# jake

Newest questions and responses by jake
1. ## history

1: How did the German part of Charlemagne's kingdom change under the rule of Otto the Great? A. It was divided by several German dukes. B. It fell under the rule of the Byzantine empire. C. It was invaded by Anglo-Saxons. D. It was united as one empire. 2:

2. ## history

How did the German part of Charlemagne's kingdom change under the rule of Otto the Great? A. It was divided by several German dukes. B. It fell under the rule of the Byzantine empire. C. It was invaded by Anglo-Saxons. D. It was united as one empire.

3. ## Physics

What are the forces you exert on a briefcase as you hold it while standing at a bus stop?

4. ## Physics

Heat is added to a silver bar of mass 0.034 kg and length 0.28 m. The bar expands by an amount of 3.8×10-4 m. How much heat was added? I need the answer and the equation please thanks!

5. ## Physics

Liquid oxygen boils at a chilly -183.0o C when the pressure is one atmosphere. A small silver disk of mass 34.0 grams and temperature 27.3o C is dropped into the liquid. What mass of oxygen boils off as the coin cools to -183.0o C? I need ther answer and

6. ## Physics

A 8.52 kg block of ice has a temperature of -17.9o C. The pressure is one atmosphere. The block absorbs 3.780×106 J of heat. What is the final temperature of the liquid water? (Give your answer in oC, but enter only the numerical portion--oC is implied) I

7. ## Physics

A 0.60 kg chunk of ice has a temperature of -28.2o C. The pressure is one atmosphere. Heat is added to the chunk until it is completely vaporized and the steam is at a temperature of 114.4o C. How much heat was needed for this transformation? Please i need

8. ## Physics

Heat is added to a silver bar of mass 0.034 kg and length 0.28 m. The bar expands by an amount of 3.8×10-4 m. How much heat was added? Please i need the answer and the equation to get to the answer Thanks!

9. ## Physics

0.115 kg of water at 89.0o C is poured into an insulated cup containing 0.226 kg of ice initally at 0o. Calculate the mass of liquid when the system reaches thermal equilibrium.

10. ## Physics

4 kg of lead shot at 91.1o C are poured into 4 kg of water at 29.5o C. Find the final temperature (in oC) of the mixture. Use cwater = 4187 J/kg oC and clead = 128 J/kg oC. Please i need the answer and equation used to solve for the answer Thanks!

11. ## Physics

A 223.0 g piece of lead is heated to 85.0oC and then dropped into a calorimeter containing 577.0 g of water that initally is at 18.0oC. Neglecting the heat capacity of the container, find the final equilibrium temperature (in oC) of the lead and water.

12. ## Physics

A lead ball, with an initial temperature of 25.0oC, is released from a height of 125.0 m. It does not bounce when it hits a hard surface. Assume all the energy of the fall goes into heating the lead. Find the temperature (in degrees C) of the ball after it

13. ## history

to control the effects of the dust bowl, the state of texas paid farmers to do which of the following? Select all that apply. (3 points) build ponds to reservoirs plant different crops use more powerful tractors plant rows of trees to serve as windbreaks

14. ## Math

I have a math question that I am somewhat confused on that I need a bit of help with please. What is the shortest possible perimeter for an arrangement with an area of 15 square feet? How do I go about figuring this out?

15. ## Chemistry

Carbonic acid forms when carbon dioxide dissolves in water according to this equation: CO2+H2O =H2CO3 How many moles of CO2 must dissolve in an excess of water to produce 3 moles of H2CO3?

16. ## Math

first of today. wats 7-3 x 2x / 5 x 4 + 680 x 5(8x + 28) = 157

17. ## Math

if angle a equals 91 degrees and angle b equals 40 degrees what is the measurement of angle 1 on a triangle?

18. ## New Mexico history

How were the maya and the Aztec civilizations similar

19. ## English

is this sentence correct? Barlow uses a logical argument because cyber security is a relatively new issue, meaning many people will not be properly informed on the topic. if i put a colon after argument would the make it correct?

20. ## English

is this sentence correct? Barlow uses a logical argument because cyber security is a relatively new issue, meaning many people will not be properly informed on the topic.

21. ## Algebra

Write in exponetial form: root x 1/x

22. ## history

In which geographic region Texas is the NASA Johnson space center located A. Coastal Plains B. Great Plains C.Mountain and Basins D. North Central Plains I think the answer is B

23. ## Calculus

Let f(x)=ax^2+(3a−2)x−6. What point does the right-hand x- intercept approach as a increases without bound?

24. ## math

A bag contains 4 white, 3 blue, and 5 red marbles. 1. Find the probability of choosing a red marble, then a white marble if the marbles are replaced 1/12 5/36 5/6 5/12 2. Find the probability of choosing 3 blue marbles in a row if the marbles are replaced.

25. ## Chemistry

49.0 mL of HClO3 is completely titrated by 68.4 mL of a Sr(OH)2 solution whose concentration is 0.3893 M. What is the molarity of the HClO3 solution? Sr(OH)2 + 2HClO3 = 2H2O + Sr(ClO3)2

26. ## Math

What is the probability of getting an even number when rolling a six-sided number cube?

27. ## math

Describe a situation that models a linear pattern and then describe a situation that models a nonlinear pattern.

28. ## Calculus

A function has f''(x) = 10 and has f'(4) = 0 and f(2)= 4. Find f(x).

29. ## math/combination probability

what is the probability of getting all questions right on a 15 question, 3 multiple choice (each) with just guessing? i did 15 C 3 and got 1/455

30. ## Social Studies Help please its a quiz

Dix also joined a growing movement to improve conditions in prisons. Men, women, and children were often crammed together in cold, damp rooms. When food supplies were low, prisoners went hungry—unless they had money to buy meals from jailers. Five out of

31. ## S.S help please thank you

Which of the following best summarizes the information shown in the graphic organizer?  (1 point

0.2x0.8

33. ## maths

The speed of light is about 2.99x10^8 m/s. If a rocket travels at one-fifth the speed of light, find its speed in km/h (in scientific notation correct to 2 significant figures)

34. ## social studies

please help, i have no clue! they all seem like a good answer to me.. The Macdonald-Cartier bridge that stretches the Ottawa River and connects Ontario to Quebec is named for two Canadian politicians, one ______ and one _______. A.English, German

35. ## Math

The ratio of the cost of a tennis racket to tennis balls is 18:1. If a can of balls cost \$5.35, what is the cost of the racket?

36. ## math

2g – 1 = 3g + 6  how do i do this equation?

37. ## Math - algebra

On Day 1 of the state fair, Austin sold 15 handmade stools. On each of the next 9 days, he sold 5 stools. The linear function f(d) can be used to represent the total number of stools Austin sold, where d is the day of the fair. Solve the problems below.

38. ## Physics

What makes a hydrometer with a spherical bulb good for measuring precise density? What makes this shape better than others?

For electromagnetic radiation with a wavelength of 576.3 nm: (a) What is the frequency of the radiation (in s-1)? (b) What is the energy (in J) of one photon of the radiation? (c) What is the energy (in kJ) of one mole of photons of the radiation So a I go

40. ## PreCalc

If 3x^3+ax^2+3x+2 leaves a remainder of 4 on division by (3x-1), find a.

41. ## science

Bison, Zebra, and kangaroos have similar ecological niches but cannot be shown in the same food web, why? (doesn't mater where they live)

42. ## gr. 9 Sience

5 foods that contain the high energy products of photosynthesis

43. ## Socioloy

Why is the 1970s considered to be a decade of change for the American media?

44. ## PreCalc

The “Hatch Shell” in Boston has the arch with semi-elliptical form with a horizontal major axis. The base of the arch is 110-foot long and the highest part of the arch is 40 feet above the scene. Find the height of the arch of the “Hatch Shell” 33

45. ## Geography

All of the following are the result of the increase in large-scale, green revolution agriculture in the region, except: A. more than 2 million small farmers have been forced to sell their land in Brazil alone since 1985. B. there has been an increase in

46. ## SS

4. Which of the following statements best summarizes Washington viewpoint on American foreign policy

47. ## math

what is a description of the ratio 52:12

48. ## Math

The area of a football field is 57600 square feet what is the area in square yards?

49. ## Language arts

Consider this line from “Two Kinds”: For unlike my mother, I did not believe I could be anything I wanted to be. I could only be me. In a paragraph, explain how those words describe the conflict between the daughter and her mother. Is there a winner in

50. ## Physics

Water flows through a pipe of radius 4 cm at a rate of 3.5 m/s. Suppose each water molecule is singly ionized (highly unrealistic). a) What is the electric current density associated with the flow of these ions? b) What is the electric current in the pipe?

51. ## Physics

An electric filament can heat 200 cm^3 of water from 5°C to 95°C in 6 minutes. If the voltage source is a 12 V battery, how much current does it draw?

52. ## US Government

The President can choose to get rid of democracy. A) True B) False (the correct answer?)

53. ## Washington state history

please help. Which industries remain as important to Washington’s economy today as in the 1800s? Select all that apply. A.biotech B.entertainment C.forestry D.mining E.software development F.tourism

54. ## washington state his

please help. Which of the following best identifies how Washington’s economy changed overall after World War II? A.It scaled back agricultural production. B.It shut down most manufacturing operations. C.Its activities became more diverse. D.Its

55. ## Math

The length of a rectangle is 5 meters more than twice the width, and the area of a rectangle is 42 square meters. Find the length and width of the rectangle.

56. ## Math

At the city museum, child admission is \$5.40 and adult admission is \$9.30. On Friday, 134 tickets were sold for a total of \$957.60. How many adult tickets were sold that day?

57. ## physic

Sample 1, Original Length 250 mm and 10 mm Diameter, Length after testing 250.23 mm the force used for the test was 15KN Sample 2, Original Length 250 mm and 14 mm Diameter, Length after testing 250.21 mm the force used for the test was 15KN 1. Calculate

58. ## chemistery

explain the progress of the reaction in terms of kinetic energy explain how various factor affect the rate of reaction

59. ## Math calculus

a cylindrical vat must hold 5m^3, the vat must be wider than it is tall, but no more than 3 m in diameter. What dimensions will use the least amount of material?

60. ## Science

If a 1 tonne car travels at 16.7 m/s (60km/h) then it would have a momentum of

61. ## Social studies

To what extent should canadians try to stop human rights abuse in other countries today?

62. ## Chemistry

what is the oxidation number of Carbon in C6H12? thank you!

63. ## science

what is the molar ratio between barium hydroxide and potassium hydrogen phthalate if they were reacted together in an acid base titration

64. ## math

Find the exact values for the lengths of the labeled segments a, b and p. Note that r=3 is the radius of the circle, and s=2 is the arc length from the point (3,0) around the circle to the indicated point.

65. ## Johnson

A perimeter of EFGH is 100cm.what is the length of side FE?

What is a summary for chapter 2 slam by Walter dean Myers

67. ## Math

There are two triangles for which A=30∘,a=5,and b=8 The larger one has c= ? and the smaller one has c= ?

68. ## Simple interest

Charlotte borrows \$9000 over 5 years to buy a second hand car. The loan must be repaid over 5 years at 12% p.a. simple interest calculate the monthly repayment if the payments are spread equally over the 5 years.

69. ## physics

An alpha particle (charge = +2.0e) is sent at high speed toward a gold nucleus (charge = +79e). What is the electric force acting on the alpha particle when the alpha particle is 3.3 ✕ 10-14 m from the gold nucleus?

70. ## Chemistry

If you wanted to create a equimolar buffer using 1.0 mol of NaHS in 1.0L of water what acid would you need to add? how many moles of that acid do you need to add?

71. ## MATHS

The quadratic function f(x) has roots at x=4 and x=-2 and has value of 2 at x=0. Does f(x) have a minimum or maximum? Find the value of the /minimum/maximum value of f(x).

72. ## physics

A long straight vertical wire of diameter 2.0mm carries a steady current upwards. At 30mm from the centre of the wire, the magnetic field strength is 0.10mT. Sketch a graph to show the variation of magnetic field strength from the wire surface to a

73. ## physics

An unstable nucleus with a mass of 18.0 ✕ 10-27 kg initially at rest disintegrates into three particles. One of the particles, of mass 5.0 ✕ 10-27 kg, moves along the positive y-axis with a speed of 9.0 ✕ 106 m/s. Another particle, of mass 7.4 ✕

74. ## physics

Two cars (A and B) of mass 1.1 kg collide. Car A is initially moving at 18 m/s, and car B is initially moving in the opposite direction with a speed of 9 m/s. The two cars are moving along a straight line before and after the collision. (Enter the

75. ## physics

How much heat is absorbed by a 30g iron skillet when its temperature rises from 24oC to 93oC? Joules do i addition everything?

76. ## physical science

How much heat is absorbed by a 30g iron skillet when its temperature rises from 24oC to 93oC? Joules do i addition everything?

77. ## Math

How many 4/5-foot planks can be cut from a board which is 12 feet long?

78. ## math

If a jet flies at a speed of 600 km/h, how many meters does it fly in 10 seconds? There are 1000 meters in 1 km

79. ## Calculas

lim (x⁻¹-1)⁄x-1 as x approaches 1. I know the answer is -1 but I am not sure how to solve the numerator x⁻¹-1.

80. ## Science

lesson 9: energy and the environment unit test science 8 A Unit 4: Energy and the environment Please HELPPPPPP!!!!!!!

81. ## calculus

find the maximum and minimum value of the function f(x)= x-x^3 on the interval [-2,2] I also need help with this question What is the largest possible product of two negative number whose sum is 1?

82. ## Physics

5. If a wave has a wavelength of 20m and a speed of 100 m/s, what is the period of the oscillation? v = wavelength / period 100 = 20 / period 100*20 = periodperiod = 20 / 100 2000 s = period OR period = 20 / 100 period = 0.2 s I don't know which one is

83. ## Physics

1. A rectangular coil 0.065 m by 0.080 m is positioned so that its cross-sectional area is perpendicular to the direction of a magnetic field. The coil has 66 turns and a total resistance of 7.6 Ω and the field decreases at a rate of 2.5 T/s. What is the

84. ## Physics -HELP

1. A rectangular coil 0.065 m by 0.080 m is positioned so that its cross-sectional area is perpendicular to the direction of a magnetic field. The coil has 66 turns and a total resistance of 7.6 Ω and the field decreases at a rate of 2.5 T/s. What is the

85. ## Physics -HELP

A rectangular coil 0.065 m by 0.080 m is positioned so that its cross-sectional area is perpendicular to the direction of a magnetic field. The coil has 66 turns and a total resistance of 7.6 Ω and the field decreases at a rate of 2.5 T/s. What is the

86. ## Physics -HELP

A coil with 337 turns of wire, a total resistance of 47 Ω, and a cross-sectional area of 0.35 m2 is positioned with its plane perpendicular to the field of a powerful electromagnet. What average current is induced in the coil during the 0.30 s that the

87. ## math

A bakery sells 5800 muffins in 2010. The bakery sells 7420 muffins in 2015. Write a linear model that represents the number y y of muffins that the bakery sells x x years after 2010

88. ## Math

Given that the line x/a + y/b = 1 passes through ( 0 , 3 ) and ( 5 , 1 ), find the value of a and b

89. ## Math

Solve for x: e^4x-3 = 2e^2x1 ln2x+6) - ln(3x-1) = ln(2) Then, simply the radicals

90. ## Math

What power output will be provided for an amplifier having a gain of 12dB if the power input is 75W?

91. ## literature

In The Call of the Wild" which dog is sled-team leader after the death of Spitz?

92. ## precalculus

Given: r = 4/-2-costheta What type of conic does this represent? ________________________________________ Circle Ellipse Hyperbola Parabola

93. ## Science Physics

I don't understand how I would know what would happen if it collided or bounced, etc. How do I solve a question like this? Suppose the total momentum of two masses before collision is 100kg m/s. What is the total momentum of the two masses after they

94. ## Physics

(a) If the wavelength of an electron is 5.37 ✕ 10−7 m, how fast is it moving? (b) If the electron has a speed equal to 3.80 ✕ 106 m/s, what is its wavelength? What equation should I use?

95. ## Chemistry Lab

So I have a lab exam tomorrow and our instructor said that one of the questions would be as follows: Prepare 100mL of 0.03 M Copper Sulfate, beginning from copper sulfate pentahydrate. Calculate the exact molarity to 3 sig figs. Alright so I understand how

96. ## chemistry

P4 + 6 Br2 -> 4PBr3 In a particular reaction, 20 grams of phosphorus P4, is combined with 50mL liquid bromine ( Density= 2.93 g/ml) 1) Calculate the mass of product in grams for each of the reactants 2) Limiting reagant and Mass Maximum mass of PBr3 so for

97. ## math

How many square feet of carpet will be needed to cover the kitchen and bedroom floors? 237.5 square feet 365 square feet 425 square feet 475 square feet

98. ## Social Studies

Why were Middle Colones more favorable to farmers than New England? Thanks in advance for any responses!