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When a current flows in an aluminum wire of diameter 4.35 mm, the drift speed of the conduction electrons is 2.57 × 10-4 m/s. What is the electron current in the wire? The conduction electron density in aluminum is 6.00 × 1028 m-3.
Betty Bodycheck (mB = 54.7 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 42.4 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Find both Betty's and Sally's Kinetic Energies
Two point particles of charge Q1 = 46 µC and Q2 = 81 µC are found to have a potential energy of 43 J. What is the distance between the charges
A uniform 1-kg disk with a radius of 25 cm rolls 2 m down an incline plane angled at 25°. What is the speed of the disk at the bottom of the plane
A football is kicked at an angle of 28.4 degrees above horizontal and with an initial speed of 27.9. The ball lands on a level field. Determine The range of the football
A hydrogen atom is in its ground state when its electron absorbs a 48 keV photon. What's the energy of the resulting free electron
A hole is drilled straight through the center of the planet Foosbane. The planet is remarkable in that its density is constant, independent of depth, what is the period of oscillation of the pebble
What is the charge on a 1.0 cm length of wire. What is the net force exerted on the skier.
With its double helix structure, DNA is coiled like a spring. A biophysicist grabs the end of a DNA strand with optical tweezers, What's the DNA spring constant
After a 0.250-kg rubber ball is dropped from a height of 1.80 m, it bounces off a concrete floor and rebounds to a height of 1.20 m. (a) Determine the magnitude and direction of the impulse delivered to the ball by the floor. magnitude? direction?
An amusement ride consists of a car moving in a vertical circle on the end of a rigid boom. The radius of the circle is 32 meters. What is the force of the boom on the car
Starting from rest, a 2.3x10-4 kg flea springs straight upward. While the flea is pushing off from the ground, What is the flea's speed when it leaves the ground
Suppose a capacitor in a video camera has a capacitance of 26.0 ?F, How much potential energy is stored in the capacitor
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