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Questions (917)
Let Θ1, Θ2, W1, and W2 be independent standard normal random variables. We obtain two observations,
X1=Θ1+W1,X2=Θ1+Θ2+W2.
1 answer
4,143 views
B owes $3000 due 2 years from today without interest and $2000 with interest at 4% compounded quarterly due in 6 years from
0 answers
577 views
if one card is drawn from a normal pack of 52 playing cards,what is the probability of getting a king or a heart?
1 answer
517 views
given the following equations:
2x-3y=10 3x=4y=15 which one of the regression equation x on y? show computation
3 answers
5,980 views
The denominator of a certain fraction exceeds the numerator by 1. The reciprocal of the fraction exceeds 3/4 by 7/12. Find the
1 answer
669 views
two brothers together owned 1/3 of a small rice mill valued at 1,260.000. One brother owned 3/7 as much as the other. What is
2 answers
524 views
Light from a coherent monochromatic laser of wavelength λ=2.29e-4 m is incident on two slits, both of width a, separated by a
1 answer
686 views
A circuit is composed of a capacitor C=3 μF, two resistors both with resistance R=69 Ohm, an inductor L=6.00e-2 H, a switch S,
1 answer
709 views
I have a 40 ml solution of pH 4.36. I need to make this solution at pH 8.5 by adding extra 10 ml of HCl and NaOH. Thanks
1 answer
456 views
I want to make solutions of pH 3.5, 4.5, 6.5, 8.5 and 10.5 from 0.1 M HCl and 0.1 M NaOH. how many ml shall I take from each
0 answers
335 views
if you stand at one side os a stage with hard parallel side walls 17m apart and make a handclap, how often do the flutter echoes
0 answers
508 views
Suppose you make a tape recording of a male voice singing slowly and playing it back at double speed.
What will happen to the
1 answer
1,426 views
The trombone's low B flat 2 is played with the slide in first position. What is its effective length, that is the length of an
0 answers
502 views
The clarinet's lowest note is D3, 147 Hz. What is its effective length, that is, the length of an idealized closed pipe that has
1 answer
1,105 views
Given that the oboe's lowest note is B flat 3 and its length approximately 64 cm, what length would you expect for the bassoon,
0 answers
812 views
The mass of 1 cubic meter of air at sea level is about 1.3kg. much does it weight in newtons? How much would a stack of 8000
0 answers
722 views
The speed of radio waves is 3*10^8m/s, the same as the speed of light. If a spacecraft transmits a radio signal with frequency
2 answers
1,074 views
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