# Posts by Kristien

Total # Posts: 29

**Chemistry**

Thanks again

*March 7, 2013*

**Chemistry**

Recall that all aqueoous solutions contain_____. Water can also undergo ____. This process is called the ______of water. The reaction can be written as: Notice the double arrow in the reaction. This indicates that the reaction is_____. However, only a tiny fraction of water ...

*March 7, 2013*

**Chemistry**

OMGGGTHANKYOUUU SOOOO MUCHHHSIR!!! I REALLY appreciateyour helpp!!!Thankyou!!

*March 7, 2013*

**Chemistry**

awn noo:(

*March 7, 2013*

**Chemistry**

These blanks I REALLLY need your help. Our teacher gave the teaching job to this other I think coop student who wants to be a teacher to teach for a day but I| seriously don't understand anything she said..in short I don't have anyyy clue about this. So please help me...

*March 7, 2013*

**Math**

You are in a car of a ferris wheel. The wheel has a radius of 8m and turns counterclockwise. Let the orgin be at the center of the wheel. Begin each sketch in parts a) and b) when the radius from the centre of the wheel to your car is along the positive x-axis. a) Sketch the ...

*March 6, 2013*

**Math**

1) The hour hand on a clock has a length of 12 cm. Let the orgin be at the center of the clock. a) Sketch the graph of the vertical position of the tip of the hour hand versus the angle through which the hand turns for a time period of 72h. Assume that the hour hand starts at ...

*March 6, 2013*

**math**

Ok I understand:)

*March 6, 2013*

**math**

Ms. y did u skip my question?

*March 6, 2013*

**math**

distance = speed/time

*March 6, 2013*

**math**

1) The hour hand on a clock has a length of 12 cm. Let the orgin be at the center of the clock. a) Sketch the graph of the vertical position of the tip of the hour hand versus the angle through which the hand turns for a time period of 72h. Assume that the hour hand starts at ...

*March 6, 2013*

**Chemistry**

A strip of zinc metal was placed in a beaker that contained 120mL of a solution of copper(2) nitrate, Cu(NO3)2(aq). The mass of the copper produced was 0.813g. Find the initial concentration of the solution of copper(2)nitrate. Can u help me out with making the balanced ...

*March 5, 2013*

**Chemistry**

If 8.5g of pure ammonium phosphate , (NH4)3PO4(s), is dissolved in distilled water to make 400mL of solution, what are the concentrations (in moles per litre) of ions in the solution. How would I solve this type of stoichiometric problem. I know the steps Step 1: make the ...

*March 5, 2013*

**Chemistry**

If 8.5g of pure ammonium phosphate , (NH4)3PO4(s), is dissolved in distilled water to make 400mL of solution, what are the concentrations (in moles per litre) of ions in the solution. How would I solve this type of stoichiometric problem. I know the steps Step 1: make the ...

*March 5, 2013*

**Math**

we never learned this identity at school...is there any basio other identity thtwould help bcz im sure that since we neverlearned this identity in class he wont mark it right on a test..

*February 24, 2013*

**Math**

Prove the identity: tanA/secA+1 = secA-1/tanA Can u please explainit to me step by step? I greatly appreciate your help! Thanks:)

*February 24, 2013*

**Trig identities:(**

?? Im sorry i don't understand what u did but im sure that this is an identity we have to prove that the left side equals the right side:)

*February 23, 2013*

**Trig identities:(**

Sin4A - cos4A = sin2A - cos2A Can i just square root the left side??:O

*February 23, 2013*

**Math**

Ohhhhhhhhhhhhhhhhhhhhhh omg!!! Thankyouuuuu sooooo much that helped me a lot!! Ur the best👍so cool:D thankyouuu!

*February 23, 2013*

**Math**

Yes but can u help me do one full one so i can understand how to do it. And u cant cros multiply because there is a equal sign between them and our teacher said just to work with the complicated side and then work it out until u get the right side so how would i do that with ...

*February 23, 2013*

**Math**

CosA/1+sinA=1-sinA/cosA I have to prove the identity each side has to b the same how would i do that? I have a unit test on monday so im doing practice questions

*February 23, 2013*

**math**

Ok thts ok im hoping someone else will help if they understand but thankyou soo much for considering me:) i appreciate ur time u read my question😔

*February 23, 2013*

**math**

Did i do something wrong?

*February 23, 2013*

**math**

Ms sue why arent u solving mine? Is there any problem?

*February 23, 2013*

**Math**

Oh ok:) thanks alot but does that mean i cant ask u for help:'( don't do this to me sir! I will follow ur advice and do my best and try many of those problems but can i still ask u if i cant solve some??:(

*February 23, 2013*

**Math**

Tht will take awhile wont it? Do u think i can master it by monday:( i also have cast rule, ambiguous case, sine and cosine law, primary trig ratios to study tho:( do u think its possible:(?

*February 23, 2013*

**Math**

So sinB and sthe sonB under cosB cancels out and then u have cosB * 1/cosB so u multiply them and get cosB/cosB and so that is 1 Did i do it right??? Please say yes:( i worked on this one for 30 min sir:( i feel like im stupid now😢

*February 23, 2013*

**Math**

Tht was me i forgot to write my name

*February 23, 2013*

**Math**

Prove identity Cot⭕sin⭕sec⭕= 1 How would i do this one please help me. Thankyou

*February 23, 2013*

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