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1. A uniform beam 16.0 feet long and weighing 300 pounds is placed such that it protrudes 4.0 feet over the edge of a flat roof. How far out from the edge of the roof can a 150-pound man walk on the beam without tipping the beam?
2. A uniform ladder 10.0 feet long and weighing 30 pounds is placed against a perfectly smooth wall, its lower end being 6.0 feet from the wall. What is the least coefficient of static friction between the lower end of the ladder and the floor that will permit a 160-pound man to.
A coin is located 18.0 cm to the left of aconverging lens (f = 16.0 cm). Find the separation between the lenses
a total of 8.77middot106 electrons are placed on an initially uncharged wire of length 1.87 m. what is the magnitude of
A series RLC circuit has R = 75 %u03A9, L= 20 mH, and a resonance frequency of 4.0 kHz. What is the impedance of the circuit at resonance
One of the most efficient engines built so far has the following characteristics: combustion chamber temperature = 1900°C, What is the actual efficiency of this engine
If the partial pressure of water vapor is 47 mm Hg in the lungs at 760 mm Hg pressure, what percentage of air does the water vapor constitue
The sun exerts a gravitational force 5.56 x 1022 N on Venus. Assuming the Venus orbit is circular with radius 1.08 x 1011, Determine orbital period check your answer against the observed period, about 225 days
An electric oscillator is made with a 2.8 micro F capacitor and a 7.2 mH inductor. The capacitor is initially charged up with a 6.0 V battery. What is the frequency at which it oscillates
In a Newton's ring experiment, a plano- convex glass (n = 1.42) lens having diame- ter 11.8 cm is placed on a flat plate, What is the radius of curvature of the convex surface of the lens
A wire carrying a current of 8.00 A is to be formed into a circular loop of one turn. If the required value of the magnetic field at the center of the loop is 10.0 µT, what is the required radius?
A system absorbs at a 45% efficiency in a location where average solar-energy hitting the solar pan- els is 210 W/m2. what volume of water can be heated in one hour
A doubly charged ion (charge 2e) with velocity 6.9 × 106 m/s moves in a circular path of diameter 60.0 cm in a magnetic field of 0.80 T in a mass spectrometer
The amount of charge that passes through a filament of a certain lightbulb in 1.90 s is 1.54 C. What is the average power
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