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A given copper wire has a resistance of 5.07 at 20.0°C while a tungsten wire of the same diameter has a resistance of 4.66 at 20.0°C. At what temperature will the two wires have the same resistance?
A baseball (m = 145 g) approaches a bat horizontally ata speed of 40.9 m/s (91.5 mi/h) and is hit straight back at a speedof 51.7 m/s (116 mi/h). If the ball is in contact with the bat fora time of 1.44 ms, what is the average force exerted on the..
The intensity on the screen at a certain point in a double-slit interference pattern is 72.0% of the maximum value. What minimum phase difference (in radians) between sources produces this result
The moon orbits the earth at a distance of 3.85 x 108 m. Assume that this distance is between the centers of the earth, Find the period for the moon's motion around the earth
Define work and energy. State the law known as the work-energy theorem, What are elastic and inelastic collisions
By how much will the earth slow down if its two ice caps melt. Find out how much water the two ice caps contain
A sled of mass m is pushed for 5 seconds at a constant force. A sled of mass M (more) is also pushed for 5 seconds. What is the energy of each sled
A load of weight W is suspended from a cable of length L on a construction vehicle. What is the max angle through which the load swings
One end of a 68-cm-long copper rod with a diameter of 2.4cm is kept at 480?C, and the other is immersed in water at 24?C. Calculate the heat conduction rate along the rod
A bird watcher meanders through the woods, walking 0.30 kilometer due east, 0.80 kilometer due south, and 2.60 kilometer in a direction 33 degree north of west. Find the magnitude and direction of the bird watcher average velocity
A powerful bolt of lightning can carry a current of 225 kA. find the magnitude of the magnetic field produced by such a bolt of lightning at a distance of 93 meter
a 1.40 block is attached to a spring with spring constant 18.0 . while the block is sitting at rest a student hits it
An ALkaline earth atom has 2 valance electrons. Both can be spin up and spin down. Write the singlet states
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