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A spherical balloon has a radius of 7.92 meter, and is filled with helium. Calculate how large a cargo can it lift, assuming that the skin and structure of the balloon have a mass of 862 kilogram? Ignore the buoyant force on the cargo volume itself.
When a single person shouts at a football game, the loudness of sound at the center of the field is 55 dB. Than all the people shout together, the loudness increases to 106 dB. Suppose that each person is about the similar distance from the center of..
A car with a mass of 2400 kg is traveling at a speed of 40.0 km/h on an icy road when it collides with a 10000 kg truck which was traveling toward the car with the speed of 18 km/h. Find the change in the kinetic energy of the system
A portion of audio equipment is said to have a signal-to-noise ratio of 58 dB. Determine the ratio of intensities of the signal and the background noise
An object is placed 15.0 centimeter in front of a convex mirror, the image being 7.20 centimeter behind the mirror. Determine how far in front of the mirror is the second object located
An airplane is cruising at an altitude of 10 km. The pressure outside the craft is 0.311 atm; within the passenger compartment, the pressure is 1.01 atm and the temperature is 20°C. A small leak occurs in one of the window seals in the passenger c..
For a single, isolated point charge carrying a charge of q = 46.7 pC, one equipotential surface consists of a sphere of radius 22.4 mm centered on the point charge as shown. What is the potential on this surface?
A gas consists of 5.05 grams of oxygen and 5.05 grams of nitrogen and occupies a volume of 1.22 liter at a temperature of 370 K. Find the partial pressure of the oxygen
A hill that has a 15.8 % grade is one that rises 15.8 m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal
A thin, uniform, metal bar, 3m long and weighing 85 N, is hanging vertically from the ceiling by a frictionless pivot. Find the angular speed of the bar just after the collision
a hotel elevator ascends 200 m with a maximum speed of 5.2 ms. its acceleration and deceleration both have a magnitude
A block of mass 1.90 kg is pushed 4.60 m along a frictionless horizontal table by a constant 16.0 N force directed 27.0° below the horizontal.
A man pushes a lawn mower on a level lawn with a force of 215N. If 31% of this force is directed downward, and 50W of power is expanded in pushing the mower 5.8 m, how much time is spent in pushing the mower this distance?
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