Tuesday
May 21, 2013

# Posts by JOHN

Total # Posts: 5530

Chemistry
Thank you so much Dr.Bob222. You have my eternal gratitude.

Chemistry
Solid Na2SO4 is added to a solution which is 0.020 M in Pb(NO3)2 and 0.045 M in AgNO3. Assume the volume remains constant. Ksp = 2.0 10-8 for PbSO4 and Ksp = 1.2 10-5 for Ag2SO4. What is the concentration of the first ion precipitated when the second ion starts to precipitate?

physics
The effective value of g is inversely proportional to the SQUARE of the distance from the center of the earth. The radius of the Earth is 6378 km. At 5100 km altitude, you are 11,478 km from the center. g will lowered by a factor (6378/11478)^2 Credit to "drwl"

physics
Isn't "g" constantly -9.8 m/s/s, regardless of height?

Math
What do you mean by median? Do you mean average?

Algebra
Distribute the 0.03, 0.17y+0.03y+270=870 0.17y+0.03y = 600 0.20y=600 y= 3000

English
Could you please check the grammar in the following sentences? Thank you very much in advance. 1.I had just turned off the light to go to sleep and I was dozing off when I felt/experienced the greatest fear in my life 2.He had tried to get in touch with Sam when he arrived in ...

Algebra
What is the sum of all the possible values of a for which 25x^2 + (a-15)x + 9 has exactly one distinct real root?

Algebra
How many distinct prime factors does 100100 have?

english
what is girl in this sentence Sarah is a very smart young girl with a bright future. Is it a predicate nominative

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