Wednesday

November 25, 2015
Total # Posts: 371

**chemistry**

If the temperature of the system PCl5 (g) =PCl3 (s) + Cl2 (g) + 92.5 kj. is increased, predict the direction of th Le Chatelier's shift.
*March 6, 2013*

**chemistry**

The volume occupied by the reaction SiF4(g)+2H2O (g)=SiO2 (s)+4HF (g). is reduced.Predict the direction of shift in the position of equilibrium.Will the shift be in the direction of the more gaseous molecules,or fewer?
*March 6, 2013*

**science**

Describe two differences between xylem and phloem.
*March 6, 2013*

**science**

What happens if water is lost from the leaves faster that it is taken up the roots?
*March 5, 2013*

**Science**

Does all the water which rises up a plant escape through the leaves?
*March 5, 2013*

**maths**

A lighthouse is 9.6 nautical miles from a ship which bears 156 degrees from the lighthouse.How far is the ship east of the lighthouse?Give answer correct to one-tenth of a nautical mile.
*March 3, 2013*

**maths**

The vertical angle of a cone is 110 degree and the diametre of its base is 186mm.What is its height?
*March 3, 2013*

**maths**

A chord subtends an angle of 68 degree at the centre of a circle of radius 200 mm.Find the length of the chord.
*March 3, 2013*

**maths**

The angle between two tangents from a point to a circle is 82 degree.What is the length of one of these tangents if the radius of the circle is 80mm?
*March 3, 2013*

**maths**

A rectangle has sides 170mm and 130mm.What is the angle between the diagonals?
*March 3, 2013*

**Maths**

The diagonals of a rhombus are 320mm and 240mm in length.Find the angles of the rhombus.
*March 3, 2013*

**Maths**

If cos A=3/5 and A is acute,find sin A,tan A,and sec A.
*February 20, 2013*

**Science**

Invent a unit to measure how fast you spend your money
*February 16, 2013*

**Science**

List the types of energy according to the: (a)content/particle arrangement (b)energy changes involved
*February 16, 2013*

**Science**

what is the unit for measuring the speed at which a motor spins?
*February 15, 2013*

**alebra**

the sum of twice a number and 4 less than the number is tha same as the diiference between -36 and the number. What is the number?
*February 15, 2013*

**Language Arts**

a) Simile because it says "like"
*February 6, 2013*

**physics**

What is the apparent weight of a lead brick 2.0 in x 2.0 in x 8.0 in if placed in oil with density p=0.93 g/cm^3 (Ppb=11.4 g/cm^3)(1 in. = 2.54 cm)
*January 21, 2013*

**Physics**

Why does the volume of air bubble increase as it rises toward the surface?
*January 21, 2013*

**health**

HIV kills or damages the body's ________.
*January 13, 2013*

**math**

For the party, 105 re and blue balloons were inflated. There were 3 red balloons for every 2 blue balloons. How many blue balloons are there?
*January 7, 2013*

**statistics**

An organization sends a random sample of surveys to 100,000 people and received 4,781 responses. A) Give a 95% confidence interval for the true proportion of those from their entire mailing list who may donate.
*December 6, 2012*

**chemistry**

What is the molarity of a sulfuric acid solution if 30.00mL of H2SO4 is required to neutralize 0.840g of sodium hydrogen carbonate? H2SO4(aq) + NaHCO3(aq) → Na2SO4(aq) + H2O(l)+ CO 2(aq)
*December 4, 2012*

**biology**

Why is fermentation an important process for some organisms?
*December 3, 2012*

**Physics**

Two resistors of equal resistance are connected in series with each other and are connected to a battery that produces a potential difference of 8 V. If the current is 0.2 A what is the value of each resistance?
*December 2, 2012*

**Maths**

State the x-intercepts of the graph of y=1-x^2
*November 27, 2012*

**Maths**

Point P(-8,-3)and Q(6,9)are joined by a straight line.Find the equation of the line joining the midpoint of PQ to the origin.
*November 27, 2012*

**Maths**

Solve for x,leave your answer in surd form. 2/x+2 + 3/x+1=5
*November 27, 2012*

**Maths**

Given the quadratic function y =3x^2+10x-8 (i)Find the y-intercept. (ii)Find the x-intercept. (iii) Calculate the axis of symmetry. (iv)Find the coordinates of the vertex (v)Sketch the graph of the above function.
*November 27, 2012*

**Chemistry**

Complete and balance the following equations.Identify each type of the reactions. (a) Cr + O2 >Cr2O3: (b)Na2CO3 + Mg3(PO4)2: (c)H3BCO+ H2O> B(OH)3 + CO + H2:
*November 25, 2012*

**chemistry**

Represent this reaction with a balance chemical equation. Solid aluminium hydride is formed by a combination reaction of its two elements.
*November 25, 2012*

**chemistry**

compleat and balance this equation. Na2CO3+Mg3(PO4)2
*November 24, 2012*

**Chemistry**

what is the name of the ions that are formed when the following compounds dissolve in water. (a) BaBr2 (b) (NH4)2CrO4 (c)HBr
*November 23, 2012*

**Agriculture**

Why is there difference in the quality of the poultry products?
*November 23, 2012*

**science**

Represent this reaction with balanced chemical equation. Disilane gas (Si2H6) undergoes combustion to form solid silicon dioxide and water.
*November 23, 2012*

**Science**

A solution of silver nitrate is mixed with a solution of potassium sulphide.Write the molecular,total ionic,and net ionic equations illustrating the reaction.
*November 23, 2012*

**Chemistry**

Based on CaCo3 + 2HCl --> H2O + CO2 + CaCl. How many ml of 1.00 M NaOH should be used in the titration. 25ml of HCL and 750mg of Tums are combined to simulate an upset stomach.
*November 20, 2012*

**Chemistry**

Based on CaCo3 + 2HCl --> H2O + CO2 + CaCl. How many ml of 1.00 M NaOH should be used in the titration. 25ml of HCL and 750mg of Tums are combined to simulate an upset stomach.
*November 20, 2012*

**math**

in the auditorium there are 24 rows of seats. the first second rows have 8 chairs and the third and fourth rows have 10 chairs.if this pattern continues.how many chairs are in the auditorium?
*November 17, 2012*

**Math Word Problem**

Ron is tiling a countertop. He needs to place 54 square tiles in each of 8 rows to cover the counter. He wants to randomly place 8 groups of four blue tiles each and have the rest of the tiles in white. How many white tiles will Ron need?
*November 16, 2012*

**physics**

A large grinding wheel in the shape of a solid cylinder of radius 0.330 m is free to rotate on a frictionless, vertical axle. A constant tangential force of 260 N applied to its edge causes the wheel to have an angular acceleration of 0.795 rad/s2. (a) What is the moment of ...
*November 15, 2012*

**English 8R - Homework Check (plzzzz read)**

hum its rather good a bit rushed with minor grammar issues
*November 4, 2012*

**7th grade science ASAP please!**

ur answers r right
*November 4, 2012*

**Science**

Which of the following represents a decimal system of measurement? 1 quart = 16 fluid ounces 1 mile = 5,280 feet 1 kilometer = 1,000 meters 1 pound = 16 ounces
*October 17, 2012*

**math**

Jsmine has 8 packs of candle wax to make scented candles. Each pack contains 14 ounces of wax.Jasmine uses 7 ounces of wax to make one candle. How many candles can she make?
*September 27, 2012*

**AP Physics C**

A stone is catapulted at time t = 0, with an initial velocity of magnitude 21.5 m/s and at an angle of 35.3° above the horizontal. What are the magnitudes of the (a) horizontal and (b) vertical components of its displacement from the catapult site at t = 1.06 s? Repeat for...
*September 17, 2012*

**math**

each of the natural numbers 2 through 100, inclusive, is factored in its prime factorization. how many factors of 5 are in the collection of factorizations?
*September 12, 2012*

**statics**

A cantilever beam member made from steel with hollow circular cross section experiences an axial load of 300 KN (F1), and a vertical load of 200 kN (F2) as shown in the following figure. The outside diameter of the beam is 50mm and the uniform wall thickness of the cross ...
*August 4, 2012*

**statics and strengths**

A cantilever beam member made from steel with hollow circular cross section experiences an axial load of 300 KN (F1), and a vertical load of 200 kN (F2) as shown in the following figure. The beam is 300mm long and fixed on one end.
*August 4, 2012*

**flvs**

Your teacher has a jar of chocolate candies. For every completed assessment, she gives herself three pieces of chocolate. candies eaten after 67 completed assessments
*July 17, 2012*

**Chemistry**

If 20ml of a 2.0M solution of HCl is diluted to 500mls, what is its new molarity? How do I work this out
*June 13, 2012*

**chemistry**

if 240ml of O2 gas increases pressure from 0.40 atm to 0.80 atm what is the new volume? show all work
*May 16, 2012*

**Chemistry**

A saturated Ni(OH)_2_ can be prepared by dissolving 0.239 mg of Ni(OH)_2_ in water to make 500.0 mL of solution. What is the Ksp for Ni(OH)_2_?
*March 15, 2012*

**calculus**

if f(x) = square root of e^2x +1, then then f'(0) equals what?
*March 6, 2012*

**calculus**

for abs value of x <1, the derivative of y= ln square root 1-x^2 is.....?
*March 6, 2012*

**geo**

a carpenter cut the top section of window frame with a 32 degree angle on each end. The side peices hav an angle of 49 degreese at the top will the side pieces be parallel
*December 1, 2011*

**Geometry**

A(4,1),B (6,3)
*September 20, 2011*

**history**

Abraham Lincoln so far.
*June 14, 2011*

**history**

I need help with making an abc book with letters of the alphabet with most Imprtant people or moment. Please help!
*June 14, 2011*

**U.S. History**

false
*May 25, 2011*

**Civics (The American President Movie)**

how was the system of checks and balances was presented in the American president movie
*May 23, 2011*

**math**

Find the general solution using the method of undetermined coefficients. y''' - 10y'' + 25y' = e^(-x) cos x + e^(5x) + x.
*May 8, 2011*

**physics**

10.6 t/s
*May 7, 2011*

**business communication **

you are in a group that feels very cohesive, so cohesive that it seems to agree readily at every step of a project, without any lengthy discussion or conflict. sometimes you dont agree with decisions, but you do not say anything. which of the following is the MOST probable ...
*April 20, 2011*

**business communication**

What do you think of D?
*April 20, 2011*

**business communication**

that its a group of international business executives so they would have to gather information about this investment if it would be a good choice
*April 20, 2011*

**business communication**

would the sentence "Time is Money!" be a good opening line for a letter urging a group of international business executives to come to an immediate decision about an investment opportunity? a. yes, because then they would realize that a delay could hurt them ...
*April 20, 2011*

**Business Communication**

thank you
*April 20, 2011*

**Business Communication**

Please submit your end-of-year report by December 31 so we can include your accomplishments in our report to the Corporate Offfice due january 20." is it appropriate to give the report due date in this sentence? a. no, ebcause the reader will not believe that the write ...
*April 20, 2011*

**Business Communication**

thank you
*April 20, 2011*

**Business Communication**

You ask for feedback on a proposal and are told "I don't believe your claims. Your facts must be wrong." You are confident that your facts are indeed correct. You should: a. write a memo to the proofreader's supervisor before sending the final proposal b. ...
*April 20, 2011*

**math**

Danish used 9 balls of clay and 16 straws to make a solid pyramid. How many faces does the solid have?
*March 29, 2011*

**Chemisty**

What is the electron dot structure of Ethanol?
*March 22, 2011*

**statistics**

Suppose 10 undergraduate students are selected randomly to be interviewed about credit card usage. Is the selection of 10 studets a binomial experiment? Explain.
*March 16, 2011*

**math 126**

PROBABLITYPROBLEM
*February 28, 2011*

**math 126**

let u={5,10.15.20.25.30.35.40 find a c
*February 6, 2011*

**College Math**

let U = {5,10,15,20,25,30,35,40} find 10,20
*February 5, 2011*

**phi 103**

mrs orlof teaches 2 history classes one in the afternoon and one in the morining yesturday she gave the same test to both classses anyone who failed the test must retake since a greater percentage of students who took the morining test failed the test than student in the ...
*February 1, 2011*

**Algebra**

the measure of the frist angle of a triangle is 10 degrees more than the measure of the second. the measure of the third angle of the triangle is five less than three times the measure of the second. find the measure of the angles of the triangle.
*January 26, 2011*

**Biology**

Explain how negative feedback systems maintain homeostasis in non-stable environments.
*January 25, 2011*

**Biology**

What are 3 components of the regulatory control system of the body?
*January 25, 2011*

**geometry**

A triangle has two angles that have measures of 22.5 degrees and 101 degrees. a. Find the measure of the third angle. b. Classify the triangle by its angle measures.
*January 23, 2011*

**music read**

I need to learn one whole song,I want to do smoke on the water, I need help.
*December 20, 2010*

**chem**

100 grams of sodium phosphate contains how many sodium ions? what is the formula?
*December 16, 2010*

**math**

two runners jog around an oval path at constant rates, but in opposite directions. One runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. How many minutes elapse between consecutive meetings of the runners?Express your answer as a mixed number.
*December 15, 2010*

**Algebra**

how many cubic feet are in the volume of a round swimming pool which is 16 feet in diameter and 4 feet deep throughout?Express your answer in terms of pi.
*December 14, 2010*

**Algebra**

Compute: 7!/6! x 3!2!/(8-1)!. Express answer as acommon fraction.
*December 14, 2010*

**Algebra**

Write the product 35/14x3/125 in scientific notation.
*December 14, 2010*

**algebra**

Six people are going to be seated in a row of 8 chairs. How many different ways may they be seated?
*December 14, 2010*

**algebra**

Two runners jog around an oval path at constant rates, but in opposite directions. One runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. How many minutes lapse between consecutive meetings of the runners? Express your answer as a mixed number.
*December 14, 2010*

**Algebra**

What numeral is in the 100th decimal place in the decimal representation of 6/7?
*December 2, 2010*

**Physics**

140 m/s
*November 10, 2010*

**algebra**

If the sides of a square are lengthend by 7cm, the area becomes 121cm^2. Find the length of a side of the orginal square.
*October 23, 2010*

**Math**

I have a series of questions that I did. They lead up to the last question I can't solve. Could you check my math and help me with the last question? Thanks! a) Let a be the point (2,3). Compute the distance from Origin 0 to A answer: a^2 + b^2 = c^2 3^2 + 2^2 = c^2 c=sqrt...
*October 14, 2010*

**Macroeconomics **

Durring the late 1970's prices quoted in terms of the Israeli currency, the shekel, rose so fast that the grocery stores listed their prices in terms of the U.S. dollar and provided customers with the dollar-shekel conversion tables that they updated daily. Although people...
*October 13, 2010*

**math**

Which figure in the pattern below will have 99 squares? Figure 1 (picture of 1 square) Figure 2 (picture of 3 squares) Figure 3 (picture of 5 squares)
*October 11, 2010*

**math**

Extend the pattern to complete the table Input 1234567 output 1 8 27 ? ? ? ?
*October 11, 2010*

**physics**

Wait disregard that - I am such an idiot right now. (I can't erase the former comments) 1. 3.379 seconds 2. 85.549mph, 137.678kmph, or 38.244mps (meters per second) I was a little braindead before and miscalculated the projection formula by not doubling the gravitational ...
*October 11, 2010*

**physics**

1. 5.714 seconds 2. 50.5mph, 81.27kph, or 22.576mps (meters per second)
*October 11, 2010*

**physics**

1. 5.714 seconds 2. 50.5mph, 81.27kph, or 22.576mps
*October 11, 2010*