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You have a 1.93-m-long stretched string with a mass of 19.5 g. When you oscillate the string at 440 Hz, which is the frequency of the standard A pitch that orchestras tune to, you observe transverse waves with a wavelength of 16.7 cm traveling along the string. Calculate the tension in the string.
A spring has of constant k=1200 N/m is compressed by 8.0cm. A 2.5kg block is placed against the compressed spring. find the resulting kinetic energy and speed of the block
Two loudspeakers in a plane, 5 m apart, are playing the same frequency. If you stand 12 m in front of the plane of the speakers, What is the frequency of the sound
Two children fighting over a toy pull on the toy in different directions. One child pulls to the north with a force of and the other child pulls to the east with a force of What is the magnitude of net force on the toy.
A 20 kg block is stacked on top of the 20 kg block. Both blocks are glued together. What is the magnitude F of force, acting horizontally on the two blocks, that is required to make the two blocks start to move.
A pressure as low as P = 8 ? 10-11 Pa has been obtained. Suppose a chamber contains helium at this pressure and at room temperature, Estimate the mean free path
Two identical positive charges exert a repulsive force of 6.2 multiplied by 10-9 N when separated by a distance of 3.4 multiplied by 10-10 m. Calculate the charge of each.
Suppose a star experiences an outburst in which its surface temperature doubles but its average density, By what factors do the star's radius and luminosity change
A helicopter, starting from rest, accelerates straight up from the roof of a hospital. The lifting force does work in raising the helicopter. What is the average power generated by the lifting force
What is the maximum mass of ethyl alcohol you could boil with 1000 J of heat, starting from 15 deg C
A hiker's trip consists of three segments. Path A is 9km long heading 60.0° north of east. Path B is 6.0km long in a direction due east. Path C is 5.0 km long heading 315° counter clockwise from east.
A 10,000 kg railroad car is rolling at 2 m/s when a 400 kg load of gravel is suddenly dumped in. What is the railroad cars speed just after the gravel is dumped in.
Find out an acceleration of mass and tension in the string
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