Saturday
October 22, 2016

Posts by kendra

Total # Posts: 251

statistics
A group of six students all have different grades in statistics. The median mark in the group is 68. If two of the six students are selected at random, what is the probability that both have marks greater than 68?
November 7, 2011

earth
Some people have proposed building a giant elevator from Earth's surface to geosynchronous orbit. The top of the elevator would then have the same orbital distance and period as any satellite in geosynchronous orbit. Suppose you were to let go of an object at the top of ...
October 7, 2011

Physics
On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.3 times as far as he would have on earth, given the same initial velocities on both planets. The ball is launched at a speed of 40 m/s at an angle of 46° above the ...
September 19, 2011

Physics
On a spacecraft two engines fire for a time of 560 s. One gives the craft an acceleration in the x direction of ax = 5.10 m/s2, while the other produces an acceleration in the y direction of ay = 7.30 m/s2. At the end of the firing period, the craft has velocity components of ...
September 19, 2011

ENGLISH
Which sentence uses quotation marks correctly for a title?Select one of the options below as your answer:A. “Cinderella” is my niece's favorite movie of all time.B. I think I'm going to read "Moby Dick" when I finish reading my current book.C. I ...
August 30, 2011

math
x=5 y=2
August 30, 2011

algebra
16y+8z+40
August 30, 2011

ENGLISH
Identify the sentence that uses correct punctuation.Select one of the options below as your answer:A. “I am so sorry that you are not feeling well” said Mrs. Smith.B. “If we hurry, we won’t miss the bus,” urged Mom.C. Brian said “Please don’t...
August 30, 2011

ENGLISH
The phrase "She called it a day" is __________.Select one of the options below as your answer:A. a metaphorB. hyperboleC. an idiomD. personification
August 30, 2011

ENGLISH
Identify the sentence that uses a modifier in the correct form. Select one of the options below as your answer: A. My sister ran hurried down the walk to the bus stop. B. My sister ran hurriedly down the walk to the bus stop. C. We all hurried runningly down the walk to the ...
August 30, 2011

Chemistry
Okay so I'm doing doing significant figures in chem. And I was just wondering for problems like this: .000456 dm + .00524 m Do I have to actually convert stuff? And on the ones with exponents what do I do ? Ex: 3845.2 m cubed/ 25.2354 m
August 27, 2011

chemistry
A sample of gas has increased in temperature from 20° Celsius to 22° Celsius. Which of the following happens as the temperature of the gas goes up? A.The gas undergoes a phase change. B. The velocity of the gas particles decreases. C.The kinetic energy of the particles...
July 29, 2011

chemistry
Use the collision theory to explain how increasing the surface area of a solute will increase the rate of the dissolving process.
July 29, 2011

us history
What is the significance of Alexander Hamilton’s financial program? · How did Hamilton’s financial program play a role in the creation of a two-party political system?
July 28, 2011

chemistry
Explain how the addition of a solute affects the vapor pressure of the solvent.
July 14, 2011

chemistry
Assuming all volume measurements are made at the same temperature and pressure, how many liters of oxygen gas would it take to react completely with 7.25 liters of hydrogen gas? Show all of the steps taken to solve this problem. Unbalanced equation: H2 (g) + O2 (g) yields H2 O(g)
July 14, 2011

chemistry
The boiling point of a solution will ______ and the vapor pressure will _______ with a(n)_____ in the amount of dissolved solute.
July 14, 2011

US HISTORY
WHAT ARE EVENTS THAT INFLUENCED THE SECTIONAL CRISIS THAT LED TO CIVIL WAR?
July 11, 2011

US HISTORY
Why was there tension in slavery in the 1840's
July 11, 2011

us history
was their tension over slavery in the 1840's?
July 11, 2011

us history
was the growth of democracy just a coincidence or did it contribute to the market revolution? i am trying to us this as a timeline.
July 11, 2011

math
21.65625
June 27, 2011

Physics
.54mm & 1.2mm sorry
June 27, 2011

Physics
SI units
June 27, 2011

Physics
What hanging mass will stretch a 1.9-m-long, 0.54 - diameter steel wire by 1.2 ?
June 27, 2011

Chemistry
A buffer solution is prepared by dissolving 0.400 mol of CH3COOH and 0.200 mol of CH3COONa in 1.00 L of water. 1.00 mL of 10.0 M HCl is added to a 100 mL portion of this solution. What is the final pH of the resulting solution? Ka of CH3COOH = 1.8 x 10¯5
June 26, 2011

Algebra
If 10,000 is invested at 4.8% simple interest, how long will it take for the account balance to grow to 11,200.
June 1, 2011

English-lord of the flies
What do you think? Does girls who wear makeup sort of resemble Jack and his mask?
May 30, 2011

English-lord of the flies
Thank you Ms. Sue!
May 30, 2011

English-lord of the flies
Yes, well you see i cant think of a single thing that this book resembles in our present day world... hence why i posted the question. could you possibly give me a jump start?
May 30, 2011

English-lord of the flies
Give five present day examples of similar characteristics or situations present in the novel lord of the flies.
May 30, 2011

Algebra
The sum of two numbers is 68 and the difference is 10. What are the numbers?
April 26, 2011

Algebra
put the following into mx+b form. x+1/6y=1/2 I got either y=-x+1/12 y=-x+3 I don't know which one.
April 9, 2011

Me you me and you
March 29, 2011

Psychics
A freight car is moving freely along a railroad track at 7.0 m/s and collides with a tanker car that is at rest. After the collision, the two cars stick together and continue to move down the track. What is the magnitude of the final velocity of the cars if the freight car has...
March 17, 2011

math
two-fifths of the voters already prefer candidate x. if he took money from a political action committee to buy television time, a third of those who do not now prefer him would be convinced to vote for him. But he would los the support of a fifth of those who support him. If ...
March 17, 2011

Psychics
Bradley, working in his 23 C kitchen, is cooking himself a crepe in an iron skillet that has a circular bottom with a diameter of .30 m. How hot must the skillet be in order for Bradley to make a 710.3 m^2 crepe that just fills the bottom of the pan? (coefficient of expansion ...
March 1, 2011

Math
What is the name for a three demensional figure that has only one circular face
February 28, 2011

Physics
are you there?
February 24, 2011

Physics
yes because it is less dense!! how would i compare the buoyant force of a can of diet soda ...
February 24, 2011

Physics
A con of soda displaces 3.79 * 10^-4 m^3 of water when completely submerged. Each 0.018 kg can contains 3.54 * 10^-4 m^3. Compare the buoyant force on a can of diet soda of density 1001 kg/m^3 to the force on a can of regular soda of density 1060 kg/m^3. If many cans of diet ...
February 24, 2011

Math
Find the quotient of l 4/5 divided by l/3
February 14, 2011

Mathematics
If a pentagon is dialated which of the folloeing characteristics change? 1.side lenght 2.area 3.the coordinates i think tis 2 & 3 but not sure.
December 15, 2010

Mathematics
ugh sorry it looks rediculous. let me try again -x+1/3y=5
December 15, 2010

Mathematics
What is the slope of the line described by the equation 1 _____________________________-x+-y=5___ ________________________________3______ i hope someone understands this problem
December 15, 2010

how to find common factors and common multiples for prime factorization.
September 16, 2010

Inequalities
Shelby's test scores are 99, 91, and 85. If she must average at least 90 points to get an A in the class, what must she earn on the next test? Okay so this was my equation but it came out completely wrong. 99+91+85+x greater than or equal to 90 So what should the equation be?
September 9, 2010

Math
Okay, I just need the steps for simplifying this type of radical: 5 -- 3√2 thats all one problem. thanks!
September 8, 2010

Algebra Help
Okay, I just need the steps for simplifying this type of radical: 5 -- 3√2 thats all one problem. thanks!
September 8, 2010

Okay, I just need the steps for simplifying this type of radical: 5 -- 3√2 thats all one problem. thanks!
September 8, 2010

Chemistry
Which of the following statements is (are) true? A. The vapor pressure of CO2 is lower than the vapor pressure of water. B. Sea water has a lower vapor pressure than distilled water. C. The vapor pressure of 1 m NaCl is higher than the vapor pressure of 0.5 m KNO3, assuming ...
August 30, 2010

Algebra
Write the equation of the line that passes through the (-2,1) and is perpendicular to y=5. Okay, I don't understand how I can do this without a slope.
August 26, 2010

Algebra Help
Wait wouldn't that last part be y-1=1/2(x-5) because five is the midpoint of the x's
August 26, 2010

Algebra Help
Write the equation of a perpendicular bisector of the segment joining the points: (7,2) and (3,0). Okay, so I don't even know what a bisector is. Is there a formula for this or something? If some could someone tell me it. Or tell me the process.
August 26, 2010

Math
Well for you have to put in in y=mx+b form. So it would be y=2x. That means that your y intercept is zero. So then you would plot your first dot at 0,0. And then from there go up two and over one.
August 26, 2010

Algebra Help
It is estimated that each cigarette a person smokes shortens that person's life by the amount of time she or he took to smoke it plus ten minutes. Write an algebraic rule that determines the number of minutes (t) a person's life is shortened by smoking c cigarettes ...
August 25, 2010

Algebra
It is estimated that each cigarette a person smokes shortens that person's life by the amount of time she or he took to smoke it plus ten minutes. Write an algebraic rule that determines the number of minutes (t) a person's life is shortened by smoking c cigarettes per...
August 25, 2010

General Chemistry
PLEASE ANSWER VERY SOON I AM STUCK! Crystalline silicon has a cubic structure. The unit cell edge length is 543 pm. The density of the solid is 2.33 g/cm3. Calculate the number of Si atoms in one unit cell.
July 14, 2010

UncG
A 1300 kg sports car accelerates from rest to 90 km/h in 7.4 s. What is the average power delivered by the engine?
June 6, 2010

General Chemistry
Can you clarify do I get the moles of KCN by .14 grams of KCN/ 65.02 grams of KCN. How do I get the moles of KCN?
May 26, 2010

General Chemistry
When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN), is given off. Here is the equation: KCN(aq) + HCI(aq) -> KCI(aq) + HCN (g) In a sample of 0.140 grams of KCN is treated with an excess of HCI calculate the amount of HCN formed ...
May 26, 2010

Genera Chemistry
Nitric oxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas: 2NO(g) + O2(g) -> 2NO2(g) In one experiment 0.886 moles of NO is mixed with 0.503 moles of O2. Calculate which of the two reactants is the limiting reagent. Please show set up of ...
May 26, 2010

Genera Chemistry
Balance the following equations: a. C + O2 CO b. CO + O2 CO2 c. H2 + Br2 HBr d. K + H2O KOH + H2 e. Mg + O2 MgO please explain and show work.
May 24, 2010

General Chemistry
Nitric oxide (NO) reacts with oxygen gas to form nitrogen dioxide (NO2), a dark-brown gas: 2NO(g) + O2(g) -> 2NO2(g) In one experiment 0.886 moles of NO is mixed with 0.503 moles of O2. Calculate which of the two reactants is the limiting reagent. Please show set up of ...
May 24, 2010

General Chemistry
3.71 When potassium cyanide (KCN) reacts with acids, a deadly poisonous gas, hydrogen cyanide (HCN), is given off. Here is the equation: KCN(aq) + HCl(aq) -> KCl(aq) + HCN(g) If a sample of 0.140 grams of KCN is treated with an excess of HCl, calculate the amount of HCN ...
May 24, 2010

General Chemistry
Balance the following equations: a. C + O2 CO b. CO + O2 CO2 c. H2 + Br2 HBr d. K + H2O KOH + H2 e. Mg + O2 MgO please explain and show work.
May 24, 2010

General Chemistry
So do I multiply 6.022 x 10 23. By .00035
May 17, 2010

General Chemistry
Thank you I did the first part but I am still confused about how to do b. Is a mole a molecule then does the # of moles = .469/134. If so what do I do with the 1 mole 6.022x10 23. What does the proportion look like?
May 17, 2010

General Chemistry
Cinnamic alcohol is used mainly in perfurmery, particularly in soaps and cosmetics. Its molecular formula is C9H10O. a. Calculate the percent composition by masss of C, H, and O in cinnamic alcohol. b. How many molecules of cinnamic alchol, not acid ,are contained in a sample...
May 17, 2010

General Chemistry
Cinnamic alcohol is used mainly in perfurmery, particularly in soaps and cosmetics. Its molecular formula is C9H10O. a. Calculate the percent composition by masss of C, H, and O in cinnamic alcohol. b. How many molecules of cinnamic alchol, not acid ,are contained in a sample ...
May 17, 2010

General Chemistry
Calculate the number of C atoms, H atoms, and O atoms, in 1.50 grams of glucose (C6H1206). I do not understand how to calculate this. Please explain and post the correct answers.
May 17, 2010

General Chemistry
Jazz. Can you give show me how to solve for cinnamic alcohol and not acid?
May 17, 2010

General Chemistry
Cinnamic alcohol is used mainly in perfurmery, particularly in soaps and cosmetics. Its molecular formula is C9H10O. a. Calculate the percent composition by masss of C, H, and O in cinnamic alcohol. b. How many molecules of cinnamic alchol are contained in a sample of mass 0....
May 17, 2010

General Chemistry
Calculate the number of C atoms, H atoms, and O atoms, in 1.50 grams of glucose (C6H1206). Please explain and exact example of how to do this and what the correct answers are.
May 17, 2010

General Chemistry
If the molar mass and the moles of glucose is .000833. What do I do next? I don't have a scientific calculator with me now.
May 17, 2010

General Chemistry
Calculate the number of C atoms, H atoms, and O atoms, in 1.50 grams of glucose (C6H1206).
May 17, 2010

critical thinking
what is thinking
May 6, 2010

algebra
DON'T BELIEVE HIM! It's a loan arranger!
May 4, 2010

math
in order to achieve from aerobic exercise, one should maintain one's heart rate at a certain level. A fourty year old women with a reating heart beat of 80 beats per minue should keep her heart rate between 140 and 160 beats per minute while exercising. She checks her ...
March 18, 2010

Math
5.7x10^9 5.9x10^-8
March 6, 2010

chemistry
please explain why the gem-dimethyl groups appear as separate peaks in the proton NMR spectrum of isoborneol although they almost overlap in borneol
March 2, 2010

Chemistry
In the experiment Nitration of Methyl Benzoate why is it important to add the nitric acid-sulfuric acid mixture slowly over a 15 minute period?
February 23, 2010

Chemistry
why is it important to add the nitric acid-sulfuric acid mixture slowly over a 15 minute period?
February 23, 2010

s.s.
I'm am going to assume this is supposed to be answered from your book. Check your book first, and if you can't find it there, you could google it.
February 20, 2010

pre-Algebra
divide both sides by 5 to get x by itself
February 19, 2010

Statistics
sd=standard deviation
February 8, 2010

english
The number of active movie screens--that is, screens showing films or booked to do so--is higher now than at any time since World War II. You do this because you are defining active movie screens and showing the info is not necessary.
January 31, 2010

science
A Punnet square is a table that shows what traits two parents (or first generation species) have and the possible outcomes the offspring will have. You can tell the chances of getting certain genes are. I'm not quite sure how to make an example on here, but that's the ...
January 27, 2010

Elimination method
Try to get rid of the r first. Multiply the top row by -5 and the bottom row by 2. solve for s. Get rid of the s next, multiplying the top by 2 and the bottom by 5. solve for r. There should be a solution.
January 27, 2010

math
Sam received a \$290 discount loan to purchase a stereo. The loan was offered at 16% for 90 days. Find the interest in dollars and the proceeds for the following problem. The interest is \$12.60, \$11.60, or \$10.60 ? The proceeds are \$279.40, \$278.40, or \$277.40 ? Curtis ...
January 26, 2010

science
thigh bone-femur shin bones-tibia and fibula kneecap-patella
January 23, 2010

Pre-Algebra B
add all the numbers and divide by the number of leaves. *a stem is on the left of the line and stands as a digit in the 10s place. EX. 5/4 would be 54.
January 23, 2010

algebra
Try to get the x by itself, just like a=bx + c, where you would subtract c from both sides then divide both sides by b. since the coefficient for x on both are positive, you don't have to worry about the greater than/less than signs. so for the first, subtract 12 from both...
January 20, 2010

math
convert 12 2/3 to an improper fraction, then times it by 3/3 so the denominator is 9. convert 5 7/9 to an improper fraction. after getting the answer, convert back to a mixed number and reduce.
January 20, 2010

physics
The engine of a toy rocket supplies an average acceleration of 38.0 m/s/s to the rocket for an interval of 0.80 s. A.)If the toy roocket is launched vertically, how high does it rise in this interval? B.) How fast is the rocket moving at the end of 0.80 s? C.) What altitude ...
January 19, 2010

physics
Newton assumed that a gravitational force acts directly between Earth and the Moon. How does Einstein's view of the attractive force between the two bodies differ from Newton's view?
January 16, 2010

physics
According to Newton's version of Kepler's third law, how would the ratio T^2/r^3 change if the mass of the Sun were doubled?
January 16, 2010

physics
during space flight, astronauts often refer to forces as multiples of the force of gravity on earth's surface. what does a force of 5g mean to an astronaut?
January 16, 2010

word problem Math
A pollster interviewed 500 university seniors who owned credit cards. She reported that 240 had Goldcard, 290 had Supercard, and 270 had Thriftcard. Of those seniors, the report said that: 80 owned only a Goldcard and a Supercard, 70 owned only a Goldcard and a Thriftcard, 60 ...
August 10, 2009

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