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A copper pipe with an outer radius of 0.013 m runs from an outdoorwall faucet into the interior of a house. The temperature ofthe faucet is 4.0oC, and the temperature of the pipe, at3.0 m from the faucet, is 25oC. In fifteenminutes, the pipe conducts a total of 270 J of heat to the outdoorfaucet from the house interior. Find the inner radius of the pipe. Ignore any water inside the pipe.
A 200-turn circular loop of radius 55 cm is vertical, with its axis on a line running east to west. What is the magnitude of the torque on the loop
1 suppose you weigh 874n and when you stand on one foot your weight is spread out over an area of 1.590times10-2m2.
A motorcycle and rider have a total mass equal to 305 kg. What is the net force on the motorcycle
Find the equation for the acceleration of the moving body at any time.
A certain lens focuses light from an object 1.25maway as an image 41.8cm on the other side of the lens. What type of lens is it
the mass of a copper atom is 5.55 x 10-25 kg and the density of copper is 8 920 kgm3 .a determine the number of atoms
q1. a train at rest emits a sound at a frequency of 1045 hz. an observer in a car travels away from the sound source at
The filament of a light bulb has a temperature of 2.85E+3 °C and radiates 40 watts of power. The emissivity of the filament is 0.344. Find the surface area of the filament
two balls 1.5 kg amp 1.1 kg hang by strings of the same length 0.75 m such that they are touching as they hang. the 1.5
Imagine that you send out a light flash at t=6.0 s as registered by your clock, At what time did your brother actually make this silly face and How far is your brother away from you
A free electron and a free proton are placed in an identical electric field. which of the following statement are true?
A string is wrapped around a disk of mass m = 1.7 kg and radius R = 0.08 m. Starting from rest, you pull the string with a constant force F = 7 N along a nearly frictionless surface. At the instant while the center of the disk has moved a distance..
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