Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 53

**physics**

How deep can a snorkel diver dive if the maximum gauge pressure on the thorax cannot exceed 10.9 kPa? Hint: density of seawater = 1.015g/cm3

**chemistry**

The heat of fusion of ice is 6.00 kJ/mol. Find the number of photons of wavelength = 6.42 x 10e-6 m that must be absorbed to melt 2.00 g of ice.

**home economics - PLS help**

Need help with some economics problems and wondering if anyone can help. 1- ) Consider a farmer who has access to a bond market where she can borrow or lend at the interest rate R. Assume also that her money holdings (nominal balances) and the price level stay constant over ti...

**Algebra**

A spherical scoop of vanilla icecream with radius of 2 inches is dropped onto the surface of a dish of hot chocolate sauce. As it melts, the icecream spreads out uniformly forming a cylindrical region 8 inches in radius. Assuming the density of the icecream remains constant, h...

**algebra**

The overnight low temperature was -5 centigrade. If the temperature rose 18 degrees during the following day, what was the number of degrees centigrade in that day's high temperature?

**algebra**

Find the number of degrees in the measure of one of the base angles of an isosceles triangle, if the measure of the vertex angle is 36 degrees less than the sum of the measures of the base angles.

**algebra**

How many cubic feet are inthe volume of a round swimming pool which is 16 feet in diameter and 4 feet deep throughout? Express your answer in tterms of pi.

**algebra**

Six people are going to be seated in a row of 8 chairs. How many different ways may they be seated?

**algebra**

Two runners jog around an oval path at constant rates, but in opposite directions. One runner completes a lap every 10 minutes, and the other does a lap every 12 minutes. how many minutes elapse between consecutive meetings of the runners? Express your answer as a mixed number

**Chemistry**

There are no units after 1.088 in the problem it just says a specific gravity of 1.088 at room temperature.

**Chemistry**

I need help setting up this problem: Ethylene glycol has a specific gravity of 1.1088 at room temperature, What is the volume of 1.00 kg of ethylene glycol? What is the volume of 2.00 lb of ethylene glycol? Using 25 degrees Celsius.

**Physics**

What three things are required to produce voltage? These three things are the fundamentals of how an electrical generator works.

**Algebra1**

The area of a playground is 221 yd2. The width of the playground is 4 yd longer than its length. Find the length and width of the playground. (Hint: Include correct units in your final answer.) (3 points) pleas show me how you got the answer. Thank you:)

**Calculus**

I have a parametrization for a curve.. x = 5 cos t y = 2 sin t I made the graph... its initial point is (3,0), and curves up and to the left. So, I have my points for the graph. How do I come up with the cartesian equation?

**Calculus**

Determine if function is even, odd, or neither... f(x) = secx tanx I understand how to find if its even or odd, but the sec and tan, I dont understand. Can someone help?

**Stats**

Five chips numbered 1-5 are placed in a jar. Two chips are drawn. Let Z= the sum of the numbers. WHat is the expected value of the random variable? I know I have to use E = np Can someone explain?

**probability**

Seven chips labeled A B C D E F and G are placed in a jar. Five chips are drawn at random. Find the probability thatc chips A and B are selected.

**Pre Calc**

I am sorry, base 3.. log base 3 of (2x)

**Pre Calc**

I need to graph the function, y = log(root 3)2x I did...now I need to graph the inverse. What is that?

**Pre Calc**

To find the number of factors of a number, you get the prime factors and add one to each exponent, then multiply all the exponents. I know how to get that, but I am wondering why you add one. Mathmatical explanation? Can anyone help?

**pre calc**

log(x)(1/16) = -4/3 this means... x^(-4/3)= 1/16 so...the -4/3 root of 1/16... I need to get it in simplest form.

**Pre Calc**

ok. I have side A. How do you find angle B?

**Pre Calc**

In triangle ABC, b=14, c=15, and cos a= 3/5. Find a)side a b) Sin B Help please?

**Pre Calc**

how do you find that? I have the angle measurments, but no side lengths. Except for 400..

**Pre Calc**

From 2 points 400 yards apart on the bank of a straight river flowing due south, the bearings of a point on the opposite bank are 148 degrees and 28 degrees. How wide is the river? I am having a hard time understanding how this is set up. Help please?

**Pre Calc**

lim x approaches 0 [1/x *((1/(sqrt(1+x))-1)] It will be easier to understand if you write it out.. How would I algebraically do this? (The answer is -1/2) Help please?

**Pre Calc**

Simplify (n+1)!/(n-1)! Help please?

**Pre Calc**

Find the geometric sequence with t(5)= -2 and t(7)= -8 find a How do I do this?

**Pre Calc**

How do I do this?... Sq Rt[(9*Sq Rt(3x^2))]

**Pre Calc**

For the sequence, write an explicit formula for the nth term. 1/5, 2/7, 3/9, 4/11... I dont know how to start. I have other sequences also, so I need to learn, not just get the answer. Thank You

**Algebra**

I am given an equation.. x^2-y^2-2x-6y = 8 Move things around... (x^2-2x)-(y^2-6y) = 8 I need to find out what kind of graph this makes. How do I do this?

**Pre Calc**

|2t-3| = |2t| - |3t| ( || = Absolute Value) I squared both sides to get... (4t^2)-12t+9 = t^2 Factored to... (t-1)(t-3) = 0 My book says "Empty Set" for the answer. What am I doing wrong?

**Chemistry**

I have 250 grams of Al2(PO4)3 How many moles of Al are there?

**Physics**

An object with a mass of 49 N falls out of a plane going 20.0 m/s at 300 m above the ground. 1)How do I find the time that the object is in the air? 2)The horizontal distance of the object? Could someone help me out?

**English**

I am writing a paper in APA. When I get some info from a website, what do I put in parentheses? I can't find a name.

**English**

When writing a paper in APA, can you copy some exact words from someones website,as long as you site them right afterwards?

**Writing a Paper**

For my paper, I want to write this exact phrase from a book: "Panic attacks are specified periods of sudden onset of intense terror...." This is an exact sentence in a book. I need to site this right after the sentance or group of sentances from this book. How do I d...

**Writing Paper**

I am writing a paper on panic disorder. I want my opening paragraph to show an example of a panic attack. Should I start it with- "Imagine taking a walk on a beautiful summer day....then all of a sudden your heart is racing..ect." I am going to talk about what you wi...

**Writing Paper**

I am writing a paper on Panic Disorder. I need three scholarly journal articles. Im not exactly sure what this is, so can someone help me? Maybe even find me an example of one on panic disorder? Thanks

**US History**

So, Jefferson and Madison founded the Democratic- Republican party, and these are some of their principles?... -Opposed federalissts -Opposed Jay treaty -Supported good relations with France -Strict constitution -Opposed hamiltons principles -Favored low taxes, states rights, ...

**US History**

I have a question on the republican principles applied by Jefferson and Madison during their presidencies. Can someone help me out on what they mean by "republican principles"? thanks

**US History**

What contributions did Adams make to help establish a stable government after the adoption of the constitution? Well, he did not want to support France in the Revolution. Can someone help me out please?

**Physics**

Why is the momentum in a spaceship traveling in space not conserved? Can someone please expain? thanks

**US History**

Evaluate the extent to which the Articles of Confederation were effective in solving the problems that confronted the new nation. After the revolution, this gave the states freedom and independence. There was a comitee of delegates of representatives from each state. Maybe thi...

**US History**

Can you kind of tell me what they are looking for? What the presidents contributed to the constitution?

**US History**

Compare and Contrast the effectiveness of Washington's and Adams' presidencies in obeying and promoting the Constitution during their administrations. Can someone help me out please?

**US history**

What were the French motivations to explore the new world?

**US History**

I have written a small essay on this question: Compare the ways in which religion shaped the development of colonial society in the New England and Chesapeake regions. Here is what I wrote. Could someone read it and tell me if it is correct, and maybe add some comments? please...

**Biology: Evolution**

Scientists suggest that two energy sources, __________ and __________, broke the bonds in the gases in Earth's primitive atmosphere, releasing atoms to form __________. Help! I forgot my book at school! Please!

**Statistics**

If I have 4 standard deviations, how do I find the SD of the distributions of all of them? They are: .15 .16 .14 .15

**History**

1)Why might the US have been concerned early in the war about China's attitude toward US involvenemt on the south side of vietnam? 2) What might have been the effect on the vietnam war if the border of Laos had been closed and N. Vietnam had not been able to operate in the...

**History**

We have to do little projects. I need some ideas, im not very creative. 1)Write the "perfect" forged pass to get back into US History after ditching that class. any ideas?

**History**

Could you say the cold war was like walking on thin ice...they were close to "breaking" through to war? How could I make a good phrase like this? thx

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