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A steel rod (ρ = 7860 kg/m3) has a length of2.55 m. It is bolted at both ends between immobile supports.Initially there is no tension in the rod, because the rod just fitsbetween the supports. Find the tension that develops when the rodloses 3490 J of heat.
A man is riding in a cart with mass M at speed v along a frictionless horizontal surface. what is the mass of the man
A car is traveling down a hill that makes an angle of 13° with the horizontal. The driver applies her brakes, evaluate the acceleration of the car
One runner covered the 100-m dash in 10.9 s. Another runner came in second at a time of 11.4 s, determine the separation between the two runners when the winner crossed the finish line
A spider hangs from a strand of silk whose radius is5.8x10-6 m.The density of the silk is 1100 kg/m3.When the spider moves, waves travel along the strand of silk at aspeed of 310 m/s. Determine the mass of the spider.
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0618 s, during which time it experiences an acceleration of 326 m/s2. The ball is launched at an angle of 57.3° above the ground. Determine..
q1. a proton moves perpendicular to a uniform magnetic field at a speed of 1.80 x 107 ms and experiences an
An unresolved binary system consists of two stars, one has V = 6.00 and (B-V) = .22, and the second star V = 8.50 and (B-V) = 0.12 a) what is the V and B flux density of each star? b) what is the apparent V and B magnitude of the combined system?
the head of the hammer m1.5kg moving at 4.5 ms strikes a nail and bounces back with the same speed after an elastic
A 56.0-kg projectile is fired at an angle of 30.0° above the horizontal with an initial speed of 1.24 102 m/s from the top of a cliff 146 m above level ground, What is the initial total mechanical energy of the projectile
Consider a circuit with a main wire that branches into twoother wires. If the current is 10 amperes in the main wire and 4amperes in one of the branches, how much current is in the other branch
if the human body has a total surface area of 1.20 m2 and the surface temperature is 30degc find the total net rate of
A bat emits a sound whose frequency is 70.9 kHz. The speed of sound in air at 20.0 oC is 343 m/s. However, the air temperature is 40.4 oC, find the wavelength of the sound
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