Sunday
August 30, 2015

Posts by jenna


Total # Posts: 560

Physics!!
An elevator's cable snaps and its emergency brakes start gripping at the secondary line in order to slow its descent. The elevator and passengers weigh 389 kgs together and fall under the influence of gravity (9.81 m/s2). The coefficient of friction between the brakes and ...
September 30, 2009

social studies,word unscrambler
the and thats your andsexfdjwfdk
September 28, 2009

algebra
3+1/7x +5x=453/7
September 28, 2009

Genetics
A flowering plant with orange petals is self-crossed to yield the following phenotypes: red flowers- 30 orange flowers- 62 yellow flowers- 33 Choose symbols and designate the genotypes of each of the above phenotypes. I am pretty sure that the above data suggests incomplete ...
September 23, 2009

Genetics
Two traits (stem length and seed color) are simultaneously examined in a cross of two pure-breeding pea plant varieties. A tall green plant is crossed with a dwarf yellow plant, and the resulting F1 plants are self-crossed. A total of 640 F2 progeny are phenotypically ...
September 23, 2009

Calculus
I'm having trouble with the following problem: Find the volume of the solid generated by revolving the region about the given line. The region is in the first quadrant bounded above by the line y= sqrt 2, below by the curve y=secxtanx, and on the left by the y-axis. Rotate...
September 22, 2009

math
How do you write (2x3)x5=30 without changing the number sequence?
September 21, 2009

Calculus
Thank you!
September 10, 2009

Calculus
Can someone look over my work and tell me if my steps look correct? I'm trying to correct some problems that looked wrong. Instructions: Find the total areas between the given curves. 1. x= (y^3) and x=(y^2) on the interval [0,1] (integral from 0 to 1 of) ((y^3)-(y^2))dy...
September 10, 2009

Calculus
I still keep getting 4. At this step: area= int (3-2y^2-y^2) dy = int (3(y^2-1) dy shouldn't it be int(3(1-y^2)? I did this: 3int(dy)-3int(y^2)dy= 3y- (3(y^3)/3) = 3y-(y^3) from 1 to -1... filling those in, I get 4. Am I still making a mistake?
September 10, 2009

Calculus
We're doing a lab in my Calc II class and I'm stuck on this question. I tried to do it by looking at instructions for a similar question in the book, but it made me more confused. Here is the question and my work: Find the area of the region enclosed by the lines and ...
September 10, 2009

science
How would you describe how tissues form your heart?
August 24, 2009

science
How would you describe a muscle cell?
August 24, 2009

Science
How would you describe a bone cell?
August 24, 2009

calculus
I am studying for a final exam and in our review packet we have this question, which I am having trouble with: lim (x-->0) ((e^x)+x)^(1/x) I tried this problem two ways. The first was with L'Hopitals rule... lim(x-->0) (1/x)((e^x)+x)^(1/x-1) * (e^x+1) but that doesn...
May 20, 2009

math
what is the function rule for input x 1,2,3,4,5,6 and output y 1,3,5,7,9,11 Thank you very much!
May 18, 2009

math
what is the function rule for input x 1,2,3,4,5 and output 3,2,0,-1,-2
May 18, 2009

math
I really need help. Please help. Solve for x: log(subscript)3(3x+1)-log(subscript)3(x-1)=2
May 17, 2009

Calculus
For the function f(x)=10-4(x^2), find a formula for the lower sum obtained by dividing the interval [0,1] into n equal subintervals. Then take the limit as n->infinity to calculate the area under the curve over [0,1]. I only need help with the first part. I don't really...
May 5, 2009

unit rate
how do u find the unit rate
April 14, 2009

Health
it can help by showing u unhealthy thingsand can prevent younger child from getting obbese by making the parents more aware of unhealthy foods idk im only in 6th grade
April 14, 2009

unit rate
ok im having trouble with unit rates i cant seem to get them can sum 1 help me or like giv an example to me so i can do the rest of my hw and understand it
April 14, 2009

unit rate
find the unit rate 175 calories in 12 ounces
April 14, 2009

unit rate
find the unit rate $920 for 40 hours
April 14, 2009

science
wen u stop beathing
April 14, 2009

college
What is the difference between Mahayana and Theravada Buddhism?
March 9, 2009

journal article about running
i need to find a peer reviewed journal article pertaining to my chosen behavior modification project, which is to start running regularly. the article should be at least 3 pages in length and must include empirical research.
February 26, 2009

year 8 art
thanks for your help but im sorry im still stuck i don`t understand how to start the story off. ive got to write about what i think is happening in the paintings ive looked on the sites everyone has been kind enough to find . its the mona lisa and the michaelangelo im ...
December 29, 2008

year 8 art
ive got the flu and i have loads of homework to do and i am strugging with this one for my art homework i have got 4 pictures of paintings. 1/Michaelangelo, creation of Adam, 2/ Botticelli, Birth of Venus , 3/ Mona Lisa , 4/ George and the Dragon. I need to tell a short story ...
December 29, 2008

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

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