Saturday

December 20, 2014

December 20, 2014

Total # Posts: 291

**math**

How do I write an equivalent equation that does not contain fractions for 1/2 x -5 = 1/3
*December 6, 2014*

**Chemistry**

I'm not sure how to calculate the ΔH°rxn for 3 Al + 3 NH4ClO4 -> Al2O3 + AlCl3 + 3 NO + 6 H2O. I'm honestly not sure where to start with this problem.
*November 28, 2014*

**5th grade math**

how many flowers do I have if...1/4 are pink...2/5 of remaining flowers are red...18 are yellow
*November 18, 2014*

**Chinese**

My favorite: 我最喜欢 Wǒ zuì xǐhuān Egg: 蛋 Dàn Egg (specifically chicken): 鸡蛋 Jīdàn
*October 24, 2014*

**algebra 2**

Shalonda notices that when she stands next to the flagpole, she casts a shadow that is 8 feet long and that the flagpole casts a shadow that is 28 feet long. Little Shalonda is 4 feet tall. How tall, to the nearest foot, is the flagpole?
*October 21, 2014*

**Science**

If 2 cities on a globe is equal to 7cm, what is the actual distance between the 2 cities?
*October 15, 2014*

**Chemistry**

a 191 g piece of copper is heated to 100 C in a boiling water bath and then dropped into a beaker containing 755 g of water (density =1.00 g/cm3) at 4.0 C. What is the final temperature of the copper and water after thermal equilibrium is reached? (Scu=0.385 J/g•K)
*October 15, 2014*

**Chemistry 30 **

Calculate the delta H for the reaction : 2H3BO3(aq) reacts with B2O3(solid) + 3H2O
*October 13, 2014*

**math**

Represent 30 degree increase in temperature as an integer. Would that be +30?
*September 29, 2014*

**math**

Is the amount of tax collected proportional to the cost of an item after tax has been added?explain
*September 2, 2014*

**Math**

I am a number between 20 and 30. When you divide me into 6 equal groups,there is an even number in each group and 2 are left over.what number am I?
*July 9, 2014*

**statistics**

suppose you roll two number cubes and pick a letter of the alphabet at random. find the probability you will roll two odd numbers and pick one of the letters k, l, or m.
*June 4, 2014*

**art history**

Which of Michelangelo's sculptures is a metaphor for courage, determination, and strength?
*May 20, 2014*

**physics**

A 0.250-kg aluminum bowl holding 0.800 kg of soup at 27.0°C is placed in a freezer. What is the final temperature if 430 kJ of energy is transferred from the bowl and soup? Assume the soup has the same thermal properties as that of water, the specific heat of the liquid ...
*April 21, 2014*

**physics**

=(1/2 m v^2)(.69)/(m C)
*April 21, 2014*

**physics**

A piece of iron block moves across a rough horizontal surface before coming to rest. The mass of the block is 1.8 kg, and its initial speed is 3.8 m/s. How much does the block's temperature increase, if it absorbs 69% of its initial kinetic energy as internal energy? The ...
*April 21, 2014*

**pre-algrebra**

melind wants to paint the exterior lateral surface of her house. It is nine feet high and has a perimeter of 140 feet. each gallon of paint covers 300 square feet how many one gallon cans of paint does she need to buy to paint her house
*March 7, 2014*

**Math**

Assume you are working on a house the length of the house is 50 feet, the width is 30 feet, and from the ground to the gable is 10 feet. The height of the triangle prism on top is 6.5 feet. If you are going to shingle the roof of this house, how many square feet should you ...
*February 28, 2014*

**Correction**

Not understanding how to answer this You pore over the present evaluation: two intoxicated college females, one DUI and the other trying to run from police officers, both with no prior arrest, and both nursing majors at the local college. As judge, you must decide whether to ...
*January 31, 2014*

**Math (7th grade)**

7
*December 17, 2013*

**physics**

Two stones are thrown vertically up at the same time. The first stone is thrown with an initial velocity of 11.5 m/s from a 12th floor balcony of a building and hits hits the ground after 4.6 seconds. With what initial velocity should the second stone be thrown from a 4th ...
*September 10, 2013*

**Chemistry**

A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
*May 7, 2013*

**Chemistry**

A gas occupying a volume of 664 mL at a pressure of 0.970 atm is allowed to expand at constant temperature until its pressure reaches 0.541 atm. What is its final volume?
*May 7, 2013*

**language and art**

How to write a character sketch?
*May 1, 2013*

**7th Grade Language Arts**

yes 1( C 2( C 3( B
*April 4, 2013*

**Social Studies**

All I know is that it is Harrison. Can't remember why but it is.
*February 25, 2013*

**physics**

Just use (k*|q1|*|q2|)/r^2 It should come out as 1,638,427.5N
*February 19, 2013*

**math**

a pizza has a diameter of 18. what is the best estimate of the area of the pizza?
*February 8, 2013*

**Physics**

can anyone explain how they got their answer?
*January 23, 2013*

**Math**

1.5%h=12. What is h?
*January 9, 2013*

**physics**

A ferry boat is 6.2m wide and 7.1 m long. When a truck pulls onto it, the boat sinks 6.02 cm in the water. What us the weight of the truck? The acceleration of gravity is 9.81 m/s2. Answer in units of N
*December 19, 2012*

**PLEASE HELP**

PLEASE
*December 7, 2012*

**College Algebra and Finance**

Please help! Just need the answer... A lender gives you a choice between the following two 30-year mortgages of $200,000: Mortgage A: 6.65% interest compounded monthly, one point, monthly payment of $1283.93 Mortgage B: 6.8% interest compounded monthly, no points, monthly ...
*December 7, 2012*

**math**

A lender gives you a choice between the following two 30-year mortgages of $200,000: Mortgage A: 6.65% interest compounded monthly, one point, monthly payment of $1283.93 Mortgage B: 6.8% interest compounded monthly, no points, monthly payment of $1303.85 Assuming that you can...
*December 7, 2012*

**Math**

The difference between the two numbers is 14. The LCM of the two numbers is 16. Find the two numbers
*November 13, 2012*

**physics**

your completely wrong
*October 14, 2012*

**physics**

A car traveling in a straight line has a velocity of +3.3 m/s. After an acceleration of 0.71 m/s2, the car's velocity is +8.8 m/s. In what time interval did the acceleration occur?
*October 14, 2012*

**algebra**

Find the least common multiple of the monomials. 5a squared, and 16a cubed. Also 17b squared and 3b cubed. Could you show me how to do these. Thank you, Sandy
*October 10, 2012*

**math**

what is 2056 less than 22010
*September 26, 2012*

**math**

Use breaking apart method to solve 5 times 5, I'm not sure what this means
*September 17, 2012*

**algebra**

A rectangle has a length that is 5 feet more than its width. The area of this rectangle is 84 square feet. What is the width and length of this rectangle?
*September 13, 2012*

**algebra**

I dont understand this question How would you explain to your friend why the quotient of x*6 and x^2 is x^6 Remember your friend is questioning the rule, so you just cannot say it is the rule.
*September 7, 2012*

**math**

how do i factor the following equation? 3x^2=48
*August 29, 2012*

**ALGEBRA**

List the conditions when the sum of a positive number and several negative numbers will be positive. Include an example that represents your answer.
*August 10, 2012*

**prealgebra/ check answer please**

John who is an amateur golfer spends 3 hours every day practicing golf. What percentage of his waking hours does John spend practicing golf if he sleeps 9 hours a day? 24-9=15 3/15= 0.2 0.2 x 100 = 20% spent practicing
*June 24, 2012*

**prealgebra/ check answer please**

Thanks for checking :)
*June 24, 2012*

**prealgebra/ check answer please**

What single discount is equivalent to two successive discounts of 15% and 7%? x= 100 [1-(.85)(.93)] = 100 (1-.79) =100 (.21) =21%
*June 24, 2012*

**math/prealgebra**

5 is 20% of what number? I am so lost
*June 21, 2012*

**math**

11 - 8 ÷ (1/3 + 1/5) I need to know how to to this please show me. Thank you
*June 17, 2012*

**U.S. History**

How would I persuade someone that the Vietnam war was the most devisive war in American History?
*May 30, 2012*

**math/algebra**

Express 55 minutes as a fraction of 11/3 hours. Please show work
*May 29, 2012*

**algebra**

Express 55 minutes as a fraction of 11/3 hours. please this is doen.
*May 28, 2012*

**math**

Subtract the sum of 81.6 and 4.07 from 129.4 Please show how its done.
*May 28, 2012*

**statistics**

the life of light bulbs is distributed normally. The variance of the life time is 225 and the mean lifetime of a bulb is 590 hours. Find the probability of a bulb lasting for at most 603 hours. Yeah, WTF??? Why me!??!
*May 3, 2012*

**History**

I need some information on China's modern genocides and crimes against humanity staying the 20th century.
*April 27, 2012*

**Calculus grade 12**

a) 2cos2x b) 2cosx*cosx - 2sinx*sinx = 2cos2x c) double angle identity
*April 12, 2012*

**Chem Lab**

Thank you, it should say 'used' not 'sued'.
*April 11, 2012*

**Chem Lab**

Can the NH3/NH4Cl system be sued to prepare a buffer of a pH 9.5? why or why not? Can it prepare a buffer of pH 5? There were two buffers, 0.2 M and 0.1M.
*April 11, 2012*

**History**

Tell meabout Forced Sterilization and its sue int he U.S. What was the total number of people in the U.S. sterilized and the reasons why. How was this later imitated by the Nazi people?
*March 21, 2012*

**science**

Identify one harmful activity that humans do that might change the percentage of water that is available as a resource? Predict the possible effects this activity could cause to the food chains in that area, the changes in the number and types of organisms, and on the ...
*March 15, 2012*

**Social Studies**

What continent is located south of Europe in Medieval Europe?
*February 28, 2012*

**precal**

given tanx= (1/2) and cscx<0, find cos2x
*February 26, 2012*

**7th grade math**

Toby is making a model of a battlefield. The actual area is 11 miles by 7.5 miles. He wants to put the model on a 3.25 ft by 3.25 ft square table with at least 3 inches on each side between the model and table edges. What is the largest scale he can use?
*February 14, 2012*

**7th grade math**

Toby is making a model of a battlefield. The actual area is 11 miles by 7.5 miles. He wants to put the model on a 3.25 ft by 3.25 ft square table with at least 3 inches on each side between the model and table edges. What is the largest scale he can use?
*February 14, 2012*

**Geology**

I need help comparing and contrasting rocks and minerals.
*February 9, 2012*

**Physics**

Why did the chicken cross the road?
*December 13, 2011*

**algebra**

There are two similar triangles. The angles are: from top to bottom left: DE, from bottom left to right: EF, And from Top to bottom right corner: DF. DE: 10.32 cm.EF: 8.88 cm.FD 12.24 cm. The angles are: D,top,45 Degrees. E, bottom left corner, 79 Degrees. And F, Bottom right ...
*December 12, 2011*

**grade 12 math**

it is f(x)=x^3+8/x^2+x-6
*December 5, 2011*

**grade 12 math**

Given the function f(x)= x^3+8/x^2+-6, determine the eqaution of the asymptotes and state the end behaviours of the graph near the asymptotes.
*December 5, 2011*

**Physics-please**

When a sound wave passes from air into a solid object, which of the following wave properties change? -Frequency -Wave Speed -Amplitude -Wavelength all that apply
*November 10, 2011*

**Science**

When a sound wave passes from air into a solid object, which of the following wave properties change? -frequency -wave speed -amplitude -wave length Can be more than one
*November 10, 2011*

**Algebra**

Multiply and simplify (8v+4)(4x^2+9x+4)
*November 9, 2011*

**Physics**

A football bobble-head figure sits on your car dashboard. The 83-g head of the figure is attached to a spring with a spring constant of k = 21 N/m. You are driving along a straight road when you notice a series of hoses lying across the road, perpendicular to your motion, that...
*November 3, 2011*

**math**

aladder attached to the side of a ship has ten rungs each one foot apart visible above the water if the water level rises 1.5 feet per hour how many rungs will be visible after 3 hours
*October 27, 2011*

**Phisics**

A ball is dropped from the initial height h1 above the concrete floor and rebounds to a height of equal to 67% of the initial height h1. What is the ratio of the speed of the ball right after the bounce to the speed of the ball just before the bounce? This ratio is called ...
*October 6, 2011*

**Physics**

A Ferris wheel has a circumference of 93 m and it completes one rotation in 2.3 minutes without stopping. What is the percentage change in apparent weight (=weight difference/weight = W/W) of a passenger between the highest and the lowest positions on this Ferris wheel?
*September 21, 2011*

**calculus**

so then what does f equal and what does a equal
*September 16, 2011*

**calculus**

The limit as x approaches 0 of ((4^x)-1)/x The limit above represents the derivative of some function f(x) at some number a. Find f and a.
*September 16, 2011*

**calculus**

The limit lim as x approaches 1 of (x^12-1)/(x-1) represents the derivative of some function f(x) at some number a. Find f and a.
*September 16, 2011*

**calculus**

Find the value of the constant C that makes the following function continuous on (-infinity, +inf) f(x)={cx+2 if x is in (-inf,2] cx^2-2 if x i in (2, inf)
*September 16, 2011*

**Physics**

Can you help me through this one? I don't want just the answer: A ball is thrown straight up and rises to a maximum height of 24 m above the ground. At what height is the speed of the ball equal to half of its initial value? Assume that the ball starts at a height of 1.9 m...
*September 15, 2011*

**History**

I'm looking for information about the Black Death Plague without using Wikipedia as much as possible. Some questions that I need to keep in mind and answer are: How is religion relevant to the plague? Was there a cure? How did it start?
*September 14, 2011*

**Physics**

Top fuel drag racer can reach the maximum speed of 304 mph at the end of the 1/4-mile (402 m) racetrack. (a) Assuming that the acceleration is constant during the race, calculate the average value of the acceleration of the top fuel car. (b) What is the ratio of that ...
*September 1, 2011*

**Physics**

Consider two masses m1 and m2 connected by a thin string. Assume the following values: m1 = 4.18 kg and m2 = 1.00 kg. Ignore friction and mass of the string. 1) what is the acceleration of the 2 masses? 2)What should be the value of mass m1 to get the largest possible value of...
*September 1, 2011*

**Physics**

A ball is thrown directly upward with an initial velocity of 14 m/s. If the ball is released from an initial height of 2.8 m above ground, how long is the ball in the air before landing on the ground? Ignore air drag.
*September 1, 2011*

**Physics**

you my friend are a physics magician
*September 1, 2011*

**Physics**

In a tug-of-war between two athletes, each pulls on the rope with a force of 365 N. What is the absolute value of the horizontal force that each athlete exert against the ground?
*September 1, 2011*

**Physics**

If a car is travelling with a constant speed of 5.53 m/s in the Westward direction, what is the resultant force acting on it? Ignore friction
*September 1, 2011*

**Physics**

Which of the following represent examples of the following situation: An object that starts at the origin at t=0 and at some time later its displacement from origin is zero but the velocity is not zero: 1)An object in a uniform circular motion around a circle passing through ...
*September 1, 2011*

**Physics**

so what you're saying is: forceonblock3-mu(m3)=m3*a forceonblock3-0(m3)=... forceonblock3=...
*September 1, 2011*

**Physics**

what does u stand for in the above equations?
*September 1, 2011*

**Physics**

Three blocks rest on a frictionless, horizontal table, with m1 = 9 kg and m3 = 16 kg. A horizontal force F = 104 N is applied to block 1, and the acceleration of all three blocks is found to be 3.3 m/s2. 1) Find m2 2)What is the normal force between 2 and 3?
*September 1, 2011*

**MATH**

-3 is correct
*September 1, 2011*

**Physics**

Which of the following represent examples of the following situation: An object that starts at the origin at t=0 and at some time later its displacement from origin is zero but the velocity is not zero: 1)An object in a uniform circular motion around a circle passing through ...
*September 1, 2011*

**Vectors (Physics/Math)**

Vector A has a magnitude of 18 (in some unspecified units) and makes an angle of 25 with the x axis, and a vector B has a length of 24 and makes an angle of 70 with the x axis. Find the components of the vector C in the following: (a) C = A + B Cx = Cy = (b) C = A - B Cx= Cy=
*August 25, 2011*

**Physics**

Vector A has a magnitude of 18 (in some unspecified units) and makes an angle of 25 with the x axis, and a vector B has a length of 24 and makes an angle of 70 with the x axis. Find the components of the vector C in the following: (a) C = A + B Cx = Cy = (b) C = A - B Cx= Cy=
*August 25, 2011*

**math**

duck= d gull= g pelican= p dgp, dpg, gdp, gpd, pdg, pgd
*August 25, 2011*

**Physics**

A cheetah runs a distance of 101 m at a speed of 24 m/s and then runs another 101 m in the same direction at a speed of 38 m/s. What is the cheetah's average speed?
*August 25, 2011*

**PSY/300**

causal in the scientific sense..
*June 15, 2011*

**PSY/300**

what is causal observation ?
*June 15, 2011*