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The human ear can detect a minimum intensity of lo = 10^-12 W/m^2. A student hears a sound with an intensity of l = 16*10^-6 W/m^2. If the student hears a sound a 10 dB, what is the intensity of the sound?
A 6-µF capacitor in series with a 2-? resistor is charged with a 9-V battery for a long time by closing the switch, Determine the maximum current through the inductor
A large man sits on a four-legged chair with his feet off the floor. The combined mass of the man and chair is 95.0 kg. what pressure does each leg exert on the floor
The hammer throw is a track-and-field event in which a 7.30-kg ball (the hammer) is whirled around in a circle several times and released. It then moves upward on the familiar curved path of projectile motion and eventually returns to the ground s..
What magnitude point charge creates a 14000 N/C electric field at a distance of 0.230 m, How large is the field at 20.0 m
a medium carbon annealed steel rod has a rectangle cross section and must cope with tension of 3 tonnes. the thickness
Consider a rocket which has two combustion rates, ?1 = 4 kg/s and ?2 = 8 kg/s. The relative speed of the exhaust gas is 90 m/s in either case. Determine the final speed of the rocket
You are on a mysterious planet and notice that a 2.9 m long simple pendulum has a period of 2.6 s. Determine the planet's acceleration due to gravity
A series combination of a 8 kΩ resistor and an unknown capacitor is connected to a 13 V battery. Determine the capacitance of the capacitor
Compute the magnitude of the average acceleration
A superball and a clay ball are droped from a height of 10 cm above a table top. They have the same mass 0.05 kg and the same size. The superball bounces off the table and rises back to the same height. The clay ball sticks to the table. For the clay..
A bungee jumper with mass 63 jumps from a high bridge. After reaching his lowest point, he oscillates up and down, hitting a low point eight more times in 47. He finally comes to rest 21.00 below the level of the bridge.
A 1500kg car moving at 40Km/hr is brought to a sudden stop. If all the car's kinetic energy is dissipated in heating its four 5.0kg steel brake disks, by how much do the disk temperatures increase? The specific heat of steel is c=0.120cal/gdegree Cel..
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