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1. An inductor that has an inductance of 15.0 H and resistance of 30.0 W is connected across a 100-V battery. Calculate the rate of increase of the current at time t = 0 and t = 1.50 s
The power is off for 34.0 s and throughout this time the flywheel slows as a result of friction in its axle bearings. Throughout the time the power is off, the flywheel makes 180 complete revolutions.
A person is drinking water from a plastic bottle. When the water level is 6cm from the top of the bottle, the person blows across the top producing a sound
A rigid steel frame above the street intersection supports standard traffic lights, each of that is hinged to hang immediately below frame. A gust of wind sets light swinging in a vertical plane. Find out order of magnitude of its period. Situatio..
The battery has internal resistance of 0.100 Ω, and the rod and rails have negligible resistance. A 2.02 T magnetic field is directed perpendicular to the plane of the circuit. Find the magnetic force on the rod. F= 38.78 N. Find out the rod's spe..
Would you expect to get a more accurate value for m using Equation m = h'/h in the situation where the lens is closest to the object or in the situation where the lens is furthest from the object?
An exoplanet of mass 7.4e26 kg orbits its parent star at an angle of inclination of 28.9 degrees. determine the period of the exoplanet in days
A 2.47 kg steel ball strikes a massive wall at 11.7 m/s at an angle of alpha = 67.2° with the plane of the wall. It bounces off with the same speed and angle. If the ball is in contact with the wall for 0.218 s, what is the magnitude of average force..
A student sits on a rotating stool holding two 3kg objects. When his arms are extended horizontally, the objects are 1m from the axis of rotation.
A horizontal aluminum rod 4.8 cm in diameter projects 5.6 cm from a wall. A 1200 kg object is suspended from the end of the rod, Find the shear stress on the rod
How many 119W light bulbs can you use in a 134V circuit without tripping a 15 A circuit breaker? (The bulbs are connected in parallel that means that the potential difference across each light bulb is 134 V.)
A hiker, who weighs 919 N, is strolling through the woods and crosses a small horizontal bridge. The bridge is uniform, weighs 4410 N, and rests on two concrete supports, one on each end. He stops 1/3 of the way along the bridge.
An object whose weight is 100 Ibf experiences a decrease in kinetic energy of 500 ft. Ibf and an increase in potential energy of 1600 ft. Ibf. The initial velocity and elevation of the object, each relative to surface of the earth, are 50 ft/s and 40..
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