Friday
December 13, 2013

# Posts by lydia

Total # Posts: 151

biology
Can someone please help me with this question? Thanks! What organic molecules make up the structure that surrounds the DNA molecule?

math
Describe all the points on the Earth’s surface that are exactly 4000 miles from the North Pole. If you need to, use 3960 miles for the radius of the Earth.

math
Describe all the points on the Earth’s surface that are exactly 4000 miles from the North Pole. If you need to, use 3960 miles for the radius of the Earth.

Trignometry
An isosceles triangle has two sides of length w that make a 2á-degree angle. Write down two different formulas for the area of this triangle, in terms of w and á (Greek “alpha”). By equating the formulas, discover a relation involving sin 2á, sin...

I guess it would be 7 feet on each side. THANKS JOE!!!!!!!!!!!:D

I guess it would be 7 feet on each side. THANKS JOE!!!!!!!!!!!:D

geography
Would Ireland be considered a developed country? How wealthy is it in comparison to other countries? Thanks!

history
Is it true that during the McCarthy era that if accused communists gave names of other communists then they would be let off the hook? Like, how did it work when McCarthy asked people for names? Thanks!!!

Physics
A string has a linear density of 6.7 x 10-3 kg/m and is under a tension of 210 N. The string is 1.6 m long, is fixed at both ends, and is vibrating in the standing wave pattern shown in the drawing. Determine the (a) speed, (b) wavelength, and (c) frequency of the traveling wa...

Physics
The transverse standing wave on a string fixed at both ends is vibrating at its fundamental frequency of 250 Hz. What would be the fundamental frequency on a piece of the same string that is twice as long and has four times the tension? I know the equation f=v/2L. and that v=(...

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