Question

A string that is 2.0 meters long is fixed at both ends and tightened until the wave speed is 18 m/s. What is the frequency of the standing wave shown in the figure? 27 Hz 110 Hz 54 Hz 81 Hz A 13,000-N vehicle is to be lifted by a 25-cm diameter hydraulic piston. What force needs to be applied to a 5.0 cm diameter piston to accomplish this? Assume the pistons each have negligible weight. 5200 N 2600 N 260 N 520 N A solid object floats in water with three-fourths of its volume beneath the surface. What is the object's density? The density of water is 1000 kg/m^3. 750 kg/m^3 250 kg/m^3 1000 kg/m^3 1333 kg/m^3 In a section of horizontal pipe with a diameter of 3.0 cm, the pressure is 100 kPa and water is flowing with a speed of 1.5 m/s. The pipe narrows to 2.0 cm. What is the pressure in the narrower region? Treat the water as an ideal incompressible fluid. 230 kPa 67 kPa 48 kPa 95 kPa 44 kPa Glycerin, with a viscosity of 1.5 N middot s/m^2, is flowing with an average speed of 1.2 m/s through a tube that has a radius of 5.0 mm and is 25 cm long. What is the drop in pressure over the length of this pipe? 140 kPa 76 kPa 130 kPa 72 kPa 46 kPa How much mass should be attached to a vertical ideal spring having a spring constant (force constant) of 39.5 N/m so that it will oscillate at 1.00 Hz? 2.00 kg 39.5 kg 1.56 kg 6.29 kg 1.00 kg A container if filled to a depth of 20.0 cm with water. On top of the water floats a 30.0 cm thick layer of oil with a specific gravity 0.700. What is the absolute pressure at the bottom of the container? Atmospheric pressure = 1.01 times 10 5 Pa A "snapshot" of a wave is given below. The frequency of oscillations is 160 Hz What is the amplitude of the wave? What is the wavelength of the wave? What is the wave speed? What is the wave period?
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Answer 1