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A spring is stretched between two posts. When a pulse is produced at one end of the spring, it makes 4 back-and-forth trips along the spring in 3.4 s. If the pulse has a propagation speed of 12 m/s, how far apart are the posts?
A steel wire with mass 29.7 g and length 1.52 m is strung on a bass so that the distance from the nut to the bridge is 1.10 m. Compute the linear density of the string
Hoursehoe bats use the Doppler effect to determine their location. A horsehoe bat flies towards a wall at a speed of 16.0 m/s while emitting sound of frequency 39.0kHz. What is beat frequency between the emission frequency and the echo? ____________ ..
2 crewmen pull a raft, 1 crewman pulls with a force of 130 newtons at 34 degreees relative to the forward position on the raft. the 2nd crewman on the opposite side pulls at 45 degrees. Illustrate what force should the 2nd crewman pull so that the..
q1. consider a too-small space station that consists of a 3.8 m radius rotating sphere. a man standing inside is 1.9 m
The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter, Find the power consumed by the air filter
What is the speed of an electron with a de Broglie wavelength of 0.140nm and 0.140nm
A mechanic pushes a 2.80 103-kg car from rest to a speed of v, doing 4,650 J of work in the process. During this time, the car moves 26.0 m. calculate the horizontal force exerted on the car
When light of wavelength 380 nm falls on a cesium surface, electrons having a maximum kinetic energy of 1.13 eV are emitted. find the frequency corresponding to the cutoff wavelength
The distance from earth to the center of our galaxy is about 30,000 light years (1 ly = 1 light year = 9.47 x 10^15 m), how long will it take to make the trip
A passenger plane lands on the runway at 300kmhrô???1. In a glass of water in the cabin, calculate the deceleration of the plane
A train moving with constant velocity travels 180 meters north in 14 seconds and an undetermined distance to the west. compute the direction of the train's motion relative to north
A rigid tank contains 1.30 moles of an ideal gas. Determine the number of moles of gas that should be withdrawn from the tank to lower the pressure of the gas from 24.5 atm to 4.40 atm. Assume volume of the tank and the temperature of the gas rema..
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