Sunday

December 4, 2016
Total # Posts: 474

**physics**

Here were two tricky questions. Please provide steps. Answers are not necessary (since these are practice questions for an exam). 1.) The centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is used in ...

*October 16, 2010*

**calculus**

Find the equation of the tangent line to the graph of f(x)=4x^3-1x^2+1 at x=-2.

*October 12, 2010*

**chemistry**

1,3,4,6

*October 12, 2010*

**math**

what is the dependent variable in math

*October 4, 2010*

**com/155**

include a discussion of sentence variety and the rhythm of the author's writing about Individuals can be denied credit for a number of reasons.

*September 26, 2010*

**physics**

thanks

*September 19, 2010*

**physics**

How do we tell if an object is in free fall?

*September 19, 2010*

**physics**

Here's a physics problem. I don't care about the answer, i just want to know how to do it. don't have to be too detailed.. but i don't really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant acceleration...

*September 18, 2010*

**physics**

Here's a physics problem. I don't care about the answer, i just want to know how to do it. don't have to be too detailed.. but i don't really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant acceleration...

*September 18, 2010*

**physics**

how do i solve for total time? 6.44*2.68?

*September 18, 2010*

**physics**

rewriting this, since it was typed wrong. In reaching her destination, a backpacker walks with an average velocity of 1.34 m/s, due west. This average velocity results because she hikes for 6.44 km with an average velocity of 2.68 m/s, due west, turns around, and hikes with an...

*September 18, 2010*

**physics**

okay. so regarding number 1. I will use the first method. So I will calculate using this formula? x = v0t + 1/2at^2, in which case.. x = 86(1.70) + 1/2(-10)(1.70)^2? I get x, which would be the position.. how do figure out the height over initial velocity? do i plus 0 in for v0?

*September 18, 2010*

**physics**

Here's a physics problem. I don't care about the answer, i just want to know how to do it. don't have to be too detailed.. but i don't really kno how to start this 1.) A model rocket blasts off from the ground rising straight upward with a constant acceleration...

*September 18, 2010*

**com/155**

write a 100- word passage to Susan Anker, the author of the course's textbook, in which you describe five details from her book that are good and five details about the book that are well written. Where can I find Susan Anker's books

*September 10, 2010*

**Math**

having problems with this one: 4 qt 9 pt = ______ pt

*July 30, 2010*

**chemistry**

Q: I just did an online chemisty lab for Oxidation States of Manganese and I'm stuck. I have three test tubes that have been prepared as follows: Tube 1- Starting PH 13.82 2 mL of KMnO4 1 mL of NaOH Tube 2- Starting PH 7 2 mL of KMnO4 Tube 3- Starting PH 0 2 mL of KMnO4 1 ...

*July 27, 2010*

**chemistry**

1.)KMnO4+H2SO4+NaHSO3--> 2.)KMnO4+NaOH+NaHSO3--> 3.)KMnO4+NaHSO3----> Write the net ionic equations for the reactions

*July 26, 2010*

**Maths**

I need help with the following if that's ok? Calculate the discriminant of the quadratic expression 2x 2 + 5x − 2.

*July 12, 2010*

**Algebra**

Dont even know where to start on this one! x +3 - 1/x=0 2a-b =8 3a+2b=5 Please help!!!

*July 7, 2010*

**early american history**

How did capitalism, agriculture, and industrialization contributed to economic development, regional specialization, and social reforms in early american history?

*July 3, 2010*

**TI-83 CALC PROGRAM**

Please can anyone help me with this or any part of it? Be very grateful as left it too late... Write a program for ti-83 calculator which generates and displays integer values for A, B and C between 1 and 10; • requests the student to input the solution to the equation...

*June 14, 2010*

**algebra**

Solve the equation 3X +1 = 5

*June 13, 2010*

**Managerial Economics**

. Remox Corporation is a British firm that sells high-fashion sportswear in the United States. Congress is currently considering the imposition of a protective tariff on imported textiles. Remox is considering the possibility of moving 50 percent of its production to the ...

*April 18, 2010*

**Math**

P(3 correct)= (.25)^3 x (.75)^2 combinations; 5C3= 5!/3!2!= 10 answer is 1/64 x 9/16 x 10 = 90/1024

*April 7, 2010*

**social studies**

Historians have used the terms "robber barons" and "captains of industry" to describe the powerful industrialists of the late 1800's. compare the two points of view reflected by these terms.

*March 24, 2010*

**6th grade - English**

Antonym = opposite meaning of the word

*March 22, 2010*

**english**

How would you like us to help you with this assignment

*March 21, 2010*

**Physics**

The answer 'B' is wrong? But the only difference is direction of field.

*March 20, 2010*

**ap physics**

25521 J

*March 14, 2010*

**Homework**

sheer and horse

*February 3, 2010*

**3rd grade**

cheerios

*February 3, 2010*

**computers**

Saguaro Federal has mainframes for all of its banks and businesses must the company use the Ethernet or Token Ring protocol? Explain your choice why is this choice appropriate?

*February 2, 2010*

**PreCalculus**

A variable star is one whose brightness alternately increases and decreases. For the variable star Delta Cephei, the time between periods of maximum brightness varies by +/- 3.5 magnitude. (a)Find a function that models the brightness of Delta Cephei as a function of time. How...

*December 13, 2009*

**PreCalc**

sorry

*December 8, 2009*

**Jo**

That makes sense but were did you get of 7.9 from. Once I know that I under stand subtracting the period... just don't know were that value came from h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 0 2 4 6 6 3 4

*December 8, 2009*

**PreCalc**

Naturalists find that the populations of some kinds of predatory animals vary periodically. Assume that the population of foxes in a certain forest varies sinusoidally with time. Records started being kept when t = 0 years. A minimum number, 200 foxes, occured when t = 2.9 ...

*December 7, 2009*

**PreCalc**

h t t p : / /w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 0 2 3 0 7 8 3 thats fair but can i ask why you do not perfer to use a formula?

*December 7, 2009*

**PreCalc**

C = 2.9 D = 200 forgot to mention that put I implied that

*December 7, 2009*

**PreCalc**

h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 0 2 2 5 7 6 7 ok this is what i mean. For exmaple take this problem that I asked for help with before Naturalists find that the populations of some kinds of predatory animals vary periodically. ...

*December 7, 2009*

**Pre Calc**

please h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 6 0 2 2 5 7 6 7

*December 7, 2009*

**PreCalc**

y =( (C-A)/2 ) sin( (X - (A - ( (C - A)/2 ) ) )( pi/(C-A) ) ) + (B - ( (B-D)/2 ) How do I rearange this for this equation for the all of the variables including A, B, C, D, X were pi is the greek leter pi if you didn't notice this is the general formula for when you are ...

*December 7, 2009*

**geography**

why would the countryside get smaller, services are declining and also why are the costs expanded.

*November 20, 2009*

**math**

How do I work out Logs on my calculator to do the sum Log6x=0 or Logx64=2. I have a sharp EL-EL531WH Advanced D.A.L. What is x? This is how I work this one out on it, Log2^16=4 I do Log big number 16 /Log small number 2 = 4.

*November 11, 2009*

**math**

significant numbers 2.8723 * 1.6 = 4.59568. Is it 4.6 because it is the smallest number you are multiplying it by in the sum? e.g. 2.8723 has 5 signifigant figures but 1.6 has 2 so the answer has no more than 2.Smallest number of significant figures. With addition is it the ...

*November 11, 2009*

**cjs220**

Identify the bail system beneficiaries

*October 31, 2009*

**math**

how many picometers are there in a kilometre? Is the answer a negative or positive? =10^15 or = 10^-15

*October 12, 2009*

**math**

does 10^3 * 10^2 * 10^4 * 10^3 = 10^12

*October 12, 2009*

**math**

complete the following conversions. 155u to m = *10^-3 1850n to mm = *10^-6 1.68G to M = *10^3 from G to M = *10^3

*October 12, 2009*

**math**

how many picometers are there in a kilometre? The answer is 10^-15 or 10^15? Thanks

*October 12, 2009*

**math**

Write an explanation of the steps you use to convert a measurement in one unit to a measurement in another. 1) How many picometers are there in a kilometre?

*October 12, 2009*

**math**

Dear Bob I don't understand what you mean.

*October 12, 2009*

**math**

I really do not know how to get the answers to these, can you show me on a table form? Thanks 155km to m 2.56Ml to l 155um to mm 1,850nm to mm 1.68Gm to Mm 165pm to nm 2,750u to M 1.5kg to mg I would like to know how to work these out. Thank you

*October 12, 2009*

**physics**

15.97

*October 10, 2009*

**math**

If a vehicle travles with a constant acceleration of 3km/hr for 5 hours, what was its initial velocity if the final velocity was 100km/hr? Can you please show me how to work this out in math terms.Can you explain it to me. thank you so much.

*October 10, 2009*

**math**

If a stone is dropped from rest and falls under gravity with an acceleration of 10m/s2, how long will it take before the stone is travelling at 25m/s? Can you show me how to work this out with math rules. I do not get it. Thanks

*October 10, 2009*

**math**

If a car has an initial velocity of 103m/s and accelerates at 1m/s for 3 seconds, what will its final velocity be? Can you please show me how to work this question out with math answers and explain it to me. Thank you.

*October 10, 2009*

**math**

2,750um to Mm CF=10^12 2,750um=2,750*10^-12 What does CF stand for. small to big you divide, so why don't I divide by 5 lots of 1000. Can you please give me some examples of conversions like this one. Thanks

*October 10, 2009*

**math**

Can you please give me a few different math examples of what you meant when you said - You do not add powers with different exponents, but not powers of different bases. Thank you so much.

*October 10, 2009*

**math**

What is the difference between the constant of proportionality and the mean? Constant and Mean? Thanks

*October 10, 2009*

**math**

would 64974000345 be written 6.4*10^10 or 6.4974*10^10 2) how would you write 7.991*10-10 in scientific notation? 3) does 9.0 have 2 (sf) and 100.0000 have (7sf)?I'm confused about the trailing zeros when it comes to decimal points.These are trailing zeros. 4) What do you ...

*October 9, 2009*

**math**

convert each of the following: . 155km to m . 2.56Ml to l .155uF to mF . 1,850nm to mm . 1.68Gb to Mb . 165pm to nm

*October 9, 2009*

**math**

how many significant figures do the following numbers have? 1)0.023 2) 1000 3) 8120 4) 7.991 * 10^10 5) 0.00390 6) 9.010 * 10-2 7) 9.0 * 10^-3 8) 3.4 *10*4 9) 1090.00010. How is 1090.00010 written in scientific notation?

*October 9, 2009*

**math**

how would I write this in scientific notation 04980000007507 I am getting confused with it all can you help me fine examples with this. thanks also how would I add this up 10^4+10^4+10^3= is it 21000 or 10^11

*October 9, 2009*

**Statistics**

Safety researchers, interested in determining whether the occupancy of a vehicle might be related to the speed at which the vehicle is driven, have observed the following speed (mph) measurements for two random samples of vehicles. Alone With Pass 64 44 50 52 71 54 55 48 67 69...

*October 3, 2009*

**statistics**

For the following data independent samples, could the null hypothesis that the population means are equal be rejected at the 0.05 level? Sample1 Sample2 Sample3 Sample4 15.2 10.2 14.9 11.5 12.2 12.1 13.0 13.1 15.0 8.5 10.8 11.5 14.6 8.1 10.7 6.3 9.7 10.9 13.3 12.0 13.6 10.6 8....

*October 3, 2009*

**chemistry**

Isotonic saline is a 0.9%(g/100ml) solution of salty water. You are asked to make up 2 Litres of isotonic saline. How much salt should you weigh out? Is this right? 0.9g/100ml * 2000ml = 18g of salt should be weighed out.

*September 29, 2009*

**chemistry**

how many holecules are in 1 L of water (assume that the density of water is 1g/ml. I think 1000g/2*1.01 + 16.00g/mol =55.5 mol =55.5moles * 6.02*10^23molecules/mole =3.34 * 10^25 molecules

*September 24, 2009*

**math**

Where is the best place to look up and learn about algebra expressions then turned into equations? thanks

*September 23, 2009*

**math**

what iste geatest common factor of 42 an 63

*September 23, 2009*

**math**

I am having trouble with algerbra. simplifying expressions. e.g. write an equation to represent the following situation. Where is the best place to look this up for a beginner? e.g. N+5=23 T=3H where T represents Tobys weight. The adult weighed three times as much as the child...

*September 23, 2009*

**chemistry**

hi, I have redone this question. Is this right. How many grams of NO2 will be produced when 5.00 moles of NO react? 5 moles of NO2 produces 5 moles of NO (1:1ratio) mass(g) = 5 moles * 46g/mol = 230g

*September 23, 2009*

**math**

write the following in scientific notation: This is what I wrote, am I right? 2.033Km= 2.033 * 10 3 Km 54890W= 5.4890 * 10 4 W 0.073461Kg= 7.3461 * 10 -2Kg 0.00000641172m= 6.41172 * 10-6m 0.3695245454= 3.695245454 * 10-1

*September 22, 2009*

**chemistry**

5 moles of NO2 produces 5 moles of NO (1:1ratio) mass(g) = 5 moles * 46.01g/mol = 230g

*September 22, 2009*

**chemistry**

How many grams of NO2 will be produced when 5.00 moles of NO react? I have 5 moles of NO2 produces 5 moles of NO (1:1ratio) mass (g)=5 moles times 16.02g/mol=80.1g

*September 22, 2009*

**chemistry**

you have a block of ice that weighs 500g. how many CO2 molecules do you have?

*September 22, 2009*

**chemistry**

Why is balanced chemical equation for H2O written 2H2+0>2H20 and not H20>H20?

*September 21, 2009*

**chemistry**

Isotonic saline is often given to patients intravenously to replenish lost fluids. Isotonic saline is a 0.9g/100ml solution of salty water. You are asked to make up 2:1 of isotonic saline. How much salt should you weigh out?

*September 21, 2009*

**chemistry**

Isotonic saline and is often given to patients intravenously to replenish lost fluids. Isotonic saline is a 0.9% 9G/100ml) solution of salty water. You are asked to make up 21 of isotonic saline. How much salt should you weigh out?

*September 21, 2009*

**chemistry**

I am not sure I need help. thanks.

*September 21, 2009*

**chemistry**

if 10 mol of hydrogen reacted with oxygen, what volume of liquid water could be produced?

*September 21, 2009*

**science**

if 10 mol of hydrogen reacted with oxygen what volume of liquid water could be produced

*September 21, 2009*

**Science**

Repeated trials?

*September 15, 2009*

**linking verbs**

David relaxed on the couch after school.

*September 1, 2009*

**macroeconomics**

Assume that the government purchases decrease by 10 billion, with other factors held constant including the price level. Calculate the change in the level of real GDP demanded for each of the following values of the MPC. Then calculate the change if the government, instead of ...

*July 15, 2009*

**accounting**

14. Lear, Inc. has $800,000 in current assets, $350,000 of which are considered permanent current assets. In addition, the firm has $600,000 invested in fixed assets.

*June 28, 2009*

**ACcounting Ethics**

Approaches to Stakeholder Impact Analysis

*June 26, 2009*

**ACcounting Ethics**

3. Did Enron’s directors understand how profits were being made in this segment? Why or why not?

*June 7, 2009*

**pre-calc**

I don't understand how to convert the partial fractions into a system

*May 29, 2009*

**math**

how do u get the volume of a cylinder

*May 26, 2009*

**CRT**

Thank you so much! I got a 100% because of your help. I appreciate it. All of the answers were correct.

*May 7, 2009*

**want to know-math**

Substitution can also involve more complicated problems, like 5x^2 + 2y -6 = y, where y = -1 and x = 4. Just substitute in the same way, placing the value of each variable in place of the letter and simplifying. what dose this ^ mean is it like this 5 * 42 + 2 * -1 - 6

*May 7, 2009*

**3rd grade grammar**

Can you help me write an essay about neighborhood using the preposition there.

*May 4, 2009*

**science**

what are the five properties of equilibrium

*April 21, 2009*

**Math**

yes

*March 21, 2009*

**English**

Can you give me examples of homonym words for first graders?

*March 21, 2009*

**math**

For sum you may see addition, all together, total (there are several ways) For subtraction you could say difference, minus, take away etc..

*March 21, 2009*

**Human Services**

The class will be divided into two clusters for a debate about regulatory issues in health care and human services. The Pro Lobbyists will argue that, through standards and accountability, a highly regulated environment benefits the delivery of health care and human service to...

*March 11, 2009*

**Microeconomics**

Could you find the answers?

*February 13, 2009*

**Finance**

As a lender, state which financial ratios you would use and how you would use them to evaluate a company. Identify the limitations that a banker would have to take into account when evaluating the financial performance of a company.

*February 5, 2009*