Thursday

February 23, 2017
Total # Posts: 1,399

**Chemistry/Physics**

The equation needed to solve for volumetric flow rate = flow area * velocity How do you calculate flow area when all is given is velocity 1 m/s and 6000 m^3.

*September 4, 2012*

**Chemistry/Math**

Where does the 5 come from?

*September 4, 2012*

**Chemistry/Math**

(6000)(1/86400)*(1/3)sqrt(5/2Pi)

*September 4, 2012*

**Chemistry/Math**

When I calculate what you did, I don't get the same answer.

*September 4, 2012*

**Chemistry/Math**

I went to my teacher numerous times. I'm still not using the right formulas or equations. Please help. A commonly used rule of thumb is that average velocity in a pipe should be about 1 m/s or less for "thin" (viscosity about water). If a pipe needs to deliver 6,...

*September 4, 2012*

**Science**

I have no idea what to do, and the teacher wants the volumetric flow rate (in cm). A commonly used rule of thumb is that average velocity in a pipe should be about 1 m/s or less for "thin"(viscosity about water). If a pipe needs to deliver 6,000 m^3 of water a day, ...

*August 31, 2012*

**algebra**

one angle of a parrallelogram is 23 degrees less than six times the measure of the angle next to it.the sum of the measures of the angles is 180 degrees. find the measure of the adjacent angles of the parrallelogram.

*August 27, 2012*

**MATH**

ROBERT NUMBER IS BETWEEN 20 AND 32. THE SUM DIGITS IS 10. WHAT IS ROBERT NUMBER? I KNOW ANSWER IS 28 BUT NEED TO KNOW STEP BY STEP HOW TO GET TO 28?

*August 23, 2012*

**VOCABULARY**

In order to change the meaning of the word teach from "to give instruction" to "to give instruction with" you would add the prefix .

*August 17, 2012*

**Chemistry**

100 g

*July 30, 2012*

**Human Resources**

What do you think are three most prominent characteristics of a human service professional?

*June 29, 2012*

**math**

x2 -x - 6? the 2 is exponent

*June 24, 2012*

**math**

P=2L+2W+L Please check my answer L=P-2w/2

*June 13, 2012*

**math**

2x+3y=9

*June 13, 2012*

**math**

The radius of a circle in terms of its circumference

*June 13, 2012*

**Math (2)**

A person just fitted for contact lenses is told to wear them only 2 hours the first day and to increase the amount of time by 20 minutes each day. After how many days will the person be able to wear the contacts for 14 hours?

*June 10, 2012*

**Math**

A person just fitted for contact lenses is told to wear them only 2 hours the first day and to increase the amount of time by 20 minutes each day. After how many days will the person be able to wear the contacts for 14 hours? *Solve using a arithmetic series

*June 10, 2012*

**math**

Thank you for the clarification on A and for B the way the question is worded I think I'm going to go with the .96... THANKS GUYS!

*June 8, 2012*

**math**

the question is asking for the eighth time it hits the ground so wouldn't that include the other part of the .96, because what you have here is technically hitting the ground 7 times and the ball is in mid-air.... and for b) how did you set the problem up? Thank you!

*June 8, 2012*

**math**

A superball is dropped from a height of 2 m and bounces 90% of its original height on each bounce. (a) When it hits the ground for the eighth time, how far has it traveled? (b) How high off the floor is the ball on the eighth bounce?

*June 8, 2012*

**Intermediate Algebra**

y varies directly as the cube of x and inversely as the square of z. If y is 30 when x is 2 and z is 4: b) Find the equation that models this data. c) Find the value of y when x is 3 and z is 2.

*April 28, 2012*

**Calculus**

the edge of a cube was found to be 18 inches with a possible measurement error of 0.1 find the max possible error in calculating the surface area of the cube

*April 18, 2012*

**college chemistry**

0.171 g Li

*April 15, 2012*

**college chemistry**

75.0 g NaHCO3

*April 15, 2012*

**Algebra**

Reiny...yes, thank you. I appreciate the help so much. I did have the some work-up for X=smallest angle. Thanks for starting me out for the next 2 angles.

*April 14, 2012*

**Algebra**

The following problem must be solved 3 different ways in which X=smallest angle for problem 1. Problem 2 would be X=medium sized angle. Problem 3 would start with X=largest angle. I was able to figure out X=smallest angle, but I am stumped on the other 2 as to how to set it up...

*April 14, 2012*

**math**

13.2

*March 27, 2012*

**Accounting1**

Consider the following scenarios: (Please respond to each scenario) When we talk about "bad checks," are those always checks our customers have written to us? Explain. Would the company also write any bad checks and what are the repercussions for the same? Give ...

*March 27, 2012*

**math**

30 3/4 x 60 3/8 what is the area of the new building?

*March 23, 2012*

**General math**

30 3/4 x 60 3/8

*March 20, 2012*

**Calculus**

Find the following limits algebraically or explain why they don’t exist. lim x->0 sin5x/2x lim x->0 1-cosx/x lim x->7 |x-7|/x-7 lim x->7 (/x+2)-3/x-7 lim h->0 (2+h)^3-8/h lim t->0 1/t - 1/t^2+t

*March 15, 2012*

**Chemistry**

1.67014614E-27 kg

*March 4, 2012*

**Chemistry**

1.67014614E-27

*March 4, 2012*

**Algebra**

The electric current I in a circuit varies directly as the voltage V. When 21V are applied, the current is 4A. What is the current when 18 volts are applied

*March 2, 2012*

**Calculus**

what is the curve given by the equation x^3=3xy^2+y^3=1 what is dy/dx?

*February 29, 2012*

**yargo**

a garden is shaped like an x. there is a right angle at each corner of the garden and each side of the garden measures 40 feet long. what is the area of this garden?

*February 27, 2012*

**Calculus**

find f'(x) if f(x)= (cosx)^sinx

*February 23, 2012*

**Calculus**

find y' if sin^-1(xy)=cosy

*February 16, 2012*

**Simple Interest & Maturity Value**

On September 7, Jennifer Rick went to Park Bank to borrow $3,200 at 11 2/3% interest. Jennifer plans to repay the loan on January 5. Assume the loan is on ordinary interest (ordinary interest uses 360 days a year). Solving for: 1. interest Jennifer will owe on January 5 2. the...

*February 16, 2012*

**math/calc**

find y'' if x^4+y^4=16

*February 15, 2012*

**math/Calc**

g(x)={1+cos(pi/2-x/1) 0 for-2 <or= x <or=2 for x<2 or x>2 is g(x) continuous at x=2 is it differentiable at x=2? ex[lain in detail I'm very confused as to how to solve this problem

*February 9, 2012*

**math 205**

the product of 3 and y is less than or equal to the sum of y and 6

*February 2, 2012*

**math/calculus**

Find f’’(x) if f(x)=(6^x^2+3)

*January 19, 2012*

**math/calculus**

Find f’’(x) if f(x)=(6^x^2+3)

*January 19, 2012*

**math/calculus**

Find f’’(x) if f(x)=(6^x^2+3)

*January 19, 2012*

**pennfoster**

B.We helped Joan to pack her things.

*January 19, 2012*

**math/calculus**

f(x)=the squareroot of (x^2-9) and g(x)=1/x-4 find the domain and range of f(g(x)) anf f(f(x))

*January 10, 2012*

**math/calculus**

find the domain and range of the function f(x)=x^2-9/4x^2+x

*January 10, 2012*

**MATH**

MARY SAYS THAT THE GREATER THE NUMBER OF COUNTERS, THE GREATER THE NUMER OF DIFFERENT ARRAYS YOU CAN FORM. GIVE AN EXAMPLE THAT SHOWS THAT MARY IS WRONG.

*January 5, 2012*

**MATH**

MARY SAYS THAT THE GREATER THE NUMBER OF COUNTERS, THE GREATER THE NUMER OF DIFFERENT ARRAYS YOU CAN FORM. GIVE AN EXAMPLE THAT SHOWS THAT MARY IS WRONG.

*January 5, 2012*

**statistics**

The abc shoe factory manufactures shoes 24 hours a day. the workers produce 50,000 shoes every 2.3 days How many hours does it take to produce 50,000 shoes

*January 3, 2012*

**math/calculus**

f(x)= the absolute value of x^2-6x-7 a) Find a piecewise defined function that has no absolute value involved b) Let g(x)=f(x) for x is greater than or equal to 7 find an expression of g^-1(x) c. give the domain and range of g^-1(x)

*January 2, 2012*

**math/calculus**

let f(x)=ln(x)x>0 let k(x)= f(g(x)) and m(x)= f(g(x)) a) Find the domain of the function K(x). b) Find the domain of the function M(x). c) Find the value of k'(5)

*January 2, 2012*

**math/calculus**

lim as x->+1 x^3 -1/x^2 -1 lim as x->-1 x^3 -1/x^2 -1 lim as x->1 x^3 -1/x^2 -1

*January 2, 2012*

**College Algebra**

The function H(x) = 2.75x + 71.48 can be used to predict the height in cm of a woman whose humerus is "x" cm long. Predict the height of a woman whose humerus is 34 cm long?

*December 31, 2011*

**math/calculus**

find f"(x) if f(x)= cube root(x^2-2x+1)

*December 20, 2011*

**math/ calculus**

full work out with explanation of this problem please we're working with derivatives and i don't understand it given h(x)= cotx/x find h'(pi/2)

*December 20, 2011*

**math/ calculus**

its like a sub three times the squareroot of x^2-2x+1

*December 19, 2011*

**math/ calculus**

find f''(x) if f(x)= 3(ãx2-2x+1)

*December 19, 2011*

**math/calculus**

given h(x)= cotx/x find h'(ð /2)

*December 19, 2011*

**math/ calculus**

given h(x)= cotx/x find h'(ð/2)

*December 15, 2011*

**Physics**

The drawing shows an ideal gas confined to a cylinder by a massless piston that is attached to an ideal spring. Outside the cylinder is a vacuum. The cross-sectional area of the piston is A = 2.50 10-3 m2. The initial pressure, volume, and temperature of the gas are, ...

*November 16, 2011*

**statistics**

Hi there, I need help with the quialitive summary paper. My subject is on elder abuse.

*November 16, 2011*

**math**

joe left a campsite on a trip down the river in a canoe, traveling a 6 km/h. four hours later, joe's father set out after him in a motorboat. The motrboat traveled at 30 km/h. how long after joe's father started did he overtake the canoe? how far had joe traveled down ...

*November 15, 2011*

**math**

a train left podunk and traveled north at 75 km/h. two hours later, another train left podunk and traveled in the same direction at 100 km/h. how many hours had the first train traveled when they were 1420 km apart?

*November 15, 2011*

**computer**

Which type of graphics file format keeps track of each individual point in the immage? a) bitmap b) detailed image c)pointilated D) vector.....

*November 9, 2011*

**Chemistry**

My mobile phase for HPLC (High Performance Liquid Chromatography) test consists of 3 components in the ratio 5:250:745. In preparing the mobile phase, is it advisable to first measure 745ml of component A, followed by 250ml of component B and lastly 5ml of component C?

*November 3, 2011*

**math**

Howard leaves the dock and sails 2.5miles west He turns south and sails 3.5 Then he turns east and sails 2.5 miles In what direction should howard turn if he wants to use the most direct route to return to the dock ? If Howard use this route ,how many miles will he hv sailed ...

*November 2, 2011*

**Chemistry**

Hi, I have a question on column length for HPLC (high performance liquid chromatography). If the column length is increased,eg from 100mm to 150mm and all other column parameters e.g. particle size of stationary phase, internal diameter..etc.remain the same, how does it affect...

*October 20, 2011*

**Arts/230**

Social views and patterns are often protrayed in art. How did the rising middle-class of the enlightenment era play into the context of their painting? Did it contribute to or detract from the technical qualities of the paintings?

*October 9, 2011*

**Chemistry-help needed**

Posted by angie on Saturday, October 8, 2011 at 6:02am. I have a method using HPLC (high performance liquid chromatography). It states that a 4.6 x 150mm,3um column should be used. (stationary phase : octadecylsilyl silica gel). I have a 4.6 x 100mm,2.7um column, silica-based...

*October 8, 2011*

**Chemistry-thanks**

I have a method using HPLC (high performance liquid chromatography). It states that a 4.6 x 150mm,3um column should be used. (stationary phase : octadecylsilyl silica gel). I have a 4.6 x 100mm,2.7um column, silica-based, bonded-phase (non-polar) column. Can you advise if ...

*October 8, 2011*

**math (please help)**

Let r= 3-3 sin θ How do I test for symmetry θ = π/2?

*October 5, 2011*

**Chemistry**

Is there a formula used to calculate this problem, or should I only look at the table in my book?

*October 4, 2011*

**business communications**

when you are writing subject lines for negative messages to peers and subordinates: a) put the topic, but not your action on it, in the subject line. b)put the topic, including your action on it, in the subject line. c)do not include the topic on the subject line. d)describe ...

*September 28, 2011*

**General-English**

Posted by angie on Sunday, September 25, 2011 at 4:48pm. Is the change in trade name of a material considered a "like-for-like" change? General-English - Ms. Sue, Sunday, September 25, 2011 at 4:52pm Please explain what you mean by a "like-for-like" change ...

*September 25, 2011*

**General-English**

Is it an equivalent (i.e. identical?"? For example, if I change an old piece of equipment with a new piece which has exactly the same specifications as the old one, then it is an equivalent change. In this case, I think it is not an equivalent change?

*September 25, 2011*

**General-English**

Is the change in trade name of a material considered a "like-for-like" change?

*September 25, 2011*

**physics**

if two lighting volts heat exactly same place at the same time in are frame of ref,it is possible that observes in other frames will see the volts heating at def. time or diff. places? explain

*September 25, 2011*

**physical science**

if two lighting volts heat exactly they same place at they same time in are frame of ref.,it is possible that observed in other frames will see the volts heating at diff. time r at diff. places????? explain.

*September 25, 2011*

**geometry**

U=(a,b,c,d,e,f,g,h,i,j,k) A=(a,c,d,f,g,i) B=(b,c,d,f,g) C=(a,b,f,i,j) Determine the following A'square B'

*September 22, 2011*

**physics**

A particle travels along a straight line with a speed = (0.50 -7 ), where is in seconds. Determine the acceleration of the particle when = 2 .

*September 19, 2011*

**DRAMA**

Thanks

*September 18, 2011*

**DRAMA**

One difference between tragedy and comedy is that tragedy A. uses supernatuarl elements B. usually features an extraodinary hero. C.makes us laugh at ourselves,not others. D. uses metaphors and analogy to make its point

*September 18, 2011*

**The Short Story Part 2**

Thank You

*September 17, 2011*

**The Short Story Part 2**

In a "Pair of Silk Stockings",the silk stockings are a symbol of? A.Mrs. Sommers's inability to handle money. B.Mrs. Sommers's lack of concern for her children. C.Mrs. Sommers's selfish needs. D.Mrs. Sommers's desire for attention.

*September 17, 2011*

**chemistry**

How many grams of Cu(OH)2 can be produced from the reaction of 0.500g Cu with 30.0 mL of 3.0M NaOH? Which reactant is the limiting reagent?

*September 14, 2011*

**Math**

Water covers approximately 11,800 mi squared of Florida, which is about 18% of Florida's area. What is the total area of Florida to the nearest thousand square miles?

*September 14, 2011*

**statistics**

128

*August 25, 2011*

**algebra**

jim bought a pair of shoes for $50 and laces for $1. if the sales tax is $7, how much tax must he pay?

*August 17, 2011*

**math**

A separate blueprint for the ramp uses a scale of 1cm : 25cm. The height of the ramp on the blueprint is___ cm.

*August 11, 2011*

**pre algreba**

7-3 (x-5) thxs

*July 13, 2011*

**pre algreba**

7-3 (x-5) thxs

*July 13, 2011*

**math**

7x+4=2x+7

*July 11, 2011*

**accounting**

Paid 55.00for landscaping property. Used cash. Journalize

*May 29, 2011*

**Chemistry**

Which equation shows conservation of mass and charge? A.NH4Br → NH3 + Br2 B. 2Mg + Fe3+ → Mg2+ + 3Fe C. H2SO4 + LiOH → Li2SO4 + H2O D. Cu + 2Ag+ → Cu2+ + 2Ag It's either b or d, since they both have two elements with an oxidation number of 0. Which ...

*May 21, 2011*

**sociology**

Which sociological perspective holds the view that people create their social worlds through interaction and manipulation of symbols? (Points : 1) functionalist conflict interactionist global

*May 15, 2011*

**University Calculus**

Set up (do not evaluate) the integral that gives the surface area of the surface generated by rotating the curve y=tanhx on the interval (0, 1) around the x-axis. Anyone who can help? Not really sure how to even begin! Thanks

*May 13, 2011*

**Math**

If a pizza with a diameter of 12 inches costs $10.99 , based on area, how much should a 15 inch pizza cost?

*May 8, 2011*

**english**

1. Select the sentence that is punctuated correctly. (Points : 1) Paloma did not make it to work for, her car broke down on the freeway. Paloma did not make it to work for her car, broke down on the freeway. Paloma did not make it to work, for her car broke down on the freeway.

*April 25, 2011*