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Popular questions and responses by Someone
1. Chemistry 1

Calculate q when 22.0 g of water is heated from 25.0°C to 100.0°C.

2. chem.

Diet Coke has a pH of about 3.0. Milk has a pH of about 7.0. How much greater is the H+ ion concentration of Diet Coke when compared to milk? - Would it be 1x10^4 greater concentration

3. algebra

1. write an algebraic expression for the word phrase: the quotient of r and 12 a.r * 12 b.r/12**** c.r-12 2. write a word phrase for the algebraic expression: 2t - 9 a.nine fewer than two times a number t***** b.nine fewer than two times a number t c.nine

4. Calculus

if f(x)= |(x^2-9)(x^2+1)| how many numbers in the interval [-1,1] satisfy the mean value theorem? None 1 2 3 Will someone please explain in detail?

5. Physics

On Planet X, an astronaut has maximum walking speed of 1.9 m/s. The astronaut's legs are each 1.3 m long. What is the constant of acceleration due to gravity on Planet X?

6. HELP MATH ONLY 1 QUESTION!!!!!!!!!!!!!!!!!!!!!!!!!

you draw five card from a standard deck of 52 cards p(heart)=4/5. what type of probability is illustrated and why?? 1) Theroretical ; the result is based on then number of possible outcomes 2) Theroretical; the result is found by repeating an experiment

7. algebra

Which of the following expressions is true? a. 4^3 * 4^5 < 4^12 b. 5^2 * 5^3 > 5^5 c. 3^2 * 3^4 = 3^2***** d. 5^2 * 5^4= 5^8 Which of the following expressions is true? a. 2^4 * 2^4 >2^7***** b. 3^2 * 3^6= 3^7 c. 4^3 * 4^5< 4^8 d 5^2 * 5^3 = 5^6 Please

8. Social Studies

On which idea did Patriots and Loyalists most agree?

9. math

Vivian is going to do some yard work, but she needs to leave her house at 2:00 to go to a football game. She is going to mow the lawn for 1 hour and 15 minutes, trim some bushes for 40 minutes, and put down some mulch for 25 minutes. She will also need 30

10. Calculus

a 160-inch strip of metal 20 inches wide is to be made into a small open trough by bending up two sides on the long side , at right angles to the base. the sides will be the same height , x. if the tgrough is to have a maximum volume, how many inches

11. ap chemistry

Discuss briefly the relationship between the dipole moment of a molecule and the polar character of the bonds within it. WIth this as a basis, account for the difference between the dipole moments of CH2F2 and CF4. does anyone have any idea? the greater

12. Chemistry

The heat of combustion of liquid hexane (C6H14) to carbon dioxide and liquid water at 298 K is -4215 kJmol−1 . Find ΔrU of the reaction.

13. SCIENCE HELP! ONLY ONE QUESTION!

Which of the following correctly describes how nerve impulses move throughout the body? A. Electrical transmission through neurons and elecrical transmission between neurons. B. Chemical transmission through neutrons and chemical transmission between

14. Algebra 1

The area of a rectangular pool is given by the trinomial 2y^2+5y-42 . What are the possible dimensions of the pool? Use factoring. a. 2y+7 and y-6*** b. 2y-2 and y+6 c. -2y-7 and -y-6 d. 2y-7 and y+6 tbh im guessing. i have no clue. can someone help

15. math

One wet weekend, 0.86 inches of rain fell on Saturday. The next day, 1.52 inches of rain fell. How many inches of rain fell over the weekend? i need help I've been stuck on this for 30 minutes

16. Calculus

The end behavior of f(x)=(2+x^2)/(x^2-36) most closely matches which of the following: y=1 y=-1 y=2 y=0 There is no leading coefficient so I am not sure what the answer is.

17. Trig

Prove that : (Sin Ө + Cosec Ө)/(Tan Ө+Cot Ө) = Sin Ө + Cos Ө

18. English 12

can someone check my answers please? 1. Which of Yeats's poem opens with the symbol of a gyre, a spiral spinning out of control? (1 point) "Sailing to Byzantium" "The Second Coming"(My Answer) "When You Are Old" "A Prayer For My Daughter" 2. Which of the

19. Physical Ed

11. Disagreements are a normal part of life. (1 point) True False 12. Talking to a trustworthy adult is the best way to stop sexual abuse and get help. (1 point) True False 13. Some conflicts are made worse by peer negotiation. (1 point) True False 14.

20. physics

A hunter aims directly at a target (on the same level) 120 m away.? (a) If the bullet leaves the gun at a speed of 250 m/s, by how much will it miss the target? (b) At what angle should the gun be aimed so as to hit the target?

21. Physics

a diver running 1.6m/s dives out horizontally from the edge of a vertical cliff and reaches the water below 3.0s later. how high was the cliff and how far from its base did the driver hit the water?

22. Math

a yogurt shop offers 5 different flavors of frozen yogurt and 11 different toppings. How many choices are possible for a single serving of frozen yogurt with one topping.

23. chemistry

What are the 4 main components of air in their molecular form?

24. Physics

how far must you swim upstream to get directly in front of a pizza stand .2 km away on the other side of a river if you can swim 4km/hr and the river moves downstream at 1.5km/hr

25. Spanish

In which country is baseball more popular than soccer? A. la Repúplica Dominicana B. Argentina C. Espana D. Perú I think the answer is B, am I correct? If not B then C.

26. math

Valerie tells Robbie, "I'm thinking of a number between 1 and 50. If I divide the number by 4, then add 5, then subtract 6, I get 6. i tried 12,24,36,48,42 its non of those

27. math

Algebra 1) 11x + 2y - 4x - y 2) 9x + 2y -5x what i did in no. 2 is subtract 9 and 5 then add 2... please correct mw if i am wrong

28. physical

the ability to exert muscle force quickly is known as 1) agility 2) power 3) recation time 4) speed I need help! Plz anyone!

29. Physics

a shot-putter throws the shot with an intial speed of 14 m/s at a 40 degree angle to the horizontal. Calculate the horizontal distance traveled by the shot if it leaves the athlete's hand at a height of 2.2m above the ground. t=2.06? x=22.08? am i right?

30. Math

the probability of winning a game is 25% . How many times should you expect to win if you play 40 times

31. algebra

Make a table to find the balance in an account starting with \$135 at 5% compounded annually for 2 years. In your last calculation, round to the nearest cent. 1 \$136.10 2 \$148.84 3 \$141.75 4 \$148.50 i think its 3 please help

32. MATH area trapezoid

whats A=1/2 h(b1+b2) if h is 6, b1 is 8 and b2 is 12? area of trapezoid?

33. Roman history

Which fact most clearly shows the difficulty in defending the Roman empire against invasion? A. At its height, the empire likely had a population as high as 100 million. B. At its height, the empire comprised nearly 1.7 million square miles of land and

34. civics

There is a public debate between the three candidates for the U.S. Senate. During the debate, the topics of oil and energy are addressed. Each candidate expressed their view on the issue: Edgar Eisenhower: "We need to cut our dependence on foreign oil.

35. Chemistry

A metal, M, of atomic weight 96 u reacts with fluorine to form a salt that can be represented as MFx. In order to determine x and therefore the formula of the salt, a boiling point elevation experiment is performed. A 10.9 g sample of the salt is dissolved

36. Calculus

Find the x-coordinates where f '(x) = 0 for f(x) = 2x + sin(2x) in the interval [0, 2π]. MY ANSWERS: x = π/2 x = 3π/2

37. Calculus

A particle moves along the x-axis with position function s(t) = e^cos(x). How many times in the interval [0, 2π] is the velocity equal to 0? 1< My answer 2 3 More than 3 I don't really get this question will someone please explain it to me?

38. Chem 2

Using values from Appendix C in your textbook, calculate the value of ΔH° for the reaction 4 NH3(g) + 5 O2(g) → 4 NO(g) + 6 H2O(g)

39. physics

The two small spheres each with mass m= 25g are hung by silk threads length L=.65m from a common point. When the spheres are given positive charge such that q1=2q2, each thread hangs stationary at theta=15 degrees from the vertical. Using Newton's first

40. Social Studies

Compare and contrast the economies of Chile and Venezuela. I really need some help on this can someone name the similarities and differences pleace?

41. Math

Find the surface area of the prism 5m 9m 12m 1.426m 2.306m

43. Math

What are the intercepts for 1.9x-1.9y=3.8

44. SCIENCE HELP PLZZZZZ! ONLY ONE QUESTION!

Which of the following correctly describes how nerve impulses move throughout the body? A. Electrical transmission through neurons and elecrical transmission between neurons. B. Chemical transmission through neutrons and chemical transmission between

45. physical education

why are all the pe teachers the ones that need to be the one in physical education so they could lose weight because they are the ones that are always fat and out of shape

46. AP CHEMISTRY

The molar mass of an unknown organic liquid (M~100) is determined by placing 5 mL of the liquid in a weighed 125-mL conical flask fitted with a piece of Al foil with a pin hole in it. The flask is heated in a boiling water bath until the liquid evaporates

47. Science help.

1. The ___ is the outer, thinnest layer of your skin, which houses sweat pores. (1 point) epidermis dermis fatty layer hair 2. One of the purposes of sweat glands is to release waste products, such as water and _____. (1 point) blood dirt sugar salt 3.

48. math

Find the volume of a cone with a radius of 10 mm and a height of 6 mm.? 628 mm3 600 mm3 1,884 mm3 1,254 mm3 is it c

49. history social

i need help to make a love poem

50. Literature

"They said that Jose was born with a ring of dirt around his neck, with grime under his fingernails, and skin calloused form the grainy twist of a shovel" What kind of literary device is this?

51. social studies

is francisco de Goya a renaissance artist??

52. Math

A coin is tossed and a number cube is rolled. What is the probability that the coin show heads and the number cube shows 5

53. Math

Sammy likes to mix match her 4 necklaces, 2 bracelets, and 3 hats. The colors are listed in the table. On Monday, she randomly picks a bracelet, a necklace, and a hat. What is the probability of Sammy choosing a red necklace and a yellow bracelet.

54. Math

The spinner is divided into equal parts. Use a tree diagram to find the probability that the spinner will land on a constant both times if the spinner is spun twice.

55. Math

Tony works in a factory that produces 1,000 computers each day. When 50 were sampled, it was found that 7 were defective. Estimate how many defective computers are made each day

56. Math

a survey showed that 36% of car owners prefer two-door cars, 52% prefer four-door cars, and 12% have no preference. You ask 300 people. How many do you think would prefer two-door cars?

57. Math

From a barrel of colored marbles, you randomly 5 blue, 2 yellow, 3 red, 4 green, and 2 purple marbles. Find the experimental probability of randomly selecting a marble that is not yellow

58. Math

A standard number cube with the numbers 1 through 6 is rolled. Find the probability of rolling a number greater than 5

59. Math

Which events are not indepentant

60. Math

The table shows the drink preferences of 50 shoppers at the mall. What is the probability that one shopper, selected at random for 50 surveyed, preferred either Drink B or Drink A

61. Math

A game involves spinning this spinner. What is the probability of the pointer landing on R

62. Math

A single, standard cube is tossed. What is the probability of getting a number greater than 3

63. math

12. Estimate the area of a circle with a radius of 16 meters. use 22/7 for π A. 62 Square meters B. 531 Square meters C. 805 Square meters D. 1,608 Square meters if someone could help me please that would be nice idk how to do the math- ;-;

64. math

Genna has 5/6 litre of soup. She pours the soup equally into 10 mugs. How much soup is in each mug?

65. Math

Use the graph below to answer the question that follows> Which statement describes the speed of the remote-control car over time? A-the speed of the car decreases from 4mi/h to 2mi/h in the first 3 seconds, increase to five mi/h in the next 2 seconds, and

66. math

A pyramid has a height of 5 in. and a surface area of 90 in Find the surface area of a similar pyramid with a height of 10 in. Round to the nearest tenth, if necessary.

67. Social Studies

1.Suppose that people in your community voted to eliminate all local taxes. Which of these goods and services would most likely disappear? A-Interstate highway B-Neighborhood trash pick-up C-Regional military base D-Grocery store parking lots

68. algebra

Suppose that on January 1, 1899, one of your ancestors invested \$41 compounded annually at 4.5%. If this money were left to you, how much would you have had on January 1, 2002? 1) \$192 2) \$3,817 3) \$190 4) \$3,989*** Please help me i believe it is 4 but i

69. algebra

A coin is tossed. If a head appears, a spinner that can land on any of the numbers from 1 to 4 is spun. If a tail appears, the coin is tossed a second time instead of spinning the spinner. What are the possible outcomes? 1) (T, H), (H, H), (H, 1), (H, 2),

70. Social studies

contrast the upcountry and the lowcountry identify three differences between the two regions plz help

71. Math

Hey! I need help with this question. Apply the properties of integer exponents to identify all of the expressions equivalent to 18. a) 2-3 b) 23 c) 123 d) 22x 2-5 e) 2-2x 25

72. earth and space science

using an atlas, find the latitude and longitude of San Francisco, California; Wichita, Kansas; and Richmond, Virginia.what do these three cities have in common

73. History

What is the role of the government in the mixed economy

74. math

Solve 3(x+8)=−3(7−1/4x) What is x equal to?

75. Geography

What year did Mongolia stop receiving economic aid from the Communist Government of the Soviet Union? * a. 1911 b. 1924 c. 2014 d. 1991 I think its b but I'm not sure.

76. chemistry

What is the atomic number of potassium? 2 19 20 39 I know it's not 2 but other than that I'm not sure.

77. chemistry

When using science to investigate physical phenomena, which of the following is NOT a characteristic of the event must exist? measurable falsifiable observable readable

78. geography

Where in Europe are the Romance languages mainly spoken? Central Europe Northwestern Europe Southern Europe Western Europe

79. geography

Which islands are part of the Greater Antilles? Aruba Cuba Hispaniola Jamaica Martinique Montserrat Puerto Rico

80. science

Which of the following statements about the Moon is true?

81. math

Jill ran 6 1/4 miles at practice today. Amanda ran 3 7/8 miles at practice today. How many more miles did Jill run

82. English

(1) Sale looked at the map one more time. (2) She knew that the whole troop was depending on her. (3) Sal couldn't decide if the trial was to the east or to the west. (4) The map was confusing. (5) Sal was tired. (6) She needed to make a decision. 1. Which

83. Math

If a gardener has 337481trees and you devied it by 378what I our answer

84. Math

Least three different numbers that up to get one

85. Math

solution to (4 x 10^3) x (6 x 10^6) written in scientific notation 24 x 10^9 2.4 x 10^9 THIS ONE 24 x 10^18 2.4 x 10 ^10

86. Home economics

List and explain five branches of home economics which are inter related

87. science

Using what you know about rock and fossil samples, why do you think that is it possible to have the same type of sample but get different results? How does this apply to rocks? can someone tell me in a simpler way what this is please

88. math, algebra

1. what is the LCD for 3/5 and 1/6 2. what is the difference between 3/7 and 1/14 and so on plz help me

What was the approximate timespan of Acts? (Bible)

90. Algebra

BIll uses x for the cost of a computer game. He buys seven games. Write this as an algebraic expression

91. Social studies

When did the Romans take over Italy? A: By 500 BC B: By 267 BC C: 125 BC D: By 100 AD

92. Math

James and Becky have a total of 4 2 over 8 feet of yarn. Becky has 1 5 over 8 feet of yarn. How many feet of yarn does James have?

93. Social Studies

what important feature do Confucianism and filial piety share

94. math

identify the decimal and simplify fraction from of %80

95. math

HOW TO FIND A RATIO

96. ss

even today many Indian women have

98. Spanish

I need help! The question is Which word best completes the following sentence? The standard variety of Spanish is considered A. Natural B. Colorful C. Easy D.neutral I think that it’s a, is that right?

99. Math

Given a scale factor of 2, find the coordinates for the dilation of the line segment with endpoints (-1,2) and (3,-3)