Thursday

August 21, 2014

August 21, 2014

Total # Posts: 47

**Chemistry**

Thank you!
*April 22, 2014*

**Chemistry**

Assuming an efficiency of 38.60%, calculate the actual yield of magnesium nitrate formed from 145.9 g of magnesium and excess copper(II) nitrate. I got 230.5g but it isn't right.. I got 6 mols of Mg then calculated molar mass of Mg(NO3)2 and got 148.31 and then multiplied ...
*April 22, 2014*

**Chemistry**

At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 1.00 kJ·s–1·m–2. If the sunlight consists of photons with an average wavelength of 510.0 nm, how many photons strike a 1.30 ...
*January 30, 2014*

**Math**

Solve the equation for the unknown quantity x. Round to the nearest thousandth if needed. 2x=29
*December 14, 2013*

**Math**

A drug is eliminated from bloodstream exponentially with half life of 48hours. If patient receives initial dose of 15 milligrams at midnight, how much of drug is in patient's blood at noon the next day?
*December 14, 2013*

**Math**

Solve the equation for unknown quantity x. 2x+29
*December 14, 2013*

**Math**

How much energy, in joules, is released by an earthquake of magnitude 3.4?
*December 14, 2013*

**Math**

Initial population of a town is 18,691 and it has a doubling time of 15 years. What will the population be in 4 years?
*December 14, 2013*

**Math**

half life of a drug in the bloodstream is 14 hours. By what factor does the concentration of the drug decrease in 22 hours?
*December 14, 2013*

**Georgia Studies**

Apart from being a dispute over land between the French and British, what are some key elements to the French and Indian War?
*October 28, 2013*

**Physics**

A train with a mass 5x10^5 kg is moving with a speed 80km/hr. If the train stops in 2min...1)What is the acceleration of the train? 2) What is the braking force applied to the train?
*February 4, 2013*

**Accounting**

Q1). As the chief accountant of Breathless Perfume Pty ltd, you discover a significant misstatement that overstated net profit in this year’s financial statements. The misleading financial statements are contained in the company’s annual report, which is about to be ...
*August 19, 2012*

**college physics**

When a projectile lands, the angle made between the projectile and the ground corresponds to which of the following aspects of its motion? a)the direction of the acceleration vector just before impact b)direction of the velocity vector just before impact c)direction of the ...
*April 18, 2012*

**h.s. physics**

Consider a projectile that is thrown upward at an angle between 10 and 80 degrees from the horizontal, when are the acceleration and velocity vectors perpendicular to each other? (Only consider the motion during free fall.) a) nowhere b)at the highest point c)the launch point ...
*April 18, 2012*

**college physics**

When a projectile lands, the angle made between the projectile and the ground corresponds to which of the following aspects of its motion? a)the direction of the acceleration vector just before impact b)direction of the velocity vector just before impact c)direction of the ...
*April 18, 2012*

**college physics**

Consider a projectile that is thrown upward at an angle between 10 and 80 degrees from the horizontal, when are the acceleration and velocity vectors perpendicular to each other? (Only consider the motion during free fall.) a) nowhere b)at the highest point c)the launch point ...
*April 18, 2012*

**Algebra**

Ohh right thank you
*April 16, 2012*

**Algebra**

wait isn't (y^-2)/(y^4)=y^2?
*April 16, 2012*

**Algebra**

Please simplify completely :)
*April 16, 2012*

**Algebra**

(100x^3y^-2)/(64x^7y^4)
*April 16, 2012*

**Geometry**

Marion is observing the launch of a space shuttle from the command center. When she first sees the shuttle, the angle of elevation to it is 16°. Later, the angle of elevation is 74°. If the command center is 1 mi from the launch pad, how far did the shuttle travel ...
*February 23, 2012*

**Geometry**

True or False: An angle of depression can never be more than 90˚.
*February 23, 2012*

**literature**

What are two things that can be a symbol of courage?
*November 8, 2011*

**Music Theory**

Thank you. That helped a lot!
*October 12, 2011*

**Music Theory**

How do you change a natural minor scale to a harmonic minor scale? For example: d harmonic minor
*October 12, 2011*

**Algebra**

Oh I guess it does. Thanks!
*October 12, 2011*

**Algebra**

But that still doesn't work in the equation...does it?
*October 12, 2011*

**Algebra**

No thats what someone else said and it doesn't work!! And I thought -.6 x 2= -1.2 not positive 1.2.
*October 12, 2011*

**Algebra**

Hi this question was already asked but there is still no correct answer. I can't seem to solve this for x correctly...I got 128 over 55 as an answer which can't be correct. Please help me find the correct answer! Thanks The equation is: .05x-.6(x+2)=.08 Please show the...
*October 12, 2011*

**science**

Not really sure I understand the question, but as a substance cools, particles move faster. As a substance heats up, particles move slowly. Sorry if that wasn't your question...
*October 12, 2011*

**Algebra**

That doesn't work because -.6 x 2= -1.2, not positive 1.2. And it still doesn't equal .08 when you plug it in.
*October 12, 2011*

**Algebra**

I can't seem to solve this for x correctly...I got 128 over 55 as an answer which can't be correct. Please help me find the correct answer! Thanks! The equation is: .05x-.6(x+2)=.08 Please show the work as well as the answer. Thanks again.
*October 12, 2011*

**algebra**

If it is 2x, x would be 10. 2x + 16= 36 -16 -16 2x=20 /2 /2 x=10
*October 12, 2011*

**intermediate algebra**

Divide and check: show all work (t4 − 2t2 + 4t − 5) ÷ (t2 − 3)
*October 2, 2011*

**Physics**

A grenade is thrown from a trench that is 10 meters below groud level. The soldier throws the grenade at a velocity of 30 m/s at an angle of 60 degrees above the horizontal. Determine the horizontal distance the grenade will fly before it hits the ground, and the magnitude and...
*September 24, 2011*

**math**

Carbon disulfide is produced by the reaction of carbon and sulfur dioxide. 5C(s) +2 SO2(g) ---------> CS2(g) + 4CO(g) How many moles of CO would be made if you started with 10 moles of C?
*May 25, 2011*

**Chemistry**

1.17 V
*November 15, 2010*

**calculus**

can someone please help me with these 3 questions: 1) Evaluate the limit. lim_(x->infinity) (ln(ln(4 x)))/(4 x) 2)Find y ' and y ". y= ln(5 x)/x^7 3)y =(arctan)(x - sqrt(1+x^2)) for this question i got y = -1/(2(1+x^2))which was wrong. Please and thank you!
*October 29, 2010*

**math**

find equivalent fractions: 6/10, 3/4, 4/12 and 1/5
*December 3, 2009*

**Math**

Sorry that didn't come out clearly. The first part is meant to say Find and then the partial differential dV/dp
*May 17, 2009*

**Math**

Fing (ÝV/Ýp)_T,n given pV = nRT(1 + (B/V) + (C/(V^2)) + (D/(V^3)) ) I know how to do partial differentiation, but I have no idea how to rearrange this for V
*May 17, 2009*

**Math**

dz =(−sinx + 2xy^2)dx +(2x^2 y)dy Integrate the differential to find the function z. Would I say that z was equal to two separate differentials and integrate the first part of the function with respect to x and the second part with respect to y? z = cosx + x^2 y^2 + x^2 ...
*May 17, 2009*

**history**

its B
*April 8, 2009*

**6th grade science**

Continetal Glaciers Smooth the landscape Because The Glaciers melt and it is carried downhill which makes it smooth everything in its path
*January 27, 2009*

**social studies**

Who was an ancient Roman writer and historian who wrote about the great fire in Rome?
*October 17, 2008*

**English**

What is the name of that English tecnique where the authour deliberately associates the name of a character with their personality traits- for example Miss Blissful, who is a happy, serene, 'blissful' character... Kind of like implicit characterisation but its a ...
*April 12, 2007*

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