Wednesday
May 25, 2016

# Posts by selena

Total # Posts: 207

Algebra 2
To rationalize the denominator of 4/(2+√8), Brittany multiplied by (2-√8)/(2-√8) and Justin multiplied by (1-√2)/(1-√2). Explain why both are correct.
October 22, 2012

Well, one Kelvin is well below freezing and one Fahrenheit is a little below freezing, and one Celsius is a little above freezing, so one Kelvin must be the smallest measurement for temperature.
October 10, 2012

Chemistry
What is the temperature change in celsius when 29.5L of water absorbs 2.3 kwh of heat?
September 26, 2012

physics
What is its speed after 1.87 s if it accelerates uniformly at −4.31 m/s^2? Answer in units of m/s
September 3, 2012

physics
The initial speed of a body is 2.14 m/s. What is its speed after 1.87 s if it accelerates uniformly at 4.31 m/s^2? Answer in units of m/s
September 3, 2012

physics
A body moving with uniform acceleration has a velocity of 10.2 cm/s when its x coordinate is 3.73 cm.If its x coordinate 2.33 s later is −2.74 cm,what is the x-component of its acceleration?Answer in units of cm/s^2
September 3, 2012

physics
What is the average acceleration a between 14 s and 16 s?
September 3, 2012

physics
What is the average velocity v between 0 s and 6 s?
September 3, 2012

physics
A certain car is capable of accelerating at a rate of 0.57 m/s^2.How long does it take for this car to go from a speed of 56 mi/h to a speed of 66 mi/h? 1mi/h = 0.447 m/s.Answer in units of s
September 3, 2012

physics
A vehicle moves in a straight line with an acceleration of 5 km/h^2.By how much does the speed change each second?Answer in units of km/h
September 3, 2012

physics
Consider the expression 2π times square root of ℓ/g, where ℓ is length and g is gravitational acceleration in units of length divided by time squared.Evaluate its units.
September 3, 2012

physics
Consider the following set of equations, where s, s0 and r have units of length, t has units of time, v has units of velocity, g and a have units of acceleration. Take k to be dimensionless.Identify if these are dimensionally correct or incorrect. 1)v^2= 2as + kav 2)s = s0 + ...
September 2, 2012

chemistry
How does a straw work? Using the Kinetic Molecular Theory to explain?
May 31, 2012

Math
convert 628 kilometers to miles (round off ans to 2 decimal places)
May 27, 2012

social studies
what was the cause of the american revolution of 1776 the french revolution of 1789and the Russian revolution in 1917
May 18, 2012

physics
Amy needs 5.0 V for some integrated circuit experiments. She uses a 7.0 V battery and two resistors to make a voltage divider. One resistor is 360 . She decides to make the other resistor smaller. What value should it have?
April 2, 2012

english
the passage makes it clear that aunt georgiana??
March 18, 2012

physics
A metal rod is 40.125 cm long at 20 °C and 40.148 cm long at 35 °C. calculate the coefficient of linear expansion of the rod for this temperature range.
February 22, 2012

Trigonometry
Expressed in simplest form, (n-1/n)/(1+1/n) is equivalent to... 1.)n-1 2.)n+1 3.)n-1/n+1 4.)n
February 7, 2012

Earth Science
Can you help me find how many hours are received by these degrees of latitude during the winter (see details)? North Pole = 0 hrs of daylight Equator = 12 hrs of daylight South Pole = 24 hrs of daylight 66.5 degrees north = ? 23.5 degrees north = ? 23.5 degrees south = ? 66.5 ...
February 2, 2012

Chemistry
Could you please prove how the ice doesn't completely melt? Don't you subtract 280,000 J and 250,000 J and get 30,000 J? and then you divide it by 334 J/g and get 105 g? But I don't know what you do next.
January 29, 2012

Chemistry
An 850 gram chunk of ice at 0 degrees Celsius is dropped into a container holding 1.7 kg of water at an initial temperature of 35 degrees Celsius. Due to the presence of the ice, the temperature of the water eventually drops to 0 degrees Celsius. Show a mathematical solution ...
January 29, 2012

Math
Find the compound form of v, given the magnitude of ||v||=3 and v in the direction of 3i + 4j.
January 17, 2012

Math
Marshall knows that 0.01 is equal th 10 to the negative 2 how would he represent this using fractions?
January 11, 2012

Math
The coordinates of A and B are (7,-7) and (-2,2) respectively. If P and Q divide the line segment AB into 3 equal parts, find the coordinates of P and Q.
December 29, 2011

physics
A team of dogs drags a 112 jk sled 2.23 km over a horizontal surface at a constant speed. The coefficient of friction between the sled and the snow is 0.181. The acceleration of gravity is 9.8 m/s. Find the work done by the dogs
December 12, 2011

English
I am trying to understand my essay question, but need help putting it in simpler terms. Question: How does Selvadurai’s text encourage a critique of normative ideas about gender and/or sexuality?
November 14, 2011

English
what are some alliterations for wild that describes a tiger?
October 31, 2011

MATH 208
There were 18,017 AIDS deaths in 2003, or 34.5% of the 1995 AIDS deaths. Determine the number of AIDS deaths in 1995. What formula who I use to solve this problem?
June 23, 2011

math
jim's 10-foot garage casts a 7-foot shadow. his house has a 17.5-foot shawdow. how tall is his house
May 23, 2011

math
Math homework help????? please? heres what it says on the paper. Using proportions, you can calculate the dimensions of objects without having to measure them. solve the problems that follow... heres the problem ===================================== amy is 5 feet tall and ...
May 23, 2011

math
amy is 5 feet tall and casts a 4 foot shadow. the pine tree has an 8 foot shawdow. how tall is the pine tree
May 23, 2011

science
chemical reaction in cells that needs oxygen to release energy and produce carbon dioxide and water as waste 1)breathing 2)exhaling c)inhaling d)respiration
May 9, 2011

science
what is the condidtion of earths atmosphere at a particular time and place?
April 26, 2011

MATH
I IM LONE ABUOT MATH HI BY
April 9, 2011

Chemistry
Please help me with this question: Calculate the theoretical yield amount of CaCl2 that would be required to change the temp of 50ml of water from room temp 20degree to 45 degrees. Heat Capacity H20 is 4.184 Jg^-1deg^-1 and density is 1g/mL. I've already calculated: Q=mc ...
March 7, 2011

Chemistry
Please help me with this question: Calculate the theoretical yield amount of CaCl2 that would be required to change the temp of 50ml of water from room temp 20degree to 45 degrees. Heat Capacity H20 is 4.184 Jg^-1deg^-1 and density is 1g/mL. I've already calculated: Q=mc ...
March 7, 2011

SraJMcGin
Thanks a lot for your previous help with my assignments, and I have Windows. I don't know how to make accent marks:\
March 1, 2011

FRENCH
Comparez les deux dessins. Puis posez les questions suivantes a votre partenaire. Voire partenaire repond avec ne...jamais.., ne... plus, ne....personne ou ne...rien. Suivez le modele. There are pictures. One for 13h00 and one for 23h00. In the 13h00 one, there are students at...
February 28, 2011

FRENCH
I have a bit of information on Negative articles in french and stuff. Like I know there is Ne+ Pas Ne...Plus Ne...Rien Ne...Jamais Ne...Que Ne....Personne Ne Pas means: not, don't etc--a lot for this Ne plus means: not anymore, no more Ne Rien means: Nothing, anything Ne ...
February 28, 2011

FRENCH
Comparez les deux dessins. Puis posez les questions suivantes a votre partenaire. Voire partenaire repond avec ne...jamais.., ne... plus, ne....personne ou ne...rien. Suivez le modele. There are pictures. One for 13h00 and one for 23h00. In the 13h00 one, there are students at...
February 28, 2011

math
Is each ordered pair a slotuion of the given system? write yes or no. 1. y=6x+12 2x-y=4 (-4,-12)______
January 31, 2011

Social Studies
um...I'm not entirely sure I think the old world map, but thats all I know
December 21, 2010

Social Studies
Who was the first person to figure out the map? Who was the first American to figure out the map?
December 21, 2010

Chemistry
How do I separate a mixture of liquids?
November 24, 2010

math
I'm thinking of a number made from the digits 3,6 and 9. Each digit is used only once. My number is an even number. My number is greater than 400. What is my number?
October 26, 2010

What types of cells in your body are no longer undergoing mytosis?
October 26, 2010

Math
oh thank you!!
October 20, 2010

Math
A runner takes 20 seconds to run 100 meters. How long to run 25 meters? (Ex. 25/100 = 20/?)
October 20, 2010

Chemistry
Combustion analysis of 0.300 g of an unknown compound containing carbon, hydrogen, and oxygen produced 0.5213 g of CO2 and 0.2835 g of H2O. What is the empirical formula of the compound? C2H5O C3H8O2 C2H10O3 C2H5O2
September 19, 2010

geometry
how do you solve m<rst if m<rsp=(3x-2) and m<pst=(9x-26)?
July 28, 2010

to calculate volume you use the formula V= area of b.s.(base area) x h(height) - How can I tell what face is the "base shape", especially with a triangular prism?
May 15, 2010

math
April 29, 2010

math
So, 175/1 hour ?/7 hours you will have to multiply 175 by 7 to get the answer 175x7=1225 if you need more explanation, let me know!
April 29, 2010

Well first you have to combine the variables, So lets start with the variable (the c), Take the -14c and put it with the 4c on the left side,to do this, you will have to +14 onto the 4c, so the answer is 18c. Next you have to get the numbers without variables on the right side...
April 29, 2010

Lifeskills
Well, have fun with that! It should be a exciting time! And to your question, I have thought of a couple, see if you like.... 1. What is the best thing about your job? 2. What is the worst thing about your job? 3. What is your usual day like at work? 4. If you were to live ...
April 29, 2010

Lifeskills
Do you mean you are going to meet with one and you want to ask him about his job?
April 29, 2010

Math!!!!!!!!!!!!!!
What is 12.60 converted into a fraction?
April 28, 2010

hi there
March 10, 2010

Math
Thankyou that was spot on you totally helped me PEACE!!!
February 25, 2010

Math
What is 5% of 44 and 15% of 90???
February 25, 2010

history
what was teh assassination of the Ferdinand-?
January 27, 2010

technology
all can rember is that one of the stpes is to establish the problam, and form a hypothisis,
January 27, 2010

technology
what are the 7 basic steps to problem solving?
January 27, 2010

history
and what was the boxers rebillion? (these are all on ww1)
January 27, 2010

history
3) what was the Roosevelt Corollary?
January 27, 2010

social studies
what were the lines of defence dug into the earth? and what was willsons plan for peace?
January 27, 2010

social studies: what was the area between enemy trenches, in the ww1
January 27, 2010

Doesnt divide evenly.
January 20, 2010

science
what is gravitational potential energy and what is kinetic energy?
October 25, 2009

Math
Could someone show me how you would do the following question. Determine the roots algebraically by factoring: x^3 - 8x^2 - 3x + 90= 0
October 6, 2009

French
3.) Just like Mother Teresa, Barack Obama came from a family that taught him the importance of helping others. After college, he worked with a group of churches to help rebuild communities devastated by the closure of local steel plants. After attending law school, he led a ...
October 1, 2009

French
1.) What is a hero? To me, a hero is someone who fights for a cause, acts with self-sacrifice and works hard no matter what. Two people that I think would make the perfect hero are Mother Teresa and President Barack Obama. 1.) Quels est un héros? À moi, un h&...
October 1, 2009

French
Oh sorry, I'll try to re post the paragraph.
October 1, 2009

French
Hi there, Could you see if I have translated the English correctly into French, I was having a bit of trouble. Thanks. 1. What is a hero? To me, a hero is someone who fights for a cause, acts with self-sacrifice and works hard no matter what. Two people that I think would make...
October 1, 2009

French
Thank you so much. I just wanted to make sure, does (je voudrais être plus physiquement active en participant aux activités régulièrement.) make sense?
September 17, 2009

French
Hi there, Could you please help me by looking over these paragraphs and making sure my grammar is correct? 1.) La forme d’intelligence dominante c’est interpersonnelle. L’intelligence interpersonelle, c’est la capacité de comprendre les autres, de ...
September 17, 2009

math
daffynition decoder
September 17, 2009

Spanish Help?? (URGENT)
If someone said Soy Jannie Gooden as an answer then what would be the question that was asked.
September 12, 2009

Enviromental science
July 15, 2009

High School Math
Thank you Marth I understand that the mean you add all the numbers then divide by the how many #'s were added right. I understand all three of them but once again is the mode the one that is repeated more than once right.
July 14, 2009

High School Math
I'm reviewing for my final exam can anyone give me some tips on this I know what this means but I just to know someone eles opinion. Thanks Under what conditions might it be appropriate to use the mean? Median? Mode? When the median and mean are substantially different, ...
July 14, 2009

structures does not provide support for invertebrae bodies? C)Skin
May 22, 2009

math
33/48
April 2, 2009

lavre has sixty-one coins, all of whichare dimes and quaters. if the total value of the coins is \$9.85, how many of each kind of coins has she?
March 8, 2009

algebra 1
16x^2-121
March 1, 2009

math
December 7, 2008

science:)
An Earth's plate moves at the speed of 45mm/yr. How far will the plate move in 100years?
December 6, 2008

science
At exactly 2:00 pm, sophy the snail crawls onto a meter stick at the 10 cm mark. If he reaches the 65 cm mark at exactly 2:10 pm, what is her speed?
December 6, 2008

economics
Why or when is a ppf curve biased?
January 11, 2008

economic
What do opportunity cost have to do with slope?
January 11, 2008

fractions
i need help with fractions!!!!!!
August 22, 2007

biology
It becomes easier to identify through techniques such as karyotyping.
April 15, 2007

Math
What is a reciprocal? The reciprocal of x is 1/x; of 15 is 1/15.
February 6, 2007

Math
What is a reciprocal A number's "flip". Like if you have 2/3, it's reciprocal would be 3/2. If you have a whole number like 5, for example, than it is understood that there is a 1 under the 5. (5/1) This means that the reciprocal of 5 is 1/5.
February 6, 2007

bloom highschol
how do you write the equation of the line through (6,8) that is vertical
January 16, 2007

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