Sunday

November 29, 2015
Total # Posts: 1,385

**ah trig help**

use an apropriate sum or difference indentity to prove the double-angle identity cos2u=1-2sin2u
*April 26, 2011*

**trig identies 5.3 &5.4**

i got it nevermind
*April 26, 2011*

**english**

an ode
*April 24, 2011*

**US History**

1. Which three amendments that were passed almost 100 years earlier, guaranteed that African-Americans had the right to vote? 2. Why was the Voting Rights Act of 1965 necessary? 3. Name three ways that local jurisdictions tried to inhibit African-Americans from voting prior ...
*April 24, 2011*

**Chemistry**

At which temperature will the following reactions reverse? Use the thermodynamic date provided at the end of the book. a) 2Ca(s) + O2(g) -> 2CaO(s) b) 2CH4(g) + 4 O2(g) -> 2CO2(g) + 4H2O(g)
*April 7, 2011*

**Chemistry**

The trick is that the heat lost from the metal is equal to the heat gained by the water. So q lost = f gained. Since the metal went from 100.0C to 32.5C I'd say it lost. The water went from 20.0C to 32.5C, so it gained. "q" then represents the metal and "f&...
*April 6, 2011*

**chemistry**

Is it possible to produce a form of sodium ferrate using these components? FeCl3 NaOH NaOCl
*April 5, 2011*

**English**

A critic should read a story more than once in order to write about it. True or False.
*April 5, 2011*

**Math**

Postal regulations specify that a package sent by priority mail may have a combined length and girth of no more than 129 in. Find the dimensions of a cylindrical package with the greatest volume that may be sent by priority mail. Hint: The length plus the girth is 2πr + l...
*April 4, 2011*

**5th Grade Math/Making a Duplicate**

a canoe is 5.67 how much is it in cm
*March 29, 2011*

**Chemistry**

At a particular temperature, K = 3.75 for the following reaction. SO2(g) + NO2(g) <==> SO3(g) + NO(g)\ If all four gases had initial concentrations of 0.550 M, calculate the equilibrium concentrations of the gases.
*March 27, 2011*

**math **

(x/4−1/x)/(1/2x+1/4)
*March 27, 2011*

**Physics**

A sled of mass 5.98 kg is coasting along on a frictionless ice-covered lake at a constant speed of 1.42 m/s. A 1.98-kg book is dropped vertically onto the sled. At what speed does the sled move once the book is on it?
*March 27, 2011*

**geometry**

How do I solve this? 4/3PI*R^3 When R=6 I get 288 if I do it in PI form. Just seems really high.
*March 21, 2011*

**Alegebra**

i have 5 questions, i dont know how to solve these questions. 7= 2 +5(z-2) 15(s-3)=12s-43 2a-6=3(a-4) 2(b-3)+5=3(b-1) 6x +7 / 5 = x
*March 11, 2011*

**Literature**

1. supernatural 2.imagination 3.everyday occurrences 4.emotional freedom 5.individual freedom 6.love of nature if you're in Brit Lit for the American School like i am... i found the answer in the definition of Romanticism in the back of the Study Guide
*March 10, 2011*

**Algebra**

A brick staircase has a total of 16 steps The bottom step requires 112 bricks. Each successive step requires 4 fewer bricks than the prior one. How many bricks are required to build the staircase?
*March 7, 2011*

**Geometry**

Find the perimeter of a square to the nearest tenth if the length of its diagonal is 16 millimeters
*March 6, 2011*

**Physics**

If you do work on an object in 1/3 the usual time, your power output is ____ times the usual power output
*March 2, 2011*

**Physics**

The work done on an object with a mass of 50 kg raised 3 meters is ________ Nm.
*March 2, 2011*

**Physics**

Two identical gliders slide toward each other on an airtrack. One moves at 1 m/s and the other at 2 m/s. They collide and stick. The combined mass moves at ____ m/s. Answer
*March 2, 2011*

**Physics**

A 2 kg ball rolls at 2 m/s toward a 1 kg ball at rest. After the balls collide they stick together and move at _____ m/s.
*March 2, 2011*

**Physics**

The kinetic energy of a 4 kg object moving at 3 m/s is _______ J.
*March 2, 2011*

**Physics**

The momentum of a 5 kg thrown 3 m/s is _________ kg m/s.
*March 2, 2011*

**Physics**

A 18 N object moves 1 m/s. Its KE is ______ J.
*March 2, 2011*

**Physics**

____ N of work are done on your physics text when you carry it horizontally across a 15 meter wide room.
*March 2, 2011*

**Alegbra sequences**

Year 2003 2004 2005 2006 Populatation 22.12 22.49 22.86 23.41 A. divide the population for each year by the population in the preceeding year. Round to the two decimal places and show the Texas population increase that is approximately geometric. 1.01 B. Write the general term...
*March 2, 2011*

**medical**

I. AMBULATORY CARE FACE SHEET Admit Date: 7/8/20XX @ 20:22 Discharge Date/Time: 7/9/20XX @ 10:10 Sex: M Age: 47 Disposition: Home Admitting Diagnosis: Possible esophageal foreign body. Discharge Diagnosis: Esophageal foreign body. Procedures: EGD with foreign body removal. ...
*February 28, 2011*

**Math**

10+10=20 5.29/20=0.2745 4+4=8 2.98/8=0.3725 The better deal is the one pack of 10 for $5.49 and get one free
*February 27, 2011*

**college algebra**

Find the maximum value of 5x + 7 – x2 on the horizontal span of 0 to 5. (Enter the maximum value of the expression, not the value of x at that point.)
*February 27, 2011*

**college algebra**

If an average-size man with a parachute jumps from an airplane, he will fall 12.5(0.2t - 1) + 19t feet in t seconds. How long will it take him to fall 134 feet?
*February 27, 2011*

**ALGEBRA 1**

Cindy will require $15,000 in 2 years to return to college to get an MBA degree. How much money should she ask her parents for now so that, if she invests it at 12% compounded continuously, she will have enough for school?
*February 27, 2011*

**algebra 1 sequences**

Year 2003 2004 2005 2006 Populatation 22.12 22.49 22.86 23.41 A. divide the population for each year by the population in the preceeding year. Round to the two decimal places and show the Texas population increase that is approximately geometric. 1.01 B. Write the general term...
*February 26, 2011*

**Algebra**

Jennifer takes a job with a starting salary of $39,000 for the first year with an annual increase of 5% beginning in the second year. What is Jennifer's salary, to the nearest dollar
*February 26, 2011*

**chemistry**

Describe how to make 20 mL of a 6.0 % solution from a stock solution with a concentration of 10 %.
*February 22, 2011*

**Algebra**

Find the accumulated value of an investment of $5000 at 5% compounded monthly for 8 years.
*February 22, 2011*

**algebra**

If p(t) is the profit (in dollars) that I expect my business to earn t years after opening, use functional notation to express my expected profit after 4 years and 6 months.
*February 19, 2011*

**Algerbra 2**

I am doing a worksheet for my alg. 2 class and in the worksheet it says: 'Simplify the expression. Assusme all variable are positive.' the problem is perentheses, square root of six times the power of 3 square root of six perentheses power of six!
*February 15, 2011*

**STATISTICS**

Private college and universities rely on money contributed by individuals and corporations for their operating expenses. Much of this money is put into a fund called an endowment, and the college spends only the interest earned by the fund. A recent survey of eight private ...
*February 15, 2011*

**american literature**

list three rhetorical devices that patrick Henry uses in his "speech in the virginia convention." Give an example from the speech of each rhetorical device.
*February 10, 2011*

**literature**

thanks for the help
*February 10, 2011*

**PHY**

Ok...I know this is a stupid question, but I need help! Ok, here it is: An object that has more electrons than it does protons will be _____ a CL^-1 ion. repelled by attracted to unaffected by I know that opposites attract and that same repells, but I am doubting myself with ...
*February 9, 2011*

**Physics**

I have been working on my Phys homework and came accross this question that is giving me some trouble: The charge (coul) on an object increases according to (q) = (2 coul)e[(0.050/sec)(t)], where t is in seconds. At how many seconds is the object deficient 1.56 x 10^20 ...
*February 5, 2011*

**Random Question**

Ok thank you.
*February 5, 2011*

**Random Question**

In the movie "Hauting Sarah" what is the twin sister trying to accomplish??? bringing her son back through her sister?
*February 5, 2011*

**Physics**

A certain "brand-new" (never-used) 9.0 volt cell contains 40mC of charge. The Electric energy "stored" in the cell amounts to about (___) joules. 0.0 0.06 37.5 .36 60x10^-4 I'm not too sure how to figure this problem out. I initially thought 40/9, but ...
*February 5, 2011*

**math**

Angelo is paid double time for each hour he works over 40 hours in a week. Last week he worked 46 hours and earned $520. What is his normal hourly rate?
*February 4, 2011*

**Calculus I**

evaluate and justify each step lim((xe^x)/tan x) as x approaches 1. i just need the over all jest of the problem because i don't know what to do to get rid of the 0 in the denominator. Thanks.
*January 31, 2011*

**physics**

a student does 314 J of work in moving a desk 2.1 m. What was the magnitude of the applied horizontal force?
*January 27, 2011*

**Science Half Lives**

I don't know the answer to your question, but can some one help me with mine? Question: After six half-lives, what percentage of a radioactive sample will remain? Please help me!, Thank you.
*January 25, 2011*

**CP Geometry**

Working with square roots (s.r.) and need help. - s.r. 60/5 This is negative s.r. 60/5
*January 25, 2011*

**CP Geometry**

it was a riddle. the answer was a jab well done.
*January 24, 2011*

**CP Geometry**

What do you call it when the nurse gives you a shot you hardly feel? s.r. = square root s.r.5 * s.r. 15. my choices are 5s.r.3, 20s.r.5, 4s.r.10, 3s.r.2, 3s.r.10, 2s.r.6, 9, 5s.r.6, 10s.r.3.
*January 24, 2011*

**Chemistry**

If the equilibirium reaction is 2 03(g) <--> 3 O2 9(g) is first order with respect to ozone, what type of plot( meaning what is plotted on the y axis vs what is plotted on the x-axis) will yield a straight line? what will the slope of the line represent? PLEASE help im ...
*January 23, 2011*

**Chemistry**

Sorry I typed it wrong i meant IF the rate of consumption of N2O4 (below) is .0221 what is the rate of production of NO2?
*January 23, 2011*

**Chemistry**

IF the rate of consumption of N2)4 (below) is .0221, what is the rate of production of NO2? N2O4(g)<->2NO2(g) Please help and explain. BC i have to actually understand how to do the problem. Thanks
*January 23, 2011*

**Comm215**

In this problem: Sally told Janice that she made the honor role. __ Pronoun shift in number __ Pronoun shift in person __ Ambiguous reference __ No error What does ambiguous reference mean?
*January 17, 2011*

**math**

If you borrow $5,000 at an APR of 5%. Find the interest, I after 36 months
*January 13, 2011*

**Math**

5% interest rate for 5,000,00 how much after 4 years
*January 13, 2011*

**physics**

A 10kg block is sliding at 10m/s along a frictionless track which suddenly curves straight up. how high will the block rise
*January 12, 2011*

**7th Grade Math-Exponents**

I dont understand this at all! Please help! Find the units digit for 7^197 without using a calculator. Explain how you found your answer.
*December 16, 2010*

**Math-7th grade**

that makes sense...thanks!
*December 16, 2010*

**Math-7th grade**

1.75 Thank you, But what about for day one? If it's 1.75 per day, how is the first day charge 3.75?
*December 16, 2010*

**Math-7th grade**

Im having trouble solving the amount per day... The table below shows the relationship between d, the number of days a DVD is returned late to a video rental store, and f, the amount of the late fee. Write an algebraic expression that describes this relationship? Prove your ...
*December 16, 2010*

**7th Grade Math**

I believe 21 2 doubled is 4 4 + 5 is 9 a quarter of 9 is 3 3+9 is 12 12 plus two is fourteen and half of fourteen is 7 7 plus 14 is 21.
*December 14, 2010*

**7th grade Math**

Thank you so much! I didnt understand it at all!
*December 14, 2010*

**7th grade Math**

A space probe is 7.62 x 10 to the 7th power kilometers from the surface of the planet Mars. If the space probe is traveling towards mars at a arate of 127 meters per second, how many hours will it take the probe to reach the surface of the plant? Round to the nearest hour. ...
*December 14, 2010*

**7th grade math**

Its a math homework assignment
*December 13, 2010*

**7th grade**

A space probe is 7.62 x 10 to the 7th power kilometers from the surface of the planet Mars. If the space probe is traveling towards mars at a arate of 127 meters per second, how many hours will it take the probe to reach the surface of the plant? Round to the nearest hour. Help!?
*December 13, 2010*

**Math**

jk sorry that was my sister she wont do it agin
*December 12, 2010*

**math**

the rectangle shown above has a total of 2808 square feet. the length is 78 feet. what is the width
*December 9, 2010*

**7th grade**

2(2.5b-9) + 6b= -7 5B -18 +6B= -7 Add the B's 11B -18=-7 +18 +18 11B= -11 Divide by 11 each side to get B=-1
*December 8, 2010*

**MATH**

Carmen deposits into an account that pays simple interest at a rate of per year. How much interest will she be paid in the first years?
*December 7, 2010*

**Math**

19+n u#1=19+1 u#1=20 u#50=19+50 u#1=69 50(20+69)/2
*December 5, 2010*

**physics**

when a force of 80n acts on a 500g hockie puck, at what rate will the hockie puck accelerate?
*December 3, 2010*

**physics help me please!**

A certain wave is incident on an interface at an angle of 40 deg. The wave emerges into the other material at an angle of 30 deg. Crossing the interface, the wave: a. increased speed b. reduced speed c. maintained constant d. more info is needed I think reduces its speed, but ...
*November 30, 2010*

**algebra**

I have this problem too! I can't figure it out either. lol
*November 28, 2010*

**Algebra**

find the unit rate for number of parts manufactured per hour if 1630 parts are made in 6 hours. round to the nearest integer. SHOW ALL WORK.
*November 28, 2010*

**Physics**

A plank 2.00 cm thick and 15.0 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. A man of mass 80.0 kg is forced to stand on the very end. IF the end of the board drops by 5.00cm because ...
*November 17, 2010*

**Physics**

A plank 2.00 cm thick and 15.0 cm wide is firmly attached to the railing of a ship by clamps so that the rest of the board extends 2.00 m horizontally over the sea below. A man of mass 80.0 kg is forced to stand on the very end. IF the end of the board drops by 5.00cm because ...
*November 17, 2010*

**Physics-Please Help Me!!**

5.Assuming the surface tension of water is .073 N/m, what is the force required to overcome the surface tension?
*November 15, 2010*

**physics**

5.Assuming the surface tension of water is .073 N/m, what is the force required to overcome the surface tension?
*November 15, 2010*

**Physics**

5.Assuming the surface tension of water is .073 N/m, what is the force required to overcome the surface tension?
*November 15, 2010*

**Physics**

A flat slab of styrofoam, with a density of 32 kg/m^3, floats on a lake. What is the minimum volume the slab must have so that a 42 kg boy can sit on the slab without it sinking?
*November 15, 2010*

**Chemistry**

Use the given data and calculate the enthalpy change for the following: a) B2O3(s)+3COCL2(g)--->2BCL3(g)+3CO2(g) b)Hg(l) +2Ag+(aq)--->Hg2+(aq)+2Ag(s) compound: B2O3(s) COCL2(g) BCL3(g) CO2(g) Ag+ (aq) Hg2+ (aq) Delta H (standard circle)f kj/mol -1272.8 -218.8 -403.8 -393...
*November 13, 2010*

**physics**

What approximate change in decibles does an observer experience form a sound source if the oberver moves to a new location that is 67% as far from the source?
*November 12, 2010*

**physics**

A series of waves traveling at 200 m/sec are being generated by a 100 Hz source. A point at the very top of the crest of a certain wave is ____ meters from a corresponding point 3 crests away.
*November 12, 2010*

**physics**

A 2000 lb box is being held at rest submerged in water. The box is displacing 2500 lbs of water. When the box is released from its submerged position, the box will a. sink b. rise to the surface and float c. remain where it is d. result unknown
*November 12, 2010*

**physics**

A wave that is travelling due west causes particles of the conducting material to ibrate "north/south". This wave is best described as: a. longitudinal b. transverse c. translute d. permute
*November 12, 2010*

**physics**

You should expect concrete to have an elastic constant that is _____ than wood. a. larger than b. smaller than c. equal to
*November 12, 2010*

**Chemistry**

Calculate the density of F2 gas at 27 degree Celsius and 1.00 atm pressure?
*November 9, 2010*

**Chemistry**

How many calories would be needed to convert 8.0g of ice at 0C to steam at 100C?
*November 9, 2010*

**pscyhology**

everything is right except 1)a 4)a 5)a 14)a 19)d just took test
*November 8, 2010*

**Chemistry**

At 10 degree Celsius a sample of carbon dioxide gas has a volume of 25.5 mL under pressure of 758 mmHg. What would the volume of the CO2 sample be at STP?
*November 5, 2010*

**Chemistry**

Suppose a mixture of hydrogen and oxygen gas is exerting a pressure of 1.60 atm. If the partial pressure of oxygen in the mixture is 304 mmHg atm, what is the partial pressure of the hydrogen?
*November 5, 2010*

**Chemistry**

A rigid container of O2 has a pressure of 3.5 atm at a temperature of 713 K. What temperature would be needed to achieve a pressure of 6.0 atm?
*November 5, 2010*

**PHYSICS**

NEED HELP ON THE ANSWER OF THIS PROBLEM THE EFFICIENCY OF THE PULLEY DECREASES WITH A COEFFICIENT OF FRICTION OF 2.0 THE EFFICIENCY OF THE PULLEY IS 60% WHAT WOULD YOU EXPECT THE EFFICIENCY TO BE IF THE COEFFICIENT OF FRICTION INCREASED TO 0.3
*November 1, 2010*

**manaegerial economics**

iven a firm’s demand function, P = 24 - 0.5Q and the average cost function, AC = Q2 – 8Q + 36 + 3/Q, calculate the level of output Q which a) maximizes total revenue b) maximizes pr
*October 30, 2010*

**5th grade**

2 22 12 132 122 1342? What is next and what is the pattern
*October 29, 2010*

**Chemistry**

6M NaOH**
*October 28, 2010*