Friday

April 18, 2014

April 18, 2014

Total # Posts: 123

**Chemistry**

what would be the molality of a solution if 71g of Cl2 were added to 400 mL of acetone (D=0.788 g/mL)

**math**

a box contains 22 coins consisting of quarters and dimes. the total value of the coins is $3.55. determine the number of quarters and the number of dimes in the box?

**Algebra**

Write the equation of the line in standard form: (-3, 6); m = 1/2 (1, 0) & (-5, 3) (-5, -5) & (-1, 3)

**Math**

Write an equation in slope-intercept form, point-slope, or standard form for the line with the given information. Explain why you chose the form you used. a. Passes through (-1, 4) and (-5, 2)

**us history**

I need a word that means.. a governments position on an issue

**Math**

Find two numbers the exact answer is between 6x7,381

**Chemistry**

If 10.11 g of limestone decomposes by heat to give 8.51 g of solid calcium oxide and carbon dioxide gas, what is the mass of carbon dioxide produced?

**College Algebra**

I have no idea how to do this, and nobody in my family knows how to either. I have to determine the domain of the following function. f(x)=5/(3x-7)

**Government**

The first American voters were only white, male ---------s. What is the blank word?

**Government**

People who believe voting is important have high political ----c-c-. What's the missing word? Thanks.

**US Government **

Any person currently in --i- cannot vote. What is the blank word? Thanks.

**chemistry**

How many grams of ammonium fluoride are required to neutralize 972 'm of 0.00327 M sulfuric acid

**Mathmatics**

this is caleb and never mind this question

**Physics**

A 2563-kg van runs into the back of a 826-kg compact car at rest. They move off together at 8.5 m/s. Assuming the friction with the road is negligible, calculate the initial speed of the van.

**Physics**

You need to move a 128-kg sofa to a different location in the room. It takes a force of 99 N to start it moving. What is the coefficient of static friction between the sofa and the carpet?

**Basic Phsyics**

A projectile is fired such that the vertical component of its velocity is 49 m/s. The horizontal component of its velocity is 60 m/s. a) how long does the projectile remain in the air? b) what horizontal distance does it travel?

**Basic Physics**

A baseball is hit 1.3 m above home plate. The bat sends it off at an angle of 30 degrees above the horizontal at a speed of 45.0 m/s. The outfield fence is 100 m away and 11.3 m high. Does the ball clear the fence?

**Basic Physics**

While standing on an open bed of a truck moving at 35 m/s, and archer sees a duck flying directly overhead. The archer shoots an arrow at the duck and misses. The arrow leaves the bow with a vertical velocity of 98 m/s. a) how long does it remain in the air b) the truck mainta...

**Basic Physics**

2.0 s

**Basic Physics**

A shoe flung into the air such that at the end of 2.0 m/s it is at its maximum height moving at 6.0 m/s. How far away will it be from the thrower when it returns to the launch altitude.

**Physics**

Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. (a) Calculate the speed of a 94-kg per...

**Spelling 4th grade**

Down is to dive as up is to ____________?

**Physics**

You are driving a 2570.0-kg car at a constant speed of 14.0 m/s along a wet, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides to a halt in a d...

**Physics**

A 225-kg crate is pushed horizontally with a force of 690 N. If the coefficient of friction is 0.20, calculate the acceleration of the crate.

**Physics**

You are driving a 2570.0-kg car at a constant speed of 14.0 m/s along a wet, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides to a halt in a d...

**Physics**

A 1.31-kg block slides across a rough surface such that it slows down with an acceleration of 1.39 m/s2. What is the coefficient of kinetic friction between the block and the surface?

**Physics**

You are driving a 2570.0-kg car at a constant speed of 14.0 m/s along a wet, but straight, level road. As you approach an intersection, the traffic light turns red. You slam on the brakes. The car's wheels lock, the tires begin skidding, and the car slides to a halt in a d...

**Math**

There will be 24 people all together at george's birthday party.He wants to serve his grandmother's special fruit punch. His grandmother lives in England, where they use metric measurements in cooking. This is her recipe. Grandmothers fruit punch - serves 10 400 ml pin...

**Math**

One day we decidid to drive from town A to town D.In order to get there,we had to drive through town B and C.It is ten miles farther from town A to town B than it is from town B to town C.It is ten miles farther from town B to town C than it is from town C to town D. It is 330...

**Math (kindergarten)**

go to the right.8+1=9 go to the left.1+2=3 it is 39.

**Pre-Algebra 7th grade.**

I have prealgebra with order of operations with a line dividor with a fraction line/divider. It says: 94-6 ____ 66(divided by) 6

**Algr.1**

For Nina's illness her doctor gives her a prescription for 28 pills. The doctor says that she should take 4 pills the first day and then 2 pills each day until her prescription runs ... How many pills should she take at the end of the 2nd day? ... So how many days will it ...

**Physics**

Every glass window pane has two surfaces that reflect some light as it passes through; why doesn't interference effects show up routinely in every house window? If you could explain this I'd really appreciate it.

**Physics**

If the two protons and the are all at rest after the collision, find the initial speed of the protons.

**physics**

An R-C circuit is driven by an alternating voltage of amplitude 110 and frequency . Define to be the amplitude of the voltage across the capacitor. The resistance of the resistor is 1000 , and the capacitance of the capacitor is 1.00 . I need help on what to do I'm lost th...

**Ground School**

What is the best way for me to learn more about airport operations??

**calculus**

Find the equation of the line given that f(x)=10^x and the point A is at x=log10(5).

**American Sign Language**

I need help for how to sign my 2 sentences in ASL. can you please help me? here are my 2 sentences: 1. I have been noticing that on bus or trolley young people are not courteous to give up her/ his seat to older people. 2. I had an idle chichat with my aunt about politics I wa...

**calculus**

use differentials to estimate ln(e^4 +1) - ln(e^4)

**Math (Calculus)**

Find the derivative of (ln(tan(x))/3pi

**Math**

is 0.9 greater than 0.789

**math **

explain how you can find the sum 25 + 59 without paper, pencil or calculator. Find the sum? How do I do this

**pre calc**

find the exact solution algebraically and check it by substituting into the orginal equation. 1. 36(1/3)^x/5=4 2. 32(1/4)^x/3=2

**math**

i have a HUGE math test tomorrow, And I need some help on Factoring. Any websites that will give me good tutorials? I've found some but its total bs.

**Math**

-2/9 x 2 1/4

**science**

what was an example of a vessel that came to the surface by a ships signal

**math**

set out in tens and ones 32 + 10 = 43 + 54 = 28 + 61 = 15 + 73 =

**algebral**

how to write an algebrale equation to model situation te number of gal of water used to water trees is 30 times the number of trees

**Pre Algebra**

I need help figuring out simple interest and the balance of an account. Example P = $525, r = 6%, t + 9 years

**Pre Algebra**

I need help figuring out simple interest and the balance of an account. Example P = $525, r = 6%, t + 9 years

**chem**

I apologize but in the original data at the top of my answer the heat capacity should read: (4.184 joules / (gram x degree celsius))

**chem**

137 x 10^7 km^3 1.03 g / cm^3 4.184 g / cm^3 We need to convert the volume of the oceans to cm^3 so density (g/cm^3 is in the same units. 1 km = 1000 meters 1 meter = 39.37 inches 1 inch = 2.54 cm 1 km x (1000 meters / 1km) = 1000 meters 1000 meters x (39.37inches / 1 meter) =...

**Calculus**

Use implicit differentiation to find an equation of the tangent line to the curve y^2 = x^3 (26 − x) at the point (1, 5).

**Calculus**

Use implicit differentiation to find an equation of the tangent line to the curve y^2 = x^3 (26 − x) at the point (1, 5).

**8th grade**

How do you calculate the slope of a line?

**8th grade**

How do you calculate displacement and distance and velocity? (science)

**social studies**

what is the definition of values

**Physics**

A soccer player launches a ball at an angle of 40 degrees, with an initial velocity of 23 m/s. What are the horizantal and vertical for this problem??

**Math**

thank you!

**Math**

another question to see if i am right. when im rounded to the nearest ten, im 80. the digit in my tens place is 5 more than the digit in my ones' place. who am i? it is 83. correct?

**Math**

it is 57.

**Math**

could be 62 ?

**Math**

60 ?

**Math**

When I'm rounded to the nearest ten, I'm 60. The digit in my ones' place is 2 more than the digit in my tens' place. Who am I?

**social studies**

what aresome landforms in the southwest region

**Physics**

A physics student sits by the open window on a train moving at 25 m/sec towards the east. Her boyfriend is standing on the station platform, sadly watching her leave. When the train is 150 meters form the station, it emits a whistle at a frequency of 3000 Hz. What is the frequ...

**Physics**

any one??

**Physics**

A physics student sits by the open window on a train moving at 25 m/sec towards the east. Her boyfriend is standing on the station platform, sadly watching her leave. When the train is 150 meters form the station, it emits a whistle at a frequency of 3000 Hz. What is the frequ...

**physics**

ok figured out intensity need help with other 4

**physics**

An electronic point source emits sound isotropically at a frequency of 3000 Hz and a power of 34 watts. A small microphone has an area of 0.75 cm2 and is located 158 meters from the point source. a) What is the sound intensity at the microphone ? To find intensity i tried I=Po...

**Calculus**

Find the volume, V , of the solid obtained by rotating the region bounded by the graphs of x = y2, x = squareroot(y) about the line x = −1.

**science**

Expain why,it is easier to break an egg by stricking at the flat side, other than at the pointed edges.

**algebra**

Trying to figure out my sons math. been way to long!!!! The question is find the slope for y = 3

**algebra**

find the slope for 2x - 3y = 6

**Pre-Algebra**

well wut do they call them

**math**

Rational expressions in lowest terms 4y ------------ 2xy + 4y

**college**

4y/2xy+4y rational expressions HELP!!! I need to express this in the lowest form.

**4th grade Vocabulary**

Cell phone

**social studies**

What is the Green Treaty Line?

**Chemistry**

According to the principle of electrical neutrality, a water sample must have the same number of anions and cations. Assuming that a water sample contains 40 mg/L of chloride, 100 mg/L sulfate, and 10 mg/L nitrate, estimate the maximum amount (in mg/L) of sodium that could be ...

**6th grade**

I have to find the area of a circle. It says to round to the nearest unit, but I'm confused about what unit it is talking about. Any thoughts?

**Biology**

describe the effect of cyanide and arsenic on cellular repiration. Include the effect of these poisons on the electron transport chain. Be specific, and diagrams can be used to elucidate the process.

**Algebra**

I am supposed to find the equation for the boundary lines, using the points 0,4 and 3,5. I got 5-4/3-0, which plugged into y=mx+b would equal y=1/3x+b. The book says b equals four, but where does this number come from? Thanks!

**Algebra**

I am doing the amount of permutations in the word trigonometry. For the expression, I wrote 12!/2!2!2!. I got 968003200. Is this correct? If not, should I use parenthesese? Thanks

**Math**

A toy manufacturer is introducing two new dolls, My First Baby and My Real Baby. In one hour, the company can produce 8 First Babies or 20 Real Babies. Because of demand, the company produces at least twice as many First Babies as Real Babies. The company spends no more than 4...

**social studies**

Why does it rain more in western oregon than eastern oregon?

**8th grade**

i have to write a riddle about variables how am i supposed to do that with out ever writing a riddle before?

**algebra**

How would you solve this math equation? this is really confusing to me. Ms.Martin was researching the costs of financing $125,000 for a home. She found that the monthly payment for a 6.875% loan for 30 years would be $821.16 per month. She found that the monthly payment for a ...

**Organic Chemistry**

1,4-Diphenyl-1,3-butadiene was synthesied using cinnamaldehyde, K3PO4, and benzyltriphenylphosphonium chloride. In addition to cis,trans and trans,trans-1,4-Diphenyl-1,3-butadiene, there is another isomer of this compound that has not been shown. What is it and why was it not ...

**Organic Chemistry**

How do you name the products? 2-ethyl-1,3-hexanediol is oxidized. One option is that the primary alcohol is oxidized, but not the secondary. Another option, the secondary is oxidized but not the primary. Last option is that they are both oxidized. How do you name these products?

**Organic Chemistry**

Camphor has a C=O group but isoborneol does not. Just an OH group. I was thinking that it was the C=O absorption that was a result of some camphor not reacting and being left with the product.

**Organic Chemistry**

A sample of isoborneol prepared by reduction of camphor was analyzed by IR and showed a band at 1750 cm-1. This result was unexpected. Why?

**organic chemistry**

Why is it easier to remove excess acetic acid from isopentyl acetate than excess isopentyl alcohol? Sodium Bicarbonate is added but the question doesn't say anything about it.

**english**

I need an overview of the lion king that tells about the heroes journy such as his call to adventure, crossing the threshold, challenges, supreme test, and his return home. thanks

**chemistry**

thanks

**chemistry**

Using a BCA table, calculate the molarity of a 25.0 mL sample of HNO3 thats is titrated to its endpoint with 22.7 mL of 0.200 M NaOH.

**chemistry**

water molecules have a bent shape rather than a linear shape because

**chemistry**

the number of dorbitals in the second prinicipal energy level ?

**English Expression**

In America, it is customary to express gratitude by exchanging presents as well as cards.