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Two violins are supposed to be playing concert A, at 440 Hz [{\rm Hz}] . One of them is right on, but the other's frequency is 439.1Hz [Hz]
What beat frequency do the violinists hear?
A circuit contains six 205 ohm lamps with 60 W bulbs and a 9 ohm heater connected in parallel. voltage across the circuit is 120 V.what is the current in the circuit when four lamps are turned on.
A sound source emits sounds of frequency 210Hz that travel by still air at 340m/s. The listener moves at 75 m/s relative to still air toward the stationary source. What is wavelength of the sound between the source and the listener.
An alpha particle and beta^ {-} particle, each with kinetic energy 35 {rm keV}, are sent through a 1.10 {rm T} magnetic field. The particles move perpendicular to the field. Find the curvature radius for alpha particle's trajectory. Hint: The kine..
Estimate the force P to accelerate the 80 - Ib block at 6ft/sec2 to the right.
A pyramid has a square base and four faces which are equilateral triangles. A charge Q is placed on the center of the base of the pyramid, What is the net flux of electric field
An electric scooter has a battery capable of supplying 140 Wh of energy. If friction forces and other losses account for 60 percent of the energy usage, what altitude change can a rider achieve while driving in hilly terrain, if the rider and scooter..
Find out direction and magnitude of force
In one form of plethysmograph (a device for measuring volume), a rubber capillary tube with an inside diameter of 1.22 mm is filled with mercury at 20°C, Calculate the resistance of the mercury
In open heart surgery a much smaller amount of energy will defibrillate the heart, What voltage is applied to the 9.00 µF capacitor of a heart defibrillator that stores 55.0 J of energy
Three point charges are located on the positive x-axis of a coordinate system. Charge q1 = 2.0 nCis 2.0 cm from the origin, What is the net force
A point charge with charge q1 = 2.00?C is held stationary at the origin, How much work W is done by the electric force on the moving point charge
Daisy throws a rock horizontally with a speed of 12 m/s from a bridge. It falls 2.28 s before reaching the water below. When the rock hits the water it is traveling with what horizontal component of the velocity.
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