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The area of a typical eardrum is about 5.0x10?5 m2.
a)What is the sound power (energy per second) incident on the eardrum at the threshold of hearing?
b)What is the sound power (energy per second) incident on the eardrum at the threshold for pain?
A hotel elevator ascends 160m with a maximum speed of 4.20 m/s. Its acceleration and deceleration both have a magnitude of 1.0 m/s2. How long does it take to make the complete trip from bottom to top.
Two packages at UPS start sliding down the 40 degree ramp. Determine how long does it take package A to reach the bottom
A positive charge +q1 is located to the left of a negative charge -q2. On aline passint through the two charges, theer are two places where the total potential is zero. The first place is between the charges and is 5cm to the left of the negativ..
Two small spheres spaced 20.0 cm apart have equal charge. How many excess electrons must be present on each sphere
While sitting in your car by the side of a country road, you see your friend, who happens to have an identical car with an identical horn, approaching you. How fast is your friend approaching you
A two slit interference experiment is carried out carefully with sodium light (λ = 589nm). Fringes are measured carefully on a screen 100 cm away from the double slit, and the center of the twentieth fringe is found to be 11.78 mm from the center ..
A square wooden raft sinks halfway into the water unloaded and sinks all the way into the water without sinking when carrying a load of 200 kg. Discover the mass of the raft?
The wavelength of one particular emission of a certain galaxy has been shifted from 565 to 699 nm due to the Doppler effect. What is the radial speed of the galaxy relative to Earth?
Two solid spheres, each of mass m, are rolling without slipping with a speed v. If the spheres have radii R1 and R2 with R1/R2 = 5.5, what is the ratio of their kinetic energies
Suppose you throw a 0.058-kg ball with a speed of 10.9 m/s and at an angle of 30.9° above the horizontal from a building 10.8 m high. What will be its speed when it hits the ground
A uniform thin rod of length L=2.5 m and mass 2 kg can rotate in a horizontal plane about a vertical axis through its center. The rod is at rest when a 0.3 kg ball of putty, moving in the horizontal plane of the rod, hits and sticks to one end.
imagine a very heavy cube of pure gold that is 1.40 m on a side. approximate the atoms in this cube as little cubes.
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