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1) A pot such made by Revere Copper ("Revereware") has two different metals composing the bottom of the pan- a stainless steel pan "body" with a copper base formed to the pan on the outside or burner contact surface. Why do you think this is done? Based on discussions in the book, do you think the heat transfer coefficient will be better with the copper bottom over the stainless steel pan, or is it there "just for show"? Would a bare stainless steel pan actually have a better heat transfer coefficient? Think this one through!
2) During a warmer winter or early spring day, wind at 40 deg.F is blowing at a speed of 40 mph parallel to a 12 foot high by 30 foot long wall of a house. Assuming the interior wall surface is 55 deg. F, find the rate of heat loss through the wall by convection.
3) You are working on a test using a 50 cm. long by 2 cm. diameter electric heating element. The element's exterior surface is polished aluminum (very low emissivity). The heating wire in the element is placed at the center of the tube and runs the length of the element. Both ends are well insulated, so you are only concerned with what happens at the cylinder surface. The element is powered with a constant 40 watt energy flow for the test period. If the surface temperature of the element is measured to be 120 deg.C and the surrounding air temperature is 20 deg. C, determine the natural convection heat transfer coefficient?
A helicopter is ascending vertically with a constant speed of 6 meters per second relative to the ground. At the instant the helicopter is 60 meters above the ground it releases a
How Can Your Weight Change? Your weight on Earth, or the force that pulls you toward the ground, is the pull of Earth’s gravity on you. If you want to calculate how many Newtons
In expressions of the conventional graphical representation of an electric field which of the following conceptual statements best represents what is meant by the electric flux thr
How we can calculate the magnitude of electric field above a sheet charged with voltage V where we know the bulk conductivity and relative permittivity of the space above the sheet
how to write a program from this using c language
calculate the acceleratio due to gravity on planet mercury if mass = 2.99 x 10 9to the power 23)kg and radius = 2.42 x 10( to the power 6) metres.
how to standing waves formed in closed pipes
Q. What is an electric dipole? Define: the dipole moment. Two equal as well as opposite charges separated by a very small distance constitute an electric dipole. Instances amm
Introduction of physics- Physics Essentials Why do most people believe physics is too hard? Most people get hung up by the feeling that they do not 100% totally understand what
a body travelling with uniform acceleration crosses two points A &B with velocities 30m/s & 50m/s the speed of the body at mid point of A&B is approximately?
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