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A brass ring of diameter 10.00 cm at 20.0°C is heated and slipped over an aluminum rod with a diameter of 10.01 cm at 20.0°C. Assuming the average coefficients of linear expansion are constant. (a) To what temperature must this combination be cooled to separate the two metals? °C (b) To what temperature must this combination be cooled to separate the two metals if the aluminium rod were 10.05 cm in diameter?
Assume a typical hummingbird has a lifespan of 4.00 years and an average heart rate of 1300 beats per minute. Compute the number of times a hummingbird's heart beats in its life, and express it in scientific notation. Make use of 365.24 days per y..
under what limits does the field of a uniformly charged disk match the field of a uniformly charged infinite sheet?a
a 65 kg man in a 5.9 kg chair tilts back so that all his weight is balanced on two legs of the chair. assume that each
A shell is fired from a gun with a muzzle velocity of 35 m/s, at an angle of 60° with the horizontal. How far from the gun does the other fragment land
In the figure below a crowbar is used to lift a weight. If a down ward force of 228 N is applied to the end of the bar, how much weight does the other end bear? The crowbar itself has negligible weight. (Let r1 = 29.0 cm and r2 = 4.70 cm.)
question an object attached to a spring exhibits simple harmonic motion with an amplitude of 10.0cm. how far from
If the car is now at rest and the pendulum undergoes S.H.M. would its time be shorter of longer than that calculated in (b) explain your answer.
Two hydrogen atoms collide head on. The collision brings both atoms to a halt. Immediately after the collision, both atoms emit a 121.6 nm photon. What was the speed of each atom just before the collision?
one mole of water molecules consists of 1 mole of oxygen (16 g) and 2 moles of hydrogne (1 g each). how many moles of water did you make
If the index of refraction of a plastic prism is 1.6711 ± 0.008467, what is the speed of light as it travels through the prism
a large glass window has an area of 3.00 m2. the earths magnetic field in the region of the window has a magnitude of
The model airplane in Figure 5.7 is flying at a speed of 13.2 m/s on a horizontal circle of radius 17.9 m. The mass of the plane is 1.18 kg. What is the net work done on the plane
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