# Questions Asked onMay 6, 2018

1. ## Physics

An athlete with mass (m) running at speed (v) grabs a light rope that hangs from a ceiling of height H and swings to a maximum height of h₁. In another room with a lower ceiling of height H/2, a second athlete with mass 2m running at the same speed (v)

2. ## Chemistry

What is the boiling point elevation of a solution of NaNO3 (85.0 g/mol, complete dissociation) made by dissolving 10.0 g of NaNO3 into 200 g of water (Kb = 0.512◦C/m)?

3. ## Calculus

Oil flows into a tank according to the rate F(t)=(t^2+1)/(1+t), and at the same time empties out at the rate E(t)=(ln(t+7))/(t+2), with both F(t) and E(t) measured in gallons per minute. How much oil, to the nearest gallon, is in the tank at time t = 12

4. ## Chemistry

Which of the following compounds has the greatest molar solubility? A) AgBr, Ksp= 5.4 x 10^13 B) Ba3(PO4)2, Ksp = 3.0 x 10^-23 C) Al(OH)3, Ksp = 1.9 x 10^-33 D) MgF2, Ksp = 7.4 x 10^-11 E) Pb(OH)2, Ksp = 1.2 x 10^-15 I know the answer for this problem is

5. ## Calculus

A car travels along a straight road for 30 seconds starting at time t = 0. Its acceleration in ft/sec2 is given by the linear graph below for the time interval [0, 30]. At t = 0, the velocity of the car is 0 and its position is 10. What is the velocity of

6. ## chemistry

61.8g of A combines with 80g of B.30.9g of A combines with 106.5g of C, B and C combine to form compound CB2.atomic weight of C and B are respectively 35.5 and 66.6.show that the law of reciprocal proportion is obeyed.

7. ## math

(width:20, length:22, height:1) If the height of the tabletop was 2 inches instead of 1 inch, the surface area would increase by _____. 44 84 40 880

8. ## Maths

Make r the subject of formula t=2πr(r+h)

9. ## chemistry

The basicity of tetraoxosulphat(iv)acid is 2 explain this statement with an equation showing the reaction between the acid and potassium hydroxide

10. ## Math

Drawing at least one queen when you draw a card from a standard deck 5 timesâ€‹ (replacing the card each time youâ€‹ draw, so there are always 52 cards in theâ€‹ deck)

11. ## English 4

In the story Animal Farm how is the use of allegory as a rhetorical device different from simply laying out a non-fictional account, or an historical or statistical analysis of the period and the rise of the Communist Party? I would like an analysis of

12. ## Maths

Locus of the tip of an oscillating pendulum

13. ## Chemistry

A little confused on this question... I think I would need to take the solute and put it over the solvent, and then use molar mass. Confused on how density plays into this problem. Sucrose is very soluble in water. At 25ºC, 211.4 grams of sucrose will

14. ## Math

A grocer bought 300 pounds of bananas at 30 cents per pound. Experience at this store indicates that, as a result of aging, 30% of the bananas are sold at 80% of cost and another 10% are discarded. At what price per pound must the top-quality bananas be

15. ## Math

Can lotto be win mathematically? If yes what is the formula to produce genuine Numbers

16. ## History

what were the four leading causes to the great depression

17. ## Calculus

A particle moves along a curve so that its position at time t is given by the position vector . What is the particle's speed at time t = 1? I think it is 12.

18. ## math

After leaving a platform, the velocity with which a diver enters the water is directly proportional to the square root of the height of the platform. When a diver jumps off a 10-meter platform, they will strike the water at 46 feet per second. In Acapulco,

19. ## english

In the story Animal Farm how is the use of allegory as a rhetorical device different from simply laying out a non-fictional account, or an historical or statistical analysis of the period and the rise of the Communist Party? Answer: Within an allegory

21. ## Chemistry

The basicity of tetra oxtail phage(vi) acid is 2. Explain this statement with an equation showing the reaction between the acid and potassium hydroxide.

22. ## english

In the story Animal Farm how is the use of allegory as a rhetorical device different from simply laying out a non-fictional account, or an historical or statistical analysis of the period and the rise of the Communist Party? I am completely lost on this

23. ## math

Blossom’s Flowers purchases roses for sale for Valentine’s Day. The roses are purchased for \$10 a dozen and are sold for \$20 a dozen. Any roses not sold on Valentine’s Day can be sold for \$5 per dozen. The owner will purchase 1 of 3 amounts of roses

24. ## Math

Find all vectors v in 2 dimensions having ||v ||=5 where the i -component of v is 3i vectors:

25. ## Math

Find a unit vector u in the direction opposite of ⟨−3,−9,−9⟩.

26. ## Math

For the sequence 0,3,8,15,24; Write the general term (an equation) for the nth term of this sequence I got tn=n^2-1. Is this correct??

27. ## Math

A property management company furnishes skilled help to maintain apartment complexes. If employees are paid \$16 per hour and the company wishes to maintain a 30% markup based on the employees’ hourly pay, what hourly rate should it bill property owners?

28. ## Math

Assume you own a sporting goods business. Find the selling price for a tent costing \$387, based on a 25% markup on selling price. \$387/75% = \$516 can anyone tell me if this is correct?

29. ## Maths

The angle of elevation of the top of a tower fron a point 42m away from its base on level ground is 36degree.find the height of the tower.NOTE:no calculation only scale drawing

30. ## Math

a)A man swims northeast at 5mph. Give a vector representing his velocity b)He now swims a river the same velocity relative to still water; the river's current flows north at 1.2 mph. What is the velocity relative to the riverbed?

31. ## Physics

Getting my head twisted around by the wording of these two questions, any help would be appreciated. My answers/ideas are below each question. 1) Brieﬂy explain whether there would there be more or fewer conﬁgurations available for the gas if the

33. ## History

What are 3 main events that led to the stock market crashing in 1929?

34. ## Math

Danielle will use the instructions in the box below to make a cleaning solution "Add 13 cups of water to every 2 cups of concentrated cleaner" Which of the following proportions can be used to find W, the number of cups of water Danielle will add to 5 cups

35. ## Math

Yep, another math question! The slope of a line passing through H ( -2, 5) is -3/4, which ordered pair represents a point on the line? A: (6, -1) B:(2, 8) C: (-5, 1) D:(1, 1) No graph was with the question btw. I tried making a coordinate plane myself and

36. ## Math

M varies directly as the square of N. If N increases by 10%, find the percentage change in M

37. ## Maths

If k>0 and the product of the roots of equation x to power 2-3kx+2e power 2logk-1=0 is 7 then sum of roots is?

38. ## Math

t) Let a , b , c and y be the three dimensional vectors a =4j +2k ,b =−3i +4j +4k ,c =3i −j ,y =8i −7j Perform the following operations on these vectors: (a) c⋅a +a⋅y = (b) (a ⋅b )a = (c) ((c⋅c)a )⋅a =

39. ## Algebra

Solve Using Quadratic Equation 5r^2 = 2r + 1

40. ## Calculus

If f is a vector-valued function defined by then what is f '' (pi/4)? I think it is .

41. ## Math

So i have to find the first 5 terms of each sequence; 2^x-1. Would I start at 0? I mean is 0 a natural number

42. ## Math

Solve the equation and show the check of the potential answer(s). If any answers are excluded values, state this on your answer sheet. a2 + 4a - 5/a2 + 2a - a + 3/a + 2 =1/a2 + 2a Can someone please show me how to do this problem with checks? I have

43. ## Math

A car traveling from town A to town B at an average speed of 80 km/h took 54 minutes. Another car took 40 minutes to travel the same distance. What was the difference in their speed in km/h?

44. ## History

I am doing a History project and i need to know ranked 1 to 8, 8 most influential people of the 20's and 30's

45. ## Math

Can someone help me with a formula for this? A container ship left the Azores and traveled north. An aircraft carrier left two hours later traveling 5 km/h faster in an effort to catch up to it. After eight hours the aircraft carrier finally caught up.

46. ## Physics

So I have worked out the 'allowed' configurations for four particles which can occupy 5 different energy levels (1, 3, 5, 7, 9) and now I need to work out the average number of particles in a particular energy level (i.e 3). 1) 9,5,1,1 2) 9,3,3,1 3)

47. ## History

I need to make a timeline for the great depression. I need four lead up events to the stock market crash, then after that happens, i need four response events on how they responded to everything falling apart.

48. ## Math

Sports Haven keeps an inventory of FITBIT Wearable Technology. Assume an inventory of 35 FitBits at the beginning of the year at a cost of \$44.32 each. Additional FitBits were purchased as follows: 15 at \$45.50 each on March 22, 30 at \$45.80 each on May 2,

49. ## algebra

Solve the following inequality. Yuur answer show be enter with the variable on the the left side of the inequality. ( i.e. x< 1000) In part I you will enter your boundry point. In part II you will enter L for less than and G for greater than. 5x + 4< 39

50. ## Physics

Derive the coefficient of surface tension of mercury

51. ## Physics

Derive the coefficient of surface tension for water

52. ## Math

Compute the angle between the vectors i −j +k and −i −j −k . angle=

53. ## Math

A printer takes 50 minutes to print a total of 1200 identical black-and-white posters and 500 identical coloured posters. The same printer takes 1 hour to print 2400 such black-and-white posters. How many such coloured posters can the same printer print in

54. ## Math

The force on an object is F =−21j . For the vector v =4i −j , find: a) The component of F parallel to v : (b) The component of F perpendicular to v : The work, W, done by force F through displacement v :

55. ## Physics

Please who can help me out. Derive the coefficient of surface tension for water

56. ## Physics

Someone please.... Derive the coefficient of surface tension for mercury

57. ## algebra

Simplify the expression: 4 times Start Root 18 End Root plus 5 times Start Root 32 End Root

58. ## History

who are the most influential people of the 1920's or 1930's Canadians

59. ## Math

Javier has a worm business in which he buys night crawlers from younger kids for 4 cents each and sells them for \$1.25 per dozen. What is the percent markup on cost, to the nearest tenth of a percent? a. 160.4% b. 61.6% c. 96.8% d. 3.025%

60. ## Math

Which of the following vectors are parallel? u=2i+4j-2k, v=i-j+3k w=-i-2j+k, p=i+j+k q=4i-4j+12k, r=i-j+k