How many grams of h2 and he are present
Hydrogen and helium are mixed in a 20.0 L flask at room temperature (20oC). The partial pressure of hydrogen is250 mmHg adn that of helium is 75 mmHg. How many grams ofH2 and He are present?
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In a particular game, a fair die is tossed. If the number of spots showing is either 4 or 5, you win $1, if the number of spots showing is 6, you win $4, and if the number of spots showing is 1, 2, or 3, you win nothing. Let X be the amount that y
If the surface is illuminated by light of wavelength 500 nm and 300 nm, for each case are photoelectrons produced and if so what is their kinetic energy in MeV? Note 1 nm = 10-9 m.
Suppose X has a geometric distribution with probability 0.3 of success and 0.7 of failure on each observation. The probability that X = 4 is
Use energy methods to calculate the speed of the climbers after the lower one has descended 1.80 m starting from rest. What would be the speed of the climbers after they had moved 1.80 m?
A set of 10 cards consist of 5 red cards and 5 black cards. The cards are shuffled thoroughly and you turn cards over, one at a time, beginning with the top card. Let X be the number of cards you turn over until you observe the first red card. The
At a lumberjack competition an axe with a mass of 1.25 kg is thrown at a target with a speed of 43 m/s. When it hits the target, it penetrates to a depth of 0.047 m. (a) What was the average force exerted by the target on the axe?
Suppose we select and SRS of size n=100 from a large population having proportion p of successes. Let X be the number of successes in the sample. For which value of p would it be safe to assume the sampling distribution of X is approximately Norma
A copy machine dealer has data on the number x of copy machines at each of 89 customer locations and the number y of service calls in a month at each location. Summary calculations give x(bar)=8.4, s(sub x)=2.1, y(bar)=14.2, s(sub y)=3.8, and r=0.
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