Monday

March 2, 2015

March 2, 2015

Total # Posts: 2,561

**delftx**

For Question 1: 2440 Total PV output = 1000W/m2×18%×10m2=1800W PV module costs = 1800W×€0.8/Wp=€1440. Non-modular costs = €100/m2×10m2=€1000. Total cost = PV module costs + non-modular costs = €2440.
*September 29, 2013*

**chem**

How many grams of NH3 are required to make 52.7g H2O in the following reaction : 4NH3+6NO->5N2+6H2O
*September 28, 2013*

**chem**

Correction!! in the question its **12CO2**
*September 28, 2013*

**chem**

Help a brother out!!! please!!!Nitroglycerin, C3H5N3O9 decomposes to form N2,CO2,H2O, and O2 4(C3H5N3O9)-> 6N2+12O2+10H20+O2 a)How many grams of water would be produced if 75g of nitroglycerin decompose? b)The creation of 3.89 moles of C02 would require how many grams of ...
*September 28, 2013*

**us history**

Compare and contrast the goasl and strategies of the Reconstruction of TWO of the following -President -Lincon -Johnson -Congressional Republicans
*September 26, 2013*

**us history**

Describe the long-term political and economic effects of the Reconstruction and southern reaction on African Americans
*September 26, 2013*

**us history**

Explain whether slavery or representation was the main cause of disunion. You may incorporate two of the following to support your answer -The Missouri Compromise -The Free-Soil Movement -Compromise of 1850 -Kansas-Nebraska Act, 1854 -Bleeding Kansas Dred Scott v. Sandford
*September 26, 2013*

**us history**

Analyze the ways that the Free-Soil movement influenced U.S politics from 1820-1860. Explain the significance of this movement.
*September 26, 2013*

**physics**

if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?
*September 25, 2013*

**physics**

if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?
*September 25, 2013*

**physics**

if you are stuck in the middle of a frictionless frozen lake with only your backpack, how can you get back safely to solid ground?
*September 25, 2013*

**Biology**

False
*September 21, 2013*

**computers**

Networks are often set up in the client/server network arrangement. Raheem has learned that this is a very common type of network arrangement. Discuss two things that Raheem should be concerned with if he decided upon a client/server network arrangement?
*September 18, 2013*

**Algebra**

It was such a vile inn
*September 17, 2013*

**geometry**

If BC = 16 and AC = 29, find AB.
*September 11, 2013*

**mitx 8.01x Classical Mechanics**

4.981
*September 10, 2013*

**college math**

lol this isn't "college math"; but the answer otherwise is 63+6 because(-9)(-7)=63
*September 8, 2013*

**college math**

answer is -25
*September 8, 2013*

**Math**

Alright I got it thanks so much!!
*September 8, 2013*

**Math**

Okay, I'm in a calculus class but stuck on some algebra...it's not crucial that I get the answer to this but I'm wracking my brain because I can't remember how the following is obtained; if you can show me how this is done in steps I'd greatly appreciate it...
*September 8, 2013*

**Statistics / Business**

According to the National Humane Society, "Stray Cost" or the cost of the care and feeding for a stray dog is $419.00 per year. This amount does not include veterinarian care, but only food, water and shelter. It was found that the standard deviation of this "...
*September 8, 2013*

**law**

Yes there are some issues
*September 7, 2013*

**computer science**

Write the " 7−2" expression so that no answer includes negative exponents. Assume the variables are nonzero
*September 6, 2013*

**main ideas**

Scientists generally agree that Earth is getting warmer due to what's called the greenhouse effect. A greenhouse used for plants stays warm because sunlight and heat coming through the glass roof are mostly trapped. The heat doesn't radiate back into the atmosphere ...
*September 6, 2013*

**algebra 1**

the monkey stole my banana
*September 6, 2013*

**chemistry**

4.0*10^-6
*September 1, 2013*

**Health**

what is it
*August 22, 2013*

**PSP**

The sentence "P ¨ Q" is read as (Points : 1) P or Q P and Q If P then Q Q if and only
*August 21, 2013*

**math**

Find the remainder when 33! is divided by 37. Please give full solution.
*August 12, 2013*

**eng**

Imagine that there is a fire in your house or apartment, and you only have 5 minutes to grab your possessions and get out. Everything you leave behind will be destroyed. What would you grab? Why? When you think about what you left behind, are you sad that you lost it or happy ...
*August 9, 2013*

**statistic**

A die is rolled 600 times. The face with six spots appears 112 times. Is the die biased towards that face, or is this just chance variation? The null hypothesis is: he null hypothesis is The die is biased towards the face with six spots. The chance that the face with six spots...
*July 31, 2013*

**problem solving**

How much space does the dining area take up? 100 guests, each guest requires 3m2 in the dining area, the average mass of each guest is 65 kg, and the average density of the dining area is 10kg/m2 How I can resolve this problem?
*July 28, 2013*

**problem solving**

100 guests each guest needs 3 m2 of space average density of the area is 10kg/m2. how much space does the dining room take up?
*July 28, 2013*

**Physics (help steve)**

A thin aluminum ring hangs vertically from a torsion spring. A torsion spring when twisted exerts a restoring torque given by τ=−κθ where θ is the angle of twist. Suppose that the ring undergoes small torsional oscillations while it is being cooled ...
*July 5, 2013*

**physics**

In the following figure m_1 = 20.0kg kg and á alpha = 50.9 ∘ ^\circ. The coefficient of kinetic friction between the block and the incline is ì k = 0.40 What must be the mass m 2 of the hanging block if it is to descend 9.00m m in the first 3.00s s after ...
*July 4, 2013*

**Math (please help steve)**

The Chicago Art Museum's Renaissance display consists of four hallways bordered around a square courtyard. A single guard is assigned to patrol the four hallways. When the guard starts working, he begins in one of the corners and walks clockwise. When he arrives at a ...
*July 1, 2013*

**Calculus (help steve)**

But thanks for all the help.
*June 28, 2013*

**Calculus (help steve)**

It's not right either. I know, I'm stumped too.
*June 28, 2013*

**Calculus (help steve)**

Thanks Steve. But apparently, that's not the right answer, since a and b are not local minimum and maximum values.
*June 28, 2013*

**Calculus (help steve)**

f(x)=−8x^3+6ax^2−3bx+4 has a local minimum at x=1 and a local maximum at x=3. If a and b are the local minimum and maximum, respectively, what is the absolute value of a+b?
*June 28, 2013*

**Math (Limits)**

(1,0) is a point on the parabola y=2x(x−1). From point A, point P is moving along the curve towards the origin O(0,0). As P→O, sec^2∠APO→N, where N is a positive integer. What is the value of N?
*June 27, 2013*

**Math (Calculus)**

A(1,0) is a point on the parabola y=2x(x−1). From point A, point P is moving along the curve towards the origin O(0,0). As P → O, sec^2∠APO → N, where N is a positive integer. What is the value of N?
*June 27, 2013*

**Physic**

please check your question, kinetic energy is not measured in kg, it's measured in joules
*June 27, 2013*

**physics**

1/2mv^2=1/2(8)(12)^2=576
*June 27, 2013*

**math**

Anne wants to tie a support line from the top of a 50 foot radio tower to an anchor spot 30 feet from the tower’s base. Approximately how long will the line need to be?
*June 20, 2013*

**Math**

Determine the digits of Y from these clues. The digits of Y add to 18. The first digit is 3 times the third digit. The second digit is 2 times the third digit. Y is a three digit number.
*June 18, 2013*

**Physics**

Optical fibers are devices used for guiding light in many applications, most notably for fast communication. A fiber consists of a glass cylinder surrounded by a wall covered in a special coating. The fibers work on a principle called total internal reflection: light enters ...
*June 18, 2013*

**Math**

835
*June 18, 2013*

**Math**

Thanks
*June 18, 2013*

**Math**

γ is a permutation on eight elements, though you are not told which permutation it is. If γ is applied to an 8-element set, what is the minimum number of additional timeswe must apply γ to the resulting set in order to guarantee the set is back in its original ...
*June 18, 2013*

**Math**

ABC is a triangle with ∠BAC=60∘. It has an incircle Γ, which is tangential to BC at D. It is given that BD=3 and DC=4. What is the value of [ABC]^2?
*June 17, 2013*

**Math**

In first gear, or low gear, an automobile's engine runs about three times as fast as the drive shaft. In second gear, the engine does not have to run as fast; usually it runs about 1.6 times faster than the drive shaft. Finally, in third, or high gear, the engine runs at ...
*June 17, 2013*

**Math**

I = E/R A car has a 12 volt battery. The engine has a resistance of 0.22 ohms. How many amps will be drawn from the battery when the key is turned? I (to the nearest hundredth) = amperes
*June 17, 2013*

**Math**

plz answer it, i need to know by tonight
*June 14, 2013*

**Math**

Triangle ABC has ∠A=40∘, ∠B=60∘, ∠C=80∘. Points M,N trisect the side BC and points P,Q trisect the side AC. The lines AM,AN,BP,BQ intersect at the points S,T,U,V as shown in the figure below, dividing the triangle into 9 regions. Determine ...
*June 14, 2013*

**physics**

According to the Guinness Book of World Records, the longest home run ever measured was hit by Roy “Dizzy” Carlyle in a minor league game. The ball traveled 188 {\rm m} (618 {\rm ft}) before landing on the ground outside the ballpark part a Assuming the ball's ...
*June 14, 2013*

**math**

how do you add, subtract, multiply, and divide fractions
*June 12, 2013*

**English**

She could have been an Olympic figure skater, but she has quit practicing. What is the linking verb in the sentence?
*June 12, 2013*

**Physics**

While Driving Around A Curve Of 200 M Radius, You Notice That The fuzzy dice Hanging From The Rear-view Mirror Hangs At An Angle Of 15 Degree To The Vertical. 1.) What is the force diagram for the dice? 2.) What are the equations of motion in the horizontal and vertical ...
*June 11, 2013*

**law**

thank you for being so specific
*June 9, 2013*

**law**

what does it mean when Steven said The case has nothing to do with 'disagreeable ideas' in the Texas v Johnson case?
*June 9, 2013*

**math**

sorry for before it is my first time using this website and this is the real question in a geometric series t1=23,t3=92 and the sum of all of the terms of the series is 62813. How many terms are in the series?
*June 3, 2013*

**math**

in a geometric series t1=23,t3=92 and the sum of all of the terms of the series is 6813. How many terms are in the series
*June 3, 2013*

**math**

In a geometric series, t1=12 and s3=372.what is the greatest possible value for t5?
*June 3, 2013*

**geometry**

the surface areas of two similar solids are 340 yd2 and 1158 yd2 the volume of the larger solids is 1712 yd3 what is the volume of the smaller solid?
*May 30, 2013*

**math**

find two numbers in the ratio of 2 to 5 that have a sum of 119.
*May 28, 2013*

**Math**

resolve the vector v=[7, 9] into rectangular components, one of which is in the direction of [6, 2]
*May 27, 2013*

**Math**

Name 3 consecutive odd integers (X,X+2,X+4) The difference between 2X and X+4 =(X+2)-24 Can you show HOW to solve?
*May 24, 2013*

**Social Studies**

#2-C #3-D
*May 24, 2013*

**algebra!!!! please help me!!!!**

@Steve it's not √2+√3+√5,,, it's √(2+√3+√5)...
*May 22, 2013*

**algebra!!!! please help me!!!!**

A number is called algebraic if there is a polynomial with rational coefficients for which the number is a root. For example, √2 is algebraic because it is a root of the polynomial x^2−2. The number √(2+√3+√5)is also algebraic because it is a root...
*May 22, 2013*

**statistics**

So, trying to cheat on your edx exam? You'll only feel bad. Go back to the notes and work it out.
*May 18, 2013*

**LA**

help please
*May 16, 2013*

**LA**

I don't know:(
*May 16, 2013*

**LA**

2.what is the description of the theme of article lottery winners who lost their millions? A: many lottery winners have lost their money. B:money is the key to the American dream. C: sudden wealth can cause problems.
*May 16, 2013*

**math**

Idk
*May 14, 2013*

**physics**

A person takes a trip, driving with a constant speed of 92.5 km/h except for a 20.0 min rest stop. If the person's average speed is 71.2 km/h, how much time is spent on the trip and how far does the person travel?
*May 14, 2013*

**language**

1.c 2.b
*May 12, 2013*

**math**

Points A and B are on the top and bottom edges of a cylindrical roll of paper of height 8 and circumference 12. A and B are diagonally opposite each other. The paper is cut along line C and opened out. How far apart are A and B on the flat surface?
*May 11, 2013*

**Math algebra**

Let N be the sum of all positive integers q of the form q=p^k with prime p, such that for at least four different integer values of x from 1 to q, x^3−3x≡123(modq). What are the last 3 digits of N?
*May 11, 2013*

**Math**

There is an expression some people use that says, “What you put into it is what you get out of it.” People might use this expression to describe your skills at a sport or activity and how that relates to the amount of time and effort you spend practicing that ...
*May 10, 2013*

**English II**

"Base Details" If I were fierce, and bald, and short of breath, I’d live with scarlet Majors at the Base, And speed glum heroes up the line to death. You’d see me with my puffy petulant face, Guzzling and gulping in the best hotel, Reading the Roll of ...
*May 9, 2013*

**Life science**

How does the sun allow you to Run the mile
*May 8, 2013*

**Math**

An elevator named L in "63 Building" in Seoul is notorious for its low speed. It takes 3 seconds for L just to move one floor. It takes another 20 seconds for it to have its door open and close automatically. What is even more frustrating, is that the elevator ...
*May 7, 2013*

**Math**

A woman rides her bicycle from her house to and from a lake. It takes her 1 1/2 hours to ride to the lake and 1 3/4 hours to ride back. She rides downhill at 12 kilometers per hour, on level ground at 8 kilometers per hour, and uphill at 6 kilometers per hour. What is the ...
*May 7, 2013*

**Math**

Two cars run at constant speeds around a one-mile racetrack. The faster car passes the slower car every two minutes if the cars run in the same direction. If they run in opposite directions, they meet every 15 seconds. Find the speed of the faster car in miles per hour.
*May 7, 2013*

**English II**

"Base Details" If I were fierce, and bald, and short of breath, I’d live with scarlet Majors at the Base, And speed glum heroes up the line to death. You’d see me with my puffy petulant face, Guzzling and gulping in the best hotel, Reading the Roll of ...
*May 7, 2013*

**Math (Probability)**

Four players are playing a game involving choosing squares on a grid of size 3×8. Each player chooses a random square on the grid, then all players reveal their choices and a token is placed in the center of each of these squares. The probability that the tokens form the...
*May 6, 2013*

**5th grade math**

It is 3,556.
*May 6, 2013*

**Math (Algebra)**

What is the remainder when 5×55×555×…×555,555,555 is divided by 100?
*May 6, 2013*

**Math**

A candy store currently sells almonds for $8.50 per kilogram and peanuts for $4.50 per kilogram. It wants to create 20 kilograms of mixed nuts that will equivalently sell for $5.30 per kilogram. How many kilograms of almonds should they use?
*May 6, 2013*

**Math (Algebra)**

If the sum of 3 non-zero distinct real numbers a, b, and c is 2, and the two sets {a,b,c} and {1/a,1/b,1/c} are the same, what is the value of a^2+b^2+c^2? Note: Two sets are the same if there is a one-to-one correspondence between their elements. For example, the sets {1,2,3...
*May 6, 2013*

**Math (Algebra)**

The ratio of men to women in the applicants for Lamborghini this year is 4:3, while the ratio of men to women in the successful applicants is 5:3, and the ratio of men to women in the rejected pile is 1:1. If the number of successful applicants is 176, what is the number of ...
*May 5, 2013*

**Math (Algebra)**

The sum of beads owned by John, Bob, and Dale is 273. The ratio of John's beads and Dale's is 8:5, and Dale's beads are 10/13 times Bob's. How many more beads does John own than Dale?
*May 5, 2013*

**Phy. Sci.**

What are the forces on two charges of +0.43 C and +1.4 C, respectively, if they are separated by a distance of 3.7 m?
*May 3, 2013*

**Math (Trigonometry)**

Given that sin 53∘ = T, how many values of N, subject to 0 ≤ N ≤ 1000 are there, such that sin N∘ = T?
*May 3, 2013*

**Math (Algebra)**

How many distinct rational numbers can be expressed in the form a/b, where a and b are integers such that 1 ≤ a < b ≤10?
*May 3, 2013*

**Financial Accounting**

80880.49
*May 3, 2013*

**algebra1**

mr jones estimates his profit starting in 2006 will be given by the formula p=7t^2-14t+10 where t is number of years and p is the profit.if this formula is correct,when will mr.jones have a profit of more than $1000. please help
*May 2, 2013*

**English II**

"Base Details" If I were fierce, and bald, and short of breath, I’d live with scarlet Majors at the Base, And speed glum heroes up the line to death. You’d see me with my puffy petulant face, Guzzling and gulping in the best hotel, Reading the Roll of ...
*May 1, 2013*

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