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In determining the specific heat of a new metal alloy, 150g ofthe substance is heated to 400C and then placed in a 200g aluminium calorimeter containing 400g of water at 10C. If the final temperature of the mixture is 30.5C, what is the specific heat of the alloy?
The current amplitude in an inductor in a radio receiver is to be 250 microA when the voltage amplitude is 3.6V at a frequency of 1.60Hz. What inductive reactance and inductance is needed
A vertical cylindrical tank contains 1.80 mol of an ideal gas under a pressure of 1.00 atm at 20.0oC. how tall is the column of gas that is supporting the piston
A kangaroo jumps vertical into the air and returns to the ground 2.00s later. How high did the kangaroo jump
A blood vessel of radius r splits into four vessels, each wit radius r/3. If the average velocity in the larger vessel is v, find the average velocity in each of the smaller vessels.
A thin rod consists of two parts joined together. One-third of it is silver and two-thirds is gold. The temperature decreases by 31.3 C°. Determine the fractional decrease ?L/(LSilver + LGold) in the rod's length, where LSilver and LGold are the init..
A 50 kg person is riding a Ferris wheel. The Ferris wheel consists of 8 metal cars, each with mass 1500 kg located 15 m from the center. What is the angular acceleration of the Ferris wheel
In a certain automobile engine with an efficiency of 20.1%, combustion of gasoline in one cylinder releases 520 J of heat. Find the total mechanical power produced by all four cylinders, operating at 55 cycles/s, or 3300 rpm
Air molecules in a warm room
compute the linear speed due to the Earth's rotation for a person at a point on its surface located at 40o N latitude (this would be near the Ohio river valley, for instance). The radius of the Earth is 6.40 ξ 106 m. (For comparison, the speed of ..
The tank is shelling at a target that is 4km away and 60m above ground. what should be the release speed of the shell
A 5.20 g pop up toy is compressed 1.50 cm and pops up to the height of 50 cm the spring constant is 270 Nm. What is the loss of energy.
The acceleration of gravity at the surface of the moon is approximately 1/6 that at the surface of the earth (9.8 m/s2). What is the weight of an astronaut standing on the moon
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