Thursday

October 27, 2016
Total # Posts: 4,979

**chemistry**

A 8.75-L container holds a mixture of two gases at 23 °C. The partial pressures of gas A and gas B, respectively, are 0.317 atm and 0.755 atm. If 0.100 mol of a third gas is added with no change in volume or temperature, what will the total pressure become?

*July 20, 2015*

**physics**

nevermind. figured out that the "mass" of the blocks are actually the weight so i unnecessarily multiplied them by 9.8

*July 19, 2015*

**physics**

doing webwork when i came across this question. sure i had it right but apparently im not. The weightless horizontal bar in the figure below is in equilibrium. Scale B reads 4.20 kg (N.B. as you know, the scale should read N, but no one told the manufacturer). The distances in...

*July 19, 2015*

**English**

What rhetorical devices were used in Lester Pearsons address on the inauguration of the national flag? I have found an alloiteration in paragraph 4 "our new flag will fly for the first time" an antithesis in para 5 and an anaphora in para 13? Are these correct?

*July 16, 2015*

**Chemistry**

A sodium hydroxide sample is contaminated with sodium chloride. A 0.240 gram sample of this impure sample is dissolved in water and titrated with 21.50 mL of 0.130 M H2C2O4. Calculate the percent sadium hydroxide in the impure sample [(mass of NaOH in impure sample/mass of ...

*July 15, 2015*

**Chemistry**

What is the octet rule? How does the rule explain the common ion of fluorine and of calcium? The octet rule is when an element contains 8 valence electrons. The rule explains the common ions of fluorine and calcium to show how much is needed to gain/lose electrons to get that ...

*July 9, 2015*

**Physics**

You are watching your friend play hockey. In the course of the game, he strikes the puck in such a way that, when it is at its highest point, it just clears the surrounding 2.96 m high Plexiglas wall that is 14.5 m away. (Ignore any effects due to air resistance.) (a) Find the...

*July 5, 2015*

**physics**

A mass m = 9.0 kg is attached to the lower end of a massless string of length L = 83.0 cm. The upper end of the string is held fixed. Suppose that the mass moves in a circle at constant speed, and that the string makes an angle theta = 21 with the vertical, as shown in the ...

*July 3, 2015*

**Chemistry**

Just kidding. I mean 51.34L?

*June 29, 2015*

**Chemistry**

Does V=188.4 L?

*June 29, 2015*

**Math**

Give the function that describes the sequence. x y 1 1 2 1 3 1 4 1 A. 1/2x B. x C. x exponent 1 D. x exponent 0

*June 26, 2015*

**Math**

If k = 2, which of the following is correct? A.(10k ÷ 2) + 4 ≤ 14 B.8k + 3 = 20 C.k - 13 > -10 D.9k + 15 ≤ 31

*June 26, 2015*

**Amplifiers**

A particular BJT has a base DC current of 1mA and a collector DC current of 10mA . What is the DC beta for this translator?

*June 23, 2015*

**Chemistry**

energy required for ionisation of 0.02 gram atom of magnesium is x Kj .the amount of energy required to ionise 1 atom of magnesium is

*June 5, 2015*

**Social Studies**

HELP ME PLEASE!! Where is your alikeness?

*June 4, 2015*

**Chemistry**

If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately

*May 29, 2015*

**CHEMISTRY**

CHEMICAL KINETICS The rate of reaction 2N₂O5->4NO₂+O₂ can be written in three ways -d[N₂O5]/dt= k[N₂O5] d[NO₂]/dt= k'[N₂O5] d[O₂]/dt =k"[N₂O5] The relationship between k and k' and between k and k" are ?

*May 28, 2015*

**criminal justice**

what are all the procedlural and substantive ways that a prosecutor and a defense attorney can resolve a case before it goes to a grand jury?

*May 25, 2015*

**Language**

Is there any way to add bias to this question? : "How many minutes did you spend doing homework last week?"

*May 24, 2015*

**Economics**

A Cobb-Douglas production function for new company is given by f(x,y) 50x 2 5 y 3 5 where x represents the units of labor and y represents the units of capital. Suppose units of Labor and capital cost $100 and $200 each respectively. If the budget ...

*May 24, 2015*

**finance**

You decide to buy a new home for $101000.00 at 7.5% interest rate. You feel that you can afford $800.00 for a mortgage payment. You make a down payment of $10000.00 How much will you still owe after making payments for one year. Show the mortgage payment schedule with the ...

*May 21, 2015*

**MATH**

HOW IS ONE WHOLE,ONE TENTH,AND ONE HUNDREDTH RELATED ?

*May 19, 2015*

**programming concepts**

i need the pseudocode if someone can help

*May 15, 2015*

**programming concepts**

i need the pseudocode if someone can help

*May 15, 2015*

**programming concepts**

Mr. Jones always gives True/False tests to his class. His tests always have 20 ques- tions. The maximum class size is 35. He needs a program that will calculate the stu- dents’ grades based on the best score. Grade A will range from the best score, to the best score minus...

*May 15, 2015*

**programming concepts**

Mr. Jones always gives True/False tests to his class. His tests always have 20 ques- tions. The maximum class size is 35. He needs a program that will calculate the stu- dents’ grades based on the best score. Grade A will range from the best score, to the best score minus...

*May 15, 2015*

**Math**

Ethan had $8 more than Dakota. Ethan then gave 1/4 of his money to Dakota. The ratio of money Ethan had to the money Dakota had then became 5:7. How much money did Ethan give to Dakota?

*May 15, 2015*

**History**

Thank you !!

*May 14, 2015*

**History **

What was the result of the overthrow of Diem in Vietnam?

*May 14, 2015*

**math**

a cylinder has 2 faces and no edges.

*May 14, 2015*

**History**

No, I wasn't planning on doing that at all haha thank you very much !

*May 14, 2015*

**History **

What caused the French to pull out of Vietnam?

*May 14, 2015*

**Math**

Kelly makes fruit juice each morning. She uses 2 1/3 pints of strawberries and 1 2/5 pints of grapes in her juice. If she doubles her recipe, how many more points of strawberries than pints of grapes will she use?

*May 13, 2015*

**physics**

In a police ballistics test, a 10.0-g bullet moving at 300 m/s is fired into a 1.00-kg block at rest. The bullet goes through the block almost instantaneously and emerges with 50.0% of its original speed. What is the speed of the block just after the bullet emerges

*May 13, 2015*

**Math**

HELP!!!

*May 13, 2015*

**Math**

2. A researcher tagged 40 giant turtles in 2008. In 2009 she returned and captured 50 turtles, 16 of which were tagged. in 2010 she returned again and captured 30 turtles 8 of which were tagged. a: Use a proportion to estimate the turtle population for 2009 b: Use a proportion...

*May 13, 2015*

**physics**

i did not get this . can u do little bit calculations too.

*May 13, 2015*

**physics**

a 4.0-kg block is moving at 5.0 m/s along a horizontal frictionless surface toward an ideal spring that is attached to a wall. After the block collides with the spring, the spring is compressed a maximum distance of 0.68 m. ) Suppose now friction is present and k = 0....

*May 13, 2015*

**Algebra ll**

i need help i have a polynomial f(x) whose coefficeint are real numbers. Find the remaining zeros of f. Degree 3, zeros -4,-2,-i

*May 11, 2015*

**phi 208**

Just War Theory asserts that military intervention

*May 9, 2015*

**Canadian History**

What were aboriginal peoples in Canada thinking and feeling about the nazi soviet pack in 1939? I can't find anything on it. I wanna know what the perspective of an at home aboriginal person was feeling towards the thought of another war? Please help.

*May 8, 2015*

**Chemistry**

Helium is collected over water at 20.°C and 1.16 atm total pressure. What total volume of gas must be collected to obtain 0.597 g of helium? (At 20.°C the vapor pressure of water is 17.5 torr.)

*May 5, 2015*

**Chemistry**

Moles of h2o driven off And convert grams 0.85 to moles

*April 29, 2015*

**Chemistry**

Determine the energy absorbed as two moles of Nitrosyl Chloride are disassociated into nitric oxide and chlorine gas (used bond energies of kJ per mole to determine your net energy released in Joules): 2NOC1(g)-->2NO(g)+C12

*April 28, 2015*

**Chemistry**

Determine the energy absorbed as two moles of Nitrosyl Chloride are disassociated into nitric oxide and chlorine gas (used bond energies of kJ per mole to determine your net energy released in Joules): 2NOC1(g)-->2NO(g)+C12

*April 28, 2015*

**CHemistry**

Given the following information calculate the heat of formation of C2H4. C2H4 + 3 O2 ¡æ 2 CO2 + 2 H2O ¥ÄH¡Æ = -414 kJ/mol C + O2 ¡æ CO2 ¥ÄH¡Æ = -393.5 kJ/mol H2 + ¨ö O2 ¡æ H2O ¥ÄH&...

*April 26, 2015*

**Science**

What are the four flight forces? Give a brief description of each.

*April 21, 2015*

**calc**

integral from 1 to x of (5/(t^3 +3))dt

*April 19, 2015*

**Science**

The current atomic model would be revised if a) better microscopes were being used to study its structure. b) better microscopes are invented in the future. c) new information about an atom's structure is discovered. d) a new element is discovered in the future.

*April 16, 2015*

**AP Chem**

Lead metal is added to a solution of hydrochloric acid. What would be the theoretical cell potential, E°, for the reaction?

*April 13, 2015*

**Applied Chemistry - HELP!**

Make a poster of types of product warning labels. I'm having a hard time looking up types of product warning labels. Please help and please do not just give me Google link to product label for me to look up by myself which I did but I .... having a hard time.

*April 7, 2015*

**History**

canada and around the time of the constitustion act i suppose to start

*April 3, 2015*

**History**

What were three tactics of assimilation used on aboriginals?

*April 3, 2015*

**Accounting**

Paid $1,200 cash to Hilldale Mall for Success Systems' share of mall advertising cost. I need to know the debit and credit.

*April 2, 2015*

**Accounting**

Completed a project for Chang Corporation abd received $3620 cash. I need to know the debit and credit. Thanks

*April 2, 2015*

**math please help**

I need help too

*April 2, 2015*

**Algebra**

For f(x)=(3x^2)+5and g(x)=7x-2, a. Verify: g(x + 2) ≠ g(x) + g(2). b. Find (f – g)(x). c. Using the resulting function in (b), show that (f – g)(2) = f(2) – g(2). (The work should be different for each side of the equation.) d. Is (fg)(0) =(f/g)(0)? ...

*April 2, 2015*

**chemistry**

Calculate the molarity of a solution made by adding 47.2g of NaNO3 to a flask and dissolving it with water to create a total volume of 1.80L .

*April 1, 2015*

**physics**

A 2inch diameter pipe has been chosen to pass 65 GPM. Can this diameter be used for the suction line? If not , what line diameter should be specified?

*March 31, 2015*

**physics**

. An open tank holding 400 cubic foot of air at atmospheric pressure at 70 degrees F and heated to 160 degree F. What is the volume of air that escapes from the tank?

*March 31, 2015*

**physics**

A 25HP electric motor turning a 1800 RPM will produce how many foot pounds of torque?

*March 31, 2015*

**math**

The ratio of Maya’s beads to Kayla’s beads was 12:7. After Maya bought another 28 beads and Kayla gave away 3/2 beads, 5/7 of Kayla’s beads were left. a) How many more beads did Maya have than Kayla in the beginning? b) Find the new ratio of Maya’s beads to...

*March 30, 2015*

**math**

The ratio of Maya’s beads to Kayla’s beads was 12:7. After Maya bought another 28 beads and Kayla gave away 32 beads, 57of Kayla’s beads were left. a) How many more beads did Maya have than Kayla in the beginning? b) Find the new ratio of Maya’s beads to ...

*March 29, 2015*

**calc**

Verify that the function satisfies the three hypotheses of Rolle's Theorem on the given interval. Then find all numbers c that satisfy the conclusion of Rolle's Theorem. (Enter your answers as a comma-separated list.) f(x) = x^3 − x^2 − 12x + 8, [0, 4]

*March 26, 2015*

**Math**

Choose all measurements that are equivalent to 45 meters. a 450 centimeters b 4500 centimeters c 0.045 kilometer d 0.45 kilometer e 4500 millimeters I pick b, d, e is this correct.

*March 26, 2015*

**Math **

What ratio is equivalent to 3/20? a 5 to 100 b 100 to 5 c 140 to 21 d 21 to 140 I picked d is this correct?

*March 26, 2015*

**math is my answer correct**

Is my answer correct?? The function h(t) = 2 + 50t - 1.862t^2, where h(t) is the height in metres and t is the time in seconds, models the height of a golf ball above the planet Mercury's surface during its flight. A) What is the maximum height reached by the ball? I got ...

*March 25, 2015*

**math**

Thank you. I moved the decimal too many places. Thanks again

*March 25, 2015*

**math**

A $300 mountain bike is discounted by 30% and then discounted an additional 10% for shoppers who arrive before 5am. If you go to the store at 4:30 am, how much will you pay? I did 300^30 =90. 300 -90 ==210 ^ 10 =2.10. 210-2.10= 207.90. Is this correct?

*March 25, 2015*

**math**

I get 2,250. Thank you Ms. Sue for making it easy to understand.

*March 24, 2015*

**math**

ted takes out a student loan to pay for his college tuition this year. Find the interest on the loan if he borrowed $2,500 at an annual interest rate of 6% for 15 years. Could someone help step by step, I cant seem to get it. Thank you

*March 24, 2015*

**math**

Ted takes out a student loan to pay for his college tuition this year. Find the interest on the loan if he borrowed $2,500 at an annual interest rate of 6% for 15 years. What is the formula to figure this out ?

*March 23, 2015*

**linear algebra**

Solve using the concept of rank. Is S={−16 −7 −21,2 1 3, 21 9 2} a linearly independent set of vectors in R3? So I know how to find out if this set is linearly indep. But, I don't know how to use row rank to find this out..

*March 23, 2015*

**math**

thank you

*March 23, 2015*

**math**

Tim sells sneakers. He receives $9.75 an hour and 3% commission on sales. One week he works 24 hours and his sales total $1,879.95. What are his total earnings for the week ? Please help

*March 23, 2015*

**science**

is it corrrectr

*March 21, 2015*

**science**

i think its a

*March 21, 2015*

**science**

At 3:15 one afternoon, the temperature over the land reaches its highest value for the day — about 89°F. The temperature over the adjacent water is about 72°F. What would the expected weather conditions be at this time? A. Cloudy skies and a sea breeze B. Clear ...

*March 21, 2015*

**Pre-Algebra**

Equation S: y = x + 9 Equation T: y = 2x + 1 Which of the following steps can be used to find the solution to the set of equations? x = 2x + 1 x + 9 = 2x x + 1 = 2x + 9 x + 9 = 2x + 1

*March 20, 2015*

**Math**

Zain goes swimming. He swims the first length of the pool in 2.5 minutes. The time he takes to swim each length is 10 seconds more than he took to swim the previous length. A. Find the time Zain takes to swim the fifth length. B. Find the time taken for Zain to swim a total of...

*March 19, 2015*

**Math**

A ball is dropped vertically. It reaches a height of 1.6m on the first bounce. The height of each subsequent bounce is 80% of the previous bounce. A. Find the height the ball reaches on the 6th bounce. B. Find the sum of the first seven terms of this sequence.

*March 19, 2015*

**life orientation**

Referee

*March 19, 2015*

**chemistry**

2 NH3 (g) ----> N2 9g) + 3 H2 (g) at equilibrium, [NH3] = 0.0227 M, [N2] = 0.119 M, and [H2] = 0.346 M. Calculate Kc for the reaaction at this temperature

*March 17, 2015*

**computer applications**

John wants to see the formulas he has used in his spreadsheet but he does not want to see the results of the formulas. How does he display his formulas? A. Click on Trace Precedents. B. Click Print Formulas. C. Click on Show Formulas. D. Click Evaluate Formulas from reading my...

*March 16, 2015*

**Physics**

Oops, c should be when cos(kx) = 0, work it out from there.

*March 14, 2015*

**Physics**

a), Just pop 0 into the equation, what are you left with? b) ω is 2pi/T, so pop that into the equation. c) ?? Not sure. I think it's whenever Sin(wt) = 0, so 0, pi, 2pi, 3pi etc. But I think wavelenth is 2pi, so 1/2, 1, 3/2 might be the answer.

*March 14, 2015*

**Maths**

Suppose that the reliability of a HIV test is specified as follows: Of people having HIV, 90% of the test detect the disease but 10% go undetected. Of people free of HIV, 99% of the test are judged HIV–ive but 1% are diagnosed as showing HIV+ive. From a large population ...

*March 14, 2015*

**math**

Robert is replacing sod in two square-shaped areas of his backyard. One side of the first area is 7.5 feet. One side of the other area is 5.7 feet. The sod costs 'y' dollars per square foot. A)Write an expression to show how much Robert will spend on sod. B)If the sod ...

*March 10, 2015*

**math**

In each of the following, relationships among marked angles are given below the figure. Find the measures of the marked angles. b. m(∠AOB ) is 30° less than 2m (∠BOC ) c. m(∠AOB ) – m(∠BOC ) = 50

*March 9, 2015*

**Math**

A flower planter is to be made from landscape ties that are 4 feet long, four inches high and six inches wide. Each planter is 4 ties high. Describe how to build the planters so that they are square

*March 9, 2015*

**statistics**

In the population, the average IQ is μ = 100 with a standard deviation of σ = 15. A team of scientists wants to test a new medication to see if it has a positive effect on intelligence. A sample of n = 10 participants who have taken the medication has a mean of M = ...

*March 7, 2015*

**Physics**

mass is grams, so 0.016 .. pop that in your formula and you're golden

*March 5, 2015*

**earth**

what is 15 times 12

*March 4, 2015*

**math**

Tony plans to install a window pane that has a length of 8 inches and a width of 6 inches. He decides that the length has to be reduced by z inches. He says that the new area of the window pane will be 48−z. Is Tony correct? Why or why not? THANK YOU!!!!!

*March 3, 2015*

**math**

Janice plans to build a rectangular table top with an area of 60+20r square inches. The width of the table top is 10 inches. What is the length of the table top?. THANK YOU

*March 3, 2015*

**Algebra 2**

Simplify each sum or difference. State any restrictions on the variable. -3x/x^2-9+4/2x-6

*March 3, 2015*

**physic**

Question Part Points Submissions Used A hypodermic syringe contains a medicine with the density of water (figure below). The barrel of the syringe has a cross-sectional area of 2.88 10-5 m2. In the absence of a force on the plunger, the pressure everywhere is 1.00 atm. A ...

*March 3, 2015*

**physics**

NEEDS HELP PLEASE!! A 100kg shot putter is putting a shot 4kg. Just before he releases the shot, he is in the air (feet are off the ground). At this instant, the only force he exerts against the shot is an 800N horizontal force directed forward. a-what is his horizontal ...

*March 2, 2015*

**math**

Scale factor of 0.5 inches = 1.5 feet

*March 2, 2015*

**linear**

^ it is an augmented matrix, sorry the formatting is bad.

*March 2, 2015*