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Two railroad cars, each of mass 6500kg and traveling 94 km/h in oppositedirections, collide head-on and come to rest. How much thermal energy is produced in this collision?
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A 16.2 dog is running northward at 2.77 , while a 4.51 cat is running eastward at 3.05. Find the direction and magnitude of the owner's velocity
Big Ben, the Parliament tower clock in London, has an hour hand 2.70 m long with a mass of 300 kg, and a minute hand 4.20 m long with a mass of 100 kg, Calculate the total rotational kinetic energy of the two hands
To a fish, the 4.20 mm thick aquarium walls appear to be only 3.80 mm thick. What is the index of refraction of the walls
The pilot of an airplane traveling 180 km/h wants to drop supplies to flood victims isolated on a patch of land 150 m below. The supplies should be dropped explain how many seconds before the plane is directly overhead?
How much work would be required to move a 0.50 microCoulomb test charge from a point midway between them to a point 12 cm closer to ether of the charges?
Two newly discovered planets follow circular orbits around a star in a distant part of the galaxy. What is the orbital period of the faster planet
A uniform rod of length L and mass M is nailed to a post so that two thirds of its length is below the nail. What is the period of small oscillations of the rod
Water at the top of Niagara Falls has a temperature of 20.0°C. calculate the increase in temperature of the water at the bottom of the falls
Four identical metallic objects carry the following charges: +1.79, +6.21, -4.16, and -9.41C. What is the final charge on each object
The time constant of an RL circuit with L = 25 mH is five times the time constant of an RC circuit with C = 40 µF. What is the time constant of the RL circuit
a car traveling at 95 km/hr. is 210 m behind a truck traveling at 75 km/hr. How long will it take the car to catch the truck
A rocket is launched from the surface of the earth with speed 2.00x104 m/s. What is the speed of the rocket at an infinite distance from the earth
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