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An aluminum wire having a cross-sectional area equal to 5.10 10-6 m2 carries a current of 3.50 A. The density of aluminum is 2.70 g/cm3. Assume each aluminum atom supplies one conduction electron per atom. Find the drift speed of the electrons in the wire.
The focal length of a simple magnifier is 7.60 cm. Assume the magnifier to be a thin lens placed very close to the eye. what is the height of its image formed by the magnifier
How is the voltage divided among resistors in parallel and What happens to resistance when resistors are connected in parallel
a block 20cm wide by 60 cm long balances (symetrically on a similar block which is fixed to the ground. What is the mass of the upper block
The hydraulic cylinder is subjected to 3 forces. An 8kN force is exerted on cylinder at B that is parallel to the cylinder and points from B towards C. The link AC exerts the force at C that is parallel to the line from A to C. The link CD exerts ..
A helium-neon laser emits light of wavelength 632.8 nm and has a power output of 13 mW. How many photons are emitted per second by this laser
A car traveling east and a minivan traveling south collide in a completely inelastic collision at a perpendicular intersection. what is the speed of the vehicles immediately after collision
A 1650-kg car is travelling at 31.2 m/s. How fast must a 91.0-kg bicycle and rider be travelling to have the similar kinetic energy as the car.
How many kilocalories of heat are produced when the brakes are used to bring a 930 kg car to rest from a speed of 102 km/h.
Two point charges 3.0cm apart have an electric potential energy -130J . The total charge is 15nC. What is the lesser charge
Jack and Jill are standing on a crate at rest on the frictionless, horizontal surface of a frozen pond. Jack has a mass of 75.8kg, What is the final speed of the crate if both Jack and Jill jump simultaneously and in the same direction
A 42.5 mA current is carried by a uniformly wound air-core solenoid with 425 turns, a 19.5 mm diameter, and 13.0 cm length. Compute the inductance of the solenoid
When responding to sound, the human eardrum vibrates about its equilibrium position, what is the frequency (in Hz) of the eardrums vibration
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