Saturday

November 22, 2014

November 22, 2014

Total # Posts: 1,385

**Maths**

Please can you expand and simplify the following: (2x-5)(x+3) Many thanks. Happy New Year
*January 1, 2010*

**Pre Cal**

What is the value of: sin^-1 0.6349, sec^-1 0.5496, tan^-1 0.3457
*December 23, 2009*

**Chemistry**

One last question.... Which of these two metals (Aluminum or Copper) would be a better choice to make silverware out of? Specific heat of: Al = .901 Cu = .39 my guess was the aluminum, because it would take longer for it to get hot, since it requires more heat. This would ...
*November 30, 2009*

**AP Chemistry**

thanks :] its a weird question, I must add :-/
*November 30, 2009*

**AP Chemistry**

One last question.... Which of these two metals (Aluminum or Copper) would be a better choice to make silverware out of? Specific heat of: Al = .901 Cu = .39 my guess was the aluminum, because it would take longer for it to get hot, since it requires more heat. This would ...
*November 30, 2009*

**AP Chemistry**

But what if we weighed the metal before?
*November 30, 2009*

**AP Chemistry**

okay, so i'm working on a specific heat lab right now. I have one question that I am really stuck on... Here it is: Why should the metal be dry before dropping it into the calorimeter? ... is it because it affects the heat of the cube or it affects the mass of water? ... i...
*November 30, 2009*

**AP Chemistry**

okay, so i'm working on a specific heat lab right now. I have one question that I am really stuck on... Here it is: Why should the metal be dry before dropping it into the calorimeter? ... is it because it affects the heat of the cube or it affects the mass of water? ... i...
*November 30, 2009*

**Music**

what is baroque music???
*November 27, 2009*

**Physical Science**

yellow because the mixing of red and green light s makes yelloiw part b is black puting a blue object with red and green light will appear black decause red ,green and blue are primary colors
*November 14, 2009*

**reiny**

thanks reiny--but i'm in 6th gr and we r not studying powers..can you help me with a simpler answer without powers?
*November 12, 2009*

**multiplying metrics**

im in 6th grade--we have a math problem to multiply 3km x 200m x5 can you walk me thorough how to get the answer? Thanks
*November 12, 2009*

**math**

3km x 200m x 5 Can someone help me with this?
*November 12, 2009*

**us history**

How did the early people of California change their ways of life as their environment?
*November 12, 2009*

**Physics**

A student of weight 661 N rides a steadily rotating Ferris wheel (the student sits upright). At the highest point, the magnitude of the normal force FN on the student from the seat is 549 N. (b)What is the magnitude of FN at the lowest point? _________N (c) If the wheel's ...
*November 4, 2009*

**Literature I**

The Dove by Ewan McColl Well the dove she's a pretty bird, and she sings as she flies She brings us glad tidings and she tells us no lies Well she flies in the mountains and the valley so low And if you live peaceful then she never will go Come all you young men, take a ...
*October 30, 2009*

**Physics**

A puck of mass m = 1.26 kg slides in a circle of radius r = 25.0 cm on a frictionless table while attached to a hanging cylinder of mass M = 2.04 kg by a cord through a hole in the table. What speed keeps the cylinder at rest? _________m/s
*October 30, 2009*

**Literature I**

The Dove by Ewan McColl Well the dove she's a pretty bird, and she sings as she flies She brings us glad tidings and she tells us no lies Well she flies in the mountains and the valley so low And if you live peaceful then she never will go Come all you young men, take a ...
*October 29, 2009*

**Physics**

The two blocks (m = 37 kg and M = 109 kg) in the figure below are not attached to each other. The coefficient of static friction between the blocks is µs = 0.55, but the surface beneath the larger block is frictionless. What is the minimum magnitude of the horizontal ...
*October 28, 2009*

**Physics**

A police officer in hot pursuit drives her car through a circular turn of radius 320 m with a constant speed of 74.5 km/h. Her mass is 55.0 kg. (a) What is the magnitude of the net force of the officer on the car seat? ______N (b) What is the angle (relative to vertical) of ...
*October 28, 2009*

**12th grade Physics**

how much tension must a rope withstand if it is used to accelerate a 1200-kg car vertically upward at .80 m/s^2?
*October 24, 2009*

**math(rational functions application)**

The average speed of a jet is 100km/h faster than a cargo plane. To travel 1400km, the cargo plane requires 25% more time than the jet. Find the average speed of the jet. This is the formula I figured out so far. V(average)=V(jet)-V(cargo 100km/h= d/t - d/t 100= [1400km/x] - [...
*October 22, 2009*

**Microeconomics**

The new york times reported that subway ridership declined after a fare increase: " There were nearly four million fewer riders in December 1995, the first full month after the price of a token increased 25 cents to $1.50, than in the previous December, a 4.3 Percent ...
*October 21, 2009*

**Physics**

a) Newton's law of motion states that the acceleration acting on a falling body (assuming no other forces) is x" = -g, where x(t) is the height of the object above the ground, t is time, and g is the gravitational constant. Find a general expression to describe...
*October 19, 2009*

**Physics**

a) Newton's law of motion states that the acceleration acting on a falling body (assuming no other forces) is x" = -g, where x(t) is the height of the object above the ground, t is time, and g is the gravitational constant. Find a general expression to describe...
*October 18, 2009*

**World Econ**

I've asked here before, and I'm sorry to say I need help again. Does anyone have a website or knows where I can get graphs of the world's food production and population. I can't find any on google. They have to be recent around 2007-2009. I can't find any ...
*October 18, 2009*

**Calculus**

Find the particular solution of the differential equation y"(x) - y(x) = 1+e^x Please help.
*October 16, 2009*

**4th grade English**

What is a good sentence using "terrority"
*October 15, 2009*

**Human Geography**

Thanks. Do you know where I can get info about food production in countries, as well?
*October 12, 2009*

**Human Geography**

I'm doing a research essay that has to prove how the Malthus theory can be applied to the modern world. I need around 5 countries as examples. They can include contradictions and examples of the theory. What are some countries? I can't use India or China, though.
*October 12, 2009*

**math**

But how do I justify my answer/use associative property?
*October 6, 2009*

**math**

Use the associative property of addition and the distributive property to justify that a(b+c+d) = ab +ac+ad Help? I don't know what it's asking..
*October 6, 2009*

**science**

Technician A and Technician B are examining the same substance. Technician A records the mass, volume, and weight of the substance and decides that it is sugar. Technician B records the melting point, density, and boiling point of the substance and decides that it is salt. ...
*September 27, 2009*

**grammar**

Special delicates lingerie detergent is unnecessary. Does this sentence need commas or is this sentence punctuated correctly?
*September 21, 2009*

**eth 125**

How can the country best prepare for the changing race and ethnicity of its current and future citizens?
*September 10, 2009*

**math**

the function f and g are defined by f(x)=1/2x+5 g(x)=x^2 Evaluate 1.g(3) 2. f inverse (6) 3.fg(2)
*September 9, 2009*

**10th grade english**

What is the climax in the book ((Underline or Italicize)---->The Bass, The River, and The Shelia Mant) by D. Wenthrell?
*September 8, 2009*

**Calculus**

what is the derivative of If y = x^m and y'= mx^(m-1) y" = ?
*September 5, 2009*

**cook**

what are the 3 different types of microorganism
*September 4, 2009*

**Lit**

thank you anyways :) someone should right chapter reviews for this book soon.
*August 31, 2009*

**Lit**

I know that there are no websites for study guides for the book "Chinese Cinderella" but i really need to review the book. I read it and i just need help finding a website that gives chapter by chapter reviews for it. Thanks :)
*August 31, 2009*

**american government before 1877**

senate opponents of the league of nations as proposed in the treaty of versailles argued that it?
*June 28, 2009*

**physics repost**

A quantity of an ideal gas is compressed to half" its initial volume. The process may be adiabatic, isothermal or isobaric. Rank those three processes in order of the work required of an external agent, least to greatest. doesn't adiabatic mean no work, so it would be...
*June 23, 2009*

**physics**

A quantity of an ideal gas is compressed to half" its initial volume. The process may be adiabatic, isothermal or isobaric. Rank those three processes in order of the work required of an external agent, least to greatest. doesn't adiabatic mean no work, so it would be...
*June 23, 2009*

**physics**

A quantity of an ideal gas is compressed to half" its initial volume. The process may be adiabatic, isothermal or isobaric. Rank those three processes in order of the work required of an external agent, least to greatest. doesn't adiabatic mean no work, so it would be...
*June 23, 2009*

**physics repost bobpursley**

The energy given off by 300 grams of an alloy as it cools through 50°C raises the temperature of 300 grams of water from 30°C to 40°C. The specific heat of the alloy (in cal/g C ) is: i know Q=CpM(delta T) but what is what? Responses * physics - bobpursley, Monday...
*June 22, 2009*

**physics**

The energy given off by 300 grams of an alloy as it cools through 50°C raises the temperature of 300 grams of water from 30°C to 40°C. The specific heat of the alloy (in cal/g C ) is: i know Q=CpM(delta T) but what is what?
*June 22, 2009*

**physics please!**

A 0.21 kg block oscillates back and forth along a straight line on a frictionless horizontal surface. Its displacement from the origin is given by x = (16 cm)cos[(16 rad/s)t + π/2 rad] What force, applied to the block by the spring, results in the given oscillation? why ...
*June 19, 2009*

**physics**

A 0.21 kg block oscillates back and forth along a straight line on a frictionless horizontal surface. Its displacement from the origin is given by x = (16 cm)cos[(16 rad/s)t + π/2 rad] What force, applied to the block by the spring, results in the given oscillation? why ...
*June 18, 2009*

**help with physics please!**

2.50 kg particle (the function U(x) has the form bx2 and the vertical axis scale is set by Us = 2.0 J).(a) If the particle passes through the equilibrium position with a velocity of 55.0 cm/s, will it be turned back before it reaches x = 18.0 cm?(b) If yes, at what position (...
*June 18, 2009*

**physics**

THANK YOU SO MUCH!
*June 13, 2009*

**physics**

A 0.400 kg ball is shot directly upward at initial speed 40.0 m/s. What is its angular momentum about a point 2.0 m horizontal from the launch point, when the ball is a) at maximum height and b) halfway back to the ground? What is the torque on the ball about the point 2m from...
*June 13, 2009*

**college**

1. What is one way the U.S. legal system affects U.S. businesses? There are several ways the legal system can affect businesses but the one way the U.S. legal system affect U. S. businesses are the antitrust law which changed the way businesses operate. This law controlled ...
*May 31, 2009*

**10 GRADE GLOBAL**

is it choice 3
*May 31, 2009*

**10 GRADE GLOBAL**

one way in which the magna crata,the petition of right and the glorious revolution are similar is that each 1-strenghtened the power of the pope 2-led to the exploration of africalimited the power of the english monarchy 4-settled religious conflicts
*May 31, 2009*

**10 GRADE GLOBAL**

soo its choice 2
*May 31, 2009*

**10 GRADE GLOBAL**

sorrrrrrrryyyyyyy.. so its choice 1
*May 31, 2009*

**10 GRADE GLOBAL**

WELL, MOST RUSSIAN RULERS LIKED TO INVADE OTHER COUNTRIES
*May 31, 2009*

**10 GRADE GLOBAL**

I THINK ITS CHOICE 1
*May 31, 2009*

**10 GRADE GLOBAL**

THE FOREIGN POLICY OF MANY RUSSIAN RULERS SUPPORTED THE COUNTRYS DESIRE FOR 1.-ACESS TO INLAND CITIES 2.-MORE MINERAL RESOURCES 3.-EXTENSIVE CANAL SYSTEMS 4.-WARM WATER PORTS
*May 31, 2009*

**physics**

Oasis B is a distance d = 9 km east of oasis A, along the x axis shown in the Figure. A confused camel, intending to walk directly from A to B instead walks a distance W1 = 20 km west of due south by angle θ1 = 15.0°. It then walks a distance W2 = 32 km due north. If ...
*May 29, 2009*

**Math**

Translate into an algebraic expression. The product of 21% and sum number.
*May 29, 2009*

**Math**

Solve the following system of equations. x+3y=9 (1) x=3-3y
*May 29, 2009*

**math**

Is there a formula to sum the digits between two numbers? eg. 1 to 20 = 1+2+3+4+5+6+7+8+9+1+0+1+1+1+2+1+3+1+4+1+5+1+6+1+7+1+8+1+9+2+0 = ?? I am looking for the numbers 1 to 2008 so I really need a formula! Please help, thank you. Jane
*May 12, 2009*

**trig**

Give the measure of the acute angle with each given value to the nearest tenth of a degree. cos A = 0.1 (84.3 degrees) sec D = 1.8 (65.3 degrees) That is all it gives :( How would I go about solving this?
*April 29, 2009*

**Accounting Tax**

A taxable corporation faces a flat 35% marginal tax rate. What is the tax savings from an additional $100,000 deduction?
*April 20, 2009*

**Account Tax**

Frankland Company is an accrual method company, On December 30, 2003, it received a prepayment of $36,000 from a tenant, who is leasing a warehouse from Frankland. The payment represents the rental for the period January 2004 through December 2006. How much inocme does ...
*April 20, 2009*

**algebra**

Karen is 5 feet tall and her shadow measures 7 feet. A flag pole next to her casts a shadow of 28 feet. How tall is the flagpole in feet?
*April 10, 2009*

**1st grade**

thanks
*April 7, 2009*

**1st grade**

They all have scales. can i used this as a sentence
*April 7, 2009*

**1st grade**

He doesn't wants to read Snow White. Is that a sentence
*April 7, 2009*

**AP Bio**

Transpiration Lab- I need to calculate the rate for each of the treatments. Here is the data These are the results of an experiment that was done you need to graph the results and answer the questions. Class Average Cumulative Water Loss in ml/m2 Time (minutes) Treatment 0 10 ...
*April 6, 2009*

**Help me expand my paper PLEASE**

as many subtopics as possible, and thanks to everyone that contributed
*April 6, 2009*

**Help me expand my paper PLEASE**

I'm doing it on overfishing I need subtopics :[
*April 6, 2009*

**science-writing-research paper**

I need tips on how to expand a research paper..my subject is overfishing and I need help with what to talk about..like what are some subtopics? Help is greatly appreciated
*April 6, 2009*

**haha how do i respond to responses?**

omg i can't believe i just forgot c in part c. it's even called part c! and thank you for the help with part b. i completely forgot about that!
*April 2, 2009*

**calc**

i did this problem and it isn't working out, so i think i'm either making a dumb mistake or misunderstanding what it's asking. A particle moves along the x axis so that its velocity at any time t greater than or equal to 0 is given by v(t) = 1 - sin(2pi*t). a. ...
*April 2, 2009*

**reading**

what does this mean "by the skin of their teeth"
*April 2, 2009*

**science**

what types of materials are volcanoes like Mount St. Helens made of?
*April 2, 2009*

**science**

why does a cinder cone have such steep sides? PLEASE HELP THIANKS!
*April 2, 2009*

**science**

i found this from my textbook is it right it erupt violently releasing large qualities of ash and gas. its eruptions have rendered more than half of montserrat uninhabitabe. it caused widespread evacautions.
*April 2, 2009*

**science**

Describe the processes that have led to the formation of the Soufriere Hills volcano. how have the inhabitants of Montserrat been affected by this volcano?
*April 2, 2009*

**Business Communication**

D - I am not so sure about my answer
*March 31, 2009*

**Calculus**

There was a typo in last question A company estimates that the cost ($) of producing x units of a certain product is given by: C= 800 + .04x + .002x^2 Find the production level that minimizes the average cost per unit.
*March 30, 2009*

**Calculus**

I still do not see what the answer would be . Is x = .001
*March 30, 2009*

**Calculus**

Sorry for the typo - you are correct it should be -.002x^2
*March 30, 2009*

**Calculus**

Here's one more that I do not understand A company estimates that the cost ($) of producing x units of a certain product is given by: C= 800 + .04x + .0002x^2 Find the production level that minimizes the average cost per unit. Thank you so much
*March 30, 2009*

**Calculus**

This is the question - you are designing a rectangular poster to contain 256 in^2 of printing with a 3 " margin at the top & bottom and a 2 " margin at each side. What overall dinmensions will minimize the amount of paper used? Round to the nearest whole inch if ...
*March 30, 2009*

**Calculus**

Here's another one that I do not really understand. A company estimates that the cost (in dollars) of producing x units of a certain product isgiven by: C=800 + .04x + .0002x^2. Find the production level that minimizes the average cost per unit.
*March 29, 2009*

**HS Calculus**

Having trouble with this questions. Please help. A particle moves on the x-axis so that its position at any time t (is greater than or equal to) 0 is given by x(t) = 2te^-t a) Find the acceleration of the particle at t=0 b)find the velocity of the particle when its ...
*March 29, 2009*

**spanish**

How do you say great great grandmother and great great grandfather in spanish?
*March 5, 2009*

**college**

What was the result of your IAT, and do you feel that the test produced valid results in your case? o In your opinion, is it difficult to accurately measure prejudice? Why or why not? o Describe other measurements sociologists use to calculate prejudice
*March 3, 2009*

**Chemistry**

thx 4 the help.
*February 28, 2009*

**Chemistry**

Why might exposure to organic chemicals be a problem? Refer especially to halogenated hydrocarbons and alcohols. Help please. thx
*February 28, 2009*

**calculus**

f(x) = cos(x) - (cos(x))^2 for -pi is less than or equal to x is less than or equal to pi 1) x-intercepts? 2) x and y coordinates of all relative maximum points? 3) intervals on which f is increasing? then i have to sketch f, so tips on doing so would be appreciated. thank you!
*February 27, 2009*

**Aantomy**

How would damage to inter neurons in the spinal cord affect nervous system function?
*February 23, 2009*

**calculus**

thanks!
*February 21, 2009*

**calculus**

Find the exact value of: cos(arctan(2) + arctan(3)) Please explain how you got your answer. I have the answer, but I don't know how to get to it.
*February 21, 2009*

**i lied. very quick calc problem.**

f(x) = abs(sin(x)), -pi less than or equal to x less than or equal to pi g(x) = x^2 let H(x) = g(f(x)) i got that H(x) would equal sin^2(x). THIS IS WHERE I AM STUCK! find the domain of H. do i still need to account for "-pi less than or equal to x less than or equal to ...
*February 20, 2009*

**last calc question, i promise!**

the second one would be x = 2, resulting in the original point (2,1), i think. but other than that, thank you sooooo much!
*February 20, 2009*

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