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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.
A tank 2.30 meters in height is filled with water to a level of 2.10 meters. At the bottom of the tank a hose is attached. Find the velocity of the water coming out of the hose
Kenny pulls with a force of 850 N. Justin pushes with a force of 650 N. The crate weighs 1250 N and sits on a ramp that is 40 degrees from the horizontal. Tyler is pushing at an angle of 35 degrees with respect to the crate
A second baseman tosses the ball to the first baseman, who catches it at the same level from which it was thrown. What is the ball's direction of motion just before it is caught
The nucleus of an atom is on the order of 10-15 m in diameter. For an electron to be confined to a nucleus, What would be the kinetic energy of an electron confined to this region
Two gravitational forces act on a particle, in perpendicular directions. To find the net force, can we add the magnitudes of those two forces?
An applied force F1= 16N acting on an object with the mass m = 2 kg which is moving on the surface of a table. find the coefficient of friction between the object and the table
a laser with light of wavelength 500 nm shines through two parallel thin slits separated by 0.5 mm onto a screen and an
On a winter day heat leaks out of a house at the rate of 2.5e4 kcal/h. At what rate does this process produce entropy
Find out the rate of the wheel's rotation in revolutions per minute that will produce this effect.
Magnetic resonance imaging needs a magnetic field strength of 1.5 T. The solenoid is 1.8 m long and 75 cm in diameter. It is tightly wound with a single layer of 1.70-mm-diameter superconducting wire.
A small button placed on a horizontal rotating platform with diameter 0.326m will revolve with the platform when it is brought up to a rotational speed of 43.0rev/min, How far from the axis can the button be placed, without slipping,
In a X-ray tube, electrons are accelerated through a potential of 10, 000V. How much energy does the accelerated electron have
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