Wednesday

November 26, 2014

November 26, 2014

Total # Posts: 441

**Biology**

Compare and contrast the traits and growth patterns of opportunistic versus equilibrium populations.
*October 17, 2014*

**Biology**

Explain how human activities can cause an imbalance in biogeochemical cycling and lead to problems such as cultural eutrophication and fish kills.
*October 17, 2014*

**chemistry**

100 mL of a 0.1 mM buffer solution made from acetic acid and sodium acetate with pH 5.0 is diluted to 1 L. What is the pH of the diluted solution?
*October 10, 2014*

**physics**

A car is traveling at 100 km/h, due northwest. The driver puts on the brakes and turns the corner. Four seconds later, he is heading east at 50 km/h. What is the average acceleration
*October 2, 2014*

**Physics**

I figured the answer out, but for future reference for others: F = reaction of the ground F = mg + ma V² = 2ax (x = 0.50m) a = V²/2x = 2gh/2x = gh/x F = mg + mgh/x F = W + Wh/x F = W(1+h/x) here F = (1 + 0.64/0.50)W F = 2.3W
*October 1, 2014*

**Physics**

A person reaches a maximum height of 65cm when jumping straight up from a crouched position. During the jump itself, the person's body from the knees up rises a distance of around 50cm . To keep the calculations simple and yet get a reasonable result, assume that the ...
*October 1, 2014*

**math.help pls**

THE LIMIT DOES NOT EXIST!! (MEAN GIRLS REFERENCE) LOL. NOT THE ANSWER THO!!
*September 28, 2014*

**math**

sry sry sry!!!
*September 24, 2014*

**math**

Nevrmnd sry!
*September 24, 2014*

**HELP IN SCIENCE ASAP!!**

The desert tortoise digs a burrow and hides in it during the day to stay cool, because of the extreme heat above ground. Which characteristic of life does this behavior best illustrate? A- response B- metabolism C- cellular organization D- growth and development (my guess is A...
*September 19, 2014*

**HELP IN SCIENCE ASAP!!**

PLEASE HELP!!
*September 19, 2014*

**math**

Which variable expression represents the word phrase? six decreased by the sum of a number and two. A- (m + 2) - 6 B- 6 - (m - 2) C- (m - 2) + 6 D- 6 - (m + 2)
*September 17, 2014*

**math**

A and C?
*September 17, 2014*

**math**

Which word phrase can be modeled by the expression? Choose all that apply. 8 - 3n A- eight decreased by the product 3 and a number B- the difference of 8 and the quotient of 3 and a number C- the difference of eight and the product of 3 and a number D- eight less than 3 times ...
*September 17, 2014*

**Math**

A pizza box with a square base is to be made from a rectangular sheet of cardboard by cutting six 1-inch squares from the corners and the middle sections and folding up the sides (see the figure). If the area of the base is to be 144 in^2, what size piece of cardboard should ...
*September 15, 2014*

**computer science**

Thank you!
*September 15, 2014*

**COMPUTER SCIENCE**

Which of the following is a type of software program used to write code and develop other programs. A: a command line interpreter B: the turtle graphics window C: an operating system D: an integrated development environment Please help asap!
*September 14, 2014*

**geometry**

ok thank you! and its fine, i got the answer! :)
*September 13, 2014*

**geometry**

Question 4.4. Which is true about a rotation? (Points : 1) The image and preimage are congruent. The image overlaps the preimage. The image is larger than the preimage. The image is smaller than the preimage. Question 5.5. Trapezoid PQRS was rotated 60° around a point. ...
*September 13, 2014*

**math**

Thank you very much! :)
*September 13, 2014*

**math**

Question 1.1. For each of the following questions, choose the correct answer. What is another word for rotation? (Points : 1) flip turn slide fall Question 2.2. What's another word for a translation? (Points : 1) flip turn slide fall Question 3.3. Maria slides a triangle ...
*September 13, 2014*

**geometry**

Question 1.1. For each of the following questions, choose the correct answer. What is another word for rotation? (Points : 1) flip turn slide fall Question 2.2. What's another word for a translation? (Points : 1) flip turn slide fall Question 3.3. Maria slides a triangle ...
*September 13, 2014*

**nutrition**

umm 600? that is if you write the equation 30% of 2000
*September 12, 2014*

**English 1**

My guess is A, but I'm not completely sure.
*September 12, 2014*

**English 1**

A common theme for each of these selections is? (A Cub Pilot, Barrio Boy, No Gumption, and I Know Why The Caged Bird Sings) a- to become mature, people must learn important lessons from experience b- to govern well, people in authority must treat young people fairly. c- to ...
*September 12, 2014*

**physics**

You have an spring gun. The end of the gun is at 1 meter above the ground. This gun is shoot horizontally with no air resistance. The cannon ball hits the ground 1.32 meters ahead from it was shoot. What is the cannon ball's initial velocity?
*June 14, 2014*

**chem 11**

Calculate the molar concentration of a solution made by dissolving 20.0g of sodium hydroxide to make 300ml of solution.
*May 26, 2014*

**math**

If a number increases from 2,000 to 2,610 what is the rate of increase?
*May 26, 2014*

**Engineering Physics**

which of the following is equal to the angular acceleration of a disk? a)first time derivative of angular position b) second time derivative of angular position
*April 28, 2014*

**math**

So the number of fails is 4.777? How id you get .5?
*March 21, 2014*

**math**

The life of automobile voltage regulators has an exponential distribution with a mean life of six years. You purchase an automobile that is six years old, with a working voltage regulator and plan to own it for three years. a)What is the probability that the voltage regulator ...
*March 21, 2014*

**math**

Area= pi*r^2 2r=d 2r=26 r=13 area=pi*(13)^2=pi*169
*March 21, 2014*

**math**

A)(9/8)/(2/3) can be written as (9/8)*(3/2), by reversing the denominator you can multiply instead of dividing, much easier. so(9*3)/(8*2)=27/16 B)take 1 and 2/3 and make it into a whole fraction. so 3/3+2/3=5/3 Do the same for 2 and 2/3 = 6/3+2/3=8/3 Then (27/16)/(8/3)=(27/16...
*March 21, 2014*

**algebra**

4, because you can't have a zero in the denominator, but you can have one in the numerator that will make the whole equation zero.
*March 21, 2014*

**mat116 algebra**

I'm assuming you solve for x? so 1-5x-4>-3 -5x-3>-3 -5x>0 x<0
*March 21, 2014*

**Probability**

The life of automobile voltage regulators has an exponential distribution with a mean life of six years. You purchase an automobile that is six years old, with a working voltage regulator and plan to own it for three years. a)What is the probability that the voltage regulator ...
*March 21, 2014*

**Probability**

Assume Z has a standard normal distribution. Use Appendix Table III to determine the value for z that solves each of the following: (Round your answer to 2 decimal places.) P(Z<z)=.9 P(Z<z)=.5
*March 21, 2014*

**Probability**

Suppose X has an exponential distribution with . Determine the following. Round the answers to 3 decimal places. a) P(x<=0) b) P(X>=2) c) P(X<=1) d) P(1<x<2) e) Find the value of x such that P(X<x)=.05
*March 21, 2014*

**Math - PreCalc (12th Grade)**

I believe D, because the mean of X~U(a,b) is E(x) =(a+b)/2
*March 21, 2014*

**math**

Two pairs of shoes and four pairs of socks cost $125, and three pairs of shoes and five pairs of socks cost $182. Find the cost of a pair of socks. $
*March 13, 2014*

**math**

Whats the Question?
*February 25, 2014*

**biology**

how can i make my carier in torism
*February 13, 2014*

**english **

Consider the protagonist in the novel that you read this semester. In a response of no fewer than three paragraphs, explain how this character changes over the course of the novel. Include examples of these changes in your response. its over sence and senseability
*December 16, 2013*

**math**

1. Jane has a checkbook balance of $68.00. She then writes two checks, one for $5.00 and one for $62.50. She also deposits $75.00. She then uses her calculator to determine her new balance. Which of the following is the correct series of keys she should press? A. ON/C 6 8 + 7 ...
*October 30, 2013*

**math**

1. Eliza Savage received a statement from her bank showing a checking account balance of $324.18 as of January 18. Her own checkbook shows a balance of $487.38 as of January 29. The bank returned all of the cancelled checks but three. The amounts of these three checks are $15....
*October 16, 2013*

**math**

My 2nd answer for 6th is C, is that correct?
*October 15, 2013*

**math**

1. The product of 7/16, 4/3, and 1/2 is A. 7/12. (B). 7/24. C. 21/32. D. 2 13/48. 2. The total of 36, 78, 198, 475, and 620 is (A). 1,407. B. 2,109. C. 1,731. D. 1,187. 3. The quotient of 794.1 divided by 7.61, expressed to two decimal places, is A. 95.83. (B). 104.35. C. 786....
*October 15, 2013*

**Fluid Mechanics**

Consider a flow whose velocity field is given by u = y, v = −x The streamlines are circles centered at the origin, and this flow is an example of a solid-body rotation. As shown in the figure, a small square fluid element is placed at the point (x,y)=(0,1) at t=0: it ...
*October 11, 2013*

**Chemistry**

Can calcium hydroxide solution be used to distinguish Co(NO3)2 and Fe(NO3)3 solutions using only the titration technique? Why or why not?
*October 5, 2013*

**Chemistry**

Will the 90-100 mL of distilled water added to the acid solution (10.00 mL) significantly change the moles of H3O+ in the 1.00 M HCl solution? Why or why not?
*October 5, 2013*

**physics**

A meteoroid is speeding through the atmosphere, traveling east at 19.5 km/s while descending at 12.7 km/s. What is its speed, in km/s?
*October 2, 2013*

**Chemistry**

57.6 %
*September 23, 2013*

**Please help :(!!**

Your velocity changes from 50 m/s to the left to 10 m/a to the right in 15s, what is your average acceleration?
*September 22, 2013*

**english**

what does "There are a lot of people in the projects who say they're not going to do drugs, that they're not going to drop out, that they won't be on the streets. But they're doing it now. Never say never" mean?
*September 19, 2013*

**INF103: Computer Literacy**

C prompt
*September 17, 2013*

**Elements of Structures MIT 2.02**

2_1_1 2_1_2 2_1_3 2_1_4 Please?
*July 27, 2013*

**Physics**

2_1_1, 1_2, 1_3, 1_4 please?
*July 27, 2013*

**Physics**

2_1_1, 1_2, 1_3, 1_4 please?
*July 27, 2013*

**math**

simplify 27x^2y^6 / 3x^5y^2z^0
*May 30, 2013*

**Math**

A rectangular solid has a volume of 40 cubic centimeters. If the dimensions are all reduced to 1/2 their original size, what will be the new volume of the rectangular solid?
*April 23, 2013*

**math**

THANK YOUUU!! c:
*April 10, 2013*

**math**

so its 132.665 cm squared??
*April 10, 2013*

**math**

a square has an area of 169 square centimeters. find the area of the largest circle that could be drawn inside the square. round your answer to the nearest square centimeter.
*April 10, 2013*

**Physics 203**

A 5m long diving board of negligible mass is supported by two pillars. One pillar is at the end of left of the diving board, the other is 1.50m away. Find the forces exerted by the pillars when a 90kg diver stands at the far end of the board.
*April 9, 2013*

**physics 203**

The figure shows a 1.50kg block at rest on a ramp of height, h. When the block is released, it reaches the bottom of the ramp and moves across a surface that is frictionless except for one section of width 10cm that has a coefficient of kinetic friction uk=0.64. Find h such ...
*April 9, 2013*

**physics 203**

Water (p=1000kg/m^3) enters a pipe on the ground with an inside diameter of 2cm at a pressure of 4x10^5 Pa. Then a 1-cm diameter pipe leads the water to a height of 5m above the ground. The flow speed at the inlet is v1=1.5m/s. A) Find the flow speed at the outlet. B) Find the...
*April 9, 2013*

**Physics 203**

A block with mass of 5.0kg is suspended from an ideal spring having negligible mass and stretches the spring 0.20m to its equilibrium position. A) What is the force constant of the spring? B) The spring is then stretched 0.80m from its equilibrium position and then released ...
*April 9, 2013*

**AP CHEMISTRY**

30.0 mL of 0.10 M Ca(NO3)2 and 15.0 mL of 0.20 M Na3PO4 solutions are mixed. After the reaction is complete, which of these ions has the lowest concentration in the final solution? A) Na+ B) NO3- C) Ca+2 D) PO4-3 Answer is C.. How do you solve it though?!
*April 3, 2013*

**AP CHEMISTRY**

The molar mass of an unknows organic liquid (M~100) is determined by placing 5 mL of the liquid in a weighed 125-mL conical flask fitted with a piece of Al foil with a pin hole in it. The flask is heated in a boiling water bath until the liquid evaporates to expel the air and ...
*March 29, 2013*

**AP CHEMISTRY**

A dilute solution of which acid is most likely to produce a reduction product other than H2 when it reacts with a metal? A)HF B)HCL C)HNO3 D)H2SO4 Answer is C. I know it has something to do with it producing oxygen, but I really don't understand where that comes from. ...
*March 29, 2013*

**AP CHEMISTRY**

Determine the volume of 0.125 M NaOH required to titrate to the equivalence point 25.0 mL of a 0.175 M solution of a monoprotic weak acid that is 20% ionized. Answer is 35.0 mL. How do you find it?! It's been a really long time since we talked about titrations. Please help (:
*March 29, 2013*

**statistics**

Margin of Error=z*(s/sq.root n) 25=2.32635(80/sq.root n) n= 55.4 Round UP= 56
*March 29, 2013*

**AP CHEMISTRY**

OH, thank you soo much. I forgot about the solid thing!
*March 29, 2013*

**AP CHEMISTRY**

C(s) + H2O(g) ⇌ CO(g) + H2 ΔH>0 For the system above at equilibrium, which changes will increase the amount of H2(g)? I. Adding C(s) II. Increasing the volume of the container III. Increasing the temperature The answer is II and III. I understand everything ...
*March 29, 2013*

**arithmetic**

the sum of two distinct numbers is 20,and their G.M is 6. find the numbers
*March 6, 2013*

**Math**

Hi. please help me solve the ffg. differential equation: D^2y=3sinx-4y given y=0 and dy/dx=1 at x=pie/2 Need full solution. Tx
*February 27, 2013*

**Math**

Hi, Please help me solve the ffg. set of simultaneous equations using D-operators: dy/dx+2x-3y=1 dy/dx-3x+2y=e^-t
*February 27, 2013*

**physics 203**

a projectile is thrown with initial speed v0=25.0m/2 at an initial angle with the horizontal ANGLE=45 degrees. a. find the time when the projectile is at the maximum height. b. find the position(x,y) at the maximum height. c. at time T, find the components of the acceleration ...
*February 22, 2013*

**chemistry**

Suppose you have a solution containing both an iron ii salt and an iron iii salt. how would you proceed to identify both Fe 2+ and Fe 3+ in this solution?
*February 12, 2013*

**green lawns**

On reaction with BaCl2 both will form a white ppt. But in the case of H2SO3 the ppt would be soluble in HCl but not in the case of H2SO4
*February 3, 2013*

**English**

Thanks :D You're a life saver
*January 30, 2013*

**English**

1. Which of the key reading skills for reading informational articles involves looking for key words and phrases in a text before reading the text? A. identifying main idea and supporting details B. previewing C. skimming and scanning D. understanding text structures
*January 30, 2013*

**English**

Okay, thanks
*January 9, 2013*

**English**

In other places on the Internet, people have used (Walt Disney Company, Mulan) to cite. Is this acceptable too?
*January 9, 2013*

**English**

How do you cite this quote in MLA format? “The flower that blooms in adversity is the rarest and most beautiful of all.” I'm having issues because the quote is said by Mulan in Walt Disney's "Mulan". Do I say Mulan says it or the Walt Disney Company...
*January 9, 2013*

**Biology**

In a lab on lung capacity where lung volumes (Tidal Volume, Expiratory Reserve Volume, Inspiratory Capacity, Inspiratory Reserve Volume, and Vital Capacity) are measured... Why can't you measure the Inspiratory Reserve Volume (IRV) directly? (In the procedure it says to do...
*January 2, 2013*

**Biology**

In a lab on lung capacity where lung volumes (Tidal Volume, Expiratory Reserve Volume, Inspiratory Capacity, Inspiratory Reserve Volume, and Vital Capacity) are measured... Why can't you measure the Inspiratory Reserve Volume (IRV) directly? (In the procedure it says to do...
*December 31, 2012*

**computers**

coolmathgames(dot)com games(dot)com miniclipgames(dot)com (this one is my fav)
*December 26, 2012*

**english**

Odysseus was BRAVER THAN the rest of the crew [I'm assuming this is what you meant] so he led us TO FOOL Cyclops. He gave some wine to Cyclops to get him drunk. Then Odysseus, a couple of the crew, and *I* stabbed Cyclops in the eye. Also [perhaps THEN or synonyms would be...
*December 9, 2012*

**Grammar**

Can you put (grin) in a sentence where it acts as direct object?
*November 20, 2012*

**Physics**

Mary weighs 459 N and she walks down a ﬂight of stairs to a level 4.7 m below her starting point. What is the change in Mary’s potential energy?
*November 12, 2012*

**Chemistry**

what do you use for the V in PV=nRT?
*November 8, 2012*

**Chemistry**

15.8 grams of potassium chlorate is decompossed and the gas is colected over water at 29 degrees celcius when water vapor pressure is 30 mmHg. Assuming 100% yeild of products, what is the total pressure in the vessel after the reaction in complete?
*November 8, 2012*

**Chemistry**

(2*-393.5+4*-242)-(2*-293+0) Delta H+ -1169 kJ/mol
*November 8, 2012*

**Math-Quartic Equation**

Reduce this equation using the quadratic formula, factoring, or other algebraic method to determine the other zeros of the function. F(x)= 4x^4 - x^3 - 11x^2 -2x +6
*October 28, 2012*

**world history**

Which of the following provides the most significant contrast to the feelings of the detained Chinese immigrants at the Angel Island Immigration Center in California? A.The feelings of the Chinese immigrants at Ellis Island. B.The feelings of the Europeans immigrants at Ellis ...
*October 26, 2012*

**algebra**

A train leaves the station at 9:00 pm traveling east at 36 miles per hour. A second train leaves the station at 10:00 pm traveling west at 42 miles per hour. At what time will both trains have traveled the same distance? I need help solving it :)
*October 4, 2012*

**math**

A train leaves the station at 9:00 pm traveling east at 36 miles per hour. A second train leaves the station at 10:00 pm traveling west at 42 miles per hour. At what time will both trains have traveled the same distance? I need help solving it :)
*October 4, 2012*

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