exposed to a light breeze of air at 20c which results in a convective heat
package is dropped from the plane which is flying with a constant horizontal velocity of vA = 150 ft/s at a height h = 1500 ft. Determine the radius of curvature of the path of the package just after it is released from plane at A.
consider the following cross sections a a hollow tube of 50-mm outside diameter and 2.5-mm wall thickness b an
large cylindrical bales of hay used to feed livestock in the winter months are d2m in diameter and are stored
water at a temperature of 40 c and a pressure of 100 kpa enters a pump at the rate of 50000 kghr. the water leaves the
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