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In a wire with a 1.67-mm2 cross-sectional area, 8.43 × 1020 electrons flow past any point during 3.87 s.
A. What is the current in the wire?
B. Find the current density.
A novice skier, starting from rest, slides down a frictionless 37.0° incline whose vertical height is 175 m. Explain how fast is she going when she reaches the bottom?
A uniform disk has a mass of 3.7 kg and a radius of 0.40 m. The disk is mounted on frictionless bearing and is used as a turntable. What is the final angular momentum of the system
An air traffic controller has two aircraft on radar. The first is at an altitude of 0.5 km, a horizontal distance of 3 km measured along the ground to the point directly underneath the plane, and a bearing of 115° west of north.
Calculate the velocity of a 50.0g steel ball shot from a slingshot with a 120N/m spring constant when pulled back 35cm and released
A river has a steady speed of 0.25m/s. A student swims upstream a distance of 1 km and swims back to the starting point. If the student can swim at the speed of 1.4m/s in still water.
When the front of the train passes the worker. A 1500 kg car moving north at 27.0 m/s is struck by a 2165-kg car moving east at 18.0 m/s. The cars are stuck together. How fast and in what direction do they move immediately after the collision.
A 2500lb car collides with a 25,000 lb truck. What force is exerted on the car by the truck
A roller coaster is traveling along a vertical circular loop, How much work is done by the frictional force from Position 1 to Position 2
Tam walks with the velocity of 1.8 m/s west. He does so while riding on a conveyor belt that moves at a velocity of 0.7 m/s west. What is Tam's velocity.
An asteroid is in a nearly circular orbit of radius 5.668 AU about the Sun. Determine the period of this asteroid
A straight ladder is leaning against the wall of a house. Theladder has rails 4.40 m long,joined by rungs 4.500 m long. What should be the thicknessof the flat rock
The activity of a radioactive source decreases by 5.2% in 28 hours. What is the half-life of this source
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