# Questions Asked onMay 24, 2018

1. ## Physics

The vector sum of two vectors of magnitude 10 units and 15 units can never be A) 28 units B) 22 units C) 18 units D) 8 units

2. ## Physics

Water of mass 120g at 50°c is added to 200g of water at 1 0°c and the mixture is well stirred . calculate the temperature of the mixture .(neglect heat losses to the surrounding)

3. ## Math

Susan gave 1/3 of a pizza to her brother. She gave 1/2 of what was left to her mother. Susan ate the rest herself. What fraction of the pizza did susan eat?

4. ## Algebra

what is the equation of the hyperbola given that the perimeter of the central rectangle is 44 units and its vertices are (7, 0) and (-7, 0)

5. ## Algebra

The ratio of the length to the width of a golden rectangle is (1 + √(5):2:.The dimensions of a garden form a golden rectangle. The width of the garden is 12 feet. Find the length L of the garden. Round your answer to the nearest foot.

6. ## Math

You invest \$500 at an annual interest rate of 6.75% compounded continuously. How long will it take y our money to double?

7. ## Physics

A ray of light is incident at an angle of 30° on a glass prism of refractive index 1.5 . calculate the angle through which the ray is minimally deviated in the prism.(the medium surrounding the prism is air)

8. ## Chemistry (PLZ HELP)

1. Outline a procedure to prepare an ammonia/ammonium buffer solution. I'm confused how to start it off. This is an outline of how the steps should be: Step One - Calculate the concentration of hydronium ions in the solution that requires buffering. You

9. ## Chem

What is the pKb of Formate ion? 0.64M ........... 8.77 pH Help!! I'm not sure how to calculate this... I know to use the Kb formula but I'm not sure where to plug the numbers in.

10. ## English

1. We are discussing the matter later. 2. We will discuss the matter later. 3. We are gling to discuss the matter later. 4. We discuss the matter later. ============================== Are they all the same in meaning? Any differences?

11. ## math

1. (-10x^3 + 30x -20) divided by (-5x+5)? a)2x^2-2x+4**** b)-2x^2-2x-4 c)-2x^2+2x+4 d)2x^2+2x-4 2.The width, w, of a rectangular playground is x + 3. The area of the garden is x^3 - 7x + 6. What is an expression for the length of the playground? a.) x^2 -

12. ## math

A theater has 22 seats in the first row, 25 seats in the second row, 28 seats in the third row, and so on. How many seats are in the Fifteenth row?

13. ## Physics

Moving a magnet back and forth inside a coil of wire induces a current. How does the speed of the motion affect the magnitude of the current? Can someone please help me with this?? It would be much appreciate!! (=

14. ## Algebra

Volume and surface area are often compared by manufacturers in order to maximize how much of something can go inside of a package (volume) while keeping how much material is required to create the package (surface area) low. Pick a product that might be

15. ## Math

A hollow metal pipe has an external radius of 5cm and an internal radius of of 4.5cm. If the pipe is 1m long, find the volume of the metal used to make the pipe. I am really confused how to begin to solve this, can someone help please?

16. ## Educational technology

1. Which of the following is an example of tangible property? A a method for creating ice cream that your friend. B*** an idea for an invention that your dad mentioned briefly but did not write down C song lyrics printed into a song book D a quicker system

1. Find the modulus and argument of the following complex numbers, and write them in trigonometric form: a. 5 – 8i Answer = Sqrt{89} ( cos (-1.01219701) + i sin ( -1.01219701)) b. –1 – i answer = Sqrt2 (cos (5pi/4) + i sin (5pi/4)) c. –5 + 12i

18. ## Math

Karaoke is x years old and two years older than his wife. In ten years’ time he will be 3 times as old as his daughter. What will be their total age then?

19. ## Science

Sunlight, wind, and running water are essentially “free.” Yet renewable energy sources are a very small part of our energy consumption. Why is this? Explain.

20. ## math-- check my answers!

You are in "Car Parts USA" buying some headlight bulbs. The original price is \$19.99, but you have a coupon for \$6.00 off. What is your subtotal for the bulbs? \$13.99 *** \$24.99 \$17.85 You are at a convenience store picking up some iced tea. You see that

21. ## Science

So I need help with a lab, I'm not looking for answers, I want to know if my answers make sense, so this is the pre lab introduction: In a series circuit, electrons travel along a single pathway. The movement of the electrons through the circuit produces

22. ## Ela

Which statement is an opinion? Marco Polo noticed everything from the clothes the people wore to the food they ate. Once in China, the Polos arrived at the palace of the powerful emperor Kublai Khan. It is likely that Marco Polo thought he had seen the

23. ## Math

4. Find the indicated roots of these complex numbers. a. 3√1 = 1? b. sqrt{- 3 - 4i} c. 4sqrt{81cis60°} d. 5sqrt{32cis (pi/6)}

24. ## English

1. Let's wrap up this lesson. 2. Let's finish this lesson. 3. Let's summarize this lesson. =========================== What does #1 mean? Does #1 mean #2 or #3?

25. ## Science

What is a primary energy source? Explain how it differs from a secondary source.

26. ## Algebra

Suppose you are having a birthday party at the local bowling alley. You are trying to figure out how many people you can afford to invite. b. How much money are you willing to spend? c. Set up an equation that shows the inverse relationship between the

27. ## Chemistry

Explain why a model of the atom is crucial to understanding chemistry and in explaining the behavior of matter.

28. ## Chemistry

If an element has 12 protons and 17 neutrons, how many electrons does it have? I think the answers twelve but I'm not sure?

29. ## Chemistry

What is the electron configuration of the element with 27 protons? Is it 1s2 2s2 2p6 3s2 3p6 3d7 4s2 or is that wrong?

30. ## Algebra 1

Solve each compound inequality. -1-10a

31. ## History/Social Studies

Hi, can I please have a link? I don't like cheating on essay questions. Thanks!! What are the causes of problems the Mayas and other Native American groups face in Guatemala? How are people trying to solve these problems?

32. ## Math

The cash price of a T.V. set was sh 22000. Maria bought the T.V. set on hire purchase terms. She was allowed to pay a deposit equal to 40% of the cash price and eight equal monthly installments of sh 2800. How much more money did she pay than the cash

33. ## math

Justin writes the letters Illinois on cards and then places the cards in a hat what is the probability of picking an n

34. ## math/ sociology

Describe an example of a graph where adding a single edge can increase the size of the largest strongly connected component by at least 1,000 nodes. Clearly, you don't need to draw the full graph rather, you should describe it in words.

35. ## Chemistry

An aqueous sodium salt (NaCnH2n+1O3) solution has an osmotic pressure of 2.041 atm when 1.068 g of the salt are dissolved in 200. g of water at 25 degrees C. Assuming molality and molarity in such a dilute solution are the same and that the sodium salt is

36. ## Chemistry

28. Explain, in terms of equilibrium shifts, how this buffer mixture resists changes in pH when small quantities of both a strong acid and a strong base are added. The buffer mixture was made up of: monosodium phosphate(NaH2PO4) and disodium phosphate

37. ## English-The Great Gatsby

What is Fitzgeralds message to the reader about women and feminine power?

How many minutes does it take to produce 10.0L of oxygen gas (at standard conditions) by electrolyzing neutral water with a current of 1.3 A? What is the corresponding volume of hydrogen gas produced? thanks so much

39. ## Math

What is the rectangular form(a + bi) of: 1. 5 cis(255°) 2. sqrt3 cis (11pi/6)

Sales tax is a tax calculated on ______________. the subtotal your income the total To find the total amount you are going to pay, you would _______________. multiply by the sum of one and the sales tax rate multiply by the sales tax rate 2.

41. ## calc

Suppose the integral from 2 to 10 of g of x, dx equals 10 and the integral from 8 to 10 of g of x, dx equals negative 6, find the value of the integral from 2 to 8 of one-half times g of x, dx .

42. ## Chemistry

HCHO2 = 1.77 * 10^-4 If the concentration of formic acid (HCHO2) is 1.24 M, what is the concentration of H30+ in the solution?

43. ## Geometry

A grid shows the positions of a subway stop and your house the subway stop is located at (-3,6) and your house is located at (-7,2) what is the distance to the nearest unit between your house and the subway stop Answers 6 11 9 13

44. ## Geometry HELPP

in the rhombus, m

45. ## English Research Paper *Edit*

What does everyone think of these questions: What are the positive effects music has on the mind? Can those positive effects change a mindset on something / the way you think? Can music calm the mind? After a bad day, or even deescalate a situation. How

46. ## Language Arts

Hello, I need help with my LA Sample Work I have to write a Conclusion but I don't know how to can someone please help me? Thank You, Unknown

47. ## ELA

john believed he was right, he was very _____ about it A: Pompous B: hardheaded C:smug D: assure

48. ## algebra

An airplane has an airspeed of 300 mph, and it is traveling to the southwest. After two hours it is 282.9 miles from its starting point, at a compass heading of 228.6° from the starting point. what is the speed and direction of the wind?.

49. ## Alegbra

What are the polar forms of these rectangular equations? a. y = 5 b. (x – 1)^2 + y^2 = 1 c. 5x + 4y = 2

50. ## algebra

1. What are the next three terms in the sequence? –6, 5, 16, 27, … (1 point)

51. ## chem

1. What does it mean when it says to: pour less than 10 mL of 6 M HCl into the beaker? What's the conversion for this?

52. ## English

1. I run 50 meters in 9 seconds. 2. I run for 50 meters in 9 seconds. [Are both okay? Which one is commonly used?] 3. I sleep 7 hours a day. 4. I sleep for 7 hours a day. 5. I sleep 7 hours every day. 6. I sleep for 7 hours every day. [Are they okay? Which

53. ## Sociology

Briefly define “social role” and provide an example from your own life that illustrates how social roles change in different contexts.

Which of the following elected officials introduce laws in Congress that may become national laws? U.S. representative or senator Governor of Arkansas State representative or senator Mayor **

55. ## Math

How are these solved? 1. cosx+1=0; x ∈ R 2. 4sin^2 x - 1 = 0; x ∈ R 3. 2cos^2 x + 3cosx + 1 =0;0 ≤ x < 2π

56. ## Trigonometry

Given that sin(2/(√229))and that 0∘0∘ < θθ < 90∘90∘, with the aid of a diagram and without the use of a calculator determine: a) cosθcos⁡θ = b) tanθtan⁡θ = c) tanθ÷cscθtan⁡θ÷csc⁡θ = d) sinθ÷cosθsin⁡θ÷cos⁡θ = e) tanθ

57. ## Algebra (Final)

I know my answer, but I stumbled on it accidentally. I want to know exactly HOW to get my answer. The question states: In a geometric sequence, a1=12 and r=(sqrt)2. What is the approximate sum of the first 20 terms of the sequence?

58. ## Math

The price of a pair of jeans decreases from \$45 to \$40. What is the approximate percentage of decrease?

59. ## Math

externalfile:drive-2408f996220908404fd73a28cf7f7ec25690d912/root/Unsorted Items/Screenshot 2018-05-24 at 4.31.49 PM.png Which one is it?

60. ## Angular acceleration

A racing car accelerates from 50 km per hour to 200 km per hour in 3.0 seconds along a straight track, and the acceleration is constant during this period. If the axles are 40 cm above the road, what is the magnitude of the angular acceleration of the

61. ## Math

what are the indicated powers of these complex numbers: a. (2 – 3i )^2 b. (3 + 4i )^3 c. [2 cis(300°)]^5 d. ( cos (4pi/3) + i sin (4pi/3)) ^4

62. ## Chemistry

I am given the following information: Lactic acid................0.025M...................pH 2.74 How do I calculate the pKa? I don't know how to do it without the concentration. Help please!

63. ## math

A swimmer is swimming across a river that is exactly one mile wide, and the river current is 1.5 mph directly south. If the swimmer can swim through still water at 2.5 mph, and he swims east, perpendicular to the north-south bank, how far downstream will

64. ## math

why1\7 is greater than 1\10

65. ## Physics

A ray of light is incident at an angle of 30° on a glass prime of refractive index 1.5 . calculate the angle through which the ray is minimally deviated in the prime.

66. ## social studies

what city is closest to 34 north and 81 west.

67. ## math:)

Vector u is represented by the directed line segment RS and vector v is represented by the directed line segment OP. If R=(8,-2), S=(11,-6), O=(-3,-9), and P=(0,-13), are u and v equal? Explain how you reached your answer.

68. ## Chemistry

What parts of Dalton’s atomic theory no longer agree with the current picture of the current picture of the atom? Provide an answer using at least 3 to 4 complete content related sentences in your own words.

69. ## Chemistry

Perform this operation and report the answer to the correct number of significant figures: What is the mass of a cube of aluminum that is 4.0 cm on each edge? The density of aluminum is 2.7 g/cm3. Show all calculations leading to an answer.

70. ## Chemistry

Why are the atomic masses of elements usually decimal numbers?

71. ## math-- one question

Suppose we know that we need \$36,000 of realized income each year to cover all of our expenses. What is the minimum amount we should make per hour if we know we can work at a job at least 38 hours per week.

72. ## Math

A vendor borrowed \$7,500 from their cooperative at 8% a year. If he paid at the end of 1 1/2 years, how much in all did he pay? I am not sure if the answer is \$8,400

73. ## Math

An airplane has an airspeed of 300 mph, and it is traveling to the southwest. After two hours it is 282.9 miles from its starting point, at a compass heading of 228.6° from the starting point. what is the speed and direction of the wind?.

74. ## Chemistry

What is the electron configuration of the element with 27 protons?

75. ## Language

How would I cite "A surprising point of view" in MLA formatting? I have 0 idea who the author is... please help.

76. ## Math

A hanging spring is compressed 3 inches from its rest position and released at t = 0 seconds. It returns to the same position after 0.8 seconds. Find: a) the amplitude of the motion b) the period of the motion c) the frequency of the motion