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A 0.10-kg balloon is filled with helium(density = 0.179 kg/m3). If the balloon is a sphere witha radius of 6.3 m, what is the maximum weight it can lift?
Calculate the power spectrum of square pulse with amplitude, A and length, τ0. plot the power spectrum, shower several zero-crossings
Using the Rayleigh criterion, one concludes that using fixed wavelength light that it is not possible to resolve details less than about
A certain part of an aircraft engine has a volume of 1.2 ft3. Find the weight of the piece when it is made of copper
A golfer hits a shot to a green that is elevated 3 m above the point where the ball is struck, find the speed of the ball just before it lands
A rock is dropped off the side of a bridge and hits the water below 7.5 s later. What was the rock's velocity when it hit the water
Two ambulances move toward each other on a straight road. Each travels at a speed of 65 mph. The siren on each ambulance produces a sound wave of frequency 460 Hz. (Take the speed of sound in air to be 340 m/s.)
Old naval ships fired 14 kg cannon balls from a 250 kg cannon. It was very important to stop the recoil of the cannon, since otherwise heavy cannon would go careening across the deck of the ship. In one design, a large spring with spring constant 2..
A Goodyear blimp typically contains 6280 m3 of helium (He) at an absolute pressure of 1.10 x 105 Pa. What is the mass (in kg) of the helium in the blimp
consider an electron on the surface of a uniformly charged sphere of radius 1.0 cm and total charge 1.8 x 10-15 c. what
The period of the moon (the time for a complete revolution) is 27.32 days, Determine the angular velocity of the moon
How much sound power will strike the eardrum of an airport worker 15.3 m from the aircraft? (Use 1.9 10-2 m as the diameter of the ear.)
a periodic external force acts on a 6 kg mass suspended from the lower end of a vertical spring that has spring
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