Questions Asked on
February 5, 2008

Chem
If a class of 30 chemistry students have 17 of the students who are female. What percentage of students is female?
asked by Lisa 
us history
discuss specific problems or injustices that were present in american life during the late 1800s and early 1900s? Explain how reforms proposed during the Progressive Era attempted to address these problems.
asked by mm 
Physics
A 40.0kg child is in a swing that is attached to ropes 2.00m long. Find the gravitational potential energy associated with the child relative to the child's lowest position under the following conditions: a) When the ropes are horizontal b) When the ropes
asked by Robert 
physics
what is the final temperature when a 3.0 kg gold bar at 99 degrees is dropped into a .22 kg of water at 25 degrees
asked by kelly 
chem
How many moles of ethylene glycol must be dissolved in 500 g of water (Kf = 1.86) to lower the freezing point to 5.00 0C?
asked by Mark 
statistics
A score that is 10 points below the mean corresponds to a zscore of z=2.00. What is the population standard deviation?
asked by Joan 
Economics
The peak of the business cycle occurs when?
asked by Yong 
math
Suppose you are going to roll a die 60 times and record the proportion of times that a 1 or 2 is showing, s. The sampling distribution of s should be centered about....?
asked by Belinda 
Science
What items can be measured in kiloliters, hectoliters, decaliters, liters, deciliters, centiliters, and millimeters??
asked by Sam 
physical science
A car with a mass of 1,200 kilograms is moving around a circular curve at a uniform velocity of 20 meters per second. The centripetal force on the car is 6,000 newtons. What is the radius of the curve? A. 80 meters B. 32 meters C. 16 meters D. 160 meters
asked by Anonymous 
algebra
determine which two represent perpendicular lines; y=6x3,y=1/6x+3, y=1/6+3, or y=1/6x3.
asked by dennis 
gbgfddfdf
which is biger 13/17 or 12/15
asked by tgf 
physics
A dip needle is a small magnet mounted on ahorizontal axis so that it can swivel up or down like a compass turned on it's side) where on earth will a dip needle point most nearly vertically? where will it point most nearly horizontally?
asked by tina 
chemistry
3.) One method used in the eighteen century to generate hydrogen was to pass steam through redhot steel tubes. The following reaction takes place: 3Fe(s)+4H20(g)>Fe3O4(s)+4H2(g) 1. What volume of hydrogen at STP can be produced by the reaction of 6.28
asked by mhaidar9108 
Chemistry
Given this equation: 2P2O5 + 6H2O > 4H3PO4. If you begin with 4.8 grams of p2o5 and 15.2 grams h20, what will be your limiting reactant. I got the answer to that and it is P2O5. (6.6 grams) and H2O was 55.2 grams. so the limiting reactant P2O5. Then the
asked by Franki 
Chem Need Help
I really need help with this question? You have a 12.01 g sample of carbon. The average mass of a carbon atoms is 1.994 x 1023 g. How many carbon atoms are in the sample? (round the number to 2 decimal places) (if you get a superscript, place a ^ before
asked by Lisa 
algebra 1
express the area of each triangle as a monomial. 10. height2n^2 base 5n^3 11. height 4ab^5 base 3a^4b
asked by Caroline 
us history
I need help on writing an dbq for us history
asked by mm 
science
The electric field intensity between two charged plates is 1.1*10^3 N/C. The plates are 0.070 m apart. What is the electric potential difference, in volts, between the plates?
asked by kailey 
physics
a.What electric potential difference exists across a 5.2 µF capacitor that has a charge of 2.1 103 C? how do i use uF and C into a formula to find answer?? b.An oil drop is negatively charged and weighs 8.5 1015 N. The drop is suspended in an electric
asked by kailey 
Science
When you boil an egg, the egg "white" changes from clear to white. The egg also becomes "hard boiled." What type of changes are occurring in the egg? A.Chemical B.Neither physical nor chemical C.Physical D.Physical and Chemical
asked by jika 
statistics
Which of the following numbers could not possibly be probabilities? justify your answer a)0.124 b)1 c)0.1142 d)0 e)2/7 f)6/5 g)2.8
asked by mary 
chemistry
Use the activity series of metals to write a balanced chemical equation for each singlereplacement reaction. Zn(s) + AgNO3 (aq) > NOTE: The three above is a subscript...it should be a small 3. Please explain how to figure out this problem, and provide a
asked by stacy 
Biology
Hi, I am studying energy movements in ecosystems. Could you help me with this question: What type of food would be consumed by a secondaryconsumer in the third trophic level of a food chain.
asked by Faye 
Chemistry
How would you approach a question like There are 6.02x 10 to the power of 23 atoms in one mol of atoms, how many atoms are there in 5.5 mol of atoms?
asked by Katrina 
physics
the north pole of a compass is attracted to the north magnetic pole of the earth, yet like poles reple. can you resolve this apparent dilemma?
asked by tina 
algebra
Onefifth of a flank is sawn off and threeeights of remaining piece is then thrown away.What fraction of original remains?
asked by sally 
Graphic Design
What results from a total lack of managed white space? Under what circumstance can it be desirable?
asked by Peter 
chem
delta T = Kf*molality Plug in 5.00 C for delta T, 1.86 for Kf and calculate molality. Then molality x kg solvent x molar mass = grams. You know molality, kg solvent, and molar mass. Calculate grams. molar mass? where did u got the molar mass from ?
asked by Mark 
Graphic DesignList
List five or more white spaces functions in Graphic Design?
asked by Peter 
bio
What does a skeltal muscle fiber look like? I looked in google, but it shows images of skeltal muscle.
asked by laura 
Graphic Design
Why is symmetry associated with passive design? Why is asymmetry associated with active design?
asked by Peter 
mathalgebra
How do i solve these problems: 1. 2(5y^3)^2+(3y^3)^3 2. Lemon juice is 10^2 times as acidic as tomato juice. Tomato juice is 10^3 times as acidic as egg whites. How many times as acidic is lemon juice as egg whites? Write as a monomial. 3. The seismic
asked by Jaylin 
economics
differences between capital economy and communist economies
asked by daisy 
math
The weights of extra large eggs have a normal distribution with a mean of one ounce and a standard deviation of 0.1 ounces. The probability that a dozen eggs weighs more than 13 ounces is closest to...?
asked by Hannah 
Language Arts
I need to write an essay about Elvis Presley. When I look online, these biographies are too long. Help!
asked by BinhAn 
social studies
What type of a social scientist would research "where does the most crime happen in the world"?
asked by as 
art
What are the "degrees removed from reality?"
asked by Melissa 
Math
Evaluate the following: 5lb/ft x 3ft
asked by Kim 
math
simple form 3 ¾ / 60,000= 41 ½ / 3 ¾ A computer can excute 36 instructions per microscecond. How many instructions can it execute in 4 min?
asked by Sonya 
Biology
Why would an Arctic ecosystem be more fragile than a southern forest ecosystem?
asked by Faye 
Algebra Quadratic Equations
I am trying to define the different appraoches to solving quadratic equations. My book says using quadratic formula, completing the sqaure and factoring. I thought completing the square would be by facotring? How are these two different?
asked by Marysvoice 
algebra
solve system by graphing 3x+y=6 and 3xy=0.
asked by dennis 
algebra II
how do I work a exponential and logarithmic function on a TI83?
asked by Jerry 
Algebra
The denominator of a fraction is 2 less than twice the numberator. If the numerator is decreased by 2 and the denominator is increased by 3, the resulting fraction simplifies to 1/3. Find the original fraction. Have no idea what to do.
asked by bb 
literacy/plurals
how do we normally make the plural form of a singular nounthat endi in f or fe~?
asked by aminah 
PreCal
What are bearings??
asked by Daisy M. 
Physical Science
Hello, I wanted toknow if I came to the correct solution for this problem. Thank You, 20 Cubic inches of a gas with an absolute pressure of 5 psi is compressed until its pressure reaches 10 psi. What is the new volume of the gas?(assume that there's no
asked by Mandi 
math!
WHAT IS THE ANSWER TO A LINE THROUGH (1,1) AND (2,3) please help! C:
asked by kristine 
algebra
solve for x 3x+4y=24
asked by tess 
social studies
how do i look up presidents
asked by rtr 
Bizzy  proofread
Bizzy, I have taken this paragraph and rewritten it to let you see what I meant by being less wordy and better organized. My study of Human Development will be useful in working with children. The course,Human Development 307I Childhood through
asked by GuruBlue 
biology
How could you determine the genotype of an individual through breeding?
asked by Anonymous 
Business Law
How does bankruptcy affect interest rates on loans? Credit cards?
asked by Alicia 
spanish
Can someone please check this for me? How long has it been since the following people have done the following things? Write the answers using the expression hacer + time. 1) Santi y Silvina: no estar casados / un año Your response: Hace un año que Santi
asked by Steven 
biology
(1)Mendel crossed purebreeding pea plants grown from round seeds with purple flowers with purebreeding plants grown from wrinkled seeds with white flowers. All the progeny were round seed, purple flowers. Explain this with a suitable genetic diagram. I
asked by Anonymous 
history
what is The transAtlantic slave trade and its most lasting consequence.
asked by robert 
economics/sports
What is the difference between a large market team and a small market team? What makes a team a large market team or a small market team?
asked by help 
Chem II
Ccalculate the molarity of the resulting solution when 125.0 ml of water is added to 350.0 ml of a 3.75 M solution of HCl
asked by Ken 
Biology...PLZ HELP
(1)Mendel crossed purebreeding pea plants grown from round seeds with purple flowers with purebreeding plants grown from wrinkled seeds with white flowers. All the progeny were round seed, purple flowers. Explain this with a suitable genetic diagram. I
asked by Anonymous 
ushistory
who were the bosses of the senate?
asked by mm 
us history
we..propose.."effective legislation to prevent industrail accidents ,occupational diseases,overwork,and unemployment...to fix minimum standards of health and safety in industry...and to provide a living wage throughout industry....." state 2 reforms that
asked by mm 
Spanish very confused.
do the following with correct forms of ser or estar Manuel Roberto! No ____1__ listo? Debemos __2____ en la fiests a las ocho. Roberto Es que todavia ___3____ buscando mi ropa. Manuel Ay, Roberto!Tu ____4____ un desastre! Roberto Por que no me ayundas a
asked by sam 
science
What are 3 types of chemical reactions
asked by Heather 
Economics
What is the percent of increase when CPI is 121 then the initial value of CPI was 110?
asked by Dee 
spanish
Can you check my essay and correct it please ? this is my first essay ever in spanish, my classmates has done it for 2 years but as i moved from denmark to england, i had to do spansish, so help me please. No llevé uniforme escolar en Dinamarca cuál me
asked by Mads. First spanish essay ever, please help me 
Physics
What is the resultant of two displacement vectors having the same direction? a. The resultant is the sum of the two displacements having the same direction as the original vectors. b. The resultant is the difference of the two displacements having the same
asked by Shenay 
Ancient Civilizations
Who were the Xiongnu and were did they live?
asked by Mackenzie 
MATH
ROUND 77.1
asked by ashley 
english
I need help writing a DBQ
asked by mm 
black history
who is aderemi kuku?
asked by ebony 
us history
i don't get what the task means when it says discuss problems or injustices that were present in american life...what does injustice mean ...can some one explain it
asked by mm 
us history/english
when told to include 5 documents how can i include do ..do i say according to document 1 .what can i say?
asked by mm 
calculusdifferential equation
Consider the differential equation: (du/dt)=u^2(t^3t) a) Find the general solution to the above differential equation. (Write the answer in a form such that its numerator is 1 and its integration constant is C). u=? b) Find the particular solution of the
asked by Jeff 
Science
What are some things children must learn but animals don't need to know?
asked by Rebekah 
Math  Geometric Vectors
The fractions (2/3), (4/6), (6/9), ... are all equivalent to the fraction (2/3). Explain how the concept of equivalent fractions is analogous to the concept of equivalent vectors. I completely lost, I don't know the answer or how to answer the question.
asked by Anonymous 
arithmetic
Write 0.125 as a fraction in simplest form
asked by Dominique 
Science calculations
An airplane must achieve a velocity of 71 m/s to takeoff. If the runway is 1000 m long, at what speed must the plane constantly accelerate? Can you show the formula for how you found the answer and explain how to do it.
asked by Gabby 
Chem II
Find the a) % solution, b) molality and c) mole fraction of the acid 16.0 M H2SO4 d = 1.634 g/ml for the solution
asked by Ken 
calculus
f(x)= {kx3 if x is less than or = to 1 {x^2+k if x is greater than 1 find k such that lim f(x) (x to 1) exists
asked by morgan 
algebra
(7x+3)+(4x^2+1/2x10) Simplify answer  14x^2+8x^213 over denominator of 2?
asked by becky 
For Bizzy  from GuruBlue
http://www.jiskha.com/display.cgi?id=1202238583 Just in case you missed this below ...
asked by Writeacher 
statistics
In the U.S. 42% of the population has type A blood. Consider taking a sample size 4. Let y denote the number of persons in the sample with type A blood. a)Pr(y=O) b)Pr(y=1) C)Pr(y=2)
asked by alice 
STATISTICS
The seeds of the garden pea are either yellow or green. A certain cross between pea plants produces progeny in the ratio 3 yellow:1 green. If four randomly chosen progeny of such a cross are examined, what is the probability that: a)3 are yellow and 1 is
asked by BETH 
dividing  monomials
(3)2  (7) HOW DO YOU DO THIS TYPE OF PROBLEM?
asked by DON 
precal
can anyone please explain to me how to simplify this exponential expression??I got no idea...THANKS A LOT! [(8x^6)/(y^6)]^2/3
asked by Kelly 
science
What can be measured in hectometers?? BTW about how old is everyone here? I cant answer most of the questions because their too hard.
asked by Sam 
french
i need 10 french slang terms. but they need to be 10 slang terms that teens use . =]
asked by Margie 
Math
It was 47F today. How many degrees above freezing is this? Number Sentence____________________ Answer____________
asked by Justin 
sra McGuin
Hi I hope you are feeling better I have 4 sentences. answer the questions positively using complete sentences. Present  preterite  I am so confused on this thank you  Te cepillaste los dientes despues de comer?  Se maquilla Julia antes de salir a
asked by sam 
AP Chemistry
Could you please review my work and see what i'm doing incorrectly? Thank you Given this information: CxHyOz (s) + O2 (g) > CO2 + H20 given: 2.165 g of the unknown hydrocarbon v = 1.868 L P = 130.2 kPa T = 65.0 degrees C g of H2O = 1.818 a)find g H in
asked by Jake 
History
What article in the constitution does it state Who has the power to settle disputes involving the United States?
asked by Spencer 
Chem II
What mass of PbI2 can be formed from 75.0 mL of 0.65 M NaI by adding excess Pb(NO3)2? Pb(NO3)2 + 2NaI > PbI + 2NaNO3
asked by Ken 
matter
i need information on my atom project, my atomic number is 73
asked by chrystal 
Math
How was it determined that a circle is 360 degrees and all angles of a triangle equal 180 degrees?
asked by Alex 
English
I am a coop student in a Grade 1 class have been preparing lessons have to develop a language lesson on Valentine's Day vocabulary and follow up with an activity I am being tested on this I just need a good idea once I have the idea the rest will follow
asked by Taunya 
Chemistry
Please explain the acitivty series of metals. How can i determine if one element displaces another?
asked by stacy 
algebra
(7x+3)+(4x^2+1/2x10)
asked by becky 
chemistry
A saturated solution of ammonium sulfate, (NH4)2SO4, in water at 30 0C contains 78.0 g (NH4)2SO4 per 100.0 g H2O. What is the molality of this solution?
asked by robert 
Accounting
Is a straighline amortization basis for trademarks required under U.S GAAP ? or is another method required ?
asked by Sarah 
Japanese
What is the Japanese translation of this sentance: "I think that that woman is Mary's Japanese teacher"
asked by Joe 
chemistry
Using calories, how much heat will 32 grams of water absorb when it is heated from 25 C to 80 C?
asked by chelsea 
statistics
In a population of exam scores, a score of x=88 corresponds to z=+2.00 and a score of x=79 corresponds to z=1.00. Find the mean and standard deviation for the population.
asked by Tegan 
algebra
How do I simplify (2b^3)^43(2b^4)3 ?
asked by Caroline 
physics
manet A has twice the magnetic field strength of magnet B (at equal distance ) and , at a certain distance,it pulls on magnet B with force of 50n. with how much force, then dose magnet B PULL ON MAGNET a?
asked by tina 
calculus  PLEASE HELP!
Iodine131 is used to treat hypothyroidism since it is preferentially absorbed by the thyroid and typically involves a total radiation dosage of 10,000,000 millirem. Iodine131 has a halflife of eight days. 1. Set up the appropriate integral to represent
asked by anonymous 
Social Studies
Did Bismarck form any tax LAWS that were not approved by the Reichstag?
asked by Alice 
Japanese
What is the Japanese translation of this sentance: "I think that that woman is Mary's Japanese teacher" Could the answer pleased me typed in English. My computer does not recognize Japanese font.
asked by Joe 
math
do i mypitly the radias by 2 to get the diameter
asked by Qazpo 
Maths
How many different numbers can be made using 4 numbers a b c and d and only + and  ?
asked by Alison 
Maths
I can't do the following problem. I am not sure what to do when you have an algerbraic power & have to multiple it by a real number? ((x^ny^(m+3))^2)/x^(n+2)y^3m)) * ((x^2y)/(x^(n5)*y^(53m))
asked by Brittany 
eCommerce
I'm finding it hard to find evidence that the growth of the internet has had a positive effect on businesses and organisations. Any advice would be greatly appreciated.
asked by Mathew 
Geography
I'm doing a Map of the Month, and i'm almost done. I just have to locate and lable 3 rivers. (Helmand River, Amu Darya River and Indus River). I'm having some difficulty trying to find a clear map that labes the at least one of the lakes, so if anyone had
asked by Dawn 
Accounts
A manufacturing Company produces 2 products – A and B. The following information is presented for both products: A B Selling Price per unit $18 $12 Variable Cost per unit $14 $6 Total Fixed Costs are $468,000. Compute: The contribution margin for each
asked by Amy 
math
what is it mean to "foil" in math
asked by kitty 
Math
Sketch the Graph of x^2=y^2=9
asked by Loubs 
English
What is a textual change?
asked by Kirsty 
math
In a large population of adults, the mean IQ is 112 with a standard deviation of 20. Suppose 200 adults are randomly selected for a market research campaign. The probability that the sample mean IQ is greater than 110 is...?
asked by Belinda 
biology
Compare and contrast the processes of photosynthesis; aerobic respiration; and the two types of fermentation. Give examples of organisms that make use of each of these processes.
asked by Jenn 
SOCIAL STUDIES
What is emotional development (in relation to growth of children)? And what are emerging skills?
asked by Pizzazz 
drbob222
Thank You!
asked by alan