Saturday

August 2, 2014

August 2, 2014

Total # Posts: 301

**chemisrty**

A 50.0 mL solution of 1.2 M HCl at 24.1C is mixed with 50.0 mL of 1.3 M NaOH, also at 24.1C, in a coffee-cup calorimeter. After the reaction occurs, the temperature of the resulting mixture is 29.8C. The density of the final solution is 1.05 g/mL. Calculate the molar heat of n...

**Algebra**

The ratio of the lengths of strings that play the guitar notes D and B is 27 to 16. If a string 64 cm long plays a B, what is the length of the string that plays a D?

**Introductory Algebra**

My teacher is 67 years old.

**calculus**

An electron, travelling at 2000 m/s, is suddenly influenced by an extreme deceleration of 3000 m/s2. How fast is it going 0.03 s later?

**algebra**

m+3(m-4)=16 2z-4(9-3z)=62 2b+8/5=-12

**math**

-n+8n=35 4x-7-7x=-1 -22+3k+6=-28 -2(m+7)=-22 m+3(m-4)=16 2z-4(9-3z)=62 2b+8/5=-12 g+4/7=6 9-3h/5=-6 4m-16/12=-3

**science HELP ASAP!!!!!!!**

Please I need those answers tooo!!!

**math**

-3h=9(2-3h) 5(t+7)=2(s+9) 6(s+4)=3(s+9) 2(p+2)=1.8-2-0.2(p+5)

**math**

30-2s=4s 13q-48=-3q 5z-43=2z+80 8f+11=-7f-19 9b-10=-b-18

**math**

-(6-c)+3(2c-7)=1

**math**

solve the equation -n+8n=35

**math**

doug earned $40 from weekend job. he spent 1/4 of it on cd and 1/5 on movie ticket. how much money does he have left?

**trig**

A computerized spin balance machine rotates a 35-inch-diameter tire at 400 revolutions per minute. (a) Find the road speed (in miles per hour) at which the tire is being balanced. (Round your answer to two decimal places.) (b) At what rate should the spin balance machine be se...

**math**

what is the lcd of 1/2 and 2/3

**math**

what is the least common multiple of 8,10

**Psychology**

The voltage at a receptor site has just changed from -70 millivolts to -75 millivolts as a result of an _______ and will ________. a). inhibitory postsynaptic potential;increase the likelihood of an action potential. b). excitatory postsynaptic potential;decrease the likelihoo...

**Statistics**

No typo, that is how the question reads. Can you check my answers? 1. 0.54 2. 0.52 3. 0.140608 4. 0.405224 5. 0.4746

**Statistics**

Ricardo's car rental offers five different types of vehicles, compact cars (CC), midsize cars (MC), sport utility vehicles (SUV), vans (V), and luxury cars (L). Historically, if a random individual comes to rent a vehicle, the following probabilities apply: P(CC) = 0.16 P(...

**math**

a cookie recipe calls for 2 1/4 cups of flour.the yield of the recipe is two dozen cookies.how much flour goes into each cookie?

**math**

What is the scenario for the question the capacity of a beaker is 150 m.l.. how many beakers can be filled from a 4 L container?

**beginning algebra**

the rays won 33 fewer games than twice as many games as they lost. the total games played was 162. how many wins and how many losses did they have?

**english**

Im doing a 8 paragraph project report on cherokee indians, i need a introduction, final draft, six body paragraphs and a conclusion for a total 8 paragraphs please help me it due the 12

**Math**

Binary: 1cm,2cm,4cm,8cm,16cm 1. 1 2. 2 3. 1+2 4. 4 5. 5+1 6. 4+2 7. 4+3+1 8. 8 9. 8+1 10. 8+2 11. 8+2+1 12. 8+4 anyways you get it

**Chemistry**

....question. what is the concentration of the sulfuric acid? Are we to assume that this is pure sulfuric acid, no water?

**math**

customers in 14 years = 51,200 (1-0.038)^14 Did they give you a formula for this?

**math**

same thing as the other one i answered the general case is: new value = (old value)X(1+/-percent change)^years remember that 1% = 0.01 in the above formuala, and that it's negative if it's "decreasing/depreciating" and positive if it's growing.

**english **

Book: Information you’ll need to cite a book Example- Powell, Kevin, ed. Step into a World: A Global Anthology of the New Black Literature. 2nd ed. New York: Wiley, 2000. 1. Author(s) or Editor(s)- last name, first name, middle is any, followed by a period 2. Title of boo...

**chemistry**

9 times the MW of C plus 8 times the MW of H plus 4 times the MW of O. Add it all up

**Clinical Chemistry**

Thank you... Any ideas on ISE vs. flame photometry? I was thinking that maybe flame photometry comes out consistently slightly lower because it is hard to standardize? I mean, its hard to get the exact temperature of the flame to be precise (and accurate)?

**Clinical Chemistry**

I have 2 questions relating to clinical chemistry... 1st: I have no idea where to even start with this. It seems like it should be simple, but I have no clue. The question is... "In serum, about 55% of total serum calcium is bound. The measurement of ionized (free) calciu...

**Clinical Chemistry**

My guess is that since 55% is bound, that means 45% is free. So... make a ratio and solve for x .45/1.10mM = .55/x Whatever x equals, add it to 1.10mM since we are looking for the total calcium in serum. What do you think?

**Clinical Chemistry**

BLD 414?

**Algebra**

I'm having trouble finishing evaluating the expression b+1/6=-1/3

**chemistry**

idk

**Math**

two cards are drawn from a deck of cards. Once a card is drawn, it is not replaced. Find the probability of drawing a queen followed by a king.

**Social Studies**

What us a Political Cliff? I am supposed to write a summary about the subject.

**Help **

Any tips on how to get excellent grades? :) please reply fast

**burnhan **

Explain how you would use a number line to round 148 to the nearest ten

**math**

Y=4x-3

**chemistry**

how many electrons flow through a wire in 83.9 seconds if the current was 0.32 amps? ( an ampere is a coulomb/sec)and the charge on an electron is 1.602×

**chemistry**

A nitrogen atom has 7 protons, and its most common isotope has 7 neutrons. A radioactive isotope of nitrogen has 9 neutrons. What is the atomic number and what is the mass number of this radioactive nitrogen? Show all of your work for full credit

**Social Studies**

Does anyone have any information about Sulawesi artifacts? I am having trouble finding facts about an ancient ceremonial mahogany grass bowl. Thanks.

**statistics**

a sales manager wants to know whether a special promotional campaign is a success. he had the following data-Retail outlets :1 2 3 4 5 6 ; Sales before campaign : 50 48 31 42 28 53 ; Sales after campaign : 56 55 30 45 29 58. Test at 5% LOS.

**Statistics**

Having problems reading the z-table. I don't understand how .1500% equates to a 1.04 z-score Thank you for your help

**Chemistry **

What physical properties will the ionic compound CaSO4 be expected to have?

**Chemistry **

Which group of elements is most likely to not form ions?

**social studies 7th**

Who introduced them into Italy by Etruscan nobile

**platonic solids**

what is formula for deciding size of pentagons to make a 9" tall (12", 16" tall, etc.) dodocahedron?

**chemistry**

A gas is compressed from an initial volume of 5.60 L to a final volume of 1.22 L by an external pressure of 1.00 atm. During the compression the gas releases 128 J of heat. What is the change in internal energy of the gas?

**chemistry**

a 256 mL sample of an unknown gas was collected over water at 23 degrre celsius and 750 mmHg. the gas has a mass of 0.80 grams. what is the molar mass of the gas? (the vapor pressure of water at 23 degree celsius is 21.0 mmHg)

**math**

. Which is the next term in the number pattern: 77, 64, 53, 44, 37

**history**

Well, this is an idea of a thesis statement.. The presence of the urban classes prevents revolutions from becoming homogeneous movements. This is because each class (or individual) fight for their own material interests.

**history**

I need an opinion regarding this thesis statement. Urban areas had always served as the logical epicentre for organized opposition against the establishment. However, due to the presence of urban classes trying to fight for their own material interests, rebellions and revoluti...

**math**

Given 9 yards of fabric how many whole costumes could be made if each costume uses 1 3/7 yards of fabric

**Math**

Adult tickets=x Child tickets=88-x 8x + 5(88-x)=614 8x + 440-5x=614 3x=614-440 3x=174 x=58 Adult=58 child=30

**Chemistry**

What type of bond is formed when two or more non metals bond with each other? and What type of bond is formed when a metal and non metal bond with each other?

**Intro to Networking**

While working with networks, does a larger number of hops have a effect on the delay of packets?

**Music**

What are good tips on how to write good lyrics to a song?

**Music**

What are good tips on how to write good lyrics to a song?

**sciencee**

who started bing

**technology**

help me please

**tachnology**

who started twitter

**Foods Culture**

crickets with rice

**social studies**

answer this

**social studies**

who created independence day

**Geography**

Where do rivers begin or have their source?

**algebra**

I believe the answer is yes (assuming I read the question correctly). For example: 3*(4+5) = 3*(9) = 27 or 3*(4+5) = 3*(4)+3*(5) = 12+15 = 27

**math **

I think you need to provide the correct formulae for this one. I would link to some useful info, but this site doesn't allow linking.

**GCC**

I need to summerize a research paper that is mainly made up of quotes. How do I summerize it when is consist of quoting a quote. How do I structure my paper when the person that wrote the paper has so many quote. I hope this makes sense? Is there a way to summerize a quote tha...

**word problem**

The sum of the digits of 36 is 9. You are looking for a number that is between 36 and 45 and whose digits add up to 9. You could just run through the possibilities. 37 -> 10 38 -> 11 39 -> 12 40 -> 4 41 -> 5 42 -> 6 43 -> 7 44 -> 8 45 -> 9 There you ...

**math**

What are we dividing? 41 is a prime number, so factoring will be difficult.

**6th grade math**

I'm assuming you are not using zero or negative numbers as components. So then you have to think of all the combinations of 3 of the 9 single number digits, where 1 can only be used once. For example: 1*2*2 1*2*3 1*2*4 1*2*5 1*2*6 1*2*7 1*2*8 1*2*9 There's 8 possibilit...

**6th grade math**

To clarify, are you saying that the have to be composed of three single digit numbers? Also, if one number has more than one acceptable composition, is it counted once of multiple times towards the 50? For example, 24 could be 2*3*4 or it could be 8*3*1; does that count as 1 o...

**science**

You need the kinematic equations to solve this problem. Also, you can either calculate this assuming that the time it takes for the sound is negligible, or you can calculate it as two parts. If you calculate assuming the sound is instantaneous: V(initial)=0m/s V(final)=doesn&#...

**Logic**

an average for the individuals that make up that average

**Math**

A shoebox holds 140 baseball cards. If John has 11 packages of 8 cards, how many more packages of cards does John need to buy to fill the shoebox?

**Math**

A shoebox holds 140 baseball cards. If John has 11 packages of 8 cards, how many more packages of cards does John need to buy to fill the shoebox?

**ipc**

Suppose all of the apples have a mass of 0.10 kg. If apple (A) is sitting on the ground, what is its potential energy?

**ENGLISH**

Which sentence uses the demonstratives correctly

**english**

In the morning, thousands of birds appeared.

**math**

Given the following sets, select the statement below that is NOT true. A = {b, l, a, z, e, r}, B = {b, a, l, e}, C = {a, b, l, e}, D = {l, a, b}, E = {a, b, l} a.) E ⊆ A b.) C ⊆ B c.) D ⊆ C d.) D ⊂ B e.) C ⊂ B

**math**

The cardinal number of the set {cat, dog, horse, fish, lizard, meerkat, rhinoceros, elephant, giraffe, platypus, hippopotamus, skunk, mouse, chipmunk, squirrel} is _________.

**math**

Without writing them all out, what is the number of subsets of set A ={king, queen, knight, prince, princess, duke}?

**math**

The cardinal number of the set {cat, dog, horse, fish, lizard, meerkat, rhinoceros, elephant, giraffe, platypus, hippopotamus, skunk, mouse, chipmunk, squirrel} is _________.

**Psychology**

Repeatedly reciting a sequence of words: A) activates different brain areas than when the word sequence is spoken the first time. B)is a characteristic symptom of the disorder known as Korsakoff’s syndrome. C)minimizes the effects of proactive interference. D) prevents tr...

**Psychology**

In this memory process, the individual records information to prepare it to be entered into memory. Storage Encoding Retrieval Priming i think the answer is encoding but then im confused?

**adding rational expressions**

8 + x-4/x+3

**adding rational expressions**

There are no parentheses! It's exactly as stated 2 over 5x plus 1 over 9 2/5x + 1/9

**adding rational expressions**

2/5x + 1/9

**school in general**

Hi i have a question im currently in 7th grade but i was held back a year in first do you think there would be any possible way to advance to 8th grade just curios I believe I have a wide enough knowledge span to pull it off but im just questioning the wheter or not it would b...

**U.S. History**

Why was separation of the races required on the transit system in Montgomery, Alabama during the 1950s?

**U.S. History**

Why was separation of the races required?

**algebra**

_____j - 4.5j =3.8j

**math**

(8+ )*m=5m

**Pre-algebra**

1,589

**Fizzicks**

How do you find the wavelength of a 68,000 Hz ultrasound wave in air?

**30-60-90 triangle**

thank you

**30-60-90 triangle**

The hypotenuse of a 30-60-90 triangle is 10. Find the perimeter. How do i do that?

**physics**

Green light has a wavelength of 4.96 10-7 m and travels through the air at a speed of 3.00 108 m/s. Calculate the period of green light waves with this wavelength. s What is the frequency? Hz

**english**

I don't understand the book I'm reading. Its called Goodnight Mr Tom. We writing exams on this but I really need help understanding this book. Please help me.