# Posts by Eliza

Total # Posts: 123

**Social Studies **

Which early civilization had a well-organized, unified empire with an elaborate system of roads covering more than 10,000 miles? Iroquois Aztecs Mayan** Incas can someone check my answer please?

**Chemistry **

If 226 g of water is contained in a 311 g alu- minum vessel at 11?C and an additional 92 g of water at 91?C is poured into the container, what is the final equilibrium temperature of the mixture? The specific heat of aluminum is 900 J/kg · ?C and of water 4186 J/kg &...

**Chemistry **

If 226 g of water is contained in a 311 g alu- minum vessel at 11?C and an additional 92 g of water at 91?C is poured into the container, what is the final equilibrium temperature of the mixture? The specific heat of aluminum is 900 J/kg · ?C and of water 4186 J/kg &...

**Chemistry**

A 7 gallon bucket of water of mass 26.502 kg and temperature 100?C is added to a 62 gallon gallon tub of water of mass 234.732 kg having a temperature of 10?C. What is the final equilibrium temperature of the mixture? Assume there is no loss of heat to the surroundings. Answer...

**Chemistry **

A 300 g glass thermometer initially at 32 ?C is put into 165 cm3 of hot water at 88 ?C. Find the final temperature of the ther- mometer, assuming no heat flows to the surroundings. The specific heat of glass is 0.2 cal/g ·? C and of water 1 cal/g ·? C. Answer in ...

**math**

What is the area of a quadrilateral ABCD, if AB = 5 cm, BC = 13 cm, CD = 9 cm, DA = 15 cm, AC = 12 cm?

**Chemistry**

35.0mL of 0.050 M HCl is titrated with 0.050 M NH3 (Kb= 1.8 x 10^-5). The pH of the analyte solution after 15.0mL addition of NH3 titrant is?

**Math**

p=2s

**Physics**

a) Rain drops hitting the side window of a car in motion often leave diagonal streaks if there is no wind. Why? b) For a certain projectile, the horizontal range is twice in magnitude of the maximum height attained by it. Find its angle of projection.

**Chemistry**

Thanks :)

**Chemistry**

What is the salt most likely to be formed at the junction of the Fe2+ions and SiO4+

**English**

CORRECT ANSWERS ARE: 1D 2B 3D 4A 5A 6B 7A 8D 9D 10C 11A 12B 13C 14A 15C 16C 17B 18D 19A

**Chemistry**

How can dilute a 1 M HCl solution to obtain 100 mL of HCl solution 0,1 M?

**Please check Ms. Sue on math!**

An ice cream shop offers the toppings shown below. How many 4-topping ice cream sundaes can you make? chocolate chips walnuts strawberry sprinkles caramel hot fudge whipped cream gummy bears 11 28 ** 30 35

**Probability! Check please!**

An ice cream shop offers the toppings shown below. How many 4-topping ice cream sundaes can you make? chocolate chips walnuts strawberry sprinkles caramel hot fudge whipped cream gummy bears 11 28 ** 30 35

**Physical Science**

Oh gosh...then would it be B?

**Physical Science**

A ferromagnetic material is A) always a magnet B) a magnet if it's domains are aligned C) a magnet if it's domains are not aligned D) never a magnet I think it is A....

**Science**

Your question makes no sense, try providing a more detailed question.

**LANG ARTS**

Now you'll "know" next time :)

**LANG ARTS**

That's not what this site is for....please don't ask those kinds of questions...because they definitely won't be answered, so don't waist your time and the teachers' time asking them.

**Technology**

Correct

**Science**

A ferromagnetic material is A) always a magnet B) a magnet if it's domains are aligned C) a magnet if it's domains are not aligned D) never a magnet I'm pretty sure it's A....

**Technology**

Give your choices....

**Grammar**

Also it is "grammar" not "grammar"

**Math**

I don't think anyone here speaks Japanese

**Technology**

No prob :)

**Technology**

That's is definitely correct

**LANG ARTS**

Yup :) go ahead

**LANG ARTS**

The third sentence :). Also, it would be good to look up the definition of "simile" that should help you next time....

**LANG ARTS**

You have to provide the "line of poetry" in order to receive help from anyone....be efficient with your questions.

**Science**

What do YOU think the answer is. The teachers are happy to CHECK your answer, but not TELL you them.

**math**

Have you tried it yourself first? If so, show your work and then the teachers will tell you if you are right or wrong, and guide you through the "right way" so you may get your answer.

**U.S. Gov. & Ec.**

Oh ok! Yayyyyyyyy thank you

**U.S. Gov. & Ec.**

I think 😬

**U.S. Gov. & Ec.**

That makes sense! then is it C? Because that makes more sense...

**U.S. Gov. & Ec.**

What is the main feature of public-interest groups? A. They cannot collect dues, so membership is free. B. They have special access to elected officials. C. They benefit most people, even those not in the group. D. They are supported by everyone, regardless of political party...

**help please english**

I only got 7/10 with Kiera's answers.

**Math PLZZ**

okay i cant stand people lying, so for the 8th grade practice it is D D A C

**Science**

a. A human cell is placed in a container of sugar water. Explain what would occur, if the cell membrane is impermeable to sugar. b. Another cell is placed into a container of sugar water. However, this cell has the capability to allow large molecules such as sugar to pass ...

**Biology**

a. A human cell is placed in a container of sugar water. Explain what would occur, if the cell membrane is impermeable to sugar. b. Another cell is placed into a container of sugar water. However, this cell has the capability to allow large molecules such as sugar to pass ...

**Chemistry (Solutions)**

i really need help

**Chemistry (Solutions)**

the answer i got was 1500 is this correct??

**Chemistry (Solutions)**

Since 1991, house paint produced in Canada must contain no more than 600 ppm of lead. What is the maximum mass of lead permitted ion a 2.50 kg can of paint

**math**

sqrt(2(13.7)/9.8)

**Algebra**

Bill can mow his mother's lawn in 45 minutes. His brother Jim can mow it in 75 minutes. How long will it take them to do it together? Can someone help with with the work? But also an explanation of how it works? I want to understand this so I don't miss it on the test.

**Algebra**

Suppose that A = D + E and that D/A = 0.80. Solve for D/E. These are the steps I have taken, but I don't know how to proceed. 1. Divide A = D + E by A. 2. 1 = .80 + E/A 3. .20 = E/A 4. A/A = 1, D/A = .80, E/A = .20.

**physics**

A certain transverse wave is described by the equation y(x,t) = (6.50 mm)sin2pi((t/0.0360 s)-(x/0.280m)) Determine the wave's (a) amplitude (b) wavelength (c) frequency (d) speed of propagation and (e) direction of propagation

**Chemistry**

A 26.0 g sample of ice at -17.0°C is mixed with 124.0 g of water at 81.0°C. What is the equilibrium temperature?ºC.

**american history**

in the election of 1860, the---------- won the electoral votes of all y the free states, except a fraction of t he new jersey votes. a)constitutional union b)Whigs c)democrats d)republican

**Maths**

Show that 8^x =square root 2 5^x=1/square root 25 (3)

**Chem**

Give three examples each of household items that have: a. different structures and exhibit different properties b. same chemical make-up composition but a different structure, hence, different properties c. the same properties but with different chemical composition

**Chemistry**

Give three examples each of household items that have: a. different structures and exhibit different properties b. same chemical make-up composition but a different structure, hence, different properties c. the same properties but with different chemical composition (If ...

**Chemistry**

What is the mass of a cylinder of lead that is 2.50 cm in diameter and 5.50 cm long. The density of lead is 11.4 g/mL. Find the volume of the cylinder.

**algebra**

A coin is tossed 3 times. Find the probability of obtaining the following: a) heads on the first and last toss, and tails on the other toss b) at least 2 heads c) at most 2 heads

**algebra**

A computer repair shop has estimated the probability that a computer sent to the shop has a bad modem is 1/8, the probability that the computer has a bad CPU is 1/5, and the probability that it has a bad drive is 1/3. If we assume that modems, CPUs, and drives are independent...

**math**

The sales of a certain product after an initial release can be found by the equation where s represents the total number of units sold and t represents the time in weeks after release. How many weeks will pass before the product sells about 150 units? Round your answer to the ...

**Math**

Students raised $45 what percent of their goal did they raise if they are in goal is $60

**Physics**

A car with a mass of 1815 kg is traveling down a road for 50 meters. It takes the car five seconds to travel this distance. Calculate the velocity, momentum, and kinetic energy of the car.

**MATH**

A NICKLE HAS A MASS OF 5G AND A VOLUME OF APPROXIMALEY 0.689 CM3. WHAT IS THE APPROXIMATE DENSITY OF A NICKLE?

**Calculus**

ind the derivative of y= (2x^2+1)/(x-3)

**chemistry (molecular calculations)**

If you had 106.35 grams of Cl, how much Na would be required to convert i all to NaCl. I worked this problem and got 41.83 grams of Na, but I'm not sure if this is correct.

**Molecular calculations (chemistry)**

If you had 19 grams of F, how much Ca would you need to convert all of the F to CaF2?

**algebra**

Bad boy is fleeing the scene of a crime at 75 mph. Half an hr. later the police chase after him following his same route-traveling at 90 mph. Bad boy thought he got away... but he didn't... How long had Bad boy been traveling when the police caught him?

**Basic Math**

How can absolute value help one to understand the size of a quantity? Give an example. I'll appreciate anyone's help thanks. :)

**Basic Math**

How can absolute value help one to understand the size of a quantity? Give an example. I'll appreciate anyone's help thanks. :)

**Chemistry**

Upon decomposition, one sample of magnesium fluoride produced 1.65kg of magnesium and 2.58kg of fluorine. A second sample produced 1.50 kg of magnesium. How much fluorine (in grams) did the second sample produce?

**Chemistry**

Can someone please help me solve this homework problem for my chemistry class.It's my last problem and I'm stuck!:/ Thanks :) A 4.0*10^1kg sample of water absorbs 308KJ of heat. If the water was initially at 25.5 C, what is its final temperature?

**Science**

Can someone please help me solve this homework problem for my chemistry class.Thanks A 4.0*10^1kg sample of water absorbs 308KJ of heat. If the water was initially at 25.5 C, what is its final temperature?

**Chemistry**

When 47.3J of heat are added to 13.0g of a liquid, its temperature rises by 1.76C. What is the heat capacity of the liquid?

**math**

Oops,first question was wrong. Sorry. There are 30 kids in a class room.3/5 of them are girls. How many are boys and how many are girls.

**math**

There are 30 kids in a class. 3/5 are girls, how many of the are girls

**math**

Suppose the weekly use of gasoline for motor travel by adults in North America is approximately normally distributed, with a mean of 14 gallons and a standard deviation of 6 gallons. What proportion of adults use more than 18 gallons per week?

**Math**

If the area of a triangle is one-ninth of the area of another triangle, how do the perimeters of the two triangles compare?

**Math**

if the length of a rectangular pyramid is made seven times longer, how many times the volume of the original figure is the volume of the new figure?

**pharmaceutical calculations**

1. A chemical crystal weighs 3.630 grams in air and 1.820 grams when immersed in an oil. If the specific gravity of the oil is 0.837, what is the specific gravity of the chemical? 2. A piece of wax weighs 42.65 grams in air, and a sinker weighs 38.42 grams in water. Together ...

**calc**

The top half of a storage tank is a circular cylinder that is 5 meters tall and has a diameter 2 meters. The bottom half of the tank is shaped like an 8-meter inverted cone (pointed down). Let h represent the depth of the tank's contents. At t = 0 minutes, a release valve ...

**calc**

what is h?

**calc**

Suppose the function f(x)=4/x a) Use the definition of the derivative to show that f ' (-2) = -1. b) Write an equation for the line tangent to the graph of f at x = -2.

**calc**

Suppose the function a) Use the definition of the derivative to show that f ' (-2) = -1. b) Write an equation for the line tangent to the graph of f at x = -2.

**calculus**

How long will it take an investment that pays 5% compunded annually to double in value?

**Algebra**

(5y-3)/3 - (2y-1)/2=1 note: the divide signs are the fraction bars. -5(-2(x-1) - (x+1))=9 .08n-.09(n-2)=5-.08 -2(3-(x-1)+3x) + 2(x-3-5(x-3)-x)=10 please show me how you got the answers thanks

**math**

find the length of a side of a square whose area is 400 cm^2

**(pharmaceutical calculations)**

1. A chemical crystal weighs 3.630 grams in air and 1.820 grams when immersed in an oil. If the specific gravity of the oil is 0.837, what is the specific gravity of the chemical? 2. A piece of wax weighs 42.65 grams in air, and a sinker weighs 38.42 grams in water. Together ...

**Japanese**

Sorry I'm a bit late.

**Japanese**

No no no... It's 1) watashiwa 6:00 ni okimasu 2) 6:30 ni asagohan wo taberu 3) 8:15 ni gakkou ni iku 4) kuru,a wo tsukatte ikimasu 5) 1:05 ni ohiru gohan wo tabemasu 6) gakkou no ato ni shukudai wo yarimasu 7) 6:30 ni yoru gohan wo tabemasu 8) neru maeni Biggest Loser wo ...

**PHYSICS**

A thundercloud has an electric charge of 43.2 C near the top of the cloud and -38.7 C near the bottom of the cloud. The magnitude of the electric force between these two charges is 3.95 x 106 N. What is the average separation between these charges? I'm confused, help ...

**ALGEBRA II**

In circle O, chords AB and CD are congruent. AB measures 2x + y, while CD has a length of 16.5. Two smaller chords, GH and KL, are also congruent. GH measures x + 2y, while KL has a length of 13.5. Find the values of x and y.

**Physics**

I was walking through my local home supply store the other day carrying a 10 ft length of plastic pipe. The pipe was horizontal and my hand was supporting the middle of the pipe. I noticed that when I took two steps each second the ends of the pipe would move up and down a ...

**Hum/176**

Have ou ben able to prove your thesis in your intro paragraph? Have you opened up any avenues of dialogue or argument? Can you see how you'll relate your conclusion to your introduction and do you have enough material between, with what you've written, to fill out a ...

**geometry**

In right triangle ABC, angle A=3, angle B=60, and angle C=90. Find AB with AC is 12 ?

**12th Grade Calculus**

1. a.) Find an equation for the line perpendicular to the tangent curve y=x^3 - 9x + 5 at the point (3,5) [* for a. the answer that I obtained was y-5 = -1/18 (x-3) ] b.) What is the smallest slope on the curve? At what point on the curve does the curve have this slope? c.) ...

**social studies (regions)**

Regions are a way to describe and compare places. A region is identified by its common characteristics and/or features. Identify five common five common regions throughout the world accoarding to their common characteristics, (ex. Deserts: the Sahara and Gobi deserts share ...

**social studies (latitude & longitude)**

what is the city and continent name of these : 34° S and 58° W 34° S and 18° E 51° N and 0° 30° N and 31° E 40° N and 2° W 36° N and 4° W °°°° Please please help ! i have been trying to find the answer to these ...

**12th grade - Math**

Solve by Factoring: 1.) x²- x + 12 = 0 2.) 4x³ + 21x² - 18x = 0 3.) x³- x² - x + 1

**12th grade - Math**

1.) Explain why |8-15i| = 17

**Physics**

An iceboat is at rest on a frictionless frozen lake when a sudden wind exerts a constant force of 220 N, toward east, on the boat. due to the angle of the sail, the wind causes the boat to slide in a staraight line for a distance of 8.5 m in a direction 20° north of east. ...

**language arts**

in this sentence what is the contrast " Water like fat raindrops that fall from skinny trees "

**S.S**

What did Europe begin in the mid-1400s?

**S.S**

All it says is "Because of the important developments that shaped life as we know it today in the West, historians trace the beginnings of the "Modern Age" from these times. This pre-modern period begins with the Renaissance in about A.D. 1350 and ends with the ...

**S.S**

Is the Renaissance the beginning of the Modern Age?