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A large tank is filled with methane gas at a concentration of 0.770 kg/m3. The valve of a 1.40-m pipe connecting the tank to the atmosphere is inadvertantly left open for 13.0 hours. During this time, 9.90x10-4 kg of methane diffuses out of the tank, leaving the concentration of methane in the tank essentially unchanged. The diffusion constant for methane in air is 2.10x10-5 m2/s. What is the cross-sectional area of the pipe? Assume that the concentration of methane in the atmosphere is zero.
A toboggan approaches a snowy hill moving at 10.9 m/s. The coefficients of static and kinetic friction between the snow and the toboggan are 0.470 and 0.320, Find the acceleration of the toboggan as it is going up the hill
A long cylindrical wire of radius R carries a current I. Let the z axis be a long the axis of the wire. The current density of the wire is j=1/pir^2. Find the current within the cross section of the wire or radius r
When a ball is released from rest at a height of 5 ft above the floor, it bounces to a height of 3.5 feet. how high will it bounce
A flowerpot is accidently knocked off the edge of a balcony 50 m above the ground. Find the velocity and acceleration of the flowerpot at t=2.0s
It's generally okay to ignore relativistic effects when a particle's speed is less than 1.0% of the speed of light, Find the accelerating potential difference that will bring electrons to that speed, starting from rest
a spacecraft is traveling with a velocity of v0x 6150 ms along the x direction. two engines are turned on for a time
A small object is placed to the left of a convex lens and on its optical axis. The object is 30 cm from the lens, which has a focal length of 14 cm. If the object is moved to a position 17 cm to the left of the lens,
The maximum distance available in this (large!) camera between the lens and the film plane is 105mm. How far ahead of the film plane should the lens be, if the object to be photographed is 1.2m away?
A 2.3 kg box, starting from rest, is pushed up a ramp by a 10 N force parallel to the ramp. The ramp is 2.0 m long and tilted at 17 degrees. How much work does the force do on the system
A simple harmonic oscillator is constructed from a spring which is connected to a mass of 0.3 kg. What is the total energy of the oscillation
A car drives at constant speed of 15 m/s in 5.0 seconds, then it speeds up to 25 m/s in 6 seconds by constant acceleration, it holds that speed for 4 seconds and then the car stops with a constant acceleration at a 55 meter distance. Compute the aver..
A 0.50 kg mass is attached to a spring of spring constant 20 N/m along a horizontal, frictionless surface. Find the potential energy stored in the spring when the mass is at its maximum displacement
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