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A source of sound having a frequency of 330 Hz is moving at 25m/s. If the speed of sound in air is 340 m/s what is the frequency of sound heard by (a) someone in front of the moving source; (b)someone behind the moving source?
An object is placed directly between a large planet and a star. Find the distance from the planet for which the net gravitational force exerted by the planet
A thin, cylindrical rod L = 20.6 cm long with a mass m = 1.20 kg has a ball of diameter d = 6.00 cm and mass M = 2.00 kg attached to one end. The arrangement is originally vertical and stationary, with the ball at the top as shown in the figure be..
Two parallel, uniformly charged, infinitely long wires carry opposite charges with a linear charge density ? = 3.83 ?C/m and are 5.69 cm apart. What is the magnitude of the electric field at a point midway between them and 54.3 cm above the plane con..
A u-tube with a cross-sectional area of 1.00 cm^2 is open to the atmosphere at both ends. WAter is poured into the tube until the water rises part way along the straight sides, What is the density of the oil
Consider a map oriented so that the x axis runs east-west (with east being the "positive" direction), find the direction of the total movement of the driver
the electric motor of a heat pump transfers energy as heat from the outdoors which is at -6.1degc to a room which is at
A diffraction grating produces a first-order bright fringethat is 0.0824 m away from the centralbright fringe on a flat screen. evaluate the wavelength of the light shining on the grating
You are at the controls of a particle accelerator, sending beam of 3.90 x 10^7 m/s protons (mass m) at a gas target of an unknown element. Your detector tells you that some protons bounce straight back after a collision with one of the nuclei of t..
The parachute on a race car of weight 8130 N opens at the end of a quarter mile run when the car is traveling at 30.7 m/s. What total retarding force must be supplied by the parachute
What would happen to the gravitational force between Earth and the Sun. A reconnaissance plane flies 600 km away from its base at 240 km/h, then flies back to its base at 320km/h.
A ray of light makes an angle of 25 degrees with the normal to a plane mirror. through what angle is the reflected ray rotated
If it takes 3.60 x10-13 s for a nitrogen molecule to hit the wall and rebound with the same speed but moving in an opposite direction (assumed to be the negative direction), what is the average acceleration of the molecule for the period of this t..
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