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A 18-cm-long nichrome wire is connected across the terminals of a 1.5V battery. If the current in the wire is 3.0A , what is the wire's diameter?
The rms current in an ac circuit with a resistance of 140 is 0.88 A. What is the average power consumed by this circuit
rate at which mechanical energy is transferred to the turbine blades, assuming 60 percent efficiency.
A 0.48-kg object connected to a light spring with a force constant of 23.6 N/m oscillates on a frictionless horizontal surface. The spring is compressed 4.0 cm and released from rest.
A 2.00-m tall basketball player is standing on the floor 10.0 m from the basket. If he shoots the ball at a 30 degree angle from the horizontal, at what initial speed must he throw the ball so that it goes through the basket without striking the back..
Two point charges, +5.0 µC and ?3.0 µC, are separated by 4.0 m. What is the electric potential energy?
Imagine that the coefficient of kinetic friction between a certain 15kg box and the floor is 0.35. How hard would you have to push on it to move it at the constant speed of 2.6m/s across the floor.
A 3000-kg Ferris wheel accelerates from rest to an angular speed of 0.17rad/s in 11s, calculate the net torque on the wheel
Evaluate the magnitude of the acceleration of each mass. What percentage of error in would be made if the moment of inertia of the pulley were ignored? Ignore friction in the pulley bearings.
Consider an athlete who jumps a horizontal distance of 9m after reaching a maximum height of 1.5m. What was the takeoff speed v0 of the athlete
A 1200-turn coil of wire that is 2.0cm in diameter is in a magnetic field that drops from 0.14T to 0 T in 11ms. What is the emf of the coil
A block of mass 12-kg slides from rest down a frictionless 34° incline and is stopped by a strong spring with k = 1.0x 10^4 N/m. The block slides 3 m from the point of release to the point where it comes to rest against the spring.
Consider a parallel-plate capacitor of 220 uF capacitance connected to a 1500 volt power source. The distance between the plates is .01 m. What is the charge in the capacitor
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