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Q.When two tuning forks of 127 Hz and 133 Hz, respectively, are sounded simultaneously how many beats per second are heard? Answer in units of beats = s
Q. A 4.00 {rm A} current runs through a 12-gauge copper wire (diameter 2.05 {rm mm}) and through a light bulb. Copper has 8.5 times 10^{28} free electrons per cubic meter.
How many electrons pass through the light bulb each second?
What is the current density in the wire?
At what speed does a typical electron pass by any given point in the wire?
If you were to use wire of twice the diameter, which of the above answers would change? Would they increase or decrease?
Charge is scattered uniformly throughout a long cylindrical shell of inner radius R and out radius 2R. At what radius is the electric field equal to one-half the value on the outer surface.
On a workday an average decibel level of the busy street is 89 dB, with 100 cars passing a given point every minute. If the number of cars is reduced to 30 every minute on a weekend, what is the decibel level of street.
charge of -2.95 µC is fixed at the center of a compass. Two additional charges are fixed on the circle of the compass, which has a radius of 0.097 m. The charges on the circle are -3.85 µC at the position due north and +5.20 µC at the position due ea..
What is the coefficient of static friction
A metal rod of mass 50 and electrical resistance 0.10 rests on parallel horizontal rails that have negligible electric resistance. The rails are a distance = 10.0 apart. The rails are also connected to the voltage source providing a voltage of = 5..
Write three methods of increasing the volume of a balloon
W hat is the magnitude of an average force exerted on the superball by the sidewalk. what is force caused by the water on the bottom.
A flight attendant pulls her 65N flight bag a distance of 388m along a level airport floor at a constant velocity. The force she exerts is 38 N at an angle of 51° above horizontal.
A 2.16 kg block on a horizontal floor is attached to a horizontal spring that is initially compressed 0.0320 m. The spring has force constant 840 N/m.
An airplane is flying with a velocity of 81.0 m/s at an angle of 24.0^circ above the horizontal. When the plane is a distance 108m directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment.
A 0.38 kg iron horseshoe that is initially at 580°C is dropped into a bucket containing 21.8kg of water at 21 °C. What is the final equilibrium temperature (in °C)? Avoid any heat transfer to or from the surroundings. Do not enter units.
An electric field of 254,000 N/C points due west at the certain spot. What are the magnitude and direction of the force that acts on the charge of -8.1 µC at this spot.
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