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A coil with resistance 0.05( and self-inductance 0.01H is connected across a 12-volt battery of negligible internal resistance. a) How long after the switch is closed will the current reach 95% of its final value ? b) At that time how much energy (in Joules) is stored in the magnetic field ? c) How much energy has been delivered by the battery up to that time ?
find frequencies of vibration of the piano wire. Car 1 has 3 times the mass of car 2, but only 0.5 as much kinetic energy. What is the ratio between the speeds of the two cars (v1/v2)? You must type your answer as a numerical value.
A rocket ship at rest in space gives a short blast of its engine, firing 90 kg of exhaust gas out the back end with an average velocity of 700 m/s.
find the minimum thickness for constructive interference of visible light with a wavelength of 595 nm.
A water pipe is inclined 32.0° below the horizontal. The radius of the pipe at the upper end is 3.00 cm. If the gauge pressure at a point at the upper end is 0.117 atm, what is the gauge pressure at a point 2.65 m downstream, where the pipe has narro..
A flat uniform circular disk (radius = 2.40 m, mass = 1.00 x 10^2 kg) is initially stationary. The disk is free to rotate in the horizontal plane about a frictionless axis perpendicular to the center of the disk. A 45.0 kg person, standing 0.95 m fro..
A friend of yours is loudly singing a single note at 410 Hz when racing toward you at 26.1 m/s on a day when the speed of sound is 339 m/s. What frequency does your friend hear if you suddenly start singing at 410 Hz.
Calculate its average velocity for the entire trip. A horse canters away from its trainer in a straight line, moving 120 m away in 15.0 s. It then turns abruptly and gallops halfway back in 5 s.
Airtight box has a removable lid of area 1x10-2m2 and negligible weight. The box is taken up a mountain where the air pressure outside the box is 0.85x 10^5Pa. The inside of the box is completely evacuated. What is the magnitude of the force essen..
Sherlock Holmes examines a clue by holding his magnifying glass (with a focal length of 15.0 cm) 10.0 cm away from an object. Find the image distance and the magnification. explain the image that he observes.
The resolution of the eye is ultimately limited by pupil diameter. What is the smallest diameter spot an eye can produce on the retina if pupil diameter is 4.45? Assume light with a wavelength of = 600 .
A 4.1kg bucket of water is raised from a well by a rope. If the upward acceleration of the bucket is 3.3m/s2, find the force exerted by the rope on the bucket.
Refrigerant-134a enters a compressor at 180 kPa as a saturated vapour with a flow rate of 0.35 m3/min and leaves at 700 kPa. The power supplied to the refrigerant during compression process is 2.35 kW. What is the temperature R-134a at the exit of th..
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