Thursday

May 5, 2016
Total # Posts: 1,240

**Physics**

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 1, 2013*

**Math-algebra-Steve**

The sequence {an} satisfies a0=1,a1=213, and an=2an−1+an−2 for all n≥2. Let S=∑i=1 to infinity a[i-1]/(a[i]^2-a[i-1]^2) What is the value of 1/S?
*June 24, 2013*

**Physics**

0.700
*June 24, 2013*

**Math**

The sequence {an} satisfies a0=1,a1=213, and an=2an−1+an−2 for all n≥2. Let S=∑i=1 to infinity a[i-1]/(a[i]^2-a[i-1]^2) What is the value of 1/S
*June 24, 2013*

**Physics**

A small coin is inside a bowl. The bowl is a surface of revolution of the curve y=100x^4 m^-3. This coin slides around the inside of the bowl at a constant height of y=0.01 m above the bottom of the bowl. What is its angular velocity in rad/s? Accel due to gravity = 9.8 m/s^2
*June 24, 2013*

**Calculus 2**

(x^3+2x^2-15x+1)/(x^2+2x-15) from 0 to 7
*June 23, 2013*

**chemistry**

1.what are amber light from traffic signal? 2. what are cosmic rays from outer space?
*June 8, 2013*

**history**

Lord Selkirk 1804 during his tracels in British North America
*May 22, 2013*

**history**

Lord Selkirk implied that the French 1)were happy under English rule 2)never accepted English rule 3)should accept English rule 4)should change their language and institutions 5)were not oppressed by the English i put 4
*May 22, 2013*

**history**

William Lyon Mackenzie 1837 in a published handbill
*May 22, 2013*

**history**

it can be inferred that William Lyon Mackenzie 1)was a famous writer 2)was a member of the Family Compact 3)oppose the oligarchies 4)supported the British 5)believed in peaceful assembly I put 1
*May 22, 2013*

**Precalc Math**

Suppose you want to end up with $5,000 in a bank account after 4 years earning a rate of 3.5% compounding monthly. How much would you have to initially invest? Round to the nearest dollar. Thanks a lot in advance!! :)
*May 20, 2013*

**math**

4x^2+24x+128y-988=0 in standard form
*May 20, 2013*

**Chemistry**

Oxygen gas and hydrogen gas are used to synthesize dihydrogen monoxide. A lab group utilizes 1.00 liters of oxygen and 1.01 liters of hydrogen to create 0.75 grams of product. How many milliliters of product should the group have expected to get? What will the [H+] ...
*May 20, 2013*

**enlish literture**

narnia the lion the the witch and the wabode two literary devives were used in chapter 10 repetition and smiple identify the line that features these device
*May 14, 2013*

**spanish 1**

gaston subio a los autitos chocadores pero primero teníamos almuerzo y caminó allí
*May 14, 2013*

**physics**

A helium balloon has a mass of 0.022 kg, which includes both the helium and the balloon itself. On this balloon, there is 0.290 N of buoyant force pushing the balloon upward. If I let go of the balloon, find the balloon's acceleration rate in the upward direction. If we ...
*May 12, 2013*

**physics**

Honors Physics
*May 5, 2013*

**geometry**

M is the midpoint of JK, Q is the midpoint of MK, and X is the midpoint of MQ. if a point on JK is picked at random, what is the probability that the point is on MX?
*May 1, 2013*

**Biology**

You have stated that you have love for this like of thing, high school Biology isn't that when you try it out, just have to do the following. Study, study, study and the rest you'll really enjoy
*April 29, 2013*

**Statistics**

The yearly returns of a stock are normally distributed with a mean of 5.1% and standard deviation of 2.7%. Find the probability of a yearly return being greater than 6%.
*April 24, 2013*

**math**

What is the surface area of a circle that has a diameter of 14 inches?
*April 20, 2013*

**Biology**

even in multicell organisms (ex: animals) events which occur in individual cell may have profound effects on their entire organism.
*April 18, 2013*

**Chemisty**

Before solving the problem write a balanced chemical equation Excess aqueous NaI was added to 50 mL of aqueous CuNO3 solution, and 14.2 g of CuI precipitate was formed. What was the molar concentration of CuNO3 in the original solution? Answer in units of M
*April 12, 2013*

**physics**

If your browser can't load certain text, the box after angle is theta, and the coefficient of static friction is u sub s
*April 11, 2013*

**physics**

Your written homework will be graded entirely on the clarity and completeness of your derivation. No credit will be awarded for a final answer without a derivation. As usual, simplify your final answers as much as possible. A giant Pez dispenser of mass m rests on a ladder of ...
*April 11, 2013*

**Geometry**

2x^2-9x-5=0 Is it possible to combine 2x squared with 9x? Not sure how to tackle solving this one.
*April 10, 2013*

**art**

From Wiki Answers: If you are a fan of someone famous, you may want to do what they want to do. Testimonial propaganda is a type of propaganda that is used when someone famous says something good about a certain issue, product, etc. I have not heard of icon ads.
*April 10, 2013*

**Physics**

Particles 1 and 2 have charge 20uC each and are held at separation distance d=1.50m. (a)What is the magnitude of the electrostatic force on particle 1 due to particle 2? Particle 3 of charge 20uC is positioned so as to complete an equilateral triangle. (b) What is the ...
*April 10, 2013*

**Math**

A recipe for fruit punch calls for 2 1/2 c of orange juice, 1 1/3 c of pineapple juice, and 1 3/4 c of soda water. If June makes 4 times the recipe, how many cups of fruit punch will she have?
*April 9, 2013*

**Chemistry**

7. A solution is prepared by dissolving 8.5 g NaHCO3 and 12.7 g Na2CO3 in 500.0 mL of water. Calculate the pH.
*March 20, 2013*

**Chemistry**

7. A solution is prepared by dissolving 8.5 g NaHCO3 and 12.7 g Na2CO3 in 500.0 mL of water. Calculate the pH.
*March 20, 2013*

**Chemistry**

Calculate the pH of a buffer solution containing 1.0 M ammonia (NH3 ; Kb = 1.8 x 10-5) and 1.0 M ammonium chloride (NH4Cl).
*March 20, 2013*

**Chem**

What is the maximum Cu2+ concentration possible in a solution that has a 7.4 E -5 M sulfide ion concentration without precipating CuS? For CuS, Ksp= 6.0 E -36
*March 17, 2013*

**Statistics**

A coin is tossed 10 times. What is the probability that the third head will apear on the tenth toss?
*March 14, 2013*

**algebra**

From a point on a straight road, John and Fred ride bicycles in opposite directions. John rides 10 miles per hour and Fred rides 12 miles per hour. In how many hours will they be 55 miles apart?
*March 13, 2013*

**Science**

What happens to make ice change into liquid and why does liquid water become a gas?
*March 13, 2013*

**math**

answer the plomlem!
*March 11, 2013*

**Physics**

how far from the center of the earth would a person with a weight of 469N on earth have to be to have a weight off 55.4N?
*March 11, 2013*

**accounting**

Acme Corporation issued $650,000, 8%, bonds for $720,000. Was the market rate on the date of issue higher than, lower than, or equal to the stated rate of interest?
*March 5, 2013*

**accounting**

Acme Corporation issued $650,000, 8%, bonds for $720,000. Was the market rate on the date of issue higher than, lower than, or equal to the stated rate of interest?
*March 5, 2013*

**Geometry**

How do you find the apothem of a regular pentagon? Hexagon?
*February 28, 2013*

**Algabra 1**

Need help stuck on question. Find the range of f(x)=3g-5 for the domain (-1.5,2,4) A- (-8,10,-1,-1) B- (-9.5,1,7) C- (8,10,1,1) or D- (9.5,-1,-7)
*February 26, 2013*

**MATH- Algebra 2**

PRISM AND CYLINDER
*February 24, 2013*

**Pacific Union College**

Biphenyl, C12H10, is a nonvolatile, nonionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 17.5 g of biphenyl in 28.8 g of benzene?
*February 24, 2013*

**math**

what is the area enclosed by x=sin(y) and x=(2Sqrt2/pi)y ?
*February 20, 2013*

**Science**

I guess, will I be able to compare hoe people remember numbers better with their eyes or ears?
*February 20, 2013*

**Science**

How do I draw a graph comparing eyes & ears. If you remember numbers better with your eyes or ears?
*February 20, 2013*

**physics**

F average= delta p/delta t delta p =MV2-MV1
*February 19, 2013*

**physics**

Romeo takes a uniform 13.7-m ladder and leans it against the smooth (frictionless) wall of the Capulet residence. The ladder's mass is 23.2 kg and the bottom rests on the ground 3.43 m from the wall. When Romeo, whose mass is 70 kg, gets 88.3 percent of the way to the top...
*February 17, 2013*

**physics**

Romeo takes a uniform 13.7-m ladder and leans it against the smooth (frictionless) wall of the Capulet residence. The ladder's mass is 23.2 kg and the bottom rests on the ground 3.43 m from the wall. When Romeo, whose mass is 70 kg, gets 88.3 percent of the way to the top...
*February 15, 2013*

**C code**

//INSTRUCTIONS //Your parser will read from input.txt //input.txt consists of a series inputs that you need to read. //each input is proceeded by a flag. //Each flag will be either I,C, or F. //I means int C means char F means float. //So for example //I 7963467 //means int ...
*February 13, 2013*

**Math**

Find the minimum and maximum possible areas of a rectangle measuring 6 km by 11 km.
*February 12, 2013*

**Math**

Runner A crosses the starting line of a marathon and runs at an average pace of 5.6 miles per hour. Half an hour later, Runner B crosses the starting line and runs at an average rate of 6.4 miles per hour. If the length of the marathon is 26.2 miles, which runner will finish ...
*February 12, 2013*

**Math**

A truck traveling at an average rate of 45 miles per hour leaves a rest stop. Fifteen minutes later a car traveling at an average rate of 60 miles per hour leaves the same rest stop traveling the same route. How long will it take for the car to catch up with the truck?
*February 12, 2013*

**Alegebra**

If a kayaker's speed while traveling upstream is 7 miles per hour and downstream is 4 miles per hour. What is the kayaker's speed in still water? What is the speed of the current?
*February 6, 2013*

**C code**

Write a .c file named calc that: - Takes arguments from the command line - Solves a simple math problem - Returns the result as an exit status calc.c: //this is the function that gets called when the executable is run. int main(int argc, char * argv[]){ //I've given you ...
*February 6, 2013*

**English**

What point is Tan making with the example of her mother and the hospital in Mother Tongue by Amy Tan 1990?
*January 28, 2013*

**biology**

1. discuss the mechanisms that organisms undergo to accomplish morphogenesis 2. Describe the contributions of drosophila and nematodes in advancing understandings of development
*January 27, 2013*

**Physics**

a tuning fork of frequency 500 Hz is rotating on the edge of a disk of radius 1.2 meters. (a) If the disk turns at a rate of 40 rev/min, what are the maximum and minimum frequencies heard by the listener? (b) To what positions of the tuning fork do these frequencies correspond?
*January 26, 2013*

**Physics**

Identical points on two harmonic waves with the same wavelength (.65 meters) and frequency are separated by a distance of .15 meters. What is the phase difference between the waves?
*January 26, 2013*

**Physics**

When speaker A is working the sound intensity at a particular location is 85 dB. When speaker B is working (without speaker A), it is 80 dB. What will it be if both speakers are working together?
*January 26, 2013*

**biology**

1. discuss the mechanisms that organisms undergo to accomplish morphogenesis 2. Describe the contributions of drosophila and nematodes in advancing understandings of development
*January 26, 2013*

**Math **

A certain car is about 100in. long and 60 in. wide. You plan to make a model of this car that is 9 in. wide. How long will your model be?
*January 22, 2013*

**Chem. **

What is the mass (in kilograms) of a cube of silver that measures 0.68m on each side, when the density of the sample is 10.5g/cm3
*January 20, 2013*

**Chem.**

What is the mass (in kilograms) of a cube of silver that measures 0.68 on each side, when the density of the sample is 10.5g/cm3
*January 20, 2013*

**Physics**

Three concentric rings and one point charge are in the same plane as shown in the above diagram. The linear charge densities of the rings are ë1 = 2.60nC/m, ë2 = -1.10nC/m, and ë3 = 2.20nC/m with corresponding radii of r1 = 86.0cm, r2 = 64.0cm, and r3 = 46.0cm. ...
*January 17, 2013*

**Physics**

A particle with mass m = 1.20g and charge q = 345ìC is traveling in the x-direction with an initial velocity of v0 = 68.0m/s. The particle passes through a constant electric field in the y-direction with magnitude |E| = 263N/C over a distance of d = 12.0m. (a) What is ...
*January 17, 2013*

**lang arts**

For the whole quick check the answers are B C C C
*January 17, 2013*

**Help please**

Paul Acorn maintains that the distinction between human and animal manipulation of the natural environment to create artifacts is: a. Technology b. the ethical application of technology c. Choice d. Creativity and adaptation
*January 16, 2013*

**Math**

What factors will give a product of 42? Show your work with repeated addition and with equal groups
*January 13, 2013*

**math**

3:45
*January 10, 2013*

**Biology**

Mumps
*January 7, 2013*

**help plzzzzz**

Ok
*January 2, 2013*

**help plzzzzz**

Are y'all trying to bring me down
*January 2, 2013*

**help plzzzzz**

Please and that's all I know I know how to spell I am just rushing Leasson- lesson Is that better for you
*January 2, 2013*

**help plzzzzz**

I know how to spell I am jus rushing
*January 2, 2013*

**help plzzzzz**

Yes i meant teacher dont interupt while the parent and child is interacting greet the parent appropriately explain what you want the parent to do cleary explain the leasson dats all i no
*January 2, 2013*

**help plzzzzz**

Discuss the responsibilities a parent has to volunteer parents when these parents are invited to participate in learning activities. Include five responsibilities in your discussion and give an example of each.
*January 2, 2013*

**HELP PLZ MATH**

A recent article in the Myrtle Beach Sun Times reported that the mean labor cost to repair a color television is $90 with a standard deviation of $22. Monte's TV Sales and Services completed repairs on two sets this morning. The labor cost for the first was $75 and it was...
*December 31, 2012*

**Physics**

A(n) 563 kg elevator starts from rest. It moves upward for 3.18 s with a constant acceleration until it reaches its cruising speed of 1.96 m/s. The acceleration of gravity is 9.8 m/s 2 . Find the average power delivered by the elevator motor during this period. Answer in units...
*December 20, 2012*

**Help Please!!Edu**

When attachment capacity develops normally, the child gets pleasure from interacting with other people. The degree of pleasure is related to the degree of attachment-pleasing a parent brings more pleasure than pleasing a stranger. It is this very property that helps parents ...
*December 16, 2012*

**Help Please!!Edu**

what does research show about the child's relationship with the primary parental figure when the child has additional attachments to other people?
*December 16, 2012*

**Factors**

What multiplication fact can be found by using the arrays for 2×9 and 5×9?
*December 12, 2012*

**Math**

a store has 8 boxes each of red and black pencils. 4 boxes of red pencils and 6 boxes of black pencils are sold. how many pencils are left?
*December 10, 2012*

**English**

What does the adage "Never declare your physician your heir" mean?
*December 9, 2012*

**algebra**

y - 2 = -2(x - 3)
*December 9, 2012*

**English **

For an essay for my honors English class, I am comparing the character of Roger Chillingworth to a knife. While I do have some ideas to write about, do you guys have any tips on ideas I could use? More importantly, to those who have read the book, what type of knife do you ...
*December 2, 2012*

**math**

Its actually 65!
*November 28, 2012*

**factors**

Is 25 a multiple of 5? How do u know?
*November 26, 2012*

**factors**

How do u know that 5 is a multiple of 25?
*November 26, 2012*

**Factors**

1•How can adding doubles help you to multiply by 2? Give an example. 2•If the ones digit of a number is greater than 1 is 0, what factor or factors must that number have? 3•How to u know that 5 is a multiple of 5?
*November 26, 2012*

**physics**

An engine with an output of 233.0 W has an efficiency of 36.0 %. It works at 8.00 cycles/s. How much heat is rejected each cycle? * I found that work done per cycle is 29.1 J. Im not sure what to do next
*November 18, 2012*

**Problem solving**

Look at the number 13,15,19,25 Describe the pattern.
*November 14, 2012*

**ss**

how did kites affect people, cultures and economies
*November 14, 2012*

**Math**

Identify the property or rule shown by each number sentence: 5 * (2*4) = (5*2) *4
*November 13, 2012*

**Calculus**

The critical number of the function f(x)=6xlnx is x=
*November 9, 2012*