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The mass of hot-air balloon and its occupants is 320 kg (excluding the hot air inside the balloon). The air outside the balloon has a pressure of 1.01?105 Pa and a density of 1.29 kg/m3. To lift off, the air inside the balloon is heated. The volume of the heated balloon is 650 m3. The pressure of the heated air remains the same as that of the outside air. To what temperature (in K) must the air be heated so that the balloon just lift off? The molecular mass of the air is 29 u.
The angular momentum of a flywheel having a rotational inertia of 0.200 kg m2 about its central axis decreases from 5.00 to 1.20 kg m2/s in 2.20 s. What is the average power of the flywheel
A small piece of Styrofoam packing material is dropped from a height of 1.50 m above the ground. Until it reaches terminal speed, magnitude of its acceleration is given by a = g - bv. After falling 0.40 m, the styrofoam effectively reaches its ter..
A 0.200-kg block along a horizontal track has a speed of 1.80m/s at once before colliding with a light spring of force constant 44.2 N/m located at the end of the track.
How do you figure out a carnot engine cycle problem having temperature range from 4000k to 400k, pressure range from 1atm to 1000atm, max volume = 500 liters.and 20.31 moles of working fluid(monatomic gas). Please show steps.
A hockey player uses her hockey stick to exert a force of 6.81 N on a stationary hockey puck. What is the acceleration of the hockey puck
You've always wondered about the acceleration of the elevators in the 101 story high Empire State Building. What is the magnitude of the acceleration as the elevator starts upward
The secondary coil of a step-up transformer provides the voltage that operates an electrostatic air filter. Find the power consumed by the air filter.
A block weighing 15.0 N is attached to the lower end of a vertical spring (k = 122.0 N/m), What is the maximum kinetic energy of the block as it oscillates
How far away is the Milky Way from our nearest neighbour, Andromeda Galaxy, if Andromeda contains roughly the similar number of stars and attracts the Milky Way with a gravitational force of 2.4 x 10^30 N.
A person with mass m1 = 60 kg stands at the left end of a uniform beam with mass m2 = 91 kg and a length L = 3.2 m, What is the location of the center of mass of the system
A basketball is released from a height of 2.00 m above the floor and enters a basket that is 3.0 m above the floor. How far was the shooter from the basket
The mean diameters of X and Y, two planets in the same solar system, are 6.4 103 km and 1.2 104 km, respectively. The mass of X is 0.25 times the mass of Y. The value of g on Y is 8.8 m/s2.
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