# Posts by Lily

Total # Posts: 1,544

**Modern History**

Hey :) In the 1968 invasion of Czechoslovakia, was any international (western nations) help requested by those leading the reform or any political leaders such as Dubèek? Any info on this would be great! Thanks :)

**Biology**

Thankyou so much! :)

**Biology**

Hey! :) When looking at the surface area to volume ratio of a cell it's meant to be that the larger this ratio the more efficient the cell is in diffusion etc. I don't get how a ratio of 6:1 though could be the larger ratio in comparison to 54:27...Im just confused ...

**Math**

Please can someone show me the steps to do this problem?? Also, please don't tell me to just google the solution because I've already tried and have tried to do this problem by myself for hours now...Thank you so much. You are measuring trees in a forest. Standing on ...

**Math**

Please can someone show me the steps to do this problem?? Also, please don't tell me to just google the solution because I've already tried and have tried to do this problem by myself for hours now...Thank you so much. You are measuring trees in a forest. Standing on ...

**Math**

Can someone please go over the steps to solve this problem? I know I need to find where the tugboat intersects the radar but I'm not sure exactly how to do this. A radar buoy detects any boats within a radius of 12 miles. A tugboat starts at a location 18 miles SOUTH and ...

**Geometry**

Thanks

**Geometry**

Find the slope of a line perpendicular to the line passing through the given points P(6,-1),Q(3,-2). -3?

**Geometry**

Which of the following statements from Euclidean geometry is also true of spherical geometry? a. A line has infinite length. b. Two intersecting lines divide the plane into four regions. c. Two perpendicular lines create four right angles. d. The intersection of two lines ...

**Geometry**

Thank you

**Geometry**

Find the slope of any line parallel to the line passing through G(2,-3) and H(-1,4). I believe the answer is 7/-3, but was wondering if it should be written 7 7 - / or / ? 3 -3

**english**

Hawaii is one of the most beatiful places on earht. what are the verbs in the sentence

**4th grade math**

suppose a bead maker wants to separate 10,000,000 beads into boxes. She will put 100,000 beads into each box. Into which box would she put the 4,358,216th bead?

**chem**

an aq. solution(NaCl) made by using 133g diluted to a total solution volume of 1 L.Calculate the molarity, molality & mass % of the solution(density of solution = 1.08g/mL) [ans: M=1.92M, m=2.0m, 10.4 %] i need the calculation work bcus my ans is contradict from the real ans...

**chem**

an aq. solution(NaCl) made by using 133g diluted to a total solution volume of 1 L.Calculate the molarity, molality & mass % of the solution(density of solution = 1.08g/mL) [ans: M=1.92M, m=2.0m, 10.4 %] i need the calculation work bcus my ans is contradict from the real ans.

**chem**

thanks...

**chem**

can i know ur answer bcus i got diff. from the actual ans,3.32M but i get 63.93 M. if im wrong could you show me the conversion value to L (0.9709L) and the moles (62.07 mol).(is my calculation)

**chem**

density of 20% by mass C2H6O2 solution in water is 1.03 g/mL. find the molarity of the solution.

**math**

how to find the slope of the curve 17x^2+12xy=100-8y^2 at the point where y=1. -i already d/dx but i didn't know how to find the slope of curve bcus they only give y. d/dx=(-34x-12y)/(12x+16y)

**math**

you get the same ans like me so the ans is wrong. Is that right?

**math**

the 1st term is y^3

**math**

find the eqt. of the tangent to the curves at (1,2). y^3+y^3=9(xy-1) [ans: y=5x-5] could some1 show me the calculation work bcus my ans is y=(6x+4)/5.

**chem**

compute theoretical yield (g) ~2Al+3Cl2->2AlCl3 ~2g Al, 2g Cl2 [ans:2.5g AlCl3] i need the calculation work bcus i got diff from the ans which is 7.12 g.

**chem**

a mixture of 50g of S & 1x10^2g of Cl2 reacts completely to form S2Cl2 &SCl2. Find the mass of S2Cl2 formed. (ans:20.2g) i need the calculation work bcus i got diff. from the ans which is 70.2g.

**geometry**

i think that the 31 and 49 are the angle measures and the NW and SW are just what direction its pointed toward :)

**phy**

Pulling up on a rope, you lift a 4.05 kg bucket of water from a well with an acceleration of 2.50 m/s^2. 1-What is the tension in the rope?

**phy**

A force of magnitude 7.50 N pushes three boxes with masses m_1 = 1.30 kg,m_2 = 3.20 kg, and m_3 = 4.90 kg .The mass is side by side. 1-Find the magnitude of the contact force between boxes 1 and 2, and 2-Find the magnitude of the contact force between boxes 2 and 3.

**phy**

A major-league catcher gloves a 92 mi/h pitch and brings it to rest in 0.15 m. 1-If the force exerted by the catcher is 803 N, what is the mass of the ball?

**Chemistry 2**

I have to calculate the Ccal using the following info: Initial Temp of water outside calorimeter=22.6 C Initial Temp of water inside the calorimeter= 100 C Volume of water in calorimeter= 50mL Volume of water outside calorimeter= 300mL Final Temp of water in calorimeter=27.9 C...

**Algebra**

earned 1000 in 2 mutual funds. one earned 5% profit and the other 2% profit. total profit was $29 how much invested in each mutual fund

**Chem balancing equation**

C5H602+O2 ---> CO2+H2O what is the coefficient of O2?

**english**

Like the popular belief that older adults do poorer in schools than their younger counterparts, the midlife crisis

**World History**

Thank you

**World History**

Who was an English philosopher who believed all people have natural rights? My best guess is John Locke.

**Math**

Lower and upper confidence interval estimate ahead of two months for cod catch (no trend in cod catch but it is changing slowly) for smoothing constant á=0.225 was found 300 and 477.12 tons. If the estimate of ó2 from the monthly catch of two years is s2=900. The...

**math**

How can I find the length of a right triangles leg?

**Religious Studies**

From an academic perspective, when does the Job text first emerge in history?

**Religious Studies**

1. What is “the problem of evil,” and why is it particularly problematic for Western, monotheistic religious traditions?

**World History**

Thanks for the link!

**World History**

One cause of the Peloponnesian War was a. invasion of Athens by the Persians. b. invasion of Crete by the Mycenaens. c. conflict over control of the Delian League. d. economic and commercial rivalries among the city-states. D?

**World History**

The Peloponnesian War began, in part, because of a. economic rivalries among Greek city-states. b. threats of invasion by the Mycenaens. c. alliances formed among Sparta, Persia, and Crete. d. arguments over control of the Delian League. A?

**chemistry- can you check my answers?**

So for a and d are you saying there is no effect?

**chemistry- can you check my answers?**

can you please check my answers?? 9. For the following reaction delta H=2816 kj. 6 CO2(g) + 6 H2O(l) -> C6H12O6(s) + 6O2(g) how is the equilibrium yeild of C6H12O6(s)affected by each of the following? a) increasing pressure of CO2 increase decrease no effect Answer: ...

**MATH URGENT!!!!!!!!!**

SIMPLIFY: s^2+4s-4 SIMPLIFY: x^2-4x-3

**MATH URGENT!**

thanks

**MATH URGENT!**

Madison is standing on the roof of a building that is 350 feet above the floor. She throws a ball straight up with a velocity of 20 feet per second. How long will the ball be in the air before it hits the ground?

**math urgent!**

Tyler is on the 15th floor of a building. She throws a ball straight down from the window, which is 220 feet above the ground. How fast must she throw the ball(in feet per second) for it to hit the ground in 3 seconds?

**math**

So, its 3000grams, because 500g+500g=1000g and 1000g+1000g=2000g and 1000+2000=300grams

**math**

1 kg = 1000 g So, 1000+500=1500 grams

**Math 8th Grade**

Jane's garden is in the shape of a right triangle. One leg of the right triangle is longer than the other leg. The area of the garden is 63 square meters. What is the length of the longer leg?

**Math**

Jane's garden is in the shape of a right triangle. One leg of the right triangle is longer than the other leg. The area of the garden is 63 square meters. What is the length of the longer leg?

**math**

5 combos you idiot

**Math**

=10c+c^2-4c =c^2+6c

**Math--Proportions**

Solve for x: 2 to x+1=x+2 to 3 or 2 to x+3= x+2 to x+5 (the proportions end up being the same in the end) I keep getting to the part after you FOIL, and then I get stuck

**Math**

10^-8 comes out to be a fraction so its smallest 10^-6 is next, also a fraction anything^0=1, so 10^0=1 then they just keep going up, so its 10^5 and 10^9

**math**

a square with perimeter 5 less then the area. perimeter and area equal 45

**Physics**

Find the speed at which Superman (mass=88.0 kg) must fly into a train (mass = 17998 kg) traveling at 60.0 km/hr to stop it. Running into the train at that speed would severely damage both train and passengers. Calculate the minimum time Superman must take to stop the train, if...

**Health**

Thanks again!

**Health**

Smoking marijuana over a long period of time can cause a. chronic bronchitis and damaged lung tissue. b. Alzheimer's Disease. c. tongue cancer. d. all of the above. D?

**Health**

Thank you!

**Health**

Indirect pressure is a. a strategy to avoid doing something you don't want to do. b. being swayed to do something because people you look up to are doing it. c. someone trying to convince you to do something you normally wouldn't do. d. none of the above. B?

**science**

A 3.00- flask is filled with gaseous ammonia, . The gas pressure measured at 28.0 is 1.25 . Assuming ideal gas behavior, how many grams of ammonia are in the flask?

**physics**

2Tsin16.9=mg=0 2Tsin16.9=mg T=mg/2sin16.9 T=54(9.8)/2sin16.9 T=529.2/sin16.9 T=529.2/.581 T=912

**physics**

a ball dropped from a window strikes the ground 2.99s later. how high is the window?

**geometry**

given constant perimeter (people),Irene made a rectangle with an area (tables) of 196 sq. units. she finds that this is the largest area (greatest number of tables) possible for the given perimeter. Irene drew a rectangle with an area of 196 sq. units. she finds that this i ...

**geometry**

A parallelogram has sides of length 3 and 5 and a diagonal length 10. is the quadrilateral a rectangle? please explain

**politics**

Which president closed the tunnel between his country and palestine? The tunnel was a secret passage way in which the palestinies got food and other helpful sources.

**politics**

what are some famous dictators that were either removed or killed and what did they do?

**Politics**

Why was it necessary to remove Hosni Mubarak as the president of Egypt?

**math?**

9/54 ito percent

**math?**

39/40 ino percent

**math?**

4/11 into a prcnt

**chemistry**

H2 (g) is made when 8.5 grams of Li is placed in water. The reaction also creates Lithium Hydroxide. Li + H2O --> LiOH + H2 How much H2 (g) is made? (the (g) means gas!)

**Chemistry**

How many moles of ethanol is contained in 250.0 ml of a 1.90M ethanol solution? A. none of these B. 7.60 C. 475 D. 0.475

**Math**

64ounces

**English**

If I wanted to say--This is Jos's backpack. Would the comma go between the s's as I have included, or would there just be a comma after the s?

**math**

jada baked 4 trays of cookies with a dozen on each tray. she and her brother ate 6 of the cookies while they were still warm. otis baked 4 trays of cookies . he started with one dozen on each tray then his mom removed 6 cookies from each tray to send to otis's grandmother ...

**reading**

what are parts of a poem?

**math please help**

temperature before change = 40 degrees temperature change =up 7 degrees identify the number model below that is correct. then cross out the incorrect model and complete the correct one. 40+7=? or 40+(-7)=?

**math please help!!**

i will make it more clear 10-_?_= 20

**math please help!!**

10-blank=20

**6th grade science fair project**

ABCDEFGHIJKLMNOPQRSTUVWXYZ

**math**

7/1

**math**

2.5/30 is your scale so 2.5/30=8/x a proportion, so cross multiply 2.5x=240 x=96 yeah i think you're right

**Math**

distribute 12x-3<2 add 3 12x<5 divide by 12 x<5/12

**geometry**

the lengths of the diagonal of a rhombus are 2 in and 5 in. find the measure of the angles of the rhombus to the nearest degree. if it helps, we are learning how to use tangent right now!

**Writing**

Hi! Try this Look up the Song, "How do you like me NOW" see how they say it. Then you will know which one to use. Hope I helped! :-)

**US history**

To what extent and for what reasons did the policies of the federal government from 1865 1900 violate the principles of Laissez-Fair which advocated minimal government intervention in the economy?

**calculus**

assume f(x)=-2x+8 and g(x)=5x. What is the value of (f-g)(2)? i got -6 but i don't think that's right...is it?

**Elementary Math**

What if we made a pattern by joining pentagons? If the length of each side of the pentagon is 1 unit, then what would be the perimeter of n pentagons joined together? Note: The perimeter is the distance around the outside of the figure.

**Math**

poo poo

**Math**

maia i hoped your right p.s. answer is H

**Math**

30 plus 30

**physics**

I have for about an hour and a half and I am still not getting the right answer.

**physics**

a 10.0-g object moving to the right at 20.0 cm/s makes a elastic head-on collision with a 15-g object moving in the opposite direction at 30.0 cm/s find the velocity of each object after the collision.

**math**

Is x<z<y what you are looking for?

**AP chemistry**

If 25.0g of water are decomposed at RTP how would you find the volume of hydrogen gas produced?

**math**

i have a math competition next saturday can some please give me advice on how to study. some sites snd stuff i really need help for algebra thank you in advance

**math**

i have a math competition next saturday can some please give me advice on how to study. some sites snd stuff i really need help for algebra thank you in advance

**math**

thank you