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Question: A 60 year old person has a threshold of hearing of 75.0 dB for a sound with frequency f = 10,000 Hz. By what factor must the intensity of a sound wave of that frequency, audible to a typical young adult, (sound level= 43.0 dB) be increased so that it is heard by the older person.
question1a movable piston having a mass of 12 kg and a cross-sectional area of 7 cm2 traps 0.25 mol of an ideal gas in
An oak barrel with a lid of area 0.20 m2 is filled with water.A long, thin tube of cross-sectional area 5.0 X 10-5 m2 is insertedinto a hole at the center of the lid, What was the weight of the water in the tube
Fresh water flows through a horizontal tube of diameter 2.65 cmthat is joined to a second horizontal tube of diameter 1.58 cm. What isthe speed of flow in the first tube
In the "before" part of the figure below, car A (mass 1000 kg) is stopped at a traffic light when it is rear-ended by car B (mass 1600 kg). Both cars then slide with locked wheels until the frictional force from the slick road (with a low µk of 0...
As seen from above, a playground carousel is rotating counterclockwise about its center on frictionless bearings. Find the final angular speed of the carousel after the person climbs aboard
A 0.250 kg ball attached to a string s being swung in a vertical circle, What is the minimum speed at the top of the circle to keep the string from going slack
A block with mass m = 17.0 kg rests on a frictionless table and is accelerated by a spring with spring constant k = 4304.0 N/m after being compressed a distance x1 = 0.576 m from the spring’s unstretched length. The floor is frictionless except fo..
A step-down transformer is used to drop an alternating voltage from 10,000 to 500 V. What must be the ratio of secondary turns to primary turns? If the input current is 1.00 A and the transformer is 100% efficient, what is the output current?
A circular disk with the rectangular hole has a radius of 0.540 m and mass of 0.440 kg. It is suspended by a point on its perimeter. The moment of inertia about this point is I_p = 1.7×10-1 kgm2.
Two very small spheres are initially neutral and separated by a distance of 0.60 m. What is the magnitude of the electrostatic force that acts on each sphere
The coefficient of kinetic friction is 0.350. Illustrate what should be the magnitude of P, so that the net work done by it and the kinetic frictional force is zero?
A listener is standing in front of two speakers that are producing sound of the same frequency and amplitude, except that they are vibrating out of phase, find the frequency of the sound coming from the speakers
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