# Posts by lena

Total # Posts: 1,049

simple math
Thanks so much :)

simple math
How would I figure this out: 4^t = 8^t-1 Just by looking at it, I know that x = 3 but how would I figure this out mathematically?

simple math
Thank you :)

simple math
Like there are rules for multipling eponents with the same base, I was wondering if there were rules for addition. If I were to get some complicated like: 3^-2/3 + 3^5/8 ... it would take a longer time to solve.

simple math
is there any trick I can use to solve the question below without expanding: 2^3 + 2^4

Chemistry
what is the difference between hydration and hydrogenation reactions?

Physics
How is Snell's law being used in real life application?

physics
I did a lab on refraction through water and my index of refraction was way off and I don't understand why? I did the experiment just as I was told but my results were still way off.

Physics
Thanks :)

Physics
We were doing a refraction lab where you passed a lazer beam through a water in a semi-circular dish. I was wondering why we used a semi-circular shape?

Physics
Thanks so much :)

Physics
and i`m trying to find n2 right?

Physics
what do you mean by both indexes of refection? I put a lazer beam through water.

Physics
How do I find index of refraction if I have the incident angle and refraction angle?

English
Does this line make sense: something good comes of everything

English
Thank you :)

English
What do people mean when they say love is blind?

English
So I would say she was the complement?

English
Like I want to say she completed the family. She was the _________. I need a word for the blank.

English
I need a word that fits this description: something that completes somthing else.

English
Thanks so much :)

English
So I can only use he and she and stuff.

English
The essay is supposed to be about yourself in the perspective of someone you know. Is that narrative?

English
Can I use past tense in third-person narrative? Like being the first child of her family, she had the burden of ...

English
ok, thanks so so much :)

English
So I can't you 'is' when i`m referring to myself. like she is my hero.

English
But i`m talking about her. She's supposed to be my main character. In thrid-person narrative I thought you could you I to describe the narrator.

English
I need to write a thrid- person narrative about someone. I wrote the beginning and I was wondering if this was good enough to be a paragraph? Saying that she is my hero would be an understatement. She is so much more than that; she is the definition of inspiration, ambition, ...

English
Thanks so much :)

English
If there were one thing that I’ve ever wanted to achieve in my life, it would be to become at least half the person she is. So I wrote this sentance but a lot of people say not to end with is. How can I rephrase it. Or is using is at the end of the sentance ok?

English
Thanks Nicole and Ms. Sue :)

English
would it kind of be a run on sentance?

English
I wanted to join these two sentances together. She was so much more than that. She was like a mother. Could I write it like this: She was so much more than that; she was like a mother. Does that make sense?

Biology
How is sex (gender) determined in mammals? I was thinking that if the male gave over an X chromosome that the baby would for sure be a male because males have XY and if the male gave over an X then baby would for sure be a female because all females ar XY. Am I right? And ...

Chem
Thanks so much :)

Chem
Thanks so much :) Is there a special name for them?

Chem
What are those gases that are always bonded to eachother, like they always have the a 2 subscript in an equation?

CHEM
I don't understand how to find the formula of a hydrate. Here's one of the question. if you guide me through it I think I'll be able to do the rest of them. Thanks :) When 100g of ZnSO4xœH2O is heated, 43.86g of water is given off. Calculate the formula ...

Chem/Bio/Nutrition
Why is the experimental Cal/g value usually less than the Cal/g value calculated from the Information on the nutrition label?

Plants
Thankyou :)

Plants
Why is active transport necessay in the process of moving food molecules within a plant?

Thanks :)

I was asked the question, what are some principles of law that can be used in everyday life? I got the following: don't judge a book by it's cover innocent till proven guilty I can't think of anymore. Could someone help me please. I've tried google but it dosen...

Biology
What is the name of the type of bacteris that live in harsh environments? is the answer, archaebacteria?

Spanish Flu
Thanks :)

Spanish Flu
Any cures or anything that could help someone affected?

Biology/History
Where did the Spanish Flu start? Not geologically, but who or what did it start from? Since we called it an infulenza pandemic did it start from a bird? And once this flu was transmitted to a human how could another human catch the flu?

Ottoman
ok thanks Ms. Sue & Writeacher :)

Ottoman
So if you`re an Ottoman that would it be correct to say that you are a decendent of the founder Osman I?

Ottoman
What does it mean when someone says my grandfather was ottoman? Like what does it mean to be Ottomon?

Chem
OH Thanks so much :)

Chem
I had a question that said would butane sink to the floor or rise to the ceiling in air. I would say sink to the floor but I was googling this and several sites said it wouldn't completely sink and that it would float. Is this right? And if so how would I explain this? My ...

Chem, could someone cheak my work please.
Isn't the density the mass of butane/V ?

Chem, could someone cheak my work please.
I did this experiment where I filled a graduated cylinder with water. The I put a stopper on it and put it under water and removed the stopper. The with a modified lighter (that wouldn't release sparks) I added butane gas. I got the following results: mass of lighter = 15....

Air and Butane
Thanks

Air and Butane
If air was at STP and butane was released, would the butance sink or woulf ir rise to the ceiling? I know that the density of air at STP is 1.292g/L. How would I go about figuring this out?

math/chem
I need to find the mass of butane gas and I only know the following things (you cannot use the molar mass of butane): volume = 80 mL pressure = 98.23 KPa temp.= 298K So I found the number of mols and I got 0.003171814 mols. of butane. But I don't know what to do after this...

Chem
I did this experiment where I filled a graduated cylinder with water. The I put a stopper on it and put it under water and removed the stopper. The with a modified lighter (that wouldn't release sparks) I added butane gas. I got the following results: mass of lighter = 15....

Chem.
How do you know it was 6 L of oxygen? I don't understand :S

Chem.
2SO2(g) + O2(g) ---> 2SO3 It says that 12.0 L of sodium trioxide are produced at 100 degrees celcius. What volume of oxygen is produced? How would I go about doing this. I was going to use PV=nRT but I dunno the pressure so I can't find the moles. What do I do?

Science
For phylum I matched taxon containing closely related phyla or divisons. Is this correct? :S

Science
I'm doing a matching assignment and I'm stuck on the last 2. Could someone please help me? Kingdom Class (to be matched with) Taxon of closely related orders. Taxon containing closely realted classes. I really don't understand this at all :S I've tried google ...

Are you trying to solve for y? 12y-5y-2=0 12y-5y=0+2 7y=2 y= 2/7 Is this what you were asking for?

Math
3 1/15 - 3 11/30 Let's convert these into improper fractions: 46/15 - 101/30 Now we want a comman denominator: (46 x 2)/(15 x 2) - 101/30 92/30 - 101/30 Now we can subtract the top numbers and keep the denominator: -9/30 Now let's simply by dividing by 3: -3/10

Bio.
I don;t understand what a taxon is :S I looked at the wikipedia definition and I don;t understand it at all. Could someone please explain it to me a simple terms. Thanks.

Bio.
System of branching divisons that biologists use to place an organism into the appropriate taxon. What would the word be that fits that definition? Here are some possible words: binomial nomenclature classification system homologous structure kingdom natural selection I've...

Computer
Thank you :)

Computer

Bio
What digestive enzymes does the pancreas produce (pertaining to the digestive system only)? The only one I know is Pancreatic Amylase. Are there any more?

Bicarbonate
Thanks Sra :)

Bicarbonate
The stomach secetes bicarbonate into the small intestine. Does the stomach secrete the bicarbonte into the duodenum? And if so, what does the bicarbonate go through to get to the duodenum?

Biology
Thank you :)

Biology
where does the small intestine connect to the large intestine?

Biology
Thanks Dr Bob :D

Biology
What is pancreatic amylase. I seem to find every kind of amylase except pancreatic. I need a good, understandable definition. Thanks.

Biology
Thanks Ms. Sue but I still can't seem to find them.

Biology
I'm making a picture book and I need to draw the following, what would they look like? Pepsin Bile Trypsin What I'm asking is what do the following look like. Is it a solid or a liquid and what color. Thanks.

Chem.
Thanks so much Dr Bob You helped so much Thanks

Chem.
If the silver was forming on the copper couldn't I just tap it off and it would fall to the bottom of a test tube and then I could just filter it out of the copper nitrate?

Chem.
What if I did this. - add copper wire then wouldn't the silver crystals attach onto the copper - then the copper would oxidize and you're left with silver would that work?

Chem.
I need pure silver so just Ag on it's own.

Chem.
thanks

Chem.
How would someone extract silver from silver nitrate? *silver isn't soluable in water so I was thinking I wouldn't be able to do a single displacment reaction. I don't know how to go about this :S

Biology
Does the pharynx separate the esophogus from the trachea? What's the purpose of the pharynx? If the epiglottis blocks food from going down the trachea then whats the function of the pharynx?

comman sense
Is the throat the esophogus and the tranchea or is another name for the tranchea a throat. Whats the name for the esophus and the trachea. Like both together.

Chem.
but it would be very close to 7 though. right?

Chem.
ok thanks DrBob :)

Chem.
What if I used pH paper? If the pH read 7 would that necessarily mean that it is safe to drink?

Chem.
How would one cheak if the water they are drinking is clean?

7x+11y=-5

Microsoft Publisher
Thanks :)

Microsoft Publisher
I am using microsoft publisher 2007. I just installed it yesterday.I made a poster on Microsfot Publisher (1page) and when I printed it, the program divided my work onto 4 different pages. How do I fix this?

Math
Thanks :)

Math
Oops :O Thanks

Math
Did I do this right? The shorter leg of a 30°- 60°- 90° right triangle is 7.5 inches. How long is the longer leg and the hypotenuse? 1) The longer side: 7.5/Sin 60 =b/Sin 30 4.208723391 inches Hypotneuse: 8.6 inches

Law
Thanks so much :)

Law
What is peaceful assembly?

English
could you give me an example of the literary term Conflict!?

Law
Thanks :)

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