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A thick, vertical iron pipe has an inner diameter of 0.065 meter. A thin aluminum disk, heated to a temperature of 85oC, has a diameter that is 3.9 x 10-5 meter greater than the pipe inner diameter. The disk is laid on top of the open upper end of the pipe, absolutely centered on it, and allowed to cool. Evaluate the temperature of the aluminum disk when the disk falls into the pipe? Neglect the temperature change of the pipe.
A sample has a activity of 0.0021 Bq per gram of carbon. Find the age of the sample, assuming that the activity per gram of carbon in a living organism has been constant at a value of 0.23 Bq
Jack was exposed to fast neutrons; he received a radiation dose of 160 rem on part of his hand, affecting 27.0 grams of tissue. The relative biological effectiveness (RBE) of these neutrons is 11.0.
Tarzan, in one tree, sights Jane in another tree. He grabs the end of a vine with length 21m that makes an angle of 50? with the vertical, Calculate Tarzan's speed just before he reaches Jane
At NASA's Zero Gravity Research Facility in Cleveland, Ohio, experimental payloads fall freely from rest in an evacuated vertical shaft through a distance of 132 m. How fast will the payload be traveling when it reaches the bottom of the shaft
light from a laser beam with a wavelength of 530 nm passes through a narrow single slit and observed on a screen 1.0 m
A 199.9 kg satellite is in a circular orbit of 26,273 miles (42,300,000 m) in radius. What is the velocity (speed) of the satellite
A 200g block on a 50.0cm long string swings in a circle on a frictionless table at V1=45.0m/s comes to rest in 68.0s. Determine is the tangential acceleration? What is the magnitude of the tangential force?
a 7.5nc charge is located 1.8m from a 4.2nc charge. find the magnitude of the electrostatic force that one charge
A sprinter explodes out of the starting block with an acceleration of +4.4 m/s2, which she sustains for 1.2 s. What is her velocity at the end of the race
the index of refraction of silicate flint glass for red light is 1.620 and for violet light is 1.660. a beam of white
Suppose the pressure in a container of soda is 15 atm. At 25oC, the Henry's Law constant for CO2 in water is 1.61 x 103 atm. Estimate the mole fraction of dissolved carbon dioxide in the soda
an ambulance moving at 42 ms sounds its siren whose frequency is 450hz. a car is moving in the same direction as the
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