Thursday
April 24, 2014

Posts by jessica


Total # Posts: 2,569

Physics
Please help me with these choose the best answers since I'm not sure of my answers. A current element produces a magnetic field in the region surrounding it. at any point in space, the magnetic field produced by this current element points in a direction that is a) radial ...

Physics
1)A wire is carrying a current, i, in the positive y-direction. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x direction. What is the d...

Physics
1)A wire is carrying a current, i, in the positive y-direction. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x direction. What is the d...

Physics
1)A wire is carrying a current, i, in the positive y-direction. The wire is located in a uniform magnetic field, B, oriented in such a way that the magnetic force on the wire is maximized. The magnetic force acting on the wire, FB, is in the negative x direction. What is the d...

Mathematics
Determine the quadratic equation whose solutions are: 3 and -2. Explain your solution

Mathematics
In 11 years, the age of Russel will be half of the square of the age he was 13 years ago. Find his present age. Explain your solution

Physics
Two long parallel wires separated by a distance, d, carry currents in opposite directions. If the left-hand wire carries a current i/2, and the right-hand wires carries a current i, determine where the magnetic field is zero.

math
a candy sells chocolate fudge for $4.50 for the first pound and $2.50 for each additional pound. how many pounds could be purchased with $29.00?

physics
At the airport, you pull a 18 kg suitcase across the floor with a strap that is at an angle of 41° above the horizontal. Find the normal force and the tension in the strap, given that the suitcase moves with constant speed and that the coefficient of kinetic friction betwe...

Chemistry Lab
Suppose for the reaction of Cu(NO3)2 + NaOH, you have not added enough sodium hydroxide to precipitate all the copper as copper hydroxide Cu(OH)2. a)How could you tell that not all the copper had precipitated? b)what effect would this have on the final yield?

Calculus
I get 2(sqrt3/2)(1-(3/4)1^(4/3)) But that's not the answer.

Calculus
Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis and whose cross-sections perpendicular to the y axis are equilateral triangles. I asked this same question for the y-axis around the x-axis (Thanks for the explanation) but I don...

Calculus
I don't see any error, but webwork just says y= , I can't enter anything besides what y is supposed to be. The slope I took was a method I found in my book but it only says that, how to take the slope, and I don't even know if I had that right. But I cant enter any...

Calculus
Webwork asks me to enter an answer for y=

PLEASE I really need help!!!
I dont know what to do for this problem.

Calculus
Find the equation (in terms of x and y) of the tangent line to the curve r=3sin3(theta) at theta=pi/4. I dont know if I'm taking the right approach for this question but her goes what I did: I found the slope I got (9(-1/2)(sqrt3/2)+3(sqrt3/2)(1/2))/(9(-1/2)(1/2)-3(sqrt3/2...

Calculus
Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis and whose cross-sections perpendicular to the y axis are equilateral triangles. I asked this same question for the y-axis around the x-axis (Thanks for the explanation) but I don...

Calculus
Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis and whose cross-sections perpendicular to the y axis are equilateral triangles. I asked this same question for the y-axis around the x-axis (Thanks for the explanation) but I don...

Calculus
Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis around the x-axis. What I did was: V=ç(0,1)pi(1-x^3)^2 dx v=pi(x^7/7-x^4/2+x) and I evaluated it for one since 0 is just going to be 0. and I got 9pi/14 The answer i...

Calculus
Find the volume of the solid obtained by rotating the region bounded by y=x^3, y=1, and the y-axis around the x-axis. What I did was: V=ç(0,1)pi(1-x^3)^2 dx v=pi(x^7/7-x^4/2+x) and I evaluated it for one since 0 is just going to be 0. and I got 9pi/14 The answer i...

English
I was wondering if you could help me revise this? Questions plague the mind of many readers of why exactly Tessie Hutchinson was stoned in Shirley Jackson’s, “The Lottery”. This gruesome tale tells of an innocent woman stoned in a small village of 300 people. In...

physics
Two blocks with mass m1 = 7.2 and m2 = 7.7 are connected by a massless string over a frictionless and massless pulley. The angle of the incline is equal to 45.0. The kinetic coefficient of friction between m1 and the incline is 0.22. What is the minimum value of the static fri...

English
I am writing this essay about Shirley Jackson's "The lottery" My essay is supposed to be about i think i want to talk about stoning in south africa( how long it lasted, if it still takes place, was it for punishment or for no reason) and the second body paragraph...

English Please help
i have an essay and ive been researching the topic like for freaking ever and i havent been able to fine anything "scholarly" through collins(my college's) libraries searching databases do you know any scholarly websites..?? Like literally ive been researching f...

healthcare
required annually pap smear: government is limiting those who have medicaid only to recevie the pap smear only every 3rd year but those you have private insurance it will cover it annually . what do you think opinions

Chemistry
I got 9.25527 for the pKa then for the Henderson-Hasselbalch equation: 9.00=9.25527+log(.600/acid) 10^(-.25527)=(.600/acid) .5556/.600M=acid acid=.925925...M molarity (.925925)*2.10L= 1.94 moles of NH4Cl 1.94 moles *53.4 grams=104.02g of NH4Cl

Chemistry
How many grams of dry NH4Cl need to be added to 2.10L of a 0.600M solution of ammonia,NH3 , to prepare a buffer solution that has a pH of 9.00? Kb for ammonia is 1.8x10^-5. I just wanted to make sure I dd this write, can you please check my work? Thank you!!!! I found the pKa ...

Geography
Graticules on small scale map represents ________ and ______. Graticules on large scale map represents ________ and ______.

physics
2. A tiger jumps horizontally off of a 1.7 meter tall rock with a velocity of 3.2. How far from the base of the rock does the tiger land?

english
Please tell me the anthropological perspective. Is the culture, the cross-disciplinary discipline etc? Thanks!

Biology
Using Darwin’s Theory of Evolution, describe how Eukaryotic cells could have developed from Prokaryotic cells. What advantages would the Eukaryotic cells have over the Prokaryotic?

chemistry
yes thank you the 1st one was considered strong :)

chemistry
a)H2SO4 b)CuS c)HF d)Zn(NO3)2 Which are strong, weak, or non electrolytes. I was think A was strong B and C were weak and D is non

Chemistry
Find the standard entropy (S^0) of ice at 25K. delta Hfus = 6009 J/mol and Cp of ice = 38 J/molK.

Algebra
The larger of two numbers is 23. if three times the number is 5 more than eight times the smaller, find the smaller number.

Physics
A motorist travelling at 107 km/hr is being chased by a police car at 133 km/hr. If the police car starts from 3.0 km back, how long does it take to catch the motorist? Leave time in hours

Mechanics
When a problem is statically indeterminate, what additional equations do you need to solve?

Physics
i dont get how to get rid of all the t's...

Physics
A hot air balloon is rising at a constant velocity of 13.3 m/s. When the balloon is at a height of 15 m, a heavy object is dropped overboard. IF air resistance on the object is neglected, how long does it take for it to reach the ground?

Physics
You are pulling your little sister on her sled across an icy (frictionless) surface. When you exert a constant horizontal force of 113 N, the sled has an acceleration of 1.3 m/s2 If the sled has a mass of 6.6 kg, what is the mass of your little sister?

Mechanics
What does a polar moment of inertia depend on?

Math
A triangle and trapezoid share a 15 inch base and a height of 10 inches. For what values of b is the area of the trapezoid less than twice the area of the triangle?

biology
what is activation energy?

math stats
you draw from a deck. if you get a red card you win nothing. if you get a spade you win $5. for any club you win $10 plus an extra $20 for the ace of clubs. A. create a probability model for the amount you win. B. Find the expected amount you will win. C. What would you be wil...

Statistics
A bag contains two blue, three purple, four yellow, two red, three green and one orange marbles. What is the conditional probability that, without replacement, the second marble is purple given that the first marble is green?

Statistics
A bag contains two blue, three purple, four yellow, two red, three green and one orange marbles. What is the conditional probability that, without replacement, the second marble is purple given that the first marble is green?

english writing
what does the word class means to you? Why or why not?

Chemistry
A mixture contains only CuCl2 and FeCl3. A 0.7391 g sample of the mixture is completely dissolved in water and treated with silver nitrate. if 86.91 mL of 0.1463 M silver nitrate soultion is needed to precipitate all the chloride as silver chloride, what is the weight percent ...

Chemistry
An aqueous solution with a density of 0.998 g/ml at 20 degrees Celsius is prepared by dissolving 12.8 mL of CH3CH2CH2OH (p=0.803 g/mL) in enough water to make 75.0 mL of solution calculate the percent (w/w), percent (w/v), parts per million, and molality?

Chemistry
The manufacture of ethanol (CH3CH2OH) yields diethyl ether ((C2H5)2O) as a by product. the complete combustion of a 1.005 g sample of the manufactured product yielded 1.963 g of carbon dioxide. what are the weight percents of ethanol and diethyl ether in the sample?

Chemistry
Aluminum metal and Iron(III) oxide react to give aluminum and iron metal. What is the maximum amount of Iron that can be obtained from a reaction mixture containing 2.5 grams of aluminum and 9.5 grams of Iron(III) oxide? What mass of excess reactant remains?

Chemistry
An aqueous solution with a density of 0.998 g/ml at 20 degrees Celsius is prepared by dissolving 12.8 mL of CH3CH2CH2OH (p=0.803 g/mL) in enough water to make 75.0 mL of solution calculate the molarity

History
The monroe doctrine was proclaimed in repose to revolution in____________. southern europe or latin america. I choose latin america

English
how to write a newspaper review?

english
Please tell me which of these two are Implicit statement and implicit premises or conclusions and please tell me the difference, I have quiz on this. Thanks! 1)Hilter rose to power because the Allies had crushed the German economy after workd war one. Therefore if the Allies h...

calculus
Find the slope of the curve at the indicated point. f(x)= abs(x) at a. x=2 b. x=-3 f(x)= abs(x-2) at a. x-1

history
i'm sorry it's suppose to be.... was the proposed capitol philadelphia

history
Before the change to a site on the potomac the was the proposed capitol philadelphia?

Math
The ratio of a rectangle is 3:4, its perimeter is 32in. What are the lengths of the sides?

trig
Find a cofunction with the same value as sin 19 degrees

help please
The pattern of learning that is strongest is called : A.learning modality B.intelligence activity C.learning style D.both a&c I got c what do you think?

help please
A is correct answer or not?

United States Government
Which of the following would NOT be advocated by modern conservatism? a. Free markets b. Small governments c. Laissez-faire economics d. Welfare programs e. Reliance on tradition I would say Reliance on tradition. what say?

Algebra II
I need to write a polynomial in SIMPLEST FORM having roots 2,-2 and 4. I have to gt rid of the parentheses by multiplying everything out.Did I do it correctly? Also, someone said yes yesterday , but I'm wondering if it is suppose to have anything else done to it-it seems ...

algebra II
I need to write a polynomial in SIMPLEST FORM having roots 2,-2 and 4. I have to gt rid of the parentheses by multiplying everything out.Did I do it correctly? Also, someone said yes, but I'm wondering if it suppose to have anything else done to it-it seems way too easy t...

chemistry
analyze and explain the buffer system in buffered aspirin(carboxyic acid)

Algebra II
I need to write a polynomial in SIMPLEST FORM having roots 2,-2 and 4. I have to gt rid of the parentheses by multiplying everything out.Did I do it correctly? Also, someone said yes, but I'm wondering if it suppose to have anything else done to it-it seems way too easy th...

Algebra II-Please recheck
Is that in simplest form or am I suppose to do something else with it? It seems too easy-

Algebra II
the first step should be x^2+2x-2x-4 = x^2-4(I forgot to put the (-4)

Algebra II
I need to write a polynomial in SIMPLEST FORM having roots 2,-2 and 4. I have to gt rid of the parentheses by multiplying everything out.Did I do it correctly? (x-2)(x+2)(x-4)original problem 1.x^2 + 2x-2x=x^2-4) 2. (x^2-4)(x-4) 3. x^3-4x^2-4x+16=0

government
first result was this page XD

government
Do voter ID laws conflict with anything in the Constitution besides, situationally, the 24th Amendment?

math
15 1/36 - 1 1/9+3 1/3

english
Hi, I need help finding these 3 questions please: I couldnt find them, thanks!!(1) what are the ethical concerns of embryonic stem cell research? (2) what are the benefits of related to adult stem cell reseach? (3) who are the voices in our society who will decide on how the i...

Alg
.Write an algebraic expressoin for4 times the sum of q and p HELPPP PLZZZ :)

geometry
if n is a prime number than n +1 is not . True or false

geometry
if n is a prime number than n +1 is not . True or false

physics
A car is driven east for a distance of 41 km, then north for 21 km, and then in a direction 30° east of north for 25 km. Determine (a) the magnitude (in km) of the car's total displacement from its starting point and (b) the angle (from east) of the car's total dis...

PHYSICS
its going to be 58x10^2 or 5.8x10^3

Reading
All of the little things. Like where the story takes place, when the time frame is, what the characters look like.. etc.

English
What all should I include in my intro paragraph for a 5 paragraph essay? My topic is about how people take eyesight for granted.

English
winter and carnival need to be capitalized because it is the name of a specific carnival.

Chemistry
They are both the same thing?

Math linear functions
The line through (-10, 2) which is perpendicular to the line y=8x+9 has slope -1/8 and y-intercept __?

Math
An equation of the line through (6, -8) which is parallel to the line −8x−9y=6 is __?

Math
An equation of a line through (-10, -6) which is perpendicular to the line −5x+8y=−1 is __?

college math
given the bar graph below create a grouped frequency distribution. the graph is numbered up the side by twos to 22, along the bottom there are countries that go up to a number. united states up to 10 argentina up to 22 united kingdom up to just under the ten phillipines is jus...

History
Thanks so much Ms. Sue.This is what I have so far can you tell me what you think and if you have any more ideas that i can add to make it better would be great. The French and Indian War left Great Britain in much debt. To pay off war debt and cover the cost of administering t...

History
Was there a single event that caused the Revolutionary War and was that war avoidable?

physics
A traditional unit of length in Japan is the ken (1 ken = 1.97 m). What is the volume of a cylindrical water tank of height 7.17 kens and radius 6.21 kens in cubic kens

physics
it didnt work

physics
Earth has a mass of 5.98 × 1024 kg. The average mass of the atoms that make up Earth is 40 u. How many atoms are there in Earth?

physics
how am i suppose to know how much the mistaken tourist believe she needs?

physics
A tourist purchases a car in England and ships it home to the United States. The car sticker advertised that the car's fuel consumption was at the rate of 40 miles per gallon on the open road. The tourist does not realize that the U.K. gallon differs from the U.S. gallon: ...

physics
Gold, which has a density of 19.32 g/cm3, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) If a sample of gold with a mass of 8.464 g, is pressed into a leaf of 5.036 ìm thickness, what is the area (in m2) of the leaf? (b...

chem
because of the electrons they share

physics
A person on a diet might lose 1.5 kg per week. Express the mass loss rate in milligrams per second, as if the dieter could sense the second-by-second loss

geometry
@ Ms.Sue 6cm

geometry
a circle has a circumference of 6c. Find the diametermof the circle

geometry
rectangles length is 3 more than twice its width and has a perimeter of 30 centimeters find the dimensions

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