Messages posted by harman ghuman

i thought the answer would be 14.bt dats wrong

Evaluate the limits for this function, if they exist. If a limit does not exist, enter NONE.

$f(x)={(x^2-62 text( , ) 0<x<9, 14 text( , ) x = 9, 2x+1 text( , ) 9<x)$

a) lim_(x->9) text( ) f(x) = ?

i found out the answer to be 1098.63.bt its not the right answer.

correct answer. please help me in 1 more.Poiseuille's Law gives the rate of flow, R, of a gas through a cylindrical pipe in terms of the radius of the pipe, r, for a fixed drop in pressure between the two ends of the pipe.given that the rate of flow is proportional to the fourth power of the radius. Use k = 225/128Question-What is the rate of flow of the same gas through a pipe of radius 5? Give an exact answer.

reply any1

reply. points for right

You are given the following functions.

(I)

(II)

(III)

Question 1 - Which of the function(s) have the x-axis as a horizontal asymptote? (Select all that apply.)

(I)
(II)
(III)
none of these

Question 2- Which of the function(s) are symmetric about the y-axis? (Select all that apply.)

(I)
(II)
(III)
none of these

Review1

(a) Find the coordinates of C in terms of b in Figure B ??

Question 1 - The desert temperature, H, oscillates daily between 45ºF at 6am and 85ºF at 6pm. Write a possible formula for H in terms of t, measured in hours from 6am. Use the form

H = A cos(Bt) + C.

A =?
B =?
C =?

Question 2 - Simplify the expressions below.

(a) For - infinity < t < ,
cos( tan^-1( t )) =?

(b) For -1 < w < 1,
cot( cos^-1( w )) =?

Question 1 - The desert temperature, H, oscillates daily between 45ºF at 6am and 85ºF at 6pm. Write a possible formula for H in terms of t, measured in hours from 6am. Use the form

H = A cos(Bt) + C.

A =?
B =?
C =?

Question 2 - Simplify the expressions below.

(a) For - infinity < t < ,
cos( tan^-1( t )) =?

(b) For -1 < w < 1,
cot( cos^-1( w )) =?

no1 interested ???

Question 1

The above drawings contain microscopic representations of small samples of three different substances. Which of these images represent a pure chemical compound?
The open circles represent atoms of type A. The solid circles represent atoms of type B.

Only 1

1 and 2

All three

2and 3

Question 2

Which substance has a high melting point, a high boiling point, conducts electricity when melted and when dissolved in water, but does not conduct as a solid?

a)

SO₃

b)

CBr₄

c)

MgBr₂

d)

Cu

Question 3

This chemical equation is NOT balanced

Al + HCl → AlCl₃ + H₂

When balanced the coefficient of H₂ is:

a)

1

b)

2

c)

3

d)

4

Question 4

The following drawing contain a microscopic representation of a mixture of hydrogen H₂( two white dots ) and oxygen O₂ ( two black dots ) in a closed flask.

gas mixture

If these substances react according to the following chemical equation

2H₂ + O₂ à 2H₂O

which of the following images best represents the content of the flask at the end of the reaction?

a)

b)

c)

d)

Question 5

14. What is the mass percent of iron in iron(II) oxalate, FeC₂O₄?

a)

14.29%

b)

61.18%

c)

32.07%

d)

38.82%

Question 6

A compound contains 43.64% P with the remainder being oxygen. What is the empirical formula of the compound?

a)

PO₅

b)

P₂O₅

c)

P₂O₃

d)

P₄O₁₀

Question 7

According to the chemical equation,

4Fe(s) + 3O₂(g) à 2Fe₂O₃(s),

what is the maximum number of grams of Fe₂O₃ that can be produced from 5.0 g Fe and an excess of O₂?

a)

2.5 g

b)

7.1 g

c)

0.045 g

d)

2.0 g

Question 8

(

Which of these is a non polar molecule?

a)

NaF

b)

HF

c)

CF₄

d)

PF₃

Question 9

Which of these solids is likely to be least soluble in water?

a)

MgBr₂

b)

I₂

c)

C₆H₁₂O₆

d)

NaF

Question 10

Which of the following compound is likely to be insoluble in water: Na₂CO₃, ZnS, KOH, and NH₄Cl?

a)

ZnS

b)

KOH

c)

NH₄Cl

d)

Na₂CO₃

Question 11

What is the net ionic equation for the reaction below?

AgNO₃(aq) + KBr(aq) ® AgBr(s) + KNO₃(aq)

	a)	K⁺(aq) + NO₃^-(aq) ® KNO₃(s)
	b)	AgNO₃(aq) + KBr(aq) ® AgBr(s)
	c)	K⁺(aq) + NO₃^-(aq) ® KNO₃(aq)
	d)	Ag⁺(aq) + Br^-(aq) ® AgBr(s)

Question 12

What is the oxidation number of nitrogen in N₂O₃?

a)

0

b)

+1

c)

+2

d)

+3

Question 13

All of the following chemical equations represent oxidation-reduction reactions EXCEPT:

	a)	H₂(g) + Cl₂(g) ® 2 HCl(g)
	b)	C(s) + O₂(g) à CO₂(g)
	c)	Ca(s) + 2 HCl(aq) ® CaCl₂(aq) + H₂(g)
	d)	H₂S(aq) + Zn(OH)₂(aq) à ZnS(s) + 2H₂O(l)

Question 14

A chemist needs 0.050 g of substance A to complete a reaction. If she has a solution with a concentration of 0.25 g/L, how many liters of this solution does she need to add?

a)

0.050 L

b)

0.20 L

c)

0.25 L

d)

5.00 L

optical isomerism ,racemic mixture. i think

what is r(rectus) and s(sinister) system of nomenclature?

what is fischer projection formula?plz explain

how to solve it?

the edge of a cube is measured using a vernier calliper(9 divisions of main scale is equal to 10 divisions of vernier scale and 1 main scale division is 1mm.). the main scale division reading is 10 and one division of vernier scale was found to be coinciding with main scale. the mass of cube is 2.736 gm. calculate density in gram /cm3...

the edge of a cube is measured using a vernier calliper(9 divisions of main scale is equal to 10 divisions of vernier scale and 1 main scale division is 1mm.). the main scale division reading is 10 and one division of vernier scale was found to be coinciding with main scale. the mass of cube is 2.736 gm. calculate density in gram /cm3...

plz tell me also

plz rate me

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