Saturday

February 13, 2016
Total # Posts: 756

**chemistry**

Could someone please tell me how to solve this problem: A pressure of 25.7 inHg would be how many kilopascals? Could you please list the steps on solving it. Thanks
*November 24, 2011*

**chemistry**

how to solve for a 28.4 L sample of methane gas is heated from 35.0° C to 76.0° C. The initial pressure of the gas is 1.00 atm at 35.0° C. Assuming constant volume, what is the final pressure of the gas? OK, I did the following: P₁ = 28.4 L P₂ = ? T&#...
*November 22, 2011*

**chemistry**

Question: how to solve for a 28.4 L sample of methane gas is heated from 35.0° C to 76.0° C. The initial pressure of the gas is 1.00 atm at 35.0° C. Assuming constant volume, what is the final pressure of the gas? Could someone give me the setup for this? I know I ...
*November 22, 2011*

**chemistry**

A 28.4 L sample of methane gas is heated from 35.0 C to 76.0 C. The initial pressure of the gas is 1.00 atm at 35.0 C. Assuming constant volume, what is the final pressure of the gas
*November 20, 2011*

**physics**

Consider a roller coaster as it travels near the bottom of its track as sketched in the figure below. At this point, the normal force on the roller coaster is three times its weight. If the speed of the roller coaster is 27 m/s, what is the radius of curvature of the track? I ...
*November 1, 2011*

**physics**

In the figure below, m1 = 9.5 kg and m2 = 4.0 kg. The coefficient of static friction between m1 and the horizontal surface is 0.60 while the coefficient of kinetic friction is 0.30.
*October 30, 2011*

**4th grade math**

What is an expanded algorithm? Son doesn't know and didn't bring home his textbook, any ideas?
*October 26, 2011*

**4th grade math**

What is an expanded algorithm? Son doesn't know and didn't bring home his textbook, any ideas?
*October 26, 2011*

**social studies**

Tell your parents why you want to be drug free?
*October 25, 2011*

**english (parts of a sentence)**

Is (the worried lady) in the following sentence the subject or is it a adjective phrase? Gazing over her shoulder, the worried lady called for help. Can (my computer problem)in the following sentence be considered a dependent clause? If not could you explain what it is? Thanks...
*October 21, 2011*

**science**

what you could see at fire station?
*October 13, 2011*

**social studies**

why would 'STOP,DROP and ROLL' be effective to put out a fire?
*October 11, 2011*

**science project**

abbreviation for HOT
*October 5, 2011*

**Science**

6 m/s
*October 2, 2011*

**science**

what we can made out of trees?
*September 27, 2011*

**Physics**

Why would this happen? Aren't the vertical and horizontal components independent of each other thus making the swimmer swimming perpendicular to the shore arrive first at the opposite shore since the vertical component is the largest of the three other swimmers. That's...
*September 21, 2011*

**social studies**

how johnny chapman becomes johnny appleseed
*September 21, 2011*

**6th grade math**

16
*September 18, 2011*

**Chemistry**

If I have a bottle containing 12 ozs (355mls)and the alcohol is 48% by volume, how many mls of alcohol arer in the solution?
*September 17, 2011*

**social studies**

what are needs in our community?what are wants in our community?
*September 14, 2011*

**science**

what we made out of trees?
*September 12, 2011*

**social studies**

what are needs in your home?what are wants in your home?
*September 12, 2011*

**chem**

why is cellulose a tough material? why does cellulose need to be so tough? please help
*September 8, 2011*

**math**

Please help me! f(x)=(x+1)^3-2 1. How do I find the x and y intercepts, if any? 2. Describe the long term behavior of this function. Give the power function that F resembles.
*August 30, 2011*

**englissh**

I Think 16.c (DLL will not directly Communicates with PC's hardware) 17.d 18.c 19.c 20.d plz check it
*August 28, 2011*

**chemistry**

It would be difficult to separate Francium from ores. Francium is on the bottom left of the periodic table, therefore it loses electrons easily making it very difficult to give it the electrons necessary to separate it from ores
*August 25, 2011*

**chemistry**

#1)hydrochloric acid is a relatively strong acid . imagine that HCl is added to a buffer solution containing the weak acid phosphoric acid and a salt a)will HCl react with weak acid (H3PO4), or will it react with the salt (Na2HPO4)? b)one product of this reaction will be a new...
*August 23, 2011*

**history**

what were some social, political, and economic changes resulting from the hundred years war? And how did the war begin?
*August 17, 2011*

**theology**

if there is 4 of something and it is called: "Quadruple" What is the name given to 13 of something; like 4 babies are called: Quadruplets, what are 13 babies called?
*August 15, 2011*

**Math**

How would you do the inverse of this function: -1/7sqrt(16-x^2)? -I know you switch the x and y and solve for y. I keep on getting a weird answer. Help!
*August 10, 2011*

**MATH**

SIMPLIFY: 2+3x10/5x3-9=???
*July 15, 2011*

**MATH **

18 INCHES
*July 15, 2011*

**MATH **

FIND A PERIMETER OF A TRIANGLE WHERE ONE SIDE IS 2 INCHES, ONE SIDE IS 6 INCHES, ANOTHER SIDE IS 10 INCHES???
*July 15, 2011*

**MATH **

FIND THE AREA OF A TRIANGLE IF THE BASE (b) IS 9 INCHES AND THE HEIGHT (h) IS = 12 INCHES???
*July 15, 2011*

**MATH**

IT ONLY SAYS TO SIMPLIFY
*July 15, 2011*

**MATH**

BUT THERE IS NO PARENTHESES MS.?? I'M STUCK
*July 15, 2011*

**MATH**

2+3x10 DIVIDED BY 5x3-9= ????
*July 15, 2011*

**Med terms**

Dailys= Days
*July 12, 2011*

**chemistry**

which of the following is reduced in the reaction: Cu(NO3)2 + Zn --- Zn(NO3)2 + Cu
*July 11, 2011*

**chemistry**

Consider the reaction, C2H4 (g) + H2 (g)- C2H6 (g) where -137kJ of heat is released. How many kilojoules are released when 55.3g of C2H4 reacts?
*July 10, 2011*

**science**

what scientic evidence would you need to seettle the claim that famines are caused more by human than enviromental
*July 4, 2011*

**Chemistry**

A buffer solution is prepared by dissolving 0.400 mol of CH3COOH and 0.200 mol of CH3COONa in 1.00 L of water. 1.00 mL of 10.0 M HCl is added to a 100 mL portion of this solution. What is the final pH of the resulting solution? Ka of CH3COOH = 1.8 x 10¯5
*June 26, 2011*

**Business Math**

Cassandra is repaying an installment loan of $3,500 with 20 equal monthly payments of $196 each. what is the annual percentage rate of the loan?
*June 19, 2011*

**Mathematics for business and Finance**

The Patel family recently purchased a home, taking out a mortgage of $235,000 at 8 1/2% for 25 years. Excluding taxes and insurance, what is the monthly PITI payment of their loan?
*May 27, 2011*

**Chemistry**

HC2H3O2 + CH3(CH2)4OH (H2SO4)=?
*May 8, 2011*

**Physical science**

how can i calculate the number of: 1.molecules in 30g water.2.atoms in 50 dm^3 nitrogen gas.3.nucleons in 10 cm^3 flourine gas?
*May 7, 2011*

**Math(Probability)**

Let X and Y equal the outcomes when two fair six-sided dice are rolled. Let W = X + Y. Assuming independence, find the p.m.f. of W when (a) The first die has three faces numbered 0 and three faces numbered 2, and the second die has its faces numbered 0, 1, 4, 5, 8, and 9. (b...
*April 27, 2011*

**please help` ORGANIC**

synthesize olivetol from benzene
*April 27, 2011*

**science**

how do you make 5-Pentyl-1,3-benzenediol from just benzene? 1.Benzene + Br2 +FeBr3-->Benzene-Br??
*April 26, 2011*

**Physics**

15 cm in front
*April 25, 2011*

**HSM 220 Week 6 Budget Matrix**

Yes you are absolutely correct!
*April 20, 2011*

**Environmental Science**

I have been studying for several hours and am having problems with finding the answer to this question. Can anyone help please? Conservationists argue that watershed protection and other ecological functions of forget are more economically valuable than timber. Timber ...
*April 18, 2011*

**math/algebra**

please show me the mathimatical equation so I can set this up properly: The area of a rectangular patio is 54 sq ft. Find the length and width of the patio (Hint: A=lw)
*April 14, 2011*

**physics**

if you have an element that starts out at 40g and has a half-life of 10 days, you keep it for 30 days- how much doe you end up with? .
*April 7, 2011*

**AP Calculus**

integrate |sint(t^2)| dt with 0<t<3
*April 6, 2011*

**math**

A gun is fired from a bunker of 2m deep with an initial velocity of 500m/s at an angle of pi/6 a) Find the parametric equations of the position of the projectile b) Find the range of the projectile to the nearest meter. c) Find the maximum height of the projectile to the ...
*March 17, 2011*

**statistics**

A 99% confidence interval for population variance is being formulated based on a sample of 16 observations. What are appropriate values for X^2
*March 13, 2011*

**Maths - check please**

if boston is 14 feet above sea level and the ice cap is 680,000 cubic miles of water what impact would boston have?
*March 13, 2011*

**AP Calculus**

An object moves along the x-axis with a velocity of v(t) = sin(pi/3)t for time t greater than or equal to 0. What is the total distance traveled by the object over the time interval 0 less than or equal to t less than or equal to 4?
*March 9, 2011*

**Geometry**

The vertices of ∆GHJ are G(-2,3), and J(1,3). If ∆KLM ≅ ∆GHJ, fing LM.
*March 8, 2011*

**geometry**

what is true about the slopes of two perpendicular lines niether of which is vertical?
*March 8, 2011*

**geometry**

If a triangle side lengths of 12 cm, 35 cm, and 37 cm, what type of angle is it?
*March 8, 2011*

**Bio Medical Science**

What are the differences and similarities of the social structure and family values of persons from Bosnia and persons from Poland?
*February 26, 2011*

**Social Studies**

What are the differences and similarities of the social structure and family values of persons from Bosnia and persons from Poland?
*February 25, 2011*

**physical science**

A student is traveling in a car with a constant velocity has a kinetic energy 1.0 x 10^4 J. What is the speedometer reading of the car in km/h.
*February 20, 2011*

**trig**

From two points each on the opposite sides of a river,the angles of elevations of the top of an 80ft. tree are 60 degree & 30 degree.the points & the tree are in the same straight line,which is perpendicular to the river.how wide is the river?
*February 17, 2011*

**poetry**

whats the meaning of the poem SOMEWHERE TO PARIS BY RICHARD BLANCO?
*February 8, 2011*

**AP Calculus**

Suppose that f(0) = 4 and f'(x)< or equal to 2 for x>0. Apply the MVT to the interval [0 , 3] to prove that f(3) < or equal to 10
*February 8, 2011*

**AP Calculus**

Determine the critical numbers for y=sq root of (x^2 - 2x -15)
*February 8, 2011*

**AP Calculus**

Locate the absolute extrema for f(x) = 3/x-1
*February 8, 2011*

**AP Calculus**

Determine whether Rolle's Theorem is valid f(x) = 3 - |x - 2| for [-1, 5] if so, find c. if not, tell why.
*February 7, 2011*

**math**

The masses of newborn children are normally distributed with a mean of 3.4 kg and a standard deviation of 0.8 kg. A newborn is at risk if the baby'd mass falls in the lowest 4%. These babies have a mass of less than ____?
*January 26, 2011*

**math**

A bag contains 3 red, 5 black and 5 blue marbles. Four marbles are selected at random without replacement: - the probability that all 4 are black? -the probability that exactly two are blue and none are red?
*January 25, 2011*

**PHYSICS**

WHAT IS MAGNITUDE OF NORMAL FORCE IN FIGURE WITH V=+3M/S +10n INSIDE BOX IS 5KG
*January 19, 2011*

**PHYSICS**

WHAT IS MAGNITUDE OF NORMAL FORCE IN FIGURE WITH V=+3M/S +10n INSIDE BOX IS 5KG
*January 19, 2011*

**Finance**

Blue Moon Corporation has one million shares of common stock outstanding. In a typical annual election for the board of directors, shareholders representing 70 percent of the shares outstanding exercise their right to vote. The company has nine members on it board of directors...
*January 10, 2011*

**Finance**

The following stock quotation were recently reported in The Wall Street Journal: 10.3 AT&T T 3.6 21 39.43 0.26 0.1 Boeing BA 1.6 31 88.91 -0.85 -8.7 JohnsJohns JNJ 2.5 16 60.26 -0.08 a. What are the dividend yields on the common stock of AT&T Boeing, and Johnson & Johnson? b. ...
*January 10, 2011*

**Finance**

Hooks Athletics, Inc., has outstanding a preferred stock with a par value of $30 that pays a dividend of $2.50. The preferred stock is redeemable at the option of the stockholder in 10 years at a price equal to $30. The stock may be called for redemption by the company in 15 ...
*January 10, 2011*

**Finance**

Determine the value of a share of DuPont Series A $4.50 cumulative preferred stock, no par, to an investor who requies a 9 percent rate of return on this security. The issue is callable at $120 per share plus accrued dividens. However, the issue is not expected to be called at...
*January 10, 2011*

**calculus**

A particle moves along a horizontal line such that its position s(t) = (t^2e^3t/3)for time t. Find when the particle is at rest.
*January 3, 2011*

**Finance**

What factors limit the use of the fixed-asset turnover ratio in comparative analyses?
*December 15, 2010*

**Finance**

What problems may be indicated by an inventory turnover ratio that is substantially above or below the industry average?
*December 15, 2010*

**Finance**

What problems may be indicated by an average collection period that is substantially above or below the industry average?
*December 15, 2010*

**Finance**

what is the major limitation of the current ratio as a measure of a firm's liquidity? How may this limitation be overcome?
*December 15, 2010*

**AP Calculus**

If the linearization of y= cube root of x at x=64 is used to approximate cube root of 66, what is the percentage error? a) .01% b).04% c).4% d)1% e)4%
*December 14, 2010*

**chem**

For number 2 you just have to make a graph of ln(t) in your x axis and 1-T as your y-axis where the T is temperature in Kelvins. You could get a "linear" equation from the graph (y=mx+b) so you take teh M and set it eqaul to (Ea)/R....and R is 8.314jouls/mole.K and ...
*December 8, 2010*

**7th grade**

Sandy works at a clothing store. She makes $8 per hour plus earns 10% commission on her sales. She worked 74 hours over the last two weeks and had a total of $1,580 in sales before taxes.
*December 7, 2010*

**Chemistry**

what is the outer energy level for beryllium?
*November 30, 2010*

**Chemistry**

how does the outer energy level relate to the ionization energy?
*November 30, 2010*

**Chemistry**

How does the outer energy level(period)relate to the atomic radius?
*November 30, 2010*

**math**

Sorry guys, new to this and just realized i posted in the wrong place :(
*November 12, 2010*

**math**

My son is doing expanded algorithm and the problem is 23 x17 the problem is there are cubes underneath the problem for him to fill in but ive tried every way I can think of to solve this problem and the answer just doesnt fit into these cubes, any suggestion?
*November 12, 2010*

**8th grade**

15 is the answer and I have a question "if a is not equal to 0, find the intercepts of the graph of y=ax+b in terms of a and b?"
*November 4, 2010*

**Science :)**

A football is kicked from the ground at 27 m/s at an angle of 42 degrees above the horizontal (ground). No one gets in the way until after it hits the ground. Use the value g=9.8 m/s^2. Assuming that the ground is level and that there is negligible air resistance, wind, etc. a...
*October 28, 2010*

**Physics**

A football is kicked from the ground at 27 m/s at an angle of 42 degrees above the horizontal (ground). No one gets in the way until after it hits the ground. Use the value g=9.8 m/s^2. Assuming that the ground is level and that there is negligible air resistance, wind, etc. a...
*October 27, 2010*

**Physics**

A football is kicked from the ground at 27 m/s at an angle of 42 degrees above the horizontal (ground). No one gets in the way until after it hits the ground. Use the value g=9.8 m/s^2. Assuming that the ground is level and that there is negligible air resistance, wind, etc. a...
*October 27, 2010*

**physics**

4. An ice skater pulls three small children, one behind the other, with masses 25kg, 31 kg and 35kg. Assume that the ice is smooth enough to be considered frictionless, determine: a) the total force applied to the train of children if they reach a speed of 3.5m/s from rest in ...
*October 24, 2010*

**calculus **

Evaluate the limit lim sin4x/tan9x x-> 0
*October 21, 2010*