What is the variance of x
In Nancy's STAT 225 class, 75% of the students passed (got a C or better) on Exam 1. Suppose we randomly choose 10 students with replacement. Let X be the number of student(s) who passed. What is the variance of X?
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The equation for a van der Waals gas in (P + na^2/V^2)(V-nb)=nRT. 5 moles of the van der Waals gas nitrogen expands irreversible and isothermally from an initial volume of 40.0 liters at 310K, against an external pressure of 2.5 atmospheres.
Find the ideal thermal efficiency of the engine on the air-standard basis, if the exponent of the expansion and compression line is 1.35.
A small ball of mass m is attached to a very light string of length L that is tied to a peg at point P. What is the magnitude of the horizontal velocity that must be applied to the ball so that it swings up and lands on the peg?
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Meadas company makes shocks. The currently guarantee their shocks for 50,000 miles. The distance traveled before the shocks wear out is normally distributed with mean 63,000 and standard deviation 10,000. What % of shocks will fail at exactly 50,0
The pressure and temperature at the end of compression stroke are 800 kpa and 700 degree C. Determine the network if the pressure at the end of heat addition is 3 Mpa.
If 18.9 of 0.800 solution are needed to neutralize 5.00 of a household ammonia solution, what is the molar concentration of the ammonia?
Using activities, calculate the pH of a solution containing 0.010 M NaOH plus 0.012 M LiNO3. What would be the pH if you neglected activities?
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