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A sound source approximated as a point radiates sound equally in all directions. At a distance of 5.2 m from the source, the intensity is 3.5 x 10-3 W/m2. See example 15.5
a) What is the intensity 2.0 m from the source?
b) What is the total power of the source (intensity x area)? The area of a spherical shell is 4?r2.
A damped mass-spring system oscillates at 265 -Hz. The time constant of the system is 2.0 s. At t = 0, the amplitude of oscillation is 6.1 cm and the energy of the oscillating system is then 61.00 J.
Calculate the force of gravity on a spacecraft 25600 km (4 earth radii) above the Earth's surface if its mass is 1500 kg
An ac series circuit has an impedance of 178 ? , and the phase angle between the current and the voltage of the generator is ? = -74°, find the capacitive reactance XC or the inductive reactance XL, whichever is appropriate
q1. the flywheel of an engine has a moment of inertia 2.80 rm kg cdot rm m 2 about its rotation axis. what is its
In SI units, the electric field in an electromagnetic wave is described by Ey = 100 sin(107x - ?t ). What is the frequency of the EM wave
A copper block is suspended from a wire, as in part 1 of the drawing. A container of mercury is then raised up around the block, Find the ratio of the fundamental frequency of the wire in part 2 to the fundamental frequency in part 1
Find the power in sideband, total power, carrier power, carrier rms voltage and the peak voltages for carrier and sidebands of AM transmitter.
In a certain automobile engine, 17% of the total energy released in burning gasoline ends up as mechanical work. What is the engine's mechanical power output if its heat output is 78 kW
A line of charge with uniform density of 32.0 nC/m lies along the line y = -15.0 cm, Find the electric field it creates at the origin
Two equally charged insulating balls each weigh 0.26 g and hang from a common point by identical threads 25 cm long. find the magnitude of the charge on each ball
You're riding on a carousel ("merry-go-round") that is rotating at a constant 6.00 rpm. By what factor (multiplier) have you changed the magnitude of your total acceleration
For a movie scene, a 76kg stuntman drops from a tree onto a 51kg sled that is moving on a frozen lake with a velocity of 13m/s toward the shore. with what speed does he leave the sled
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