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September 21, 2014

Posts by emma


Total # Posts: 1,165

equations and inequalities
find the value of x in the equation 2(x-3)+5=(2x+6)
July 26, 2009

algebra 1
Solve the equation: 14x + 3x - 40 = 11
July 11, 2009

Recycling speech
JUNK MAIL FACT: *If only 100,000 people stopped their junk, mail, we could save up to 150,000 trees annually. If a million people did this, we could save up to a million and a half trees. *The junk mail Americans receive in one day could produce enough energy to heat 250,000 ...
June 18, 2009

physics
ok, to calculate KE of a non-relativistic electron, we use the formula: K=.5mv^2=p^2/2m and K=h^2/(2m wavelength^2) do we use the same formula to calculate the KE of a non-relativistic proton?
May 28, 2009

Physics
thanks!
May 28, 2009

Physics
if light touching a surface has an intensity of about 1000W/m^2, how many numbers of photons per m^2 per sec does this show? wavelength of P=600nm
May 28, 2009

physics
so do you mean total E=KE+PE? i think i can use the r=r0A^(1/3) to find the radius of the nucleus, but i am still not sure what i should do with the E and wavelength. confused.
May 28, 2009

physics
one nucleus decays by emitting an alpha aprticle of KE x Mev. if such alpha particle goes directly toward another nucleus of the same atom, what is the distance of closest approach? i don't quite get this question.am i supposed to find r since r=r0A^(1/3)? but what is with...
May 28, 2009

4th grade
What is a person from the country known for koala bears and kangaroos called?
May 19, 2009

math
thanks everyone!
May 15, 2009

math
the answer would be(C)
May 15, 2009

math
A computer store sold a total of 300 items last month. The store sold six times as many hard drives as they did CD-ROM drives, and half as many floppy drives as hard drives. Based on this information, how many of each item were sold? A. 30 hard drives, 90 floppy drives, and ...
May 15, 2009

mathematics
A retail jeweler sells a pair of gold earrings for $213.90. The jeweler uses a 130% markup based on cost. Based on this information, what was the wholesale cost of the earrings? A. $93.00 C. $276.90 B. $164.53 D. $278.07 213.90 divided by 130%=164.53 B
May 14, 2009

math
A college professor has 370 papers to grade. In one evening, she grades 80 percent of them. How many ungraded papers will remain for her to complete tomorrow? A. 316 C. 82 B. 296 D. 74 I x'd 370 by 80% which equaled 296 then I subtracted 296 from 370 and came up with the ...
May 14, 2009

math
thanks
May 14, 2009

math
Add the fractions 2/3, 3/8, and 5/12 and reduce your answer to lowest terms. A. 10/24 C. 1 11/24 B. 25/24 D. 1 1/2 would you add 2/24, 3/24, and 5/24 which equals 10/24 but I don't understand the lowest terms.
May 14, 2009

math
In a restaurant, a man ordered soup for $3, an appetizer for $4.25, dinner for $17.90, a beverage for $1.50, and dessert for $3.75. He left the server a 15% tip. What was the total cost of the man’s meal, including the tip? A. $36.11 C. $30.40 B. $34.96 D. $4.56 my answer...
May 14, 2009

4th grade Vocabulary
How can I use transmitter in a sentence? P.S it has to be aboout hiking also
May 4, 2009

science
I don't understand how to answer USE OF DATA in science labs.
April 13, 2009

science vocabulary
What does "deviations" mean?
March 26, 2009

healthcare
I need some help inlistening two pros and two cons for a patient caregiver roles. 1.Mechanic and machines 2. Parents and children 3. Spirituals and believers. 4. Providers and consumers. 5. Partners. This for me to write my paper.
March 11, 2009

10th grade chemistry
A weather ballon with a 2 meter diameter at ambient temperature holds 525 grams of helium. What type of electronic probe could be used to determine the pressure inside the balloon?
March 8, 2009

Grade 8 science
What is an example of a non-living thing made up of cells?
March 5, 2009

college math
A camper has 3 jackets, 6 sleeping bags, and 14 different packages of food. An "outfit" consists of 1 jacket, 1 sleeping bag, and 7 packets of food. How many different outfits are there?
February 21, 2009

history
It would be B. The Federalists used it to silence the Jeffersonian Republicanists.
February 21, 2009

Science
what is the source of energy entering Earth's atmosphere?
January 22, 2009

Social Studies
What are 3 arguements Americans gave for expansion in the 1800s.
January 19, 2009

Science
Which of the following would most likely NOT be likely to produce a microclimate? a. an ocean shoreline b. a valley c. a flat prairie d. a large city
January 15, 2009

music
What pieces did Palestrina compose?
January 3, 2009

biology
If an atom of sulfur (atomic number 16) were allowed to react with atoms of hydrogen (atomic number 1), which of the molecules below would be formed? a.S-H b.H-S-H c.H-S-H | H d.H | H-S-H | H e.H=S=H
December 11, 2008

Biology
How many grams of the molecule in the figure above would be required to make 1 L of a 0.5 M solution of the molecule? H O | || (looks like C=O on the vertical) H-C-C-O-H | H a.29 b.30 c.60 d.150 e.342
December 11, 2008

6th grade art
The Dove of Peace by Pablo Picasso 30 x 24 inches . . . is that right? I also need to know where the art peice is located today and when it was made.
November 23, 2008

Physical Science
The one that is fastest has more power, and as for the work, it depends on the mass of each person and the height of the flight of stairs.
November 19, 2008

6th grade art
What was the Philosophies of Picasso.
November 16, 2008

math 5th grade
All I do is type in google or look in a library book
November 14, 2008

Math
Triangle PQR is a 30-60-90 triangle with right angle Q and segment PQ as the longer leg. Find the possible coordinates of R if (2,6) and Q(2,-6).
November 7, 2008

Math
Ray AF bisects angle DAB, Ray AE bisects angle DAF, and ray AD bisects angle CAF. Draw a picture that represents this situation. (I drew a picture but I still do not understand.) If the measure of angle DAB=x, find the measure of angle BAC. Answer choices: 3x over 4 , 6x, or ...
November 7, 2008

physics
How much does a 600 N spaceship weigh on the moon if the moon's gravity is 33% of Earth's?
October 22, 2008

science
the amount of matter in an object.
October 22, 2008

Biology
When milk is present, the lactose repressor binds to the lac operon. Is this true or false? I think it is false.....?
October 16, 2008

Math
This site is great
October 7, 2008

AP Chemistry
what does pv/nRT tell you?
October 2, 2008

8th grade home economics
make it all over again x
September 24, 2008

English
Sorry if it seems so sad , the ending is a LOT happier
September 21, 2008

English
This is just the opening
September 21, 2008

English
I wrote this 2 years ok - please could you critique it A tale of dishonesty Our story takes place in Zakinthos – a place in Greece- long ago. It is all about the Princess of that fine land. Her name was Maria and she was sick of palace life. She stayed there as her love...
September 21, 2008

7 grade math
I need help on this one question please help me
September 18, 2008

ict
ive looked on the sites everyone has kindly helped with the ict homework but i`m stuck on the definition of groups on the internet . thankyou so much
September 16, 2008

pre calculus
Yes,what do you do at that point? then you have the height as 4, but where does the 15 come in?
September 1, 2008

Science
If you eat more than 5 advils, what's the harm?
August 5, 2008

math
two puppies are chosen at random from a box at the mall. what is the probability of these outcomes 1)2;a tail then a head
May 26, 2008

math: percent and fractions
When writing a percent as a decimal,why do you move the decimal point 2places
April 6, 2008

math: percent and fractions
If 6eggs in 50% of an egg crate how many eggs are in the whole
April 6, 2008

math: percent and fractions
40% of jennies friends play kickball on weekends,what fraction of her friends don't play kickball
April 6, 2008

solar systems
if the earth rotated every 16 hours how would this affect solar eclipses, the phases of the moon and our tides
April 1, 2008

math
this is tha question a television series consits of 8 programes, each 3 over 4of an hour. how many 3hour tapes would be required to tape the series please tell me how you work it out
April 1, 2008

physical science
which one of the following frequencies of a wave in the air can be heard as an audible sound by the human ear? A.0.10Hz B 10 Hz C. 1,000 Hz D. 100,000Hz
March 25, 2008

science
who is the primminster of Canada
March 16, 2008

English
what rhetorical devices does david suzuki use in his opening sentence, and how does it begin to introduce his subject?
March 15, 2008

math
if you have x squared x and then a blank what is tha value of that blank x2+x+b what is b perfect square of a trinomial?
March 12, 2008

Chemistry
What is the Lewis structure for IF4-?
March 10, 2008

Math
xxxxxxxxx xxxxxxxxx xxxxxxxxx xxxxxxxxx xxxxxxxxx xxxxxxxxx xxxxxxxxx
February 11, 2008

Social Studies
What's the capital of Falkland?
January 15, 2008

math
Antonio said, "To solve 506-288, I can think of 5 hundreds as 50 tens." How might this help him subtract?
January 9, 2008

Physics (again, sorry)
A swimmer maintains a speed of 0.15 m/s relative to the water when swimming directly toward the opposite shore of a straight river with a current that flows at 0.75 m/s. (a) How far downstream is the swimmer carried in 1.5 minutes? (b) What is the velocity of the swimmer ...
November 29, 2007

Physics
Sorry I wasted your time! I understand it now!
November 29, 2007

Physics
A small plane takes off with a constant speed of 130 km/h at an angle of 37 degrees. In 3.00 s, how high is the plane and what horizontal distance has it traveled from the lift-off point. I know I should convert 130km/h into meters per second, but after that I am stuck. Can ...
November 29, 2007

history
Research it then.
November 25, 2007

Grammar
This is a TV Show though
November 25, 2007

Grammar
How do you write tv shows? For example: Some high school students have known that they want to become doctors ever since they picked up their first toy stethoscope or watched their first episode of Grey's Anatomy. How do I write Grey's Anatomy? Italicize or quotes? ...
November 25, 2007

spelling
My teacher wanted me to tell the class what Honolulu meant and Hawaii meant. I really had no idea want they ment, so when I got home I went on the computer to try to figure out the qestion. As I went on the computer I searched really hard but I could not find the answere! Of ...
November 18, 2007

math
The area of a rectangular field is 12,750 square yards. The width is 150 feet. What is the length of the field in yards.
November 6, 2007

math
19
October 31, 2007

Lunch
What should i take for lunch tomorro? i get hungry lots
October 29, 2007

science
Why do 6-ounce boxing gloves hit harder than with 16-ounce gloves?
October 21, 2007

science
why is a punch more foreful with a bare fist than with a boxing glove?
October 21, 2007

science
Which has the greater momentum when they move at the same speed- an automobile or a skateboard? Which requires the greatest stopping force?
October 21, 2007

science
If you throw an egg against a wall, the egg will break. But if you throw it at the same speed into a sagging sheer, it may not break. Why?
October 21, 2007

science
When rollerblading,why is a fall less harmful on a wooden floor than on a concrete floor that has less give?Explain in terms of impulse and momentum.
October 21, 2007

Algebra-please check my work
check my answers please. Use the Intermediate Value Theorem to determine whether the polynomial function has a real zero between the given integers. f(x) = 2x3 + 10x2 - 8x - 5; between 1 and 2 -I got: f(1)=1 and f(2)=35;no Determine the maximum possible number of turning ...
October 15, 2007

spainsh
i need to find spainsh words begining with all the letters of the spainsh alaphbet. i can't find any for k, x, z or w
October 9, 2007

Social Studies
need inside map of La Monte school r 5
September 20, 2007

Social Studies
need map of La Monte school
September 20, 2007

Physic
what type of materials do people use as ohmic conductors? thanks.
September 16, 2007

economics- opportunity cost
what does thinking at the margin help compare
September 10, 2007

Pysics Word Problem
4. An automobile is traveling at 30 km/hr. It accelerates at 3 m/s2 until it has covered 100 meters.. What is its new velocity? I asked my teacher on what formula I should use and said I should use this one: V^2= Vo^2+2ax (V^2 is the velocit, Vo is the initial velocity, a is ...
August 29, 2007

Physics Word Problem
4. An automobile is traveling at 30 km/hr. It accelerates at 3 m/s2 until it has covered 100 meters.. What is its new velocity? I asked my teacher on what formula I should use and said I should use this one: V^2= Vo^2+2ax (V^2 is the velocit, Vo is the initial velocity, a is ...
August 29, 2007

Physics
Could you please check my answers and units.Also, help me with 3 and 4, I dont quite understand them. Thanxs! 1. An automobile starts from rest and accelerates at 3m/s2 for 4 seconds. How fast is it going after acceleration? -I got 12 m/s 3. At time = 0 an automobile already ...
August 28, 2007

Physics
I am still not understanding. Like for number 3, this is as far as I got 30km/36000000. Then for number 4, would it be similar as to number 3? Also, did I get number 1 correct?
August 27, 2007

Physics
Could you please check my answers and units. Thanxs! 1. An automobile starts from rest and accelerates at 3m/s2 for 4 seconds. How fast is it going after acceleration? -I got 12 m/s 3. At time = 0 an automobile already traveling at 30 km/hr. accelerates at 3m/s2 for 2 seconds...
August 27, 2007

Science
I have some equations that I would like checked. Thanxs! 1. An automobile starts from rest and accelerates at 3m/s2 for 4 seconds. How fast is it going after acceleration? 3m/s^2 / 4 = .75 m/s 2. If an automobile travels at 30 km/hr. for 2 hours, how far does it go? d=(30 km/...
August 26, 2007

maths
how do i solve this equation? 2/(x+1)=1/(x-1) - (1/(2x-1)) thx Get a common denominator (x+1)(x-1)(2x-1) then, each term, multipy it out. Gather terms, solve.
July 12, 2007

maths
how do i solve this equation? 21(X-(1/7))^2= 3/7 thx Divide both sides by 21 Take the square root of both sides. Rewrite it as x - (1/7)= sqrt [(1/21)*(3/7)] = sqrt[(1/7)*(1/3)(1/7)] = (1/7) sqrt(1/3) x = (1/7)[1 + sqrt(1/3)] tahnks x=(2)/(7),0
July 12, 2007

maths
how do i factorise this?: p^2+2p+1-t^2 thx. p^2 + 2p + 1 - t^2 = (p+1)^2 - t^2 This is the difference of two squares, so it can be rewritten =(p+1+t)(p+1-t)
July 11, 2007

Maths
solve the following pair of simultaneous equation: (x/a)+(y/b)=1 (x/b)+(y/a)=1 can someone help please?i have no idea how to solve it =( x/(ab) + y/b^2 = 1/b x/(ab) + y/a^2 = 1/a Subtract one from the other y(1/b^2 - 1/a^2) = 1/b - 1/a y(1/b + 1/a)(1/b - 1/a) = (1/b - 1/a) ...
July 11, 2007

maths
each of the students in a class writes a dirrerent 2 digit number on the whiteboard. the teacher claims that no matter what the students write, there will be at least three numbers on the whiteboard whose digits have the same sum. what is the smallest number of students in the...
July 7, 2007

ACCOUNTING
#1 chin company incurred direct materials costs of $300,000 during the year. manufacturing overhead rate is 70%. how much are chin company total manufacturing costs for the year?
July 6, 2007

maths
five bales of hay are weighted two at a time in all possible combinations. the weights, in kilogrames, are: 110,12,113,114,115,116,117,118,120 and 121 what is the weight, in kilograms, of the heaviest bale? can someone please show me how to do this question?thx. Something is ...
July 6, 2007

physics
a gardener pushes a wheelbarrow. according to Newton's third law the barrow's reaction force on the gardener is the exact opposite of her force on the barrow. a bystander concludes the gardener and barrow will not move because they push equally against each other. how ...
June 29, 2007

physics
why are you more likely to have an accident on your bicycle if you are riding it on a gravel or wet pathway?how do i explain this using newton's law(s)? thanks consider newtons first law. Then, consider friction on the tire on gravel, wet vs dry pavement. isn't it ...
June 29, 2007

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