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Sound exits a diffraction horn loudspeaker through a rectangular opening like a small doorway. A person is sitting at an angle θ off to the side of a diffraction horn that has a widthD of 0.0781 m. The speed of sound is 343 m/s. This individual does not hear a sound wave that has a frequency of 11600Hz. When she is sitting at an angle θ/2, there is a different frequency that she does not hear. What is it?
In the rectangle in the drawing, a charge is to be placed at the empty corner to make the net force on the charge at corner A point along the vertical direction
The nucleus of 8Be, which consists of 4 protons and 4 neutrons, is very unstable and spontaneous breaks into two alpha particles, what is the force between the two alpha particles when they are 7.00 x 10^-15 m apart
The terminals of a 12-V battery are connected to parallel plates. What plate separation would produce an electric field between the plates of 1400 N/C
Three identical conducting spheres initially have following charges: sphere A, 5Q; sphere B, -7Q; and sphere C, 0. Spheres A and B is fixed in place, with a center-to-center separation that is much larger than the spheres.
A block of mass 50 kg is free to slide on a horizontal frictionless surface. A constant force F acting 20° above the horizontal is applied to the block. What is the magnitude of the applied force F
A particle (m = 3.9 x 10 ^-28kg) starting from rest, What is its de Broglie wavelength at the end of this period
NASA's Cassini mission to Saturn released a probe on December 25, 2004, that landed on the Saturnian moon Titan on January 14, How many revolutions had Huygens completed when it was 130 yards from the mother ship
After collision, the component of the total momentum parallel to the floor must remain zero, since the net external force acting on the plate has no component parallel to floor.find out the masses of pieces 1 and 2.
an old lady carries a 4kg potted plant to the top of a 100m tall building. what is the kinetic energy of the plant when it hits the ground
Two teams of nine members each engage in a tug of war. The first team's members have average masses of 70 kg and exert average forces of 1350 N horizontally, What is the acceleration of the two teams
A solid, horizontal cylinder of mass 7.1 kg and radius 0.57 m rotates with an angular speed of 5.84 rad/s about a fixed vertical axis through its center. What is the final angular speed of the system
An express subway train passes through an underground station. It enters at t = 0 with an initial velocity of 21.5 m/s, What is the velocity of the end of the train as it leaves
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