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The speed of sound in air at room temperature is 340 m/s.
(a) What is the frequency of a sound wave in air with wavelength 1.3 m? answer in Hz
(b) What is the frequency of a radio wave with the same wavelength? (Radio waves are electromagnetic waves that travel at 3.00 108 m/s in air or in vacuum.) answer in Hz
What is the magnitude of an object's average velocity if an object moves from a point with coordinates x = 2.54 m, y = -3.56 m to a point with coordinates x = 7.85 m, y = -6.54 m in a time interval of 2.02 s.
A chair of weight 74.0 N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 47.0 N directed at an angle of 41.0^circ below the horizontal and the chair slides along floor.
A sphere of radius R = 0.325 m and uniform charge density -151 nC/m3 lies at the center of a spherical, find the magnitude of the electric field at the following radial distances from the center of the charge distribution
Suppose a heat engine takes in 420 J of energy from a hot reservoir and performs 30 J of work in each cycle.
A 75-kg person sits on a 3.7-kg chair. Each leg of the chair makes contact with the floor in a circle that is 1.5 cm in diameter. Find out the pressure exerted on the floor by each leg of the chair; assume the weight is evenly distributed.
A power plant burns coal and generates an average of 600.0 MW of electrical power, Find the total electrical energy generated by the plant in a 30-day period
Two large, non-conducting plates with the indicated area charge densities are suspended 3.67 cm apart, What volume of the air in region B (between the plates) stores an equal amount of energy
Find out the intensity if the frequency is increased to 2.90 kHz while constant displacement amplitude is maintained.
A 2.90 m long, 320 kg steel beam extends horizontally from the point where it has been bolted to the framework of the new building under construction. A 66 kg construction worker stands at the far end of the beam.
Gold is the most ductile of all metals. For example, one gram of gold can be drawn into a wire 2.25 km long. What is the resistance of such a wire at 20°C
An airplane is flying with a velocity of 97.0 at an angle of 25.0 above the horizontal. while the plane is a distance 103 directly above a dog that is standing on level ground, a suitcase drops out of the luggage compartment. How far from the dog ..
A 460-Hz tuning fork causes resonance in the tube depicted in the figure below when the length L of the air column above the water is 18.3 and 55.8 cm, Find the speed of sound in air
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