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1. Science

Im sorry i am totally stumped What is the main difference between mechanical and electromagnetic waves A. Mechanical waves involve the transfer of energy; electromagnetic waves do not B. Mechanical waves require a medium to travel in; electromagnetic waves

2. LA walk two moons

1. Which of the following passages from the text best illustrates sal's feelings about her new home in Ohio? I did not think we would ever leave, and yet i did not want to leave. Tiny, squirt trees. Little birdhouses in a row-and one of these birdhouses

3. history

How were the economies of the Nothern and Southern states different? How were they the same?

4. History

How are the economies of northern and Southern states different?how are they the same? What factors led them to develop differently

5. Math

A population of flies grows according to the function p(x)=2(4)^x, where x is measured in weeks. A local spider has set up shop and consumes flies according to the function s(x)=2x + 5. What is the population of flies after two weeks with the introduced

6. English

The speaker in "The Road Not Taken" is a person who? A. Is lost in the woods B.Remembers making a decision C.Is currently standing at a forn in the road D.Likes to walk on a well beaten path.

7. Math

Find two consecutive whole numbers that square root of 54 lies between what two numbers

8. science

what happens to air temperature as altitude increases?

9. math

Write the number that makes the statement true. 1. 205.5 m = _____ mm (1 point) 205,500 0.2055 20.55 20,550 2. 199.2 km = _____ m (1 point) 199,200 19.92 19,920 0.1992 Use benchmarks to estimate the sum. 3. + (1 point) 2 1 0 Estimate the difference. 4. 6

10. History

What was one way the Inca unified their empire? A) They built a powerful army to defend the empire. B) They allowed conquered people to elect rulers. C) They forced conquered people to use their language. D) they forced their religion on conquered people.

11. Social Studies

Why did the Founding Fathers choose to adopt a Constitution? To give states rights within a nation To give individual right within their states To outline the powers of a new federal government ----- To limit the powers of the existing federal government

12. History

which of the following best describes daily life in the south during the civil war? a.about the same as before the war because factories provided necessities b.difficult but tolerable because most people did not experience major changes c.better because

13. history

Which statement describes a characteristic of East Africa? A. Its mountainous region made East Africa difficult to protect itself from invaders. B. After Christianity came to the region, Islam was no longer practiced after the 1000s. C. Through trade, East

14. science

if there is a low pressure area developing over warm water, what type of storm is most likely to form?

15. Polynomials

suppose you earned 6t+2 dollars on monday and 9t -6 dollars on tuesday what were your total earning simplify your answer A 15t-4 B 15t+8 C -3t-4 D -3t+8 My answer is a

16. Language Arts 7a Unit 2 different perspectives

1. Consider the main character from "Stolen Day" and "The Night the Bell Fell" Discuss which character learns the most and which learn the least. use detail from the selection to support your ideas. Use the reading selection to help you answer the question

17. math

a cube with side length 4 cm. is 25% full of sand. What is the volume of the sand?

18. Skip a unit

in school there is a unit about sex and the reproductive system. my parents want me to skip the unit because they want to inform me abt these things themselves, but my teacher says i can't skip the unit. what do i do? i don't want to disobey my parents,

19. Science

Why are coral reefs found only in the euphatic zone? A. it is the shallowest zone and contains sufficient light and oxygen to support the most life. B. it is a middle zone so there is the right balance of light and dark allowing coral to thrive. C. it is

20. science

weather maps use isobar lines to show weather conditions. what is indicated by this?

21. Social Studies

Which of the following do historians not consider a legacy of the Byzantine Empire? a.Justinian’s Code: an organization of Roman laws b.Eastern Orthodox church: a combination of Eastern culture and Christianity c.Cyrillic alphabet: a combination of Greek

22. physics

Object 1 has a velocity of 3m/s and a mass of 5kg. Object 2 also has a mass of 5kg but isn't moving. Object 1 collides with Object 2 and they move off together. Work out their speed using the principle of conservation of momentum.

23. chemistry.

A sulfur oxide is 50.0% by mass sulfur. This molecular formula could be?....IS IT NOT SO2???

24. social studies

1. which of these was a result of the invention of the cotton gin. A. It greatly reduced the need to plant cotton seeds by hand. B.It provided a faster method for separating seeds from cotton fibers C.It enabled slaves to work in factories operating

25. Math

Write the ratio in the simplest form 45:15 A. 9:3 B. 3:1 C. 1:3 D.4:1 CAN SOMEONE HELP ME ON THIS UNIT TEST FOR LESSON 8: APPLICATIONS OF PROPORTIONS JUST POST THE ANSWERS I DONT HAVE TIME ANYMORE TO GO THROUGH THE WHOLE THING WITH MY OWN

26. History

What is the best title for this map? A map of South America, Africa, and parts of North America and Asia between the years seventeen hundred and eighteen hundred and seventy. The states, cities, and regions that are labeled are Danish Caribbean, North

27. Biology

Chordate (not a primate) •Explain how body plan and anomoty enables chordate to perform the essential functions it needs to survive. •Explain how your chosen chorodate fonts into the cladogram of chordate.

28. math

melanie has a set of cubes. each cube has a measure of 2 inches on each edge. if 27 of the cubes completely fill a box, what is the volume of the box? A 108 cu in. B 216 cu in.*** C 54 cu in. D 27 cu in.

29. math

Create two different situations: one in which you use combinations and one in which you use permutations please help me with this question or give me some sites too look at, I don't understand.

30. Polynomials and properties of exponenets

In the expression -7x-3x^2+5 what is the coefficient of x A.7 B.3 C.-3 D.-7 Suppose you earned 6t+2 dollars on monday and 9t - 6 dollars on tuesday what were your total earnings simplify your answer. A.15t-4 B.15t+8 C.-3t-4 D.-3t+8 100^12/100^8 A.100 ^12/8

31. physics

A 3.6 kg wood block is launched up a wooden ramp that is inclined at a 30¡ angle. The block's initial speed is 13 m/s. (Use µk = 0.20 for the coefficient of kinetic friction for wood on wood.) What vertical height does the block reach above its starting

32. type of reaction

what type of reaction is ammonium nitrate? HNO3(aq) + NH3(l) --> NH4NO3(aq)

33. Biology

1)Which of the following is NOT a true property of water? A-Water is a good solvent dissolving a wide variety of substances. B-Water has a high ice density allowing ice to sink when present with liquid water. C-Water has strong cohesion allowing it to bead

34. english

1. which is the best example of the use of rhyme ? A. the beat of a drum B. fresh green grass** C. a little wild child D. the kindness of strangers Check my answer please

35. math

-2v-7=23 (A)15 *** (B)8 (C)-8 (D)-15 Am I right?

36. social studies

The concept of multiculturalism encourages Canadians to __________. 1.embrace English traditions above French ones 2.maintain their family traditions while also sharing a Canadian identity 3.speak only French in the most populated cities 4.focus on their

37. Math

Tony's family wants to arrive at the family reunion at 5:00 pm for the supper that is being planned. Driving time will be about 6 hrs 30 mins. They plan to stop for gas one time for 10 mins. They also will stop for lunch for 45 mins. At what time should

38. MATH

i need help wiht this question 6/2(1+2)=

39. Economics

Suppose a university decides to alter its tuition schedule by separating its students based on how many years of college they have completed. Most university programs require four years to complete. First-year students would get a 13% tuition reduction.

40. Physics

It is well known that bullets fired at Superman simply bounce off his chest. Suppose that a gangster sprays Superman's chest with bullets of mass m = 2.6 g at a rate of R = 140 bullets/min. The speed of each bullet is v = 510 m/s. Suppose the bullets

41. Science

At which point on the roller coaster do the riders have the LEAST gravitational potential energy? F G H** K

42. Math (Unit 7) 6th grade

49, 55, 52, 46, 47, 42, 38 What is the Mean Absolute Deviation(MAD) of this data set?:My answer was 4.28571428571 What is the Mean of this data set?:My answer was 47 What is the distance of each number from the mean?:?

43. Physical Science

A distance-time graph indicates than an object moves 100 m in 4 s and then remains at rest for 6 s. What is the average speed of the object? A. 50 m/s B. 25 m/s** C. 10 m/s D. 100 m/s Which example identifies a change in motion that produces acceleration?

44. Science

Makayla applied a force of 90N to move a crate a distance of 4meters. How much work has been done? A: 22.5J B: 86 J C: 94 J D: 360 J

45. social studies

What form of government does Canada have?

46. Science

1. The Hertzsprung-Russell diagram below shows how the brightness, surface temperature, and color of stars are related.stars would be * 3 points Captionless Image A Barnard’s Star is less bright than the sun, has a surface temperature below 3,800 K, and

47. History

Which of the following best describes the role of women during the civil war? A.They waited at home b.they built railroads to transport food to troops C.they fought alongside men D.they mangaged families,businesses,and hospitals During the war, many

Manny loves to eat Cajun pizza. Each square inch of pizza is 8 calories. He orders a slice of pizza from a pizza with a diameter of 16 inches that is cut with a central angle of 20 degrees. How many calories does he eat? Answer A. about 89 calories B.

49. physics

A copper (Cu) weight is placed on top of a 0.24 kg block of wood (density = 0.60*10^3 kg/m3) floating in water. What is the mass of the copper if the top of the wood block is exactly at the water's surface?

50. Polynomials and properties of exponenets

6t^3 x 6t^3 A.12t^3 B.12t^6 C.36t^6 D.36t^9 -3(4x+5) A.7x+15 B.7x-15 C.-12x-15 D.-12x+15 5k^2(-6k-2k+6) A.-30k^3+3k^2+30k B.30k^4-10k^3+11k^2 C.-k^4+3k^3+11k^2 D.30k^4-10k^3+30k^2 (-4x).9x^2 A.-36^3 B.-36x^2 C.5x^3 D.5x^2 16. (2.2 . 10^-3) (4 . 10^-2 A.

51. Physic

John carries a 200 N suitcase up three flights of stairs (a height of 10 m) and then pushes it with a horizontal force of 50 N at a constant speed of 0.5 m/s for a horizontal distance of 35 meters. How much work does Ben do on his suitcase during this

52. Chemistry

A sample of gas in a cylinder of volume 3.78 L at 318 K and 3.3 atm expands to 6.76 L by two diﬀerent pathways. Path A is an isothermal, reversible expansion. Calculate the work for Path A. Answer in units of J

53. physics

A car traveling at 22.1 m/s honks its horn as it directly approaches the side of a large building. The horn produces a long sustained note of frequency f0 = 235 Hz. The sound is reflected

54. science

10. Which of the following is an effect of global warming? A) increased drought B) falling sea levels C) decreased coastal flooding D) glacier spreading

55. science

1. When Mendeleyev arranged the elements into the periodic table, he found that elements with fell into groups on the table A. the same mass B. similar size C. Similar properties D. The same color 2. Every element has its own atomic number. The atomic

56. Calculus

Money is deposited in an account for which the interest is compounded continuously. The initial investment in the account is \$2000 and the annual interest rate is 14%. What is the time required for the balance to double? Round your answer to three decimal

57. physics

A ship, carrying freshwater to a desert island in the Caribbean, has a horizontal cross-sectional area of 2800 m2 at the waterline. When unloaded, the ship rises 6.00 m higher in the sea. How much water was delivered?

59. Geometry

Linda has two fish tanks in the shape of rectangular prisms. Each of the sides of the second fish tank is 3 times greater than the sides of the first fish tank. If Linda fills both the fish tanks completely with water, the volume of water in the second

60. History

1 who was the abolitionist captured at harpers ferry virginia 1 john brown 2 harriet tubman 3fredrick douglass*** 4 simon legree 3 the first president of the confederate states if america was Abraham lincoln Robert e lee Jefferson davis John x Calhoun

61. chemistry

Calculate the uncertainty in speed of an electron if its position in space is known within the range of ±2pm. Assume me = 9×(10^-31) kg

62. physical education

what is physical education

63. English

The narrators of "Oranges" and "The Bass, the River, and Sheila Mant" both experience the rite of passage of a: regret b: graduation c: young love/dating d: stranger's kindness

64. math

change -312 degrees to radian measure in terms of pi

65. science

1. Which is not a characteristic of the group 1 alkali metals? A. High densities B. Low melting points C. Found in batteries D. Silvery solid 2. which of the following is true of the group 2 alkali earth metals A. they are less dense that the group 1

66. Social studies

1.How long of a term does a justice Of the supreme Court serve? A. 4 years B. 6 years C. 10 years D. for life My answer D. for life

67. math

Classify each number below as an integer or not. 10 -5 -16.42 -5/6 27/7

68. math

Which statement describes the similarity between sketches and drawings? A Both sketches and drawings are made freehand. B Both sketches and drawings do not require a compass C: Both sketches and drawings do not need drawing tools like a pencil. D. Both

69. physics

A car traveling at 22.1 m/s honks its horn as it directly approaches the side of a large building. The horn produces a long sustained note of frequency f0 = 235 Hz. The sound is reflected off the building back to the car's driver. The sound wave from the

70. History

Aaron Burr hated Alexander Hamilton because Hamilton a. doubted Burr's character, and sabotaged his political aspirations. b. did not serve in the military during the American Revolution. c. was his biological father. d. never supported the policies of

71. algebra 2

how do you solve quadratic equations by finding square roots i have no clue how to do this. I have fallen behind in my math class because my teacher is horrible. I need to learn this to understand everything in the section in the section. I beg someboody

72. US History

Why did Thomas Paine’s Common Sense inspire colonists? A. Paine listed ways to defeat British troops. B. Paine suggested creating a colonial House of Lords in Congress. C. Paine supported a gradual move toward independence from Britain. D. Paine talked

73. Science

escribe why there are different layers in the atmosphere what are the charecterestics of them which one has the ozone layer which layer is the coldest which is the hottest which one holds the aurora borealis

74. Algebra

Sabrina is building a rectangular raised flower bed. The boards on the two shorter sides are 6 inches thick, and the boards on the two longer sides are 4 inches thick. Sabrina wants the outer length of the bed four times it's height and the outer width to

How do do the worksheet, guess my rule with two rules. Guess each rule and write it down. Using shapes.

76. math

marcy has a total of 100 dimes and quarters. if the total value of the coins is \$14.05, how many quarters does she have? You need two equations to substitute into each other. You need one for the total number of coins, and one for the amount. d=# of dimes

77. science

If all of the prairie dogs were removed, how do you think the prairie ecosystem would be affected?

78. algebra

The formula for the area of a trapezoid is A = h(B + b) 2 . The area of the truss is 20 square feet. Find the height of the truss if the shorter base is the same as the height h.

79. Social Studies

1. Explain the role that religion had in different parts of the Colonies during early settlement. 2. Compare and contrast the economies of the New England, Middle, and Southern Colonies.

80. Physics

A stone is dropped from rest from the roof of a 100-m high building; 2.00 s after that, a second stone is thrown straight down with initial speed v0, and the second stone passes the first stone 21.6 m above ground. (a) When are the stones at the same

81. Math

completely factor the difference of two squares x^2 - 64

82. Math

Martin and Patrick have a model of an airplane which they want to duplicate. Martin uses a string and ruler to make approximate measurements of lengths to duplicate the picture. Patrick uses a pencil and paper and duplicates the picture without the help of

83. math

7r-3s=-17 3r+7s=59 thanks

84. Chem

What mass of nickel is dissolved in 100. mL of saturated nickel (II) hydroxide? (Ksp = 1.6 X 10^-16) How do I do this? Please don't use different names. It helps us to know what we have already told you in other problems if we have some consistency with

85. History

Why was the anti British less than the other 12 colonies

86. math

you spin a 6 section red spinner and a 6 section blue spinner. Find P(red less than 4 and a red 2).

87. Physics

A 15.0 m long truck traveling at 40.0 mph has a braking capability of 5.00 m/s2 from this speed. It is approaching a 10.0-m wide intersection with a traffic light that is turning yellow. (a) What is the minimum distance the truck can be from the

88. reading help me pls :(

1. What does the Wool Pooh represent to Kenny? (1 point)a nightmare death bullies fear 3. Which two characters engage in a power struggle in the story? (1 point)Rufus and Larry Dunn Rufus and Cody Byron and Momma Joey and Dad 4. Why is Kenny convinced, at

89. statistics

A manufacturer makes two models of an item: model A which accounts for 70% of unit sales, and model B which accounts for 30% of unit sales. Because of defects, the manufacturer has to replace (or exchange) 4% of its model A and 17% of its model B. Question

90. alg

which of the following is a solution to the equation y = 3x - 1 A.(4,1) B.(2,5) C.(4,3) D.(0,-3) Answer: A

91. math

A room contains 80 sophomores of which 39 are males and 41 are females. There are also 69 juniors of which 36 are males and 33 are females. You pick 3 students at random. What is the probability that all 3 are males?

92. Math

The two positive integer solutions of the equation x^2 - mx + n = 0 are k and t, where m and n are both prime numbers and k > t. What is the value of m^n + n^m + k^t + t^k

93. Algebra

Find one pair of real numbers, (x,y), such that x + y = 6 and x^3 + y^3 = 144.

94. statistics

Buy three small packages of M&Ms and 5 small packages of another brand of candy (same net weight as the M&Ms). Test whether or not the mean number of candy pieces per package is the same for the two brands.

95. statistics

In a recent survey, it was stated that Malaysians watch videos on YouTube on average two hours per day. Assume that σ = 2. Using students in UTeM as the sample, conduct a hypothesis test to determine if the average for students at UTeM is lower

96. Math

Cole and Efram are neighbors. Cole is 25 years old and, while they are not the same age, Efram's age contains the same 2 digits. The next time that will happen is in ____ years.

97. Math

Ken started the day with some money in is pocket. After he took some money out of his bank account, he had \$4 more than twice the amount he started with. He then received a birthday present which doubled the amount of money he had with him. Ken now had

98. MATH

0.3X/4 = 0.5/3

99. writing sentences and paragraphs

Paragraph 1 Background You’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and tells you to bring with you a polished piece of writing for them to evaluate your writing skills. The paragraph must