Saturday

October 10, 2015
Total # Posts: 85,777

**Chemistry **

Suppose the density of 100.0 mL of some liquid was found to be .78 g/mL . What would be the specific gravity of 25.0 mL of the liquid?
*September 30, 2015*

**Chemistry **

Mary was determining the density of a metal cylinder. When recording the diameter, she mistakenly recorded a number that was too small. Will her calculated value for density be too high or too low? Explain
*September 30, 2015*

**math for managers**

Cost analysis Te owner of a small construction busi-ness needs a new truck. He can buy a diesel truck for $38,000 and it will cost him $0.24 per mile to operate. He can buy a gas engine truck for $35,600 and it will cost him $0.30 per mile to operate. Find the number of miles ...
*September 30, 2015*

**Biology**

Synthesis means the process by which simple compounds are united to form more complex materials. Dehydration means loss of water. Explain why chemists refer to the joining of monosaccharide molecules to form disacchardies as dehydration synthesis reaction
*September 30, 2015*

**math**

I dont know
*September 30, 2015*

**math**

Kim has a balance of -20.59 in her account. Her bank requires a minimum balance of 40.00 How much does kim need to deposit in order to have a 40.00 balance
*September 30, 2015*

**Physics**

A "swing" ride at a carnival consists of chairs that are swung in a circle by 17.4 m cables attached to a vertical rotating pole, as the drawing shows. Suppose the total mass of a chair and its occupant is 291 kg. (a) Determine the tension in the cable attached to ...
*September 30, 2015*

**Multivariable calculus**

Find dy/dx x=te^t y=t+sint
*September 30, 2015*

**Physics**

In the design of a rapid transit system, it is necessary to balance the average speed of a train against the distance between station stops. The more stops there are, the slower the train's average speed. To get an idea of this problem, calculate the time it takes a train ...
*September 30, 2015*

**History**

summarize the differences and a way to understand the similarities between gnp and gdp and gni
*September 30, 2015*

**english**

a personal narrative is like an autobiography in that it
*September 30, 2015*

**Geometry**

Are all horizontal lines parallel Use slope to explain how you know I put yes
*September 30, 2015*

**physics**

in a slap shot,a hockey player accelerates the puck from a velocity of 5.5m/s to 36m/s. if the shot take 3.16*10^-2, find the distance
*September 30, 2015*

**physics**

Calculate the change in energy of an atom that emits a photon of wavelength 2.21 meters. (Planck’s constant is 6.626 x 10-34 joule seconds, the speed of light is 2.998 x 108 m/s)
*September 30, 2015*

**math**

abel,belle and cindy have $408. belle has 7$ more than cindy and $5 more than abel, how much does abel have?
*September 30, 2015*

**Math Answer Check**

For #4, why did you take the square root of 3720 when r^2 = 3721?
*September 30, 2015*

**Math Answer Check**

1. cos^-1((-sqrt3)/2) 5pi/6 2. arccos(cos7pi/2) -pi/2 3. sin^-1(sin7pi/4) -pi/4 4. csc(arctan11/60) 61/11
*September 30, 2015*

**Advanced function**

Thank you:)
*September 30, 2015*

**english**

you, should bring
*September 30, 2015*

**english**

Select the letter of the answer that correctly identifies the subject and complete verb in each sentence. You should bring a change of clothes to the beach a. you, bring b. you, should bring c. clothes, bring
*September 30, 2015*

**math **

so if a car goes east 30mph and th other car was going 60mph south for one hour how far will they be from each other
*September 30, 2015*

**english**

No, they have not been defined.
*September 30, 2015*

**english**

true or false 1.The "bottoms up" proofreading technique involves reading a paper one sentence at a time, from the beginning to the end. 2.Writers who make many mistakes should concentrate finding the worst errors.
*September 30, 2015*

**mathematics**

i am greater than a hundred. if you divide me by 25,you will get 5.
*September 30, 2015*

**Algebra II**

Thank you for the explanation Steve! I understand why I was confused and get the problem now. Again, thanks!
*September 29, 2015*

**Algebra II**

By the way, I've gotten to x^20 = x^a, but don't know what to do from here.
*September 29, 2015*

**Algebra II**

Hey all. I'm trying to solve this question, but don't really understand how to do it: If (x^4)^5 = x^a for all values of 'x', what is the value of 'a'? Any help is much appreciated, thanks!
*September 29, 2015*

**Math**

What is a counters to show a group that is greater
*September 29, 2015*

**Chemistry (check)**

Are the following names correct? CN- cyanide ion H2O dihydrogen monoxide ClO2 chlorite ClO4- perchlorate N2O dinitrogen monoxide GeF4 germanium tetrafluoride SO32- sulfite IF3 iodine trifluoride PO33- phosphite NH3 nitrogen dihydrogen ICl3 iodine trichloride SF4 sulfur ...
*September 29, 2015*

**math**

Jim's backyard is a rectangle that is 15 5/6 yards long and 10 2/5 yards wide. jim buys sod in pieces that are 1 1/3 yards wide. How many pieces of sod will Jim need to buy to cover his backyard with sod?
*September 29, 2015*

**what is the defination and example of ethics and m**

what comes to mind when you think of ethic or morality what is a example of a ethical belief and explain the the reason.
*September 29, 2015*

**Calculus 1**

f'(x) = 2x +2y + 2xdy/dx - 2ydy/dx + 1 = 0 2xdy/dx - 2ydy/dx = -2x - 2y -1 dy/dx = (-2x - 2y - 1)/ (2x - 2y) the tangent passes through (2,4) m = dy/dx = (-2(2) - 2(4) -1 ) ------------------ (2(2) - 2(4)) m = 13/4 the equation of the tangent line through (2,4); y = mx + c...
*September 29, 2015*

**maths**

compound interest, A = p (1 + (r/n) )^(nt) where p=pricipal, r=rate, n=number of compounding periods t=years A = 12800 ( 1 + (0.075/2))^2 A = 13778
*September 29, 2015*

**maths**

amount =14792 ci=1992
*September 29, 2015*

**Algebra**

How did you get 2/8's
*September 29, 2015*

**Algebra**

1\8(3d-2)=1/4(d+5)
*September 29, 2015*

**Chemistry**

TiCl4+2H2O=TiO2+4HCl
*September 29, 2015*

**Chemistry**

30g of TiCl4 is mixed with 18g of water to from TiO2 and HCl. Write the chemical reaction and balance it.How much TiO2 is produced. my answer: TiCl4+2H2O= TiO2+4HCl
*September 29, 2015*

**math help**

3x^2-6x-9 State the coordinates of the x-intercepts show work.
*September 29, 2015*

**General Chemistry**

An experiment calls for you to use 100 mL of 0.65 M HNO3 solution. All you have available is a bottle of 2.7 M HNO3. How many milliliters of the 2.7 M HNO3 solution do you need to prepare the desired solution?
*September 29, 2015*

**LA**

They are both used to look up things, and they are both sturdy resources to use. A dictionary is used to look up a definition, but a thesaurus is used to find the synonyms and the antonyms of a word
*September 29, 2015*

**english**

Concise language
*September 29, 2015*

**english**

thank you
*September 29, 2015*

**english**

concise language
*September 29, 2015*

**english**

consistency
*September 29, 2015*

**english**

Soap has existed since ancient times long ago? a. consistency b. parallelism c. concise language
*September 29, 2015*

**english**

No sir
*September 29, 2015*

**english**

which sentence is the best revision? a. My niece is a ballet dancer. b. My niece is a ballet dancer who performs both solo ballets and as a member of the ballet corps. c. My niece is a ballet dancer and I always enjoy attending performances.
*September 29, 2015*

**Calculus**

Find the antiderivatives. 1. f(x)= x sin (x^2) 2. f(x)= x sin x
*September 29, 2015*

**Indices**

Why am i using numbers 3and2. R is 8root2
*September 29, 2015*

**Indices**

The first one 4x2^3/2^3 =4
*September 29, 2015*

**Indices**

Acutally the second one as 4^3/2^4
*September 29, 2015*

**Indices**

Erm the first one?
*September 29, 2015*

**Indices**

P=(64)^-2 Q=1/16^(1/3) R=8root2 Express pqr as a power of 4 P=4^(-6) Q=4^(-2/3) R= ???????? How can i find R? *please show me the method for future reference* Thankyou
*September 29, 2015*

**physics**

draw the figure. right triangle, hypotenuse 10, opposite side 6. theta upstream=arcsin6/10
*September 29, 2015*

**Math**

the sum of the ages of rex, ben and alfred is 36 years, two years ago, ben was 3 times as old as rex was then, 8 years from now, alfred will be twice as old as ben will be then. find their present age.
*September 29, 2015*

**Science**

ayu
*September 28, 2015*

**Math**

5+2x=8
*September 28, 2015*

**Geometry**

Two lines are cut by a transversal such that a pair of alternate interior angles are right angles are the two lines parallel
*September 28, 2015*

**physics**

A block of mass M rests on a block of mass M1 = 5.00 kg which is on a tabletop. A light string passes over a frictionless peg and connects the blocks. The coefficient of kinetic friction mk at both surfaces equals 0.330. A force of 60.0 N pulls the upper block to the left and ...
*September 28, 2015*

**Writing**

I'm trying to make a list of the consequences of pollution. I know about public health and the environment. What else? Also, how can I relate pollution to politics?
*September 28, 2015*

**math**

Jeremy enlarged a picture.The length of the original picture is 8cm and the width is 5cm.The length of the enlarged picture is 10cm and the width is 7cm. A.What percent is the 10cm length of 8cm length? B.What is the area of each picture?By what percet is the area changed? Pls...
*September 28, 2015*

**Physics**

A small crack occurs at the base of a 13.5 m high dam. The effective crack area through which water leaves is 1.55 10-3 m2. (a) Ignoring viscous losses, what is the speed of water flowing through the crack?
*September 28, 2015*

**Physics**

A small crack occurs at the base of a 13.5 m high dam. The effective crack area through which water leaves is 1.55 10-3 m2. (a) Ignoring viscous losses, what is the speed of water flowing through the crack?
*September 28, 2015*

**Physics**

A small crack occurs at the base of a 13.5 m high dam. The effective crack area through which water leaves is 1.55 10-3 m2. (a) Ignoring viscous losses, what is the speed of water flowing through the crack?
*September 28, 2015*

**Chemistry**

1. Write 86,400 s in exponential notation. My answer: 8.6400 x 10^4 s 2. Write 0.15 ns using exponential notation with units of s. My answer: 0.15 x 10^-9 3. 141000 g =? kg My answer: 141 kg 4. Write 1.4 Mg using exponential notation with units of g. My answer: 1.4 x 10^6 g 5...
*September 28, 2015*

**pre-algebra**

-8-5y=12-9y
*September 28, 2015*

**Physics**

A 124-kg balloon carrying a 22-kg basket is descending with a constant downward velocity of 25.2 m/s A 1.0-kg stone is thrown from the basket with an initial velocity of 11.7 m/s perpendicular to the path of the descending balloon, as measured relative to a person at rest in ...
*September 28, 2015*

**Law**

What are five remedies to a Charter breach ?
*September 28, 2015*

**Honors Physics 1**

It would be her horizontal speed.. 4.26cos35.7 Honors Physics?
*September 28, 2015*

**math**

the area of a rhombus jointly as the length of the two diagonal.transform to the equation of variation?
*September 28, 2015*

**physics**

net North is zero. distance=12+19+12 displacement=19E
*September 28, 2015*

**math**

the square of the sum of two consecutive positive even integer is greater than the sum of their square by 48. Find two integers.
*September 28, 2015*

**Physics-Urgent**

A sign with a mass of 23 kg is hanging in two wires both making an angle of 27 degrees with the vertical. Find the tension in one of the wires. Give your answer in newtons (N) and with 3 significant figures.
*September 27, 2015*

**Chemistry **

100mls of propane gas in grams. Pressure is equal to one atmosphere
*September 27, 2015*

**Chemistry**

Look to see which ones are mirror images of that molecule, eliminate those possibililties, those are enantiomers, they will have opposite configurations. (2S, 3S) Diastereomers are non mirror images. So maybe it will have 2S 3R or 2R 3S configurations.
*September 27, 2015*

**Organic Chemistry**

They should be miscible as they are both polar. when doing these you must remember "like dissolves like" polar molecules dissolve polar molecules. nonpolar molecules dissolve nonpolar molecules.
*September 27, 2015*

**psychology**

Gavin, a seventh grader, has more trouble in school than many of his peers, particularly with word problems in math and other areas that aren't concrete and tangible. In spite of high motivation, he still struggles, and new situations and problems “throw him” ...
*September 27, 2015*

** PLEASE HELP**

The mixing of plants, animals, and microorganisms that occurred after Europeans arrived in the Americas is known as A. the Columbian Exchange. B. global interdependence. C. triangular trade. D. global mixing.
*September 27, 2015*

**French**

Also, is it okay to omit the day of the week and say just "le 16"?
*September 27, 2015*

**French**

Are they also pronounced the same way?
*September 27, 2015*

**French**

Are these sentences correct? Dimanche la semaine dernière, j'ai vu ma cousine. Dimanche 16, j'ai joué aux cartes.
*September 27, 2015*

**physics**

A quarterback takes the ball from the line of scrimmage, runs backwards for 9.0 yards, then runs sideways parallel to the line of scrimmage for 17.0 yards. At this point, he throws a 46.0-yard forward pass straight downfield, perpendicular to the line of scrimmage. What is the...
*September 27, 2015*

**public speaking**

sorry c
*September 27, 2015*

**public speaking**

d
*September 27, 2015*

**public speaking**

What type of visual aid is showing the actual thing being discussed? A. Photograph B. Graph C. Object D. Videotape
*September 27, 2015*

**Physics**

Two charges are placed on the x axis. One of the charges (q1 = +5.44C) is at x1 = +3.00 cm and the other (q2 = -27.7C) is at x2 = +9.00 cm. Find the net electric field (magnitude and direction given as a plus or minus sign) at (a) x = 0 cm and (b) x = +6.00 cm.
*September 27, 2015*

**Physics**

A uniform electric field exists everywhere in the x, y plane. This electric field has a magnitude of 5600 N/C and is directed in the positive x direction. A point charge -9.6 × 10-9 C is placed at the origin. Find the magnitude of the net electric field at (a) x = -0.20 ...
*September 27, 2015*

**Pre-Algebra**

194
*September 27, 2015*

**math**

An item is on sale at 40% off the regular price. It is taxed at a rate of 6%. If the final sale price including tax is $57.24, then what is the sale price of the item without tax? What was the regular price of the item? The sale price of the item without tax was $________. The...
*September 27, 2015*

**math**

The sum of the ages of Jose and Valerie is 78 years. 9 years ago, Jose's age was 3 times Valerie's age. How old is Jose now? (A) Translate the given information into an equation using the variable x = current age of Jose. Your equation should contain 78, 3, and 9. Do ...
*September 27, 2015*

**math**

Gregory is 2 years older than Esmeralda. In 5 years the sum of their ages will be 42. How old is Esmeralda now? (A) Translate the given information into an equation using the variable x = current age of Esmeralda. Simplify the left side of your equation. __________________= 42...
*September 27, 2015*

**math**

An item is on sale at 40% off the regular price. It is taxed at a rate of 6%. If the final sale price including tax is $57.24, then what is the sale price of the item without tax? What was the regular price of the item? The sale price of the item without tax was_______ $. The ...
*September 27, 2015*

**math**

The sum of the ages of Jose and Valerie is 78 years. 9 years ago, Jose's age was 3 times Valerie's age. How old is Jose now? (A) Translate the given information into an equation using the variable x = current age of Jose. Your equation should contain 78, 3, and 9. Do ...
*September 27, 2015*

**Economics**

None
*September 27, 2015*

**math**

Gregory is 2 years older than Esmeralda. In 5 years the sum of their ages will be 42. How old is Esmeralda now? (A) Translate the given information into an equation using the variable x = current age of Esmeralda. Simplify the left side of your equation. = 42 (B) How old is ...
*September 27, 2015*