Friday
July 31, 2015

Posts by jenna


Total # Posts: 531

hcc
how do the masses iof electrons compare with the masses of protons?
October 29, 2008

grammar
I meant, is the date 1901 a proper noun?
September 23, 2008

grammar
Is the date "1901" a proper know?
September 23, 2008

Biology
Why does it make a difference if you measure metabolic rate in terms of O2/animal or O2/g?
September 3, 2008

Ethnic Diversity
Yeah im confused! lol i just needed some help for info. its 2 years later after yall got the help now im needing it ha
September 2, 2008

biology
why are animals shaped differently in cooler climates than in warmer ones?
August 21, 2008

Math
Can someone help me with this I am very confused When managing a business, it is important to take inventory of where your money is spent. You have a monthly budget of $5,000. Refer to the table below and answer the questions that follow. Round your answers to the nearest ...
June 29, 2008

Data management
A coin was tossed 1000 times in an experiment to decide whether it really had an equal chance of coming up heads or tails. The decision was made in advance to declare the coind NOT FAIR if the observed outcome of the experiment had less than a 5% chance of happening. Would the...
June 10, 2008

Data Management Help!
A coin was tossed 1000 times in an experiment to decide whether it really had an equal chance of coming up heads or tails. The decision was made in advance to declare the coind NOT FAIR if the observed outcome of the experiment had less than a 5% chance of happening. Would the...
June 7, 2008

Data Management, Math
Chebyshev's Theorem states that withing 2 standard deviations (regardless of the mean) that 95% of data is contained. There is also a theorem that states the minimum % of data that will lie between 2 standard deviations. Chebyshev's Theorem states that regardless of ...
June 7, 2008

statistics
mu=78 population std deviation=12 Normal Distribution n=16 alpha level=.05 * compute the power of the hypothesis test if the program has a 3-point effect. I came up with 83.88 % * compute the power of the hypothesis test if the program has a 6-point effect. I looked at the ...
June 3, 2008

math
The base is 25/16.
June 2, 2008

math
Wouldn't that be a decimal answer. Oh, and yes -3/2 is an exponent.
June 2, 2008

math
How would I simplify this problem using logs? (25/16) -3/2
June 2, 2008

Calculus
What is the volume of the region enclosed by the planes x+z = 3, y=x, y=0, z=0, and the cylinder x²+y²=1? Is the answer 5 because I keep on getting different answers for this?
May 30, 2008

Science and acrostic poems
jk...sorry i dont relly kno
May 27, 2008

Science and acrostic poems
BOO!
May 27, 2008

math
How do multiply mixed numbers and fractions
May 21, 2008

Probability. NEED HELP!!!
figure out how many cards are in a deck {52} then take the number of cards in a deck and compare it to the numbers of cards in a four of a kind {4}
May 21, 2008

Data Management, Math
Thank You Very Much!!! Very Much Appreciated!!!
May 13, 2008

Data Management, Math
10 of your friends (including you..so 10 altogether) are going to have a draw between all of you. Each person gives $10 (for a total of $100). There will be five, $20 draws. One per week for 5 weeks. For the first draw, every person gets a ticket. One ticket is picked from 10 ...
May 13, 2008

math
calculate (x-3)(x+2)
May 7, 2008

Science
Name and describe two ways in which magnetism is used in technology related to medicine? Im really not sure of the answer to this, but i do know that magnetism is the force of attraction or repulsion.
April 7, 2008

Geometry
wow, that was simple! thanks so much!
April 2, 2008

Geometry
What is a vertex? for example, there is a triangle with the point of it circled. the book asks if it's a vertex. i looked it up on google and dictionary, but i don't get it. thanks for any help!
April 2, 2008

science
What is the corrected radiocarbon age if the orginal radiocarbon age is 2100?
March 7, 2008

English
I'm a little confused about making something possessive. For example, if I were to write America's history is fascinating. would that be correct, or would "Americas", or "Americas'" be right? Also, suppose you wanted to say that a dog belonged ...
March 4, 2008

prefix and suffix
This is the worst website ever it won't listen to you and it's no help about prefixes
March 2, 2008

ict
i need to design a luggage tag for ict homework but i don`t know what is written on the tag. i know you put your name but else is needed. thanks for your help
February 29, 2008

United States
I need to know what the difference is between a commonwealth (Puerto Rico) and a territory (Guam) of the United States. If anyone could help, that would be great!
February 28, 2008

Math
Another way to do it would be 5.50 divided by 2 to find the price of one t-shirt, then that number times 5.
February 28, 2008

Physics
so it would be: (retarding force)(1020m)= (1/2)(8042N)(35 m/s) and the retarding force= 137.98?
February 25, 2008

Physics
Given: g=9.81 m/s square. The parachute on a race car that weighs 8042 N opens at the end of a quarter-mile run when the car is traveling 35 m/s. What net retarding force must be supplied by the parachute to stop the car in a distance of 1020 m? Answer in units of N. I have no...
February 25, 2008

Physical science
When you drop a 0.36 kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s^2 toward the earth's surface. According to Newton's third law, the apple must exert an equal but opposite force on Earth. If the mass of the earth 5.98x10^24 kg, what is the ...
February 17, 2008

math
i need help w/ math and parentheses here is the question: 5=3+4-2/1 and i have to add parentheses.
February 7, 2008

SCIENCE
yeah like how do they relate 2 science??
February 1, 2008

SCIENCE
science concept map!! test tubes matter oxygen please please please please HELP!!
February 1, 2008

Science
how do test tubes relate to science??
February 1, 2008

create a country
I am supposed to create my own country and I need to come up with a creative name for it. Any ideas?
December 18, 2007

Chemistry
why do some combinations of ionic compounds form a precipitation while others do not
December 2, 2007

Chem
Thank you.
November 26, 2007

Chem
Why does sodium in phenolphthalein change color?
November 26, 2007

science
what kind of consumer always follows a producer in a food chain?
November 18, 2007

DT
What are the three main properties of a Conker shell ?
November 7, 2007

Chem
you would use Calcium because its the limiting reactant? So... 40.078/131.015 = .305903 Then... 2.55g X .305903g Ca/1g = the theoretical yield?
October 8, 2007

Chem
Question: "Calculate the theoretical yield of calcium carbonate of you react 2.55g of calcium chloride dihydrate with an excess amount of sodium carbonate." I got the molar mass of calcium chloride dihydrate which is 131.015 g/mol, but Im not sure how to start the ...
October 8, 2007

Biology
is it water?
October 6, 2007

Biology
The most abundant molecule found in all types of cells is?
October 6, 2007

Math ... HELP!!!!!
Find the factors of 78 and 104,what is a factor that is the same number on each? That is the answer!:-)
October 4, 2007

Chemistry
so like if the ratio was 2:4 it would become 1:2?
October 3, 2007

Chemistry
ok so here's the question- For the compound Ge[S(CH2)4 CH3]4, determine: a) the ratio, by number, of C atoms to H atoms b) the ratio, by mass, of Ge to S I know this can't be THAT hard...but I'm really not sure on how to get the ratio. for a would I just add up the...
October 3, 2007

Gen. Chemistry
How do I "determine the mass percent of H2O in the hydrate Cr(NO3)3 * 9H2O to 3 significant figures"?
September 30, 2007

physics
A ball is thrown downward, with an initial speed of 8.09 m/s, from a height of 30.1 m. After what time interval does the ball strike the ground?
September 6, 2007

physics
A dog searching for a bone walks 2.87 m south, then runs 22.5 m at an angle 30.5 north of east, and finally walks 5.91 m west. Find the direction of the dog's resultant displacement vector. Give your answer as an angle in degrees, with the angle measured counterclockwise ...
September 6, 2007

physics
A dog searching for a bone walks 4.31 m south, then runs 8.93 m at an angle 22.0 north of east, and finally walks 10.0 m west. Find the magnitude of the dog's resultant displacement vector.
September 6, 2007

Literature
Thank you very much, Ms. Sue. Does this sound like a good opening line for my report? The Time Machine, by H.G. Wells,is an American literature classic relating the tale of a young scientist who travels through time with the help of his invention, the time machine.
August 23, 2007

Literature
But does the author write in this particular book what time frame the main character lived in?
August 23, 2007

Literature
I am writing report on the novel The Time Machine, by H.G. Wells. I am supposed to write when the story takes place. I have searched through the book and the internet and can't find any hints as to what time frame the young scientist lived in. Please help!
August 23, 2007

American History
I need help writing a biography on John D. Rockefeller. I don't know much about him, but every time I search under his name I come up with a really complicated, long biography. I just need some information that a sixth grader can understand. Thanks for any help! These ...
August 3, 2007

AP Chemisty
N2(g)+3F2 yields 2Nf3(g) Delta H(degree)298=-264KJ mol-1;Delta S(degree)298=-278J K-1 mol-1 The following questions relate to the synthesis reaction represented by the chemical equation above. a.)CAlculate the value of the standard free energy change, Delta G(degree)298, for ...
June 7, 2007

math
Tyrone has $60 and his sister has $135. Both get an allowance of $5 each week. Tyrone decides to save his entire allowance, but his sister spends all of hers each week plus an additional $10 each week. After how many weeks will they each have the same amount of money? Tyrone ...
June 2, 2007

History
In creative writing, I need to write a short historical biography by a fictional person. For example, a pioneer, or an Indian when the Pilgrims came. I have to write it from that person's point of view. I chose a soldier in General Grant's army, in April of 1863, about...
May 15, 2007

Computers
I am supposed to type out a report, but our Microsoft Office Word program is messed up somehow. I have the letters set to Times New Roman size 8... but they're HUGE!!!!!!!! So big I can only fit about 5 sentences on a page. Also, at the end of every line, there is a weird ...
May 11, 2007

Biology
Today I found 4 ticks on my dog's head, and tomorrow she is going to be pet-sitted by my grandma, who also has a dog. I don't want her to bring ticks into my grandma's house, but I don't know what to do! We brushed her really thoroughly and looked all over her...
May 2, 2007

ela
i dont know ask the driver
April 24, 2007

Nutrition Ed.
Which one of the major concepts is Not included in the conceptual framework on which nutrition education is based? 1. Nutrition is how the body uses food. 2. Food is composed of nutrients required for health. 3. All persons need a variety of nutrients throughout life. 4. ...
April 22, 2007

Biology
What is the difference between a stamen and an anther in a flower?? Check this site for a diagram and explanation. http://www.enchantedlearning.com/subjects/plants/printouts/floweranatomy.shtml
April 19, 2007

Art
I am studying the Middle Ages, and am supposed to whittle something. I have never whittled anything more than the point to the spear I made from a stick, and don't know what to whittle. Any ideas for a simple beginner's project? Thanks for any help. Thank you for using...
April 4, 2007

Biology
Can dogs eat cheese? Yes. http://dogs.about.com/od/dietandnutrition/f/pur_mmburger.htm
March 31, 2007

History
Why was slavery a paradox? I don't understand the word 'paradox' very well, even though I looked it up and it is defined as "a self-contradiction". Please help, I think the answer might have something to do with a quote I found: "Democratic liberty ...
March 29, 2007

science
What is all matter made up of? Are you searching for atoms, electrons and/or protons? I hope this helps. Thanks for asking.
March 28, 2007

HISTORY PLEASE HELP FAST
I need a fairly brief explanation of the Inquisition. All I know is that it has something to do with killing "heretics" whatever they are. Try typing it into Wikipedia. The first paragraph in the article should give you a brief explanation of the Inquisition. Of my ...
March 23, 2007

Art
I need a creative idea for a gift. My mom's birthday is coming up and she loves the beach, so I want to do something with sand so she can enjoy it wherever we are. I have the sand, but I need help fast because this craft has to be finished by Thursday!! Please help ...
March 20, 2007

macroeconomics
an increase in GDP necessarily translated into improvements into the welfare of citizens? true or false. i think its true but im not sure I can think of examples when it would not be true. Consider a kingdom which increases total output because the king tortures, cajoles, or ...
March 13, 2007

macroeconomics
should we care more about nominal GDP or real GDP?? Thank you for using the Jiskha Homework Help Forum. Here is a link that discusses that very question: http://economics.about.com/cs/macrohelp/a/nominal_vs_real.htm A GDP based on the prices that prevailed when the output was ...
March 13, 2007

Math please check
Does 0.21 * 0.05 = 0.0105? * means multiply. Yes.
March 7, 2007

More Math
There have been about two years before the birth of Christ for every 3 years of history in all. If 4,000 years passed before Christ's birth, what is the total number of years in history? (Years BC)/(Years AD + Years BC) = 2/3 4000 y = (2/3)(Years AD + Years BC) 6000 y = (...
March 7, 2007

Math
There are 39 books in the Old Testament an 27 books in the New Testament. Write a ratio in lowest terms to compare the number of books in the Old Testament to the number in the New Testament. I don't quite remember how to do ratios, could someone please help? A ratio is a ...
March 7, 2007

FAST MATH HELP!
I can't remember the abbreviation for decimeter! Abbreviation: dm thanks hey.... the abb is dm.. 1. Factor 4m²+40m+100 2. The area of a circle is given by the equation A = ð(25x²+10x+1). Find an expression for the radius. 3. The bed of a pond can be modelled ...
March 7, 2007

English
We are putting together a scrapbook for my older sister, and we came up with some dictionary definitions for parts of her name, but does anyone know of a meaning for "Valaitis"? Thanks for any help. Thank you for using the Jiskha Homework Help Forum. What a nice idea...
March 6, 2007

Health
My dog all of a sudden has a small bright red lump on her front left leg. I have no idea what it is, and I'm kind of worried. It might just be a scab or something, but I don't know. Does anyone know what it could be? Thank you for using the Jiskha Homework Help Forum. ...
March 4, 2007

poetry
I would say no, the mariner was not alone on his ship, because there was the wedding guest with him! I went to google and looked up the poem, read it, and it looks like he mostly says things like "The ship was cheered, the harbour cleared,Merrily did we drop" and &...
February 26, 2007

History Essay
This essay is on Benjamin Franklin, and I was wondering why he went to Philadelphia at only 17. Did he run away or did his parents send him away? Where did he stay and work while he was there? I've researched on Google, but I can't find any good information. Also, why ...
February 26, 2007

History Essay-english problem
In my opening sentence for my essay "Weaknesses of the Articles of Confederation" should I write "The Articles of Confederation were the first governing document of the United States of America." or should I write "The Articles of Confederation was the...
February 26, 2007

Science
Neptune's largest satellite is named (Triton) and revolves in a ( ) orbit. Could someone help me fill in the second blank? Please help! Nevermind, I got that question wrong (I'm homeschooled and my computer program grades me) and later found out that the correct answer...
February 25, 2007

Ratio queston
find the ratio of the first number to the second number and simplify: 36 to 88 would it be 9/22 ? yup! good job!
February 25, 2007

Fun Fact!
Benjamin Franklin complained, "Let the smaller Colonies give equal money and men, and then have an equal vote. But if they have an equal vote without bearing equal burthens, a confederation upon such iniquitous principles will never last long." Franklin was talking ...
February 25, 2007

History Essay
I have to write a report on the Articles of Confederation and some of the problems with them. I have done some research, but I still need more info. Could you help? Check these sites. http://bensguide.gpo.gov/9-12/documents/articles/index.html http://www.yale.edu/lawweb/avalon...
February 25, 2007

History again
Who invented the sewing machine? This site will give you a very interesting history of the sewing machine. http://inventors.about.com/od/sstartinventions/a/sewing_machine.htm Thank you!
February 24, 2007

not a question: DRBOB222 YOUR AWESOME!!
THANK YOU DR BOB YOU ARE SO AWESOME!!!
February 22, 2007

Morse Code Please Answer!
My book doesn't explain how, for example, if D was --. and O was .-. than how would they tell the end of the D from the beginning of the O? Did they pause between letters? But then how would they know the difference between a "new letter" pause, and a "new ...
February 22, 2007

Science
I am reading about partial solar eclipses, and my book has this warning: CAUTION:Looking directly at even a tiny sliver of the sun during a solar eclipse can damage your eyesight permanently. Why do they give this warning specifically for eclipses? Is the sun more harmful to ...
February 22, 2007

Science
I am reading about partial solar eclipses, and my book has this warning: CAUTION:Looking directly at even a tiny sliver of the sun during a solar eclipse can damage your eyesight permanently. Why do they give this warning specifically for eclipses? Is the sun more harmful to ...
February 21, 2007

Space Science
I can't seem to understand why lunar eclipses occur only twice a year and not monthly. I have looked up a lot of answers, but I don't understand. Thanks for the help.
February 18, 2007

Science
Could someone please explain to me in a simple way how FM, AM, and XM radio signals work? No one I ask seems to know. Thanks for the help. Radio waves are part of a general class of waves known as electromagnetic waves. In essence, they are electrical and magnetic energy which...
February 18, 2007

macroeconomics--help me!!!!!!
Karmin wants to clean her house, finish her economics problem set, write her English essay, and spend time with her boyfriend. However, she only has time to choose one of these activities.Karmin chooses to finish her economics problem set. Hence, the opportunity cost of ...
February 3, 2007

macroeconomics
Karmin wants to clean her house, finish her economics problem set, write her English essay, and spend time with her boyfriend. However, she only has time to choose one of these activities. Karmin chooses to finish her economics problem set. Hence, the opportunity cost of ...
February 3, 2007

science
i dont know thats why i asked it
January 31, 2007

algebra
-5+n+16=-3 -5+n+16=-3 n = -3 + 5 - 16 n = 2 - 16 n = -14
January 21, 2007

AP Chemistry
A precipitate is formed by adding 20.0 ml of 0.200M of sodium phosphate to 30.0 ml of 0.50M Copper sulfate. b.) what mass of solid will be formed? c.) Calculate the concentration of each ion in the solution after the precipitation is complete. See the other post. Balance the ...
January 5, 2007

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