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(a) What is the minimum cross-sectional area required of a vertical steel cable from which is suspended a 270 kg chandelier? Assume a safety factor of 7.0. Utensile strenth of steel is 5.0 x 10^8.
(b) If the cable is 7.5 m long how much does it elongate?
Two protons, each having a speed of 0.970c in the laboratory, are moving toward each other. Determine the momentum of each proton in the laboratory
He pushes just hard enough to get the desk moving and continues pushing with that force for 5.00 s. Explain how much work does he do on the desk?
a beam of light enters a piece of zircon at an angle of incidence of 30 degrees. what is the angle of refraction in the zircon
What is the total momentum of system after the collision.
A generator produces 29 kilovolts (24,000 volts divided by 1000 = 24 kilovolts) of AC and a transformer steps this voltage up to 368 kilovolts for transmission over power lines
A sailboat is travelling east at 4.0 m/s. A sudden gust of wind gives the boat an acceleration a = (1.35 m/s2 30° north of east). What is the boat's speed 6.0 seconds later while the gust subsides.
The man completely inhales and jumps into the deep end of a pool with a depth of 9 feet. Calculate the net acceleration of the man with his breath completely inhaled while totally submerged in the water
Two identical particles of mass m approach each other at equal and opposite speeds, v. How much kinetic energy was lost in this collision
An unknown resistor is connected between the terminals of a 5.5 V battery. At what rate is energy now dissipated
Suppose it was launched form a launch pad in a space vacuum. Would it work? Illustrate what changes would we observe? Explain
In Millikan's experiment, an oil drop of radius 1.85 μm and density 0.852 g/cm3 is suspended in chamber C whilst a downward electric field of 0.62 × 10^5 N/C is applied. Find the charge on the drop, in terms of e.
A refinery buys gas that is metered at 52 degrees F and 250 psig. The refinery pays for the gas in a price per SCF. How many SCF were purchased
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