Wednesday

May 27, 2015

May 27, 2015

Total # Posts: 1,715

**Physics**

A 5.0cm tall object is placed 16cm from a convex lens with a focal length of 8.4cm. What are the image height and orientation?
*May 19, 2015*

**physics**

a convex mirror has a focal length of -10.0cm. what is the image position for an object that is placed l20.0cm from the mirror?
*May 19, 2015*

**physics**

marco pushes a stalled car 20 meters with a constant force of 500N in 50 seconds. Calculate the average power marco required to move the car.
*May 19, 2015*

**physics**

how much work is done lifting a 75 kg child 1.75m?
*May 19, 2015*

**physics**

In a tug of war match, each side pulls with a force of 500N, but the rope does not move. How much work is done?
*May 18, 2015*

**Chemistry - Equilibrium**

(h) If a catalyst was added to the reaction, which quantities would change? (Select all that apply.) - the potential energy of the products - the potential energy of the reactants - the potential energy of the activated complex -the activation energy for the reverse reaction...
*May 17, 2015*

**physics**

a car rounds a curve with a radius of 45.0 m at a speed of 22.0 m/s. What is the centripetal acceleration of the car? please show work
*May 15, 2015*

**Trig Identities**

Thank you so much! I understand it now.
*May 12, 2015*

**Trig Identities**

Prove the following identities: 13. tan(x) + sec(x) = (cos(x)) / (1-sin(x)) *Sorry for any confusing parenthesis.* My work: I simplified the left side to a. ((sinx) / (cosx)) + (1 / cosx) , then b. (sinx + 1) / cosx = (cos(x)) / (1-sin(x)) I don't know how to verify the ...
*May 12, 2015*

**Math**

Give three additional polar coordinate pairs for the Point B: (-3,2π/3). -2 < π < 2
*May 12, 2015*

**Math**

A 12 foot-high pole casts a 9 foot long shadow, at the same time of day, what would be the length of a shadow cast by a 45 foot-long tree
*April 7, 2015*

**Physics. URGENT Help Please**

The last question is. 355 nm b/c 440/1.24= 355 but I still need help on the other questions please
*April 2, 2015*

**Physics. URGENT Help Please**

What is the separation of colors in a rainbow produced by? (Points : 1) different diffraction for different wavelengths different interference for different wavelengths <--- different refraction for different wavelengths difference in total internal reflection for ...
*April 2, 2015*

**Statistics**

The Economic Policy Institute periodically issues reports on wages of entry-level workers. The institute reported that entry-level wages for male college graduates were $21.68 per hour and for female college graduates were $18.80 per hour in 2011 (Economic Policy Institute ...
*March 23, 2015*

**Biology**

Would an atom of silicon form an ionic bond with an atom of helium? Why or Why not?
*March 8, 2015*

**Biology**

I believe they should stop as well, but the only reason can come up with is the example of cars and electric cars now
*February 27, 2015*

**Biology**

Do you think that the countries producing sulfur dioxide emissions should compensate their neighbors for the damage being done?
*February 27, 2015*

**Math**

If x=<-6,21>, then 1/3x= Write the final answer in <x,y> form.
*February 25, 2015*

**Homework (Math)**

I know that I'm using the Law of Cosines, but I'm confused on how to solve. I have to also round my answers to the nearest tenth for degrees and to the nearest hundredth for sides. Given: A= 55 degrees b=3 c=10 Find: a= B= C=
*February 25, 2015*

**Math Check**

Can someone check to see if I'm right? Thanks! Question: Determine if v and w are equal If v = Ray AB and w = Ray CD, where A (23, 11), B (10, 15), C (13, 15), and D (0, 11. (True or False) My answer: False
*February 25, 2015*

**math**

Find the limit. lim x→∞ sqrt(x^2+9)
*February 11, 2015*

**English 2**

In Our Town, by Thorton Wilder, what does the rain symbolize?
*February 9, 2015*

**Physics**

When going up stairs does a person who has more mass do more work and exert more power?
*February 9, 2015*

**Social studies (ms.Sue I really need your help)**

Is it A
*February 4, 2015*

**Social studies**

Which of the following increased south Carolina's desire to secede from the union? A.John Brown's raid on Harpers Ferry*** B.Brooks' response to summer's speech C.the proslavery constitution submitted by Kansas D.the decline of the Whig party
*February 4, 2015*

**Art check please**

Oh nice I bet that was a sight to see! Thank you so much
*January 23, 2015*

**Art check please**

Is #2 B I read somewhere that they couldn't be viewed but it doesn't give a clear answer in my lesson about this one Thanks
*January 23, 2015*

**Art check please**

1. Rust on an artifact is an example of (1 point) chemical decomposition ******* chemical preservation physical decomposition physical preservation 2. What “preservation controversy” developed over the years relating to Michelangelo’s paintings in the Sistine ...
*January 23, 2015*

**chemistry**

What mass of KBr is contained in 50.0 mL of a 5.10 M solution of KBr?
*January 23, 2015*

**English**

Oh I am sorry I thought it was wanting a metaphor Urban is City correct?
*January 22, 2015*

**English**

In these lines from concrete mixers which context word provides a synonym for urban concrete mixers are urban elephants, Their trunks are raising a city a)Concrete b)Elephants ******THIS ONE**** c)raising d)city
*January 22, 2015*

**ART HAVING HARD TIME**

Thank you so much
*January 22, 2015*

**ART HAVING HARD TIME**

Would you think #2 for question 5 then I honestly am confused on this one
*January 22, 2015*

**ART HAVING HARD TIME **

1. A curator decides to display an eighteenth-century painting in a windowless room with controlled temperature and humidity. Pick the answer that best describes the reasons for her choice: (1 point) 1)The curator wants to make sure that the temperature and humidity are ...
*January 22, 2015*

**PHYSICS**

The driver of a car traveling at 25.0 m/s applies the brakes and undergoes a constant negative acceleration of magnitude 2.50 m/s2. How many revolutions does each tire make before the car comes to a stop, assuming that the car does not skid and that the tires have radii of 0....
*January 15, 2015*

**history**

Question 2 (04.05 MC) Using the map and your knowledge of U.S. history, what do the details of the Rocky Mountains suggest about the Lewis and Clark expedition? The group made a grave mistake in not turning back in Missouri. The group really could have traveled by river all ...
*January 12, 2015*

**math**

In a scale drawing of a house, the living room is 1 in. long. The actual length is 24 ft. The actual width of the living room is 18 ft. The width on the drawing is __________ in. (Find the width on the drawing). Show your work in every step to receive full credit.
*January 9, 2015*

**math problem solving **

points p and q are trisection points on segment ab. if aq= 7x+6 and pq= 3x+5 find all possible values for the length of ab
*January 5, 2015*

**Math**

points p and q are trisection points on segment ab. if aq= 7x+6 and pq= 3x+5 find all possible values for the length of ab?
*January 5, 2015*

**Algebra 1**

2x(3xy + 4y² + 8y) 6x²2xy + 2x4y² + 2x8y 12x² + 10y²
*December 30, 2014*

**math algebra**

Mauryn wrote the following Sandwiches at king sandwich cost same amount and include bread, meat, cheese, lettuce, and tomato. All other veggies are extra. Sam bought a chicken sandwich with 3 extra veggies for $5.25. Erin bought roast beef sandwich with 5 extra veggies for $6....
*December 18, 2014*

**math algebra**

The length of the diagonal across the front of a rectangular box is 25 inches, and the length of the diagonal across the side of the box is 20 inches. The length of a 3 dimensional diagonal of the box is 28 inches. What is length of the diagonal across the top of box? A. 15.5 ...
*December 18, 2014*

**math algebra**

Wasn't putting 0 in for slope... thanks
*December 18, 2014*

**math algebra**

What is slope of line 8y = -16? a. 0 b. 2 c. 16 d. undefined dont have a clue how to do this
*December 18, 2014*

**math algebra**

Thanks, could get 7 , but didn't know what to do after...
*December 18, 2014*

**math algebra**

What is y intercept of equation represented: X Y 150 1047 125 872 100 697 75 522 a. -3 b. 0 c. 3 d. 172 I come up with totally different answers than these. Do you use the y2-y1/×2-×1 ?
*December 18, 2014*

**Language Arts Check please**

How has the political climate of boston changed since the beginning of the book? A. Previously, Bostonians considered themeselves loyal british subjects, but after parliament pass the tea act, they thought of themeselves as citizens of an independent nation B. Previously, ...
*December 17, 2014*

**English**

Would someone please help with this one! I believe it to be C as well from Johnny Tremain but would love some reassurance Thanks :)
*December 16, 2014*

**math algebra**

A rectangular box has a length of 8 ft and a width of 2 ft. The length of the three dimentional diagonal is 10 ft. What is the height of the box? I think answer is 12.96, but not sure. any help is appreciated thanks in advance
*December 15, 2014*

**ART HELP PLEASE**

Thanks
*December 10, 2014*

**ART HELP PLEASE**

C though says lack of light usage right?? So that's what threw me off
*December 10, 2014*

**ART HELP PLEASE**

Thanks DerpyPegasus
*December 10, 2014*

**ART HELP PLEASE**

This one too The Dance lesson by Edgar degas edgar degas is an artist who is associated with impressionism. By allowing the windows to be included in the scene, Degas created this art piece in such a way that the viewer was distracted from the individuals there was no clearly ...
*December 10, 2014*

**ART HELP PLEASE**

the railway by edouard manet One of the characteristics of impressionism, which is pictured here, is? formal portraits dark color theme lack of attention to light usage capturing the human experience (I thought this one) Not sure though
*December 10, 2014*

**language arts**

The answers for these two and third one are A, D, A
*December 9, 2014*

**language arts**

Did you get theses done?
*December 9, 2014*

**language arts**

Its C
*December 9, 2014*

**chemistry**

Naturally occurring reactions of oxygen (O2) are always desirable. True or False
*December 6, 2014*

**chemistry**

When the following equation is balanced, what is the coefficient for Ta? H2 + Ta2O3 → Ta + H2O
*December 6, 2014*

**Math Calculous**

Find a possible formula for a polynomial f with the following properties. f has degree less-than-or-equal-to 2, f(0) = f(3) = 0 and f(5) = 30 f(x) = ? k(x+0)(x+0)(x-3) I know the zeroes for 3 of them are 0, 0, 3, how would i find out the rest?
*December 5, 2014*

**Math calculous**

x 1 2 3 4 h(x) 7 20 43 76 x = 1 h(x) = 7 x = 2 h(x) = 20 x = 3 h(x) = 43 x = 4 h(x) = 76 Using the table or in this case information for the polynomial function of the degree 2 Find the formula for h(x) h(x) = ?
*December 4, 2014*

**Chemistry**

0.15 grams of benzene (C6H6) is dissolved into 4.7 grams of melted biphenyl. The freezing point of the mixture was determined to be 4.7 degrees below the freezing point of pure biphenyl. Based on these results, what is the Kf of biphenyl? (Use the standard units in your ...
*November 25, 2014*

**Math Check please**

Suppose c is inversely proportional to the square of d. If c = 4 when d equals 3.find the constant of proportionality and write the formula for c as a function of d c= 36/d^2 use your formula to find c when d is 5. is it 100/d2 or 100/5^2? I know the formula is c=k/d^2 c = ?
*November 21, 2014*

**Math**

f(x) = 3x^2 , g(x) = 3x-1, and m(x) = 4x Find and simplify the composition function g(m(f(x))) answers i got which were wrong 3x-1(12x^3) 36x^4-12x^3 Maybe i am putting the information in incorrectly.. Should it look like this (3x^2(4x(3x^2))) then solve?
*November 21, 2014*

**Econ (International Monetary System)**

Suppose Switzerland is on the gold standard and it maintains a strict ratio of gold in its vaults to money (Swiss francs) in circulation. Suppose that it runs a balance of payments deficit. What will happen to its overall money supply? What impact will this have on the Swiss ...
*November 19, 2014*

**Alegbra 2**

Solve each equation using the Quadratic Formula. x^2+16=8x
*November 17, 2014*

**Alegbra 2**

Solve each equation using the Quadratic Formula. 2x^2+3=7x
*November 17, 2014*

**Alegbra 2**

Solve each equation using the Quadratic Formula. 3x^2+5x=2
*November 17, 2014*

**Alegbra 2**

PLEASE HELP!!!!!!!!!!!!!!!!!! Solve each equation using the Quadratic Formula. x^2+12x+35=0
*November 17, 2014*

**Algebra**

Al¡¦s Rentals charges $25.00 per hour to rent a sailboard and a wet suit. Wendy¡¦s Rentals charges $20.00 per hour plus $15.00 extra for a wet suit. Find the number of hours for which the total charges for both companies would be the same. ƒ&...
*November 15, 2014*

**Math **

This one confused me since it revolved around what seemed like dividing trig function by another function Write the following expression in terms of the tangent function 2 / ((cos(r^2 - s^2) / (sin(r^2 - s^2)) = ? I know tan t = sin t / cos t. So would I multiply by the ...
*November 14, 2014*

**Algebra 2**

Hey, I have another question. this I just don't understand. I'm really starting to get very confused!!! PLEASE HELP!!!!! Solve each equation by factoring. Check your answers. 3x^2+45=24x
*November 13, 2014*

**Algebra 2**

Hey, I don't understand this question I have honestly done this question about a good 3 times but never seemed to get the right answer. Please Help!!! Solve each equation by factoring. Check your answers. 7x^2=21x
*November 13, 2014*

**algebra**

Tom invests $10,000 into two accounts, one paying 2% interest per year and the other paying 5% interest per year. He invested 3 times as much in the account paying 5% than in the account paying 2%. how much interest will he ear in one year?
*November 12, 2014*

**algebra**

An exponential function passes through the points (2,3), (9,33), (15,K). What is the value of K?
*November 12, 2014*

**intermediate algebra**

two perpendicular lines intersect at (2,3) one of the lines has an x-intercept of 2. what are the equations of both lines?
*November 12, 2014*

**Intermediate algebra**

It is a question on my algebra homework!
*November 12, 2014*

**Intermediate algebra**

How many quarts of water must be mixed with 8 quarts of a 25% salt solutions to obtain a 17.5% salt solution?
*November 12, 2014*

**College engineering**

A prismatic bar has length L = 2m and a circular cross-section with diameter d = 50 mm. A tensile load is applied which causes thhe bar to extend by ∂ = 1.4 mm. a) Find the normal strain. b)If the elastic modulus is 200 GPa, find the applied aal tensile load P. I got ...
*November 11, 2014*

**algebra**

Give an equation of a line in slope intercept form that would be parallel to the equation y=3x+5 and passes through (0,3).
*November 6, 2014*

**Algebra 2**

A path of uniform width surrounds a rectangular garden that is 5m wide and 12m long. The area of the path is 168m^2. Find the width of the path.
*November 4, 2014*

**Algebra 2**

Dymond is painting a rectangular banner for a football game. She has enough paint to cover 120 ft^2. She wants the length of the banner to be 7 ft longer than the width. What dimensions should Dymond use for the banner?
*October 31, 2014*

**Business Law**

Any breach of contract discharges the breaching parties. True or false
*October 31, 2014*

**Physics**

Jeron has a tendency to drop his bowling ball upon release when bowling. Instead of having the ball on the floor at the completion of his swing, Jeron lets go of the ball 0.35m above the floor. If he throws the ball with a horizontal velocity of 5.3m/s, what distance does it ...
*October 31, 2014*

**Physics**

Alexis Farias realizes her dream to play golf on the moon. She hits a golf ball with an initial velocity of 23.5m/s at an angle of 35.0 degrees above the horizontal. The acceleration due to gravity on the moon is 1.67m/s^2. A). How long is the golf ball in the air? B). How far...
*October 31, 2014*

**Physics**

Alexis Farias realizes her dream to play golf on the moon. She hits a golf ball with an initial velocity of 23.5m/s at an angle of 35.0 degrees above the horizontal. The acceleration due to gravity on the moon is 1.67m/s^2. A). How long is the golf ball in the air? B). How far...
*October 31, 2014*

**Math Arc Length**

Find the arc length corresponding to an angle of a degrees on a circle radius of 4.9 Enter the exact answer. I put the arc length was 4.9api/180 got it wrong. Any help?
*October 31, 2014*

**physics help!**

Two springs P and Q both obey Hooke’s law. They have spring constants 2k and k respectively.The springs are stretched, separately, by a force that is gradually increased from zero up to a certain maximum value, the same for each spring. The work done in stretching spring ...
*October 28, 2014*

**math algebra**

A new shopping is opening this month.before agreeing to open shops, store managers had toconsider monthly rent and whether to pay one time fee to put shop name on sign in front of store. Kikis kupcakes number of months total rent paid 2 9700 5 16750 8 23800 10 28500 12 33200 ...
*October 23, 2014*

**AS ORGANIC CHEM**

An organic compound, X, will react with an excess of calcium metal to produce a salt with the empirical formula CaC4H6O4. What could be the identity of X? 1 ethanoic acid 2 butanedioic acid 3 methylpropanedioic acid With explanation please!
*October 22, 2014*

**Precalc (domain and range)**

Domain l(x) is -12 less than or equal to x less than equal to 12 and it's range is 0 less than or equal to l(x) less than equal to 3 (b) What are the domain and range of l(1/5x) Enter the exact answer Domain Range
*October 17, 2014*

**Science**

Thank you for helping me
*October 16, 2014*

**Science**

By telling me the answer to the question and then I can actually put it in my own word.
*October 16, 2014*

**Science**

.Define the following terms and provide a example of each: -atom, - compound, - element, -energy, - photosynthesis, -matter, - decomposition. Write it in your own words. . Explain the forms of energy: radiant, chemical, mechanical, electrical, thermal. . What is a food chain...
*October 16, 2014*

**chemistry**

A mixture containing 2.81 g each of CH4 (g), C2H4 (g) and C4H10 (g) is contained in a 1.50 L flask at a temperature of 35 oC. What is the partial pressure (in atm) of C4H10 (g)?
*October 13, 2014*

**MATH (STATS)**

To determine the views of a students on a particular campus about fraternities, an 11-point attitude scale was administered to a random sample of 40 students. This survey yielded a sample mean of 6 (the higher the score, the more favorable the view of the fraternities) and a ...
*October 8, 2014*

**math**

3+(-4)
*October 8, 2014*

**Sociology (Stats) Std. Dev**

Given (μ) = 500, and σ = 100. What percentage of the SAT scores falls: A) Between 500 and 600? The percentage falls 1 σ above the (μ), 68.26% / 2 = 34.13% B) Between 400 and 600? The percentage falls 1 σ below and 1 σ above the (μ) C) Between...
*October 8, 2014*

**Social studies**

Ms.sue
*October 7, 2014*

**Social studies**

Yes I mean the commons house of assembly in the South Carolina was more democratic by?
*October 7, 2014*