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An amplifier supplies 5.0 Watts to a perfectly efficient loudspeaker at one end of a 10.0 cm diamter tube filled with air.
What is the intensity of the sound at the other end of the tube?
What is the intensity 10 m in front of the tube (approximate the wavefront to be a hemisphere moving outward in the direction that the loudspeaker is pointing). If the frequency of the sound is 250 Hz, how far apart are the wavefronts? The speed of sound is 340 m/s.
The TGV, France's high-speed train, pulls out of the Lyons station and is accelerating uniformly to its cruising speed. find the acceleration of the train and the tension in the strap
Two rubber bands cause an object to accelerate with acceleration a. How many rubber bands are needed to cause an object with half the mass to accelerate five times as quickly
A glass block (n = 1.56) is immersed in aliquid. A ray of light within the glass hits a glass-liquid surfaceat a 63.0° angle of incidence. What is the smallest possiblerefractive index for the liquid
A uniform drawbridge must be held at a 37.5 degree angle above the horizontal to allow ships to pass underneath. Find the direction of the force the hinge exerts on the bridge
A 1.00 m3 container of air absorbs 6098 J of heat at a constant pressure of 1.00 atm. Air has a density of 1.20 kg/m3, Find the increase in the temperature of the air
A high-speed photograph of a club hitting a golf ball is shown in the figure below. find the average force exerted on the ball by the club
A tennis ball is thrown out a window 28m above the ground at an initial velocity of 15.0 m/s and 20 degrees below the horizontal. How far does the ball move horizontally before it hits the ground?
If the balloon can barely lift an additional 2900N of passengers, breakfast, and champagne when the outside air density is 1.23kg/m3, FIND the average density of the heated gases in the envelope
A hollow sphere is rolling along a horizontal floor at 5.00 when it comes to a 39.0 incline. How far up the incline does it roll before reversing direction
A copper pot sits on a hot plate that is at a remperature of 140 C, How long before one half the pots contents evaporate
A basketball of mass 610g and circumference 76cm is rolling without slipping on a gym floor. Treating ball as a hollow sphere, what fraction of its total kinetic energy is associated with its rotational motion.
The electric field everywhere on the surface of a thin, spherical shell of radius 0.785 m is of magnitude 850 N/C, What is the net charge within the sphere's surface
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