Thursday

September 18, 2014

September 18, 2014

Total # Posts: 111

**Physics help please!**

Explain why the sum of the masses of the uranium nucleus and of the neutron does not equal the total mass of the products of the reaction. I guess its a theory question. Someone please explain!
*September 12, 2014*

**Physics Help!**

The Fly wheel has a small magnet of mass M mounted on it. Each time the magnet passes the coil, a voltage pulse is generated , which is passes to the c.r.o the display of the c.r.o is 10 cm wide . The flywheel is rotating at a rate of about 3000 revolutions per minute . Which ...
*September 11, 2014*

**Chemistry**

The relative molecular mass of a molecule of chlorine is 72. Which properties of the atoms in this molecule are the same? 1 radius 2 nucleon number 3 relative isotopic mass Answer: 1 only Can someone please explainnn! Thanks :)
*August 26, 2014*

**Chem**

Cyanohydrins can be made from carbonyl compounds by generating CN– ions from HCN in the presence of a weak base. In a similar reaction, –CH2CO2CH3 ions are generated from CH3CO2CH3 by strong bases. Which compound can be made from an aldehyde and CH3CO2CH3 in the ...
*August 25, 2014*

**AS Chemistry**

which ions are present in a solution of ethanol in an excess of concentrated sulphuric acid? 1 CH3CH2O- 2 CH3CH2OH2 3 HSO4- Explain please! Thanks :)
*August 22, 2014*

**Chemistry**

Full question: An alcohol of molecular formula C4H10O2 contains two OH groups and has an unbranched carbon atom chain. On reaction with excess hot potassium permanganate this alcohol is converted into a compound of molecular C4H6O4 To which carbon atoms in the chain of the ...
*August 22, 2014*

**Pure Maths**

Answer is dh/dt= m/min The volume when it's 1/8th full is Pi/12 I don't understand how they got that....
*August 16, 2014*

**Pure Maths**

I understand the rest but not the 1/8th of the volume part. Can you give me a further explanation on that? Thanks :)
*August 16, 2014*

**Pure Maths**

A container is in the shape of a right circular cone (inverted) with both height and diameter 2 meters. It is being filled with water at a rate of (pi)m^3 per minute. Fine the rate of change of height h of water when the container is 1/8th full(by volume). (Volume of a right ...
*August 16, 2014*

**statistics**

The students in your class with three children in their families are asked to state the number of boys in the family. What are the possible numbers? If X is the number of boys minus the number of girls in each of these families, state all the possible values of X. Make a table...
*August 4, 2014*

**Physics**

An astronaut of mass m in a spacecraft experiences a gravitational force F=mg when stationary on the launchpad. What is the gravitational force on the astronaut when the spacecraft is launched vertically upwards with an acceleration of 0.2g? A 1.2mg B mg C 0.8mg D 0 Ans= B ...
*July 1, 2014*

**Maths!**

Find the sum of all multiples of 5 between 100 and 300 inclusive. Ans: 8200 I do not know how to do this. Really do appreciate step by step workings and explanation. Thanks!
*June 7, 2014*

**Statistics**

How do you get 738/999??
*June 6, 2014*

**Statistics**

The registration numbers of vehicles in a certain country use digits 1-999. If a visitor has just entered the country. What is the probability that the first car he sees has at least 2 identical digits? Ans: 29/111
*June 6, 2014*

**Physics**

Intensity is the same? But the question states that it is halved? I don't quite get it........
*June 5, 2014*

**Physics **

A person is initially 8 m from a point sound source which emits energy uniformly in all direction at a constant rate. If the intensity of the source is to be halved but the sound is to be as loud as before, what distance should the person be from the source? Ans: 4 square root...
*June 5, 2014*

**Physics **

Two blocks A and B are connected by a light in extensible cord passing over a frictionless pulley. Block A starts from rest and moves up the smooth plane which is inclined at 30 degrees to the horizontal. Calculate at the moment that A has moved 4 m along the plane. (a) the ...
*June 1, 2014*

**Geometry**

All square and all rectangles are equilateral?
*March 24, 2014*

**Geometry**

thank you
*March 24, 2014*

**math**

Mrs. Zimmerman spent $55 at the grocery store. 40% of that she spent on meat. How much did she spent on meat?
*February 25, 2014*

**Maths**

Still don't think this is right. Mortgage is for $300,000 for 30 years, Fixed interest rate = 7% per year. Annual payments = $23,500 At end of 30 years, must make balloon payment. How much is the balloon payment? My teacher said it will be like making 3 payments at the end.
*February 12, 2014*

**Maths**

Mortgage is for $300,000 for 30 years, Fixed interest rate = 7% per year. Annual payments = $23,500 At end of 30 years, must make balloon payment. How much is the balloon payment?
*February 12, 2014*

**pre a-p math**

a playground is 100ft by 150 ft. you want to make a scale drawing of the playground on a 8.5 by 11 paper what scale could you use? please help
*February 5, 2014*

**Math **

The temperature at 6 a.m was 3° f. At noon it was it was 10° f. What was the change in the temperature ?
*January 8, 2014*

**pre algebra**

a 28 foot flagpole cast a shadow 95 feet long. a nearby person cast a shadow 17.5 feet long. how tall is this person
*December 16, 2013*

**Maths**

Thanks for your reply. The answer is correct!
*November 21, 2013*

**Maths**

I have a diagram in which AB is a vertical cliff. BC is a vertical building 80m in height. P is a point on level ground 200m away from A. The angle of elevation of the bottom of the building from P is 44 degrees. What is the angle of elevation of the top of the building from P?
*November 21, 2013*

**math**

DVD cases are 9/16" wide. If Juan has 60 DVDs, how many will fit on a 2 1/2 feet long shelf?
*September 30, 2013*

**English 12**

Yes my teacher assigned it today but I get it now, thank you!
*September 9, 2013*

**English 12**

"Dressing up for the Carnival" by Carol Shields Comment on the title of the story. What is "the carnival"?
*September 9, 2013*

**geometry**

a 27 feet tall ladder is placed so that it reaches 25 feet up on the wall of the house. How far is the base of the ladder from the wall of the house. Please help.
*September 1, 2013*

**geometry**

round to the nearest tenth. a rectangular plot of land is 80 meters wide and 98 meters long. Find the length of the diagonal and if necessary, round to the nearest tenth.
*September 1, 2013*

**Math**

You will be designing a park your park must contain the following a rectangle 100yds x 120yds . A picnic n playground area must be add up to be at least 1/2 of the park the picnic area must have a circular garden
*May 24, 2013*

**language**

Alright so all of those who look at this and have the same questions this should all be the same! Don't think just because you don't have the same class with them that the answers might be different. The answer for #1 is c and #2 is b. I took the assessment and I ...
*May 12, 2013*

**Language arts plz help~!**

Hello, I'm not from ur school but I get the same questions and answers as ur curriculum. I had this same assessment and for #2 Mrs. Sue is correct, it is stage directions. I know this because I took a shoot in the dark and went for stage directions instead of teleplay and ...
*April 25, 2013*

**Math**

Dr. Michael Lewis bought a bike that cost $455 plus 7 1/2 percent sales tax. Find the final cost
*April 18, 2013*

**Math**

Jessica wants to seed her backyard with grass seed. Her yard is 120 fet long and 90 feet wide. If Jessica buys bags of seeds that cover 600 square feet, how many bags of seed will she need?
*April 17, 2013*

**Physics**

A 4.1 kg bundle starts up a 31° incline with 148 J of kinetic energy. How far will it slide up the incline if the coefficient of kinetic friction between bundle and incline is 0.39?
*April 7, 2013*

**Physics**

You drop a 1.60 kg book to a friend who stands on the ground at distance D = 12.0 m below. If your friend's outstretched hands are at distance d = 1.40 m above the ground (see the figure), (a) how much work Wg does the gravitational force do on the book as it drops to her ...
*April 7, 2013*

**chemistry**

how do i balance SO3 + H2O = H2SO4
*March 7, 2013*

**Math**

Create 4 proportions that will work for the following scenario: If the scale is 3.5 in = 8 ft and the drawing measures 6 in, what is the actual distance?
*November 19, 2012*

**Physics**

A uniform ladder of length L and mass m leans against a frictionless vertical wall, making an angle of 56° with the horizontal. The coefficient of static friction between the ladder and the ground is 0.36. If your mass is four times that of the ladder, how high can you ...
*November 19, 2012*

**History---Modern World History**

Thank you so much!!! I really don't understand my teacher very well. She tries to explain but it makes no sense. I wrote a 7 paragraph essay on a total different subject one time, I ended up having to write it all over again.. Completely differently. Thanks again for your ...
*November 1, 2012*

**History---Modern World History**

Write a short paragraph that traces the rise of Japan from an isolated society to a major industrial and imperial power. I'm good at writing paragraphs but I really don't understand the question! If someone could explain to me what my teacher wants and how I should go ...
*November 1, 2012*

**social stody**

what parts of canada are good for growing crops
*October 23, 2012*

**chemistry**

If 0.500 mol NaN3 react, what mass in grams of nitrogen would result?
*October 23, 2012*

**6th grade math**

im studying exponents. 50 is my result number How did I get using exponents
*August 29, 2012*

**CHEM**

Pu-239 has a half-life of 24110 y. If 1.00 kg of this isotope is present in the used fuel rods of a nuclear power plant approximately how long will it take for this amount of Pu-239 to decay until there is less than 1 mg left ? Please help. I do not know how to do this question.
*March 14, 2012*

**accounting**

1. Describe the roles and responsibilities of management and independent auditors in the financial reporting process 2. Define the following three users of financial accounting disclosures and the relationships among them: a) Financial analysts b) Private investors c) ...
*October 31, 2011*

**Chemistry**

The boiling points of the following compounds increase in the order in which they are listed below: CH4 < H2S < NH3 Discuss the theoretical considerations involved and use them to account for this order.
*March 23, 2011*

**Chemistry**

If you were given 0.021 milligrams of the compound,H3PO4, what would the mass of H in the sample be?
*February 16, 2011*

**Math **

Write an equation of the line satisfying the given conditions Parallel to the line y=-4x+3 and a y intercept of -5 Please help I am really confused
*February 13, 2011*

**geometry**

I NEED HELP ON MY mATH!!!!!
*January 5, 2011*

**algebra 1**

a roll of carpet 9 ft wide is 30 ft longer than a roll of carpet 15 ft wide. both rolls have the same area. make a sketch and find the dimensions of each.
*October 28, 2010*

**chem**

Why do you think water is often called the universal solvent and what makes it such a good solvent?
*May 29, 2010*

**chemistry**

Why are the published values of the boiling points of substances always taken at 1 atm?
*May 25, 2010*

**chemistry**

Why are the published values of the boiling points of substances always taken at 1 atm?
*May 25, 2010*

**Chemistry**

(True or False) Wax is nonpolar, yet it exists as a solid at room temperature. Its solidity is best explained by the presence of dispersion forces.
*May 20, 2010*

**chemistry**

What type of intermolecular forces would you expect to find between molecules of H2O? of BrCl? of hexane (C6H14)?
*May 20, 2010*

**Chemistry**

How are the three types of intermolecular forces similar? How are they different?
*May 20, 2010*

**Business**

The U.S. cigarette industry has negotiated with Congress and government agencies to settle liability claims against it. Under the proposed settlement, cigarette companies will make fixed annual payments to the government based on their historic market shares. Supposed a ...
*May 17, 2010*

**Business**

This is all the information given in the problem. It does not give the average occupancy rate in the summer.
*May 17, 2010*

**Business**

A New Hampshire resort offers year-round activities: in winter, skiing and other cold-weather activities; and in summer, golf, tennis, and hiking. The resorts operating costs are essentially the same in winter and summer. Management charges higher nightly rates in the winter, ...
*May 17, 2010*

**Managerial Economics**

As vice president of sales for a rapidly growing company, you are grappling with the question of expanding the size of your direct sales force (from its current level of 60 national salespeople. You are considering hiring from 5 to 10 additional personnel QUESTION: How would ...
*May 15, 2010*

**Chemistry**

How are mm Hg, torr, psi, atm, and Pa related to each other mathematically?
*May 1, 2010*

**chemistry**

How are mm Hg, torr, psi, atm, and Pa related to each other mathematically?
*May 1, 2010*

**chemistry**

Why is carbon dioxide gas that carbonates fountain drinks stored in sturdy canisters?
*May 1, 2010*

**Math**

Leah liked to balance objects she found around the house using the science kit she got for Christmas. She found that 3 identical apples and a 5-gram weight exactly balanced a 50-gram weight. Leah said she could tell how much each apple weighed by solving the equation 3a+5=50. ...
*April 19, 2010*

**Global History**

thank you
*March 24, 2010*

**Global History**

reasons/causes why there was a fight for the holy land christians vs muslims.
*March 24, 2010*

**math 115**

evaluate: 30/5x3-2 --------- 2-2/3 ( /= divided by) is the correct answer 16/-4?
*November 3, 2009*

**Math**

Thanks ! Just wanted to make suree (:
*September 16, 2009*

**Math**

Alice has five shirts and three ties. How many possible outfits consisting of one shirt and one tie does he have?
*September 16, 2009*

**history**

What is Anne franks legacy?
*January 26, 2009*

**social studies**

how was alexander influenced by greek culture
*January 8, 2009*

**Francais**

Hi, thank you very much. Do you mind just re-checking it one more time for me! Thanks a ton!! Bonjour, Classe! Le nom de ma planète c’est asteroїde S-12. Sur ma planète il y a quatre objets symboliques qui me représent. Les étoiles pour ...
*November 25, 2008*

**Francais**

Could you see if these paragraphs need any corrections? Bonjour, Classe! Le nom de ma planète c’est asteroїde S-12. Sur ma planète il y a quatre objets symboliques qui me représent. Les étoiles pour ma source de joie, un chiffon pour ma ...
*November 25, 2008*

**Francais**

Sorry, but i never posted anything at 10:11 p.m. this is my first post at 10:53 p.m. But,thank you for your help. I appreciate it greatly.
*November 24, 2008*

**algebra, i just dont get it?!**

point slope?
*November 20, 2008*

**Spanish**

you did a good job on most of those!
*November 17, 2008*

**spanish 1**

el telefono esta cerca del escritorio :]
*November 17, 2008*

**3rd grade 1st year spanish**

the first two are right.. the other two arent. im latin i should know.
*November 16, 2008*

**Science! Plz help!**

I can't figure this out. The questions are 1. A 25 letter word for a endoplasmic reticulum connected to the ribosomes. 2. 14 letter word for packaging of materials inside the cell. 3. 11 letter word for sinle- celled organism that can live on it's own 4. a 15 letter ...
*September 8, 2008*

**math**

16,000 rectangles, 32,000 squares.
*September 8, 2008*

**11th grade English urgent**

What i would do is go to a dictionary, pick the definition that best fits it, and write that. Did that help?
*September 8, 2008*

**math ( factors)**

1,2, 4, 8, 16, 32, and 64
*September 8, 2008*

**Science**

I can't figure this out. The questions are 1. A 25 letter word for a endoplasmic reticulum connected to the ribosomes. 2. 14 letter word for packaging of materials inside the cell. 3. 11 letter word for sinle- celled organism that can live on it's own 4. a 15 letter ...
*September 8, 2008*

**9th grade**

what class is that from?
*September 4, 2008*

**Geography**

Thank you so much, I spent hours looking on google for a sight that could help.
*January 25, 2008*

**Geography**

I'm doing mapping and I need to put Bogota, Rio De Janeiro, and Buenos Aires on a map of the western hemisphere. I know if they're in north of south america, but I need exact location by Monday.
*January 25, 2008*

**math**

What's 9/10 of 10/7? I don't know how to divide 10/7. I know 10/7 = 1 3/10, but I cant divide it.
*January 22, 2008*

**Social Studies**

Thank you so much. That should help a lot.
*December 4, 2007*

**Social Studies**

What are the checks and balances? (In our government)
*December 4, 2007*

**Social Studies**

Thank you SO much!
*December 3, 2007*

**Social Studies**

What are four ways that congress can check the power of the president?
*December 3, 2007*

**math**

Sorry, I'm not the best at math whatsoever, I've already posted like 5 math questions.
*November 20, 2007*

**math**

The radius is 12 because 6 and 12 are 6 apart and 1 and 7 are 6 away. 6+6=12
*November 20, 2007*

**Math**

It's 81. 9x9=81. 81-36=65. 65+36=81
*November 19, 2007*

**Math- Fractions**

Thanx
*November 19, 2007*

**Math- Fractions**

I know this seems easy, but i stink at fractions. What is .105 as a fraction?
*November 19, 2007*