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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?
An airplane pilot fell 355 m after jumping from an aircraft without his parachute opening. He landed in a snowbank, creating a crater 1.3 m deep, Estimate the work done by the snow in bringing him to rest
A straight, nonconducting plastic wire 8.50 cm long carries a charge density of +175 nC/m distributed uniformly along its length, Find the magnitude and direction of the electric field
a bicyclist of mass 54 kg puts all his weight on each downward-moving pedal as he pedals up a steep road. determine the magnitude of the maximum torque he exterts in the process
a plane locked on cruise control flying due east at 300ms but its resultant velocity is 300.66ms at 3.8 south of east.
After being accelerated through a potential difference of 5.42 kV, a singly charged carbon ion (12C) moves in a circle of radius 20.8 cm in the magnetic field of a mass spectrometer. What is the magnitude of the field
The isotope 226 Ra Alpha decays. its measured atomic mass is 226.02541 amu, the daughter nucleus has a mass of 222.01758 amu and helium has atomic mass 4.0026 amu. calculate the kinetic energy of the alpha particle
A tiny source is emitting electromagnetic radiation equally in all directions. What is the power with which the source emits radiation
A transformer has 330 primary turns and 1340 secondary turns. The input voltage is 120 V and the output current is 15.0 A. What are the output voltage and input current
A box slides down a rough, 25 Degree incline with a coefficient of kinetic friction between the box and incline of 0.7. What will be its speed at the bottom
Lasers are used extensively in eye surgery to remove unwanted "material" from the eye or reshape the eye's lens. What is the power during one of these pulses
A 50.g dart rests up against a spring that has been compressed 0.050 meters. If the dart were fired vertically, what height would it reach
A 130 horizontal beam is supported at each end. A 310 piano rests a quarter of the way from one end. What is the vertical force on each of the supports
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