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5kg of lead shot at 89.3 degrees are poured into 5kg of water at 22.0 degrees. Discover the final temperature (in degrees C) of the mixture. Use c_water = 4187 J/kg degrees C and c_lead = 128 J/kg degrees C Use units of "C".
A team of dogs drags a 130 kg sled 1.91 km over a horizontal surface at a constant speed. Find the work done by the dogs
a plane leaves the airport in galisto and flies 155 at 68.0east of north and then changes direction to fly 270 at
Lasers have been used to suspend spherical glass beads in the Earth's gravitational field. What is the minimum power required for this laser
A length of aluminum wire has a resistance of 10.0 ? at 32.0°C. When the wire is warmed in an oven and reaches thermal equilibrium, the resistance of the wire increases to 26.2 ?. find the temperature of the oven
A 100 W lightbulb is plugged into a standard 120V outlet. How much does it cost per month (30 days) toleave the light turned on continuosly?
A wire 6.70m long with diameter of 2.10mm has a resistance of 0.0250 ohm. Find the resistivity of the material of the wire
calculate and compare the electron densities of a piece of aluminum 1 cm thick and a piece of iron of the same density
A 10-cm-diameter cylinder of helium gas is 20 cm long and at 20°C. The pressure gauge reads 120 psi. what is the mass of the helium
A copper wire has a length of 50 meters and diameter of 1.6 mm. Copper has a resistivity of 1.68 x 10^-8 ohm. Calculate the resistance of the wire
the formulas for the ?uorides of some second period elements are lif bef2 bf3 and cf4. which is the correct formula for
A person on earth notices a rocket approaching from the right at a speed of 0.71 c and another rocket approaching from the left at 0.67 c. What is the relative speed among the two rockets, as gauged by a passenger on one of them?
In an experiment designed to measure the speed of light, a laser is aimed at a mirror that is 59.0 km due north. A detector is placed138 m due east of the laser. The mirror is to be aligned so that light from the laser reflects into the detector.
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