What percentage change in tension of one of strings
The corresponding violin strings on two violins in an orchestra are found to produce a beat frequency of 2 Hz when a frequency of 660 Hz is played. What percentage change in the tension of one of the strings would bring them to the same frequency?
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Coyote launches himself across the gorge with the same initial speed but at a different launch angle. To his horror, he is short of the other lip of .5 m. What was his launch angle?
What is the difference between total and average molecular kinetic energy of a gas contained in a box.
Three identical train cars, coupled together, are rolling east at 1.2 m/s . A fourth car traveling east at 4.4 m/s catches up with the three and couples to make a four-car train. A moment later, the train cars hit a fifth car that was at rest on t
A 0.140-kg baseball traveling 40.0m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 16.0cm. What is the force applied by the ball
A person exerts a horizontal force of 33 N on the end of a door 94 cm wide. What is the magnitude of the torque if the force is exerted perpendicular to the door?
The highest musical note on a piano has a frequency of 4,186Hz. Why would a tape of piano music sound terrible if played on a tape player that reproduces frequencies only up to 5,000Hz?
Suzie (of mass 50 kg) is roller-blading down the sidewalk going 20 miles per hour. She notices a group of workers down the walkway who have unexpectedly blocked her path, and she makes a quick stop in .5 seconds. What is Suzie's average accelerati
A 465 g ball swings in a vertical circle at the end of a 1.3 m-long string. When the ball is at the bottom of the circle, the tension in the string is 21 N. What is the speed of the ball at that point?
An air-track glider attached to a spring oscillates with a period of 1.50s . At t=0s the glider is 5.60cm left of the equilibrium position and moving to the right at 40.6cm/s .
Air is flowing through a rocket nozzle. Inside the rocket theair has a density of 5.25kg/m^3 and a speed of 1.2 m/s. Theinterior diameter of the rocket is 15.0 cm. At the nozzle exit, thediameter is 2.5 cm and the density is 1.29kg/m^3. What is th
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