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Atomic Boo

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each statement is false. rewrite each one as a true statement (im crap at science)

 

 

green plants photosynthesise all day and all night in summer

 

photosynthesis takes place in the roots of a plant

 

roots hold a plant in the ground and absorb carbon dioxide for photosynthesis

 

oxygen combines with water to make food for a plant

 

to catch as much light as possible leaves are narrow and flat (broad + flat)

 

the reactants of photosynthesis are glucose and oxygen ( carbon dioxide + water)

 

green plants store carbohydrates in the form of glucose in the leaves

 

a green water plant will produce more bubbles of carbon dioxide if the light intensity increases

 

chopping down lots of trees will increase the greenhouse effect because the amount of nitrogen in the atmosphere is increased (carbon dioxide)

 

chloroplast is the green pigment that is found in leaves

 

 

 

brackets mean my thoughts of an obvious answer

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green plants photosynthesise all day and all night in summer

I think they do it at day but respire day and night

 

photosynthesis takes place in the roots of a plant

Leaves

 

roots hold a plant in the ground and absorb carbon dioxide for photosynthesis

Hold a plant, take water and nutrients

 

oxygen combines with water to make food for a plant

respiration = glucose + oxygen = water + carbon dioxide + energy

 

to catch as much light as possible leaves are narrow and flat (broad + flat)

Broad and flat

 

green plants store carbohydrates in the form of glucose in the leaves

starch isn't it?

 

chloroplast is the green pigment that is found in leaves

Chlorophyl

 

I think that's right but it was ages ago that I did this so I'll wait for somebody else to come and correct me.

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green plants photosynthesise all day and all night in summer

All day, can't at night as it needs sunlight

 

photosynthesis takes place in the roots of a plant

in the leaves

roots hold a plant in the ground and absorb carbon dioxide for photosynthesis

absorb water and nutrients to sustain the plant

 

oxygen combines with water to make food for a plant

can't remember this one

 

to catch as much light as possible leaves are narrow and flat (broad + flat)

broad and flat

the reactants of photosynthesis are glucose and oxygen ( carbon dioxide + water)

think your right

 

green plants store carbohydrates in the form of glucose in the leaves

not sure

 

a green water plant will produce more bubbles of carbon dioxide if the light intensity increases

shouldnt it be less? not sure though

 

chopping down lots of trees will increase the greenhouse effect because the amount of nitrogen in the atmosphere is increased (carbon dioxide)

carbon dioxide will increase

 

chloroplast is the green pigment that is found in leaves

chlorophyl

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green plants photosynthesise all day and all night in summer

I think they do it at day but respire day and night

 

photosynthesis takes place in the roots of a plant

Leaves

 

roots hold a plant in the ground and absorb carbon dioxide for photosynthesis

Hold a plant, take water and nutrients

 

oxygen combines with water to make food for a plant

respiration = glucose + oxygen = water + carbon dioxide + energy

 

to catch as much light as possible leaves are narrow and flat (broad + flat)

Broad and flat

 

green plants store carbohydrates in the form of glucose in the leaves

starch isn't it?

 

chloroplast is the green pigment that is found in leaves

Chlorophyl

 

I think that's right but it was ages ago that I did this so I'll wait for somebody else to come and correct me.

 

I'm not a plant expert either however I think you are correct, good Sir.

 

 

here's what I think I can add:

 

a green water plant will produce more bubbles of carbon dioxide if the light intensity increases

not carbon dioxide but oxygen

 

 

chopping down lots of trees will increase the greenhouse effect because the amount of nitrogen in the atmosphere is increased (carbon dioxide)

not nitrogen but carbon dioxide

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cheers guys, just to let you know i knew the chlorophyll one but forgot to bracket it.

 

good help thanks a lot.

 

and what would the answer be to this

write as power of 2 as simply as possible:

 

0.125

 

1

 

2cubed x square root 2 (2power1)

 

2n x 2n +1

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Corrections:

 

green plants photosynthesise all day and all night in summer

All day, can't at night as it needs sunlight

 

photosynthesis takes place in the roots of a plant

in the leaves

 

roots hold a plant in the ground and absorb carbon dioxide for photosynthesis

absorb water and nutrients to sustain the plant

 

oxygen combines with water to make food for a plant

It combines with carbon dioxide.

 

to catch as much light as possible leaves are narrow and flat (broad + flat)

broad and flat

 

the reactants of photosynthesis are glucose and oxygen ( carbon dioxide + water)

Yep, carbon dioxide and water.

 

green plants store carbohydrates in the form of glucose in the leaves

In the form of starch.

 

a green water plant will produce more bubbles of carbon dioxide if the light intensity increases

More bubbles of oxygen.

 

chopping down lots of trees will increase the greenhouse effect because the amount of nitrogen in the atmosphere is increased (carbon dioxide)

carbon dioxide will increase

 

chloroplast is the green pigment that is found in leaves

Chlorophyll

2n x 2n +1

For this one do you mean 2^n x 2^(n+1)? If so, the answer is 2^(2n+1).

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Corrections:

 

 

 

For this one do you mean 2^n x 2^(n+1)? If so, the answer is 2^(2n+1).

 

yeah i think, power (n + 1), not 2^n + 1

 

can someone tell me:

write as product of powers 2&3 as simply as possible:

 

is 12^(2/3) = (2^2 x 3^1) ^2/3 ? I swear if fukd that up

 

also, for same question 18^3n ---- is it something like 2^1 x 3^2n ?

 

 

 

finally

write each number as a product of its prime factors. use indicies where possible (please explain to me too)

 

192

 

1400

 

12 375

 

 

thanks to moogle,grunch and others for help

 

:)

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Economics project called business organisation:

i need to know what areas of business private limited companies cover, some facts and figures about them and some examples of sole trader, partnership, private limited and public limited companies

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yeah i think, power (n + 1), not 2^n + 1

 

can someone tell me:

write as product of powers 2&3 as simply as possible:

 

is 12^(2/3) = (2^2 x 3^1) ^2/3 ? I swear if fukd that up

 

also, for same question 18^3n ---- is it something like 2^1 x 3^2n ?

 

 

 

finally

write each number as a product of its prime factors. use indicies where possible (please explain to me too)

 

192

 

1400

 

12 375

 

 

thanks to moogle,grunch and others for help

 

:)

 

12^(2/3)

= (2*2*3)^(2/3)

= ((2^2) * (3^1))^(2/3) like you said

= (2^(4/3))*(3^(2/3)) slightly simpler

 

18^3n

= (3*3*2)^(3n)

= ((3^2)*2)^3n

=(3^6n)*(2^3n)

 

Prime factors, best way to do it is to divide by lowest prime 2, until its no longer a whole number, then move to the next one until you left with a prime. eg:

 

192

192/2 = 96

96/2 = 48

48/2 = 24

24/2 = 12

12/2 = 6

6/2 = 3 (prime)

 

therefore 192 = 2*2*2*2*2*2*3 = (2^6) * 3

 

1400

1400/2 = 700

700/2 = 350

350/2 = 175 (not divisible by 2 or 3)

175/5 = 35

35/5 = 7 (prime)

 

therefore 1400 = 2*2*2*5*5*7 = (2^3) * (3^2) * 7

 

12375

12375/3 = 4125

4125/3 = 1375 (not divisible by 3)

1375/5 = 275

275/5 = 55

55/5 = 11 (prime)

 

therefore 12375 = 3*3*5*5*5*11 = 3^2 * 5^3 *11

 

 

oh and randomly 1001 = 7 * 11 * 13, it's a nice one to remember

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What happened to the name of the thread?

what did happen to the title of the thread. how could it have been called anything else. Surely it should be the maker of the thread that names it right? who is atomic boo anyway? another boo fan!

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  • 2 weeks later...
Any of you maths people wanna help with this integration by substitution?

 

INTGRL( (X^3) / (SQRT(4+X^2)) ) (boundraries of 1,0)

 

Need to use u=4+x^2

 

Apparently I can get it down to u-4/SQRT U

 

But I don't know how ¬_¬

 

Just did something like this!

 

Urgh, just typed out a load of working, then realised I'd gotten into a worse position. I'm normally very good at these, that one is complete whore IMO...

 

Sorry. :(

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It's to do with using du/dx=2x

 

and changing it into dx=du/2x

 

once you do that it becomes a lot simpler.

 

I got way, way beyond that, and got a nasty equation. If you have no luck with anyone else, once I've finished a mechanics paper I'm doing, I'll give it a crack on paper.

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Any of you maths people wanna help with this integration by substitution?

 

INTGRL( (X^3) / (SQRT(4+X^2)) ) (boundraries of 1,0)

 

Need to use u=4+x^2

 

Apparently I can get it down to u-4/SQRT U

 

But I don't know how ¬_¬

I get the integral from 4 to 5 of (u-4)/2sqrt(u), though I may have made an error.

Somebody please help, I really hate this type of question:

 

 

47231 is a five-digit number whose digits sum to 4 + 7 + 2 + 3 + 1 = 17.

 

How many five-digit numbers are there whose digits sum to 39?

Dear god, you're setting us STEP questions now? I'll have a go, but don't expect a solution...

 

Edit: I give up, I have other work to do. It does help to post all of a STEP question though - in this case "Show that there are 15 five-digit numbers whose digits sum to 43. You should explain your reasoning clearly."

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A ball is dropped from a horizontal plane and rebounds successfully.

The height above the plane is reached by the ball after the first impact with the plane is 4m.

After each impact the ball rises to a height which is 3/4 of the height reached after the previous impact.

Calculate the total distance traveled by the ball from the first impact until it comes to rest.

 

Thanks

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