Saturday
February 13, 2016

Posts by Charlie

Total # Posts: 439

english
which is correct?"What a disaster,"shouted Maria. "What a disaster!"shouted Maria!
March 27, 2008

Physics
A movie stunt man (mass 82.3 kg) stands on a window ledge 5.69 m above the floor. Grabbing a rope attached to a chandelier, he swings down to grapple with the movie’s villain (mass 72.3 kg), who is standing directly under the chandelier. (Assume that the stunt man’s ...
March 13, 2008

Physics
Ice-hockey star Wayne Gretzky is skating at 12.7 m/s toward a defender, who in turn is skating at 5.39 m/s toward Gretzky. Gretzky’s weight is 677 N; that of the defender is 869 N. Immediately after the collision, Gretzky is moving at 2.21 m/s in his original direction. ...
March 13, 2008

Math
Find a third-degree polynomial Q such that Q(1)=0, Q'(1)=0, Q''(1)=2, and Q'''(1)=12.
February 29, 2008

Physics
An engine is used to pull a train of two cars out of a mine. The floor slopes upward at an angle of 24o. Each car has a mass of 0.8x104 Kg and normally travels without friction on the tracks. The engine can exert a maximum force of 1.4x105 N on car A. If the engineer again ...
February 24, 2008

Chemistry
N2H4(g) + H2(g) 2 NH3(g) H1 = –1876 kJ 3 H2(g) + N2(g) 2 NH3(g) H2 = –922 kJ The H f for the formation of hydrazine: 2 H2(g) + N2(g) N2H4(g) will be
February 22, 2008

science
what are 3 types of symbiosis
February 15, 2008

Physics
Thank you so much.
February 8, 2008

Physics
A 10,000N car comes to a bridge during a storm and finds the bridge washed out. The 650-N driver must get to the other side, so he decides to try leaping it with his car. The side the car is on is 16.6 m above the river, while the opposite side is a mere 7.90 m above the river...
February 8, 2008

english
in to kill a mocking bird who leaves their shoes at the school??? who does scout escort home?? whoes education does atticus help finance and who urges scout to stand up out of respect for atticus???
January 28, 2008

math
You can always dig up an extra player
December 16, 2007

math
a bathtub can be filled by the hot and cold water pipes in four minutes and, when full, can be emptied by the waste pipe in five minutes. If it is half full and all three pipes are set running, when will the tub be filled?
October 25, 2007

business studies
I was wondering could anyone help me with question 6 an page 302 of the Business Studies for households and enterprises Junior Certificate by Matt Hynes
October 13, 2007

CHEM
A 5.00 g sample of Al pellets (specific heat = .89 J/g degrees c) and a 10.00 g sample of Fe pellets (specific heat = .45 J/g degrees c) are heated to 100.0 degrees C. The mixture of hot Fe and Al is then dropped into 97.3 g of water at 22.0 degrees C. Calculate the final temp...
October 1, 2007

Chemistry
i don't even understand what the problem is asking.
October 1, 2007

CHEM
A 5.00 g sample of Al pellets (specific heat = .89 J/g degrees c) and a 10.00 g sample of Fe pellets (specific heat = .45 J/g degrees c) are heated to 100.0 degrees C. The mixture of hot Fe and Al is then dropped into 97.3 g of water at 22.0 degrees C. Calculate the final temp...
October 1, 2007

physics
why are the lengths of days in spring and autumn the same? if the sun does not set, why is it so cold?
September 21, 2007

One for Drwls (calc)
Thanks bob, and thanks to drwls too, in the earlier ones. Charlie.
September 15, 2007

One for Drwls (calc)
Sorry, you're so quick, I took one of your answers for another question! Finally, Therefore, given my scenario, I could use the integral to calculate the area under the curve described by the derivative? Charlie.
September 15, 2007

Calculus
Great, and thank you very much. Charlie.
September 15, 2007

Calculus
"My reasoning is that 'undoing' the derivative gives me the derivative." oops, meant to write ......gives me the integral.
September 15, 2007

Calculus
Thanks- that was quick! Therefore, given my scenario, I could use the integral to calculate the area under the curve described by the derivative? Charlie.
September 15, 2007

Calculus
If I have a function f(x), and am given its derivative, f'(x): may I take it as a given that f(x) is an integral of f'(x). My reasoning is that 'undoing' the derivative gives me the derivative. Eg is 1/3x^3 an integral of x^2? Thanks.
September 15, 2007

english
complete subject and simple subject of this sentence. Ties in fancy boxes are gifts for some valentines.
September 11, 2007

english
complete subject and simple subject of this sentence. They can be funny or serious.
September 11, 2007

english
whats another word for private? http://www.answers.com/private Scroll down and look for synonyms. =)
August 15, 2007

history
What caused the British government to take action with regard to the atrocities committed in the Congo by King Leopold's colonial managers in 1904? charlie, maggie, dali, or whoever, http://www.jiskha.com/search/search.cgi?query=atrocities Skip the first two links here, ...
August 15, 2007

history
Offer evidence to prove that the Congo Free State violated Articles I,V,and VI of the Berlin Act of 1885. Check this answer. http://www.jiskha.com/display.cgi?id=1186771696
August 15, 2007

Calculus:check please
given: 1st derivative is 2(2-3x-2x^2)/(1+x^2)^2 (quotient rule) I've found the stationary points to be x=1/2 and x=-2 Am I on the right track? If so, I plan to plug in values to the L andR of them into the whole derivative so as to clasify them. Still on track? Thanks ...
August 10, 2007

Graphing Functions
Can someone point me to a starting point in graphing f(x)= 25/cos x If it weren't a fraction and a cosine, I'd try to build a table of coordinates. This one, I have no start point. Thanks
August 2, 2007

science ( physics)
hello, i am having trouble with this problem. Calculate the average force of friction acting on a wood block as it is propelled along the floor by an elastic band ? my solution and my ideas: What does it mean by average froce of friction? I first weighed the peice of wood to ...
May 30, 2007

Physics please check
Answer is Counter Clock Wise
April 24, 2007

English
I wrote, "I like to swim in summer." My teacher marked it wrong and said it should read "I like to swim in THE summer." Can anyone offer an explanation, please, why my way is wrong? I don't know why it was marked wrong. Both with and without "the&...
April 17, 2007

biology/chemistry
Please help i am on a dead line and am stuck on this question, Gametes produced in the process of meiosis in humans (chromosome 4)has a long and short arm the short arm has the gene for Huntington's (H) attached and the long arm the gene for Red hair (R) i need to show (i...
April 10, 2007

One for drwls
Thank you for answering my question. Can you steer me to making a quadratic from 1/4(x+3)^2-4 Then I can get the intercepts. Thanks Just multiply it out to put it in the standard form, ax^2 + b^2 + c (1/4)(x+3)^2-4 = (1/4)(x^2 + 6x + 9) -4 = (1/4)x^2 + (3/2)x - 7/4 You're ...
March 21, 2007

Algebra
I'm trying this again, I'd like the quadratic form, so i can then work the intercepts myself. SO: what's the quadratic form of 1/4(x+3)^2-4 I need it to find the intercepts of the parabola it describes. Check: I think the parabola is 1/4 scaled, moved 3 to the left...
March 21, 2007

math
what's the quadratic form of 1/4(x+3)^2-4 I need it to find the intercepts of the parabola it describes. Check: I think the parabola is 1/4 scaled, moved 3 to the left and down 4 compared to a y=x^2 parabola. Is this ok? If you are looking for the intercepts, you will have...
March 20, 2007

egypt mummification
thx a lot....this saved me alot of time
February 8, 2007

PHYSICS HELP
It increases
October 16, 2006

  1. Pages:
  2. <<Prev
  3. 1
  4. 2
  5. 3
  6. 4
  7. 5