# Posts by Yan

Total # Posts: 47

**physcis**

Disk 1 (of inertia m) slides with speed 2.0 m/s across a low-friction surface and collides with disk 2 (of inertia 2m) originally at rest. Disk 1 is observed to turn from its original line of motion by an angle of 15 ∘, while disk 2 moves away from the impact at an angle...

**Math**

Yan water leaks from a hemispherical bowl of 8 cm diameter at the rate of 10 cm per hour .How fast is the surface falling when the water is 2 cm deep in the bowl

**college algebra**

Solve the following exponential equation by expressing each side as a power of the same base and then equating exponents. 31-x = 1/27

**math**

I really need to help with this

**physics**

If h is 5m and the mass takes 3 s to move the distance d when starting from rest, what is the distance d? PLEASEEEEEE!!!!

**french**

4 SAISONS -Le primptemps L'automne L'ete L'hiver You're welcome! ;)

**physics**

where's the picture? any how, F=uN brush weighs 15N , 15N=the normal force if the washer doesn't push down. If he/she did push down on the brush with a force F, it would be the cosine of the angle that is pushing down . so yeah draw a free body, and you'll see ...

**6th grade Algebra**

10^(#) = 1(#) 10 to the power of something is the same thing as writing out zeros (#) amount of times

**Algebra**

B. linear only if your wage/ money earned is the same for every hour you worked. the more hours you work, the more you earn

**maths**

row 15 = 32 seats every row after that has 5 more than the previous one. so 32+ 5 X (how many rows) = 92 seats 92-32=60 and 60 /5 = 12. so 15+12= 27th row

**physics**

at what distance would repulisve force between two electrons have a magnitude of 2.00 n between two protons ? 2=kq1q2/r^2 r^2 = 9.0 x10^9 x (1.6 x 10^-19)^2 So, what is the R, on my answer from, this is 1.07 x10^-14m, however, I cannot get this, can you show me how to get it ?

**physics**

a point charge of -4.00nc is the origin, and a second point charge of +6.00nc is on the x axis at x=0.800m. Find the magnitude and directin of the electric field at each of the following points on the x asix : a) x =20.0 cm b) x=1.20 m c) x = -20.0 cm

**College Algebra**

How did it become 800-4w from 2400-2w^2?

**physics**

yes

**Physics**

A ball is dropped from the top of a 49.0 -high cliff. At the same time, a carefully aimed stone is thrown straight up from the bottom of the cliff with a speed of 20.0 . The stone and ball collide part way up.

**Physics Mechanics (unsolved)**

integrate with lower bound is 7.1 E-10 and upper bound is infinity. Then use lim as Rmax approaches infinity, replace upper bound. Then find velocity by: Work = (1/2) * m * v^2 v^2 = 2 * Work / m v = sqrt( 2 * Work / m ). Answer for this problem: 843780

**Math**

A full bottle fo juice cost $2. If the juice cost $1.50 more than the cost of the bottle, how much does the empty bottle cost? (it is not 50c)

**None**

How is a circle like a human?Please do 3 reasons.

**Lang Arts**

Can you tell me four homonyms.

**4th grade math**

Thank you! :-)

**4th grade math**

1.) 99,412.55 2.) 44,499.77 How would you round the following to the nearest tenth? Would #1 be 99,412.60? Would #2 be 44,499.80? Please explain if I'm incorrect. Thank you in advance.

**spelling**

Thank you! :)

**spelling**

What is a chocolate sweet? (has a 'J' sound and 5 letters)

**spelling**

Thank you! (I'm in the 4th grade and I've never heard of the Cabbage Patch Kids)

**spelling**

What is a synonym for 'patch doll'? (has to have a 'J' sound and 7 letters) Thank you!

**math (3rd Grade)**

Thank you! (that was really fast)

**math (3rd Grade)**

Suppose the scale of a bar graph is 0, 4, 8, 12, 16, 20. Describe the bar graph that would represent the number 10.

**English**

Thanks!

**English**

Does this sentence have correct punctuation? "The ball hit me on the head!" exlaimed Airick.

**spelling**

Could you give me the synonyms & antonyms for face, door, cut, done, group, true, half, red, fish, and plants? Thanks.

**Social Studies**

What did Johnson want to accomplish in his Great Society Plan? Who did Jonson name to serve in the Supreme Court? How was Lyndon B. Johnson honored after he served our country? How did he show diligence in his life?

**3rd Grade Social Studies**

How did Franklin D. Roosevelt use Natural/land productive Resources? How did he use Human Resources?

**3rd Grade Poems**

Do all poems need to rhyme? If so, give me the examples> Thanks.

**3rd Grade Spelling**

Could you give me some suffixes for the following words: penny sky city country story dry carry lady copy (I already have es, ed, and ing)

**3rd Grade Poems**

Is there anything else I need to know about limericks?

**3rd Grade Poems**

I mean, isn't there more to it?

**3rd Grade Poems**

That's it?

**3rd Grade Poems**

What is a limerick?

**algebra**

What???

**SKILLS FOR THE EFFECTIVE TEACHER AIDE**

which of the following is an example of contructive criticism

**3rd Grade**

Thanks!

**3rd Grade**

Could you give me a website on how to write in cursive?

**French**

For negative sentences. Is it Elle n'aime pas les jupes or Elle n'aime pas des jupes? Is there a rule for using les/des for negatives?

**French**

What is the differences between Qu'aimes-tu and Qu'est-ce que aimes-tu?

**French**

When I want to say I love to eat ham, apple and sandwich, should I use J'aime manger le jambon or un jambon, la pomme or une pomme, et le sandwich or un sandwich?

**French**

I want to say it is 9:45, should I say il est neuf heures moins quart, or moins le quart. if i want to say 9:48 or something...is it natural to say neuf heures quarante-huit or dix heures moins douze?

**Math check**

Average cost = q^2¡V15q + 48 Calculate the output level (q), which minimizes a)Total Cost b)Marginal Cost I got an answer for a) is q=8 and b) is q=5 I need somebody to check it for me, thanks so much.

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