Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 163

**CHEMISTRY.**

what would be the VSEPR shape of pyridine?

**CHEMISTRY.**

what would be the VSEPR shape of pyridine?

**chem**

Why is it expected that 2/10 of the ejected electrons will cone from the n=1 shell, and 8/10 ofthe electron from the n=2 shell?

**CHEMISTRY.**

can you please explain how?

**CHEMISTRY.**

Lowering of vapor pressure is directly proportional to: a) Temperature b) Mole fraction of Solute c) Mole fraction of Solvent d) Amount of solution

**CHEMISTRY.**

Lowering of vapor pressure is directly proportional to: a) Temperature b) Mole fraction of Solute c) Mole fraction of Solvent d) Amount of solution

**engliSH**

how ?

**engliSH**

The opposite of withdraw is? a) Shocked b) puzzled C) relieved D) revealed

**CHEMISTRY.**

Lowering of vapor pressure is directly proportional to: a) Temperature b) Mole fraction of Solute c) Mole fraction of Solvent d) Amount of solution

**math**

the population of a town is declining at a rate of 4.1% per year. the current population is 25000. 1)what will the population be in 7 years. 2) how long will it take the population to reach 15000?

**PHYSICS!!!!!!!! HELP!!!!!!!**

Can someone give me an example of a problem where you have to find electric field and magnetic field using an electron gun?

**Physics**

jhgjhjk

**Physics**

what is the relationship between forces in equilibrium and their components?

**Math**

x^2=-1 x=underroot -1.

**computer sicence C++**

Americans spell differently from Canadians. Americans write "neighbor" and "color" while Canadians write "neighbour" and "colour”. Write a program to help Americans translate to Canadian. Your program should interact with the user in the...

**Physics**

what is the relationship between forces in equilibrium and their components?

**Physics**

what is the relationship between forces in equilibrium and their components?

**Physics**

what can be the source of error in lab of forces equilibrium,force board lab?

**Physics**

what can be the source of error in lab of forces equilibrium,force board lab?

**Physics**

what is the relationship between forces in equilibrium and their components?

**Physics**

the distance between two successive crests in waves is 1.50m, and the source generates 25 crests and 25 troughs in 5.00sec. what is the speed of the waves?

**C++ programming**

write a program C++ program and Use a recursive function that finds the n-th term using the following rule: tn=3tn-1+12tn-2 . please help me out!

**Physics**

A force of 2000N is used to push a box up am inclined plane that is 15m long. If the 100 kg box is raised to a height of 8m,how much work is done against friction ?let g=10m/s^2.

**PHYSICS**

1kg of fat is equal to 30MJ of energy.the efficiceny of converting fat to energy is 20%. suppose you life a mass of 12kg 2.0m vertically,500 times, how much work do you do? if all the energy used to do the work comes from the burning fat how much fat is used ?

**PHYSICS help please!!!!!!!!!!**

At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how many kil...

**Algebra**

a=3b+7...eq (1) 4a+9b=70 or 4a=-9b+70...eq (2) multiplying equation i by 3 3(a)=3(3b+7)...eq (1) 3a=9b+21...eq (3) subtracting equation (2) from eq(3) 4a=-9b+70...eq(2) 3a=9b+21...eq (3) a = 49 this is the value of a

**Math**

sorry my mistake its =2(7)^2(1+7) =784 that is c

**Math**

=2(1)^2(1+7) =16

**PHYSICS**

At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how many kil...

**Science Check Answer**

false because acceleration is the time rate of change of velocity. speed is scalar and acceleration vector it cannot be ture.

**PHYSICS**

if all the energy used to do the work comes from the burning fat how much fat is used ?

**PHYSICS**

1kg of fat is equal to 30MJ of energy.the efficiceny of converting fat to energy is 20%. suppose you life a mass of 12kg 2.0m vertically,500 times, how much work do you do?

**physics **

At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how many kil...

**physics **

At a nuclear power plant water at 8°c from a lake is used in a heat exchanger to condense spent steam at a temperature of 120°c,to water at 85°c before it is recycled to the reactor. If the cooling water returns to the lake at a temperature of 19°c,how many kil...

**PHYSICS'S**

Can you please tell me what value of specific heat did you used for q3?

**PHYSICS'S**

Can you please tell me what value of specific heat did you used for q3?

**PHYSICS'S**

But my table have specific heat in J/kg.k And latent heat in kJ/kg That's why I only converted °c to k and kJ into J

**PHYSICS'S**

Did you solved the problem? Is it 2.6×10^6J? I don't know where I am doing it wrong...I checked my work thrice but still the answer is wrong.

**PHYSICS'S**

OK I converted °C to K but the answer now is 4304530J

**PHYSICS'S**

For (a)336000J (B) 2255j (C) 20000j I added them and the answer is 358255j Which is totally different from the correct answer ....am I doing it right ?

**PHYSICS'S**

How much heat would it take to change 1.0kg of water at 20°C to steam at 110°C. I can't get the right answer that is 2.6×10^6J. Please tell me how can I solve this problem, I want to learn how to solve These problem plz help me.

**PHYSICS......**

review questions for test...

**PHYSICS......**

Q1.a building has three alternative routes from the ground to the first floor. i)a flight of stairs at an angle of 45 degree. ii)a near flight ladder angle 85 degree. iii)a long zig-zag slope at an angle of 15 degree. what are the disadvantages and advantages of each case abov...

**math**

how to we convert one currency to another is there any formula? or plz give me an example. i have no idea how do we convert.

**can any smart person in c++ can answer this?**

A “magic” number is an integer in which the number is equal to the sum of the cubes of its digits. Write a program to determine whether a three digit number entered by the user is a magic number.

**Computer language.**

a program that prints all the numbers from 1 to 1000 that are divisible by 7. (in C++)

**C++**

a program to sort three values (from smallest to largest) entered from the keyboard. Algorithm: 1. INPUT a,b and c 2. If a greater than b If a greater than c If b greater than c The order is a, b, c Else The order is a, c, b Else . . . How will i code this?

**physics**

how do we find the interpolation from a graph to determin the number of images which should be observer with a mirror angle of 90 degree and how do we calculate the line equation.

**chemistry.....help plz**

what is the density of methane gas at 20 degree and 115kpa?

**chemistry**

is the dry hydrogen 98.13kpa? and is the mass 224.1g?

**chemistry**

peice of sodium metal reacts with water. 246ml volume of hydrogen gas was collected over water at 25 celsius and at an atmospheric pressuric pf 101.3 kpa. what was the pressure of dry hydrogen? what is the mass of sodium used up by the reaction?

**chemistry**

and mol/l ?( the density of the solution is 1.15g/ml)

**chemistry**

25g of NaCl is deissolved in 100g of water. what is the concentration in percentage by mass?

**chemistry**

how can i sketch a heating curve for benzene (mp=5.5 celius and bp=80.1 celeus?

**chemistry**

what is the density of methane gas at 2o degree and 115kpa?

**ms sue**

can you explain how you got 1/2 x 5-4x ?

**ms sue**

triangle base is (4-x)cm and its height is (2x+3)cm.what will be the maximium area?

**math problem. help**

triangle base is (4-x)cm and its height is (2x+3)cm.what will be the maximium area?

**math help!**

how to find the points thought which the function goes like if the vertex is 2,5 and it goes through (6,-1) how would i find the other point?

**math help!**

yeah i know but how will you know when to use this discriminant formula ?

**math help!**

how to find the x intercept of d(x)=9x^2-4x+7

**math**

but the anwer is (-3,0)(7,0) how can i get that?

**math**

point of symmetry? 2(x-7)(X+3) and vertex?

**math**

1/2x^2=x/4+1 how can i solve that with quadratic formula?plz i need the solution fast.

**math**

how to determine the acute angle between the line 2x+3y=6 and the y axis?

**math help!**

a hockey arena has a total seating capacity of 15690.the first row of seats around the rink has 262 seats. the number of seats in each subsequent row increases by 18. how many rows of seats are in the arena?

**math help!**

for god sake plz help me.

**math help!**

(2-√2)/(3+√2) can you plz tell me how to solve it? plz hurry up

**chemistry**

why mass of mg is determined indirectly by measuring its length instead of passing by balance?

**Math**

5x^2+5x-2 how to find the root?

**Math**

y=3x^2=5x-1 how to sole it with partial factoring?

**Math**

+ between 3x^2 and 5

**chemistry**

how to find the pressure exerted by the hydrogen alone? and the volume of dry hydrogen at SATP? i have room temperature=23C room pressure =101.62kPa volume of h2 gas & H2O vapour collected =43.2ml temperature of water = 23C length of Mg ribbon = 3.00cm

**english poem**

As fair as morn, as fresh as May, a pretty grace in saying nay, Smil'st thou sweetheart? then sing and say, Ta na na no, But O! that love enchanting eye, Lo, here my doubtful doom I try, Tell me my sweet, live I or die? She smiles, fa la la la, Ah, she frowns, Ay me, I die...

**english**

its for my poem just wanna know is it okay?

**english**

birds hidden in nests from fear of cold is this sentence correct?

**english poem**

i changed the sentence number 6 "never saw a heart crushed like a walnut"

**english poem**

where should i make the changes ?

**english poem**

a failure lover.

**english poem**

yeah healing and dose this poem make sense and is it good or not or any grammatical mistakes ?

**english poem**

yeah crushed sorry my mistake. then what should i use instead of aparted?

**english poem**

plz can anyone check my poem and mark my correct my mistakes. Lasts Forever once aparted, never met again never saw the wound heeling again once desired, beyond dreams no one i saw blessed anymore once hurtled, smashed from the roots never saw a tree crashed like a walnut once...

**math**

term given by x+2,3x-1,and 4x-1 form an arithmetic sequence. find the value of x. i didn't get it how to start this question and how it forms arithmetic sequence?

**chemistry**

and its titration of KHP and NaOH.

**chemistry**

it just say ratio NaOH used: Mass of KHP ?

**chemistry**

so i will convert volume of naoh to moles first then to mass and divide it by mass of khp and that will be my ratio?

**chemistry**

i have to find the ratio of naoh:mass of KHP. but i have volume oh NaOH and mass of KHP and i dont know how to find the ratio then plz help me right now.

**biology**

why are yeast classified as eukaryotes? i know they are in kingdom fungi and all the members are eukaryotes but why?

**biology**

reproduce

**math**

t8=1024 and decrease by 2/3. what will be the sum of the first 7 term. i dont know what shud i do first to solve it.

**math**

how would i find the sum of the 7 term. if i have 1st term = 11 and 7th term = 704.its a geometric series. i dont know how to find the difference?

**math**

first term of the arithmetic sequence is 13. two other terms of the sequence are 37 and 73. common difference is consecutive terms integers. determine all possible values for 100th term.

**math help!**

the 10th term is 34 of arithmetic series and the sum of the 20th term is 710 i.e S20=710.what is the 25th term?

**math**

the answer is t25=79 and it sum of 20th term that is S20=710.

**math**

the 10th term is 34 of arithmetic series and the sum of the 20th term is 710.what is the 25th term?

**math**

how did you gt 19d ?

**math**

bricks are stacked in 20 rows such that each row has a fixed number of bricks more than the row above it. the top row has 5 bricks and the bottom row 62 bricks. how many bricks are in the stack?

**math**

the vertex can't be (-1,-9) its incorrect.

**math**

then your vertex is (-2,8) and axis will be -1

**math**

b. axis of symmetry is zero.