Monday

July 28, 2014

July 28, 2014

Total # Posts: 224

**Chemistry Help!!**

a kilogram of aluminum metal and a kilogram of water are each warmed to 75 degree Celsius and placed in two identical insulated containers. one hour later, the two containers are opened and the temperature of each substance is measured. the aluminum has cooled to 35 degree Cel...

**Physics**

A 14,245N auto with a velocity of 6.0m/s crashes into a brick wall. If the car moves 64.0 cm before coming to a stop, what average force does the car exert on the wall?

**Physics**

A 14,245N auto with a velocity of 6.0m/s crashes into a brick wall. If the car moves 64.0 cm before coming to a stop, what average force does the car exert on the wall?

**math**

80.00

**chem: gases, liquids, solids**

How many kilojoules of heat is required to completely covert 60.0 grams of water at 32.0° C to steam at 100°C? For water: s = 4.179 J/g °C (delta)H fusion = 6.01 kJ/mol (delta)H vap = 40.7 kJ/mol

**Chemistry: gases, liquids, solids problem**

4 NH4NO3 -> 8 H2O + 4 N2 + 2 O2 What will be the total volume in liters of gas produced at 720. mm Hg and 570.0°C when 2.50 g of NH4NO3 completely decomposes? Use molar masses with at least as many significant figures as the data given.

**Chemistry**

thanks Liliana! and everyone else.

**science**

explain why a single5 500 kg block of granite weathers much more slowly than 100 chunks of granite weighing 5 kg each.

**chemistry**

A 3.0% by mass solution of H2O2 contains 3.0 g of H2O2 per 100 g of solution. (3.0 g H2O2 / 100 g solution) x (1.01 g solution / 1 mL solution) x (1000 mL / L) = 30.3 g H2O2 / L (30.3 g H2O2 / L) x (1 mole H2O2 / 34.01 g H2O2) = 0.8909 moles H2O2 / L = 0.89 M to 2 sig figs

**math**

_______7m______ |\ / | | \ 2.8m 2.8m / | | \ / | | n \ / | | / \ n | | / \ | | / \ | / 2.8m 2.8m \ | ____________ \ | Find the area of each shaded region( n not shaded). Assume that all angles that appear to be right angles are right angles.

**Math**

This irregular shape has 2m,2m,2m, 3m, 4m, 7m _2m_ _2m_ | |2m__3m_| | | | |________| 4 m 7 m how would I find the area if you can't tell how it is so you can't answer it I understand

**Math**

A= 10,560 ft x 2 mi

**Math**

Find the measures of two supplementary angles if the difference of their measures is 56 degrees I know supplementary angles are the sum of the measure if two angles is 180 degrees but then what is the question asking?

**math**

A= 5 m x 200 cm A= 500 cm x 200 cm A= 100000 cm2?

**math**

How do areas of two parallelgrams compare when the dimensions of one are three times the demensions of the other?

**math **

A= 100 cm x 1 m A= 100 cm x 100 cm A=10000 cm2?

**math 7th **

similar figuers have the same shap but not the nesessarily the same size. They have corresponding angles and corresponding sides. What exactly do you need help with?

**math**

but I don't get how to tell if it is m or cm

**math**

A= 0.5 m x 20 cm

**math**

the answer is 1m2

**math**

A square with an top as 100cm and a side with 1 m A= b x h A= 100 x1 A= 100 cm2 or m2?

**Weather & Climate (science)**

Why is it that an Aneriod Barometer Can be used to measure elevation as well as air pressure?

**math**

How are sales tax and discounts figured? specifically socks @ $2.99 and 5.5% sales tax

**biology**

when the peple are having s*x

**Weather & Climate (science)**

okayy and there are alot more questionss

**Weather & Climate (science)**

Which ones/one is true? a.)Altitude affects density b.)Altituce is the dictance above sea level c.)Altitude is also call elevation

**Weather & Climate (science)**

Thankss

**Weather & Climate (science)**

1.A(an)_________________ barometer Has a closed space surrounded by metal 2.A(an)_________________ barometer Has a glass tube that is open at the bottom end. ive been tryin thesse for ever! when awncering put like for example ur goi no awncer #1 put 1. then the awncerr

**science**

either e or c

**Weather & Climate (science)**

i just added them to the current questions

**Weather & Climate (science)**

Thankss. Can you help me with some more problemss?

**Weather & Climate (science)**

1. an insturment used to measure air pressure is a(an)___________________________________.

**Algebra/Word problem**

320! i thinkk

**7th grade**

what he said

**spanish**

Correctt

**6th grade math**

But how does it awnser in part related to factors of 10

**math**

i need some serious help with limits in pre-calc. here are a few questions that i really do not understand. 1. Evaluate: lim (3x^3-2x^2+5) x--> -1 2. Evaluate: lim [ln(4x+1) x-->2 3. Evaluate: lim[cos(pi x/3)] x-->2 4. Evaluate: lim x^2+x-6/x^2-9 x--> -3 5. Evaluat...

**statistics**

Give an estimate for each expression in Exercises, Then state whether you believe that the exact answer is greater than or less than the estimate. Explain how you decided. Use a calculator to check the accuracy of your estimate. 978 X 66

**alegbra**

b

**computers**

Can you find both multitasking system and a multiprocessing system operating system?

**algebra**

Thank you for the information.

**algebra**

I have one more step in my question. I have to Find the value of 10^-2.4 by putting this value in a calculator. I do not have a calculator to do this, can anyone help me out?

**language**

Because a compound is when two words are joined together to make one word. Black alone ia a word. Is ness?

**language**

no examples eye + ball= eyeball grand + mother = grandmother

**language**

A compound word is made when two words are joined to form a new word

**language**

Homonyms are words that sound like one another but have different meanings. B

**Algebra- IS this right?**

Evaluate The Logarithmic Equation For 3 Values Of X Greater Than -1 3 Between -2&-1 &x=-1 Y = Ln(x + 2) Y = Ln(x + 2) ,x=3,y=1.6,1.6>-1. X=-1,y=0.

**Algebra- IS this right**

Evaluate The Exponential Equation For 3 Positive, 3 Neg. Values Of X &x=0 Y=3^-x" Y=3^-x,x=3y=1/27, x=-3,y=27,x=0,y=1.

**Algebra**

I need to rewrite the following as an equivalent logarithmic yt = x I wrote logy=logt=logx. My teacher said that was wrong. Can someone guide me on the right answer?

**Algebra**

Given log b 3 = 0.8397 and log b 7 = 1.4873. Find log b 3b Is the right answer 0.8397

**algebra**

My choices for this question are a x = log8 over log 3 b x log = log 8 c x=log 3 over log 8 d x= ln8 over ln3

**algebra**

My choices for this question are a x = log8 over log 3 b x log = log 8 c x=log 3 over log 8 d x= ln8 over ln3

**algebra**

Can you please tell me me if the expression or equation that is equivant to 8^x=3 would be x log 3 = log 8?

**algebra**

Rewrite the following as an equivalent logarithmic equation.Do not solve. y^t = x answer logy+logt=logx-is this right also Express as an equivalent expression that is a sum of logt (3ab) the t is at the bottom of the g answer log3+loga+logb logarithms.

**Is this right**

I need to express as an equivalent expression that is a sum of logarithms. logt 13ab2 is this right (log+13t+loga+log+b+log+2)

**Is this algebra question right**

Do you rewrite the following as an equivalent logarithmic equation yt=x as E^2-2=7.3891?

**Algebra**

what would be the approximation to the nearest ten-thousandth log 8900 over log 110?

**algebra**

Not sure where to go next. I need to solve this quadratic equation 7x^2-5=0. This is what I have so far, not sure where/what to do next x=2/7 x=sqrt2/7 or x=-sqrt2/7* =+/-sqrt2/7 +/-sqrt14/7 not even sure if this is right.

**algebra-Am I right so far**

Use the quadratic formula to determine the x-intercepts (if any)f(x)=2x^2=2 am I right so far? f(x)ax^2+bx+c y=ax^2+bx+c y=2x^2+2 y=0=>2x^2+2=0 =>2x^2+2=0 ax^2=2,bx=2,c=0 x=b=sqrtb^2+4ac over 2a x=(2)+sqrt(2)^24(2)(0)over2(2) x=sqrt4+4over 2

**algebra**

Is the line of symmetry in f(x)= -(x-2)^2+2 x=2

**algebra**

Would the vertex of f(x)= -(x+3)^2+4 be (-4,3)?

**algebra**

Thank you

**algebra**

Use the formula 4.9t^2 +vot=s, where t is the time in seconds, vo is the initial velocity, and s is the distance in meters. Approximately how far will an object fall in 4 seonds, if it is thrown downward at an initial velocity of 20 meters per second (vo) from a helicopter? Is...

**algebra**

I am totally lost on how to solve g(x)=2x^2+3x-1 to find the y and x-intercepts. This is what I have so far, but I don't know if I am on the right track. And if so what would be next? g(x)=2x^2+3x-1 =2x^2+3x -1 =(2x^2+3+6) +3-1

**Math**

solve using the quadratic formula. 3x^2/4 - 1x/4 - 1/2 = 0

**Algebra**

How would I write a quadratic equation having the given numbers as solutions 4i, -4i

**Algebra**

Can someone help me with this question? Use the discriminant to determine whether the following equations have solutions that are:two different rational solutions: two different irrational solutions: exactly one rational solution: or two different imaginary solutions. s^2-5s-6=0

**algebra**

Graphing Quadratic Functions Find any x-intercepts and the y-intercept. If no x-intercepts exist, state this g(x)=2x^2+3x-1

**algebra**

Thank you so much for your help

**algebra**

How do you solve the quadratic formula 9 over 8 - 2 =5 over x^2

**algebra**

Thank you for taking the time to help me out

**algebra**

How do you solve the quadratic equation 7x^2-5=0

**college algebra**

Quadratic formula solve 9 over 8 - 2= 5 over x^2

**college algebra**

Sorry, I did not see it posted the first time so I didn't think it worked.

**college algebra**

How do you solve the Quadratic equation 7x^2-5=0

**algebra**

Determine wheter each pair of equations represent paralle lines. Show work 3x=5y-2 10y=4-6x

**algebra**

Solve using the substitution method and state if the system has a solution. 4p-2q=16 5p+7q=1

**com220**

before someone can fix this for you, you need to cite it.If you dont it is still concidered plagiarised. include the authors last name, date after using their work.

**algebra**

i need help on dis question.

**hca 270**

I wish I could help you, but I am having the same problems in this class. this is my second time through this class.

**physics**

a person carries a 58kg package of books up a flight of stairs the length along the stairs is 24 meters the vertical height of the stairs is 12 meters how much work is done in raising the package I know the answer is 6800 J but how to get????

**Chemistry**

The pH of a nitric acid solution is 1.2. What is the concentration of nitrate ion in the solution? Any help would be greatly appreciated, Thank you!!

**english**

Can you help me find the predicate in this sentence Kerry is one of Irelands twenty-six counties.

**COM 220 Axia college of University of Phoenix**

A.P.A.

**Chemistry**

I'm quite confused with this process, by doing this I get approx. 26 but the actual answer should be approx. 6 :(

**physics**

using ideas of torque and center of gravity explain why a ball rolls down a hill

**All core classes.**

What were some 80's icons? I have a project that's on the most important political and environmental events in the U.S during the 80's. I want to make some titles, for each subject (i had an assignment for almost each class, excluding my elective and p.e), and I...

**Systems of Inequalities-8th Grade Algebra**

I D K!

**Chemistry**

Atoms stick together in bonds to form molecules. What is responsible for this sticking? Thank you.

**History**

I'm designing my energy transformation for my rube goldberg project, and i can't seem to figure out how to design some of them. How could i represent the american boycott of the moscow olympics, the soviet boycott of the Los Angeles Olympics, the signing of the INF tre...

**English**

What's an idiom, simile, or metaphor for getting back at someone?

**english**

What is a simile, idiom, or metaphor for relief?

**History**

How did the Chernobyl disaster affect the U.S? Did it at all?

**Physics**

Two projectiles are launched form ground elvel at the same angle above the horizontal, and both return to groudn level. Projectile A has a launch speed that is twice that of projectile B. What are the ratios of the maximum heights of the balls? What are the ratios of the range...

**Physics**

A tennis ball is hit into the air and moves along an arc. Neglecting air resistance, where along the arc is the speed of the ball a)a minimum and b) a maximum? I'm thinking it's at a max at the begging and end, and a min at the top, but that's just a guess.

**Math (Word Problems)**

I need to know how to set up this problem: A salesman drives from Ajax to Barrington, a distance of 120 miles, at a steady speed. He then increases his speed by 10 mph to drive the 150 miles from Barrington to Collins. If the second leg of his trip took 6 minutes more time tha...

**physiology**

this is an exact question on my physiology final. i'd like to know the answer too

**MATH**

The ratio of graduate students to undergraduate studaent at a certain university is 4 to9. if there are 2340 students at the university how many undgergraduates are there?

**accounting**

On April 1, 2008, Company issued $600,000, 9% bonds for $645, 442 including accrued interest. Interest is payable annually on January 1, and the bonds mature on January 1, 2018. So the way I started the entry was: April 1, 2008 DR Cash 645,442 CR Interest Payable (600,000 *.09...

**science**

What is the Pro's and Con's of energy

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