Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 539

**Science**

There are two set pieces in a theater sitting on platforms with wheels. One is a tree with a mass of 50 kg. It is moving at 3 m/s. The other is a fence with a mass of 30 kg. If the two set pieces have equal momentum, how fast is the fence moving? A. 3 m/s B. 5 m/s C. 30 m/s D....

**Chemistry**

Suppose that coal of density 1.5 g/cm3 is pure carbon. (It is, in fact, much more compli- cated, but this is a reasonable first approxima- tion.) The combustion of carbon is described by the equation C(s) + O2(g) −→ CO2(g) ∆H◦ = −394 kJ What is th...

**Chemistry**

Calculate the volume of NaOH 0.5 mol/L necessary to neutralize 300 mL of HCl 0.2 M. na= how do I calculate this? Ma= 0.2 M Va= 0.300 L nb= 0.5 mol Mb= 0.5 M Vb= ?

**language art pllz help**

A B C B B

**Chemistry**

HELP!! I'm doing an experiment to do with phosphorus and plant food and MgNH4P04 6H20 my air dry weight of MgNH4P04 6H20 was 1.31 g grams of P in plant food was .165 g % P in plant food is 13.87% % P205 equivalent to % P above is 63.02% % P 205 in 10-52-10 is 52% i then ge...

**History**

Mark the statement if it describes Roman society during the time of Cincinnatus. A. Rome’s government was based on law in which many people had a voice. B. Rome was being surrounded and threatened by outside forces. C. People in Rome admired those who used their abilities...

**Chemistry**

Vitamin K is involved in normal blood clotting. When 1.05 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 3.53 Â°C. The freezing point and Kf constant for camphor can be found here. Calculate the molar mass of vitam...

**Chemistry**

Given that the vapor pressure of water is 17.54 Torr at 20 Â°C, calculate the vapor-pressure lowering of aqueous solutions that are 1.90 m in (a) sucrose, C12H22O11, and (b) aluminum chloride. Assume 100% dissociation for electrolytes. I got .5799 Torr for sucrose, ...

**Math**

I forgot the - in the above answer that I gave. It should really be y+7=-2(x-2) y=-2x-3

**Math**

The key to perpendicular lines is that the slopes will multiply together to get negative one. Since your original slope is 0.5, your new slope will be -2. Passing through your stated points, the point-slope equation of the line will be: y-(y1)=m(x-(x1)) plug in your slope & po...

**Science**

Different climates and enviornments all together. A desert has very little water, so all the plants and animals are adpated to such conditions ex: cactus. What animals come to mind in the desert are mostly cold blooded reptiles. Forest ecosystems on the other hand, have just t...

**Bronies**

What are bronies? I hear about it all the time. Does anybody know?

**algebra 2 honors**

2x^2-12x+32=x^2 how would I solve this by factoring?

**algebra 2 honors**

2x^2-12x+32=x^2 how would I solve this by factoring?

**english**

is it possible to find evidence that could ever disprove a conspiracy theory? why/why not?

**algebra 2**

So I am doing my algebra home work and I get stuck on these three problems. x^2-19x+72 from there idk what to do because nothing multiplies up to 72 and adds up to -19. Same for this one. x^2-25x+48 And x^2+9-90 (X+15) (x-6)

**algebra 2**

So I am doing my algebra home work and I get stuck on these three problems. x^2-19x+72 from there idk what to do because nothing multiplies up to 72 and adds up to -19. Same for this one. x^2-25x+48 And x^2+9-90 (X+15) (x-6)

**math**

A traveler went 10 miles south, 7 miles east, 2 miles south, and 2 miles west. How many miles is the traveler from the start?

**science**

I don't know

**AP chemistry**

001 (part 1 of 2) 10.0 points A 1.37-gram sample of compound X (of MW 88.0 g/mol) was burned in a bomb calorime- ter containing 1700 g of water. A temperature rise of 0.95◦C was observed. ∆Erxn for this re- action is −475 kJ/mol of X. What is the heat capacit...

**physics**

n object is dropped from rest. What is the acceleration after 6 s? The acceleration of gravity is 9.8 m/s 2 . Answer in units of m/

**social justice**

what are some of the social and economic consequences globally due to the shift to lifestyle branding?

**Math**

A total of 68 awards will be given to the soccer team. Each box holds 8 awards. How many awards are in the partially filled box?

**english**

what are your political, economic and autonomy goals?!

**bio 11**

must the steps in the scientific method always be followed in the same order? Explain.

**bio 11**

what is the only difference between a control set up & an experimental set up?

**8th grade algebra**

While on vacation a group can rent bikes and scooters by the week. They gett a reduced rental rate if they rent 5bikes for every two scooters rented. The reduced rate per bike is $15.50 amd the reduced rate per scooter is $160 a week. The sales tax on each rental is 12%. The g...

**8th grade algebra**

While on vacation a group can rent bikes and scooters by the week. They gett a reduced rental rate if they rent 5bikes for every two scooters rented. The reduced rate per bike is $15.50 amd the reduced rate per scooter is $160 a week. The sales tax on each rental is 12%. The g...

**socials 11**

why were provincial premiers opposed to the charter or rights and freedoms?

**Math**

How do i find surface area of a rectangular prism?

**socials 11**

what was pierre's laporte reasons for asking robert baroussa to save his life by meeting the demands of the FLQ?

**socials 11**

discuss the treatment of aboriginal people in Canada during the 20 century

**socials 11**

do you think that Canada is truly a bilingual country? explain.

**socials 11**

do you think that the Canadian Government should have the ability to suspend certain civil rights in "emergency" situations? explain.

**socials 11**

how come illegal immigrants who are entering Canada such a problem for Canada?

**socials 11**

what do you think Canada should do with the economic immigrants arriving off the coast?

**socials 11**

why was the issue of West Coast salmon such a controversial issue?

**socials 11**

explain what increased privatization of the healthcare system would entail, and list the pros & cons of such a system.

**socials 11**

why is health care a growing concern for Canada?

**socials 11**

what do you think is the best solution for Canada's current healthcare predicaments?

**socials 11 (health care in canada)**

why is health care a growing concern for Canadian citizens?

**socials 11 (health care in canada)**

explain what increased privatization of the healthcare would entail, and then list the pros and cons of such a system

**world geography**

They are frozen?

**world geography**

They are frozen?

**Chemistry**

calculate the natural logarithm and reciprocal concentration at 0 seconds and NO2 concentration (M) of .8333 and at time 20 (seconds) and .4617 NO2 concentration (M)

**socials 11**

why did Trudeau lose popularity in the 1970s?

**socials 11**

why did OPEC raise the price of oil in 1972?

**socials 11**

why did canada's ties with cuba, in particular, represent a move away from adherence to american foreign policy?

**socials 11**

what did the automotive products agreement change between canada and the us?

**socials 11**

why was the expo 67 a significant moment for French-Canadians?

**socials 11**

why did tvs become so popular after the ww2?

**socials 11 (post war 1946-1980)**

what was the extent of Canada's involvement in the Marshall Plan?

**socials 11 (the beginning of the cold war)**

in what sense did the concept of MAD keep both sides from going to war?

**socials 11**

why was totalitarian needed for ww2?

**Chemistry**

Explain why the FeCl3-KCI-HCl solution was used as a reference solution. Suggest a procedure you could follow to determine whether it was necessary to use this solution as a reference or whether distilled water would have been just as satisfactory.

**socials 11**

explain how the clothing women wore during the 1920s was indicative of their changing role.

**socials 11**

what event in europe inspired the formation of some canadians trade unions?

**socials 11**

what event in europe inspired the formation of some canadians trade unions?

**socials 11**

world war 1 !

**socials 11**

what war-related issue affected French and English relations in Canada for years to come?

**socials 11**

explain why the issue of conscription helped to further divide English and French relations in Canada.

**math**

ok! thanks a lot.

**math**

but the answer should be $ 26. 65 !

**math **

The markup on a restaurant mean is 250%. A meal costs $7.25 to produce. How much will the customer be charged, after markup and 5% GST are applied?

**socials 11**

ww1

**socials 11**

although the German troops met with success against the invading Russian troops, in what way did these battles hurt the Germans?

**socials 11**

what would happen if troops managed to capture the enemy's front line?

**socials 11**

Why did entering no mans land come to mean almost certain death?

**Government**

Homework Help Powers that are shared by both the National Government and the States are called... A) reserved powers B) enumerated powers C) inherent powers D) implied powers E) concurrent powers The Supreme Court carries out most of the country's procedures for persons be...

**Math**

In math we're doing a review sheet and i dont get any of it so can someone please help!! What is the simplest form of the expression Radical 28 + radical 175 - radical 7

**math**

thank you ms.sue

**math**

a jet travels at 435.6 miles per hour. how far will it travel in 6.75 hours?

**4 grade math**

Find two mixed numbers so that the sum is 15 3/10 and the difference is 8 5/10

**4th grade math**

Find two mixed numbers so that the sum is 8 4/8 and the difference is 2 2/8

**Chemistry**

What concentration of SO32– is in equilibrium with Ag2SO3(s) and 3.60 × 10-3 M Ag ? The Ksp is 8.46×10–12.

**Literature ?! Check my answers?**

C C B trust me i just took it

**physics**

A 35,000 kg locomotive is moving at a velocity of 11 m/s east. What is the magnitude of the locomotive's momentum?

**Math**

Jeremy and Cynthia leave at the same time to travel 75 miles to an area. Jeremy drives 15 miles in 12 minutes. Cynthia drives 26 minutes in 20 minutes. If they continue at the same rates, who will arrive at the area first?

**8th grade math **

In the original design for the livingroom genivie ve planned to have a 6ft by 8ft floor rug made after looking at the budget however she discovers she only had enough money to make a .75 times the size of the original how much fringe must she purchase to outline the new rug.

**social studies**

what nation is home to the gonges and indus river

**World Geography**

For good crops, Syrian farmers are still largely dependent on what?

**Geometry**

A 20 foot ladder is leaning aagainst a wall the base of the ladder is 7 feet away from the.wall hkw high up the wall will the ladder reacb

**Geometry**

A 20 foot ladder is leaning aagainst a wall the base of the ladder is 7 feet away from the.wall hkw high up the wall will the ladder reacb

**Physics**

So just for the record, the answer for A is right. For B, when calculating the resistance R, I messed up in regards to the radii. For the length i needed to use r=.034m and for the area r=4.5e-4m. What a silly mistake. Cheers! and thanks for responding! :)

**Physics**

I don't understand what you just did for A. I used emf=change in flux/change in time flux = magnetic field*area according to my book, the answer for A is right. Please explain!

**Physics**

A circular conducting coil with radius 3.40 cm is placed in a uniform magnetic field of 1.090 T with the plane of the coil perpendicular to the magnetic field. The coil is rotated 180° about the axis in 0.222 s. (a) What is the average induced emf in the coil during this r...

**Chemistry**

What is the final temperature after a 11.9 g piece of ice is placed into a Styrofoam cup containing 110 g of hot water at 73.3 degrees Celsius?

**math**

Charles mixed pineapple juice and orange juice to make a fruit punch. He made a total of 5 1/2 cups of the mixture and used 2 more cups of orange juice than pineapple juice. How much did he use of each type of juice?

**Chemistry**

Part A answer was number two and Part B was number one

**math average!**

My average is a 74 right now. My grades are 70( which counts as 60% as my grade and i have 2 more major test coming up) 94, 60 (which counts as 25% and i have about 5 more of this coming up) 90,100,83,91,71( i have about 3 more of these and they count as 15%) This was an exten...

**math**

I have a 76 average right now, what grades do I need to get if i have 5 more tests and need to get an 85 average?

**Math**

Gina cut a piece of ribbon into 3 equal pieces. Then she cut off 2 inches off one piece to make it 3 inches. How long was the original piece of ribbon?

**Algebra**

LCD of x/x2+3x , 2x/x2-3x

**Physics**

Vf=Vi+at Vf=20 m/s+ 7m/s^2*3s Vf=41 m/s

**Physics**

Three point charges are on the x axis: −6 µC at −3 m, 7 µC at the origin, and −5 µC at 3 m. Find the force on the ﬁrst charge. The value of the Coulomb constant is 8.98755 × 10^9 N · m^2/C^2.

**physics**

A point charge of +1 µC is located at x = −2 cm and a second point charge of −8 µC is located at x = 6 cm. Where should a third charge of +1 µC be placed so that the electric ﬁeld at x = 0 cm is zero?

**social studies**

General Grant's army came closest to defeat in the West as a result of a surprise Confederate attack at the Battle of A. Fort Henry. B. Shiloh. C. Vicksburg. D. Manassas

**physics**

the muzzle velocity of a 50.0g shell leaving a 3.00kg rifle is 400 m/s what is the recoil velocity of the rifle

**statistics**

Scores on the ACT college entrance exam are Normally distributed with a mean µ = 20 and standard deviation σ = 5. An SRS of 25 ACT scores is selected, construct a 95% Confidence Interval for the sample mean (X-Bar) and interpret your result.

**physics**

A solid sphere of radius 23 cm is positioned at the top of an incline that makes 23 degree angle with the horizontal. This initial position of the sphere is a vertical distance 3 m above its position when at the bottom of the incline. The sphere is released and moves down the ...

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