Sunday
December 8, 2013

# Posts by george

Total # Posts: 837

physics
block A (mass 2.04kg) rests on a tabletop. It is connected by a horizontal cord passing over a light, frictionless pulley to a hanging block B (mass 3.00kg ). The coefficient of kinetic friction between block A and the tabletop is 0.215. After the blocks are released from res...

Stats
Calculate the expected value and standard deviation of X, the number of on the job accidents: Accidents 0,1 2 Probability .5, ?, .2 P(X=1) = E(x) = µx = Standard deviation =

Stats
Let Y be a random number between 0 and 1 produced by the idealized uniform random number generator with density curve pictured in the following figure: P(<Y<0.4) = P(0.4<Y<1) = P(0.3<Y<0.5)+

Trigonomety question
How do you find the exact value of Sin(13pi)?

Chemistry
A compound Contains 14.5g of magnesium and 3.5 g of oxygen. what the mass of oxygen in the compound ?

Algebra
How did you arrive at that answer?

Algebra
A bean sprout grows 3 inches in its first week, 2 inches in its second week, and 1.333 inches in its third week. If the sprout's growth follows this pattern, how much will the bean sprout have grown in its fourth week?

science
The universal wave equation states that v = fë, therefore wavelength is directly related to the speed of the wave. That means that if the frequency is increased, the speed is also increased and vice versa, as long as frequency is kept constant.

math
2x+x=72 3x=72 x=24 2x=48 The two lengths of rope are 24 and 48 inches

Precalc/Trig
wave is modeled by the function ... h(t) = 3cos(p/10)*t What is the period of the wave (T) *frequency (F) is defined as the number of cycles of the motion per second. What is the relationship between F and T? Find the wave height (H) which is the vertical distance between the ...

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