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Air is contained in a vertical piston-cylinder assembly by a piston of mass 50 kg and having a face area of 0.01 m2. The mass of the air is 5 g, and initially the air occupies a volume of 5 L. The atmosphere exerts a pressure of 100 kPa on the top of the piston. The volume of the air slowly decreases to 0.002 m3 in a quasi-equilibrium process as the specific internal energy of the air decreases by 260 kJ/kg. Neglecting friction between the piston and the cylinder wall, determine the heat transfer to the air in kJ.
How many nitrogen molecules must strike a 1 cm2 surface each second to exert a pressure of 1 atm (Assume that the molecules are all moving at the same speed, at a temperature of 300K, and 45 degree angle to the wall).
A 113 gram apple falls from a branch that is 2.5 meters above the ground. Just before the impact, what is the speed of the apple
A 53.5 kg pole vaulter running at 11.4 m/s vaults over the bar. Her speed when she is over the bar is 1.14 m/s. determine her altitude as she crosses the bar
An airplane with a speed of 93.3 m/s is climbing upward at an angle of 58.5 ° with respect to the horizontal. Relative to the ground, determine the angle of the velocity vector of the package just before impact
An air-hockey puck floats across the table and bumps into a second puck, initially at rest. The first puck (mass 0.0250 kg) is moving initially due East at 5.50 m/s. Find the speeds of both picks after the bump
A slingshot fires a pebble that is in the air for 5.30seconds. It lands 73.0m away from where it was initially shot. Determine the initial horizontal and vertical components of the velocity
Find an angular velocity of the tire at the marker. Find also the linear speed of the point of contact of the tire with the pavement at the marker.
A positive charge q1 = 2.50 µC on a frictionless horizontal surface is attached to a spring of force constant k, the distance between charges to d = 9.00 cm, Find the value of k
Planet Z is 7000km in diameter. The free-fall acceleration on Planet Z is 10.0m/s2, What is the free-fall acceleration
an electron moving parallel to thenbspxnbspaxis has an initial speed ofnbsp5.10nbspnbsp106nbspms at the origin. its
An 8-g bullet is fired into a 170 g block that is initially at rest at the edge of a table of 1m height. The bullet remains in the block, and after the impact the block lands d = 2.10 m from the bottom of the table. Determine out the initial speed..
an elementary particle of mass m completely absorbs a photon after which its mass is 1.01m.a what was the energy of the
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