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If a woman needs an amplification of 1.5 x 104 times the threshold intensity to enable her to hear at all frequencies, find what is her overall hearing loss in dB? Note that smaller amplification is appropriate for more intense sounds to avoid further damage to her hearing from levels above 90 dB.
A 55 kilogram swimmer is standing on a stationary 240 kilogram floating raft. Determine the recoil velocity that the raft would have if there were no friction and resistance due to the water
Larry tosses a volleyball to his wife, Lise, who catches it at the same height from which it was tossed. what was the initial horizontal velocity
What force is exerted by the water on the window of an underwater vehicle at this depth if the window is circular and has a diameter of 37.9 cm
Three silver wires of equal length are connected in series with a1.50 V battery. Their cross-sectional areas are 1.00, 5.00 and10.0 cm2. (a) What is the potential difference across the narrowest wire? (b) The medium wire? (c) The widest wire?
A 725 Newton man stands in the middle of a frozen pond of radius 9.0 meter. Determine how long does it take him to reach the south shore
A factory worker pushes a 28.7 crate a distance of 4.9 along a level floor at constant velocity by pushing downward at an angle of 29 below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.26 What magnitude of forc..
Despite the (incorrect) interpretation that a tunneling particlehas a negative kinetic energy, it turns out that a measurement of anegative kinetic energy is inconsistent with the postulates ofquantum mechanics. Prove it using the "probability postul..
A person carries a long pole of mass 20 kg and length 3.4 m at the angle of 60 degrees. Find the magnitude of the torque on the pole due to gravity.
The engine of a model rocket accelerates the rocket vertically upward for 2.0 s as follows: At t = 0, the rocket's speed is zero; at t = 1.0 s, determine the instantaneous acceleration of the rocket at t = 1.5 s
A heavy ball and a light ball are dropped in the absence of air resistance. The lighter ball will experience a greater acceleration. The two balls will experience the same acceleration. The heavier ball will experience a greater acceleration.
A rubber ball is able to bounce 0.90 times the height from which it is dropped. WHat is the ball's resultant displacement from it's initial hieght to it's maximum height after one bounce
A baseball player hits a baseball at one meter above the ground and gives it a velocity of 36 m/s at 41 degrees above horizontal. What will be the maximum height above the ground of the ball as it goes toward the fence
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