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An AC power generator produces51A (rms) at 3600 V. The voltage is stepped up to 100000 V by an ideal transformer, and the energy is transmitted through a long-distance power line that has a resistance of96. What percentage of the power delivered by the generator is dissipated as heat in the power line?
a 30kg child wants to use a 20kg board that is 6.0m long as a seesaw. since all her friends are busy, How far from her will the support be
A car is traveling at 29m/s when the driver spots a large pothole in the road the distance 37 m ahead. She immediately applies her brakes. If her acceleration is -6.60m/s2, does she manage to stop before reaching pothole.
The vibrational spectrum of the H2 molecule has lines separated in frequency by 1.3x1014 Hz. determine the maximum length of the bond
An electromagnet produces a magnetic field of 0.540T in a cylindrical region of radius 2.70cm between its poles. What magnitude of force is exerted on the wire
what force is required to slow a 1250kg car traveling 115km/h to 30km/h within 3.50 s? how far does the car travel during its deceleration
A car moving at 10 m/s encounters a bump that has a circular cross-section with a radius of 30 m. What is the normal force exerted by the seat of the car on a 60-kg passenger
An electric field E with an average magnitude of about 150 N/C points downward in the atmosphere near Earth's surface. What charge (both sign and magnitude) must be used
The radius of a park merry-go-round is 2.4 m. To start it rotating, you wrap a rope around it and pull with a force of 260 N for 11 s. What is the moment of inertia of the merry-go-round
The drawing shows a block at rest on an incline. What is the static frictional force that acts on the block
A high-speed flywheel in a motor is spinning at 450 rpm when a power failure suddenly occurs. The flywheel has mass 37.0kg and diameter 71 cm. The power is off for 27.0s and during this time the flywheel slows due to friction in its axle bearings...
A cube has sides of length = 0.320 . It is placed with one corner at the origin. The electric field is not uniform but is given by -4.95 2.17 .Find out the electric flux through each of the six cube faces.
A spring of stiffness 25 kN m-1 is compressed by an initial load of 5 kN, gradually applied, What is the total work done on the spring
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