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A well with vertical sides and water at the bottom resonates at 7.00 Hz and at no lower frequency. (The air filled portion of the well acts as a tube with one closed end and one open end.) The air in the well has a density of 1.10 kg/m^3 and a bulk modulus of 1.33 x 10^5 Pa. How far down in the well is the water surface?
A rocket burns fuel at a rate of 200 kg/s and exhausts the gas at a relative speed of 4.0 km/s. Find the thrust of the rocket
Four identical particles each have charge q and mass m. They are free from rest at the vertices of a square of side L. How fast is each charge moving when their distance from center of the square doubles.
Time standards are now based on atomic clocks. A promising second standard is based on pulsars, which are rotating neutron stars (highly compact stars consisting only of neutrons).
A 20.0L tank contains 0.225kg of helium at 18.0%u2218C. The molar mass of helium is 4.00g/mol. How many moles of helium are in the tank
an artillery shell is fired with an initial velocity of 350 m/s at 50.0 degrees measured from the horizontal. it hits the side of a mountain 35.0 seconds later. What are the x and y coordinates of the shell where it explodes, if the coordinates fr..
q1. assuming she was dropped from a height of 290 and that superman can accelerate straight upward at 18.0 determine
Two unequal point charges q1 and q2 are held in place unconnected from each other. A point charge Q is placed somewhere between them at a point where it remains stationary when free. From this observation, we can conclude that q1 and q2 must eithe..
A proton moves perpendicularly to a uniform magnetic ?eld B with a speed of 1.9 × 10 ^7 m/s and experiences an acceleration of 8 × 10 12 m/s 2 in the positive x direction when its velocity is in the positive z direction. The mass of a proton is 1...
A suitcase is pulled by a tether that makes a 60 degree angle with the horizontal. what is the magnitude of the pull
An expandable cylinder has its top connected to a spring with force constant 2 x10^3 N/m. The cylinder is filled with 6 L of gas with the spring relaxed at a pressure of 1.0 atm and a temperature of 20°C.
A coil of wire is connected to an ideal7.00V battery att= 0. Att=10.0ms, the current in the coil is204mA. Find the resistance and inductance of the coil
A small block of mass 1.21 kg slides without friction on a horizontal table. Initially it moves in a circle of radius R0 = 0.62 m with a speed 1.8 m/s. What is the torque placed on the mass by the string
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