Saturday
August 30, 2014

Posts by xavier


Total # Posts: 144

Physics
The lead female character in the movie Diamonds Are Forever is standing at the edge of an offshore oil rig. As she fires the gun, she is driven back over the edge and into the sea. Suppose the mass of a bullet is 0.005 kg, and its velocity is +726 m/s. Her mass (including the ...
October 24, 2010

Physics
For tests using a ballistocardiograph, a patient lies on a horizontal platform that is supported on jets of air. Because of the air jets, the friction impeding the horizontal motion of the platform is negligible. Each time the heart beats, blood is pushed out of the heart in a...
October 24, 2010

Physics
In an action-adventure movie, the hero lifts the 89-kg villain straight upward through a distance of 2.0 m in 0.47 s at a constant speed. What power does the hero produce while doing this?
October 24, 2010

Physics
A pitcher throws a 0.140-kg baseball, and it approaches the bat at a speed of 35.0 m/s. The bat does Wnc = 65.0 J of work on the ball in hitting it. Ignoring air resistance, determine the speed of the ball after the ball leaves the bat and is 25.0 m above the point of impact
October 24, 2010

Physics
A roller coaster (340. kg) moves from A (5.00 m above the ground) to B (28.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long climb. What is the ...
October 24, 2010

Physics
The height of a certain waterfall is 33.2 m. When the water reaches the bottom of the falls, its speed is 25.8 m/s. Neglecting air resistance, what is the speed of the water at the top of the falls?
October 24, 2010

physics
A person pulls a toboggan for a distance of 20.0 m along the snow with a rope directed 25.0° above the snow. The tension in the rope is 85.0 N. (a) How much work is done on the toboggan by the tension force? (b) How much work is done if the same tension is directed ...
October 23, 2010

physics
A power boat of mass 465 kg is cruising at a constant speed of 8.9 m/s. The propeller provides a drive force of 765 N. The driver of the boat shuts off the engine, and the boat coasts to a halt. Assume-contrary to fact-that the resistive force due to the water is constant, ...
October 23, 2010

Physics
A 4.5 104-kg space probe is traveling at a speed of 15000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 3.0 105 N over a distance of 2400 km. What is the final speed of the probe?
October 23, 2010

Physics
At a time when mining asteroids has become feasible, astronauts have connected a line between their 3760-kg space tug and a 6100-kg asteroid. Using their ship's engine, they pull on the asteroid with a force of 490 N. Initially the tug and the asteroid are at rest, 490 m ...
October 3, 2010

Physics
A 83.0-kg person stands on a scale in an elevator. What is the apparent weight when the elevator is (a) accelerating upward with an acceleration of 1.80 m/s2
October 3, 2010

Physics
At a time when mining asteroids has become feasible, astronauts have connected a line between their 3760-kg space tug and a 6100-kg asteroid. Using their ship's engine, they pull on the asteroid with a force of 490 N. Initially the tug and the asteroid are at rest, 490 m ...
October 3, 2010

grammar
Thanks, I couldn't remeber the rule.
September 29, 2010

grammar
Which sentence is correct I feel that us students.... or would it be I feel that we students... I think its us but I am not certain
September 29, 2010

physics
A 435-kg sailboat has an acceleration of 0.80 m/s2 at an angle of 50° north of east. Find the magnitude and direction of the net force that acts on the sailboat
September 29, 2010

Physics
To hoist himself into a tree, a 66.0-kg man ties one end of a nylon rope around his waist and throws the other end over a branch of the tree. He then pulls downward on the free end of the rope with a force of 366 N. Neglect any friction between the rope and the branch, and ...
September 29, 2010

Physics
During a circus performance, a 75-kg human cannonball is shot out of an 19-m-long cannon. If the human cannonball spends 0.94 s in the cannon, determine the average net force exerted on him in the barrel of the cannon
September 29, 2010

physics
In the javelin throw at a track and field event, the javelin is launched at a speed of 29 m/s at an angle of 35° above the horizontal. As the javelin travels upward, its velocity points above the horizontal at an angle that decreases as time passes. How much time is ...
September 15, 2010

6th grade language arts
a book listing many itmes is called a.... the word ends in logue
April 28, 2010

2nd grade
add 16 and 11. can you divide your answer by 2 and get an equal number?
April 20, 2010

6th grade math
thank you very much for the help
April 20, 2010

6th grade math
oh i thought it was 5 times what minus 2 equals 7. not -5
April 20, 2010

6th grade math
where does the -5 come in?
April 20, 2010

6th grade math
7=2-5m; m my answer key says -1 but I dont know why it would be that. Can you explain?
April 20, 2010

pre algebra
thanks, I got negative 5 because I had it written in my final step as 7-12
March 18, 2010

pre algebra
1/3p+7=12-2/3p is the answer -5?
March 18, 2010

science
is there a such thing as a three part lquied supion
January 13, 2010

english
i dont know
May 27, 2009

history/historiography
I googled before I came here, but perhaps I can return at a later time when I have something more substantial for posting . . . Thank you for your time! Thanks, Ms. Sue!
March 17, 2009

history/historiography
I am supposed to be getting acquainted with a person named Fernand Braudel. All I know at this early stage is that he must be a historian or a theorist of significance to the doing of history. It would really make my day if some individual here could give me a push in the ...
March 17, 2009

WORLD HISTORY EXAM 3 HELP PLEASE?!?
After Stalin died in 1953, the number of people sent to the gulag
January 9, 2009

Math
56+45+56=
December 14, 2008

Math/Stats
In the last senatorial election in New Jersey, the republican candidate got 48% of the vote. During the election an exit poll was conducted by radio station WSTAT. Ten voters selected at random where asked if they voted for the republican candidate. (a) Let X = "Number of...
November 9, 2008

Accounting
On January 1, 2008, Boston Enterprises issues bonds that have a 3,400,000 par value, mature in 20 years, and pay 9% interest semiannually on June 30 and December 31. The bonds are sold at par. How much interest will Boston pay (in cash) to the bondholders every six months? ...
June 27, 2008

math
by simplifying,show that (2x-3)(2x+3)-(x-4)^2= 3x^2+8x-25
April 9, 2008

Capitalization
to help prevent pollution, people could walk, ride bikes, and use public transportation.
April 6, 2008

science
explain an abstract
January 14, 2008

Franny
ô rage ! ô désespoir ! ô vieillesse ennemie... ô rage ! ô désespoir ! ô vieillesse ennemie ! N'ai-je donc tant vécu que pour cette infamie ? Et ne suis-je blanchi dans les travaux guerriers Que pour voir en un jour ...
January 9, 2008

Alegbra1
the length is 10 inches, the height is 4 inches,and the width is 8 inches. How many cubic inches of soil does the plant hold. (hint V=LWH
October 25, 2007

French
@- SraJMcGin: Permettez moi de corriger une erreur : On dit "Qui est-ce QUI le fera? " et non pas Qui "est-ce que le fera?"
September 27, 2007

Finance
Bond Pricing: A 6-year Circular File bond pays interest of $80 annually and sells for $950. What is its coupon rate, current yield, and yield to maturity? Bond Pricing : If the Circular File wants to issue a new 6-yar bond at face value, what coupon rate must the bond offer?
March 19, 2007

Math
Bond Yields. An AT&T bond has 10 years until maturity, a coupon rate of 8 percent, and sells for $1,100. a. What is the current yield on the bond? b. What is the yield to maturity?
March 19, 2007

Physics
Change in X = 1/2at^2 a=10 t=6 1/2(10)(36)= 1/2(360)= 180m
December 28, 2006

Economics
Refer to the above diagram. If the initial aggregate demand and supply curves are AD0 and AS0, the equilibrium price level and level of real domestic output will be:
August 15, 2006

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