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A string, 0.23 m long, vibrating in the n = 2 harmonic, excites an open pipe, 0.82 m long, into second overtone resonance. The speed of sound in air is 345 m/s. What is the number of antinodes in the standing wave pattern of the pipe?
The drawing shows a block at rest on an incline. What is the static frictional force that acts on the block
A 745 N window washer is standing on a scaffold supported by a vertical rope at each end. What is the tension in the rope on the left
Two charges are placed on the x axis. One of the charges (q1 = +6.95C) is at x1 = +3.00 cm and the other (q2 = -27.3C) is at x2 = +9.00 cm. Find out the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b..
Dan is gliding on his skateboard at 4.0m/s . He suddenly jumps backward off the skateboard, How fast is Dan going as his feet hit the ground
An ideal gas at STP, originally occupying a volume of 0.115 m^3, expands isothermally until its pressure falls to 0.85 atm. How much heat flows into the gas
an alpha particle charge 2e enters a uniform electric field e 5x104 vm m directed alongsay the y axis. the particle
A sledge loaded with bricks has a total mass of 19.0 kg and is pulled at constant speed by a rope. The rope is inclined at 20.0° above the horizontal, and the sledge moves a distance of 20.0 m on a horizontal surface. The coefficient of kinetic fr..
A 4.00 kg mass is connected to a spring with a spring constant of 9.00 N/m. find the maximum acceleration of the simple harmonic motion
A ball is thrown horizontally from the roof of a building 47.0m tall and lands 21.3m from the base. What was the ball's initial speed
Deriving the Hawking temperature T = (hbar)c^3/8(pi)kBGM rigorously from quantum field theory is beyond our scope. However, we can make its form plausible by the following considerations. Assume a particle– antiparticle pair having a rest mass m..
A light plane is headed due south with a velocity of 157 km/h relative to still air. After 1.00 hour, the pilot notices that they have covered only 121 km and their direction is not south but southeast (45.0^circ).
A uniform ladder 10.0 m long is leaning against a frictionless wall at an angle of 60.0° above the horizontal. find the magnitude of the frictional force exerted on the ladder
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