Friday

September 4, 2015
Total # Posts: 723

**Calculate the oscillation frequency f of the H2 mo**

When displaced from equilibrium by a small amount, the two hydrogen atoms in an \rm H_{2} molecule are acted on by a restoring force F_{x}=-k_1 x with k_1 = 510 N/m. Calculate the oscillation frequency f of the H2 molecule. Use m_eff = m/2 as the "effective mass" of ...
*April 15, 2010*

**Physics**

How do you find the phase constant of the oscillation on a graph.
*April 15, 2010*

**Pre Calculus**

Establish the following identity tan(x+pi/4)=1+tanx/1-tanx
*April 15, 2010*

**Pre Calculus**

Establish the following identity sin 2x/sinx - cos2x/cosx = secx
*April 15, 2010*

**Pre Calculus**

Establish the following identity Sin2x/1+cos2x=tanx
*April 15, 2010*

**math**

Suppose 100 dots are arranged in a square 10 × 10 array, and each dot is colored red or blue. (a) Prove that this array must contain a “monochromatic” rectangle. That is, no matter how the red and blue colors are assigned, there must be either a set of four red...
*April 15, 2010*

**Science**

what are ways plants can conserve water
*March 30, 2010*

**4gr math**

12*12
*March 18, 2010*

**algebra**

what is 3y(7y - 6) + 16y simplified
*March 16, 2010*

**algerbra**

f(X)=(x+1)2 that squared
*March 13, 2010*

**phsycis**

First you need to calculate the PE needed to make the climb. U=mgh U=(62*(2600-3700)*9.8) This value is energy or work denoted as a Joule. A Watt= Joule/Seconds So simply take your joules and divide it by the time the trip took. Convert your 5hr to seconds so... W=(62*(2600-...
*March 2, 2010*

**Chemistry**

What mass of CO2 could be absorbed by 1.34 g of CaO?
*February 28, 2010*

**PHYSICS**

A concert loudspeaker suspended high off the ground emits 35 W of sound power. A small microphone with a 1.0 cm2 area is 50 m from the speaker. (a) What is the sound intensity at the position of the microphone? (b) How much sound energy impinges on the microphone each second?
*February 25, 2010*

**Trigonometry**

1) Find the coordinates of the point (-1,3) after the transformation T (to the -3,2 power) 2) What are the coordinates of point (-3,4) under D (to the 3rd power)? 3) Which of the following transformations could map the point (1,2) onto the point (3,6)? a)T (to the 2,3 power) b...
*February 24, 2010*

**Trigonometry**

1) If P'(2,-6) is the image of point P after the dilation D(to the 2nd power), what are the coordinates of point P? 2) A transformation maps (x,y) onto (x+2, y-1). Find the coordinates of A', the image of point A(-2,6) under the same transformation.
*February 24, 2010*

**Trigonometry**

A translation maps (-6,2) onto (-4,-2). Find the image of (3,5) under the same translation.
*February 24, 2010*

**spanish**

1.¿Va a viajar a Perú tu primo Andrés?
*February 23, 2010*

**Honors 7 grade science**

2 ways that bacteria can change. (harmless to harmfull)
*February 2, 2010*

**probability**

I've got a different answer from the Actuary exam guide. You need to make a Venn Diagram and make x,y, and z into the middle portions of the diagram between AB, AC, and BC. From the question you know that x+y=1/4, x+z=1/3 and y+z=5/12. Adding these equations gives (x+y)+(x...
*February 1, 2010*

**english**

what's a good comparative essay title for catch-22 and slaughterhouse-five?
*January 20, 2010*

**english**

thanks, but i still don't understand
*January 20, 2010*

**english**

I really don't know how Slaughterhouse-five and Catch-22 use similar motifs to convey their anti-war message?? I don't understand how their anti-war message is similar if that makes more sense.
*January 20, 2010*

**Pre-algebra**

I can't figure out how to solve: Question #1: Two number cubes are rolled and a coin is tossed. Find the number of possible outcomes. Question #2: What is the probability of winning a lottery game where the winning number is made up of 6 digits from 0-9 chosen at random.
*December 3, 2009*

**4th grade math**

The first question states that Jeff runs 25 miles a week. He wants to run more than 25 miles. If Jeff runs 3 more miles each week, how many miles will he be running 6 weeks from now?
*November 23, 2009*

**4th grade-math**

Jeff runs 52 miles a week. How many weeks have passed since he was running 25 miles a week?
*November 23, 2009*

**Math problem I need help with**

Combination of coins that can be used; fifty-cent piece, quarters, dimes, nickels, and pennies Q: My 3 types of coins total 37 cents. I have fewer than 4, but more than 1, of each coin. What are the coins?
*November 9, 2009*

**Math**

Is this a quadratic or linear function? Identify the quadratic,linear, and constant terms 3(x-2)^2+12x
*November 3, 2009*

**math dividing**

how do i divide stuff like this 1.06 Divided 0.06
*October 28, 2009*

**Math**

find the vertex, axis of symmetry,y int and third point 3x^2-12x+10 Can someone give me a youtube link for this
*October 25, 2009*

**Math**

determine the dimensions of each matrix product A X B 2X3 3X5 G X C 4X7 7X1
*October 14, 2009*

**Algebra**

Ok, I remember a little bit I should subtract z from both sides so I get u-z=vw+z-z which simplifies to u-z=vw but I can't remember from there.
*October 14, 2009*

**Algebra**

u=vw+z. I need to solve for v. Can this be done? or is the answer just u=vw+z?
*October 14, 2009*

**Algebra**

The formula to compute a person's body mass index is B=703*w/h2 B represents the body mass index, w is the person's weight in pounds and h represents the person's height in inches. I need to: a. solve the formula for w. b. What is the weight to the nearest pound of...
*October 14, 2009*

**Algebra**

If each lap in a swimming pool is 100 meters long how many laps does it take to go a mile. I know there are 1609.344 meters in a mile, but what do I do from there?
*October 14, 2009*

**Math**

Solve using substitution method 2x-7y=-6 x=5y
*October 1, 2009*

**algebra**

density=8.48g/mL mass=1.83 kg volume=
*September 24, 2009*

**math**

7\8,8\10,2\3
*September 22, 2009*

**Chemistry**

An isotonic solution contains 0.88% NaCl by mass per volume. Calculate the percent mass per volume for isotonic solutions containing each of the following solutes at 15 degrees C. Assume a van't Hoff factor of 1.9 for all ionic solutes. KCL NaBr Glucose
*September 17, 2009*

**Language**

What part of speech is the word "color" in the sentence: His hair is the color of shimmering gold. I think it is a noun.
*September 15, 2009*

**algebra**

2 4 - - - a b
*September 15, 2009*

**6th grade Math**

whats the divisibility rule for 90
*September 8, 2009*

**Maths**

Eleven people, 7 men and 4 women, successfully completed their study at the School of Astronautics. A team of 6 people needs to be selected from them for the next intergalactic travel. In how many ways can 6 astronauts be selected, if at least 2 women and 3 men must be in the ...
*July 15, 2009*

**math**

thank you so much
*June 16, 2009*

**math**

Oh, it was me who posted the last post as anonymous, i forgot to put my name in!
*June 16, 2009*

**math**

I have the same question as Sally: What is the prime factorization of 225? Or, just how do you find prime factorization??? Thanks.
*June 16, 2009*

**English/Music**

I need to come up with a song that has lyrics that are full of schemes and tropes and it must be school appropriate and a current hit. I have no idea what to pick, any ideas?
*June 3, 2009*

**math**

30 is added to 1/3 of a number. the results is double the number. What is the number?
*May 14, 2009*

**Calculus**

Yeah?
*May 6, 2009*

**Calculus**

Is the function F(x)= the square root of 1-x^2 continuous at x = 1? Give the reason for your answer.
*May 6, 2009*

**Physical Science**

How are energy, work, and power related?
*May 5, 2009*

**6thgrade math**

how many feet are in 3 yards
*April 29, 2009*

**socail studies**

why was the roman coliseum built please respond quikly thanks ~tyler
*April 27, 2009*

**math**

Kendis types 150 words in 2 min, how many words does she type in 1 min? And how do you get the answer!..thanks
*April 20, 2009*

**Math**

A piano has 88 keys. Show with numbers the probability of hitting a particular key if you shut your eyes and strike one key.
*April 3, 2009*

**physics**

How much work in joules is done by a person who uses a force of 25 N to move a desk 3 m? Show work and formula.
*March 24, 2009*

**math**

how do you determine whether{(1,4),(2,6),(3,7),(4,4)} is a function????
*March 19, 2009*

**English/Social Studies**

I have to pick a topic that involes oppression in recent times. A lot of other kids picked oppression against homosexuals and racial oppression. I want to stand out from the other kids in my classand I have no clue what to pick. It needs to be attention grabbing and draw the ...
*March 15, 2009*

** 6th math**

how to find pie
*March 3, 2009*

**math**

a number between 1 and 100. If it is divided by 3 or 5, remainder is 1. If it is divided by 7, there is no remainder: what is my member?
*February 19, 2009*

**math -please help!! asap**

what is the vertical and horizontal difference between the two eqautions on a graph? Here are the eqautions- y=2x+3 y=2x-4 please help me on this. These two eqautions when graphed are parralell to each other i believe. But im not sure how to calculate the difference in ...
*February 16, 2009*

**math**

what is the vertical and horizontal difference between the two eqautions on a graph? Here are the eqautions- y=2x+3 y=2x-4 please help me on this. These two eqautions when graphed are parralell to each other. But im not sure how to calculate the difference in vertical and ...
*February 16, 2009*

**Chemistry/Dimensional Analysis**

The EPa detection limit for phosphate in water samples is 0.0450 milligrams per liter. Can phosphate be detected if 55.0 nanograms are found in 500.0 mL of solution? Show your calculations and explain.
*February 8, 2009*

**Chemistry/Dimensional Analysis**

The EPa detection limit for phosphate in water samples is 0.0450 milligrams per liter. Can phosphate be detected if 55.0 nanograms are found in 500.0 mL of solution? Show your calculations and explain.
*February 8, 2009*

**Spelling**

analogy flower is to rose as tree is to what?
*January 28, 2009*

**math**

i have 5 coins, penny, nickel,dime,quarter and a loonie. Ho many different amounts of money could i pay using any combinations of these coins?
*January 28, 2009*

**Math word gr 8**

For the month of January, the average afternoon temperature in Calgard is 1/4 the average morning temperature. The average afternoon temperature is -4 C. What is teh average morning temperature? a.) If m represents the average morning temperature, what equation models this ...
*January 26, 2009*

**8th grade**

People can be left-handed, right-handed or ambidextrous. The number of boys in Canadian secondary schools who are left handed is about 1/7 the number of boys who are right-handed. About 11% of boys are left-handed. Write and solve an equation to determine what percent of boys ...
*January 26, 2009*

**8th grade - math**

3 = y/-4 Does y = 12? Show the work
*January 26, 2009*

**Science**

i don't care
*January 22, 2009*

**Literature**

From Act I of "Julius Caesar"/ 1) How do the workmen celebrate as the play begins? 2) Who does their celebration annoy Flavius and Marullus? 3) What warning does the soothsayer give to Caesar? 4) What does Caesar's reaction tell you about him?
*January 22, 2009*

**Math intermediate algebra**

how do i find the prediction equation for a given set of data? Final tomorrow plzz help
*January 22, 2009*

**Intermediate Algebra**

how do you find the prediction equation for a given set of data? plz help final tomorrow!!
*January 21, 2009*

**MAtH**

16 gallons. add 175 and 225 together and divide them by 25.
*January 21, 2009*

**math**

200 by 100
*January 21, 2009*

**Math**

are these in correct order from least to greatest 100feet, 10,000inches, 1km, 1 mile
*January 21, 2009*

**Math**

ok so it would be 100ft, than 10,000in than 1 km & 1 mile correct?
*January 21, 2009*

**Math**

put these in order from least to greatest 1 kilometer, 1 mile, 100 feet, 10,000inches. I believe it would be 10,000inches, 100ft, 1km, 1 mile?
*January 21, 2009*

**Math**

A swimming pool is 50 meters long. If I swim 60 lengths of the pool each day for one week (7 days) how many kilometers did I swim? Would the answer be 1050km? 50m * .05km * 60 *7 = 1050km
*January 21, 2009*

**math**

if I have 1/2 liter of while and drink another 750 milliliters of water how many liters of water did I drink in all? I believe it is 1 and 1/4 is this correct?
*January 21, 2009*

**Math**

How do I convert mg to g? Do I divide the number by 1000? For instance 950mg = how many g? I think it would be .95g if I divide the 950mg to g correct or??
*January 21, 2009*

**Math**

If a chef uses 200 grams of ground beef to make one hamburger patty, how many patties can he make from a 5 kilogram package of ground beef. I believe the answer would be 25 patties, but not too sure how I got that answer and if it's correct
*January 21, 2009*

**Math**

which measure is not equivalent to the others? 0.0048km, 4800mm, 48cm, 4.8 meters I believe the answer is 48cm. It should actually be 480cm correct?
*January 21, 2009*

**Introduction To Teacher Aide**

1 is A 2 is B 3 is C 4 is B 7 is C 8 is A 11 is B for sure and im to lazy to answer the rest
*January 9, 2009*

**biology**

How does the process of photosynthesis impact the flow of energy and the cycling of nutrients
*January 8, 2009*

**4th grade**

1296
*January 8, 2009*

**Biology**

Describe the feedback mechanism that occurs at the stomates of plants.
*January 4, 2009*

**8th grade**

What federal officials are elected for the longest terms?
*December 14, 2008*

**science**

what does the addition of salt to water do to the density and how would you explain it
*December 10, 2008*

**French**

can you help me with the first one so I can get some idea? bay-euh-air-enn
*December 3, 2008*

**French**

Using the French Alphabet, write out the capital of French speaking countries that are spelled below. bay-euh-air-enn ell-ew-eeks-euh-emm-bay-oh-ew-air-zhjay I can't figure these out. Can you help? Maybe get me started?
*December 3, 2008*

**Trigonometry**

Thank you!
*November 29, 2008*

**geo again last 2**

Start studying!
*November 17, 2008*

**Math gr 8**

thank you
*November 4, 2008*

**Math gr 8**

Nope - need help the whole way - supposed to be about ratios
*November 4, 2008*

**Math gr 8**

Neil ran 1500 m in 6.5 min. Dario ran 400 m in 1.5 min. Whose average speed was greater? Show work
*November 4, 2008*

**English**

I have a paper that is due tomorrow and I need to include my personal interview,and it has to be APA format.Are there any example paper that I can get an Idea of how its suppose to go
*October 25, 2008*

**7th grade**

how do you identify complements?
*October 22, 2008*

**math**

It's zero because negative numbers are the opposite of non-negative numbers. For example, you can rewrite ideas you are already familiar with using negative numbers: 1 - 1 = 1 + -1 = 0 -1 - 1 = -1 + -1 = -2 -1 - -1 = -1 + --1 = -1 + 1 = 0 Two negative signs on the same ...
*October 19, 2008*

**math**

26 letters in the alphabet 10 numbers (0-9) An easy way to think about it is like this: If you have one number there are ten possible numbers (0-9). If you have two numbers you know that there are 10 possible numbers for each position (00-99), which is 10*10 . Letters have 26 ...
*October 18, 2008*