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An 9 hour exposure to a sound level of 90 dB may cause hearing damage. Find what energy in joules falls on a 0.450 centimeter diameter eardrum so exposed?
A 1724 gram mass is on a horizontal surface with µk = 0.400, and is in contact with a mass less spring with a force constant of 595 N/m which is compressed. Obtain the distance the spring was compressed
How many electrons would have to be placed on the sphere to produce an electric field of magnitude 1.41 105 N/C at a point 8.60 cm from the center of the sphere
A steel ball is dropped from a building's roof and passes a window, taking 0.13 s to fall from the top to the bottom of the window, a distance of 1.20 m. How tall is the building
a pipe discharges wine into a 1.5 m diameter tank. another pipe 15 cm diameter located near the base of the tank is
A proton is projected in the positive x direction into a region of uniform electric field = (-5.20E5) N/C at t = 0. The proton travels 6.20 cm as it comes to rest, Determine the initial speed of the proton
What did Newton discover about gravity? 1. All objects near the Earth free fall with the same acceleration. 2. Any force on a planet would be directed along its path. 3. Gravity only happens on Earth.
what characteristic of a fluid would greatly increases the physical and mathematical complexity of fluid mechanics?
There is evidence that elephants communicate via infrasound, Determine the intensity level of the infrasound 10 km from the source, assuming the sound energy radiates uniformly in all directions
A boxer receives a horizontal blow to the head that topples him over. How long would it take him to hit the floor if he continued with the same angular velocity
During practice, a soccer player kicks a ball, giving it a 32.5 m/s initial speed. It travels the maximum possible distance before landing down field. How far did the ball travel
A beam of 8.61 MeV protons is incident on a target of 2713Al. Those protons that collide produce the reaction shown below. determine the kinetic energy of the emerging neutrons
a hockey player hits a .1 kg puck initially at rest on the ice with a force of 160 n for a period of .024 s. what is
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