Thursday
April 24, 2014

Posts by Leena


Total # Posts: 73

physics
need five differences between compounds and molecules...... got only one that is ;A molecule is formed when two or more atoms join together chemically. A compound is a molecule that contains at least two different elements.

world history
what was African society and economy like prior to European imperialism?

Chemistry
What would be the temperature change if 3.0g of water absorbed 15J of heat?

world history
Why did Great Britain lead industrialization during the 18th century?

Chemistry
A sample of NH3 gas occupies 75.0 liters at STP. How many molecules is this?

english............... can't decide
Just got a debate to write on the following topic: Modern Means of Communication have Brought People Closer Are there more valid points if i write against the topic? Help................

maths
what is the cost of spraying insecticide on a field measuring 2000m by 3200m if the cost is $22 per hectare.

maths
i forgot to mention that take pie as 3.142 and give the answer correct to two decimal places if necessary.

maths
find the speed of a point on the rim of a 24-cm diameter fly -wheel which is tuning at 2800 revolutions per minute. give your answer in meters per second.

maths..... geometry word problems
thank u Miss. Sue

maths..... geometry word problems
the length of a rectangle is 8 cm more than its width. if its perimeter is 56 cm, find its area.

Geometry..... reposted ques by me
i did not made the diagram like this.......

Geometry..... reposted ques by me
here is the diagram Steve but it is not perfect. All sides are in cm. there r no dotted lines, but i didnt had any choice. /| / | / | / | / | / | / | / 10.5 | /\ | 10 / \ | / \ | / \ | A ------------ B E ______20______

Geometry..... reposted ques by me
the maths tutor where online because ques which were posted after me were answered, and why reposts will be deleted

Geometry..... reposted ques by me
in the diagram AB=20 cm, BC=21 cm, AD=10 cm and DE= 10.5 cm. Angles ABC and ADE are right angles. if triangle ADE is removed from triangle ABC.What is the area of shaded region that remains?

geometry
in the diagram AB=20 cm, BC=21 cm, AD=10 cm and DE= 10.5 cm. Angles ABC and ADE are right angles. if triangleADE is removed from triangleABC.What is the area of shaded region that remains?

english........bridges
<3

english........bridges
thanks ...... :)

english........bridges
is 'Go Between Bridge' an important landmark for the country? Explain why or why not.

urdu
can anyone who can study urdu give me the character sketch of 2 main characters of "aali par kia guzri" a book written by a urdu poet called Aziz Asri.

geography
i found 1 more difference; Volcanoes are created by debris from their own eruptions but fold mountains are formed by slow motion collisions of earth's plates

geography
ok if u wish i will read it again

geography
i cannot find any similarities from this link. :(

geography
can you give me some more similarities.

geography
Compare and contrast folded mountains to volcanic mountains. How they are alike? How they are different? i got some of it.. Similarities: Both were probably formed from convergent plate boundaries. Difference: Volcanic Mountains - are mountains that form when molten rock erupt...

geography
ok thank you :)

geography
Sometimes high winds can cause disasters. Wind can flame a fire or destroy a rooftop. Wind also does some very good things. Explain one good thing that happens as a result of wind.

poem
i am sorry

poem
write a acrostic poem on continents. C O N T I N E N T S

math
i can help u. First, draw a picture (it helps to visualize ^_^): S    a    M    b    T where S = start M = meeting point T = turn around point Let b = brother and a ...

english
it was so easy but i was confused.

english
i got it..... 1) is doing 2) is working 3) is mowing 4) is always talking 5) is always doing 6) is singing 7) is cooking 8) is putting 9) is sitting 10) is boiling 11) is baking 12) is starting 13) are playing 14) are laughing 15) are making 16) is getting 17) is crashing 18) ...

english
Fill in the spaces with the correct form of the verb in present continues tense. Hey! Do you want to hear about what my family (do) ________ ________(1) right now? Well, I hope you do, because I am going to tell you! Right now, my dad (work) ________ _________ (2) outside. I c...

english
need to write a short essay on 'describe a trip you took with your family or friends. It could be to another state, another town, or to a store. You should talk about what happened, why, and when.'

english
i just need to write it of 250 words.

english
yeah this is included in vacation work. Can u help me out........

english
no i haven't in my life ever taken care of a neighbor's baby.

english
i need to write an essay on 'the day your neighbour asked you to look after her young baby while she went to market.' please give me some ideas.....

chemistry
Molar mass CuSO4.5H2O = 249.69 g/mol You want 400ml of 0.85M: 249.69 *400/1000*0.85 = 84.9g CuSO4.5H2O dissolved to total volume 400ml.

history
i need to write a short note on mughal empress princess jahanara

history
ok thanks

history
hi! Ms. Sue, i am Leena the link about James_Cook was not helpful as i have to write a short note. Kindly please can you write a short note of 170-180 words on the travelling experiences of 'James Cook' for me.

history
write a short note of 170-180 words on the travelling experiences of 'James Cook'

science
explain the comment ''your brain makes you, you''

history
Akber became emperor at only thirteen years of age. Research his reign. What were his greatest achievements as emperor?

science
why would a spinal cord injury leave someone paralyzed?

math
a blue rectangular tile and a red rectangular tile are similar. the blue tile has a length of 10 inches and a perimeter of 30 inches. the red tile has a length of 6 inches. what is the perimeter of the red tile?

maths
find the number of bricks, each measuring 25 cm x 16 cm x 10 cm required to construct a wall 24 m long, 6 m high and 0.4 m thick. the mortar occupies (1/10)th of the volume of the wall

Chem
Hey in class we learned that pi molecular orbitals come from overlapping p atomic orbitals...this occurs in a conjugated system or aromatic rings ( contains sp2 carbons with one remaining p orbital which can can overlap to form double bonds)...my question is why does it have t...

Organic chemistry
please help me with these what are the functional group(s) in Lexiva (Fosamprenavir Calcium)? i only know that it has an amine group but i'm not sure if there is another group!!! and how can i relate Lexiva to chemistry?(ideas please)

math
(76-12)-(48divided by 8)2

Math
For a certain set of five numbers, the mean of all but the largest is 80, and the mean of all but the smallest number is 90. What is the range of the set of five numbers?

physics
Find angle of refraction through a 60° triangular prism of edge length 4.5 to 5 cm, if angle of incidence are 30°,35°,40°,45°,50°,55°& 60°

Physics
Never mind! Figured it out!

Physics
A particle starts from the origin at t = 0 with an initial velocity of 8.0 m/s along the positive x axis. If the acceleration is (-3.7 + 2.5 ) m/s2, determine the velocity and position of the particle at the moment it reaches its maximum x coordinate.

friendship
i need to explain to her that having fancy clothes and being fashionable is not the whole world. i also want her to understand that she needs to stop copying my style and be herself

friendship
my friend and i need to teach our other friend a lesson about the real world but everytime we try and explain these things to her, she doesnt understand and feels a little insulted. any help on how to teach her a lesson without being mean??

4th grade
8+4 lattice math

4th grade
8+4 lattice math

4th grade
8+4

Maths
Write 7 july 2011 in 5 letters without using a word

Chem
How do you find the pH for 0.010M of HNO3?

math: precal
How do I find the zeros of a polynomial function?

trig
if cot of theta is less than zero, and csc of theta is less than zero what quadrant is theta in?

trig
if sin of theta is less than zero and cos of theta is greater than zero what quadrant is theta in?

trig
if csc of theta is greater than zero and sec of theta is less than zero what quadrant is theta in?

trig
if than of theta is greater than zero and cos of theta is greater than zero what quadrant is theta in?

physics
a fisherman's scale stretches 3.6 cm when a 2.7 kg fish hangs from it. what will be the amplitude and frequency of vibration if the fish is pulled down 2.5 cm more and released so that it vibrates up and down? i think the frequency is 2.63 Hz, but i don't know how to f...

physics
An elastic cord is 65 cm long when a weight of 75 N hangs from it but is 85 cm long when a weight of 189 N hangs from it. What is the “spring” constant k of this cord

history
was the gang of four the same as the group of jiang

math
find the area of the region described: shared by the cardiods r = 2(1+cos theta) and r = 2(1-cos theta)

chem
I can help you with (a) but the rest I can't. the answer is -68.5 To get this answer you need to subtract the H° of the reactants from the H° of the products. [(2*-467)+(-286)+(-393.5)]-[(2*-207)+(-1131)=-68.5

Math
To travel 175 miles, it takes Sue, riding a moped, 4 hours less time than it takes Doreen to travel 66 miles riding a bicycle. Sue travels 19 miles per hour faster than Doreen. Find the times and rates of both girls.

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