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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.
Do you agree with using non standard units instead of standard units in instructional activities? Why or Why not
A swimming pool is circular with a 38-ft diameter. The depth is constant along east-west lines and increases linearly from 2 ft at the south end to 7 ft at the north end. Find the volume of water in the pool.
For each correlation coefficient below, calculate what proportion of variance is shared by the two correlated variables:
Write an algebraic expression to answer the question below.
Design A ramp makes an acute angle with respect to the horizontal. Any two points along either edge of the ramp that are 10 feet apart differ.
A polynomial f(x) of degree 3 whose coefficients are real numbers has the zeros -4 and 4 - 5i. Find the remaining zeros of f.
What are all the possible dimensions for boxes that will hold exactly 2oo one-inch cubes?
The description given above of the process in Figure for recovery of the transmitted message assures that the transmitter and receiver have access to a common.
If a second earthquake has 860 times as much energy (earth movement) as the first, find the magnitude of the second quake.
a. What is the probability that she reaches her goal of scoring at least 1350 points in any exam?
Ryan is trying to get serious about his long-term savings for retirement and has started an individual retirement account (IRA) with a principal lump sum of $500.
True or False: A worker earns $15 per hour at a plant and is told that only 2.5% of all workers make a higher wage. If the wage is assumed to be normally distributed and the standard deviation of wage rates is $5 per hour, the average wage for the..
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