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A large tank is filled with methane gas at a concentration of 0.740 kg/m3. The valve of a 1.70-m pipe connecting the tank to the atmosphere is inadvertantly left open for 16.0 hours. During this time, 9.10x10-4kg 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 2.10x10-5m2/s. What is the cross-sectional area of the pipe? Assume that the concentration of methane in the atmosphere is zero.
Elizabeth is nearsighted. Without glasses, she can see objects clearly when they are between 15.0 cm and 90.0 cm away from her eyes. how close to her eye can an object be before it appears out of focus
What is the rate of heat flow through the door? By what factor is the heat flow increased if a window 0.550 m on a side is inserted in the door?
During hand-pumped rail car races, a speed of 27.2 km/h has been achieved by teams of four people. How long is the time of fall of the rail car
Water at a pressure of 3.2 atm at street level flows into an office building at a speed of 0.5 m/s through a pipe 5.6 cm in diameter. Calculate the water pressure in such a pipe on the top floor
A grating has 530 rulings/mm and is 5.4 mm wide. How many higher orders of maxima can be seen
in coming to a stop a car leaves skid marks 76 m long on the highway. assuming a deceleration of 6.50 ms2 estimate the
It can be shown that asin(theta) + bcos(theta), where ab is not = 0, is a circle. Find the center (in Cartesian Coordinates) and the radius of the circle in terms of a and b
The Velocity-time graph below shows the motion of a cyclist: Describe in words the motion of the cyclist? Calculate the acceleration of the cyclist from: (i) A to B (ii) B to C (iii) C to D
Charges of 4.0 uC and -6.0uC are placed at two corners of an equilateral triangle with sides of 0.10m. At the third corner, what is the electric field created by these two charges
the electric field just above the surface of the charged drum of a photocopying machine has a magnitude e of 2.3 x 105
A jet plane requires 1468 m to reach takeoff speed of 90.56 m/s from rest. Determine the acceleration of the jet plane and the time required to reach this speed.
A 7.42-g bullet is moving horizontally with a velocity of +362 m/s, where the sign + indicates that it is moving to the right, find the velocity of the second block after the bullet imbeds itself
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