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A steel wire in a piano has a length of 0.8000 m and a mass of 3.900 10-3 kg. To what tension must this wire be stretched so that the fundamental vibration corresponds to middle C (fC = 261.6 Hz on the chromatic musical scale)?
Steam at 100°C is added to ice at 0°C, Find the amount of ice melted and the final temperature when the mass of steam is 14.0 g and the mass of ice is 52.0 g
You lay a mirror flat on the floor with one edge against a wall and aim a laser at the mirror. Find the angle of incidence of the laser ray on the mirror
A point charge with charge q1 = 2.00?C is held stationary at the origin, How much work W is done by the electric force on the moving point charge
Two long, parallel conductors carry currents I1 = 3.10 A and I2 = 5.10 A, both directed into the plane of the computer screen. Find out the magnitude and direction of the resultant magnetic field at a point midway between the wires. (b) Find out the ..
A 23- bullet traveling 220 penetrates a 2.6block of wood and emerges cleanly at 155. how fast does it move after the bullet emerges
A block of rock has dimensions of 2m x 2m x 2m and a density of 3000kg/m^3. The weight of the rock produces a normal stress on its bottom side. Calculate the magnitude of the normal stress on this side.
A certain airplane has a speed of 250.0 km/h and is diving at an angle of 30.0° below the horizontal when the pilot releases a radar decoy. The horizontal distance between the release point and the point where the decoy strikes the ground is 700 m..
A billiard ball moving at 5.30 m/s strikes a stationary ball of the same mass. Find the velocity (magnitude and direction) of the second ball after collision
In an experiment in physics class, a model solid-fueled rocket is fired vertically with an acceleration of 3 m/sec2 for 6 seconds. After that time, What is the maximum altitude the rocket reaches
An electric car accelerates for 8.0 s by drawing energy from its 305-V battery pack. Find the minimum horsepower rating of the car
The prong of a tuning fork moves back and forth when it is set into vibration. what are the maximum velocity and the maximum acceleration of the prong
An eastbound subway train accelerates from rest at 1.22 m/s2 along a straight track. How far apart are the trains when the eastbound subway train is traveling at the same speed as the westbound train
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