Friday

December 19, 2014

December 19, 2014

Total # Posts: 45

**Physics**

Aqua dude can swim at a speed of 2.0m/s in still water. A river is 48 m wide and has a current of 1.5 m/s [E]. He starts at the Southbank and swims so that he is always headed directly across the river. A) what is Aqua dudes velocity relative to the shore? B) how long does it ...
*November 22, 2014*

**neuroscience**

Second Question: What is the Nernst potential for Cl- in DMEM at 37C?! Check the best option! • 80 mV! • -80 mV! • 61 mV! • -61 mV! Third question: What is the Nernst potential for Na+ in DMEM at 37C?! Check the best option! • 73 mV! • -73 mV! &#...
*January 6, 2014*

**neuroscience**

In a laboratory, scientists often study neurons in isolation, outside of a living creature, in a dish. In this setting, one can have a good deal of control over the local ionic environment in which the cell exists, because we can control the makeup of the solution – the...
*January 6, 2014*

**Chemistry**

Dr. Bob, you are amazing.I was completely stuck. Thank you so much!
*March 8, 2013*

**Chemistry**

The [NaOH] was never given in the question. Only the total mL.
*March 8, 2013*

**Chemistry**

Sorry, I forgot the question. For the following volumes of NaOH added, list the major species present after the OH - reacts completely. I feel like I'm always missing something. For example, I thought (ii) was H2A HA- OH - and H2O,but it was wrong
*March 8, 2013*

**Chemistry**

(ii) between 0 and 100.0 mL NaOH added H2A H2O HA - Na+ A2- OH - (iii) 100.0 mL NaOH added H2A H2O HA - Na+ A2- OH - (iv) between 100.0 mL and 200.0 mL NaOH added H2A H2O HA - Na+ A2- OH - (v) 200.0 mL NaOH added H2A H2O HA - Na+ A2- OH - (vi) after 200.0 mL NaOH added H2A H2O...
*March 8, 2013*

**Chemistry**

Thank you!
*March 7, 2013*

**Chemistry**

When a diprotic acid, H2A, is titrated by NaOH, the protons on the diprotic acid are generally removed one at a time, resulting in a pH curve that has the following generic shape. (a) Notice that the plot has essentially two titration curves. If the first equivalence point ...
*March 7, 2013*

**Chemistry**

never mind, I figured this one out. Thanks!
*March 7, 2013*

**Chemistry**

Find the pH and volume (mL) of 0.447 M HNO3 needed to reach the equivalence point(s) in titrations of each of the following. (a) 2.65 L of 0.0950 M pyridine (C5H5N) pH volume Answer = 563 mL (b) 0.188 L of 0.250 M NH3 pH volume Answer = 105 mL I can't figure out the pHs ...
*March 7, 2013*

**pre-algebra**

Least to greatest. 1/5,4/10,2/4,5/10,4/5
*November 1, 2012*

**physics**

1. A certain projectile is launched with an initial speed v0. At its highest point its speed is v0/6. What was the launch angle? 2. The "hang time" of a punt is measured to be 3.50 s. If the ball was kicked at an angle of 61.0° above the horizontal and was caught...
*October 3, 2012*

**Maths**

2/3 divided by 5 is 2/3 x 1/5 = 2/15. Now Bob eats twice as much as the others, therefore you may view it as if you were to divide something in three parts, Bob eat two of those parts. Final Answer: 2/3 * 2/15 = 4/45 OptimalLearningSolutions @ gmail
*July 23, 2012*

**chemistry**

Determine the theoretical and percent yield of hydrogen gas if 78.5 g water undergoes electrolysis to produce hydrogen and oxygen and 3.63 g hydrogen is collected?
*January 25, 2012*

**The Arithmetic progression?**

The Arithmetic progression?
*January 19, 2012*

**Chemistry**

When sodium Metal is dropped into water, all the metal reacts in the equation shown below. What mass of hydrogen is liberated from a 46.0 gram piece of sodium? 2Na(s)+2H2O(I) > 2NaOH(aq)+H2(g)
*January 13, 2012*

**Chemistry**

0.717 g of a compound containing carbon, hydrogen, and oxygen is burned and found to produce 1.02 g CO2 and 0.624 g H2O. The molar mass of the compound is 124 g/mol. (a) Write a chemical equation for the combustion of this unknown hydrocarbon. (b) Determine the # of g and ...
*August 24, 2011*

**algebra**

Write the slope-intercept equation for the line that passes through(4,3) and has slope 5/4
*November 10, 2010*

**algebra**

Write the slope-intercept equation for the line that passes through(4,3) and has slope 5/4
*November 9, 2010*

**algebra**

thank you, that is actually how the word problem was phrased.
*November 9, 2010*

**algebra**

show the algebraic inequality The profit for a company is determined by the equation y = 0.02x – 0.30, where y represents the profit and x represents the number of items sold. How many items must be sold so that the profit will be at least $4000?
*November 9, 2010*

**algebra**

thank you
*November 8, 2010*

**algebra**

If the first and third of three consecutive odd integers are added, the result is 69 less than five times the second integer. Find all three integers.
*November 8, 2010*

**THANK YOU**

thank you
*November 7, 2010*

**college**

write an equation of the line containing the specified point and perpendicular to the indicated line (-2,-5), x-2y=3
*November 7, 2010*

**algebra**

write an equation of the line containing the specified point and perpendicular to the indicated line (-2,-5), x-2y=3
*November 7, 2010*

**algebra**

how do I write an equation of the line containing the specified point and perpendicular to the indicated line (-2,-5), x-2y=3
*November 7, 2010*

**algebra**

Given the linear equation y=1/3x-3, find the y-coordinates of the points (-6, ), (-3, ), and (6, )
*November 6, 2010*

**algebra**

is (5/6,-2) a solution for -6x-7y=9
*November 5, 2010*

**algebra**

A mountain drops 90 feet over a horizontal distance of 875 feet. What is the slope of the mountain? Round your answer to two decimal places.
*November 4, 2010*

**algebra**

Write the equation for this situation: the value, v, in hundreds of dollars, of Bob’s stamp collection is 12 dollars more than 1/3 of the age, t (in years). Then graph the equation and use the graph to determine the value of Debbie’s coin collection if it is 9 years ...
*November 4, 2010*

**algebra**

would I replace the word "thickness" with 96? 12*8*96 > 72?
*October 30, 2010*

**algebra**

The volume of a rectangular slab of concrete needs to exceed 72 cu. ft. If the length is 12 feet and the width is 8 feet, how thick does the concrete slab need to be?
*October 30, 2010*

**algebra**

Company A charges $55 per day plus $0.35 per mile to rent a car. Company B charges $50 per day plus $0.40 per mile. Jack wants to rent a car for three days. How many miles should Jack be traveling so that Company A is less expensive than Company B?
*October 30, 2010*

**algebra**

n + n + n + 6 = 81 * 2 3n + 6 = 162 - 6 3n = 156 n=156/2 n=78 this isn't right what am I doing wrong?
*October 29, 2010*

**algebra**

ok give me a second or longer, thanks
*October 29, 2010*

**algebra**

familiarize, translate, carry out, check and state
*October 29, 2010*

**algebra**

Use the five steps for problem solving to answer the following question. Please show all of your work. The average of two quiz scores is 81. If one quiz score is six more than the other quiz score, what are the two quiz scores?
*October 29, 2010*

**HEATHCARE**

write a 1-2 page essay explaining how one of the following groups have addressed issues of cost control. healthcare, united states goverment and insurance
*October 11, 2010*

**middle school**

Two news helicopters are flying in the same altitude on the way to a political rally. Helicopter A is due 20 miles west of the rally. Helicopter B is 15 mies south and 15 miles each. How far apart is each helicopter? How far from the rally is each helicopter?
*May 5, 2010*

**flagahan high**

why can small cells exchange substances more readily than large cells?
*February 11, 2010*

**accounts**

IF SOME ONE TAKE LOAN AND STARTED HIS BUSINESS THE journal entrY WILL BE
*January 17, 2010*

**MATH Prob.**

red maedle on the first draw.
*August 12, 2009*

**financial investment homework**

Hi, My name is Franklin. I have a question on financial investment. Sue and Tom Wright are assistant professors at the local university. They each take home about $40,000 per year after taxes. Sue is 37 years of age, and Tom is 35. Their two children, Mike and Karen, are 13 ...
*December 2, 2006*

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