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A dog has thick fur, with a thermal conductivity of 0.040W/(m • K). The dog's metabolism produces heat at a rate of45 W and its internal (body) temperature is 41°C. If all of this heat flows out through the dog's fur, determine what is the outside temperature? Suppose the dog has a surface area of 0.47m2 and that the length of the dog's hair is 1.2 centimeter.
a billiard ball strikes and rebounds from the cushion of a pool table perpendicularly. the mass of the ball is 0.38 kg.
Lets suppose if a pure Si crystal has 5 X 10 28 atoms m -3. It is dopped by 1 PPM concentration of pentavelents As( arsenic)
suppose a cube of aluminum which is 1.00 cm on a side accumulates a net charge of 1.80 pc.a what percentage of the
Tarzan has a mass of 75.0 kg and is swinging on a vine that is 8.00 meters long. What is the maximum speed at which he can swing
As you stand by a railroad track a train passes with its whistle blowing. As it passes, you hear a frequency shift equal to 24% of the frequency of the whistle. How fast is the train moving. Express your answer in km/hr. (Speed of sound is 331..
A 5.0-cm-diameter coil has 20 turns and a resistanceof 0.50 ohms. A magnetic field perpendicular to the coil is B =0.02t + 0.010t^2, where B is in tesla and tis in seconds. Find an expression for the induced current I(t)as a function of time.
A beam of electrons is accelerated through a potential difference of 10kV before entering a velocity selector. If the B-field of the velocity selector is perpendicular to the velocity and has a valueof 0.05 T, what value of the E-field is required..
An airplane pilot fell 355 m after jumping from an aircraft without his parachute opening. He landed in a snowbank, creating a crater 1.3 m deep, estimate the work done on him by air resistance as he fell
Suppose that suddenly the angular velocity of the moon wa about the earth quadrupled. Assuming conservation of angular omentum the distance between the earth and the moon must have suddenly doubled.
a pendulum clock that works perfectly on earth is taken to the moon. assume that the free-fall acceleration on the moon
A person of mass m is standing at the edge of a large rotatingdisk. The disk is rotating without friction and has angular velocity ω, what will be the change in angular velocity
q1. a 19 kg box slides 4.0 rm m down the frictionless ramp shown in the figure then collides with a spring whose
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