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A spherical balloon has a radius of 12.0m, and is filled with helium. How large a cargo can it lift,assuming that the skin and structure of the balloon have a mass of1200 kg? Neglect the bouyant force onthe cargo volume itself.
paid $20 an hour. working for 7 days straight , 14 hours every day 7am to 9pm. How much are you going to be paid
When 1g of natural gas is burned in a stove, about 56kJ ofheat is produced. How much mass is lost in the process? Can this mass change be directly measured
Two balloons (m = 0.028 kg) are separated by a distance of d = 0.9 m. They are released from rest and observed to have an acceleration of a = 1.9 m/s2 toward each other, How many electrons are respnsible for the charge
Two sheets of polarizing material are placed with their transmission axes at right angle to one another. What is the intensity of the transmitted light when the middle sheet is removed
A 61 kg speed skater with the velocity of 16 m/s comes into a curve of 18 m radius. How much friction should be exerted between skates and ice to negotiate the curve.
Consider an H-like atom in the quantum mechanical description. How many electrons fit into the n=4 shell of this atom, assuming the states coincide with that of the H-atom?
To stretch a spring 2.00 cm from its unstretched length, 15.0 J of work must be done, What is the force constant of this spring
A cannon ball is fired at a wall located 450 meters away. The initial horizontal component of the balls velocity is 90 m/s and it's initial angle is 24 degrees. How long does it take for the ball to reach the wall
A 10-turn circular coil of wire has a di- ameter of 0.45 m. What is the strength of the average emf generated in the coil
A thin film of water sits on top of a flat piece of glass, and light is incident from below, what is the angle of refraction of the final outgoing ray
f the U.S. demand for electricity continues to grow at about 2% per year, how many more MWe would be needed to meet that demand in 10 years, What fraction of our present use of natural gas is this
An especially violent lightning bolt has an average current of 2.25x 103 A lasting 0.271 s. How much charge is delivered to the ground by the lightning bolt?
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