sana
Most popular questions and responses by sana
Chemistry
Consider the equation A(aq) + 2B(aq) 3C(aq) + 2D(aq). In one experiment, 45.0 mL of 0.050 M A is mixed with 25.0 mL 0.100 M B. At equilibrium the concentration of C is 0.0410 M. Calculate K.
asked on February 16, 2014 
Math
a coin was tossed and a spinner with three equal sections numbered 1 to 3 was spun. what is the experimental probability that the next toss and spin will result in 3 and Tails?
asked on January 19, 2017 
Math
Brian buys a package of oneinch square tiles. He wants to make a mosaic picture 5 inches long and 4 inches wide. Does he have enough tiles? If so, how many more will be left over?
asked on March 20, 2017 
chem
) Which of the following should dissolve the smallest amount of silver sulfide per liter, assuming no complex formation? A) 0.1 M HNO3 B) 0.1 M Na2S C) 0.1 M AgNO3 D) 0.10 M NaNO3 E) pure water
asked on February 22, 2011 
mechanics
Two skaters, each of mass 70 kg, skate at speeds of 4 m/s in opposite directions along parallel lines 1.5 m apart. As they are about to pass one another they join hands and go into circular paths about their common center of mass. A third skater is skating
asked on December 6, 2015 
mechanics
A string is wound around a uniform disk of radius R and mass M. The disk is released from rest when the string is vertical and its top end is tied to a fixed bar. (a) Draw a free body diagram indicating all the forces acting on the disk. (b) Calculate the
asked on December 9, 2010 
Maths
there is a total of 464 students going on the trip.they will be travelling to the trip on a bus and each bus has seats for 45 people. how many buses will be needed for all the students?
asked on December 11, 2018 
English
Why is it important that canada produce value added products?
asked on February 11, 2012 
mechanics
Two planets, X and Y , travel counterclockwise in circular orbits about a star, as shown in figure below. The radii of their orbits are in the ratio 3 : 1. At some time, they are aligned as in the figure, making a straight line with the star. During the
asked on December 9, 2010 
English
Please check this paragraph.please. Wrongdoing and wickedness are as old as first man born in the world. These problems are so great that man cannot cope with it himself. Man can not escape way from wrongful act and the bad conscience without the help of
asked on October 21, 2010 
Biology
I need help A virus kills its host cell at the end of a. Conjugation b. The formation of a prophage c. Assembly of the capsid d. A lytic cycle
asked on April 25, 2019 
maths
Suppose there are 10 coins laid out in front of you. All of the coins are fair (i.e. have an equal chance of heads or tails) except one, which flips to heads every time. You draw one coin at random and flip it 5 times. If each of the 5 flips results in
asked on March 26, 2013 
maths
What is the nth term rule of the linear sequence below? 27,25,23,21,19
asked on April 26, 2019 
statistics
A researcher finds that two continuous, random variables of interest, X and Y, have a joint probability density function (pdf) given by: f(x,y)={cxy 0
asked on November 13, 2014 
maths
If the point A(1,2), B(2,3), C(3,2), and D(4,3) are vertices parallelogram ABCD, then taking AB as the base , find the height of this parallelogram
asked on March 2, 2013 
math
the game of the euchre uses just 9s,10s,jacks,queens,kings and aces from a standard deck of 52 cards. how many fivecard euchre hands have all black cards. is the right answer 495 ways which i got by doing 12C5 x 40C0 = 495 ways
asked on January 6, 2012 
mechanics
A man begins to climb up a 12ft ladder . The man has mass 80 kg, while the ladder has mass 10 kg. The wall against which the ladder rests is very smooth, which means that the tangential (vertical) component of force at the contact between ladder and wall
asked on December 6, 2015 
physics
Consider the Sun to be at the origin of an xycoordinate system. A telescope spots an asteroid in the xyplane at a position given by (1.8 1011 m, 3.1 1011 m) with a velocity given by (8.4 103 m/s, 6.3 103 m/s). What will be the magnitude of the
asked on March 6, 2012 
Maths
Joe has some pocket money. He spends a fifth of it. He has then £2 left. How much pocket Money did he have?
asked on October 21, 2014 
physics
two mice are racing to a hunk of cheese.mouse a was between mouse b and the cheese.mouse a started 8.68 meters from mouse b, but "x"meters away from the cheese.both mice traveled at the same velocity,which were 1.43 m/s and started at the same time.it took
asked on September 25, 2011 
physics
if the distance between two bodies is increased by 25% then % change in the gravitational force is
asked on March 18, 2016 
mechanics
A wad of sticky clay of massmand velocity vi is fired at a solid cylinder of massM and radius R. The cylinder is initially at rest and is mounted on a fixed horizontal axle that runs through the center of mass. The line of motion of the projectile is
asked on December 9, 2010 
mechanics
Q2. A block of massmrests on the left edge of a block of larger massM. The coefficient of kinetic friction between the two blocks is , and the surface on which the larger block rests is frictionless. A constant horizontal force of magnitude F is applied
asked on December 9, 2010 
Act sps
the ratio of the sum to terms p and q terms of an a.p. is psquare:qsquare. prove that the common difference of the a.p. is twice the first term
asked on August 16, 2017 
math (data management)
How many ndigit decimal sequences (using digits 09) are there with k 1s? I'm not entirely sure what you question is asking, but I'll take a guess. You have n digits and k 1's with k
asked on October 15, 2006 
Biology
write a paragraph describing the importance of dna to science, medicine, and all living organisms
asked on January 29, 2012 
math, algebra
2a+2ab+2b I need a lot of help in this one. it says find two consecutive positive integers such that the sum of their square is 85. how would i do this one i have no clue i know what are positive integers.but i don't know how to figure this out. Let n be a
asked on January 26, 2007 
math
what is onehalf added to 2 sixths?
asked on October 21, 2014 
mechanics
Q3. A skeet (a small disc) of massM is fired at an angle to the horizontal with a speed v0. When it reaches the maximum height it is hit from below by a pellet of mass m (m < M) traveling vertically upward at a speed of v. The pellet is embedded in the
asked on December 9, 2010 
Math
128,955 round each number to the place of underlined digit
asked on September 19, 2017 
physics
A partlyfull paint can has 0.40 gallons of paint left in it. (a) What is the volume of the paint, in cubic meters? (b) If all the remaining paint is used to coat a wall evenly (wall area = 11 m2), how thick is the layer of wet paint? Give your answer in
asked on February 24, 2014 
physics
1) A car, initially traveling with a uniform velocity, accelerates at a rate of 1.0 m/s2 for a period of 12.0 seconds. If the car traveled 190.0 m during this 12.0 second period, what was the velocity of the car when it started to accelerate?
asked on February 10, 2013 
writing
My son is 3yrs and 6months old he is facing problem in writting small alphabets would u plz help me ,how i teach him :)
asked on December 9, 2011 
English
Please correct this paragraph. please.. there is no flow in the second paragraph .plz help It is a very interesting and funny story. The writer of the story Francois Rabelais tells us about the adventure of the two giants, Gargantua and Pantagruel in
asked on November 4, 2010 
english
i need help picking the right theme A)oppression B)discrimination C)obstacles D)injustice plz asap thankyou
asked on January 3, 2010 
Math
onethird of lexie's age is 4 years more than onefifth of this age. lexie's sister is five years younger than her. how old is lexie's sister?
asked on January 4, 2017 
math
the diameter of scooter wheel is 4cm. how far will the scooter have travelled after 450 revolutions of the wheel?
asked on January 26, 2016 
math
Differences between the external angle and n1 sides regular polygon and n+2 side regular polygon is 6 degree then what is the each external angle
asked on June 15, 2014 
physics
a bowler releases her bowling ball at 425.36 cm/s.it decelerates towards the pins at 4.8 cm/s^2.the length of a bowling alley is 60ft.what velocity did the ball hit the pins and how long did it take to get there?
asked on September 25, 2011 
physics
superman flies to a meteor traveling at 440km/hr.superman slows it down at a rate of 24.8m/s^2.how long before the man of steel stops the meteor?how far did he travel with the meteor?
asked on September 25, 2011 
English
Dear teachers ... please read this paragraph .i know it if full of error but plz help me. I particularly liked Erasmus view that people should not care if other humans hiss at them as long as they applaud themselves. I love the idea that it is a good to
asked on October 28, 2010 
10th grade
i need help understanding the book "we are all welcome here" by Elizabeth Berg. plz help will appreciate the help
asked on January 1, 2010 
Chemistry
Suppose you mix 20kg of oxygen is used to burn 20kg of wood. Energy is given off as heat and light. If all the ashes and gases are collected , how would the mass compare with that of the orginal substance? Explain your answer. I have no clue what the
asked on February 18, 2009 
math
Elesia ets 9 bananas 4 apples and 9 mangoes a week.How many mangoes does she eat in 8 weeks
asked on February 21, 2008 
Science
I don't noe ne thng about fluids. HELp..my test is in two days If you repost your question and spell the words right, I'll help you. lol pwnT
asked on January 30, 2007 
Accounting
I find a lot of definitions on the internet, but still confused. What is difference between carrying value book value fair value fair market value market value value in use net realizable value Are some of these actually the same? Thanks.
asked on July 20, 2017 
Math
Find the compound interest on rs 64,000 for 1 year at the rate of 10% per anum compounded quarterly. Could you please do it fast I need to give it tomorrow.
asked on December 10, 2016 
physics
750km towards North West?
asked on May 20, 2015 
Math
a simple Model (model 1)of distance,d meters,fallen in time t seconds by freefall skydiver is d(t)=4.9t^2 a. sketch the model b. a different model (model 2) for the distance travelled by a skydiver is d(t)=4.9t^20.1t^2.sketch a graph of this function
asked on March 17, 2015 
physics
explain why carrots look orange?
asked on January 4, 2015 
physics
explain why carrots look orange
asked on January 4, 2015 
physics
explain why carrots look orange
asked on January 4, 2015 
physics
A car moves at a constant speed of 60 km/hr for 1 km and 40 km/hr for next 1 km. What is the average speed of the car ?
asked on January 1, 2015 
physics
If the athlete lies down on the ground on his back,his weight is spread over an area of 0.75 meter square. How much pressure does he exert on the ground in this position?
asked on November 21, 2014 
statistics
You want to set up a games stall at the Winter Wonderland. You have a single pack of 52 cards and decide to play card games with your customers. The game is designed as follows. A customer draws 4 cards at random. For every “Ace” that the customer
asked on November 13, 2014 
physics
calculate the friction force of an object? if weight=19600,vi=30ms1,vf=0ms1 and S=100m.
asked on January 7, 2013 
math
what is the sum of 4xdollers and 4x cents?explain your answer in cents
asked on July 22, 2012 
math
given the digits {1,1,2,5,5,5,6,7} how many even numbers less than 5 000 000 are there?
asked on January 5, 2012 
math
given the digits {1,1,2,5,5,5,6,7} how many even numbers less than 5 000 000 are there? (and plzzzzz tell me how u got it )
asked on January 4, 2012 
physics
jeff gordan traveled around a 1.5 mile track 300 times just bcause he felt like it.it took him 6.14 hours to complete the 300 laps.what was his total distance traveled?(1 mile=1.6093km)
asked on September 25, 2011 
physics
abe left his house at 10:14 and goes north 14.0 kilometers to school then and south 70.6 kilometers to the candy store,arriving at 10:57.what are his displacement,total distance,average velocity?
asked on September 25, 2011 
physics
a roller coster goes from 43 yards per hour to a stop in the station.it took 4.5 seconds to stop.what was the acceleration? (1yd=0.9144m)
asked on September 25, 2011 
Science
What is the effect of increasing "dead space" ?
asked on April 24, 2011 
plz correct this line ..eng
but his purity is not last long as he start growing
asked on October 21, 2010 
Englis
Dear teachers ,Please read this paragraph and fix the errors.please !!! Shahrazad is main character of the one thousand and one nights. She is a good story teller, a Psychiatrist, and a guru. She is a fearless woman, determined to safe her female gender
asked on October 17, 2010 
MATH
what is the GCF 16 and 40
asked on February 24, 2010 
english
can u edit this and add a little more plz like 23 lines plz in easy words, it is from the book we are all welcome here by elizabeth berg: Historically the work is significant because it gives us an insight of the horrors of the civil war, which asserted
asked on January 11, 2010 
english
what is the historical context of the book "we are all welome hear"Which takes place in 1964 ?
asked on January 11, 2010 
english
i need help findng the perfect theme and moral of the novel "we are all welcome here" by Elizabeth Berg As soon as possible Please Thankyou very much!!!!! :) :) :)
asked on January 3, 2010 
memo
hey i need to write a memorandum for one of my classes about a company...any ideas on what kinds of topics i could write about?
asked on October 3, 2008 
physics
a telephone engineer feeds a sound signal into the mouthpiece of a telephone.As part of the tests he is making he incresesthe frequency of the sound.HOW WILL THIS EFFECT TYE ELECTICAL SIGNAL PASSING ALONG THE TELEPHONE WIRE?
asked on October 25, 2007

Biology
I think its d but I am not sure
posted on April 25, 2019 
Chemistry
4) 1 Mm/1nm
posted on March 1, 2019 
english
😂😂😂😂
posted on January 15, 2019 
english
thanksssss yeeeeeet
posted on January 15, 2019 
english
yeeeet
posted on January 15, 2019 
English
i agree
posted on January 14, 2019 
Math
I need the explanation for it
posted on January 9, 2019 
English
but its December almost February
posted on December 24, 2018 
English
you did this on my bday
posted on December 24, 2018 
english
sooo......... which one is right
posted on December 24, 2018 
math
Selling price=CostPrice+Gain
posted on February 9, 2018 
math
30
posted on June 1, 2017 
math
40
posted on January 14, 2017 
Math algebra
distributive
posted on December 17, 2016 
probability
6/200=3/100
posted on December 17, 2016 
Math
361
posted on November 1, 2016 
Econ
14.323.23 = 11.09 11.09 divided by 3.23 = 3.4 multiply by 100 = 350 %
posted on November 30, 2015 
statistics
1.936
posted on October 13, 2015 
life orientation
It can lead to the pressure of looking cool and u can get addicted to smoking ,drugs etc. Also, you can have a feeling of wearing expensive clothes, accessories to impress which is stressful and not necessary
posted on February 25, 2015 
math
2x0=0 2x1=2 2x2=2 2x3=6
posted on August 20, 2014 
Biology
Comparing the pairs of elements listed below, choose the pair in which both atoms have nuclei with the same number of neutrons. 2311Na and 2412Mg 73Li and 94 Be 3216S and 5425Mn 147N and 168O
posted on February 2, 2014 
algebra
100/9
posted on August 6, 2013 
business
here are the right answers B D C A B D C C B C A C D B D D C B A C D B A A B
posted on June 22, 2013 
Management
These are all correct answer I just passed this exams got 100 marks its guaranteed answers all 100 percent coorect .
posted on June 18, 2013 
Management
A D A B A C B C A D C B D A B C D C B C D A A C A
posted on June 18, 2013 
physics
Could u rewrite the eqn that you used for C2
posted on March 6, 2012 
math
dimond
posted on June 17, 2011 
Speech Class
hmmmmm!!!!!i hate studys cause the book makes a child's brain damage
posted on April 30, 2011 
MATH
thanx
posted on February 24, 2010