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A solid cylinder of radius r1 = 2.5 centimeter, length h1= 5.0 centimeter, emissivity 0.85, and temperature 30oC is suspended in an environment of temperature 50oC,
a) Determine the cylinder net thermal radiation transfer rate P1?
b) If the cylinder is stretched until its radius is r2=0.50 centimeter, its net thermal radiation transfer rate becomes P2. Determine what is the ratio of P2/P1?
Starting from rest, a 4.4-kg block slides 2.70 m down a rough 30.0° incline. The coefficient of kinetic friction between the block, Determine the work done by the force of gravity
A bottle made of ordinary glass has an internal volume of 1.0000 liter at 20.0 oC, At what temperature ( inoC, enter deg in the answer box) will water begin to overflow the bottle
A 65- kg child sits in a swing suspended with 3.4- m-long ropes. The swing is held aside so that the ropes make an angle of 60 o with the vertical
in other cases there is a clear break between the rainbow orders. the spacing of ruled lines on a diffraction grating
In the annual battle of the dorms, students gather on the roofs of Jackson and Walton dorms to launch water balloons at each other with slingshots. Find the initial speed of this second balloon
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 44 dB by an observer 10 km away. What is the average power generated by the horn
A car driving directly north on the freeway at a speed of 110 km/h and a truck is leaving the freeway driving 85 km/h in a direction 35 west of north
A garden hose having with an internal diameter of 2.0 cm is connected to a (stationary) lawnsprinkler that consists merely of an container with 23 holes, each 0.20cm in diameter. at what speed does it leavethe sprinkler holes
What are the speed and period of a person on a carousel if the person has a centripetal acceleration with a magnitude of 1.0 m/s2 when she is standing 3.0 m from the axis
1. a parallel-capacitor is connected to a battery. what happens to the stored energy if the plate separation is doubled
We have a container of a hot ideal monatomic gas. The volume of the container is 25 liters. determine the change of internal energy of the gas
A femur is a bone in the leg whose minimum cross sectional area is about 4.0 x 10^-4 m^2. Find the maximum stress that this bone can withstand
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