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A 50-gram wire that is 3.0 m long is under tension. When a transverse wave of frequency 730 Hz travels down the wire, its wavelength is 0.90 m and its amplitude is 7.4 mm. What is the tension in the wire?
Water at a pressure of 4 atm at street level flows into an office building at a speed of 0.7 m/s through a pipe 5 cm in diameter. Calculate the water pressure in such a pipe on the top floor
A cup of hot coffee is placed inside a large, well-insulated container. Over a five minute period, the entropy of the cup decreases by 100 J/K. What can you say about the entropy of the air surrounding the cup?
The resolution of the eye is eventually limited by the pupil diameter. What is the smallest diameter spot the eye can produce on the retina if the pupil diameter is 3.69 mm? Suppose light with a wavelength of λ = 550 nm.
A girl is using a rope to pull a box that has mass of 30kg across a level surface with constant velocity. What is the normal force of the floor on the box
An electron is moving north in a region where the magnetic field is south. What is the magnetic force exterted on the electron
if the coefficients of static and kinetic friction between the 20kg block a and the 100kg cart b are both essentially
two wires are identical except that one is aluminum and one is copper. the aluminum wire has a resistance of 0.832.
The moon is 3.85Ã-10^8 m from Earth, and it takes 27.3 days to orbit Earth. At what speed is the moon traveling relative to Earth
The intensity (in W/m2) of one sound is 2.97 times as great as the intensity of another sound. Relative to the quieter sound, what is the intensity level of the louder sound
A positively charged particle of mass 5.40 x 10-8 kilogram is traveling due east with a speed of 80 m/s and enters a 0.39 T uniform magnetic field. Find the magnitude of magnetic force acting on particle
Four long straight wires are vertical to the page, and their cross sections form a square of edge length a=13.5cm. All wire carries 7.50 A, and the currents are out of the page in wires1 and 4 and into the page in wires 2 and 3. In unit vector notati..
A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 30.0 m/s. determine the speed of the ball after the ball leaves the bat
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