Monday
September 22, 2014

Posts by DAS


Total # Posts: 38

Physics
Dude, Edx is for you to solve on own. Not copy-pasting in forums for others to solve for you.
March 13, 2013

Calculus
Verify the identity. (Left side to right side) {(sinu+sinv)/(cosu+cosv)}=tan1/2(u+v)
May 2, 2012

physics
A 250-kg crate is pushed horizontally with a force of 710 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.
October 18, 2010

math
two equations two unknowns: 3r - 2s = 0 2r + 3s = 13 3r - 2s = 0 =>r=2s/3 Substituting in (eqn 2)=> 2*2s/3 +3s = 13 solve for s =>s((4/3)+3)=13=>s(13/3)=13=>s=3=>using eqn 1 r=2
June 8, 2009

math
use order of operations First solve in parentheses then exponents then multiplication and division then addition and subtraction. 5(-39-(-74-85))=5(-39+(159))=5(120)= 600
June 8, 2009

Math
you have to divide both sides by a negative 0.4 doing this changes the < to > by rule. x>-12/-.4 = x>30
June 8, 2009

math
f(x)=-9x-10 if you read your text it states that slope intercept form is y=mx+b where m is the slope here -9 and b is the y (or f(x) )intercept -10. to find the solution to the system look at the solution I gave for your other problem and use the same technique
June 8, 2009

Math
solve both of the equations for y if the slopes are recipricals of one another the lines are perpendicular otherwise if they are the same slope they are parallel
June 8, 2009

Psy285
Altruism is the selfless concern for the welfare of others. In order to answer this question you have to think why people help others (which is more philosophical).
February 9, 2009

math
(13/25)*100%= 52%
February 9, 2009

statistics
Easiest way to learn is search wikipedia quartile and t-test
February 9, 2009

3rd grade-social studies
4 important natural resources found in michigan
February 5, 2009

Math
212 min / 60 min/hr = 3 hrs 32 minutes + 9 hrs = 12 hrs 32 minutes
February 4, 2009

chemistry
petroleum has many different compounds all with different chain lengths so if it is heated the smaller chain length molecules rise and the heavier stay at the bottom due to density differences
February 4, 2009

Truman College
or 1.11 to 1
February 4, 2009

Truman College
10 to 9
February 4, 2009

3rd
Three stooges Three blind mice Three pointers Crowds
February 4, 2009

physics
Reflections, shadows,etc.
February 4, 2009

3rd
whats more.... The lives of a cat The lineup of a baseball team The pins in 9-pins or balls in billiards The number of stitches saved by a stitch in time Odin hung himself from a tree for nine day
February 4, 2009

3rd
baseball team
February 4, 2009

biology
I believe electrons in the Chloroplasts pigments are energized to create atp
February 4, 2009

4th grade
Perkiomen is a Native American word derived from Pakihmomhimk or "Place of Cranberries"
February 4, 2009

statistics
there is no following? but nominal refers to data that is close to but not exactly the same
February 4, 2009

government
James Madison he was the principal author
February 4, 2009

math
soccer team
February 4, 2009

Physics
for the first one find the amount moved total east west. Movement lateral=(east)- (west) 30cm - 15cm = 15 cm now find the longitudinal movement Movement longitudinal = 25 cm the maginitude is the distance moved relative to original postion which is given by the distance ...
February 4, 2009

science
Density is mass/unitvolume. for instance the density of water is approximately 1000 grams per Liter. So in one liter of space there is 1000 grams of water.
February 4, 2009

science 12 grade
3.5km *1000 m/ km = 3500m
February 4, 2009

Math
it looks like you could just solve for 2^x=(1*365*24*3600) =>xln(2)=ln(1*365*24*3600) => x=ln(1*365*24*3600)/ln(2) oh and at 1 for the series begining at 1 not zero. appoximately 26 times.
February 4, 2009

Renaissance
The Bubonic Plague was one
February 4, 2009

Biology
I believe that one accompanies acute lymphoblastic leukemia.
February 4, 2009

Chemistry
When components are alike they tend to be able to dissolve one another. water is a polar molecule where as acetaminophen is also polar so it will dissolve
February 4, 2009

Science
The abyssal plain is formed when the lower crust (sima), is melted and pushed up by the up-welling mantle, reaches the surface at mid-ocean ridges and forms new oceanic crust. Therefore it is mainly composed of basalt or volcanic rock not so much sand which is wearing of ...
February 4, 2009

Probability
Suppose the prevalence of people with certain cancer in a give year is 0.015. In addition suppose that the diagnostic test for this cancer is know to have a false positive rate of 0.05 and a false negative rate of 0.10 . Suppose a person is aware of the false positive and ...
February 4, 2009

math
one can determine if two lines are perpendicular if thier they share a common point and the product of thier slopes are -1
February 4, 2009

Chemistry
2.5 moles of each implies 86.18g/mole*2.5moles=215.5g 215.5 g / .660 g/mL = 326.4 mL 88.15 g/mole * 2.5moles=220.4g 220.4 g / .814 g/mL = 270.7mL
February 3, 2009

Physics - URGENT
speed of sound in air at atmosphere v = 331 m/s + (0.6 m/s/C)•T v=wavelength * Frequency => wavelength= v/Frequency = 0.46 m if 732 were first harmonic => Length being 7th harmonic = 7 * 0.46 m = 3.22 m
February 3, 2009

physics!!
figure?
February 3, 2009

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