Saturday
July 26, 2014

Posts by allison


Total # Posts: 440

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 t...

Grade 11 math - HELP!
Thank youu !

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?

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?

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 the...

Math
Thank you so much!

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

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 perio...

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

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.

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 wor...

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 ...

Calculus
Is it (0,0), (2,0) and (-2,0)?

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.

English
"It" refers to gardening. Fransisco is telling his Grandpa that gardening is easy.

tourism
which aTourism gencies in Jamaica govern

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?

Chem Help URGENT
thank you so much

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 (a...

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 wit...

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!

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?

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?

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.

Math
principle= rate x time p=rt $69.64=7.5% x t solve for t

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!

AP Biology
^^ Thanks, Bobpursley.

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..!

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.

AP Biology
You were wrong... It's not A.

AP Biology
Thanks, Ariyonia! :)

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 b...

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?

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

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?

algebra
An ostrich can run 174 feet in 3 seconds.

algebra 2 / trig
what is the square root of negative 150?

WH
Who traded coffee between 600-1450?

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

French
What word is NORCETMAIN unscrambled in French?

city college
discuss the cultural versus evolutionary explanations for gender differences in aggressiveness.

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...

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 ve...

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

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

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...

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...

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.

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!

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

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 --> ?

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?

Pre-calc
How do you find the range of a projectile?

math
All you have to do is divide by three

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

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?

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

chemistry
i still dont get my question. I dont understand how to set it up

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?

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

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>

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

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.

Physics
An 81 kg baseball player slides into second base. The coefficiant of kintetic friction between the player and the ground is 0.49. a) What is the magnitude of the frictional force? b) If the player comes to rest at 1.6 s, what was his intial velocity?

Math
Four girls bought a boat for $60.00. the first girl paid-one half the sum of the amounts paid by the other 3. The second girl paid one-third the sum of the amounts paid by the other 3. The third girl paid one-fourth the sum of the amounts paid by the other 3. How much did the ...

MATH ??
I looked at a 1938, 39 & 40 calender and they are all still on the same day. What am I missing thanks for your help

physics
The centers of a 11 kg lead ball and a 70 g lead ball are separated by 8.0 cm. What gravitational force does each exert on the other?

calculus
I have a couple of questions that I'm not sure how to do! 1) Given f(x) = (x^2 - 2x + 1) for x does not equal 1 and (k) for x = 1 Determine the value of k for which f is continuous for all real x. a) 0 b) 1 c)2 d)3 e)none of the above i think the anser is a but i'm rea...

Math
thank you

Math
Write 8/25 in Decimal (use the prime factorization of the denominator and explain if it repeats or terminates).

math
32/(4+4)* 2 to the third power-7=

science
A diesel engine's piston compress 16cm3rd of fuel air mixture into 1cm3 The pressure changes from a atmosphere to 48 atmospheres if the initial temp. of the gas was 305k What was the final temerature

business
What is the impact of computer graphics on the research report writing format?

hum 130
Is indigenous religion in australia still practiced today?

Science
Is heat transferred from a cool surface to a warm one or is it vice versa? Thanks

com/220
how do I quote a source from the library

algebra
the length of a rectangle is twice the width. The area is 200yd^2. Find the length and the width.

science
Amino acids that you obtain from eating foods are classified as A. essential. C. extracellular. B. facilitated. D. inorganic. A - is this correct

math
Im sorry the questino sould actually be deermine it algerbraically. 2^x+1-8=5^(1/3x) Please help me, I have tried so many times to get the rght answer and I can't.

math
Determine the value graphically. 2^x+1-8=5^(1/3x)

English
For English class, we're doing a vocab. review for seventh graders, as part of our teaching project. Should seventh graders know what inevitable means? What age should people know that word by? Thank you.

math
3 2/3*2 7/8

precalculus
(cos^4ө- sin^4ө/ cos^2ө)+ tan^2ө = {(cos^2ө-sin^2ө)(cos^2ө+sin^2ө)/cos^2ө}+tan^2ө = 1{(cos^2ө-sin^2ө)/cos^2ө}+tan^2ө =?

precalculus
I dont understand this problem: (Tanө + cos ө)/ (sec ө + cot ө) so I start off like this: ={(sinө / cos ө)+cosө}{cos ө + (sinө/cosө)} =[(sin ө +cos^2ө) (cos^2ө +sin ө)]/ cos ө but what co...

the language of healthcare
Describe the following approaches used to organize information about the body. Also provide an example for how each approach is used. Body planes and directions Body Cavities Quadrant and regions Anatomy and physiology Microscopic-to-macroscopic Body systems Medical speciality

geometry
what does it mean when the scale factor (ratio) of the actual object to its model is less than 1? ; greater than 1?

LSU
How many 3 cm cubes will fit into a 1m cube?

LSU
How many 2 inch cubes will it take to make a rectangular prism that is 8 inches by 10 inches, by 14 inches?

LSU
A can of black olives has a diameter of 8 centimeters and height of 20 cm. If the can contains 15 olives, each approximately 2 cubic cm, then what is the approximate volume of the liquid filling the can?

LSU
What happens to the volume of a right circular cylinder if you double its diameter?

LSU
Determine the surface area of a cylinder whose height is 2m and whose base has an area of 9 pi m square?

math
i dont under stand! my teacher made it look easy, but when i went to do my home work, the book said something totaly differrent. it starts of withthe age of some joggers, 10-19 and trhe frequency is 5? please make it easyer! this is not making sense!

math
how to show that 7/8 is bigger than 5/6

science.. please help!!
i need to find two articles in anything to do with an ecological concern (ex. pollution as a threat to our ecosystem)... please help me find a site, i can't find any good ones!!

math
its the |A+B+C|=4.. because our P.O.I was (2,-2), therefore A=1(2) + B=-1(-2) and C=-4....that makes 2+2-4.. that's 0

math
ok, but if i were dealing with the formula ... *absolute value*Ax+By+C/over -> *square root* A^2 +B^2

math
Find the exact value of the shortest distance from the origin to each line. y=x-4 is the equation of the line. When i do the problem I keep on getting 0 but that's not the answer!!! please help me.

math
indo european number system

plz integrate
how do u integrate 1+u/3u+2u^2 please help me get started ...tnk u

integrate
to be more specific...i know its best for me to attempt the problem so for the first problem i used substitution as v=3u dv=3du du=dv/3 so answer i got was 1/3 ln3u is that correct? and on the second on i tried x*x^-2 as x^-3 dx so ans is -1/2x^-2 is that correct? please let m...

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