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The area of a typical eardrum is about 5.0 × 10?5 m2.
(a) Calculate the sound power (the energy per second) incident on an eardrum at the threshold of hearing.
(Answer in W)
(b) Calculate the sound power incident on an eardrum at the threshold of pain.
A kid is outside his home playing with a metal hoop and stick. If the hoop starts from rest at the top of the hill and reaches a linear speed of 9.50 m/s in 11.5 s, what is the angular acceleration of the hoop
A person holds a rifle horizontally and fires at a target. The bullet has a muzzle speed of 200m/s, The air temp is 72 degrees Fahrenheit. What is the distance to the target
One particle has a mass of 4.41 x 10-3 kg and a charge of +6.92 ?C. A second particle has a mass of 6.52 x 10-3 kg and the same charge. The two particles are initially held in place and then released.
A race car starts from rest on the circular track of radius 455m. The car's speed increases at the constant rate of 0.480m/s2. At the point where magnitudes of the centripetal and tangential accelerations are equal.
You send a beam of light from a material with index of refraction 1.19 into an unkown material. In order to help identify this material, What is the index of refraction of the unknown material
An object is located to the left of a convex lens whose focal length = +40cm. The magnification produced by the lens = 3.0 m. Calculate the distance through which the object must be moved
A highway is to be built between two towns, one of which lies 30.0 km south and 83.0 km west of the other. What is the shortest length of highway that can be built between the two towns, and at what angle would this highway be directed?
A nuclear power plant generates(output) 500 MW. it is 34% efficient, How much does the water temperature rise
A meteoroid is speeding through the atmosphere, traveling east at 21.5 km/s while descending at 19.0 km/s. What is its speed, in km/s.
How do you establish the value of theta
An airplane flies 200 km due west from city A to city B and then 265 km in direction of 27.5° north of west from city B to city C.
A wire carries a current of 9.0 A in a direction that makes an angle of 35.0° with the direction of a magnetic field, Find the magnetic force on a 6.00 m length of the wire
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