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596277

Suspended

Posted: 13 years ago

#391

Tarzan, mass 85kg swings down from a tree limb on the end of a 20m vine. His feet touch the ground 4.0m below the limb.

A. how fast is Tarzan moving when he reaches the ground?

B. Does your answer depend on Tarzan's mass?

C. Does your answer depend on the length of the vine?

^ Stuck on how to calculate and for B, I think mass cancels out.

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596277

Suspended

Posted: 13 years ago

#392

@ akhl, thanks, have questions above that one too.

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596277

Suspended

Posted: 13 years ago

#393

^ Thanks soo much akhl, you are seriously an amazing tutor, and a life saver :) Thanks so much buddy!

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596277

Suspended

Posted: 13 years ago

#394

^ akhl umm if you don't mind, could you look over this newsletter thing I've written? For errors and stuff.

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akhl

@akhl

Dazzler

Posted: 13 years ago

#395

Ok, PM me the newsletter. I tutor so many students, through skype, that I do not get enough time. Still, I will try to find time.

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Swag Master From Doncaster

@DesiGirl_

Inactive

+ 3

Posted: 13 years ago

#396

WOOHOO! YOU FOUND THE LETTER:

NOW GO TELL YOUR CAPTAIN PM Sweet_Shivani THE LETTER AND LINK, AND GO FIND THE REST OF THE LETTERS FROM YOUR SET! GOOD LUCK

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Swag Master From Doncaster

@DesiGirl_

Inactive

+ 3

Posted: 13 years ago

#397

Which of these materials is a mixture and why:

a.] water

b.] air

c.] methane

d.] magnesium

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komal

@scarlet.moon

Sparkler

+ 4

Posted: 13 years ago

#398

Originally posted by: Sweet_Shivani
Which of these materials is a mixture and why:
a.] water
b.] air
c.] methane
d.] magnesium

It's air because air is a mixture of many gases where as water and methane are compounds and magnesium is an element.

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Swag Master From Doncaster

@DesiGirl_

Inactive

+ 3

Posted: 13 years ago

#399

I have more :O

Two molecules of hydrogen is rep. by 2H2 right?

Why?

Because hydro must have 2 in valence and theirs 2 of it?

LOL. im so dumb :[

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komal

@scarlet.moon

Sparkler

+ 4

Posted: 13 years ago

#400

Originally posted by: Sweet_Shivani
I have more :O
Two molecules of hydrogen is rep. by 2H2 right?
Why?
Because hydro must have 2 in valence and theirs 2 of it?
LOL. im so dumb :[

Yes it is written as 2H2 because hydrogen is a diatomic molecule, it travels with a buddy as H2 and not as a single atom.