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On a sunny morning in a ?eld, the atmospheric pressure is 10N/m and the temperature is 279 K. The ?lm crew has ?lled a balloon with 1000m3 of preheated air at atmospheric pressure and a temperature of 300 K. The mass of the empty balloon and its load is 240 Kg. Under these conditions, the balloon rises above its burden, but the airship remains grounded. To begin the ascent, the air within the balloon is brought to a higher temperature. It expands but remains at the pressure of 105 N/m2 . No air enters or leaves the balloon. How much heat must be added to the air in the balloon to initiate the ?ight?
A centrifuge in a medical laboratory rotates at an angular speed of 3400 rev/min, Find the constant angular acceleration of the centrifuge
How would you describe why we have different atmospheric pressure on different level (height) of earth's atmosphere in molecular level (molecular behaviour and what causes such behaviour).
Ball 1, with a mass of 130g and traveling at 14m/s, collides head on with ball 2, What are the final velocities of each ball if the collision is perfectly elastic
A certain metal with atomic mass 2.6 × 10?25 kg has an interatomic bond with length 2.5 × 10?10 m and stiffness 45 N/m. What is the speed of sound in a rod made of this metal
Nitrogen and oxygen in their liquid states have densities only 0.80 and 0.90 that of water. Atmospheric pressure is due primarily to weight of nitrogen and oxygen gas in the air. If atmosphere liquefied would its depth be greater or less than 10.30 m..
q1. a 170 g block hangs from a spring with spring constant 9.0 nm. at t0 s the block is 24 cm below an equilibrium
A highway curve has a radius of 125 m. At what angle should the road be banked so that a car traveling at 27.4 m/s has no tendency to skid sideways on the road.Find an acceleration of box and ramp.
A gasoline engine absorbs 2,600 J of heat and performs 1,000 J of mechanical work in each cycle. Find the total of heat expelled in each cycle.
A 51.0-g Super Ball traveling at 27.0 m/s bounces off a brick wall and rebounds at 21.5 m/s. what is the magnitude of the average acceleration of the ball during this time interval
A mass is at rest on a spring in a liquid with density = 1500kg/m^3. The spring has a force constant of 200N/m, determine the density of the mass
Describe fusion. What role does a tokamak play in a fusion reactor? What are the advantages of nuclear power
A 1050 kg car carrying four 84 kg people travels over a rough "washboard" dirt road with corrugations 4m apart which causes the car to bounce on its spring suspension. The car bounces with maximum amplitude while its speed is 24km/h. The car now s..
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