Tuesday
March 31, 2015

Posts by allison


Total # Posts: 478

Chemistry
If 40 g of KNO3 is dissolved in 100 mL of water at 25 degrees celisus, what will the final temperature be?
April 17, 2011

Oral presentation
ohh I see thank you for your help :)
April 15, 2011

Oral presentation
okay thanks! Its called "Not Marble, Nor the Gilded Monuments" by Shakespeare
April 15, 2011

Oral presentation
My teacher gave us a sonnet and he said that we have to do an oral presentation that faithfully interprets the meaning of the poem. Do you have any ideas on how to make an oral presentation describing a poem. Should I explain line by line or just put the sonnet in my own words...
April 15, 2011

Physics
A faulty model rocket moves in the xy-plane (the positive y-direction is vertically upward). The rocket's acceleration has components a(t)_x=alpha*t^2 and a(t)_y=beta-gamma*t, where alpha = 2.50 , beta= 9.00 , and gamma= 1.40 . At the rocket is at the origin and has ...
April 13, 2011

math
An initial investment of $1240 is appreciated for 17 years in an account that earns 8% interest, compounded continuously. Find the amount of money in the account at the end of the period.
April 8, 2011

math
The decay of 333 mg of a radioactive substance is given by A(t) = 333e-0.024t, where t is time in years. Find the amount left after 17 years.
April 8, 2011

Physics
If the expression for a given vector is Vector A-Vector B=(4-5)i^+(3+2)j^ and the magnitude of the difference of the vector is equal to 5.1. What is the direction of the difference Vector A - Vector B. (in the counterclockwise and +x direction)
April 7, 2011

Physics
Thank you!! That helped a lot
April 7, 2011

Physics
An explorer in the dense jungles of equatorial Africa leaves his hut. He takes 43 steps at an angle 45north of east, then 80 steps at an angle 60 north of west, then 51 steps due south. Assume his steps all have equal length. Save him from becoming hopelessly lost in the ...
April 7, 2011

Physics (PLEASE HELP!)
Two point charges, the first with a charge of +3.25×10−6 C and the second with a charge of -4.63×10−6 C , are separated by 25.5 cm. Find the magnitude of the electrostatic force experienced by the positive charge. Is the magnitude of the force ...
April 4, 2011

Chemistry
What is the concentration of OH- in a solution that contains 0.225g of NaOH in 0.250L of solution?
April 2, 2011

Chemistry
I am having trouble figuring out the calculations for osmotic pressure. This is what I need to do. Indicate whether the osmotic pressure of a 0.1M NaNO3 solution will be less than , the same as , or greater than that each of the following solutions a. 0.1M NaCl b. 0.1M KNO3 c...
April 2, 2011

Biology
in cattle a dominant gene (N) results in a deep notch in each ear. a recessive gene (n) results in an "udder" abnormiality when in the homozygous condition. a farmer desires to rid his herd of these characteristics. which of these two alleles would be easiest to ...
March 25, 2011

Chemistry
Enter the net ionic equation, including phases, for the reaction og AgNO3 (aq) with Ba(OH)2 (aq). I have Ag+ +OH- =AgOH but I dont know how to determine the phases.
March 18, 2011

Math
Miles said that he measured an angle of a regular polygon to be 130 degress. Explain why this result is impossible.
March 17, 2011

Calculus
a) Find a Cartesian equation relating and corresponding to the parametric equations: x=2sin(3t), y=9cos(3t). Write your answer in the form P(x,y)=0, where P(x,y) is a polynomial in x and y, such that the coefficient of y^2 is 4. b)Find the equation of the tangent line to the ...
March 12, 2011

Calculus
I just figured it out! thank you!
March 12, 2011

Calculus
if x=e^t and y=(t-3)^2 , find an equation y=mx+b of the tangent to the curve at (1,9).
March 12, 2011

physics/physical science
I have multiple questions like the following and need help on how to work out the answer of one because our book does not cover impulse. a car is at rest when it experiences a fwd propulsion force to set it in motion. it then experiences a second fwd propulsion force to speed ...
March 2, 2011

physics
a pirate ship fires a 25kg cannonball with a velocity of +100m/s at a very heavy fur trader ship. the ship is at rest. the cannonball bounces off the side of the ship, making a hole. after the collision the cannonball has a velocity of -0.5m/s. assume the water did not absorb ...
February 28, 2011

World Civics
How did the U.S. affect Latin America in the 1920's and 1930's? Was it positive or negative? Explain. What happened to Latin American governments in the 1930's? Why did it happen?
February 25, 2011

Calculus
A chain 27 feet long whose weight is 74 pounds is hanging over the edge of a tall building and does not touch the ground. How much work is required to lift the entire chain to the top of the building?
February 11, 2011

calculus
To find the slope of the tangent line you have to take the first derivative of f(x). So f'(x)=-5. Or you can also see that from the formula y=mx+b, where m is slope and b is your y intercept, that -5 is the slope. Because the original function is a line, the slope is the ...
February 11, 2011

physics
How much work is required to lift a 600-kg satellite to an altitude of 4 * 10^6 m above the surface of the earth? The gravitational force is F=GMm/r^2, where M is the mass of earth, m is the mass of the satellite, r is the distance between them. The radius of the earth is 6.4...
February 11, 2011

Math
Walking down a long moving escalator, Phil covered 75 m in distance in 25 seconds. Walking back up against the motion of the escalator, the distance was covered in 75 seconds. What was the speed of the escalator?
February 6, 2011

statistics
I have created my chart but am really confused on creating a Hypothesis and how to actually use the information obtained by my chart. The question is about the variance in a production process is an important measure of quality. A lrg var often signals an opportunity for ...
January 28, 2011

english LAC 1
28. Which of the following sentences contains a shift in tense? (Points : 5) Reading biographies helps you understand how the world works. Once he had finished the book, he will write the report. Sure, it is easy to dye clothes if you know how. The sky was clear and blue, and ...
January 25, 2011

english LAC 1
11. What kind of complement is the underlined word? Mom, give us a break, just once. (Points : 5) direct object indirect object predicate nominative predicate adjective 12. What kind of complement is the underlined word? Isn't this movie The Black Stallion? (Points : 5) ...
January 25, 2011

math-finance
Colin borrowed some money at 7.16%?a compounded quarterly. three years later. he paid $5000 toward the principal and the interest. after another two years, he paid another $5000. after another five years, he paid the remainder of the principal and the interest, which totalled...
January 18, 2011

U.S.History
Why was the Virginia Colony successful?
January 9, 2011

Math
yes, I think I found the second too. 6(x+1)(2x+1)?
January 6, 2011

Math
Find the second derivative of x(x+1)^3
January 6, 2011

7th grade math
6+x=2x-14. I'm not to sure how to solve this type of equation.
January 6, 2011

Trigonometry
Sketch a height versus time graph of the sinusoidal function that models each situation. draw at lease three cycles. assume that the first point plotted on each graph is at the lowest point: a girl lying on a an air mattress in a wave pool that is 3 m deep, with waves 0.5 m in...
January 1, 2011

Math
Suppose you invest $600 at an annual interest rate of 3.9% compounded continuously. How much will you have in the account after 25 years?
December 24, 2010

Grade 11 math - HELP!
Skyscrapers sway in high-wind conditions. in one case, at t=2s, the top floor swayed 30cm to the left (-30cm), and at t=12, the top floor swayed 30 cm to the right (+30cm) of its starting position. a) what is the equation of a sinusoidal function that describes the motion of ...
December 21, 2010

Grade 11 math - HELP!
Thank youu !
December 12, 2010

Grade 11 math - HELP!
The diameter of a car's tire is 52 cm. While the car is being driven, the tire picks up a nail. How high above the ground will the nail be after the car has travelled 0.1 km? can someone please explain how to solve this question?
December 12, 2010

Math
Thank you I found that at 0.213 of a cycle the distance travelled would be 34.8 cm in terms of the first cycle. And I found the height at that distance to be 22.15 cm Is that correct?
December 12, 2010

Math
The diameter of a car's tire is 52 cm. While the car is being driven, the tire picks up a nail. How high above the ground will the nail be after the car has travelled 0.1 km? It also asked me to graph this information. So I created a periodic graph that starts at 0 and ...
December 12, 2010

Math
Thank you so much!
December 11, 2010

Math
i don't think this is a cycloid because i'm only in grade 11 math and have never heard that term before this is from the "periodic function and their properties" unit so, is it possible to give me an answer related to that? thank you
December 11, 2010

Math
maria's bicycle has a diameter of 64 cm. as she rides at the speed of 21.6 km/h, she picks up a stone in her tire. draw a graph that shows the stone's height above the ground as she continues to ride at this speed for 2 s more. can someone please help me find the ...
December 11, 2010

Chemistry
What happens to the sample's reported water content if the salt decomposes yielding a volatile product? If the water is not completely removed from the salt during the heating process, will the reported water-to-salt mole ratio be high or low? Explain
December 6, 2010

Chemistry
If some volatile impurities in the crucible are removed from the hydrated MgSO4 along with the water, is the reported mass of water removed too high or too low. Explain.
December 6, 2010

chemistry
Enthalpy and Entropy in Reactions and Solutions Introduction In the course of most physical processes and chemical reactions there is a change in energy. In chemistry what is normally measured is H (enthalpy change), the change in heat at constant pressure and ignoring any ...
November 30, 2010

phsyics
The 3.0cm-diameter water line in the figure splits into two 1.0cm -diameter pipes. All pipes are circular and at the same elevation. At point A, the water speed is 2.0 m/s and the gauge pressure is 50 kPa. What is the gauge pressure at point B. I keep getting an answer that I ...
November 15, 2010

Calculus
Is it (0,0), (2,0) and (-2,0)?
November 11, 2010

Calculus
What are the coordinates of the points at which the slope of a function with the equation y=x^4-8x^2 is equal to zero? Please help me to understand how to approach this question.
November 11, 2010

English
"It" refers to gardening. Fransisco is telling his Grandpa that gardening is easy.
November 8, 2010

tourism
which aTourism gencies in Jamaica govern
November 5, 2010

Chemistrty Help
Calculate the wavelength of each of the following frequencies of electromagnetic radiation. 1040 kHz} (typical frequency for AM radio broadcasting) (assume four significant figures) in METERS? Can someone help me?
October 29, 2010

Chem Help URGENT
thank you so much
October 28, 2010

Chem Help URGENT
Could someone help me with these molecular formulas, i dont know what im doing wrong. For this example, i did it like this and it says its incorrect. Could you solve the the equations below your way and i match it to mines? Thank you so much Fe (s) + Ni(NO3)2 (aq) =Fe(NO3)2 (...
October 28, 2010

history- political science
Hi everyone =D thanks in advance to those who helped me. I am in need of a format or outline of some kind to help me write my 5-6 page term paper that is based on three books comparing and contrasting the themes within all three of their historic concerns on/of immigration ...
October 23, 2010

American Government
This is an old question, but for anyone cruising by looking for help, assuming we are using the same text book, you can refer to Chapter 3. The answer is pretty much right in front of you; you just have to write the paragraphs! Hope this helped. Good luck!
October 22, 2010

Physics
A rocket is fired at a speed of 75.0 m/s from ground level, at an angle of 63.0° above the horizontal. The rocket is fired toward an 11.0 m high wall, which is located 22.0 m away. By how much does the rocket clear the top of the wall?
October 13, 2010

PHYSICS
The blade of a windshield wiper moves through an angle of 90.0° in 0.49 s. The tip of the blade moves on the arc of a circle that has a radius of 0.6 m. What is the magnitude of the centripetal acceleration of the tip of the blade?
October 5, 2010

PHYSICS
A satellite is placed in orbit 6.30*10^5 m above the surface of the planet Jupiter. Jupiter has a mass of 1.90 1027 kg and a radius of 7.14*10.7 m. Find the orbital speed of the satellite.
October 5, 2010

Math 3
1700 3,500 1,600 7,400
September 17, 2010

Math
principle= rate x time p=rt $69.64=7.5% x t solve for t
August 19, 2010

English/ Writing
I have to persuade my teacher in an essay that a dog is an apple or that an apple is a dog. I can't think of any ways that a dog is like an apple and visa versa. Help!
August 18, 2010

AP Biology
^^ Thanks, Bobpursley.
August 2, 2010

AP Biology
It's alright... But could you at least mention that it's just a guess before you end up giving me a C+ in Biology..!
August 2, 2010

AP Biology
I am, but none of them are giving me the information I need. I researched them all for hours only to come out empty-handed.
August 2, 2010

AP Biology
You were wrong... It's not A.
August 2, 2010

AP Biology
Thanks, Ariyonia! :)
August 2, 2010

AP Biology
They type of learning that is involved in predator/prey interactions where an alteration in behavior is a response to stimulus is called A. Habituation Learning B. Cognitive learning C. Instinctive Learning D. Associative Learning E. Non-associative Learning I believe it can ...
August 2, 2010

AP Biology
What is not dependent on sunlight as a source of energy? A. Benthic Zone B. Pelagic Zone C. Neritic Zone D. Taiga E. Tundra I think it's A, B, or C. Is it?
August 2, 2010

chemistry
calculate the heat required to raise the temperature of 1.00 L of water from 17.0 degrees celcius to the boiling point
July 13, 2010

Math
The bases of a trapezoid are 24 and 33 inches long and it encloses an area of 571. Without determining the height of the trapezoid find the areas of the triangular regions into which the diagonals divide the quadrilateral?
May 29, 2010

algebra
An ostrich can run 174 feet in 3 seconds.
May 27, 2010

algebra 2 / trig
what is the square root of negative 150?
May 24, 2010

WH
Who traded coffee between 600-1450?
April 28, 2010

English
In the Great Gatsby, Why does Nick say that reserving judgements "is a matter of infinite hope?" in the opening chapter?
April 27, 2010

French
What word is NORCETMAIN unscrambled in French?
April 14, 2010

city college
discuss the cultural versus evolutionary explanations for gender differences in aggressiveness.
April 10, 2010

micro economics
Another business may make far more money on this land than the motel can make. Another aspect to consider is the motels property tax may go up far more that the motel can support. They need to look and see if how much their profit is and see how much the land could sell for in...
April 7, 2010

Chemistry
If the temperature of a confined gas is doubled at constant pressure, what change is observed? A) The volume of the gas is decreased to 1/4 of its original value. B) The volume of the gas is increased to twice its original value. C) The density of the gas is doubled. D) The ...
March 29, 2010

AP Chemistry
For c it is both the Ka for BH^+ and concentration of BH^+ to determine pH at the equivalence point.
March 8, 2010

Corporate Finance
Depreciation for the first year = 33% of equipments= 21450 Sales 60000 Less Operating costs 25000 Less Depreciation 21450 Profit before taxes 13550 Less taxes 4743 Profit after taxes 8808 Add Depreciation 21450 Cash flow after taxes 30258
March 1, 2010

math
No that is wrong. The probability when rolling a 6 sided cube and landing on one number is what you are trying to figure out. Since you role a cube, you only have the ability to land on one number at a time. The question is what is the probability of landing on a 4...So... try...
January 29, 2010

math
Add all of them together like you were doing... 2+4+4=10 Then make fractions of the amount for each colored sock in relation to the total... Blue Pair Probability: 2/10 --simplified... 1/5 WhitePair: 4/10 Simplified... 2/5 And so on...
January 29, 2010

SS
Will the world truly end in 2012 or is this just an absurd myth? I have heard arguments for both sides...but what is the truth.
January 29, 2010

social studies
I'm about to sign up for classes and am wondering...what are microeconomics and macroeconomics and what are the differences between the two?? THANKS!
January 25, 2010

college
if you take a $1000.00 and add 6% over 48 years how much would you have
January 24, 2010

Chemistry
im sorry i dont understand could you please go into a little more detail.. i broke it up into NaC7H4ClO2 --> Na+ and C7H4ClO2 then did C7H4ClO2 + H2O --> ?
January 21, 2010

Chemistry
If you have 0.2 M of NaC7H4ClO2 with a pH of 8.65, what is the pH of 0.2 M of HC7H4ClO2?
January 21, 2010

Pre-calc
How do you find the range of a projectile?
January 4, 2010

math
All you have to do is divide by three
December 9, 2009

10th grade algebra
the volume of a pyramid with a rectangular base is v=1/3LWH. find W if V=500 L=15 and H=4. a) W=25 b) W=20 c) W=18 d) W=15
November 17, 2009

Algebra
Find domain and range of each. {(-1,2) (0,2) (1,3) (2,2)} Domain: {-1,0,1,2} Range: {2,3} {(1,5) (2,9) (3,9)} Domain: {1,2,3} Range: {5,9} {(1,2) (1,5) (3,7)} Domain: {1,3} Range: {2,5,7} Are these all right?
November 13, 2009

Physics
I just did this problem for an assignment and used sin not tan. Otherwise I agree.
November 12, 2009

chemistry
i still dont get my question. I dont understand how to set it up
November 10, 2009

Chemistry
CH4+Cl2->CH2Cl2+HCl. If 6.00 g of CH4 are mixed with 6.00 g of CL2, how much HCl can be made? What is the percent yield if 2.5 g are recovered from the reaction in the lab?
November 10, 2009

12th grade Physics
Determine the x and y components if a dog walks to the park that is 24m, 30 degrees northwest. Please help i don't know how to go about solving this problem
November 4, 2009

algebra 2
x+y>4 will turn into y>-x+4 you will graph it like it says = instead of > and shade above the line. x-y<7 will turn into y>x-7. Graph like there is an = and shade above the line with a different color. Where the colors overlap will be the answer>
November 4, 2009

maths ( mental ability)
2/3 of 9 is 6
November 2, 2009

Physics
Traveling at a speed of 16.1 m/s, the driver of an automobile suddenly locks the wheels by slamming on the brakes. The coefficient of kinetic friction between the tires and the road is 0.72. How much time does it take for the car to come to a stop? Ignore air resistance.
October 22, 2009

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