Friday

July 31, 2015

July 31, 2015

Total # Posts: 2,645

**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*

**math**

poop
*May 23, 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*

**math**

574836
*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*

**English II**

On a proud round cloud in a white high night. A. alliteration B. consonance C. assonance D. limerick
*May 1, 2013*

**physics**

A downhill skier is on top of a hill at a height of 30.00 meters. How fast will he be moving when he is at level portion at the bottom of the hill?
*May 1, 2013*

**math**

3/10
*April 30, 2013*

**Number Theory**

16 :)
*April 29, 2013*

**Math (Combinatorics)**

Thanks ravi and ashu :)
*April 29, 2013*

**Math (Combinatorics)**

In the plane, the points with integer coordinates are called lattice points. Suppose a flea in the plane jumps from one lattice point to another. Each jump is one unit to the right, one unit to the left, one unit up, or one unit down. If the flea starts at the origin and makes...
*April 29, 2013*

**Math (Combinatorics)**

How many 4 digit positive integers have the ones digit a multiple of 1, the tens digit a multiple of 2, the hundreds digit a multiple of 3 and the thousands digit a multiple of 4?
*April 29, 2013*

**Math (Geometry-Vectors)**

Let θ be the angle between two vectors v and u . If v*u =12, |v|=2, |u|=6√2 and 0∘<θ<180∘, what is the value of θ (in degrees)?
*April 29, 2013*

**Math (Geometry)**

Square ABCD has M as the midpoint of AB, N as the midpoint of BC, P as the midpoint of CD and Q as the midpoint of MP. If [AMNPDQ]=20, what is the value of [ABCD]? Details and assumptions [PQRS] refers to the area of figure PQRS.
*April 29, 2013*

**Math (Geometry)**

In right triangle ABC, we are given that ∠ABC=90∘ and AC=34. D is a point on line segment BC such that BD=12,DC=18. What is the length of AD?
*April 29, 2013*

**math**

So David, you mean, x + y = 11 x - y = 4 x = 7.5 y = 3.5 Then we need to substitute y into the original equation? x + 3.5 = 11 x = 7.5 x - 3.5 = 4 x = 7.5 Adding the values lead x = 15?
*April 29, 2013*

**Math (Quadratic Function)**

Suppose p(x)=ax^2+bx+c is a quadratic polynomial satisfying p(7)−p(3)=214. Determine the value of p(9)−p(1).
*April 28, 2013*

**English**

When two words in a poem are spelled similarly, but do not have the same sound, the type of rhyme is called_______________. A. eye B. end C. internal
*April 26, 2013*

**Math**

A polymomial p(x) = ax^2 + bx + c where a, b, c are some rational, has 1 + root 3 as one of the zeros and also p (2) = - 2, Find values of a, b and c. Please work the solution. Tried it many times but still can't get the answer/ The answer is a = 1, b = -2 and c = -2.
*April 26, 2013*

**Math**

A polymomial p(x) = ax^2 + bx + c where a, b, c are some rational, has 1 + root 3 as one of the zeros and also p (2) = - 2, Find values of a, b and c. Please work the solution. Tried it many times but still can't get the answer/ The answer is a = 1, b = -2 and c = -2.
*April 26, 2013*

**Math**

A polymomial p(x) = ax^2 + bx + c where a, b, c are some rational, has 1 + root 3 as one of the zeros and also p (2) = - 2, Find values of a, b and c. Please work the solution. Tried it many times but still can't get the answer/ The answer is a = 1, b = -2 and c = -2.
*April 26, 2013*

**Math**

A polymomial p(x) = ax^2 + bx + c where a, b, c are some rational, has 1 + root 3 as one of the zeros and also p (2) = - 2, Find values of a, b and c.
*April 25, 2013*

**Solve the following polynomial equati**

Solve the following polynomial equation for x : x^2 - 2( a+2)x + (a + 1)(a + 3).
*April 25, 2013*

**Math Please help ASAP**

Just follow the rule LCM(X, Y) * HCF (X,Y) = Product of two numbers (X,Y).
*April 25, 2013*

**ALGEBRA!!!!**

How many distinct integer values of N between 1 and 1000 are there, such that N=4a+b+4c and 2N=7a+6b+7c for some positive integers a, b and c?
*April 25, 2013*

**Science....Need Help!!!**

Greenhouse gases
*April 24, 2013*

**statistics**

$10,126.65
*April 23, 2013*

**Physics**

If you've ever watched sailing, you will sometimes see a sailor hanging off the side of the boat, for example in this shot from the movie "The Thomas Crown Affair." Eventually, of course, the sailboat tips over so far that a person cannot keep it balanced. ...
*April 22, 2013*

**Physics**

Climbing to the top of Mount Everest is hard. But, it's slightly easier than you might think as people weigh less as they climb to the top. Let WE be a person's weight on top of Mount Everest and WS be their weight at sea level. What is the value of 1−WE/WS? ...
*April 22, 2013*

**Math (Percent discount)**

With the holiday approaching, Nancy's Closet is having a sale, where all their clothes are 40% off. Mary, who works there, can get a further staff discount of 30% off the sale price. What is the total percent discount that Mary gets?
*April 22, 2013*

**algebra 2**

During the first part of a trip a canoeist travels 26 miles at a certain speed. The canoeist travels 8 miles on the second part of the trip at a speed 5 mph slower. Total time is 3 hours. What was the seed on each part of the trip
*April 21, 2013*

**Physics**

voltage
*April 18, 2013*

**physics**

hi answer is pi
*April 17, 2013*

**Calculus**

actually theres an integral sign. at the top of the sign theres a 3. At the bottom of it, theres a 2.
*April 16, 2013*

**Calculus**

∫3 at top and 2 at bottom x/x^2+1 dx = ? if you could show steps that would be great thanks
*April 16, 2013*