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A helium baloon is used to lift something which weighs 100N. The layer of the baloon weighs 50N, and the volume of the baloon when it is fully blown up is 32 cubic meters. The temperature of the air surrounding it is 0 degrees celsius. The baloon is filled with so much helium that the net force exacted on it as well as the weight it is lifting is 30N. How many mol helium is there in the gas? At what height, will the baloon be fully blown up? Will the baloon ever reach the height when it is fully blown up? If yes, what is the height? Please give me a detailed explanation as to how you obtain your answer.
A copper bar 2.5 m long has a circular cross section of radius 2 cm. One end is kept at 80oC, what is the temperature gradient along the length of the bar
At target prctice, Scott holds his bow and pulls the arrowback a distance of 0.30m by exerting an average force of 40.00N what is the potential energy stored in the bow
How much work is done by the Moon's gravitational field as a 900 kg meteor comes in from outer space and impacts on the Moon's surface
Jane, looking for Tarzan, is running at top speed (5.2m/s ) and grabs a vine hanging vertically from a tall tree in the jungle. How high can she swing upward
A 3 kg box is pushed across a frictionless horizontal floor with a force F = 20 N that makes an angle of 25° with the horizontal. The box moves 18 m.
A hare and a tortoise compete in a race over a straight course 2.25 km long. The tortoise crawls at a speed of 0.180 m/s toward the finish line. For how long in time was the hare stationary
At launch, the Space Shuttle weighs 4.5 million pounds (2.04 million kilograms). As the vehicle starts from rest on the launch pad, what force must this seat exert on him during liftoff
Sunlight is observed to focus at a point 18.5 cm behind alens. What is its power in diopters
What is the maximum number of 6.00 ?F capacitors that can be connected in parallel with a 6.00 V battery while keeping the total charge stored within the capacitor array below 484 ?C? If the same number of 6.00 ?F capacitors are connected in series w..
A high-speed sander has a disk 4.00 cm in radius that rotates about its axis at aconstant rate of 1265 rev/min. find the angular speed of the disk in radians per second
Their motions have equal periods, but the radius of skater A's circle is half that of skater B's circle. Evaluate the ratio of the magnitudes of the forces acting on each skater?
A disk of radius 3.00 cm has a uniformly distributed charge of Q = 5.20 uC, Calculate the electric field on the perpendicular axis of disk
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