# sana

Most popular questions and responses by sana
1. ## 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.

2. ## 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?

3. ## Math

Brian buys a package of one-inch 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?

4. ## 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

5. ## 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

6. ## 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

7. ## 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?

9. ## 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

10. ## 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

11. ## 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

12. ## 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

13. ## maths

What is the nth term rule of the linear sequence below? 27,25,23,21,19

14. ## 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

15. ## 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

16. ## math

the game of the euchre uses just 9s,10s,jacks,queens,kings and aces from a standard deck of 52 cards. how many five-card euchre hands have all black cards. is the right answer 495 ways which i got by doing 12C5 x 40C0 = 495 ways

17. ## mechanics

A man begins to climb up a 12-ft 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

18. ## physics

Consider the Sun to be at the origin of an xy-coordinate system. A telescope spots an asteroid in the xy-plane 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

19. ## Maths

Joe has some pocket money. He spends a fifth of it. He has then £2 left. How much pocket Money did he have?

20. ## 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

21. ## physics

if the distance between two bodies is increased by 25% then % change in the gravitational force is

22. ## 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

23. ## 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

24. ## 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

25. ## math (data management)

How many n-digit decimal sequences (using digits 0-9) 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

26. ## Biology

write a paragraph describing the importance of dna to science, medicine, and all living organisms

27. ## 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

28. ## math

what is one-half added to 2 sixths?

29. ## 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

30. ## Math

128,955 round each number to the place of underlined digit

31. ## physics

A partly-full 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

32. ## 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?

33. ## 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 :)

34. ## 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

35. ## english

i need help picking the right theme A)oppression B)discrimination C)obstacles D)injustice plz asap thankyou

36. ## Math

one-third of lexie's age is 4 years more than one-fifth of this age. lexie's sister is five years younger than her. how old is lexie's sister?

37. ## math

the diameter of scooter wheel is 4cm. how far will the scooter have travelled after 450 revolutions of the wheel?

38. ## math

Differences between the external angle and n-1 sides regular polygon and n+2 side regular polygon is 6 degree then what is the each external angle

39. ## 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?

40. ## 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?

41. ## 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

i need help understanding the book "we are all welcome here" by Elizabeth Berg. plz help will appreciate the help

43. ## 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

44. ## math

Elesia ets 9 bananas 4 apples and 9 mangoes a week.How many mangoes does she eat in 8 weeks

45. ## 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

46. ## 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.

47. ## 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.

48. ## physics

750km towards North West?

49. ## Math

a simple Model (model 1)of distance,d meters,fallen in time t seconds by free-fall 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^2-0.1t^2.sketch a graph of this function

50. ## physics

explain why carrots look orange?

51. ## physics

explain why carrots look orange

52. ## physics

explain why carrots look orange

53. ## 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 ?

54. ## 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?

55. ## 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

56. ## physics

calculate the friction force of an object? if weight=19600,vi=30ms-1,vf=0ms-1 and S=100m.

57. ## math

what is the sum of 4xdollers and 4x cents?explain your answer in cents

58. ## math

given the digits {1,1,2,5,5,5,6,7} how many even numbers less than 5 000 000 are there?

59. ## 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 )

60. ## 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)

61. ## 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?

62. ## 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)

63. ## Science

What is the effect of increasing "dead space" ?

64. ## plz correct this line ..eng

but his purity is not last long as he start growing

65. ## 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

66. ## MATH

what is the GCF 16 and 40

67. ## english

can u edit this and add a little more plz like 2-3 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

68. ## english

what is the historical context of the book "we are all welome hear"Which takes place in 1964 ?

69. ## 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!!!!! :) :) :)

70. ## 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?

71. ## 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?

1. ## Biology

I think its d but I am not sure

posted on April 25, 2019
2. ## Chemistry

4) 1 Mm/1nm

posted on March 1, 2019
3. ## english

😂😂😂😂

posted on January 15, 2019
4. ## english

thanksssss yeeeeeet

posted on January 15, 2019
5. ## english

yeeeet

posted on January 15, 2019
6. ## English

i agree

posted on January 14, 2019
7. ## Math

I need the explanation for it

posted on January 9, 2019
8. ## English

but its December almost February

posted on December 24, 2018
9. ## English

you did this on my bday

posted on December 24, 2018
10. ## english

sooo......... which one is right

posted on December 24, 2018
11. ## math

Selling price=CostPrice+Gain

posted on February 9, 2018
12. ## math

30

posted on June 1, 2017
13. ## math

40

posted on January 14, 2017
14. ## Math algebra

distributive

posted on December 17, 2016
15. ## probability

6/200=3/100

posted on December 17, 2016
16. ## Math

361

posted on November 1, 2016
17. ## Econ

14.32-3.23 = 11.09 11.09 divided by 3.23 = 3.4 multiply by 100 = 350 %

posted on November 30, 2015
18. ## statistics

1.936

posted on October 13, 2015
19. ## 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
20. ## math

2x0=0 2x1=2 2x2=2 2x3=6

posted on August 20, 2014
21. ## 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
22. ## algebra

100/9

posted on August 6, 2013

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
24. ## 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
25. ## 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
26. ## physics

Could u rewrite the eqn that you used for C2

posted on March 6, 2012
27. ## math

dimond

posted on June 17, 2011
28. ## Speech Class

hmmmmm!!!!!i hate studys cause the book makes a child's brain damage

posted on April 30, 2011
29. ## MATH

thanx

posted on February 24, 2010