Saturday

December 20, 2014

December 20, 2014

Total # Posts: 188

**chemistry**

how many moles of CO2 are produced if you start with 3 mol of CaCO3? balanced equation is: CaCO3--->CaO=CO2
*October 5, 2011*

**Budget**

that isnt it
*October 1, 2011*

**Physics**

A particle travels between two parallel ver- tical walls separated by 39 m. It moves to- ward the opposing wall at a constant rate of 8.8 m/s. It hits the opposite wall at the same height. The acceleration of gravity is 9.8 m/s2 . 39 m 9.8 m/s2 8.8 m/s a) What will be its ...
*September 18, 2011*

**physics**

A football is thrown upward at a(n) 37 angle to the horizontal. The acceleration of gravity is 9.8 m/s2 . To throw a(n) 57.8 m pass, what must be the initial speed of the ball? Answer in units of m/s
*September 11, 2011*

**Physics**

A parachutist descending at a speed of 19.6 m/s loses a shoe at an altitude of 41.6 m. What is the velocity of the shoe just before it hits the ground? The acceleration of gravity is 9.81 m/s2. Answer in units of m/s
*September 5, 2011*

**Physics**

A car traveling at a constant speed of 33 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 2.62 m/s^2. How long after the trooper starts the chase does he overtake the speeding car? (answer in units of s)
*August 28, 2011*

**Physics**

A car traveling at a constant speed of 33 m/s passes a trooper hidden behind a billboard. One second later the trooper starts the car with a constant acceleration of 2.62 m/s^2. How long after the trooper starts the chase does he overtake the speeding car? (answer in units of s)
*August 28, 2011*

** college physics**

A 1100 kg wrecking ball hangs from a 14m-long cable. The ball is pulled back until the cable makes an angle of 17.0 degrees with the vertical.By how much has the gravitational potential energy of the ball changed?
*June 22, 2011*

**Math**

Solve the logarithmic equation. Please show all of your work. Loga(x+4) + loga(x-4) = 4
*June 8, 2011*

**Chemistry :( **

How much heat is evolved when 878 kg of ammonia is produced according to the following equation? N2(g) + 3H2(g) 2NH3(g) ΔH = -91.8 kJ
*April 20, 2011*

**Pre-Calculus**

what is the range of each of these equations? 1. 4sin(3x-1)+4 2. -4sin(-3x+1)-4 3. 2sin(1.5x+.5)+2 4. -2sin(-1.5x-.5)-2
*March 17, 2011*

**arithmetic**

First, you have to find the least common multiple of the number of days between eggs (2,3,4) to get 30. Then, you make a list of numbers 1-30: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
*March 16, 2011*

**Calculus Please someone help**

1. Find the slope m and an equation of the tangent line to the graph of the function f a the point (2, 38) 2. Find an equation of the line that passes through the point (9,7) and is perpendicular to the line 5x+3y-4=0
*March 2, 2011*

**Math**

subtact
*February 22, 2011*

**Math**

A toy manufacturer needs a piece of plastic in the shape of a right triangle with the longer leg 5cm more than the shorter leg and the hypotenuse 10 cm more than the shorter leg. How long should the sides of the triangles be?
*February 8, 2011*

**geography**

What does this mean? Nation-building can involve the use of propaganda or major infrastructure development to foster social harmony and economic growth.
*November 29, 2010*

**geography**

I did sorry the link wouldnt work before on the other post.
*November 26, 2010*

**geography**

What states dont get snow?
*November 26, 2010*

**Quick ?**

What states don't get snow?
*November 26, 2010*

**English**

Why do miracles come true and happen for the right people?
*November 24, 2010*

**Physics**

The motion of material particles in P-waves is A. Clockwise circles as seen from the side B. Counter-clockwise circles as seen from the side C. Parallel to the propagation direction D. Perpendicular to the propagation direction
*November 17, 2010*

**english**

it means she wants her mom
*November 16, 2010*

**6th grade**

What does 22x11= Thanks for your help!
*November 3, 2010*

**physics**

Please Help. I am not sure how to set up or do this problem. Thanks A car is traveling along a road, and its engine is turning over with an angular velocity of +199 rad/s. The driver steps on the accelerator, and in a time of 14.2 s the angular velocity increases to +263 rad/s...
*October 28, 2010*

**Math**

I understand how to make Stem-and-Leaf plots,but I don't understand what to count by if my numbers are (from least to greatest) 13,14,16,18,20,32,33,52,58,61,and 67.Please help me!!!
*October 18, 2010*

**Math**

If 30=100%, and going over my subtracts from 100%. What is my percentage if I get 39?
*October 7, 2010*

**trig**

How would I solve the following equation for x? 2 sin^2(x) + 3 tanx secx = 2 I've tried the problems from different approaches, but couldn't come up with a solution. Could you please provide your thought process. It would be greatly appreciated. Thanks!
*October 1, 2010*

**science**

a cookie a certain mass. explain why the mass would not change if you break the cookie in half.
*September 21, 2010*

**physics**

While standing on a bridge 15.0 m above the ground, you drop a stone from rest. When the stone has fallen 5.00 m, you throw a second stone straight down. What initial velocity must you give the second stone if they are both to reach the ground at the same instant? Take the ...
*September 9, 2010*

**physics**

A jetliner, traveling northward, is landing with a speed of 65 m/s. Once the jet touches down, it has 785 m of runway in which to reduce its speed to 5.0 m/s. Compute the average acceleration (magnitude and direction) of the plane during landing (take the positive direction to...
*September 7, 2010*

**physics**

In getting ready to slam-dunk the ball, a basketball player starts from rest and sprints to a speed of 6.2 m/s in 1.9 s. Assuming that the player accelerates uniformly, determine the distance he runs.I
*September 7, 2010*

**Math**

135
*March 3, 2010*

**painting**

plz can u help me i av to find out about three different types of lino printing and i dunno wat to look at let me know as soon as poss i need it now really thanx
*February 3, 2010*

**algrebra**

P=S1 + S2 +S3 for S2
*January 28, 2010*

**math**

how to round off to nearest million
*January 20, 2010*

**8th grade math**

thanks I got it
*January 19, 2010*

**8th grade math**

find the product of the only set of three consecutive prome numbers that differ by 2.
*January 19, 2010*

**Maths**

Thank you for your help.
*April 15, 2009*

**Maths**

The question says: Two pairs of touching sides are the same length. The diagonals meet at right angles. Opposite sides are not parallel. The diagonals bisect each other, but are different lengths. The diagonals do not meet at right angles. Angles are not right angles. Please ...
*April 15, 2009*

**9th grade - Algebra???**

how do i turn the following equations into standard form? -14x = 24 + 18y y = 9/2x - 7/2 -3y = -6 + 6x -20/3 = 5y + -5x y = 3/2x + 5
*April 4, 2009*

**Science**

What are the EPA's standards for the maximum amount of cadnium per liter of water? I went on their website, but I did not find any specific amount. Thanks for looking into this.
*March 20, 2009*

**Science**

What are byproducts of zinc and silver mining? Are they toxic enough to pollute water in large quantities? Thank you for thinking about this. I had a difficult time finding this on the internet.
*March 20, 2009*

**English**

So my sentences should be: I stopped to fix the flat tire. (infinitival) I stopped fixing the flat tire. (gerund) Is this correct?
*November 23, 2008*

**English**

Are these two sentences right using "I stopped?" gerund object - I stopped to fix the flat tire. infinitival object - I stopped fixing the flat tire.
*November 23, 2008*

**English**

Are these two sentences right? gerund object - I stopped to fix the flat tire. infinitival object - I stopped fixing the flat tire.
*November 23, 2008*

**English**

I am sorry, I was suppose to identify the main verbs then write sentences that used them as gerund direct objects and infinitival direct objects. Do I have the verbs correct?
*November 23, 2008*

**English**

I think I have these corrct, but I am not sure. Can someone tell me if I am right or wrong? direct object gerund The students downplay walking in the rain. (downplay) We enjoy surfing as a group. (enjoy) The children adore talking on the internet. (adore) The residents ...
*November 23, 2008*

**English**

Can someone check this and tell me if I did it right? The sentence is: Go and watch the children crowded around the beaches during the first week of summer. Go and watch Prep phrase and opt ADV the children NP1 and subject crowded around tr-vb and pred vb the beaches NP2 and ...
*November 20, 2008*

**English**

Are these two sentences correct? Adjectival prepositonal phrase: I like in our house the big kitchen to cook in. (in our house is the adjectival prepositonal phrase) Participal Phrase: I dislike ordering an item online to find a damaged package when it arrives. (damaged ...
*November 16, 2008*

**English**

Adjectival prepositonal phrase: I like in our house the big kitchen to cook in. (in our house is the adjectival prepositonal phrase) Participal Phrase: I dislike ordering an item online to find a damaged package when it arrives. (damaged package is the participal phrase)
*November 16, 2008*

**English**

Can some one tell me if my examples are correct or if I need to do them over? Adjectival prepositional phrase: I like playing basketball at the gym every other weekend. Post noun modifier: I like the sun when it is bright and hot in July. Participial Phrase: I dislike buying ...
*November 16, 2008*

**ict help asap**

i mean How ICT is used in the wider world. This section should include actual examples of how computers and technology are used in the areas of: • E-commerce (online shopping) • Manufacturing (e.g. CAD & CAM) • Education (e.g. encyclopaedias, the ...
*October 28, 2008*

**ict help asap**

How ICT is used in the wider world. This section should include actual examples of how computers and technology are used in the areas of: • E-commerce (online shopping) • Manufacturing (e.g. CAD & CAM) • Education (e.g. encyclopaedias, the internet) &#...
*October 28, 2008*

**reading**

dies or brakes all his bones
*October 28, 2008*

**English**

just as they are all right
*October 28, 2008*

**spanish**

how do you tell time?
*August 14, 2008*

**chem**

ahh i hate chemisty, i'm kindof slow too and everything confuses me in chem.!! i feel the same way as you:)
*May 29, 2008*

**Math**

Sorry, my problem is: 9^(x+6)=7^x
*April 12, 2008*

**Math**

Can someone tell me how they got the answer. Problem: 9^(x+6)=7x My answer was: -52.458 The correct answer is: -51.138 I have checked my input on my calculator, and cannot figure it out.
*April 12, 2008*

**math riddle ALGEBRA WITH PIZZAZZ**

What do you call a group of factory foremen who sing while drinking tab cola and eating crab apples?
*April 6, 2008*

**Graphing**

My answer is suppose to be x= -1/2. Is that correct?
*April 3, 2008*

**Graphing**

I need to find the symmetry of a polynomial function graph. Is this correct? f(x)=x^2+2x-1 x=-6/2x=-2/2*1 x=-2/2=-1 It is symmetric about x=-1/-2
*April 3, 2008*

**Algebra**

I have worked it more..... t=3+or-sqrt9+136/4 t=3+or-sqrt145/4 (is this my answer?)
*March 21, 2008*

**Algebra**

HELP! an object moves in a straight line given by s=2x^2-3t where s is in meters and t is the time in seconds the object is in motion. how long to nearest tenth will it take to move 17 meters? my attempt s=2t^2-3t 17=2t^2-3t -17=-17 0=2t^2-3x-17 t=-b +or- sqrtb^2-4ac/2a t=-(-3...
*March 21, 2008*

**Algebra**

Can someone help me, I am stuck and do not know how to complete. Maybe my first part is wrong, I don't understand by looking at my example if I am doing it right or not. Square root Property 2k^2 +144=0 2k^2 +144-144=0-144 2k^2=-144 This is where I am confused 2k=sqrt -144...
*March 17, 2008*

**Algebra**

use only positive exponents and all variables are real positive numbers y^9/8 / y^5/8 =9/5 (is this right?)
*March 13, 2008*

**Science**

Can someone tell me if I have these three correct? Are the following observations, predictions or hypothesis. I think: Birds eat worms when bugs are not available. Observation Infection is caused by bacteria. Hypothesis Honey is the food store for a bee hive. Observation
*March 12, 2008*

**science**

Are the following observations, predictions or hypothesis. I think: Birds eat worms when bugs are not available. Observation Infection is caused by bacteria. Hypothesis Honey is the food store for a bee hive. Observation
*March 12, 2008*

**Chemistry**

Tell what the function of lipids do in a cell. Is the correct answer: lipids function in a cell is to provide energy, act as structural components in a cell , and can help provide hormones
*February 23, 2008*

**Biology**

Tell what the function of lipids do in a cell. Is the correct answer: lipids function in a cell is to provide energy, act as structural components in a cell , and can help provide hormones.
*February 23, 2008*

**Organic Chemistry**

Thank-you for taking the time to help me understand the question. I think I understand, would the following statement be correct: Alcohol would not be a base, because in order to be a base the molecule must accept a proton.
*February 16, 2008*

**Organic Chemistry**

Alcohol has OH functionality, but do you expect it to be a base and why? I would expect it to be a base, but I am not sure why. Does anyone know?
*February 16, 2008*

**Chemistry**

Do you mean like this? Hydorgenation is when atoms of hydrogen H2 are added to the carbons in a double or triple bond of alkenes or alkynes to form what we call alkanes. More or less attaches to one of the carbon atoms in a double and OH-attaches to the other carbon atom of ...
*February 10, 2008*

**Chemistry**

It is organic and it is in alkenes.
*February 10, 2008*

**Chemistry**

Difference between hydration and hydrogenation reactions? I have searched everywhere in my book and all I can come up with is: Hydorgenation is when atoms of hydrogen H2 are added to the carbons in a double or triple bond of alkenes or alkynes to form what we call alkanes. ...
*February 10, 2008*

**Chemistry**

Is there someone out there that can tell me if I answered this right or if I need to study some more? Thanks What is it that makes water such a good solvent for polar substances? Why is it called the universal solvent? Water is such a good solvent for polar substances because ...
*January 31, 2008*

**Math**

We have to simplify complex numbers and I was wondering whether I did these problems correctly. 1. 4i^2-2i^3 = -4+2i 2. (-i)^3 = i 3. (the square root of a -2)^6= -8 4.1/(2i)^3 = i/8
*December 16, 2007*

**science**

what is the relative humidity of a kilogram of air at 25 degrees celcious that contains 10grams of water vapor
*October 2, 2007*

**Chemistry**

srry I placed the question in the wrong spot. The equation is 2NH3 <=> N2 + 3H2 1 mole of NH3 injected intoa 1L flask 0.3 moles of H2 was found the concentration of N2 at equlibrium is 0.1M how do I find the concentration of NH3 at equlibrium? (N2) = 0.1 (H2) = 0.3 ...
*May 8, 2007*

**early childhood**

Can someone please help me with this? I think I have the right answer--just need verification. Which statement most accurately describes "normal" growth and development of the pre-school child? 1.It occurs at a uniform rate for all chidren. 2.It is a simple process. ...
*April 11, 2007*

**Early Childhood Ed. Question--Please Help!**

To capitalize on children's different learning styles, teachers should: 1.teach lessons using a multi-sensory approach. 2.use their own learning style to teach and let the children match them. 3.separate children by learning styles and seat children near others like ...
*April 7, 2007*

**Early Childhood Ed..**

Would creating a sensory-rich classroom enviroment be an appropriate way for a teacher to help young children learn about aesthetics? I think that would be an exciting idea, and that children would enjoy it.
*April 7, 2007*

**Math**

A physician prescribes 3.5 mg. of medication each day. How many micrograms is this dosage? Thanx for the help! 1mg is 1000mcg. I am told that mcg is a "modern" abbreviation for microgram. So, I say 3.5 x 1000= 3500 mcg Right? thank you! correct What´s the ...
*February 28, 2007*

**Math**

A perscription calls for 5 ounces of medication. For how many millimeters is te perscription? (Use 1 ounce = 29.57 mL.) if 1oz = 29.57mL then you simply multiply: 29.57 x 5 Good job! Nice you are helping!
*February 27, 2007*

**Math--I need help!**

I have these two questions on my assignment. Please help me. 80 mi. = _______ km. 9 cm. = _______ m. 9cm (1m/100cm)=??? 80miles (1 km/1600m) one mile = 1.6093 km so 80 times 1.6093 = what? one cm = 1/100 m or .01 m so 9 cm = 9 times .01 = what? 9 cm = 0.09 m. 80mi.= 128.72km. ...
*February 27, 2007*

**Kim spent $20.00 on grocries. She had $50.00. how much did Kim spend?**

Kim spen $50.00 subtracted by $20.00 witch is $30.00 left!
*February 27, 2007*

**help!!**

what is the antomym for prohibit http://www.thesaurus.com =)
*January 16, 2007*

**Calculus**

Does x^4 * e^x have a horizontal asymptote? Take the derivative to see if slope is zero. dU/dx = x^4 * e^x = 4x^3 * e^x + x^4 * e^x So, what happens as x approaches neg large ?
*October 27, 2006*