Thursday

September 3, 2015
Total # Posts: 473

**Physical Science- Atomic Structure**

An electron jumps from energy level 1 to energy level 2 by absorbing a photon of energy 8 eV. What is the most likely energy of the photon that will be emitted by the electron when it moves back down to energy level 1? 2 eV 4 eV 8 eV 12 eV
*August 12, 2015*

**math**

|x^{2}-16x+56| = -4x-7 what does x equal?
*August 8, 2015*

**statistics**

a private opinion poll is conducted for a politician to determine why proportion of the population favors decriminalizing marijuana possession. how large a sample is needed in order to be 90 percent confident that the sample proportion will not differ from the true proportion ...
*June 15, 2015*

**Algebra**

For the following equation of a hyperbola determine the center, vertices, foci, and asymptotes? 36x^2-y^2-24x+6y-41=0
*May 4, 2015*

**Algebra**

how do you determine vertices?
*May 4, 2015*

**chemistry**

At a certain temperature, the Kp for the decomposition of H2S is 0.734.Initially, only H2S is present at a pressure of 0.102 atm in a closed container. What is the total pressure in the container at equilibrium?
*April 24, 2015*

**History**

Yea you are right I have no idea why it is called open study you can't even ask questions from your test or study's xD
*April 15, 2015*

**Biology**

sorry the last one go cut off.. and was wrong one A man and his wife both have normal vision, but a daughter who has color blindness can the man sue his wife for infidelity?
*February 20, 2015*

**Biology **

need help quickly please If barred pattern on chicken wings is a sex linked trait, set up a cross (hen and rooster), in which they the newly hatched chicks can be determined as male or female based on the barred pattern. and Color Blindness is inherited as a sex linked ...
*February 20, 2015*

**Biology**

Color Blindness is inherited as a sex linked recessive. If a color blind woman marries a man with normal vision, what would you expect in their children? Show a cross I put that X- x- Xx x-
*February 19, 2015*

**Math**

Adam wants to compare the fractions 2/5, 1/6 and 1/3. He wants to order them from least to greatest and rewrite them so they all have th same denominator. Explain how Adam can rewrite the fractions.
*February 9, 2015*

**MATH **

The length of Super Bowl commercials is said to be Normally distributed with a mean of 36 seconds and standard deviation of 8 seconds. a. Find the probability that a randomly selected Super Bowl commercial is shorter than 45 seconds? (2 points) b. Find the probability that a ...
*February 2, 2015*

**physics**

a rock is thrown vertically upward from ground level at t=0. At t= 1.5s, it passes the top of a tall tower and 1.0 s later, it reached its maximum height. what is the height of the tower?
*February 2, 2015*

**Math**

Also, I don't think they are parallel because if it's parallel then it would be equal and the angles *124 and 118* are not equal.
*January 27, 2015*

**Math**

Sorry I was trying to explain the picture. They are consecutive interior angles
*January 27, 2015*

**Math **

1. is line "L" parallel to line "M"? *picture of a transversal.. lines L and M don't touch and one line crosses through line L and M to create a transversal. angles 124 and 118 are on the bottom left side of the transversal* I tried my best to explain ...
*January 27, 2015*

**Math**

Okay. So, I would've chosen the right answer if I understand the question. Thanks Ms. Sue!
*January 27, 2015*

**Math**

find the sum of the interior angles of a nonagon. I know a nonagon has 9 sides.. A. 140 degrees B. 1,620 degrees C. 1,260 degrees D. 1,450 degrees If the question is asking for each interior angle then I think the answers A but if it's asking for the sum of ALL the ...
*January 27, 2015*

**S.S**

Ms. Sue, is it C?
*January 23, 2015*

**S.S**

Whose mill launched the factory system? A. James Monroe B. Eli Whitney C. Samuell Slater D. Francis Cabot Lowell I think it's D.. am I right?
*January 23, 2015*

**science**

explain an animal cell in your own words and two things each part does
*January 18, 2015*

**Health**

Oh okay.. that's what I thought at first. I can answer the question now. Thank you
*January 11, 2015*

**Health**

When it says "within your control" is that saying not in my control ?
*January 11, 2015*

**Health**

Two key components to keeping your heart healthy that are within your control are exercise and.. A. diet B. Rest C. heredity D. enviroment I think it's B.. am I right?
*January 11, 2015*

**language arts**

Oh Oh Oh is it C then?
*January 6, 2015*

**language arts**

read the following lines of dialogue from a coversation johnny has with mrs. bessie, the lytes servant. "what happened to that Cousin Sewall?" "Gone to Worcester. Joined up with the Minute Men." "But hes too fat and.." "Soft? No. From now on ...
*January 6, 2015*

**math **

how do I rearrange the equation a=d/t if I want to find d?
*December 1, 2014*

**math**

a cyclist is travelling with an average velocity of 5.9m/s [w]. what will be his displacement in 1.5 h? please show steps to answer-I tried but couldn't find the answer :(
*December 1, 2014*

**Physics**

bob drop a rock from a height of 4.5 m. (the acceleration due to gravity is 9.8 m/s^2) 1.at s the initial speed of the rock 2. how long is the rock falling before it hits the ground c. what is the final speed of the rock? [I have trouble with c) My work: a) v1 =0m/s b) v1t +1/...
*December 1, 2014*

**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*

**Science**

Thanks a lot i got all the answers correct
*May 19, 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*