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At a recent rock concert, a dB meterregistered110dB when placed2.00m in front of a loudspeaker on the stage.
(a) What was the power output of the speaker, assuming a hemispherical radiation of the sound and neglecting absorption in the air?
A basketball of mass 270 g and radius 17 cm rolls with an initial speed of 2.5 m/s. What distance along the ramp will the ball travel before it comes to a stop
an object is at a distance d to the left of a flath screen. A converging lens with focal length f
A 723-N person stands on a uniform board of weight 282 N and length 6.1 m. How far from the left end of the board is the person standing
A motorist drives south at 22.0 m/s for 3.00 min, then turns west and travels at 25.0 m/s for 3.00 min, Find the total vector displacement and south west
A 75 N/m spring is suspended vertically with nothing attached to it and rests at equilibrium. Then a mass is attached to the spring and given a nudge. Determine the mass attached to the spring
Object A has a position as a function of time given by A(t) = (3.00 m/s)t + (1.00 m/s2)t2, What is the distance between object A and object B at time t = 4s?
Your little brother is sitting in a wagon playing with his toys. what was the velocity of the football when you threw it towards your brother
x = 2 + 3t - t^2, Where x is in meters and t is in seconds, Determine At the time is the object at rest
A freezer is used to freeze 2.0 L of water completely into ice. The water and the freezer remain at a constant temperature of T = 0 C, Determine the change in the entropy of the freezer
Calculate the amplitude of the voltage pulse produced by collecting a charge equal to that carried by 10^6 electrons on a capacitance of 100 pF
A long solenoid (diameter = 4.00 cm) is wound with 1500 turns per meter of thin wire through which a current of .220 A is maintained. A wire carrying 5.00 A is inserted along the axis of the solenoid.
A magnetic field is perpendicular to a 0.0417 m x 0.0636 m rectangular coil of wire that has 108 turns, What is the magnitude of the change in the magnetic field
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