Friday

February 24, 2017
Total # Posts: 468

**chemistry**

Calculate the solubility of Cacl2 in g/L based on the experiement. Given 650g of CaCl2 added to 1.0L and allowed to dissolve as much as possible. While the remaining solid CaCl2 is filtered out of the solution and found to have a mass of 5.509g. What is the solublity of CaCl2

*June 6, 2012*

**trig**

y=92.5 x=157.9 x+y=250.4ft

*June 5, 2012*

**ALG 2 (exponents)**

Write log'2' 8 = 3 in exponential form?

*May 12, 2012*

**Algebra 2**

How would I find the sum of the geometric series given? 1/5 - 1/25 + 1/125

*May 12, 2012*

**Math**

You need to line the inside of a tank that is 6 ft. diameter and 40 ft. high. You are going to line only the sides with the lining. How many sq. ft. are needed?

*May 4, 2012*

**Chemistry**

How much heat is either ______(absorbed or given off) when 91.45g of HI decomposes to H2 and I2 at 25 degrees C? What goes in the blank and how much heat? Thanks!

*April 29, 2012*

**Algebra 2 (Geometric Series)**

Write (2x+3y)^3 in expanded form I need a little help as far as how I would begin working this problem out.

*April 26, 2012*

**Algebra 2**

Find the inverse of the following function: f(x) = 3x + 12 I don't think I worked this problem off correctly...I am suppose to find the inverse of the function Is this the correct way to work this problem? y= 3x + 12 x= 3y + 12 3y = x - 12 f-1(x) = x - 12/3

*April 18, 2012*

**Algebra 2 (Quadratic Equations)**

Is the point (-3, -2) a solution of the intersection of the following set of quadratic equations: Y < -X^2 X^2 + Y^2 < 16 I'm not sure how to actually work this problem out. Can anyone help me with this problem please.

*April 18, 2012*

**Geometric Series (Algebra 2)**

Thank you Damon, that helped alot...

*April 14, 2012*

**Geometric Series (Algebra 2)**

I need some assistance or a formula when trying to find the first term of geometric series please! I don't understand this!!!! What is the first term of a geometric series with a summation of 289, 5 terms and a common ratio of 1/2?

*April 14, 2012*

**Algebra 2**

Thank you, I think I understand how to work it out now! That helped me out so much!

*April 12, 2012*

**Algebra 2**

What is the first term of a geometric series with a summation of 800, 4 terms and a common ratio of 3?

*April 12, 2012*

**Algebra 2**

What is the first term of a geometric series with a summation of 800, 4 terms and a common ratio of 3?

*April 11, 2012*

**government**

idk what this stuff is im doing it on germany

*April 11, 2012*

**government**

Using the Internet, encyclopedia, and/other reference material for research, write a 1,000-word report on feudalism in the history in one of the following countries: •France •England •Germany Include the approximate years when feudalism began and ended in that ...

*April 11, 2012*

**physics**

A pair of eyeglass frames are made of an epoxy plastic (coefficient of linear expansion = 1.30 10-4°C−1). At room temperature (20.0°C), the frames have circular lens holes 2.27 cm in radius. To what temperature must the frames be heated if lenses 2.28 cm in ...

*April 11, 2012*

**physics**

A hypodermic syringe contains a medicine with the density of water (figure below). The barrel of the syringe has a cross-sectional area of 2.44 10-5 m2. In the absence of a force on the plunger, the pressure everywhere is 1.00 atm. A force vector F of magnitude 1.91 N is ...

*March 28, 2012*

**physics**

For safety in climbing, a mountaineer uses a nylon rope that is 65 m long and 1.1 cm in diameter. When supporting a 94-kg climber, the rope elongates 1.4 m. Find its Young's modulus.

*March 28, 2012*

**physical aspects of nature**

A 1,440-N crate is being pushed across a level floor at a constant speed by a force of 250 N at an angle of 20.0° below the horizontal; (a) What is the coefficient of kinetic friction between the crate and the floor? (b) If the 250-N force is instead pulling the block at ...

*March 15, 2012*

**Math**

A swimming pool is 40 feet long, 20 feet wide, 8 feet deep at the deep end, and 3 feet deep at the shallow end; the bottom is rectangular. If the pool is filled by pumping water into it at the rate of 40 cubic feet per minute, how fast is the water level rising when it is 3 ...

*March 2, 2012*

**perimeter problems math**

36

*February 21, 2012*

**Economics**

Wilpen Company, a price- setting firm, produces nearly 80 percent of all tennis balls purchased in the United States. Wilpen estimates the U. S. demand for its tennis balls by using the following linear specification: where Q is the number of cans of tennis balls sold ...

*February 19, 2012*

**chemistry**

KI+H2SO4+KIO3 Write the balanced net ionic equation.

*February 18, 2012*

**Algebra 2**

How did you come up with that answer, I would like to learn how to work it out.

*January 17, 2012*

**Physics (verification)2**

I would love for someone to please verify my solution for this problem: A former amusement park attraction consisted of a huge vertical cylinder rotating rapidly around its axis. The rotation speed should be sufficient for the people found inside to be stuck to the wall when ...

*December 10, 2011*

**Physics (verification)**

I would love for someone to please verify my solution for this problem: A former amusement park attraction consisted of a huge vertical cylinder rotating rapidly around its axis. The rotation speed should be sufficient for the people found inside to be stuck to the wall when ...

*December 9, 2011*

**physics**

my bad, drwls is right, didn't take for account that it's around the rink, so there's the centripetal acceleration to take for account

*December 9, 2011*

**physics**

no, because he is at a constant speed, whenever you have a constant speed there is no acceleration

*December 9, 2011*

**physics**

A former amusement park attraction consisted of a huge vertical cylinder rotating rapidly around its axis. The rotation speed should be sufficient for the people found inside to be stuck to the wall when the floor was removed. what should be the minimum speed of rotation for ...

*December 9, 2011*

**media and american culture**

Do you think the Internet has created more harm than good to artists in the music industry? Explain your answer.

*December 1, 2011*

**media and american culture**

Do you think the Internet has created more harm than good to artists in the music industry? Explain your answer.

*December 1, 2011*

**Math**

Which lines are parallel? y=-3x+1 -3x+y=5 2y=-6x+12

*November 14, 2011*

**Chemistry**

@DrBob22 I think you would be of more help if you actually answered the question instead of just giving the equation in all your posts.

*November 2, 2011*

**Phyics**

bruh................

*October 19, 2011*

**physics**

A crate of weight Fg is pushed by a force on a horizontal floor. (a) If the coefficient of static friction is μs, and is directed at angle θ below the horizontal, show that the minimum value of P that will move the crate is given by the following equation. (Do this ...

*October 17, 2011*

**English**

I have retyped the paragraph with a few corrections that I felt were necessary. Along with the tension that goes on between Mr. and Mrs. Bennet, Charlotte and Mr. Collins' marriage is not all happy giddy. Charlotte is considerably old for a single woman at the time and ...

*October 13, 2011*

**geometry**

The moon is the largest satelite if and only if its for the earth.

*September 21, 2011*

**algebra**

where do the brackets go 2 x 3 to the 3rd power + 4 to = 4374

*September 5, 2011*

**math**

it just says domain R. I guess all real numbers?

*September 1, 2011*

**math**

find all values of c such that f(x) = (x+1)/(x^2+2cx+4) has domain R

*September 1, 2011*

**Quantitative Methods in Business**

I'm having trouble with this word problem: Priority Mail is the U.S. Postal Service's alternative to commercial express mail companies such as FedEx. An article in The Wall Street Journal presented some interesting conclusions comparing Priority Mail shipments with the...

*August 30, 2011*

**math**

There are 3 different colors, so regardless of how many there are of each one, even if worst case scenario, you take out a blue sock first, then a red one and then a white one, the next color has to be one of them, so you would have a pair, so the answer is 4

*August 29, 2011*

**Math**

I can't unscramble this. GONUENRIC It's dealing with geometry, mainly the stuff with Dilation, Rotation, stuff like that.

*August 16, 2011*

**math**

in the quadratic formula ax©÷+bx+c, what does the "a" stand for in ax©÷?

*August 11, 2011*

**4th grade math**

44th

*July 25, 2011*

**Algebra**

During the first part of a trip, a canoeist travels 98 miles at a certain speed. The canoeist travels 10 miles on the second part of the trip at a speed 5 mph slower. The total time for the trip is 3 hours. What was the speed on the FIRST part of the trip? What was the speed ...

*July 24, 2011*

**Algebra**

Aki’s Bicycle has determined that when x hundred bicycles are built, the average cost per bicycle is given by C(x)=-0.2x^2-0.1x+9.743, where C(x) is in hundreds of dollars. How many bicycles should the shop build to minimize the average cost per bicycle? They should build...

*July 23, 2011*

**mathm**

how do you find the absolute maximum of 2x^3+3x^2-12x-7 on interval (-3,0)

*June 28, 2011*

**Physics**

A ball initially moving at 0.5m/s rolls down a straight slope, accelerating at 0.25m/s^2 for 4 sec, how far does the ball travel in this time?

*June 16, 2011*

**british lit**

what does the Redcrosse Knight represent in The Faerie Queene?

*June 15, 2011*

**Math - Properties of Logarithm**

Thanks... got it...

*June 9, 2011*

**Math - Properties of Logarithm**

Can someone show how to this question. Loga(x+3) + Loga(x-3) = 3 I don't know if I'm typing this correctly the a is the base. So, I'm thinking, Loga((x+3)(x-3)) = 3 (x+3)(x-3) = 3^a x^2 - 9 = 3^a, x^2 = 3^a + 9 x = sqrt(3^a + 9) but now I'm stuck, I don't ...

*June 9, 2011*

**Math**

Solve the system of equations by graphing. Then classify the system.x+y=8x-y=-2

*May 20, 2011*

**english**

how do I correctly punctuate ? "Who wants dessert?," Latisha asked us as she walked into the room with a beautiful steaming apple pie. or is it correct?

*May 10, 2011*

**Math**

A man has 2 pennies, 3 nickels, 1 dime and 2 quarters. How many different sums of money can he make using one or more of these 8 coins?

*May 5, 2011*

**Math**

Circle C has radius 4 inches. Circle D had radius 9 inches. These two circles are connected. Point A,B,and E are points of tangency. Find AB. From point C to point D(which is the radius of circle C plus the raduis of circle D) it is 13 inches. From point C to point A (radius ...

*April 29, 2011*

**Math**

I don't understand someone help me!!

*April 11, 2011*

**chemistry**

Does a precipitate form if HCl and Ba(NO3)2 are mixed?

*April 3, 2011*

**english**

Every now and then, instead of using e-mail, mail a letter to your grandparents. We live in a fast-paced world. We feel comfortable using computers to send e-mails and Instant Message. Nana doesn’t live in that time zone. Forget all those fancy fonts and emoticons or ...

*March 27, 2011*

**chemistry**

A 375 g sample of well water is found to contain 17.0 mg of lead. How much lead (in parts per million) is in the well water? Round to the nearest tenth. Don't forget the unit.

*March 4, 2011*

**bca**

____ is the code of acceptable behaviors users should follow while on the Internet; that is, it is the conduct expected of individuals while online.

*March 1, 2011*

**9th grade math**

the triange is 31cm, side 1 and side 2 have equal lenghts, while side 3 is one centimeter shorter than twice then length of side 1, how long is each side?

*February 18, 2011*

**Physics**

I just need an equation to get me started, the book does not list one that is useful. The example they give uses the equation V1 = Ke(q1/r1) the problem is I don't know q.

*February 18, 2011*

**Physics**

A proton is located at the origin, and a second proton is located on the x-axis at x = 5.58 fm (1 fm = 10-15 m). (a) Calculate the electric potential energy associated with this configuration. 1 (b) An alpha particle (charge = 2e, mass = 6.64 10-27 kg) is now placed at (x, y...

*February 18, 2011*

**Physics**

never mind wrong question for the previous response. Thanks.

*February 18, 2011*

**Physics**

In the equations listed they are refering to a point charge which is different then that of 1.6*10^-19. If I were to use that in the equation it would not work. The point charge in the example is 5.00*10^-6 C

*February 18, 2011*

**Physics**

In the book the examples they give have a charge to them, but they don't offer any help with this question because the don't list a charge of the electron

*February 18, 2011*

**Physics**

An electron is at the origin. (a) Calculate the electric potential VA at point A, x = 0.410 cm. (b) Calculate the electric potential VB at point B, x = 0.820 cm. What is the potential difference VB - VA?

*February 18, 2011*

**Physics**

Awesome! Thanks it worked out, I had the mass of an electron wrong. That was my problem there.

*February 18, 2011*

**Physics**

A uniform electric field of magnitude 410 N/C pointing in the positive x-direction acts on an electron, which is initially at rest. The electron has moved 3.00 cm. (a) What is the work done by the field on the electron?(b) What is the change in potential energy associated with...

*February 18, 2011*

**Math- Please Help!!**

739 kilometers per hour. I used an online electronic flight computer.

*February 18, 2011*

**trig**

At 2 points 95 ft apart on a horizontal line perpendicular to the front of a building, the angles of elevation of the top of the building are 25 degrees and 16 degrees. How tall is the building?

*February 14, 2011*

**math**

a rectangular parking lot has a length that is 10 yards greater than the width. the area of the parking lot is 200 square yards.find the length and the width

*February 5, 2011*

**Mathematics**

no;11 1/8 needs to be reduced

*January 12, 2011*

**math**

if you have a bill of 1.354 pesos ( philippines money) how can you it equal to a three family. example .Daniel 2 children Rolando 4 children Dante 5 children. how much will he pay per head of the family in order to equal a bill of each children to a bill of 1.354?

*January 1, 2011*

**Math**

I think we must add the whole family per head and divided the given bill.then times the number of every per head of the family in order to get a specific equal payment per head of the family. example: (1.439 peso bill philippine money) 1.439 given number.plus 2+3+5=10 per ...

*December 28, 2010*

**Math**

f you have a bill of 1.439 pesos how can you equal each person in 3 family in per head? example.family of Joseph-3 family of Daniel-2 family of charles-5?

*December 28, 2010*

**math**

how to convert litres to force in newton?

*December 18, 2010*

**education**

sorry. it didn't copy like the chart. i needed help on the last column which was determination of the evaluation.

*December 3, 2010*

**education**

Professional Growth Statement: __________________________________________________________________________________________ ____________________________________________________________________________________________________________________. Timeline: This plan should address ...

*December 3, 2010*

**Physics: Simple Harmonic Motion**

A 10kg particle undergoes simple harmonic motion with an amplitude of 2.0mm, a maximum acceleration of 8.0x10^3 m/s^2, and an unknown phase constant (phi) What are: a.) the period of the motion b.) the maximum speed of the particle c.) total mechanical energy of the oscillator...

*December 1, 2010*

**Biology**

This question refers to the replication cycle of viruses. Can anyone invent a drug that would reduce the severity of a viral infection, where one might block the cycle.

*December 1, 2010*

**Physics**

A 10kg particle undergoes simple harmonic motion with an amplitude of 2.0mm, a maximum acceleration of 8.0x10^3 m/s^2, and an unknown phase constant (phi) What are: a.) the period of the motion b.) the maximum speed of the particle c.) total mechanical energy of the oscillator...

*November 30, 2010*

**Physics**

A 10kg particle undergoes simple harmonic motion with an amplitude of 2.0mm, a maximum acceleration of 8.0x10^3 m/s^2, and an unknown phase constant (phi) What are: a.) the period of the motion b.) the maximum speed of the particle c.) total mechanical energy of the oscillator...

*November 30, 2010*

**Logic**

Supply steps in a proof of a valid argument and give reasons using rules of inference. 1.)~A*B 2.)C>A 3.)CvD/D

*November 29, 2010*

**Algebra**

but if you move things around it could equal something else... like 3 = 2x^3 + x how do you solve from there?

*November 18, 2010*

**Algebra**

how? can you show me please?

*November 18, 2010*

**Algebra**

0 = 2x^3 + x - 3 solve for x

*November 18, 2010*

**AP Physics**

A pole-vaulter approaches the takeoff point at a speed of 9.50 m/s. Assuming that only this speed determines the height to which he can rise, find the maximum height at which the vaulter can clear the bar.

*November 13, 2010*

**1st grade**

This past summer, Amanda went to the amusement park

*November 8, 2010*

**geometry**

de is equal to 17

*November 6, 2010*

**TEACHING**

HOW DO DUE PROCESS RIGHTS DIFFER FOR PROBATIONARY AND TENURED TEACHERS

*November 4, 2010*

**Chemistry**

it stands for Mu/meter

*October 29, 2010*

**Chemistry**

A heat lamp produces 22.5 watts of power at a wavelength of 6.0 {\rm \mu m}. How many photons are emitted per second? 1{watt}} = 1 J/s i got 7.02*10^20 but that is incorrect, can you help?

*October 29, 2010*

**college Chemistry**

Hydrobromic acid is a strong acid. If you have 1 L of a 7.5 M solution of Hydrbromic acid? A) What is the concentration of H_3O^+? B) What is the PH of this solution? C) If you dilute 1 liter of 7.5M in HBR solution to a volume of 2 L what is the new concentration?

*October 21, 2010*

**11th grade**

Use the following functions to solve. f(x) = x2 + x + 1; g(x) = 5 - 2x; h(x) = -x2 Solve f(g(-1))

*October 20, 2010*

**algebra II**

Use the following functions to solve. f(x) = x2 + x + 1; g(x) = 5 - 2x; h(x) = -x2 Solve f(g(-1))

*October 19, 2010*

**math**

could someone show me how to write this or set up this equation?2 ships sail from the same port, one sails dew east at 15 mph and the second sailed dew south at 20 mph, how far apart are the ships after 3 hours?

*October 19, 2010*

**math**

2 ships sail from the same por, one sails dew east at 15 mph and the second sailed dew south at 20 mph, how far apart are the ships after 3 hours? could you show the how you set this problem up?

*October 19, 2010*