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1000 gallons per minute of fluid flows through a 3 inch diameter pipe. what is the average velocity of the water?
Two speakers, one directly behind the other, are each generating a 429-Hz sound wave. What is the smallest separation distance between the speakers that will produce destructive interference at a listener standing in front of them? Take the speed of ..
A proton and an alpha particle are released from rest when they are 0.225nm {\rm nm} apart. Find the maximum speed of proton
A mass of 125g is suspended from a spring of a spring constant of 38N/m. When this mass is pulled down 3mm and set in oscillation, what is the period and frequency of the oscillation? How different would be both, the period and frequency, if the m..
A cannon fires a cannon ball with an Inital speed of 67 m/s at an angle of 35 degrees above the horizontal. what is the inital vertical velocity of the cannon ball
Two parallel slits are illuminated by light composed of two wavelengths, one of which is 654 nm. What is the unknown wavelength
A 10000 N car comes to a bridge during a storm and finds the bridge washed out. How fast should the car be traveling just as it leaves the cliff in order to clear the river and land safely on the opposite side
A 17-cm-long microscope has an eyepiece with a focal length of 3.1cm and an objective with a focal length of 0.35cm. What is the approximate magnification
A siren at rest has a frequency f0. Standing at a crosswalk, a student hears a frequency f' from the siren in an approaching police car. find the speed of the car
The radius of a black hole is approximately 3 km times the mass of the black hole in solar mass units. If a galactic black hole has a mass of 1 million solar masses what is its diameter in A.U.s? For an accretion disk 10 times the radius of this blac..
q1. if 25grams of water at 100 degrees celsius are mixed with 15 grams of water at 40 degrees celsius what temperature
The arm in Coulomb's torsion balance was a rod with a charged ball at one end and a counterweight on the other. what is the torque exerted on the balance arm
A bumper car with mass m1 = 109.0 kg is moving to the right with a velocity of v1 = 4.9 m/s. A second bumper car with mass m2 = 84.0 kg is moving to the left with a velocity of v2 = -3.6 m/s. The two cars have an elastic collision. Assume the surf..
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