Thursday

February 11, 2016
Total # Posts: 762

**Chemistry**

Calculate the mass of H2O that is produced from the combustion of 13.8 mol of C3H8n propane. C3H8 + 5O2---> 3CO2 + 4H2O known: 13.8mol C3H8 unknown: mass of H2O
*February 7, 2016*

**physics**

A projectile starts from rest and moves 7 m down a frictionless ramp inclined at 21◦ with the horizontal. The acceleration of gravity is 9.8 m/s2 . What will be the range of the projectile if the bottom of the ramp is 1.7 m above the ground? Answer in units of m.
*February 3, 2016*

**physics**

nvm. got it
*February 3, 2016*

**physics**

A 0.46 kg mass is attached to a spring with a spring constant of 145 N/m so that the mass is allowed to move on a horizontal frictionless surface. The mass is released from rest when the spring is compressed 0.14 m. Find the acceleration of the mass at the instant the spring ...
*February 3, 2016*

**Math**

Yin's cellphone plan costs $30 a month. She used 12.5 hours in May. What was her cost per minute? About how many call can she make? Yin's average call lasted 3.25 minutes. How much did an average call cost?
*January 29, 2016*

**Chemistry**

OHHH... so, if more heat energy is provided, then more H2O molecules can be broken to their constituent of OH- and H+ due to the endothermic nature of the reaction, and hence the equilibria would favor to the right hand side of the equation in order to 'use up' the ...
*January 27, 2016*

**Chemistry **

I have been plagued by this question for a good half an hour, whilst doing past papers I came across it- ' EXPLAIN why the value of Kw increases as the temperature increases' as far as I can tell, it is about the excess production of OH- and H+ from le chateliers ...
*January 27, 2016*

**perimeter and area**

thank you Steve
*January 26, 2016*

**perimeter and area**

the top of the trusty twisty toaster has an area of 48 inches. if the top is 8 inches wide, how long is the side? what is the perimeter of the top? Length = 6? Perimeter = 28 inches?
*January 26, 2016*

**perimeter and area**

126 centimeters?
*January 26, 2016*

**perimeter and area**

is the width = 8 and the perimeter = 126
*January 26, 2016*

**perimeter and area**

the area of the jazzy juicers box top is 56 square centimeters. the box top is 7 centimeters long. How wide is it? what is the box top's perimeter?
*January 26, 2016*

**perimeter and area**

thank you
*January 26, 2016*

**perimeter and area**

the width is 8? the area is 96?
*January 26, 2016*

**perimeter and area**

the perimeter of the handy dandy doodad is 40 inches. the length of one side is 12 inches. How wide is the doodad? what is its area?
*January 26, 2016*

**perimeter and area**

thank you Ms. Sue
*January 26, 2016*

**perimeter and area**

the perimeter of the think thing thingamabob is 24 centimeters. All the thingamabob's sides are same length. How long are they? What is the Thingamabob's area? L = ? A = ? I think Length = 6 I think Area = 36 is this correct? if not can you show or explain? thank you
*January 26, 2016*

**perimeter and area**

sorry I meant 90
*January 26, 2016*

**perimeter and area**

Ms. Sue my answers are w = 6 and A = 42 would those be correct? thank you
*January 26, 2016*

**perimeter and area**

The Ding-Dong doodad is a hot seller. The Top of its box has an area of 90 square centimeters. The box's top is 15 centimeters long. How wide is it? what is the doodad box tops perimeter? W = ? A = ?
*January 26, 2016*

**perimeter and area**

thank you I was correct and wanted to confirm.
*January 26, 2016*

**perimeter and area**

the top of a giddy gizmo has an area of 25 square inches. the Gizmo's top is square. How long is each of the top's sides?
*January 26, 2016*

**math**

the great goofy gadget comes with a page of instructions. when the page is unfolded, it is 81 square inches. if one side of the page is 9 inches wide, what is the perimeter?
*January 26, 2016*

**math**

compare the models for 1/3 and 2/6. How does the number of parts relate to the size of the parts.
*January 23, 2016*

**la**

chose the meaning that best matches the word in italics. many actors avoid playing superheroes because they fear the ********stereotype******** that comes with success in the role. a label b popularity c persona d restrictions
*December 22, 2015*

**math percent**

Find the percent of markup. Round to the nearest tenth $31.00 to $35.00
*December 18, 2015*

**math**

Find the percent of markup. Round to the nearest tenth $31.00 to $35.00
*December 18, 2015*

**History**

The fate of the Owens valley resulted in all of the following except a. the Owens River and Lake dried up. b. farmers no longer had adequate water for irrigation c. fire destroyed much of the towns of Lone Pine and Bishop d. within a few years Los Angeles was still in need of ...
*December 16, 2015*

**11U Functions Identity**

-sin x -cos x cot x = -csc x
*December 8, 2015*

**Critical thinking **

If you can draw another conclusion from premises is the conclusion inductively invalid?
*December 7, 2015*

**Calculus**

Set up a double integral for calculating the flux of the vector field F⃗ (r⃗ )=r⃗ , where r⃗ =⟨x,y,z⟩, through the part of the upward oriented surface z=9(x^2+y^2) that lies above the disk x^2+y^2≤25.
*December 6, 2015*

**Calculus**

How do i set up the integral?
*December 6, 2015*

**Calculus**

Find the surface area of the part of the sphere x^2+y^2+z^2=81 that lies above the cone z=√(x^2+y^2)
*December 6, 2015*

**Calculus**

Find the surface area of the part of the sphere x2+y2+z2=81 that lies above the cone z=√(x2+y2)
*December 6, 2015*

**Philosophy **

Read the following argument and answer the question that follows: 1. According to the 2010/11 Statistics Canada census aboriginal Canadians constituted 4.3% of the Canadian population. 2. According to the 2011 Statistics Canada data, 27% of the adult population incarcerated in...
*December 6, 2015*

**Chemistry (Gas)**

A cylinder is filled with 120L of air at 101 kPa and 20*C. How long could the cylinder be used "just underwater" on earth assuming 2L is used every 5 seconds. I don't understand what the pressure and temperature would be "just underwater." Is it assumed...
*December 5, 2015*

**math**

the amount of jens month phone bill is normally distributed with a mean of $69 and a standard deviation of $10. what is 68.26% of phone bill between?
*December 3, 2015*

**chem**

A balloon was filled to a volume of 2.55 L when the temperature was 30.0∘C. What would the volume become if the temperature dropped to 11.0∘C.
*November 30, 2015*

**Philosophy**

The Omega watch company withdrew its ads from Vogue magazine in protest over what it called distasteful pictures of an emaciated model in the June 1996 issue. The brand director of Omega argued as follows: “Since Vogue presumably targets an audience that includes young ...
*November 21, 2015*

**Calculus**

For the vector field G⃗ =(yexy+3cos(3x+y))i⃗ +(xexy+cos(3x+y))j⃗ , find the line integral of G⃗ along the curve C from the origin along the x-axis to the point (3,0) and then counterclockwise around the circumference of the circle x2+y2=9 to the point (...
*November 20, 2015*

**Physics**

How would I find the direction component using Bob's method? He is prompting for the vector including direction (degrees)
*November 19, 2015*

**Physics**

How can I find the vector if energy works in scalars? I can find the final speed without problem but I can't break it down into components or figure out how to get the direction at all
*November 19, 2015*

**Physics**

At the moment when a shotputter releases a 7.26 kg shot, the shot is 2.0m above the ground and travelling at 15.0 m/s. It reaches a maximum height of 8.0m above the ground and then falls to the ground. Assume that air resistance is negligible. What is the final velocity of the...
*November 19, 2015*

**physics**

a 50kg box on a ramp needs to be lifted 3m using a force of 100N. What tpe of pulley system could do the work? What type of lever system?
*November 17, 2015*

**Philosophy- Critical thinking**

INSTRUCTIONS For the purpose of this assignment the conditions of premise acceptability are: (i) acceptable by observation (ii) acceptable by testimony (iii) acceptable by authoritative testimony (only use if the premise explicitly refers to an authority) (iv) acceptable a ...
*November 6, 2015*

**Critical thinking - Reed?**

Or it could be Unacceptable by testimony because you have to use other sources to know that Nagoya is not in Kyushu island.
*November 5, 2015*

**Critical thinking - Reed?**

Uhm, I think Nagoya is not in Kyushu Island.
*November 5, 2015*

**Critical thinking - Reed?**

Because David Johnston is Canada's Governor General.
*November 5, 2015*

**grammer**

were irrigated
*October 22, 2015*

**grammer**

had suffered
*October 22, 2015*

**s**

he a 1.00 m sol'n of nitric acid. how many ml of this sol'n will he need to add to the soil to completely react with 56.8 g of al(oh)3
*October 19, 2015*

**Calculus**

Never mind I figured out how to do it.
*October 18, 2015*

**Calculus**

What is the shortest distance from the surface xy+6x+z^2=33 to the origin?
*October 18, 2015*

**Calculus**

A company manufactures x units of one item and y units of another. The total cost in dollars, C, of producing these two items is approximated by the function C=7x^2+xy+1y^2+600. A) If the production quota for the total number of items (both types combined) is 182, find the ...
*October 18, 2015*

**chem**

Keq for the reaction 2HI <----> H2 +I2 has a value of 1.85x 10^-2 at 425 degrees celsius. If 0.18 mol of HI is placed in a 2.0 L flask and allowed to come to equilibrium at this temperature. What will the equilibrium of [I2} be?
*October 13, 2015*

**chem**

0.020 mol of each SO2 and O2 and So3 is placed in a 1.0 L flask and allowed to come to equilibrium. The equilibrium of [SO2] is found to be 0.0080M. What is the value of keq for the reaction: 2SO2+O2<----> 2SO3
*October 13, 2015*

**chem**

A 3.00 L flask contains 6.00M H2, 6.00M Cl2, 3.00M HCl at equilibrium. An additional 15 mol of HCl is injected into the flask. What is the [Cl2] when equilibrium is re- established?
*October 13, 2015*

**MATH**

x+3y=400 15x+8*3y=L 15(400-3y)+8*3y+L
*October 10, 2015*

**Algebra**

y=mx+b 1=(-3/2)(0)+b b=1 y=(-3/2)x+1
*October 10, 2015*

**Calculus**

Sketch the vector field F⃗ (r⃗ )=2r⃗ in the plane, where r⃗ =⟨x,y⟩. Select all that apply. A.All the vectors point away from the origin. B. The vectors increase in length as you move away from the origin. C. All the vectors point toward ...
*October 10, 2015*

**math **

supposed that k is a random variable. given that P(-3.7<=k<= 3.7) = 0.525 and that P(k<3.75) = P(k>3.7), find P(k>3.7).
*October 7, 2015*

**math **

determine the y-intercept and slope of the linear equation y=-6+3x
*October 7, 2015*

**Math**

supposed that two balanced dice are rolled. let Y denote the product of the two numbers. use random variable notation to represent the event that the product of the two numbers is greater than 4 a {5,6} b {XY>4} c{Y>4} d P(Y>4)
*October 7, 2015*

**statistics**

supposed that two balanced dice are rolled. let Y denote the product of the two numbers. use random variable notation to represent the event that the product of the two numbers is greater than 4 a {5,6} b {XY>4} c{Y>4} d P(Y>4)
*October 7, 2015*

**Math**

If 10 classes in 10 schools receive 10 calculators each, which expression (10+10+10 or 10x3 or 1000 ) represent the amount of calculators the school discrit will buy.
*October 5, 2015*

**Organic Chemistry**

Describe why an unsubstituted C6 ring doesnt have any steric strain, torsional strain or angle strain.
*October 5, 2015*

**Chemistry**

Calculate the mass of a sample of gold that occupies 0.723 cm3. The density of gold is 19.3 g/cm3. Answer in units of g.
*September 30, 2015*

**Chemistry**

If the color of a silver nanoparticle remains constant, what does that tell you about the tendency of the particles to aggregate under those conditions? I think the particles won't aggregate, but I am not sure why. Is it because the atoms are moving at a constant rate?
*September 24, 2015*

**Calc- Limits**

what is the limit of x as it approaches 1 when x/ln x?
*September 23, 2015*

**Pre-Calculus**

Why does sin 30° = 150° (or sin π/6 = sin 5π/6)? Refer to both the unit circle and the graph of the sine curve.
*September 21, 2015*

**precalc**

Given that sec 3π/10 ≈ 17/10 and csc 3π/10 ≈ 17/14, find the following: 1. sin 3π/10 ≈ 14/17 (is this one correct) 2. csc 43π/10 ≈ 3. sec 2π/10 ≈ 4. cot -12π/10 ≈ 5. tan π/5 ≈ 6. sin -7π/10 &#...
*September 16, 2015*

**precalc**

are these correct? 1. (√19)/9 2. √19/10 3. 1/10 and i'm not sure how to do 4 and 5
*September 16, 2015*

**precalc**

Given that sin 64° = 9/10 and cos 64° = (√19)/10 find the following: 1. cot 64° = 2. cos -64° = 3. csc 64° = 4. csc -26° = 5. sec 244° =
*September 16, 2015*

**precalc**

what is the value of cot 2π/5? how do i find the answer?
*September 14, 2015*

**vocabulary**

I need the word stratify in a sentence for a 7th grader
*September 13, 2015*

**math**

1 mulliken = 10 inches 11 9/10 inches = how many mullikens? 5 13/16 inches = how many mullikens?
*September 12, 2015*

**algebra**

is f(x)=5+√2-x an increasing or decreasing function?
*September 11, 2015*

**trigonometry**

Angles of the triangle: ∠A=30° ∠B=60° ∠C=90° Hypotenuse: 1 mulliken (10 inches) How can I find the sin A, cos A, and tan A?
*September 10, 2015*

**trigonometry**

This was all the information I was given. Would it help to know the angles of the triangle? ∠A=30° ∠B=60° ∠C=90°
*September 10, 2015*

**trigonometry**

The length of AB is 1 mulliken (10 inches) on ΔABC. Calculate the lengths of AC = _____________ mullikens and BC = _____________ mullikens.
*September 10, 2015*

**precalc**

G(x)=2x+7 H(x)=1/(x+2) 1) H(G(x))= J: y=-3x^2 2) J(H(x))= 3) J/H=
*September 9, 2015*

**algebra**

The slope of a line perpendicular to y=-2x+4 is: A) 1/2 B) 1/4 C) 2 D) -2 E) -1/4 F) -1/2 would it be A?
*September 3, 2015*

**Math**

A ribbon is 3 2/3 long. Mae needs to cut the ribbon into pieces that are 2/3 yard long. How much ribbon will be left after she cuts these pieces?
*September 1, 2015*

**physics**

A body travels a distance of 2 m in 2 second and 2.8 m 8m in next 4 second what will be speed of body at the end of 10 th second from the statr
*August 16, 2015*

**Calculus**

????
*July 26, 2015*

**Biology**

1) The nose has small __________. 2) Hairs in the nose trap __________. 3) The nose makes a sticky liquid called __________.
*July 15, 2015*

**dow**

61.2=12.6 * 20.4
*June 10, 2015*

**Chemistry**

Find the number of atoms in 138 grams of nickel. I'm not sure where to start. Can anyone help me?
*June 10, 2015*

**math**

thank you that much I know I just don't know how much to ordinary interest is
*May 20, 2015*

**math**

a loan for $2000 with a simple interest rate of 15% was made on September 29th and was due November 30th I have to find the ordinary interest rate and don't know how I know there are 62 days between those two dates with just two months and one day I don't know the rest
*May 20, 2015*

**MathematicalModels**

Can you show workings for the answer above as I cannot obtain it?
*May 18, 2015*

**math**

a man holds a note of $6,000 that has an interest rate of 13% annually the note was made on march 17 and is due november 11 he sells the note to a bank on june 14 at a discount rate of 12% annually find the proceeds on the third-party discount rate. Ok now I m a little confused
*May 16, 2015*

**math**

A man makes a simple discount note with a face value of $2,200, a term of 140 days, and a 9% discount rate. Find the discount.
*May 16, 2015*

**math**

I borrowed $10,000 on a 120-day note that required ordinary interest at 12.19% I paid $5,000 on the note on the 60th day how much interest did I save by making the partial payment
*May 16, 2015*

**math**

find the adjusted balance due at maturaty for 90 day note of $12,000 at 13.1% ordinary interest if a partial payment of $6,000is made o\n the 60th day of the loan
*May 16, 2015*

**math**

find the adjusted balance due at maturaty for 90 day note of $12,000 at 13.1% ordinary interest if a partial payment of $60,000is made o\n the 60th day of the loan
*May 16, 2015*

**math**

the principle is $700 and the paid $53.96 in interest
*May 16, 2015*

**math**

so i think it will be 45%
*May 16, 2015*

**math**

if i do it for 12 453,264 so it would be for a year it is 700 borrowed for 7 months paid interest 53.96
*May 16, 2015*

**math**

its in months 7 so do i do 12 for a year
*May 16, 2015*