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A source of AC voltage with a frequency of 60 Hz and an RMS voltage of 120 V is connected to a light bulb. Find the shortest time in seconds required for the voltage across the light bulb to reach 170 V.
A student at another university repeats the experiment you did in lab. Her target ball is 0.860 m above the floor when it is in the target holder, What is the kinetic energy (in joules) of the target ball just after it is struck
An unstretched spring with spring constant 21 N/cm is suspended from the ceiling. A 3.3 kg mass is attached to the spring and let fall. To the nearest tenth of the centimeter, how far does it stretch the spring.
Estimate the thickness of lead shielding needed to reduce the exposure rate 2.5 m from a 5.92x10^11 Bq point source of Cs-137 to 1.0 mR/hr.
A person scuffing her feet on a wool rug on a dry day accumulates a net charge of -42 µC. How many excess electrons does she get, and by how much does her mass increase?
The magnetic field perpendicular to a single 14cm diameter circular loop of copper wire decreases uniformly from 0.750 T to zero. If the wire is 2.25 mm in diameter, how much charge moves past a point in the coil throughout this operation.
A heart defibrillator passes 10.5 A through a patient's torso for 5.00 ms in an attempt to restore normal beating, How much charge passed
In a car collision, the driver's body must change speed from a high value to zero. This is true whether or not an airbag is used, How does it reduce injury
A horizontal block-spring system with the block on a frictionless surface has total mechanical energy E = 49.2 J and a maximum displacement from equilibrium of 0.280 m.
Two sound sources radiating in phase at a frequency of 560 Hz interfere such that maxima are heard at angles of 0 and 25° from a line perpendicular to that joining the two sources. Find out the separation between the two sources. (Wave velocity of..
An electron passes through a point 3.27 cm from a long straight wire as it moves at 37.3% of the speed of light, Find the magnitude of the electron\'s acceleration at that point
The index of refraction for crown glass is 1.512 at a wavelength of 660 nm (red), whereas its index of refraction is 1.530 at a wavelength of 410 nm (violet), what is the angle of refraction for each wavelength
A resonant circuit in a radio receiver is tuned to a certain station when the inductor has a value of 0.196 mH and the capacitor has a value of 28.2 pF. Calculate the frequency of the radio station
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