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Q. A certain loudspeaker has a diameter of 45 cm. At what frequency will the wavelength of the sound it emits in air be equal to its diameter?
Q. A small block with a mass of 0.190 kg is attached to a cord passing through a hole in a frictionless, horizontal surface. The block is originally revolving at a distance of 0.50 m from the hole with a speed of 0.90 m/s. The cord is then pulled from below, shortening the radius of the circle in which the block revolves to 0.15 m. At this new distance, the speed of the block is observed to be 3.00 m/s.
What is the tension in the cord in the original situation when the block has speed v_0 = 0.90 m/s?
What is the tension in the cord in the final situation when the block has speed v_1 = 3.00 m/s?
How much work was done by the person who pulled on the cord?
A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.
A resistor is in the shape of a cube, with each side of resistance R . Find the equivalent resistance between any two of its adjacent corners.
Question: Field and force with three charges? What is the electric field at the location of Q1, due to Q 2 ?
What is the maximum displacement of the bridge deck?
What is the magnitude of the current in the wire as a function of time?
Questions on blackbody, Infra-Red Detectors & Optic Lens and Digital Image.
Illustrate the cause of the components accelerating from rest down the conveyor.
Calculate the dc voltage applied to the circuit.
Quadrupole moments in the shell model
Determine the tension in each string
Calculate the smallest coefficient of static friction necessary for mass A to remain stationary.
Evaluate maximum altitude?
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