Friday
November 28, 2014

Posts by Beth


Total # Posts: 621

physics
A friend in a spaceship travels past you at a high speed. He tells you that his ship is 20m long and that the identical ship you are sitting in is 19m long. According to your observations, (a) how long is your ship?? (B) how long is his ship?? (c) what is the speed of your ...
May 29, 2007

physics
A box is cubical with sides of proper lengths L1=L2=L3=2.0m when viewed in it own rest frame. If this block moves parallel to one of its edges with a speed of 0.80c past an observer, (a) What shape does it appear to have to this observer, and (b) What is the length of each ...
May 29, 2007

physics
A person has far points 8.44cm from the right eye and 12.2cm from the left eye. WRite a presciption for the powers of the corrective lenses. Please help i tried to read to book and my notes but it doesnt show how to do this problem. http://www.owlnet.rice.edu/~phys126/Labs/...
May 24, 2007

Algebra
Please help me complete the square...I'm lost! x^2+y^2-1/2=-x-y
April 4, 2007

science
Why dont perfect convection currents reach the North Pole from the equator? Land masses and other currents interfere.
March 25, 2007

Punctuation
I need to be sure that I punctuated these sentences properly. Each group emphasizes on a particular punctuation mark. Punctuation within Sentences—Colon 1.
March 19, 2007

Spanish
how do you say book,desk, pen, pencil, notebook, folder, paper and book in spanish?
February 5, 2007

math/reading
If a=1, b=2, c=3, d=4, e=5, f=6 I need to find any combination of these letters that creates a number value more than 30. you can use the letters as many times as you need to. so far I can only think of effaced, but that is only 30.. any help?
January 31, 2007

Chemistry
Alkanes have weaker intermolecular forces than alcohols because they have no hydrogen bonding, only dispersion forces.
January 22, 2007

math
Determine whether this function has a mzximum or minimum value and then find that value: f(x)=2x^2 + 3x -9 The derivative, f'(x) = 4x +3, is zero when x = -3/4 . That means there is a relative extreme value (either maximum or minimum) there. The second derivative is f'...
December 28, 2006

3rd grade social studies
cool thanks
December 5, 2006

Fact Familys
cool what would this one be 7 8 15
November 30, 2006

unknown riddle
"JOHN DECIDES HE DOESn'T WANT TO WORK, HE TURNS OFF HIS LIGHT AND LEAVES. 200 PEOPLE DIE. WHAT WAS HIS JOB?" to turn off the light and leave The man who runs a lighthouse. You're missing the part of the story where the man is watching the news saying a ship ...
November 2, 2006

Math
(2 questions) Factor each expressions 1) 2c + 2d - cd - d^2 2) abd - abe + acd -ace First rearrange: 2c - cd + 2d - d^2 = c(2-d)+d(2-d)= (2-d)(c+d). The second one is done using the same kind of procedure. Post your work and tell us what you don't understand if you get ...
October 25, 2006

AP chem
It takes 208.4 kJ of energy to remove 1 mole of electrons from atom on the surface of rubidium metal. How much energy does it take to remove a single electron from an atom ont eh surface of solid rubidum? What is teh maximum wavelength of light capable of doing this? If 208.4 ...
October 1, 2006

Art
Okay, I am having to do a presentation on Installation art, and it's significance and it's purpose etc. It's more analytical than a book report kind of thing! Thank you for using the Jiskha Homework Help Forum. Here is a site that also has links for you: ...
September 20, 2006

finding midpoint of a line with given interval
my question is given the interval 2 is less than or equal to x which is less than or equal to 10; find the midpoint of a the line y = 4x+8 the midpoint x is given by x=1/2 (2+10)=6 what is y when x=6? THAT IS HARD CUZ I'M JUST IN ALGEBRA I AND WE HAVEN'T LEARNED THAT ...
August 7, 2006

Science
If you are one mile off the beach in the Atlantic Ocean, how deep is the ocean? Thanks for your help. Which beach? Is it in Europe, North America, Africa, South America or Antarctica? We'll try to research your question if we know the exact location of your beach. Since ...
August 5, 2006

Math
What is tbe next row of the following table? 0 2 2 2 0 0 0 0 0 0 2 4 6 4 2 0 0 0 0 2 6 12 14 12 6 2 0 0 2 8 20 32 38 32 20 8 2 2 2 2 4 6 4 2 2 6 12 14 12 6 2 2 8 20 32 38 32 20 8 (2) Notice in this arrangement any number is the sum of the number above it plus the numbers on ...
September 1, 2005

unscrambling word
it is a science term and could be more than one wrrd csellmpilbveyraeetee
June 14, 2005

unscrambling word
csellmpilbveyraeetee
June 14, 2005

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