Thursday
November 20, 2014

Posts by cory


Total # Posts: 96

Math
In a triangle ABC, with angles A, B, and C and sides AB, BC, and AC, angle B is a right (90°) angle. If the sin of angle A is 0.5 and side BC is 8 inches long, what is the length of side AC?
November 12, 2014

english
thank you
November 4, 2014

english
3.) They are the subject of many stories. Verb= are PN=subject
November 4, 2014

english
ok, thanks. 2.) Now they are famous throughout the world. Verb=are PA=famous
November 4, 2014

english
I have to find the verb and predicate nouns and predicate adjectives. 1.) Their uniforms are a symbol of their authority. Verb=are PN=symbol
November 4, 2014

mat 116
Simplify (2x)^3+2^3x
March 16, 2014

Math
A surveyor, standing 80 ft. from the base of a building, measures the angle of elevation to the top of the building to be 75 degrees. How accurately must the angle be measured for the percentage error in estimating the height of the building to be less than 4%?
October 3, 2013

Math
Use the linear approximation (1+x)^k=1+kx to find an approximation for the function (3+3x)^(1/3) for values of x near zero. Help would be greatly appreciated!
October 3, 2013

chemistry
The volume of a sample of a gas collected over water at 32 Celsius and 752 torr is 627 ml. What will the volume of the gas be when dried and measured at STP? (Vapor pressure of water at 32 Celsius = 35.7 torr)
May 1, 2013

Chemistry
What is the pH of 125 mL of a 1.59 M solution of a monoprotic weak acid, HA (Ka=9.53×10–5), after 29 mL of 0.37 M NaOH is added? I have no Idea how to start this problem and the homework is due tonight, could someone please help me in calculating this? Thanks
March 31, 2013

chemistry
Got the first part. Thanks. I'm still not sure how to convert mols using the balanced equation... sorry, this class got hard really fast.
March 20, 2013

chemistry
How many grams of Mg(OH)2 are needed to neutralize 55 ml of 0.25 M HCl . according to the following reaction. (show all calculations for credit) Mg(OH)2 (aq) + 2HCl(aq) --- MgCl2 (aq) + 2H2O(l)
March 20, 2013

Math
THe ratio of the number of students who own an ipod to those who do not own an ipod is 7 to 8. There are a total of 45 students. How many students in the class do not own an ipod?
February 25, 2013

Math
Scott can travel from Rochester, N.Y., to New York City by bus, train, car, or airplane. He can travel from New York to London, England, by airplane or ship. 1. If Scott must return from London to New York by airplane, and from New York to Rochester by airplane, how many ways ...
February 13, 2013

Math
A quarter is flipped and the outcome is noted. If a head results, then a die is rolled. If a tail results, then the quarter is flipped a second time. 1.What is the probability of obtaining no heads?
February 13, 2013

Physics
Two blocks of lead, one twice as heavy as the other, are both at 50 degrees Celsius. The ratio of internal energy of the heavier block to that of the lighter block is? A)1:2 B)2:1 C)1:1 D)4:1
February 11, 2013

Physics
You throw a 6.2 bowling ball down a bowling alley. The ball is in your hand for a distance of 1.5 meters. Its speed increases from 0 to 16m/s(36mph). How much force did you apply?
December 17, 2012

algebra
Solve by setting up the proper equation to describe the facts given and then carrying out the mathematical calculations to solve for the unknown variable(s). Three times a larger number added to 4 times a smaller number totals 24. When twice the smaller number is subtracted ...
July 9, 2012

algebra
Solve by setting up the proper equation to describe the facts given and then carrying out the mathematical calculations to solve for the unknown variable(s). The difference between two numbers is 3, and the sum of those two numbers is 21. What are the two numbers?
July 7, 2012

helppp pleaseee
How many days on average can you survive without food or H20?
May 7, 2012

personal finance
explain why a savings and loan association that pays a nominal rate of 4.5% interest, compounded daily, actually pays an effective rate of 4.6%.
March 31, 2012

chemistry
If you begin with 0.345 moles of Calcium Nitrate,how many moles of Potassium Phosphate were needed? How many moles of Potassium Nitrate and Calcium Phosphate are produced?
February 15, 2012

Reading
Dear Ms. Sue, No matter how hard I try, nobody knows a 6th grade definition for the word "Panning". Can you please help?
February 14, 2012

physics
Calculate Earth’s gravitational force on the Shuttle astronauts while orbiting at an altitude of 220 miles (or 354 km) above Earth’s surface.
January 14, 2012

Physics
Right are you sat down ? Well this object nearly killed a work collegue of mine..the company involved are not remotely concerned, even though this projectile came out of the safety zone by 20 metres. Now as the projectile was approximately no more than 2 metres off the ground...
January 13, 2012

Physics
How do you conclude the answer to the following : What will be the approximate pressure (bar/psi ) for a bullet shaped object weighing 35kg..500mm diameter x 900mm. to travel horizontally for a distance of 30 metres before landing..
January 13, 2012

Physics
How do you conclude the answer to the following : What will be the approximate pressure (bar/psi ) for a bullet shaped object weighing 35kg..500mm diameter x 900mm. to travel horizontally for a distance of 30 metres before landing..
January 13, 2012

physics
The energy stored in a capacitor with capacitance C, having an electric potential difference ΔV, is represented by W = 1/2 C ΔV2. One application of this is in the electronic photoflash of a strobe light, like the one in the figure below. In such a unit, a capacitor ...
January 12, 2012

Since
an orinisams abiliaty to mantian a steadyconditionfor examplebody temputure,is called................
September 26, 2011

Business
You're an individual investor who holds common stock in a large blue chip company. You've received notice of a proposed change. Instead of using the existing statutory method, the proposal calls for the company's board of directors to be elected by the cumulative ...
August 8, 2011

science
A stone is thrown vertically upward with a speed of 11.0 m/s from the edge of a cliff 80.0 m high. How much later does it reach the bottom of the cliff?
February 28, 2011

Math
How do you multiply this polynomial (3m+4n)2
February 23, 2011

Math
How do you find the expression for the perimeter of the flag One side of a triangular flag is two more than five times tue third side
February 17, 2011

algebra
a cube has a side length of 4x-3, express its volume as a polynomial
January 27, 2011

physics
That didn't give me the correct answer
November 16, 2010

physics
What is the total force on the bottom of a swimming pool 22.0 m by 8.9 m whose uniform depth is 1.6 m? What is the absolute pressure on the bottom of a swimming pool? What will be the pressure against the side of the pool near the bottom?
November 16, 2010

Physics-Kinetic energy
Thanks a lot, I figured out the answer.
October 31, 2010

Physics-Kinetic energy
A car has a kinetic energy of 4.32 * 10^5 J when traveling at a speed of 23 m/s. What is its mass? Sorry for re-post and if anyone decides to help please step by step.
October 31, 2010

Physics( Checking answer)
Sorry for re-posting but I really need to know if I did it right. Please someone help! Two 3.0g bullets are fired with speeds of 40.0 m/s and 80.0 m/s respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the ratio of their kinetic ...
October 31, 2010

Physics(checking answer)
Two 3.0g bullets are fired with speeds of 40.0 m/s and 80.0 m/s respectively. What are their kinetic energies? Which bullet has more kinetic energy? What is the ratio of their kinetic energies? I got 60 for the first bullet and 120 for the second. I am not sure I used the ...
October 31, 2010

CHEM
I don't understand it still.
October 20, 2010

CHEM
One piece of copper jewelry at 101°C has exactly twice the mass of another piece, which is at 36.0°C. Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside the calorimeter (c of copper = 0.387 J/gK)?
October 20, 2010

Chemistry
A 30.5 g sample of an alloy at 94.0°C is placed into 48.7 g water at 20.3°C in an insulated coffee cup. The heat capacity of the coffee cup (without the water) is 9.2 J/K. If the final temperature of the system is 31.1°C, what is the specific heat capacity of the ...
October 19, 2010

College Physics
because it says the two forces do the same amount of work, you can tell that the two distances given are the hypotenuse and leg of a right triangle. after that it's just a matter of taking the inverse cos of adjacent/hypotenuse
July 5, 2010

10th grade algebra 2
the third root of 3, times the square root of 9
June 4, 2010

Chemistry
When 20.0 mL of 0.100 M AgNO3 are mixed with 80.0 mL of 0.0100 M Na2CrO4, what is the chromate ion concentration (CrO4^2-)? Ksp for Ag2CrO4 = 9.0 x 10^-12. I think it's 1.0 x 10^-9. Am I right?
May 6, 2010

Chemistry
When you add 25.0 mL of 1.0 M NaF to 20.0 mL of 1.0 M HF,what would be the result? I think it's a basic buffer. Am I right?
May 6, 2010

US
What bold statement was made by the Monroe Doctrine?
April 14, 2010

math
(x+6)(x+5)=2 multiply x by x and x by 5 and 6 by x and 6 by 5 so u get x^2+5x+6x+30=2 2-30 x^2+5x+6x=-28 thats as far as i can get lol hope it helps
April 14, 2010

US History
How did the Mexican War help expand the sectional divide in the U.S.?
April 14, 2010

math
how do I do this? 28 students collected 12,374 soda can tabs. If some of the students collected one more tab than the rest of the students, how many collected 441 and how many collected 442?
March 17, 2010

physics
How do i determine the volume displaced when given mass and volume of an object.
February 24, 2010

Math
What is the probality of rolling a number less than or equal to 2 on the number cube?
February 1, 2010

physics
A 15N block is immersed in a salt water (density = 1030 kg/m3). Determine the buoyant force acting on the block if the spring scale reads 11.8 N.
January 19, 2010

physics
A 15 N block is hung from a spring scale. What is the weight of the block in air?
January 19, 2010

physics
A vertical spring (k = 1040 N/m) is compressed a distance of 11.6 cm. A 47.9 g mass is placed on the spring, then released so the mass flies upward. When the mass is 120 cm above the spring, what is the speed of the mass?
December 10, 2009

physics
Because work=force*distance. The net force is zero for a car traveling along a level road at constant velocity. The zero total work explains why the car’s speed doesn’t change.
December 10, 2009

physics
A 710 kg car travels along US-321. How much working is needed to keep the car traveling at a constant speed of 21.1 m/s around a curve of radius 28.2 m?
December 10, 2009

physics
A person pulls on a 41 kg table with a 203 N force acting at an angle of 27.1 degrees above the horizon. The frictional force on the table is 120 N. What is the speed of the desk after it has moved 2.3 m?
December 10, 2009

physics
A box of mass 11.9 kg is pulled to the right with a horizontal force of 11.3 N. The box moves to the right with constant velocity, 1.6 m/s. Determine the amount of working the pulling force and the normal force do if the box moves 5.7 m.
December 9, 2009

physics
A 50. kg cart is moving across a frictionless floor at 2.0 m/s. A 70. kg child, riding in the cart, jumps off so that the child hits the floor with zero velocity. What was the velocity of the cart after the boy jumped?
December 7, 2009

physics
A 50. kg cart is moving across a frictionless floor at 2.0 m/s. A 70. kg child, riding in the cart, jumps off so that the child hits the floor with zero velocity. What was the velocity of the cart after the boy jumped?
December 7, 2009

physics
An astronaut whose mass is 80. kg carries an empty oxygen tank with a mass of 10. kg. The astronaut throws the tank away with a speed of 2.0 m/s. With what velocity does the astronaut start to move off into space?
December 7, 2009

physics
The driver of a 1024 kg truck traveling 32.6 m/s North on I-77 has to make a sudden stop. If it requires a distance of 57.1 m for the truck to stop, use conservation of energy to find the net force acting on the truck.
November 18, 2009

physics
The driver of a 1024 kg truck traveling 32.6 m/s North on I-77 has to make a sudden stop. If it requires a distance of 57.1 m for the truck to stop, use conservation of energy to find the net force acting on the truck.
November 17, 2009

chemistry
A student placed 10.5 g of glucose C6H12O6 in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.mL mark on the neck of the flask was reached. The flask was then shaken until the solution was uniform...
October 6, 2009

math
how do you graph a pattern?
October 4, 2009

Chemistry
A scientist wants to make a solution of tribasic sodium phosphate, Na_3PO_4, for a laboratory experiment. How many grams of Na_3PO_4 will be needed to produce 375 mL of a solution that has a concentration of Na^+ ions of 1.10M? I tried multiplying .375 L by 1.10 M to get the ...
September 28, 2009

chemistry
Vanadium forms four different oxides in which the percent by mass of vanadium is respectively 76%, 68%, 61%, and 56%. Find the formula of the first oxide. How would I go about doing this? I tried to use my book but there are no examples of this question. Thanks!
September 21, 2009

Chemistry
? CaSO_4 + AlCl_3 ---> CaCl_2 + Al_2(SO_4)_3 How do I balance this equation so that there are the same number of sulfate ions on both sides of the equation?
September 19, 2009

social studies
physical maps help you see what?
May 11, 2009

Technical writing
Access the user manual for any one of the following programs or applications: • Microsoft® Access • Microsoft® PowerPoint® • Microsoft® Excel • Microsoft® Word • Microsoft® Outlook® User manuals are available via the “...
April 19, 2009

human resources
Which one of the following is a good way to deal with frustration?
April 2, 2009

distance problem
Suiz drove home at 60mph, but her brother jim, who left at the same time, could only drive at 48mph. when suzie arrived, jim still had 60 miles to go. how far did suzie drive? Please show work
March 8, 2009

7th grade science
i need help creating acrostic puzzles for the 6 differant land biomes.
February 27, 2009

6th gr GRAMMAR
because it was a 6th grade grammar question on my book- they labled it as a 6th grade level. sorry to mislead you.
October 17, 2008

6th gr GRAMMAR
oh, it was an SAT question so i had no choice... thank you!
October 17, 2008

6th gr GRAMMAR
well, i think i'm wrong b/c the answer says it's 'are'. i dont get why tho..
October 17, 2008

6th gr GRAMMAR
so youre saying that prep phrases matter now? so youre saying: everyone of those flyers are green instead of is?
October 17, 2008

6th gr GRAMMAR
but thats a prepositional phrase, ithought those dont matter in determining the plurality of a verb
October 17, 2008

6th gr GRAMMAR
why is : she is one of the few quaterbacks who (is/are) ready for prime time the answer is "are" why is that correct? shouldnt it be is because she is one=singular?
October 17, 2008

Algebra
Trying to figure out how to find all numbers for which the rational expression is undefined. 9/2z+5 Is the answer -5/2 or -10/9? I made a mistake in my typing when I asked the question earlier.
June 16, 2008

Algebra
Trying to figure out how to find all numbers for which the rational expression is undefined. 9/2z+5 Is the answer 0? I made a mistake in my typing when I asked the question earlier.
June 16, 2008

Algebra
Trying to figure out how to find all numbers for which the rational expression is defined. 9/2z+5 Is the answer 0?
June 16, 2008

ALGEBRA
56 over X = 9-X over 2 Can someone tell me what X is please :) Thankyou for your help. If you don't want to just tell me the answer, it would be great if you could give a step-by-step example of how to do one similar to that. or an example of how to do the one I can't ...
May 6, 2008

math
integration by parts: 1. e^(sqrt(3x+9)) 2. sin(lr) are the answers: 1. 2e^(sqrt(3x+9))(sqrt(3x+9)-1) + C 2. -r cos(lnr) + sin(lr) + C
May 28, 2007

calculus
integration by parts: 1. e^(sqrt(3x+9)) 2. sin(lr) are the answers: 1. 2e^(sqrt(3x+9))(sqrt(3x+9)-1) + C 2. -r cos(lnr) + sin(lr) + C
May 27, 2007

trig help
I need help finding sinA if cosA=(-3/5) and A is greater than 90 degrees, but less than 180 degrees. Draw the quadrant diagram. In the upper left quadrant, greater then ninety degrees, but less than 180, cosine is neg, and sine is positive. Draw a three, four, five right ...
May 6, 2007

biology
analogy of a cytoskeleton enter Cytoskeleton Tutorial http://www.ccps.k12.va.us/news_release/rh/cell_biology.htm
March 17, 2007

Ethics
I have an assignment to due on Hispanic American Diversity. I have to chose 4 Hispanic groups. I chose Mexican Americans, Puerto Ricans, Dominican's, and Cubans. I have to write a research paper and identify the linguistic, political, social, economic, religious and ...
February 11, 2007

mole
how do i find... howmany moles are in a specified mass mols = grams/molar mass
January 13, 2007

Pyiscal science
When nickel combines with flourine to form nickel [3] floride, the charge of the nickel ion is All of my references list NiF2 as the formula. Therefore, Ni would have a charge of +2.
December 13, 2006

word unscramble
oelsanlchtoa Try these: http://www.ssynth.co.uk/~gay/anagram.html http://www.unscramble.net =) 1. ssiearf 2. oisb 3.smgleeu
December 11, 2006

science
how was sulfur named? http://www.vanderkrogt.net/elements/elem/s.html
November 4, 2006

Math
having trouble solving equation 8+3x6-4-1=13 can anyone help we have tried everything and it's not working out for me is that 3x or 3*6 3*6 Are you sure you put the right equation? yes. 8+3*6-4-1=13 what do the instructions say? Is this a grouping problem? because 8+3*(6-4...
November 2, 2006

U.S. Government
Thi‚“ is about James Madisonfs@Federalist Essays. My question ishWhy does madison want to ratify this constitution?h Anyone please answer that question. To ratify means to formally approve the consitution. This means that the states accept the...
October 12, 2006

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