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A point source emits 26.2 W of sound isotropically. A small microphone intercepts the sound in an area of 0.121 cm2, 270 m from the source. Calculate
(a) the sound intensity there and,
(b) the power intercepted by the microphone.
Two forces are applied to a car in an effort to move it, as shown in the following figure, where F1 = 423 N and F2 = 355 N. What is the resultant of these two forces
A 7.38- g bullet is moving at 670.00 m/s as it leaves the 0.62- m-long barrel of a rifle. What is the average force on the bullet
A square loop (edge = 9.4 cm) is comprised of 41 turns of copper wire. The square loop is placed in the plane of the page, What is the magnitude of the induced emf in the square loop
What is the average force felt by a 0.06 kg tennis ball if it strikes the racket at a speed of 30m/s and leaves the racket with a speed of 50m/s in the opposite direction
An object at rest explodes into three peices of equal mass. One moves east at 20 m/s; What is the velocity of the third piece
Find the power factor for an RC circuit connected to a 70.0Hz generator with an rms voltage of 155 V
You are to build a box whose height is 0.280 times its length. what should be the ratio of the width of the box to its length
A 170-turn circular coil has diameter 5.05cm and resistance 1.20? . A magnetic field perpendicular to the coil is changing at 1.20T/s
calculate and compare the energy released by (a) fusion of 1 kg of hydrogen deep within the sun and (b) the fisision of 1 kg U235 in a fission reactor
icyclists in the Tour de France do enormous amounts of work during a race. For example, the average power per kilogram generated by Lance Armstrong (m = 75.0 kg) is 6.50 W per kilogram of his body mass.
A 40 kg child sits in a swing suspended with 2.5 m long rope. Use energy conservation to determine the speed the child will have at the bottom of the arc when she is let go
A tennis ball of mass m=0.057kg and speed v=24 m/s strikes a wall at a 45 degrees angle and rebounds with the same speed at 45 degrees. What is the direction of the impulse given to the ball
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