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The external wall of a room in a house has a cross-sectional area of 34.13 m2. The convective heat transfer coefficients for the inside air are 8.77 Wm-2 0C-1. It is desired for the room to have a temperature of 23.740C and the external temperature to be 0 0C. The heater in the room is capable of supplying heat at a steady rate of 934 W.
Find the temperature for the internal surface of the wall, in 0C, giving your answer to 3 decimal places.
a 76 w light bulb with a resistance of 175nbspomega is connected to a power supply with a 117 v. what is the internal
An electron enters a region of space containing a uniform 0.0000217-T magnetic field. Its speed is 189 m/s and it enters perpendicularly to the field. Find the radius of the electron\'s orbit
Photons with a frequency of 7.8 multiply.gif 1015 Hz shine on a piece of molybdenum (work function = 4.2 eV). What is the energy of the ejected electrons? What is the de Broglie wavelength of the ejected electrons?
An ideal gas expands at a constant pressure of 2.1 atm from 457 mL to 713 mL. Heat then flows out of the gas, at constant volume, What is the total heat flow into the gas
The amplitude of the electric field of an electromagnetic wave is 197 V/m.
A golf ball with mass 45.90 g and diameter 42.60 mm is struck such that it is moving with a speed of 53.79 m/s and rotating. What is the rotation frequency of the golf ball
A car fuel tank is filled to the brim with 45 L (12 gal) of gasoline at 10 °C. Find how much gasoline overflows from the tank as the result of the expansion
Two large parallel metal plates are uniformly and oppositely charged and the electric field between them is 7.6 x 10^6 N/C. What is the charge density on each plate
Two kilomoles of a monatomic ideal gas are at a temp of 300K. The gas expands reversibly and isothermally twice its original volume. Calculate the work done by the gas. (Note that for an ideal gas U is proportional to T, so the change of U = 0 in ..
An insulated sphere has a uniform volume charge density,ρ , and R. What is the magnitude of the electric field in all space ?(That is, for any distance r from the center of the sphere, what isthe magnitude of the eletric field? Assume the charge i..
The bonding of silicon in solids and molecules is qualitatively the same as that of carbon. Silicon atomic states become molecular states and in a solid, these effectively form the valence and conduction bands.
A metallic, spherical Christmas tree ornament has a diameter of 16.00 cm. find where will he see his reflection in the mirror
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