Sunday
October 23, 2016

# Posts by Jacob

Total # Posts: 820

Physics
Wong is standing on a turntable in class holding a weight in each hand a distance .75 meters from the center of his body. He is originally rotating with an angular frequency w=0.3 rad/s. He pulls the weights in so they are only .25 meters from the axis of rotation. The ...
April 13, 2010

physics
A box is pulled across a horizontal surface at a constant speed by a horizontal rope with tension T=30N. The coefficient of friction between the box and surface is uk = 0.05. 1. Calculate the work done by friction as the box moves 4 meters to the right. i thought it would be ....
April 13, 2010

physics
momentum is p=mv so p(brother)=(35.6)(9.50)and p(skateboard)= (1.3)(9.50) solve and add them.
April 13, 2010

Physics
A student gets a 2.9 kg mass to oscillate up and down on bottom of a light vertical spring by pulling her hand up and down on the top end of the spring. The spring is a real spring with a spring constant of 93 N/m and a damping constant of 0.7 N sec/m. (b) The student now ...
April 13, 2010

Physics
Two geekie physics students with a combined mass of 131 kg jump into their old car to run out for some late night pizza. The distance between the front and back axles of the car is 2.9 m. When they get in the car, the springs compress a total of 9.3 cm. On their way to the ...
April 13, 2010

trigonometry
It would be 2pi/6 because period (1 oscillation) = 2pi/b
April 13, 2010

Physics
A student gets a 2.9 kg mass to oscillate up and down on bottom of a light vertical spring by pulling her hand up and down on the top end of the spring. The spring is a real spring with a spring constant of 93 N/m and a damping constant of 0.7 N sec/m. (a) At what approximate ...
April 12, 2010

Physics
Two geekie physics students with a combined mass of 131 kg jump into their old car to run out for some late night pizza. The distance between the front and back axles of the car is 2.9 m. When they get in the car, the springs compress a total of 9.3 cm. On their way to the ...
April 12, 2010

physics
A student throws a 9 gram of gum is thrown across the physics lab from a distance of 2.5 m. When the gum has a horizontal velocity of vo it connects with a mass on the end of 1.62 kg simple pendulum which is initially at rest. The pendulum has a length of L of 0.74 m. The gum ...
April 12, 2010

Physics
nvm i got it, thanks for the help guys.
April 9, 2010

Physics
can you write me some kind of a equation or explain to me in a way which i can understand. because what they wrote is just flying over my head and i have already spent a good amount of time trying to figure these out. so please help
April 9, 2010

Physics
A physics student of mass mm = 100 kg gets a summer job painting houses. On his first project, he builds a platform using large pine board with a mass of mb = 60 kg The board has an overall length of L = 8.5 meters and set on two 1 meter tall saw horses so that l = 2.25 ...
April 9, 2010

Biology---Urgent!
if you are using APA, then its the (author, p. 4-9) I believe.
April 5, 2010

Chemistry New question
If 12.5 mL of 8.6 multiplied by 10-2 M NaOH is added to 32.5 mL of 6.0 multiplied by 10-4 M NaOH, what is the pH of the solution?
April 5, 2010

Chemistry: Acid Base Equilbria
pH = .5 (pka1)
April 5, 2010

Chemistry
A 1.50 M solution containing 25 Grams of Al(OH)3 would occupy what volume in liters?
March 29, 2010

map
How do you draw a net duagram for a group of cubes???!!!
March 23, 2010

March 19, 2010

What events led up to the Civil War? A State's Rights B Slavery C All of the above
March 19, 2010

Who was the 21 president?
March 19, 2010

Who was the 100 year war between? I honestly have no idea.
March 18, 2010

What did the 100 year war do the economy?
March 18, 2010

Neither sides are involved in a war perhaps.
March 17, 2010

english
after the rain ended, the sky became blue --is this a complex sentence?
March 14, 2010

english
the sentence--marsha speak excellent german should german be capitlized
March 12, 2010

math
Hey I need some help with this problem. Any ideas on how to solve it? Thanks lots. : A hardware supplier manufactures three kinds of clamps, types A, B and C. Production restrictions require them to make 10 units more type C clamps than the total of the other types and twice ...
March 12, 2010

english
compound words -which is correct thirty one -self-evident -QUICKLY-RUNNING -OR SPUR OF THE MOMENT-DECISION
March 11, 2010

Geography
reduced the number of Communist nations in the world did not afffect the United States change boundries in Europe ---------------------- A referendum for the preservation of the USSR was held on 17 March 1991, with the majority of the population voting for preservation of the...
March 10, 2010

Science-Chem
Sucrose, C12H22O11, is burned to produce carbon dioxide and water. What is the balanced formula and reaction type?
March 8, 2010

math
Bill, Ernie, Oscar, Sammy and Tony are the five basketball players on the starting team of the varsity squad. Each one is known by a different one of these five nicknames: Slats, Stretch, Tiny, Tower, and Tree. From the information given, determine the nickname of each player ...
February 24, 2010

math
Bill, Ernie, Oscar, Sammy and Tony are the five basketball players on the starting team of the varsity squad. Each one is known by a different one of these five nicknames: Slats, Stretch, Tiny, Tower, and Tree. From the information given, determine the nickname of each player ...
February 24, 2010

For each of the following water-soluble compounds, indicate the ions present in an aqueous solution: NaI K2SO4 NaCN Ba(OH)2 (NH4)2SO4 would the answer to NaI be Na+ I-? Should there be more to my answer? Would K2SO4 be K+ SO-? Thanks for the explanation.
February 22, 2010

Which of the following are strong electrolytes? BaCl2 AgNO3 PbI2 Pb(NO3)2 KI I think they are all strong electrolytes. Is this correct?
February 22, 2010

Math
looking for help with find the slope and the y intercept for y = 5 please help
February 18, 2010

AP Chemistry
The heat of reaction for burning 1 mole of a certain compound X is known to be -477.7 kJ. The calorimeter constant of the bomb being used is 2500 j/degree celsius and the initial temperature of the water is 23.2 degrees celsius. a) if 22.54 g of compound X (MM=46.0) is burned ...
February 15, 2010

could someone give me some examples of entertaining sentences?
February 9, 2010

grammar
We are proof reading phrases for errors. aunt rose, one of my favorite aunts This is my corrected phrase: Aunt Rose, one of my favorite aunts
February 2, 2010

math
A recipe that makes 9 servings calls for cups of juice. How many cups of juice are there per serving?
January 21, 2010

Geography
A. Land use is affected by settlement patterns. C. Settlement patterns provide information about the people living in specific areas. D. Resource availability influences where people settle. Relief,climate,resources,technology, Government policy influences the settlement ...
January 11, 2010

Trig
triangle with side lengths 172m, 155m, and 155m. calculate the area.
January 9, 2010

Physics
The 15.5639 is the time in second while the 7.7 is the rev per second. So the final answer should be the time times revolutions per second.
December 21, 2009

basics and tools of floral design
what is the most effective way for you to loctate local growners to supply your designs needs
December 16, 2009

factoring the tens how to find the product using rectangles
December 9, 2009

factoring the tens how to find the product using rectangles
December 9, 2009

Factor this expression completely 36y2 - 1
December 7, 2009

algebra 1
Factor completely 36x2 + 60x + 25 Factor completely 4n2 + 28n + 49
December 7, 2009

algebra 1
Factor this expression completely 9a4 - b2
December 7, 2009

british literature
Using an example from Macbeth, explain Shakespeare's use of chronographing in Macbeth. I understand that chronographing is the study of past events but I don't understand how that relates to Macbeth.
December 7, 2009

british literature
explain shakespeares use of chronographing in macbeth
December 7, 2009

Wave Motion Physics
A transverse wave on a string is described by the following equation. y(x, t) = (0.35 m) sin[(1.25 rad/m)x + (92.8 rad/s)t] Consider the element of the string at x = 0. (a) What is the time interval between the first two instants when this element has a position of y = 0.303 m...
December 2, 2009

Two mountains are 1.00 km apart. If their masses are identical (2.00 × 1010 kg), what is the force due to gravity between the mountains? Fg=(GMm)/ r^2 =(6.67x10^-11 N*m^2/kg^2)(1010kg) (1010kg)/ (1000m)^2 =6.80x10^-11 N But the possible answers are: 2.67x 10^4 N 1.33x 10...
November 22, 2009

grammar
our cat katie usually drags its food out of the dish when its happy -Capital at the beginning of the sentence -Comma after cat -Capital for the noun's name -Apostrophe on both 'its' to show posession -Period at the end of the sentence so: Our cat, Katie usually ...
November 22, 2009

physics
The following forces act on a hockey puck (round, rubber disk) sitting on a frictionless surface: F_1 = 12 N at 15 degrees; F_2 = 28 N at 125 degrees; and F_3 = 33.3 N at 235 degrees. All the forces are in the plane of the ice. Determine the net force on the puck.
November 16, 2009

Math
No,you can also multiply.
November 12, 2009

Math
Is it true that when you put together unequal groups, you can only add/
November 12, 2009

chemistry
Which one of the following is NOT a Lewis acid-base reaction? 1. ) Ca + S --> Ca2+ + S2- 2. ) BeF2 + 2 F- --> BeF42- 3. ) H+ + -O-H --> H-O-H 4. ) NH3 + BF3 --> H3N-BF3 i thought it was 1...but im not sure...but i know that 3 & 4 are definatly right.
November 8, 2009

How do I make a table for f(x) equals x-3
November 3, 2009

English
I hate to read and I did not read the book THe Guns of Navarone. I have to answer one question for four categories; Comprehension, Extending Understanding, Text Analysis, and Context Analysis. Help?
October 26, 2009

Science
How many stars form the bowl of the Big Dipper and What part of a carrot plant could be considered a wedge?
October 26, 2009

WITH A(0,2),B(6,2)AND C(4,4) APPLY THE RULE (1.5X,1.5Y) TO THE VERTICLES OF TRIANGLE ABC TO GET TRIANGLE PQR. COMPARE THE CORRESPONDING MEASUREMENTS(SIDE LENGHTS,PERIMETER,AREA, AND ANGLE MEASURES) OF THE TWO TRIANGLES? THIS IS THE 1ST QUESTION OF 5 I HAVE TO DO, AND I DON'...
October 21, 2009

HELPPPPP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The three smallest bones in the human body are located in the middle ear. What are they called?
October 20, 2009

Math
would the derivative of this be 0/1-1/0? problem: 5/x-x/6
October 19, 2009

math
7y-5+2y+7y-5+2y
October 13, 2009

math
a+2a+10-3a
October 13, 2009

math
x+x+5+2x+1
October 13, 2009

social economics politics
ok, i now see your previous responses.
October 12, 2009

social economics politics
What are the various methods of maintaining peace and unity in binational, multinational, and multiethnic states? What are the strengths and weaknesses of each method?
October 12, 2009

social economics politics
What are the various methods of maintaining peace and unity in binational, multinational, and multiethnic states? What are the strengths and weaknesses of each method?
October 12, 2009

Chemistry - Urgent
ahhh, I get it now. thanks a lot, I actually did learn how to do it now, believe it or not.
October 11, 2009

Chemistry - Urgent
Is there anyway you could work this one out for me and explain what you did? I would probably learn a lot better than all of this reasoning and proportions. It's greatly appreciated.
October 11, 2009

Chemistry - Urgent
Totally lost.
October 11, 2009

Chemistry - Urgent
Ok, I got that, but what do I do with the 3.16 ×10^23?
October 11, 2009

Chemistry - Urgent
Determine the mass of 3.16 ×1023 atoms Cl. Answer in units of g. How do you do this? Need to get it done really fast. Thanks for help.
October 11, 2009

Chemistry
so it would be 6.02 x 10^23 x 50? then whattt?
October 11, 2009

social economics politics
what are the various methods of maintaining peace and unity in binational, multinational, and multiethnic states? what are the strengths and weaknesses of each method?
October 11, 2009

Science
I can be three different states of matter, but not at the same time. I am necessary for life, but I can also destroy life. I can be under your feet, around your body, or over your haed. What am I?
October 11, 2009

english
Im a Danish student, and I've written this summary which I would like someone to correct. Thanks in advance! In the short story”Beyond the pale”, published in 1888, author Rudyard Kipling states via his narrator that one should stick to its caste. Trejago, who&#...
October 8, 2009

math
how do you write the math expression for the product of 82 and g
October 6, 2009

Mathematics
6/7 because 7/8 and 6/7
October 4, 2009

science
Nikki lives near the deepest ocean trench in the world.What country does she live in .
October 4, 2009

science
Name one land and ocean animal that migrate.
October 4, 2009

Calculus
plot it on a graph in your calculator. then see the number where the line continues to stay on for a y value. for example, lets say it will go up and down but when it hits x=4 the y value is 2 and every y value after that is 2, then the limit for infinity would be 2. also......
September 30, 2009

science
I can travel where are no molecules,but never through a brick.I can travel through space,but never around a corner.What am I?
September 21, 2009

Anatomy and Physiology
Hi, i have to right a research paper about the origins and history of a cancer. I do not know where to find this information. We can choose any type of cancer, but i do not know where to find this information(who first diagnosed it, when was it first diagnosed)
September 16, 2009

science
Scientist do experimental tests more than once so they can reduce the chance of errors. This is called conducting what?
September 8, 2009

In the story Alexander Who Used To Be Rich Last Sunday what did Nicky tell him to do with his dollar?
September 7, 2009

algebra
if x equals 0,1,2,3 and y = 5,10,15,20 what is the pattern written as an equation--please help can't figure out this one
September 4, 2009

social studies
why were european nation competing for land
August 25, 2009

math
Consider the set of northwestern states or provinces {Montana, Washington, Idaho, Oregon, Alaska, British Columbia, Alberta}. If a person chooses one element, show that in three yes or no questions, we can determine the element. Your Solution Hints œ I want you to ...
August 8, 2009

Physics
Resolve a displacement of 700 cm into two components along direction lines that lie on opposite sides of the displacement and each of which makes an angle of 30° with the displacement. 404 cm and 478 cm 404 cm each 383 cm and 415 cm 415 cm each
July 14, 2009

math...number sequence
i need help with this partter n 1,2,5,7,11 give me numbers that follow the parttern
June 29, 2009

Physical Science
?????????????
May 22, 2009

Calculus
Our teacher told us that the fourth partial sum approximates the sum of the sequence 7n/(n^3+1). The fourth partial sum is also the error of the sequence and our teacher asks us to find a number X such that the error is less than X.
May 11, 2009

Calculus
Find a number X such that the error is less than X (The error is 14593/2340 for the sequence, 7n/(n^3+1). How would you start to solve this problem?
May 11, 2009

Are you sure you wrote the question correctly? I do not understand how g which is a function of x is written as a function of t, and especially with the dt.
April 23, 2009

Physics
A gun that is spring-loaded shoots an object horizontally. The initial height of the gun is h=5 cm and the object lands 20 cm away. What is the gun's muzzle velocity? Do i use something like v=sqr(k)/m*x. am getting something like 3.2, is this somewhat correct at all.
April 14, 2009

Physics
A 32-u oxygen molecule (O2) moving in the +x direction at 580 m/s collides with an oxygen atom (mass 16 u) moving at 870 m/s at 27 degrees to the x axis. The particles stick together to form an ozone molecule. Find the velocity of the ozone. Express your answer in terms of the...
April 13, 2009

Physics
A 150g fircracker is thrown at 66km/h . It explodes in the air into two pieces, with a 42g piece continuing ahead at 93km/h.How much energy is gained in the explosion by the two pieces. I know you use k=1/2mv^2 though, do you use m1v1+m2v2=(m1+m2)vf I am getting something like...
April 13, 2009

1. Pages:
2. <<Prev
3. 1
4. 2
5. 3
6. 4
7. 5
8. 6
9. 7
10. 8
11. 9
12. Next>>