Thursday
April 24, 2014

Posts by Philip


Total # Posts: 46

chemistry 2
I figured it out. Thank you!

chemistry 2
Titration of 50.0 mL of acetic acid reaches equivalence after delivery of 22.5mL of standardized NaOH 0.21 M. What is the initial concentration of acetic acid and what is the pH of the solution? What is the pH at equivalence? What is the pH adition of 20.0 mL of NaOH? What vol...

Math
Yes it did....I kept multiplying 7*6 before I would divide....thanks! Where can I find those additional rules?

Math
Jai what answer did you get when you put the parentheses around 3+4?

Math
Insert parentheses to make the equation true. 14=50-42/3+4*6

Maths
Two aircraft are flying toward each other , both are flying at a spped of 450 mph. With a distance of 45 miles between them, how long will it take before the aircraft meet? The answer is apparently 2 minutes 30 seconds. Though I dont know how this was worked out? Many Thanks

Maths
The answer is apparently 2 minutes and 30 seconds but I cant work out how to figure this out thanks.

Maths
Two aircraft are flying toward each other , both are flying at a spped of 450 mph. With a distance of 45 miles between them, how long will it take before the aircraft meet?

math
Joe says that knowing 2x3 helps him know 4x6 is he right explain

Simplify
Simplify expression tan(-x)csc(x) ??? Cos x -cos x Sin x Sec x -sec x

Calculus
Which is the correct cofunction identity for (tan theta?) A csc(90degrees - theta) B sec (90degrees - theta) C sin (90degrees - theta) D cos (90degrees - theta) E cot (90degrees - theta)

Physics
A certain spring has a spring constant of 165 N/m. A 20kg mass is attached to the end of the spring. While the mass is at the equilibrium position, it is given a velocity of 8m/s downward. What is the total energy of the system, and aacceleration of the system when it is at th...

Economics
A firm uses a single plant with costs C = 160 + 16Q + .1Q2 and faces the price equation P = 96 - .4Q. a. Find the firm’s profit-maximizing price and quantity. What is its profit? b. The firm’s production manager claims that the firm’s average cost of production ...

AP physics
Lucy is using a programmable treadmill. She inputs a top speed into the treadmill and presses "start." The treadmill accelerates from rest at 0.100 m/s2 until it reaches that speed, after which it stays at that constant speed. Later, when she is getting tired, she hi...

Pre-Cal
Find the domain of the function. sqrt of x^2-9

Chemistry
Calculate the amount of heat released in the complete combustion of 8.17 grams of Al to from Al2O3 at 25 celcius and 1 atm. The delta enthalphy change in the heat of formation for Al2O3 = 1676 KJ/mol 4Al(s) + 3O2(g) --> 2Al2O3(s)

Art and Humanities: Twentieth Century and Beyond
Prepare and conduct interviews with two people about their definition of happiness, how they gained this view, and whether they feel happiness is achievable. Choose two people who vary in age and experience. Only one of the subjects can be someone you know well. This is an opp...

physics!
in the frame of the car, the ball comes in with 39 m/s speed, and bounces back at 39 m/s in the other direction. In the observer frame we need to add the 18 m/s relative speed of the car, and get 57 m/s

quantitative decision making
james and john invested ¥700 and ¥300 respectively, at the end the of one year, they divided their profits such that a third of the profit is divided equally for the efforts they have put into the business and the remaining amount of profit is divided in the ratio of t...

quantitative decision making
james and john invested ¥700 and ¥300 respectively, at the end the of one year, they divided their profits such that a third of the profit is divided equally for the efforts they have put into the business and the remaining amount of profit is divided in the ratio of t...

psychology
what are the four goals of psychology and one example for each?

Science
25 mL sample of KNO3 solution was diluted to 1.000x10^3 mL. The concentration of the final solution is .00383 M. Calculate the concentration of the original solution

Science
if 1.2 g of sodium metal is reacted with 2 mL of H20, how many grams of NaOH will be produced

physics
A car starts from rest and accelerates uniformaly at the rate of 0.98m/s in 1hr.what is its final velocity? A car starts from rest and reaches a velocity of 40m/s in 1minutes..(a)what is its acceleration?(b) If its acceleration remains constant,what will its velocity be in 15 ...

physics
A motorist increase speed from rest and in 21s reaches am a speed of 20km/hr.What is (a)the uniform acceleration in ms-2?(b)the distance covered in the time interval?

Bio
im stuck on these questions for my study guide Please help! i dont want links. thanks 1. Which of the follwoing would be an appropriate measure of the phenotypic variation of a trait in a population? a) the mean of the trait in the population b) the standard deviation of the t...

Math
A 1 pound bag of candy containing 502 piecescost 16.8 cents per ounce. What is the cost of 1 piece of candy?

Chemistry
How many moles of ethanol is contained in 250.0 ml of a 1.90M ethanol solution? A. none of these B. 7.60 C. 475 D. 0.475

science
Explain why ionic compounds are formed from the left side of the periodic table reacts with nonmetalfrom the right side.

calculus help please
At the instant when the radius of a cone is 3 inches, the volume of the cone is increasing at the rate of 9 pi or 28.27433388 cubic inches per minute. If the height is always 3 times the radius, find the rate of change of the radius at that instant?

Chemistry
120 * 1.5/3.5 = 51.4 ml

intro business
help serve food

chemistry
Solutions of sodium hydroxide cannot be kept for very long because they absorb carbon dioxide from the air , forming sodium carbonate. the unbalanced equation is NaOH(aq) + CO2(g) = Na2CO3(aq) + H2O(l) calculate the number of grams of carbon dioxide that can be absorbed by com...

Literary Analysis and Composition
thanks for the answers got a B+

spanish
Song title - he drinks tequila she talks dirty in Spanish by Sammy Kershaw and Lorrie Morgan. Available n You Tube

physics
Use the formula for center of mass. (∑ distance * mass) / total mass = center of mass The masses are what each man is holding, the distance is where each man is from some origin. If you set the origin on one of the men, his distance * mass is 0. Since we know the center ...

History
Which of the 1st explorers made one of the 1st maps of the North American coast?

Physics center of gravity
29500

other
The Fan

Calculus (Urgent Help)
Not only that, but you are wrong on number 6. A minimum value of f'(x) at x = c does NOT imply an extreme value, although the reverse is certainly true if the sign changes from - to +. f''(x) could be undefined at f'(c) which would make it a critical value of f...

Writing
What is introduction and how to write it?

ethics
Trends in immigration will continue to shape the face of the United States. What will this face look like in the year 2050? Here are the results of a Google search for US population projection 2050: http://www.google.com/search?q=US+population+projection+2050&rls=com.microsoft...

Math
The Parent group of the local head start promoted recycling in their neighborhood one saturday in march by distributing sets of blue and green recycling bins to grocery shoppers at central market place. Out of the 248 shoppers who stopped by head start's recycling informat...

english- mood/tone
tks a lot

Chemistry.
Please explain how to solve this question, and why you use your method to solve it. I am very very stuck. Gold is present in seawater to the exteen of 0.15mg/ton. Assume the density of the seaswater is 1.03g/mL and determine how many Au atoms could concievably be extracted fro...

Punctuating Sentences check please
what is punctuating sentences?

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