Thursday

January 19, 2017
Total # Posts: 1,968

**Science - Weather**

Describe what would happen to the temperature on Earth if the amount of energy reflected back to space a) increased to 80% b) decreased to 5%

*May 21, 2009*

**chemistry help**

can you tell me what to write

*May 20, 2009*

**chemistry help**

What mass of ammonium chloride can be added to 100 g of water at 20 degrees C before the solution becomes saturated?

*May 20, 2009*

**Question ! :)**

I was thinking of things like Myspace and how putting your personal information out there can put your life in jeopardy. Also, if you save something to a hard drive on a computer open to other people, then anyone can see your information and do whatever they want with it. I&#...

*May 19, 2009*

**Question ! :)**

Why is it important to use caution before putting any personal information on a computer? (example(s) required) I think everyone knows the general idea to the answer to this question but this is my final exam question...so it has to be thorough. Any specific ideas for an ...

*May 19, 2009*

**chemistry**

a polymer is a molecule with repeating units usually joined with covalent chemical bonds. 2 examples of naturally occurring polymers are proteins & starches.

*May 19, 2009*

**pre calc need help**

Find the indicated function value. Do not use a calculator. tan 180 degrees

*May 18, 2009*

**chemistry help asap**

explain how paper chromatography separates the components in a solution

*May 18, 2009*

**Math**

Please explain ... What percent of 60 is 72? 35 is what percent of 20? Thank you!

*May 17, 2009*

**physics**

I have a few questions that i am not too sure how to figure out... 1- as a racing car zooms by you, its pitch decreases by 20%. If the speed of sound is 345m/s, how fast is the car travelling? 2-a person has a threshold of hearing of 5db. another person has a threshold of ...

*May 17, 2009*

**12th grade- Trigonometry**

Find the exact value of each expression Cos^-1(0) Tan^-1 sqrt(3)/3 Sin^-1(1) Since the expressions are capitalized, I'm not sure if I have to do anything different. Any help is appreciated.

*May 14, 2009*

**Math**

Please explain how I write this into a decimal and as a fraction in simplest form: 94.6% Thanks!

*May 10, 2009*

**Maths**

What are like terms

*May 7, 2009*

**Maths**

What are lke terms in formula

*May 7, 2009*

**newletters ideas**

okay great

*April 28, 2009*

**newletters ideas**

for all more like

*April 28, 2009*

**newletters ideas**

what is a great newletter topic that I can do on about school or classroom?

*April 28, 2009*

**Math**

How do I figure out what is greater 67.5% or 135/200 ? Thanks!

*April 27, 2009*

**exponents**

I need help with a few problems... (4^3 x 5^-2)(5^4 x 4^-5)/ 4^-3 x 5^3 and (2^x+2) - (2^x+5) = -7 please help!:)

*April 5, 2009*

**physics**

what can be said about the speed of an object if the net work done on that object is zero?

*April 2, 2009*

**Math**

Use synthetic division to show that x is a solution of the third-degree polynomial equation, and use the result to factor the polynomial completely. List all the real zeros of the function. x^3 - 28x - 48 = 0 x=2 I have no idea how to start this problem!!

*April 1, 2009*

**Science - Biology**

Please can someone help me! I've got to do a biology experiment to Investigate the relationship between reaction temperature and the effectiveness of action of the enzyme amylase on starch. I really don't know what it is all about pls someone help :)

*March 29, 2009*

**Math:Evaluate Expression**

2.4?

*March 25, 2009*

**Math:Evaluate Expression**

I understand now. I think our messages were overlapping. Thank you!

*March 25, 2009*

**Math:Evaluate Expression**

So, 12 divided by 3, minus 6.4?

*March 25, 2009*

**Math:Evaluate Expression**

I'm not sure I understand.

*March 25, 2009*

**Math:Evaluate Expression**

k/3 - 6.4 for k=12 Thank you!

*March 25, 2009*

**Math:Evaluate Expressions**

7.8?

*March 25, 2009*

**Math:Evaluate Expressions**

e/3-2x3 for e=41.4 Please explain. Thank you!

*March 25, 2009*

**6th grade mah**

How do I simplify 28% of 64?

*March 24, 2009*

**english**

What are some verbal techniques?

*March 21, 2009*

**History**

How did life in the British North American colonies contribute to the creation of a unique American identity? What are some examples of this?

*March 18, 2009*

**English**

what are written techniques?

*March 17, 2009*

**British Lit**

What do we learn about Sir Gawain's character from his speech in line 343-365?

*March 14, 2009*

**Chem**

Describe the 6 changes of state that substances might undergo in terms of appearance and energy transfer.

*March 10, 2009*

**physics**

At what distance would the repulsive force between two electrons have a magnitude of 8.50 N? I have no idea how to do this problem... can someone help me please... 3x10^-4/8.50?

*March 9, 2009*

**Science**

if every single person on this planet (about 5x10^9) could eat 1 pizza every second, how many years would it take them to eat 1 mole of pizza. 1 mole= 6.02x10^23

*March 4, 2009*

**physics**

A solid aluminum ingot weighs 88.0 N in air.What is its volume?The ingot is suspended from a rope and totally immersed in water. What is the tension in the rope (the apparent weight of the ingot in water)? To find the volume would i do density/specific gravity of aluminum?

*March 1, 2009*

**language- swedish**

i really would like to learn swedish. if anyone could help me, id really be greatful and in return, i could help with english or german. thankyou!

*February 25, 2009*

**physics**

25cm is the other operator

*February 23, 2009*

**physics**

You are designing a hydraulic lift for an automobile garage. It will consist of two oil-filled cylindrical pipes of different diameters. A worker pushes down on a piston at one end, raising the car on a platform at the other end. To handle a full range of jobs, you must be ...

*February 23, 2009*

**Physics**

Suppose you viewed a movie that was running backwards. You would see lots of odd things happen: streams would flow uphill, a diver would emerge upwards and go back to the diving board etc. If these backward moving events actually happened in nature, which principle or ...

*February 20, 2009*

**Maths**

How do I work out how much is left of something after a percent has been taken. For example: $50 has 25% taken of it how much of the $50 is left?

*February 18, 2009*

**biology**

Why are coral reefs generally limited in distribution to shallow marine waters?

*February 15, 2009*

**Math**

Yes, 20/24. Makes sense. Thank you!

*February 12, 2009*

**Math**

please explain to me how to figure out what fraction is greater. ex. 5/6 __ 1/8

*February 12, 2009*

**math**

unscamble the word: ripem , phase , and clamidd into math words

*February 9, 2009*

**pre calc**

okay thanks

*February 9, 2009*

**pre calc**

yes to change it to y=mx+b form

*February 9, 2009*

**pre calc**

how do you put these in y=mx+b form 3x+5y=8 16-5x=2y

*February 9, 2009*

**english need help asap**

3. d 4.b

*February 9, 2009*

**english need help asap**

* 3. Which phrase from Song of Myself, Number 52 is a simile? Which phrase from Song of Myself, Number 52 is a simile? a. “He complains of my gab and my loitering.” b. “I shake my white locks at the runaway sun.” c. “If you want me again look ...

*February 9, 2009*

**english**

6. c

*February 9, 2009*

**english**

can you help with these 5. Free verse is best described as — Free verse is best described as — a. poetry written without regular rhyme schemes and meter b. words and expressions not meant to be taken literally c. clues that hint at what will happen later on in...

*February 9, 2009*

**english**

1. c 2.c

*February 9, 2009*

**algebra need help**

Evaluate each expression. 3x^2-2x+1 if x=5 3a^2b^3 if a=2, b=-3

*February 8, 2009*

**algebra**

1. a number increased by 21 is 28. find the number 2. a number decreased by 12 is equal to 30. find the number. 3. 8 less than a number is 15. fid the number

*February 7, 2009*

**science**

what substance do you use to grow a virus in a lab

*February 7, 2009*

**chemistry**

they are not i have no idea where to start.

*February 6, 2009*

**chemistry**

Balance the following equations? Fe2O3 + 3H2 → 2Fe + 3H2O 4NH3 + 5O2 → 4NO + 6H2O 2Al + 6HAsO3 → 3H2 + 2Al(AsO3)3

*February 6, 2009*

**stats**

How would r change if researchers had recordered the proportions?

*February 6, 2009*

**stats**

Often the percent of an animal species in the wild that survive to breed again is lower following a successful breeding season. This is part of nature‘s self- regulation, tending to keep population stable. A study of merlins (small falcons) in northern Sweden observed the...

*February 5, 2009*

**stats**

Often the percent of an animal species in the wild that survive to breed again is lower following a successful breeding season. This is part of nature‘s self- regulation, tending to keep population stable. A study of merlins (small falcons) in northern Sweden observed the...

*February 5, 2009*

**English**

Mark Twain's skill as a humorist shows in Chapter XI. He uses a play on words in this chapter. What is it?

*February 4, 2009*

**chemistry**

Solid silicon and solid magnesium chloride forms when silison tetrachloride gas reacts with magnesium metal. Write a word equations and an ublanced formula equation. Include all of the appropriate notations.

*February 4, 2009*

**algebra help**

x^2+6x+5/x^2+8x+15 for what values is # underfined.

*February 4, 2009*

**chemistry**

Solid silicon and solid magnesium chloride forms when silison tetrachloride gas reacts with magnesium metal. Write a word equations and an ublanced formula equation. Include all of the appropriate notations.

*February 4, 2009*

**chemistry**

Magnesium oxide forms from magnesium metal and oxygen gas. Write a word equation and an unblanced formula equation. Include all of the appropriate notations.

*February 3, 2009*

**chemistry**

What symbol is used in a chemical equation to indicate the phrase "reacts with "?

*February 3, 2009*

**chemistry**

it is product??

*February 3, 2009*

**chemistry**

symbol used in a chemical equation to indicate the phrase with react with?

*February 3, 2009*

**chemistry**

describe evidence that chemical reactions take place during a firework display

*February 3, 2009*

**chemistry**

describe evidence that chemical reactions take place during a firework display

*February 3, 2009*

**chemistry**

when propane gas C3H8, is burned with oxygen, the products are carbon dioxide and water. Write an unbalanced formula equation for the reaction.

*February 3, 2009*

**algebra**

so for what value is the number underfined?

*February 3, 2009*

**algebra**

Simplify 5x^7y^6/ 4y^6x^3 * 7x^3y^4/6x^2y^5

*February 3, 2009*

**algebra**

Simplify 5x^7y^6/ 4y^6x^3*7x^3y^4/6x^2y^5

*February 3, 2009*

**algebra**

Simplify x^2+6x+5/x^2+8x+15 for what valuesis the number underfined?

*February 3, 2009*

**Math**

0.48m 5213m

*January 28, 2009*

**Math**

48cm = ___m 458cm + 47m + 55cm = ____cm

*January 28, 2009*

**algebra**

factor 6x^6-15x^3+21x^2

*January 25, 2009*

**math**

Factor 6x^6-15x^3+21x^2

*January 25, 2009*

**math**

what does it equal -2

*January 25, 2009*

**math**

factor 8x^3+4x^5

*January 25, 2009*

**math**

put the square roots in lowest terms square root 20 and square root 150

*January 25, 2009*

**algebra**

Find the value of y in the equation y = log 2 32. a. 5 b.16 c.64 d. 1024

*January 23, 2009*

**Math**

I need help setting up this problem: Write the set of points from -7 to 1 but excluding -4 and 1 as a union of intervals.

*January 22, 2009*

**science**

Would water rinse off this dirt, since it is in oil? Why or why not?

*January 16, 2009*

**science**

how do you put the calculation on words?

*January 16, 2009*

**science**

What type of liquid is water? (polar or nonpolar) show your calculations.

*January 16, 2009*

**chemistry**

yes

*January 16, 2009*

**chemistry**

how do you no?

*January 16, 2009*

**chemistry**

What type of molecules can dissolve in polar liquids?

*January 16, 2009*

**science**

Most dirt on your body is nonpolar, and is trapped in oil residue on your skin. What type of liquid is oil? (polar or nonpolar) show your calculations. Would water rinse off this dirt, since it is in oil? Why or why not? Does soapy water rinse off this dirt? Soap: how does it ...

*January 16, 2009*

**chemistry**

What type of molecules can dissolve in polar liquids? What type of molecules can dissolve in nonpolar liquids? What type of liquid is water? (polar or nonpolar) show your calculations.

*January 16, 2009*

**english**

could you give me a summary of it?

*January 15, 2009*

**english**

Comment on Ben Smith's commentary on the "lipstick on a pig" commenting on the motives of Obama's surrogates joking that Palin's record can't be concealed with lipstick, and the motives of the Republican charge that Obama compared Palin to a pig. ...

*January 15, 2009*

**spanish**

That not what I mean i mean in terms of friendship.

*January 15, 2009*

**spanish**

What are some similarities and differences between who is considered a friend in a Spanish- speaking country and in the United States?

*January 15, 2009*