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Consider a person standing in a room maintained at 20°C at all times. The inner surfaces of the walls, floors, and ceiling of the house are observed to be at an average temperature of 12°C in winter and 23°C in summer. Determine the rates of radiation heat transfer between this person and the surrounding surfaces in both summer and winter if the exposed surface area, emissivity, and the average outer surface temperature of the person are 1.6 m2, 0.95, and 32°C, respectively.
A father racing his son has two-fifths the kinetic energy of the son, who has one-third the mass of the father. The father speeds up by 1.0 m/s, What is the original speed of the father
Calculate the maximum electric potential it can reach before the surrounding air breaks down because of the electric field near the surface of the dome
What is the kinetic energy of a 1500 kg car traveling at a speed of 35 m/s (76 mph), Does your answer to part b depend on the car's mass
A charge of -3.2 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.099 m. The charges on the circle are -3.95 µC at the position due north and +5.45 µC at the position du..
A hockey puck is given an initial speed of 5.4m/s. how far does the puck slide before coming to rest
water flows at 0.885 ms through a hose with a diameter of 2.92 cm and then exits through a nozzle with a diameter of
A 4m long wire with thickness 5mm carries a current 0.4 A. A second identical wire of equal length and thickness is parallel and carries 0.6 A in the same direction. What is the force of the first wire on the second wire
A solid wood door 1.00 m wide and 2.00 m hight is hinged alone one side and has a total mass of 40.0 kg, whats the final angular speed of the door
a 4.50g bullet is fired horizontally into a 2.35kg wooden block resting at the bottom of a 25 degree inclined surface.
A solenoid has a cross-sectional area of 5.8 x 10-4 m2, consists of 330 turns per meter, and carries a current of 0.41 A. Find the average current induced in the coil
A compound microscope has a barrel length of 163.0 mm and an objective with a 4.110-mm focal length. Find the angular magnification of the eyepiece
Assuming that the total retarding force on the diver is constant at 55.0 N with the parachute closed and constant at 3600 N with the parachute open, what is speed of the diver while he lands on the ground.
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