Friday
November 21, 2014

# Posts by Joe

Total # Posts: 2,114

Physics
Engr joe
August 31, 2010

Math
.86/1
August 30, 2010

what times on a clock make an acute angle? Is it 2:006:40 1:30 12:50
August 29, 2010

arithmetic
a total of eight pills are on a table. all have the same color and size. however, one is poisonous and weighs a fraction more than the others. a balance scale may be used only two times to determine the heavier pill. seven of the pills must be eaten.
August 29, 2010

Chemistry
August 28, 2010

algebra 1
please explain to me how I work out problems such as "-2-3" to get the correct answer and show the same on a number line
August 26, 2010

math/chem
it is estimated that uranium is relatively common in the earth's crust, occurring in amounts of 4 g/metric ton. a metric ton is 1000kg. at this concentration, what mass of uranium is present in 1.0 mg of earth's crust?
August 23, 2010

economics
What is the opportunity cost (in dollars) to attend an hour-long econ lecture for A \$160,000 per year corporate executive who works 2,000 hours per year?
August 22, 2010

the time hackers
August 16, 2010

Chemistry
Which solution has the higher osmotic pressure, 2 M NaCl or 2 M CaCl2?
July 27, 2010

Chemistry
Which solution has a higher vapor pressure, 1 M NaCl or 1 M glucose(C6H12O6)?
July 27, 2010

accounting
Compute the total, price, and quantity variances for materials and labor. The following direct materials and direct labor data pertain to the operations of Batista Manufacturing Company for the month of August. Costs Quantities Actual labor rate \$13 per hour Actual hours ...
July 27, 2010

accounting
E11-6 The following direct materials and direct labor data pertain to the operations of Batista Manufacturing Company for the month of August.
July 27, 2010

Physics
60.0MW
July 25, 2010

algebra
Thank you.. SO would it be (x-5)(x+5)
July 19, 2010

algebra
July 19, 2010

physics
The answer to question 3 is mass, but I don't know any more of them.
July 13, 2010

IDEA Act
Determine how IDEA 2004 affects diverse learners. I am having troube with this question. Can anyone help me?
July 10, 2010

algebra
Plot (0,3) on the crodinate axes.
July 5, 2010

chemistry
226.1 mm Hg
June 21, 2010

Bio
June 21, 2010

Bio
The ultimate source of the energy in food ___________________ A)is ATP B)is the sun C)is producers D)is plants E)is consumers
June 21, 2010

math
assignment for an art class is to complete 4 projects from a list of 6. how many ways can this be done if the order soes not matter?
June 17, 2010

statistics
There are 120 possible samples of size n=3 which can be drawn from this population of 10 scores: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 Write each sample and calculate its mean
June 15, 2010

english
what is the sypmbol of freedom? is it the white dove? just want to know for my poster im doing
June 13, 2010

history
What were the international consequences of the stock market crash in 1929? How did world leaders respond to the global depression? with what results?
June 7, 2010

History
Thank you sooo much!!
June 5, 2010

History
What social factors contributed to American Imperialism? I have searched and searched and not found anything. If anyone can help me, even with a website I would be grateful. Thanks so much.
June 5, 2010

language
Instructions Using specific references from "In Memoriam" Lyric 56 and from "Tintern Abbey," contrast Tennyson's view of the relationship between man and nature with that of Wordsworth's, demonstrating a comprehensive understanding of the ...
June 2, 2010

language
Poetic diction is used to refer to the linguistic style, the vocabulary, and the metaphors used in the writing of poetry Right? So it wouldnt be that one etheir, So my choices are now between 3 atmosphere 5 none of these But how do i know if it is none of these?
June 2, 2010

Chemistry
If radon-222 has a half-life of 3.8 days, determine how long it takes for only 1/8 of a sample to remain.
June 1, 2010

Spanish 3
I am using "por" correctly in this sentence?: Podré reunirme contigo la semana que viene porque por ese momento tendré más tiempo.
May 27, 2010

Macroeconomics
Suppose the economy has been experiencing zero inflation and five percent unemployment for several years. The government decides to lower the unemployment percentage by generating some inflation. You need to do the following: 1)create a graph showing what the short-run effects...
May 24, 2010

Geometry
Area reqd. = 4.3*4.3 - ¡Çr^2 where r = 2.15 m Area = 3.96214 sq m
May 24, 2010

Algebra
y = mx + c is a line with slope=m and a y-intercept of c. And hence the reqd. line: y= -2x/3 + 2 or 2x+3y=6 Ajit
May 23, 2010

accounting info. systems
The last step in the revenue cycle is cash collections. The accounts receivable department must know when customers pay their invoices, yet segregation of duty controls dictate that the collection and recording functions be kept separate from each other. What is a solution to ...
May 23, 2010

CALCULUS
This is actually a question from co-ordinate geometry. If (x1,y1), (x2,y2) and (x3,y3) are the vertices of a triangle then its area = (1/2))(x1(y2-y3)+x2(y3-y1)+x3(y1-y2)) The co-ordinates of the vertices aren't very clear in your Q but assuming that the three points are...
May 23, 2010

math
Vol. of cylinder = ¡Ç(r^2)h and vol. of hemi-sphere=(¡Çh^3)/12 and hence their ratio = 12(r/h)^2 where r, h are the radius & and the height of the cylinder
May 23, 2010

Math
For a can with both ends closed, Area reqd. = 2¡Çrh + 2¡Çr^2 where r=6,h=4 and assume ¡Ç=22/7, A=2640/7 sq in. If one end of the can is open then A=2¡Çrh + ¡Çr^2 = 264 sq in.
May 23, 2010

math
What is the greatest amount of postage you can not pay using only 7 and 11 cent stamps?
May 23, 2010

physical science
calculate the KE of a 1500 kg. car travelling at 60 km/h
May 19, 2010

physical science
What will the stopping distance be for a 1,000-kg car if -2,000 N of force are applied when the car is traveling 10 m/s?
May 19, 2010

chemistry
A metal pipeline is laid to carry oil 500 miles across desert.Temp @ night is 30 F: during day temp is 130 F? The linear coefficient of thermal expansion of metal is 0.000006, how much expansion and contraction along pipeline must the design engineer plan for.. a. 475 ft b. ...
May 18, 2010

chemistry
A). the process will still be first order, but the rate constant will decrease.
May 16, 2010

math
Nikki cam word process 7 words in 6 seconds. At this rate, how many words can she process in 3 minutes?
May 16, 2010

math
In how many ways can a cashier give change of exactly 60 cents if he has the following coins available? 10 quarters; 10 dimes; 10 nickels
May 16, 2010

IT 210
Generate an object-oriented design for a system that keeps tracks of your CD and DVD collection. · Identify each of the classes, associated data, and operations for the classes. · Generate the pseudocode for each of the classes as demonstrated on p. 251. ·...
May 16, 2010

Economics
A New Hampshire resort offers year-round activities: in winter, skiing and other cold-weather activities; and in summer, golf, tennis, and hiking. The resorts operating costs are essentially the same in winter and summer. Management charges higher nightly rates in the winter, ...
May 16, 2010

Economics
The U.S. cigarette industry has negotiated with Congress and government agencies to settle liability claims against it. Under the proposed settlement, cigarette companies will make fixed annual payments to the government based on their historic market shares. Supposed a ...
May 16, 2010

chemistry
Assume the solution's final volume is 200.0 mL, the density is 1.00 g/mL, and the heat capacity is 4.184 J/gC. Note: Pay attention to significant figures. Do not round until the final answer.) The molar heat of reaction,delta H rxn , for the reaction of Ca(s) + 2H+(aq)->...
May 16, 2010

Chemistry
What catalysts are used to manufacture sulfuric acid and nitric acid?
May 15, 2010

In a triangular prism V=(1/3)x(Base Area)x(Height) To find Base Area in the case of triangular prism we use the formula for area of a triangle that is A=(1/2)x(L+W)
May 15, 2010

math
Suppose that an experiment has five separate mutually exclusive outcomes: A, B, C, D, and E. If the sample space for the experiment is a uniform sample space, what is p(a or e)
May 12, 2010

life science
An organism's ability to maintain steady internal conditions despite changes in its external environment is called biogenesis homeostasis osmosis respiration In an organism, a virus enters, and reproduces within, a(n) host cell infection interferon parasite The theory that...
May 12, 2010

Math
Can someone please condense this expression. I do not know how. 1/2ln(x^2+1)-4ln1/2-1/2[ln(x-4)+lnx]
May 11, 2010

English
What are some good key quotes (about 6-8) for Reverend Hale in The Crucible?
May 10, 2010

math
what is the scientific notation of 1,200,000
May 7, 2010

Science
That is the dental formula of a cow.
May 4, 2010

math
what is a fraction between 1/3 and 2/3?
May 4, 2010

alegbra
cmon u don't need help for this one ! but anyway here is a hint : REPLACE enough said :)
April 29, 2010

Maths
if i understood the question correctly, here is how u do this : percentage = (113/1600)*100 = 7.0625 % 2 decimale places : there is a 2 after the 6, 2<5 thus u don't increment the 6 and the answer is 7.06 %
April 29, 2010

alegbra
true i am sorry for that ! thanks Reiny for correcting :)
April 29, 2010

alegbra
(x-5)(x+19) = x^2 + 14x - 95 second degree equation (y = a*x^2 + b*x +c), must use Delta = b^2 - 4*a*c to solve it *** Solution *** Delta = (14)^2 - 4*(1)*(-95) = 596 > 0 two solutions: x1 = (-b-sqrt(Delta))/(2*a) x2 = (-b+sqrt(Delta))/(2*a) Numeric Application : x1 = -19 ...
April 29, 2010

Calculus
to calculate the max of any function (absolute or relative) u must derivate it and find the value of x that cancels that derivative. for your case, here is the solution : *** Solution *** let's derive f(x): f'(x) = 5 - 5*e^(5x) condition that we impose : f'(x) = 0 ...
April 28, 2010

Hello the 2 variables that u have to conider are the total sales that we will call x in our case, and Kenisha's income that we will call y A) if we translate the first sentence to an equation, we understand that she earns a fixed amount + a percentage on the total sales, ...
April 28, 2010

Math
Right
April 28, 2010

math
A plane that flies 170 miles per hour is flying 510 miles. How long will the trip take?
April 28, 2010

Physics
objects have various reflexion indexes, for a mirror it's close to 1, so this is why it reflects almost everything the law applies for everything, but the reflected ray may be very very weak
April 28, 2010

Science chemistry
.0118 moles benzoin .288 moles HNO3 How do I do the ratio?
April 27, 2010

Science chemistry
Assume 2.5 grams of benzion and 12.0 mL of 15.8 M nitric acid (density = 1.51 g/mL) was used in the experiment . What is the mole to mole ratio of benzion and nitrate ion.
April 27, 2010

Physics
An RC-circuit has a time constant of 6x10-3 seconds. The capacitor stores a maximum energy of 8 J, when charged using a 3-Volt battery. Using the same battery, we want to increase tenfold the amount of stored energy, while keeping the same time constant (to ensure that the ...
April 27, 2010

Physical Science
What are the various properties of a substance that determine its heat capacity?
April 27, 2010

Physical Science
What are the various sources of heat?
April 27, 2010

Math
The mean of a sample of 25 was calculated as xbar = 500. The sample was randomly drawn from a population whose standard deviation is 15. Estimate the population mean with 99% confidence. B.) Repeat part (a) changing the population standard deviation to 30. C.) Repeat part (a) ...
April 27, 2010

college-physics
In a particular region of space, the magnetic and electric fields have energy densities of 0.2 J/m3 and 4 J/m3 , respectively. Calculate the strength of the magnetic and electric fields in this region.
April 26, 2010

science
after spraying crops with ddt for several years, farmers found that populations of insect pests rebounded. one reason was that insects had developed resistance to the insecticide. suggest another reason, based on what you know about populations, pyramids, predators and ...
April 26, 2010

math
Jen and Heather went to lunch. jen had \$8.00 for the bill. Gayle had 3/5 of the bill. how much did Gayle pay.
April 26, 2010

algebra 1
Given the data points (2, 9), (-4, 8), and (7, 3), the relationship shows a direct variation.
April 22, 2010

math
the ratio of girls to boys in the fifth form is 5;4 there are 144 pupils in the fifth form. how many are girls and how many are boys?
April 22, 2010

math
what is the unit rate of 2 for \$4.98
April 20, 2010

I guess you couldn't solve it. Here's how to solve it x^2(3x-8y) =25(-15-32) =-1175
April 20, 2010

chemistry
What volume of .200M NaOH will be required to react completely with 32 mL of .15M HNO3
April 20, 2010

Algebra
THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the ground h(t) of an object thrown vertically from a height of h0 feet, with an initial velocity of v0 feet per second, if there is no air friction and t is the time in seconds sine the object was thrown. A ...
April 19, 2010

Algebra
THe function h(t)=-16t^2+v0t+h0 describes the height in feet above the ground h(t) of an object thrown vertically from a height of h0 feet, with an initial velocity of v0 feet per second, if there is no air friction and t is the time in seconds sine the object was thrown. A ...
April 19, 2010

Economics
In a one-shot game, if your rival advertises and you advertise, he will earn \$7 million and you will earn \$2 million in profits. If neither of you advertise, you will make \$4 million and he will make \$2 million. If you advertise and your rival does not, you will make \$3 ...
April 19, 2010

math
Marissa plans to cut a wire that is 5 feet 3 inches long. How long should each of the cut pieces be if she wants 7 equal pieces of wire? Find the twenty-second term of an arithmetic sequence if the first term is 4 and the common difference is 10. Find the twenty-second term of...
April 19, 2010

math
what is the unit rate of 2 for \$4.98
April 18, 2010

college algebra
x^2+34x+c
April 18, 2010

History
How did human history in North America during the period described in the Prologue differ from the events of Asia, Eurasia, and Europe?
April 17, 2010

math
How do you do this question? A shipment of 25 television sets contains three defective units. In how many ways can a vending company purchase four of these units and receive (a) all good units, (b) two good units, and (c) at least two good units.
April 17, 2010

math
When a soccer ball is kicked with a vertical speed of 25 m/s its height, h metres, after t seconds is given by the equation h=-5t^2+25t a) how long after it is kicked is the soccer ball at a height of 30 m ? b) How long is the soccer ball in the air?
April 15, 2010

Consider the wide spectrum of business organizations, ranging from gigantic corporations to working at home. Describe at least three types of business organizations that you are familiar with or that you would like to know more about. How is each one advantageous to the ...
April 13, 2010

Investments
You are to analyze and compare one company from the holdings to another company that the Fund does not currently own within the same sector. (USB, PNC). Your analysis will include both fundamental and technical analysis. For the fundamental analysis, you are to calculate the ...
April 13, 2010

chemistry
How would one calculate the equilibrium pressure of Sodium bicarbonate and citric acid in water (think Alka Seltzer), reacting in a closed volume. The pressure builds up to a point, where the reaction slows due to pressure build up. How do I calculate the equilibrium pressure ...
April 12, 2010

Pre Calculus
Verify the following identity 2 tan x/1+tan^2 x = sin 2x
April 12, 2010

Anatomy and Physiology
What structure still works to pump out sodium and potassium in while resting to maintain the concentration gradient? a. cell body b. axons c. dendrites d. synapse All of the following are characteristic of the passive potassium channel except _____. a. found on cell body, ...
April 9, 2010

Anatatomy and Physiology
The ability of a specific tissue or organ to respond to the presence of a hormone is dependent on:
April 8, 2010

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