Saturday

May 30, 2015

May 30, 2015

Total # Posts: 1,426

**physics**

An electron has an initial speed of 2.95 × 105 m/s.If it undergoes an acceleration of 2.7 × 1014 m/s^2, how long will it take to reach a speed of 5.94 × 105 m/s?
*May 20, 2014*

**math**

The2010 census shows that the population of New Jersey increased by 4.5%. If the 2010 population was 8,791,894, what was the population in 2000?'
*May 5, 2014*

**Statistics**

σ = sqrt[ P * ( 1 - P ) / n ] = sqrt [(0.8 * 0.2) / 100] = sqrt(0.0016) = 0.04 z = (p - P) / σ = (.73 - .80)/0.04 = -1.75. What type of formula is this problem?
*May 4, 2014*

**Statistics**

I am a big shot research scientist at Washington University where I am using 2ebrafish to study neuronal migration. My graduate students measured 40 fish and found that the mean length of the fish sampled was 3.7 cm with a standard deviation of 0.5 cm. Construct a 95% ...
*May 4, 2014*

**Statistics 220**

suppose 59 cars start at a car race, how many ways can the top car finish the race?
*April 30, 2014*

**chemistry**

Suppose 95.0 mL of HCl gas at 25 ºC and 707 torr is bubbled into 298 mL of pure water. What will be the pH of the resulting solution, assuming all the HCl dissolves in the water?
*April 24, 2014*

**biology**

The two main structures that make up a kidney are the A. hilus and cortex B. cortex and medulla c. renal pelvis and medulla
*April 22, 2014*

**Algebra 2**

Ordered pair is from an inverse variation: (3,1/3) how do I find the constant of variation?
*April 22, 2014*

**Physics**

A lost shipping container is found resting on the ocean floor and completely submerged. The container is 6.0 m long, 2.2 m wide, and 2.3 m high. Salvage experts attach a spherical balloon to the top of the container and inflate it with air pumped down from the surface. When ...
*April 19, 2014*

**Algebra 2**

How do I solve these inequalities: e^3x>e^x-1 -6log (subscript of 4) x > -24 & how do I solve these: 8^x+1=3 e^x+2=50 8logx=16 I really don't understand how to solve these so can someone please explain them to me?
*April 17, 2014*

**Chemistry URGENT**

I need help understanding oxidation I have a problem that states: The proper assignment of oxidation numbers to the elements in the compound LiAsO3 would be: I think the answer is +1 for Li, +3 for As and -2 for O. I think I am confusing oxidation with ionic charge. PLEASE HELP
*April 6, 2014*

**Chemistry URGENT/DR BOB**

Dalton's Law of Partial Pressure consider the following container of helium at 45C. intially the valve is closed. After the valve is opened what is the pressure of the helium gas. your start points are 2.00 atm and 9.00L. after opening the valve you have 3.00 atm and 3.00L...
*April 1, 2014*

**Chemistry URGENT**

consider the following container of helium at 45C. intially the valve is closed. After the valve is opened what is the pressure of the helium gas. your start points are 2.00 atm and 9.00L. after opening you have 3.oo atm and 3.00L. The answer is 2.25 atm what formula did you ...
*April 1, 2014*

**Chemistry URGENT**

Could someone let me know if I have balanced these equations correctly. balanced equation of the reaction of iron and oxygen to produce iron(ii)oxide. 2Fe + O2 = 2FeO Also if the balanced equation of the reaction of iron and oxygen to produce iron(iii)oxide. 4Fe+302 = 2Fe2O3 ...
*March 27, 2014*

**Chemistry URGENT**

I need help balancing a equation for the combustion of cellulose in oxygen to produce carbon dioxide and water vapor. C6H10O5 = 6CO +5H2O I know this is not correct but I don't know what else to do to get this to balance. Thanking you in advance.
*March 27, 2014*

**chemistry**

I do not understand how to right a balanced equation for the combustion of cellulose in oxygen to produce carbon dioxide and water vapor. I know that cellulose is C6H10O5 but I don't understand how to balance. Thanking you in advance for your help.
*March 27, 2014*

**Chemistry**

I am having a hard time figuring out how to write a balanced equation for the reaction of iron and oxygen to produce iron(II) oxide. I also need a balanced equation for the reaction of iron and oxygen to produce iron (III) oxide. I would appreciate any and all help. Thanking ...
*March 27, 2014*

**Chemistry**

220 J to kilojoules 350 kj to calories 97.0 kcal to joules 35.0 cal to kilocalories How do I convert them?
*March 18, 2014*

**algebra**

kaylas cell phone plan as a fixed fee of $45
*March 17, 2014*

**basic college math**

need the answer to track A offers a flat fee of $25 and $.40 per mile. truck b offers a flat fee of $30 and $.25 per mile
*March 16, 2014*

**Chemistry**

How much water can be produced from the complete reaction of 3.64 L of oxygen gas, at STP, with hydrogen gas? Answer in units of g
*March 14, 2014*

**Statistics**

What is 0.095 on the z-score table or where
*March 9, 2014*

**Chemistry**

The pressure on a gas at -58 degrees Celcius is doubled, but its volume is held constant. What will the final temperature be in degrees Celsius?
*March 9, 2014*

**Chemistry**

Before a trip from New York to Boston, the pressure in the automobile tire is 2.1 atm at 280 K. At the end of the trip, the pressure gauge reads 1.88 atm. What is the new Celsius temperature of the air inside the tire?(Assume tires with constant volume). This is how I did it: ...
*March 9, 2014*

**College Chemistry**

Please help me. I have worked on this for 2 days. I don't understand the ratio of this equation.4Na+O2 to 2Na2O. for question: How many grams of Na2O are produced when 81.ograms of Na reacts?
*March 7, 2014*

**English**

What reasons relating to 1984 means the the reality tv show World's stricktest Parents should be banned.
*March 6, 2014*

**Chemistry**

Oh okay, my bad, and thank you for your help
*March 5, 2014*

**Chemistry**

Okay, I understand that part, but if I use P1V1=P2V2, what happens to the temperature that they gave me? What do I do with it?
*March 5, 2014*

**Chemistry**

Why are n and R the same? Isn't n the mol's and R the ideal gas constant?
*March 5, 2014*

**Chemistry**

A gas occupies a volume of .350 L at a temperature of 18.0 degrees Celsius and a pressure of 980.0 torr. What will be the volume of this gas at standard conditions? Please explain how to do it.
*March 5, 2014*

**Chemistry**

Write the reaction for the synthesis of water vapor from hydrogen gas and oxygen gas and balance it. If you used 0.022 mol hydrogen, how many mol of oxygen would you need in order for it to completely react and have no limiting reactant? Can you please explain in detail how to...
*March 5, 2014*

**AP World History**

1.How did the Atlantic Revolutions influence the development of new states and ideologies? 2. Compare the challenges to the 18th century Muslim world and the causes of the Atlantic Revolutions?
*March 4, 2014*

**World History**

1.How did modern states emerge? 2.What challenges confronted the centralization of Muslim states during the 18th century? 3.How did the different Muslim states respond to these challenges? If you can at least tell me where to find it that would be great.
*March 4, 2014*

**Chemistry**

What would be the volume of 5.0 moles of gas at STP? Can you explain how to do it please?
*March 3, 2014*

**Chemistry **

How do you find the [OH-] of a 1x10^-3 M solution of NH4Cl?
*February 20, 2014*

**Chemistry **

If 0.10 mol of Zn(s) is reacted to 150.0 ml of 1M HCl, what is the concentration of Zn+2 in the solution after the reaction is complete? Assume the solid zinc does not affect the volume.
*February 16, 2014*

**Calculus**

isn't it 2cos(x)
*February 13, 2014*

**Calculus**

it asks for h'(0) not h'(2). I got the answer 5 but the key says the answer is 1
*February 13, 2014*

**Calculus**

Let h(x) = 5g(x) - 3x^2 + 2 sin(x) - 7x, and suppose g'(0) = 2, find h'(0)
*February 13, 2014*

**Algebra **

George built a rectangular pen for his rabbit such that the length is 1 ft more than four times the width. If the perimeter is 292 ft, what are the dimensions of the pen?
*February 10, 2014*

**college chemistry**

kilocalories released when 20.0 g of steam condenses at 100 degrees C. and the liquid cools to 0 degrees C.
*February 7, 2014*

**college chemistry**

sorry, Damon. this is a word problem that is on my homework. I think they want to know the kilocalories on this.
*February 4, 2014*

**college chemistry**

to calulate the calories(kcal) in 1/2 cup of soft ice cream that contains 16g carbs, 17g fat, 5g protein. do I multiply 16g x 4 for carbs 17g x 9 for fat 5g x 4 for proteins? then do I do conversion factors for grams to 1/2cup? am I on the right road?
*February 4, 2014*

**college chemistry**

to calulate the calories(kcal) in 1/2 cup of soft ice cream that contains 16g carbs, 17g fat, 5g protein. do I multiply 16g x 4 for carbs 17g x 9 for fat 5g x 4 for proteins? then do I do conversion factors for grams to 1/2cup? am I on the right road?
*February 4, 2014*

**college chemistry**

Ifwater cools to body temp.37 degrees C., how many kilocalories of heat could be transferred to sore muscles?
*February 4, 2014*

**Chemistry**

If 20mL of a 0.100 M NaOH solution are required to titrate 0.25 grams of an unknown acid, what is the equivalent mass of the acid? If the acid actually contains 3 moles of H+ per mole of acid what is the molecular mass of the acid?
*February 4, 2014*

**Physics**

How would the force of gravity between two masses be affected if the separation distance between them were,assume F2 represents the new force and F1 represents the original force.(a)quadruple the original distance F2/F1= also one-half the original distance F2/F1
*February 1, 2014*

**college chemistry**

How many megajoules are released when 9.0 gal of gasoline burns. how do I start to do this problem, and what are the steps to get there. thank you
*February 1, 2014*

**college chemistry**

DrBob222. when you move ice from zero to final T. Do you add 100 cal.?
*January 30, 2014*

**college chemistry**

a 42 piece of ice at 0.0 C is added to a sample of water at 8.0 C. all of the ice melts and the temperature of the water decreases to 0.0 C. how many grams of water were in the sample.
*January 30, 2014*

**chemistry**

a 42 piece of ice at 0.0 C is added to a sample of water at 8.0 C. all of the ice melts and the temperature of the water decreases to 0.0 C. how many grams of water were in the sample.
*January 30, 2014*

**Level 5 Math**

Suppose that one number contains the same digit as another number, but in resverse order. What is true about the difference of the two number?
*January 26, 2014*

**Level 5 Math**

Suppose that one number contains the same digit as another number, but in resverse order. What is true about the difference of the two number?
*January 26, 2014*

**Level 5 Math**

A bag contains 300 marbles, each of the same size, but in six different colours. Suppose there are 50 marbles of each colour. What is the smallest number of marbles I must pick to be absolutely sure that there are 4 marbles of the same colour among the marbles I have picked ...
*January 26, 2014*

**Science**

An object with a mass of 58.2 kg is accelerated by a force of 320 N. What is the acceleration of that object?
*January 10, 2014*

**algebra**

define the operation * as a * b =[a-b]. what s the value of 2* (4*7)?
*January 2, 2014*

**algebra**

when 35 to the 12 power is written in decimal notation, what is in the ones digit?
*January 2, 2014*

**algebra**

the length and width of a rectangle are each increased by 20%. by what percent is the rectangles area increased?
*January 2, 2014*

**Algebra**

if the product xy=28 when y =196 what is the value of x? express answer as a common fraction
*January 2, 2014*

**English**

Huckleberry Finn 1) By Chapter 23, Jim has become the most morally upstanding character in the novel. What are some of the reasons Twain might have done this? A)Twain was insinuating that racism is wrong by having the uneducated, unmannered, simple man turn out to be more ...
*December 2, 2013*

**home work**

what does mrs wishy - washy need to give the animals a bath ?
*November 14, 2013*

**physics**

A charged particle of mass 8.39×10−4 kg starts from rest and accelerates through a potential difference of +25,000 V to reach a speed of 1170 m/s. What is the charge on this particle?
*November 14, 2013*

**Introduction to Computer and Network Hardware**

LAN for local library: benefits,protocol,topology of LANS, elements of a backbone
*October 29, 2013*

**chemistry**

For magnesium, is possible to have a relative atomic mass less than 24 or more than 26? (Yes/No) Explain. I don't think it is but I can't explain it. Thank you
*October 27, 2013*

**Math**

In one revolution a wheel moves forward a distance equal to its circumference. This is because the wheel Always in contact with the floor. 1)A trundle wheel clicks everytime. What is the radius of the wheel I really don't get this question Please Help me Thank you :)
*October 5, 2013*

**math**

2 inces = 5 ft 7.5 inches = x feet x= (5*7.5)/2 x =
*October 1, 2013*

**Math**

11 pieces equal to 1 pie and 3/8 of a pie
*October 1, 2013*

**math**

4(x-18)=x 4x-72=x 3x=72 x=72/3 x=24
*October 1, 2013*

**statistics**

(7.73/SQRT (24) = 1.577879643, next we subtract the data value (70) from the mean (73) as follows (70 – 73 = -3); the values of the two equations are divided as follows (-3/1.577879643 = 1.901285699).
*September 1, 2013*

**auditing**

OK so will post this again!!! PLEASE!!!!! In what respects is estimating risky? Can you give an example. Thanks!
*August 15, 2013*

**auditing**

In what respects is estimating risky? Can you give an example. Thanks!
*August 15, 2013*

**english , reading & writing process**

One of the benefits to highlighting key points is that
*August 9, 2013*

**Finance**

Is a proactive application of cost measurement and corrective actions a realistic approach to minimize variance? Please justify the answer with examples.
*August 8, 2013*

**Finance**

What type of cost measurements best fit in healthcare and which do not? How do cost measurement techniques vary with regard to the operating budget, capital budget, and variance analysis?
*August 8, 2013*

**english , reading & writing process**

One of the benefist to highlighting key pounts is that .
*August 7, 2013*

**english , reading & writing process**

One of the benefist to highlighting key pounts is that .
*August 7, 2013*

**english , reading & writing process**

One of the benefist to highlighting key pounts is that .
*August 7, 2013*

**Health Care**

I cannot figure out the GAAP and the relevance of each GAAP that is being used to create the financial plan for Patton-Fuller Hospital. I did complete the following budget projections necessary to help answer the question Patton-Fuller Community Hospital Statement of Revenue ...
*August 3, 2013*

** Health Care**

What is the GAAP used to create the financial plan for Patton-Fuller Hospital What is the relevance of each GAAP to the financial plan?
*August 2, 2013*

**STATISTICS**

WHAT DOES THE CENTRAL LIMIT THEOREM SAY ABOUT THE TRADITIONAL SAMPLE SIZE THAT SEPARATES A LARGE SAMPLE SIZE FROM A SMALL SAMPLE SIZE?
*July 18, 2013*

**economics**

are there any current subsidy or welfare issues that are being discussed or addressed in parliament or in municipalities
*July 15, 2013*

**economie**

are there any welfare or subsidy payments that šhould be reviewed or added
*July 15, 2013*

**economics**

what are the costs and consequences of providing the subsidies and welfare
*July 15, 2013*

**British Literature**

Yes but i honestly do not understand it.
*July 10, 2013*

**British Literature**

what is the theme of mary, lady chudleight's poem "to the Ladies>" what advice does she give to women
*July 10, 2013*

**bisic gramma**

Which of the following is not a common sentence error
*July 9, 2013*

**Math**

If a man is 8 feet tall. How many meters is he?
*July 2, 2013*

**Science**

What is the Magnitude of a proton with mass 1.67 10-27kg, moving with a speed of 5.70 106m/s
*June 29, 2013*

**English**

How to use a Buffer in a sentence, foe delivering bad news?
*June 22, 2013*

**Calculus**

If an arrow is shot straight up from the surface of the moon with an initial velocity of 100 ft/s, its height in feet after t second is given by s(t)=(100t)−(83/100)(t^2). Use the limit definition of the derivative to find the answers to the following questions. Find the...
*June 8, 2013*

**math**

15 tv were shipped 4 were defective if 2 tv's were random selected compute the possibility of both tv's working and the probability that at least one of the 2 tv does not work
*June 6, 2013*

**math**

Bessy has 6 times as much as Bob, but when each earns $6, Bessy will have 3 times as much money as Bob. How much does each have before and after earning the $6? How do you set up the equation?
*June 3, 2013*

**Statistics**

How do you fine the P-value?
*May 25, 2013*

**chemistry**

Ignoring activities, determine the molar solubility (S) of Zn(CN)2 in a solution with a pH = 3.63. Ksp (Zn(CN)2) = 3.0 × 10-16; Ka (HCN) = 6.2 × 10-10. I'm completely lost help please!
*May 23, 2013*

**Animal Anatomy & Physiology 1**

Which of the following would involve primarily skeletal muscle activity? A. scratching the ear with hind limb B. movement of food down the intestines C. heart pumping blood D. urination
*May 16, 2013*

**Can't find in text book. Anatomy & Physiology 1**

A researcher develops a new drug that kills cells by preventing transcription. The most direct effect of the drug is to prevent cells from? A. making new DNA B. exporting substances to the cytoplasm C. making protein D. breaking down substances in the cytoplasm
*May 16, 2013*

**Please help! Exam Monday! Anatomy & Physiology**

A characteristic of smooth muscle, not seen in skeletal or cardiac muscle, is? A. intercalated disks B. peristalsis C. sarcosomes D. longer, cylindrical myofibrils
*May 16, 2013*

**Please help! Exam Monday! Anatomy & Physiology**

Which of the following is true regarding the spleen? A. the red pulp is made up of phagocytic cells B. the white pulp is made up of phaocytic cells C. the red pulp is clustered around capillaries D. the white pulp is clustered around arterioles
*May 16, 2013*

**Please help! Exam Monday! Anatomy & Physiology**

From the left ventricle, blood flows most directly into which structure? A. aorta B. vena cava C. right ventricle D. left atrium
*May 16, 2013*

**Please help! Taking exam Monday! Anatomy & Physiol**

Nutrients move out of the blood and into the body cells through which blood vessels? A. arteries B. veins C. capillaries D. lymphatic vessels
*May 16, 2013*