Monday
September 22, 2014

Posts by sarah


Total # Posts: 3,885

maths
simplify p to the power 4 times p
June 5, 2011

Science
Suggest how scientists may have determined that the Milky Way and Andromeda galaxies are moving closer together.
June 4, 2011

Physics
1) find the initial speed of the bullet-block system 2) find the speed of the bullet
June 1, 2011

Physics
A bullet with mass 4.91 g is fired horizontally into a 1.981-kg block attached to a horizontal spring. The spring has a constant 6.25 102 N/m and reaches a maximum compression of 6.38 cm.
June 1, 2011

Math
Need help on figuring out the function rule for a set of numbers. x:y -3,0 -1,14 1,28 3,42
June 1, 2011

Chemsitry II
50.00 mL of 1.0 M HCl and 50.00 mL of 1.0 M NaOH are mixed. The temperature is observed to increase by 10.0 degrees C. How much energy (in J) was absorbed by the calorimeter? Assume a density of the reaction mixture of 1 g/mL. Specific heat of the solution is 5.00 J/g/degree C...
May 31, 2011

check
How do I right a check for 1,400 dollars?
May 30, 2011

Spanish
surrrrrrrrrreeeeeeeeeeee.........................................................?
May 29, 2011

physics
A skier starts from rest at the top of a frictionless incline of height 20.0 m, as shown in the figure. As the bottom of the incline, the skier encounters a horizontal surface where the coefficient of kinetic friction between skis and snow is 0.23. the skier's speed at the...
May 27, 2011

physics
Find the horizontal distance the skier travels before coming to rest if the incline also has a coefficient of kinetic friction equal to 0.23. (The incline makes an angle θ = 20.0° with the horizontal.)
May 27, 2011

physics
A 0.8 kg block is shot horizontally from a spring, as in the example above, and travels 0.545 m up a long a frictionless ramp before coming to rest and sliding back down. If the ramp makes an angle of 45.0° with respect to the horizontal, and the spring originally was ...
May 27, 2011

chemistry
What is the amount of potential energy gained by. 30 grams of Hg as it melts?
May 24, 2011

new tech
Analyze the chemical reactions that take place when a biological catalyst combines with a reactant (Subtracts) to form an unstable intermediate. I know this has been answered but can not find....was able to get the first part of questions but was stuck on this one,,,, have ...
May 24, 2011

Business Law
Mario Juliano agrees to paint George O' Shea's house for $1500 and to begin work on or before August 1. Juliano begins on August 4. Has she breached her contract?
May 23, 2011

Business Law
Majorie Long decides to sell her car. She tells Rupert Ames that it is a bargain at $4,780." Ames buys the car and later discovers that the motor is in poor condition and the radiator leaks. Does Ames have a legal claim against Long for fraud?
May 23, 2011

Business Law
It doesnt cleary state but I think they are referring to the company. Not sure though.
May 23, 2011

Business Law
A firm advertises that it is selling 2000 items of equipment for $230 each. Victoria Perkins orders the entire lot at the stated price, but delivery is refused. Does Perkins have a claim against the company?
May 23, 2011

Physics
A child exerts a tangential 43.5-N force on the rim of a disk-shaped merry-go-round with a radius of 2.41 m. If the merry-go-round starts at rest and acquires an angular speed of 0.086 rev/s in 3.54 s, what is its mass?
May 23, 2011

government
How did world war 1 help to bring abiut the russian revolution?
May 22, 2011

Physics
this equation isnt giving me the right answer :/
May 21, 2011

Physics
the only part i cant figure out is the max static friction force that acts on the block. please help show me how to find it Suppose a block with mass 2.00 kg is resting on a ramp. If the coefficient of static friction between the block and the ramp is 0.320, what maximum angle...
May 21, 2011

ipc
A skydiver jumps out of a hovering helicopter, so there is no forward velocity. Ignore wind resistance for this exercise. 1. What is the skydiver's acceleration? (2 points)
May 18, 2011

math
a) The sales representative here tells you they also have two floor plans available, but they only have 54 homes available. Write an equation that illustrates the situation. Use x and y to denote floor plan #1 and floor plan #2 respectively. X+Y=54 or Y=(54-x)with the ...
May 16, 2011

science
can someone please help me identify two websites and the view of each author on the validity of Darwiin's theory of evolution? i really can't find one :(
May 15, 2011

internet
can't i have a simple answer please???
May 15, 2011

internet
how can you decide if a webpage is authentic and not just the opinion of someone wishing to push a particular viewpoint? Please help me answer this homework question!!!
May 15, 2011

abou the internet
yes thank you ,but how would you know if a webpage is original and not just an opinion of someone wishing to push a partricular viewpoint
May 14, 2011

abou the internet
i need help with my homework that's why
May 14, 2011

abou the internet
im asking a question...
May 14, 2011

abou the internet
How can you decide if a webpage is authentic and not just the opinion of somenone wishing to push a particular viewpoint?
May 14, 2011

Computers
How can you decide if a webpage is authentic and not just the opinion of somenone wishing to push a particular viewpoint?
May 13, 2011

Chem II
2 NOCl(g) --> 2 NO(g) + Cl2(g) Let’s assume that at a given temperature the equilibrium constant is 2.25: Also, the equilibrium concentration of the NOCl is 0.04M. Determine the concentration of the NO and the Cl2 CLUE: the concentration of both of the products must be...
May 11, 2011

English 10
Thanks for your reply
May 10, 2011

English 10
I'm reading Huckleberry Finn for my 10th English class and I have a question. Twain, in The Adventures of Huckleberry Finn, takes a satirical look at a.society b.religion c. education d. all of the above I think it might all of them but then I think it should only be ...
May 10, 2011

Spanish 7th grade Please check
We are doing double verbs and leaving the second one infinitive form and also present participles with cantar becoming cantando-Could you please check these questions I need to answer? Thank you 1.¿Sabe tu padre hablar inglés? Sí, mi padre sabe espa&...
May 9, 2011

UCI Chemistry Webworks
SPARTAN: Using the bond lengths recorded in Table II determine bond order and the major resonance structures of the following: A. For CVOH, the C-C bonds are longer than the bond lengths found in . (Use i, ii, iv, etc. for your answer) B. For CVOH, the C-N bonds fall between ...
May 7, 2011

science
How can environmental factors determine a feature in a species?
May 6, 2011

science
what contains DNA? where is DNA found?
May 6, 2011

Government
How does the great compromise demonstrate the need for a balance of representation among the states?
May 4, 2011

Business Law
David Faria orally agress to sell his house in Cleveland, Ohio, to Marie Ellis for $95,000. Ellis immediately sells her house in Nevada, gives up her job, and moves her belongings to Cleveland. Faria refuses to sell Ellis the house. 1. Would this sale deal with what the law ...
May 4, 2011

science (force and motion)
explain how accceleration can be slowing down. Calculate the impact force of a 50 kg object travelling at 100km/hr? -> i was wondering if you can answer directly and not through hyperlinks... thank you
May 3, 2011

science (force and motion)
explain how accceleration can be slowing down. Calculate the impact force of a 50 kg object travelling at 100km/hr? -> i was wondering if you can answer directly and not through hyperlinks... thank you
May 3, 2011

science
How does mutation contribute to variation in a species? Evolution is the theory and natural selection is the process. Explain what this might mean. How can environmental factors determine a feature in a species?
May 3, 2011

physics
An electron (m0 = 9.11 10-31 kg) enters a uniform magnetic field B = 1.7 T, and moves perpendicular to the field lines with a speed v = 0.93c. What is the radius of curvature of its path?
May 1, 2011

Physics
Sorry i mean k=58 and the values i substitued into the eqn were C=58*(8.854*10^-12)*(3.5m*4.9m)/0.013m which gave me C=6.77*10^-7F
May 1, 2011

Physics
A capacitor has two overlapping plates of width 4.9 m and length 3.5 m separated by 1.3 cm. A dielectric of dielectric constant ê = 58.0 fills the space between the plates. If this capacitor is connected to a 35 V battery, how much energy is stored in the capacitor when ...
May 1, 2011

MTH/208
The population of the US is about 3.02 X 10^8, and the average American uses about 1.5x10^2 gallons of water per day. Could this lake supply the American population with water for 1 day?
May 1, 2011

Trig
171505.3
April 28, 2011

physics
a wheel turning with angular speed of 30 rps is brought to rest with constant acceleration. It turns 60 revolutions before it stops.
April 28, 2011

science
Hachure lines, or lines with teeth, describe _____. a) volcanos b) mountains c) depressions d) discontinuities
April 27, 2011

trig
What is the shortest possible length of a triangle side facing an angle of 20 degrees, if one of the other sides is 5? (answer should be a decimal number, correct within 0.001)
April 25, 2011

math
acrimewave
April 25, 2011

math
4(x) + pi(x)=60 how do i solve this?
April 25, 2011

math
A florist uses wire frames to support flower arrangements displayed at weddings. Each frame is constructed from a wire length 9ft long that is cut into six pieces. the vertical edges of the frame consist of four of the pieces of wire that are each 12 inches long. one of the ...
April 25, 2011

precalculus
What is the component form of vector v given a magnitude of 9 and an angle of theta= 90 degrees with positive x axis. sorry I'm writing this on my phone and I don't have the symbols for vector, theta, or degree.
April 21, 2011

Economics
In long-run equilibrium there will be no economic profit in a purely competitive static economy because: A) barriers to entry will prevent profit from arising B) there will be no uncertainty, no innovations, and no monopoly C) there will be no need for professional managers ...
April 21, 2011

HCS/490
okay thank you for clearing that up!!!! :)
April 20, 2011

HCS/490
so its not right for them to screen because even if you smoke, have a disease or are overweight then you can still do the job they should not base your preformance on you health conditions unless they get in the way of the job?
April 20, 2011

HCS/490
Do employers have the right to screen employees or potential employees to learn if they are smokers, have chronic disease, or are overweight? Why?
April 20, 2011

Math
The perimeter of rectangle P is 12 feet. The perimeter of rectangle Q is 18 feet. Both rectangles have the same area.Find the area and dimensoin of each rectangle.
April 20, 2011

American lIt project
Thanks:) I am looking. Are there any songs that actually have lyrics about times in the 50s?
April 19, 2011

American lIt project
Do you guys know of any songs or poems that have to do with America in the 1950s? Thanks
April 19, 2011

Business Law
Benner imports Inc, an automobile dealership, placed an advertisemet in the chicago sun times to sell a station wagon. The advertisement displayed a price that was $700 lower than the dealership had indicated in the advertising copy sent to the newspaper.  A customer ...
April 17, 2011

American Lit project help (Literature needed)
Thanks, but Im still not finding ones that I can read online. They all are just the cover or you have to buy them. Any other suggestions? Do you think there would be more inserts about food in the homes and gardens?
April 16, 2011

American Lit project help (Literature needed)
So for my amer lit class I am doing a project on American foods in the 1950s and I need a piece of literature to write my essay on. It has to be a short peice not a novel. I really wanted for my literature to be a magazine from the 1950s. Like better homes and garden cooking ...
April 16, 2011

biology
Photosynthetic electron transport, like cellular respiration electron transport, is a series of redox reactions. True False I think it is true.
April 15, 2011

More Solutions Chem
You have 315.00g of sodium hydroxide. How many liters of dangerous 12.0M sulfuric acid (H2SO4) can you neutralize with your supply? __NaOH(s) +__ H2SO4(aq) -> __Na2SO4 + __H2O(l) I know the answer is .43, but I don't know how to get there. Thanks!
April 15, 2011

Solutions Chem
7) You have a 2.5M solution of Silver Nitrate. It contains 450mL of solution. How many grams of silver would you be able to extract? Cu (s) + 2AgNO3 (aq) -> 2Ag (s) + Cu (NO3)2 (aq) I've gotten this much: M=mol/L 2.5=mol/.45 mol= 2.5*.45 mol=1.125 Silver Nitrate= (Ag=...
April 15, 2011

Math
My couch potato friend enjoys sitting in front of the TV and grabbing handfuls of 4 chocolates at random from his snack jar. Unbeknownst to him, I have replaced one of the 26 chocolates in his jar with a cashew. (He hates cashews with a passion.) How many possible outcomes ...
April 14, 2011

allied health part 2-21
which of the following statements about risk management is true? a. risk management is unique to the health care industry b. risk management is controlled and managed by hipaa regulations. c. risk management is concerned with reducing exposure to legal liability d. risk ...
April 13, 2011

allied health part2-19
of the following types of information, which one has the strictest rules regarding the release of informationg? a. substance abuse information b. mental illness information c. genetic information d. adoption information
April 13, 2011

allied health part 2-17
if an institutional review board is involved in a request for information, the information is likely sought by a a. health care facility b. researcher c. court d. substance abuse center
April 13, 2011

allied health part 2
which one of the following activities is considered part of health care operations? a. reviewing the competency of health care workers b. administering a stress test c.giving a patient her prescribed medication d.recording a patient's blodd pressure and temperature
April 13, 2011

DrBob222
You just answered my previous half-life question, and I was curious how to find the value of k. You said that k = 0.693/t1/2 , but how do you evaluate t sub1/2?
April 12, 2011

Half-Lifes
Great! But, so that I can understand it in the future, can you tell me what the value of k is a little more clearly? how do you do a subscript of 1/2?
April 12, 2011

Half-Lifes
How much of a 6gram sample of silver-105m would remain after 4 minutes? Half life=7.2 minutes
April 12, 2011

Chemistry
A 0.225g sample of a weak monoprotic acid requires 37.50 mL of 0.100 M NaOH solution to reach the equivalence point. What is the molar mass of the acid?
April 11, 2011

CHEMISTRY
HOW YOU PREPARE 30.0ML OF 0.800M HNO3 FROM A STOCK SOLUTION OF 4.OOM HNO3? WHAT SOLUTION IN ML OF THE 4.OOM HNO3 SOLUTION WILL YOU NEED?
April 10, 2011

Chemistry
Which of the following combinations will make a good buffer solution? 0.05 M H2CO3 + 0.05 M KHCO3 0.5 M HI + 0.5 M CsI 0.3 M NH4Cl 0.3 M NH4Cl + 0.1 M NH3 0.3 M NH4Cl + 0.1 M HCl thanks
April 10, 2011

physics
On a catapult, what determines how far a missile moves?
April 10, 2011

5th grade Math
Explain how you can find the product of 5 and 3/4.
April 7, 2011

algebra
Or rather, what would I do to find all the zeros for this equation?
April 7, 2011

algebra
p(x)=x^3+2x^2-3x+20 one of this functions zeros is -4 When using synthetic division to find all the zeros of a polynomial function, would you plug in 4 or -4 into the actual equation?
April 7, 2011

math
It's all a matter of knowing the basic distance and midpoint formulas. The distance between two points with coordinates (x1,y1) and (x2,y2) is given by d=the square root of (x2-x1)^2 + (y2-y1)^2 If a line segment has endpoints at (x1,y1) and (x2,y2) the the midpoint of ...
April 7, 2011

Math
14. Parks A survey of 300 parks showed the following. 15 had only camping. 20 had only hiking trails. 35 had only picnicking. 185 had camping. 140 had camping and hiking trails. 125 had camping and picnicking. 210 had hiking trails. Find the number of parks that a) had at ...
April 6, 2011

biology
thank you
April 6, 2011

biology
Explain how alignment of chromosomes on the meta phase plate differs in mitosis, meiosis I, and meiosis II. Why are these arrangements important? Can you tell me where zi can find this information? I don't see it in my text. Thank you
April 6, 2011

algebra
The question is: find f(x+h) for each and the function given is f(x)=x^3+x after you turn it into f(x+h)=(x+h)^3+(x+h) how do you multiply out the cube?
April 6, 2011

Chemistry
In this equilibrium H2(g) + I2(g) <-> 2 HI(g). What is happening on the molecular level? Like given the right energy when a H2 molecule hits a I2, is electron transfered and they just stick together? Or do they have to be in the right position? Who transfers (or is it ...
April 5, 2011

chemistry
Assuming a temperature of 37 C and 1 atm pressure, how many mol/min of CO2 is this?
April 4, 2011

chemistry
what mass of (NH4)SO4 is required to prepare 500 cm3 of M/4 solution?
April 4, 2011

chem
where does the 4.70 come from?
April 4, 2011

Titrations (chem)
In the titration of a 0.101 M sodium hydroxide solution, 19.02 mL of 0.130 M sulfuric acid solution was required to neutralize the sodium hydroxide in reactions that replace both hydrogen ions of the sulfuric acid. Calculate the number of milliliters of sodium hydroxide ...
April 3, 2011

science
which is the correct balanced equation for a given titration process, (a) or (b)? a) 6H+ + 2MnO4- + 3H2O2 -> 4O2 + 2Mn2+ + 6H2O b) 6H+ + 2MnO4- + 5H2O2 -> 5O2 + 2Mn2+ + 8H2O Process: Make a solution in a 100mL volumetric flask using 1g of NaBO3*4H2O, 20mL of 1M H2SO4, ...
March 30, 2011

chem
thank you so much. you're my hero =)
March 30, 2011

chem
which is the correct balanced equation for a given titration process, (a) or (b)? a) 6H+ + 2MnO4- + 3H2O2 -> 4O2 + 2Mn2+ + 6H2O b) 6H+ + 2MnO4- + 5H2O2 -> 5O2 + 2Mn2+ + 8H2O Process: Make a solution in a 100mL volumetric flask using 1g of NaBO3*4H2O, 20mL of 1m H2SO4, ...
March 30, 2011

chemistry
How would you make 250 ml of a .51M calcium hydroxide solution?
March 30, 2011

Math
I need this too
March 30, 2011

Chemistry
If you have constant volume of gas how can you determine the number of moles it has? what equation do you use if your not given the constant volume value?
March 29, 2011

physics
A volume Vi = 23.1 L of air at temperature T = 21 ¢XC is compressed at constant temperature to a volume Vf = 7.7 L. The relative humidity of the air before compression is R = 56.4 %. Saturated water vapour in air at this temperature has a vapour pressure vp = 2.5 kPa and ...
March 29, 2011

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