Thursday

December 8, 2016
Total # Posts: 2,882

**physics**

A tire placed on a balancing machine in a service station starts from rest and turns through 10.8 revolutions in 8.48 s before reaching its final angular speed. Calculate its angular acceleration.

*March 14, 2011*

**chemistry**

addition of a strong acid would increase the solubility of which of the following salts AgCl CaSO4 CdS CaCO3 PbBr2 CaHPO4 Cd(OH)2 AuCl

*March 13, 2011*

**Physics**

The density of a 4.41-m long rod can be described by the linear density function λ(x) = 111 g/m + 12.3x g/m2. One end of the rod is positioned at x = 0 and the other at x = 4.41 m. found total mass of rod to be: 609 grams need help finding : the center-of-mass coordinate...

*March 10, 2011*

**Physics**

The density of a 4.41-m long rod can be described by the linear density function λ(x) = 111 g/m + 12.3x g/m2. One end of the rod is positioned at x = 0 and the other at x = 4.41 m. found total mass of rod to be: 609 grams need help finding : the center-of-mass coordinate...

*March 10, 2011*

**Chemistry**

Thanks! So do all polyatomic ions have a coordinate bond?

*March 9, 2011*

**Chemistry**

How do you know when to use a coordinate bond with molecular compounds?

*March 9, 2011*

**math**

Determine whether the graph of each function is symmetric with respect to the origin. F(X)=-12/x

*March 9, 2011*

**physics**

A book weighing 29 N is placed on a table. if the support force back on the book from the table is 29 N, what is the net force?

*March 8, 2011*

**Chemistry**

Please help me understand!..If you have 100.0mL of a 30.0% aqueous solution of ethanol, what volume of water is in the solution?

*March 8, 2011*

**6th grade math**

1,650

*March 7, 2011*

**Physics**

A driver entering the outskirts of a city takes her foot off the accelerator so that her car slows down from 90 km/h to 50 km/h in 10 s. Find the car's average acceleration.

*March 6, 2011*

**Physics**

For a physics lab involving watchnig a gldier move down an air track with uniform acceleration, and recording the results in a table then graphing the results,do I include that "Observations were held and results were recorded in a table. Two graphs, one position-time and...

*March 6, 2011*

**Chemistry**

which of the following has the largest radius A. CI- B. S2- C. K+ D. Ar E. Ca2+

*March 5, 2011*

**math**

how many animals die from deforestation in costa rica each year?

*March 5, 2011*

**chemistry**

in a exothermic reaction ________ energy is converted to ________ energy. A. potential, kenetic B. kinetic, potential C. thermal, potential D. heat, thermal

*March 5, 2011*

**Chemistry**

if a 100g sample of water at 60.0 C is added to a 100.0 g sample of water at 10.0 C, determine the final temperature of the water. Assume no heat is lost to the surroundings

*March 5, 2011*

**chemistry**

what is the specific heat of silver if it takes 0.300 joules of enegry to raise 0.500 grams of silver from 25.0 C to 27.5 C?

*March 5, 2011*

**chemisty**

A 5.10-g sample of iron is heated from 36.0 C to 75.0 C. The amount of energy required is 89.5 J. the specific heat capacity of the sample of iron is?

*March 5, 2011*

**literary**

Are there any literary elements in the first part of Nineteen Minutes by Jodi Picoult??

*March 4, 2011*

**math 5TH GRADE**

Marie measured angle KLM .what mistake did she make?

*March 2, 2011*

**Math**

A basketball team scored 48 baskets in 1 game. Each basket was worth one or two points. If the team scored 84 points, how many one- point and two-point baskets did it score?

*March 1, 2011*

**science**

what is the process of fotosinthesis

*February 28, 2011*

**Statistics**

I didn't realize how simple that was x) thanks so much!

*February 27, 2011*

**Statistics**

To determine whether themean nicotine content of a brand of cigarettes is greater than the advertised value of 1.4 milligrams, a health advocacy program tests: Ho: mu = 1.4 Ha: mu > 1.4 The calculated value of the test statistic is z = 2.42. ==> How do I calculate the p-...

*February 27, 2011*

**ITE**

What is the defenition for research?

*February 27, 2011*

**Yr 10 PE**

Btw 'Teacher' do you happen to know anyone named Mackenzie Farmer in year 10? Because she told me about this website and that it was alright to use. And what have I done wrong, I wrote out exacly what was on the sheet, just in a simpiler form?

*February 27, 2011*

**Yr 10 PE**

999babe999- its a different Emily than the one that asked the question.

*February 27, 2011*

**Yr 10 PE**

Jeeze it sounds just like the assignment I got the other day. Pick either one of the road saftey ads and do the following: 1. Write what the purpose of the road saftey ad. 2. Write down how it is effective. 3. Say why funding should or should not be cut by the Government based...

*February 27, 2011*

**Yr 10 PE**

I don't seem to understand this question can you please paraphrase this. Task Outline: Outline the purpose of ONE health promotion initiative related to road safety, assess the effectiveness of this initiative and justify funding for road safety initiatives. Task ...

*February 27, 2011*

**Physics**

Is the trend for ionic radius just that for metals, they are smaller than the nuetral atom and for non-metals, and for non-metals, they are bigger than the neutral atom? Or is there another specific trend?

*February 26, 2011*

**North & Central America**

What ensures Canada's cold climate?

*February 26, 2011*

**Physics**

This is wrong!

*February 25, 2011*

**Science**

Thanks Ms. Sue

*February 24, 2011*

**Science**

Is it A .. other forcs keep building up the land?

*February 24, 2011*

**Science**

For million of years, wind and rain have worn down the earth. The land is not totally level now because ____. a. other forces keep building up the land b. wind and rain cannot erode solid rock c. for most of those years, wind and rain were scarce d. wind and rain pile dirt ...

*February 24, 2011*

**Physics**

A block is released from rest at the top of an incline which makes a 30 degree angle with the horizontal. The incline is 12 m long and it takes the block 25 seconds to reach the bottom. What is the coefficient of kinetic friction, between the block and the incline?

*February 24, 2011*

**Chemistry**

The mass of the solution will change as a result of the newly added substance. Because of colligative properties, anytime something is added to solution, the freezing point is lowered and the boiling point is raised. Water does not conduct electricity on its own, and since ...

*February 23, 2011*

**Math**

Regina worked in the garden, she spent 1/4 hour planting beans, 3 3/4 minutes staking tomato plants, and 1/2 hour training the cucumber vines. How much time did she spend gardening? Explain your answer.

*February 22, 2011*

**calculus**

find the derivative of 3/ln(3z)

*February 20, 2011*

**Yr 10 English URGENT**

My last name starts with a B......

*February 20, 2011*

**Yr 10 English URGENT**

HEY SHIVI! I made it up on the day. I made something up about a boat about 2 sink and I was about to die. Nice story though. What did u get for it?

*February 20, 2011*

**Chemistry**

What's the relationship between ionization energy and electron affinity? I ionization eneergy deals with losing electrons and electron affinity deals with gaining electrons, but I don't know how to explain the relationship.

*February 18, 2011*

**Chemistry**

Explain which atom of the following pair have the smaller ionization energy: As, I

*February 18, 2011*

**Physics**

A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.93 V and a current of 2.7 A are induced in the coil. The wire is the re-formed into a single-turn square coil, which is used in the same ...

*February 18, 2011*

**Physics**

Yes, that's the question, but I'm confused as to how I should find the length.

*February 17, 2011*

**Physics**

A magnetic field is perpendicular to the plane of a single-turn circular coil. The magnitude of the field is changing, so that an emf of 0.93 V and a current of 2.7 A are induced in the coil. The wire is the re-formed into a single-turn square coil, which is used in the same ...

*February 17, 2011*

**bookkeeping**

just because someone ask for advice/a little help on an answer doesnt mean she/he is cheating

*February 15, 2011*

**Calculus**

find derivative of w(x)= (23e^x)/4^x

*February 14, 2011*

**Calculus**

f(t)=-4.9t^2+25t+3 meters what is the average velocity during the first two seconds? find the instantaneous velocity at t=2

*February 13, 2011*

**Physics**

A duck on a pond paddles 20 m [36Ëš N of E] and then paddles another 60 m[25ËšE of S]. Determine the duckâ€™s total displacement.

*February 13, 2011*

**Calculus**

find dz/dx when z= (ln 5)e^x

*February 10, 2011*

**Social Studies**

It is but I read through the section twice and I couldn't find anything that helped.

*February 9, 2011*

**Social Studies**

How was the culture of the Ottoman rulers similar and different from the cultures of the people they ruled in Southwest Asia? Plase help me with this question its confusing me so much!

*February 9, 2011*

**Physics - Please Help**

Two cars are moving. The first car has twice the mass of the second car but only half as much kinetic energy. When both cars increase their speed by 3.41 m/s, they then have the same kinetic energy. a) What is the original speed of the first car? b)What is the original speed ...

*February 8, 2011*

**pre-algebra**

If I have Y=-3X+21 do i simplify or keep it just the same???

*February 8, 2011*

**pre-algebra**

If I have Y=-3X+21 do i simplify or keep it just the same???

*February 8, 2011*

**Physics - Please Help**

Two cars are moving. The first car has twice the mass of the second car but only half as much kinetic energy. When both cars increase their speed by 3.41 m/s, they then have the same kinetic energy. a) What is the original speed of the first car? b)What is the original speed ...

*February 8, 2011*

**Physics**

Two cars are moving. The first car has twice the mass of the second car but only half as much kinetic energy. When both cars increase their speed by 3.41 m/s, they then have the same kinetic energy. a) What is the original speed of the first car? b)What is the original speed ...

*February 8, 2011*

**Chemistry**

Calculate the amount of Citric acid monohydrate needed to make 100 mL of 0.1 M solution

*February 7, 2011*

**physics**

a worker drives a .551 kg spike into a rail tie with a 2.55 kg sledgehammer. The hammer hits the spke with a speed of 62.1 m/s. if one fourth of the hammers kinetic energy is converted to the internal energy of the hammer and soike, how much does the total internal energy ...

*February 7, 2011*

**chemistry**

How many photons of light are emitted when the electrons in 10 hydrogen atoms drop from energy level 5 to 3?

*February 5, 2011*

**SraJMcGin**

Thanks so much SraJMcGin for all those notes, even my teacher didn't provide us with such good notes like you did:) Thanks so much:)<3<3<3<3<3<3<3 Where do I check the related questions?

*February 3, 2011*

**SraJMcGin**

SraJMcGin. I have a few questions; a few things that I don't really get.. I have trouble remembering the endings of the er, ir, and re verbs. Regular verbs mean that they don't have to be changed(they stay in the same form), its just their endings that change, the ...

*February 3, 2011*

**physics**

One strategy in a snowball fight is to throw a snowball at a high angle over level ground. While your opponent is watching this first snowball, you throw a second snowball at a low angle and time it to arrive at the same time as the first. The acceleration of gravity is 9.8 m/...

*February 3, 2011*

**French**

use 2 verbs together with the second in the infinite form. I don't get this...what to do?

*February 2, 2011*

**French**

Ask a question using Qui, Qui a la, Quelle, Quand, etc. 1.Quand tu vas a la cafe? 2.Qui vas aller a lècole? 3.Quelle heure est-il? Have I got all of them?

*February 2, 2011*

**French**

Use different adjectives correctly and demonstrate understanding of gender and number changes -2 BANGS examples/2 Non-Bangs examples. B-Beauty(Belle, Beau) A-Age(Jeune, Vieux) N-Number(Nouveau, Nouvelle) G-Gender(Bon, Mauvais) S-Size(Petit, Grande) Im not really sure of what ...

*February 2, 2011*

**French**

Wow thanks Grace so much:)

*February 2, 2011*

**French**

Difference between indefinite and definite articles? Indefinite = Un, Une, Des Defenite = La, Le, Les The indefinite articles means A or A(n) and Des means some. Le, and La mean the, and Les is the plural form of these two. Give example of each: 1.Je vais manger des fromage.(...

*February 2, 2011*

**Statistics**

Juan makes a measurement in a chemistry laboratory and records the result in his lab report. The standard deviation of students' lab measurements is 10 milligrams. Juan repeats the measurement 3 times and records the mean (x-bar) of his 3 measurements. a) What is the ...

*February 1, 2011*

**math**

ragan takes an hour to plant 2 vines between each of the 6 posts in the first row of his vineyard how long will it take to plant two vines between each of the 9 posts in the longer second row hint 10 vines take one hour

*February 1, 2011*

**math**

i have 3 kg 4 kg and 5 kg on one side and 5 kg and 7 kg on the other side which two tiles do i swap to have the same amount on both sides

*February 1, 2011*

**math**

i have 3 kg 4 kg and 5 kg on one side and 5 kg and 7 kg on the other side which two tiles do i swap to have the same amount on both sides

*February 1, 2011*

**math**

how do you add 3 1/2 + 1 3/4

*January 31, 2011*

**Physics**

The air speed indicator of a plane that took off from Detroit reads 373 km/h and the compass indicates that it is heading due east to Boston. A steady wind is blowing due north at 42.3 km/h. Calculate the speed of the plane with reference to the ground. If the pilot wishes to ...

*January 30, 2011*

**Physics**

For a science fair competition, a group of High School students built a kicker-machine that can launch a golf ball from the origin with a velocity of 12.3 m/s and initial angle of 29.9° with respect to the horizontal. *Where will the golf ball fall back to the ground? *How...

*January 30, 2011*

**Physics**

A golf ball is hit with an initial angle of 54.7o with respect to the horizontal and an initial velocity of 85.1 mph. It lands a distance of 104.3 m away from where it was hit. By how much did the effects of wind resistance, spin, and so forth reduce the range of the golf ball...

*January 30, 2011*

**math**

hey, this is my first time using this site so I'm not sure what I'm doing exactly! So i need a REALLY simple way how to convert fractions into a percent! i be confused!! :(

*January 27, 2011*

**Photography**

Suppose you have three negatives: an over-exposed one, an under exposed one, and a correctly exposed one. Which would require the longest exposure during contact printing?

*January 27, 2011*

**Geometry**

Jason designed an arch made of wrought iron for the top of a mall entrance. The 11 segments between the two concentric circles are each 1.25 m long. Find the total length of wrought iron used to make the structure. Round the answer to the nearest meter. Show your work.

*January 26, 2011*

**Math**

Lois invests $650 every 6 months at 4.6%/a compounded semi-annually for 25 years. How much interest will she earn after the 25th year?

*January 26, 2011*

**Math**

I did it, im just making sure my answer is right

*January 26, 2011*

**Math**

On July 1, 1996, Anna invested $2000 in an account that earned 6%/a compounded monthly. On July 1, 2001, she moved the total amount to a new account that paid 8%/a compounded quarterly. Determine the balance in her new account on January 1, 2008.

*January 26, 2011*

**math**

On July 1, 1996, Anna invested $2000 in an account that earned 6%/a compounded monthly. On July 1, 2001, she moved the total amount to a new account that paid 8%/a compounded quarterly. Determine the balance in her new account on January 1, 2008.

*January 26, 2011*

**Math**

Cliff has some money he wants to invest for his retirement. He is offered two options: 10%/a simple interest or 5%/a compounded annually. Under what conditions should he choose the first option

*January 26, 2011*

**Math**

Q: Determine the sum of the first seven terms of a geometric series in which the first term is 11 and the seventh term is 704. ^Are there two answers, since the common ratio could be positive or negative?

*January 25, 2011*

**math**

in 5 years art will be twice as old as ben. 5 years ago art was 3 times as old as ben. How old are they?

*January 24, 2011*

**Math**

The revenue for a business is modeled by the function R(x)=-2.8(x-10)^2+15, where x is the number of items sold, in thousands, and R(x) is the revenue in thousands of dollars. Express the number sold in terms of the revenue.

*January 22, 2011*

**Math**

Determine the domain and range of f(x)=-sqrt(x+3) and the equation of the inverse.

*January 22, 2011*

**Math**

Simplfy 7sqrt(3/6)

*January 22, 2011*

**Pre Calc**

A swimming pool can be filled by a vent in 10 hours. When the pool is filled, it can be emptied bya drain pipe in 20 hours. The pool manager mistakenly leaves the drain pipe open while trying tofill the pool. How long will it take to fill the pool?

*January 21, 2011*

**physics**

Find the coefficient of kinetic friction between a 4.3-kg block and the horizontal surface on which it rests if an 80 Newton/meter spring must be stretched by 2.7 cm to pull the block with constant speed. Assume the spring pulls in a direction 13 degree above the horizontal.

*January 19, 2011*

**Math**

40 + 24 = 64

*January 19, 2011*

**physics**

thank you! may God bless you Bob :)

*January 19, 2011*

**physics**

My bad. Find the coefficient of kinetic friction between a 4.3-kg block and the horizontal surface on which it rests if an 80 N/m spring must be stretched by 2.7 cm to pull the block with constant speed. Assume the spring pulls in a direction 13 degree above the horizontal.

*January 19, 2011*

**physics**

Find the coefficient of kinetic friction between a 4.3- block and the horizontal surface on which it rests if an 80 spring must be stretched by 2.7 to pull the block with constant speed. Assume the spring pulls in a direction 13 above the horizontal.

*January 19, 2011*

**Algebra 2**

Complete the square to solve -x^2-7x+6=-2x^2

*January 17, 2011*

**MATH**

Solve for y in the following system of equations: x - y = -1 3x + 5y = 21

*January 13, 2011*

**Math**

if log(x+1) 27=3 find the value of x *(x+1) is the base i know that the answer is 2 but i have no clue how to get that

*January 13, 2011*

**Statistics**

"Buy a Match 6 lottery ticket every day until you win the lottery. (In a Match 6 lottery, a player chooses 6 different numbers from the set {1, 2, 3, ..., 44}. A lottery representative draws 6 different numbers from this set. To win, the player must match all 6 numbers, ...

*January 13, 2011*