1. Physics

A horizontal rope is tied to a 45.0kg box on frictionless ice. What is the tension in the rope if: A) The box is at rest? B) The box moves at a steady vx = 4.40m/s ? C) The box vx = 4.40m/s and ax = 4.60m/s2 ?

2. Physics

Sam, whose mass is 76kg , takes off across level snow on his jet-powered skis. The skis have a thrust of 220N and a coefficient of kinetic friction on snow of 0.1. Unfortunately, the skis run out of fuel after only 15s . How far has Sam traveled when he

3. Economics (36)

For borrowers with good credit scores, the mean debt for revolving and installment accounts is \$15,015 (BusinessWeek, March 20, 2006). Assume the standard deviation is \$3,730 and that debt amounts are normally distributed. a. What is the probability that

4. Physics

Bob is pulling a 30kg filing cabinet with a force of 200N , but the filing cabinet refuses to move. The coefficient of static friction between the filing cabinet and the floor is 0.80. What is the magnitude of the friction force on the filing cabinet?

5. Economics (42)

Consumption of alcoholic beverages by young women of drinking age has been increasing in the United Kingdom, the United States, and Europe (The Wall Street Journal, February 15, 2006). Data (annual consumption in liters) consistent with the findings

6. Lifo Orientation

Critically discuss six ways in which Xenophobia impacts on individuals, groups as well as on your community?

7. chemistry

Consider the following system, which is at equilibrium, 3C(s) + 3 H2(g) mc020-1.jpg CH4(g) + C2H2(g) The result of removing some C(s) from the system is that a) more CH4(g) and C2H2(g) are produced to replace that which is removed. b) Kc decreases. c) more

8. Physics

In the figure, a uniform ladder of weight 200 N and length 10 m leans against a perfectly smooth wall. A firefighter of weight 600 N climbs a distance x up the ladder. The coefficient of static friction between the ladder and the floor is 0.50. What is the

9. chemistry, first year university

Solid NH4N3 decomposes explosively according to the following equation: NH4N3(s) ⇌ 2N2(g) + 2H2(g) A small amount of ammonium azide was placed in a sealed container and the air was removed. The sample was then detonated. At equilibrium the total pressure

10. Math

A spinner numbered 1-10 is spun. what is the probability of spinning a multiple of 3 and a multiple of 2?

11. Science

How do I draw a particle diagram to show how ear defenders work?

12. Algebra

You are one of the ﬁnalists at a science fair. The scores of the other finalists are 87, 89, 81, 85, 87, 83, 86, 94, 90, 97, 80, 89, 85, and 88. Write an inequality that represents your possible scores if your percentile rank is 80.

13. chemistry

Answer the following math questions focusing on significant figures a. 45.3L x 10 mol/L = b. 67.894 g ÷ 2.56 L = c. 45.3m + 12.344m + 1000m – 1.34m = d. 35cm + 8.3m + 75.341 km + 80,000 mm = e. (43.7m + 39.3cm) ÷ 25.332 m/s =

14. MATH

A hockey game is preparing for a group photo. The team has 1 goalie, 4 defense, and 7 forwards. The photographer wants two rows of six players. How many ways can the team arrange six players in the front row with at most 2 defense?

15. physics

A car moves along an x axis through a distance of 900 m, starting at rest (at x = 0) and ending at rest (at x = 900 m). Through the first ¼ of that distance, its acceleration is +2.25 m/s2 . Through the rest of that distance, its acceleration is – 0.750

16. Chemistry

How can I determine the overall electrochemical reaction that proceeds spontaneously? Cd2+ | Cd, Co2+ | Co 1. Cd+Co2+ −¨Cd2++Co 2. Co+Cd2+ −¨Co2++Cd (1. and 2. are answer choices)

17. english

English is the language of opportunity.why bother to teach indegenous languages

18. physics

24 joule work is done in moving a charge of 6c between two points. Calculate potential difference between this two points.

19. chemistry

What is the energy released when steam at 25 g of steam at 10 degree celcius is cooled to ice at-10 degree celcius work heat change for the following changes calculated 150 degree Celsius steam --150 degree water 150 degree water to 0 degree water 100

20. Aths

Suppose you are an astronaut spacewalking outside your spacecraft to repair a broken part. In fixing the part, you have drifted several meters from your spacecraft. You are now at rest and are still holding a bag filled with tools. How could you return to

21. Math

Is the following sequence a arithmetic,geometric or neither? 1.6, .8, .4, .2 my answer is geometric

22. Physics

A ball with a mass of 12 g is moving at 15 m/s. It collides with a second ball with a mass of 36 g moving at 5 m/s in the same direction. After the collision, the 12-g ball moves at 6.0 m/s. How great is the change in momentum of the z36-g ball?

23. Math

A Canadian zoo started with 16 whooping cranes and planned to hatch 20 chicks a year. A few birds were kept for breeding and the rest released into the wild. At the end of last year, a total of 136 cranes had spent some time in the zoo. If the pattern

24. Astronomy

Imagine that you have found an object out in space. When you use the inverse square law to compute its luminosity, you get a ridiculously large value. You therefore suspect that relativistic beaming is at work - the radiation is coming from a jet traveling

25. Chemistry

Given the Na+/Na and K+/K half-cells, determine the overall electrochemical reaction that proceeds spontaneously and the E0 value. Answer in units of V Can you please explain the steps?

26. Social Studies

Why was the united states interested in claiming the Oregon Country? Is it because they just wanted to expand their land even more?

Amazon rain forest

28. Physics

design a pair of ear defenders and explain how they work using big idea of energy transfer

29. Chemistry help

I am not to sure how to approach the problem... Hydrazine is used as a rocket fuel because its reaction with oxygen is extremely exothermic: N2H4(liquid) + O2(g) ==> N2(g) + 2H2O(liquid) ΔH(reaction) = -615 kJ mol-1 What is the enthalpy of this reaction

30. Math

A spherical balloon with a surface area of 36pi square inches is inflated further until its diameter has increased by 50%. The surface area of the balloon is now? I know the formula for surface area is A=4pi*r squared. I don't understand how you can figure

31. math

Aplane is flying at an altitude of 12000m from the pilot the angle of depression tothe airport toweris32 degrees how far is the tower from a point directly beneath the plane

32. Art

What is value? • the lightness or darkness of a color • the intensity of a color • the number of colors being used in a 2D artwork • the difference between two colors

33. chemistry

Radioactive decay is a process that follows first-order kinetics. The half-life of 32P is 0.03920 years; how long (in minutes) would it take for the amount of 32P to decrease to 53.25% of its initial amount? I don't understand at all what to do here

34. Math

Simplify 4sqrt6/sqrt30 by rationalizing the denominator

35. Math

Using the table below is it a linear function? x -2, -1, 0, 1, 2 y -7, 1, 8, 17, 25 my answer is that it is a linear function rule: x = -1 y = -8,-9,-7, -8 I think the rule is y= 8 X+8

36. Statistics

A researcher believes that the percentage of people who exercise in California is greater than the national exercise rate. The national rate is 20%. The researcher gathers a random sample of 120 individuals who live in California and finds that the number

37. 8th U.S History DBQ - Pls check my answer!!!

Document 3 - In 1912, Washington Gladden, an influential white minister from Columbus, Ohio and Washington support asked Booker T. Washington to state his position on woman suffrage. Washington replied: I think you have expressed my own attitude very fully

38. algebra

An artifact was found and tested for its carbon-14 content. If 75% of the original carbon-14 was still present, what is its probable age (to the nearest 100 years)? (Carbon-14 has a half-life of 5,730 years.) thank you

39. Algebra

You are one of the ﬁnalists at a science fair. The scores of the other finalists are 87, 89, 81, 85, 87, 83, 86, 94, 90, 97, 80, 89, 85, and 88. Write an inequality that represents your possible scores if your percentile rank is 80.

40. math

I have to find the area of a kite. I am only given part of the longest diagonal (12 cm) and half of the other diagonal (9 cm). I know the formula is diagonal 1 times diagonal 2 times 1/2. I have the length for one diagonal which is 18 cm b/c 9+9. How can

41. grammar

Have you seen my sister Karla around here today? Have you seen my sister, Karla around here today? Have you seen my sister, Karla, around here today?

42. Algebra

A bag contains 7 blue, 5 purple, 12 red and 6 orange marbles. Find the probability, if you draw one marble at random from the bag. Select the simplest form. P(not blue)

43. physical

24 joule work is done in moving a charge of 6c between two points. Calculate potential difference between this two points.

44. english

Im trying to learn this sensory imagery thing. Please check i think its B. Which sentence below best demonstrates sensory imagery? A.There were cameras flashing everywhere and the exicited voices of the helpers probably scared him even more. B.we drove

45. personal finance

Bryan earns \$6.25 per hour plus 1.75% commission on all goods sold. One week he worked 37 hours and sold \$6,500 worth of goods. What were his weekly earnings?

46. math

A) which is the better value a 12 ounce jar of honey for \$2.25 or an 18 ounce jar of honey for \$3.24? B) the supermarket displays the unit price for the 12 ounce jar in terms of cost per ounce, but displays the unit price for the 18 ounce jar in terms of

47. English

1. I will opened the door. 2. The door will be opened by me. 3. The door shall be opened by me. (What is the passive form of Sentence 1?)

48. (2-8) Chemistry - Science (Dr. Bob222)

Which of the following statements is correct? A) The internal energy of a system increases when more work is done by the system than the heat that flows into the system. B) The system does work on the surroundings when an ideal gas expands against a

49. Chemistry Who step by step

A 0.8870g sample of a mixture of nacl and nan03 is dissolved in water, and the solution is then treated with an excess of AGN03 to yield 1.913g of agcl. Calculate the percent by mass of the nacl in the mixture. 1.913g / 143 = 0.0133 x/58 ( 0.8870g -x) y/85

50. Calc

A patient receives a 3 ml dose of medicine. The amount, y, of medicine in the body decreases at a rate of 15% per hour (dy/dt=-.15y). When the medicine in the patient is down to 1 ml, the nurse administers a second 3 ml dose and plans to give the patient a

51. Social Studies

Briefly describe one way that these cultures changed the geography of the paces to which they migrated. 1. the ancient Romans who conquered much of Europe and England 2. homesteading families who migrated to the western territories of North America 3.

52. Math

An artist is designing the rectangular wire structure with four rectangles drawn inside. The artist has a 12 meter length of wire. If the entire area of the figure is to be maximized, what should be the length of X? I know the formula for area of a

53. Social Studies

Did the Marbury v. Madison case affect the power of the judicial branch by helping establish the Supreme Courts' power to check the power of the other branches of the government?

54. Chemistry 104

The pH of 0.3 HSO3- is: (How can this problem be solved?) The final answer is 4.41 However, I keep getting 3.76

55. Astronomy

Imagine that you are an astronomer, and you are planning to do a survey to find new brown-dwarf stars. You need to calculate how sensitive your search needs to be (and hence how big a telescope you will need and how long the survey will take). You want to

56. algebra

θhe height h in feet of a car above the exit ramp of an amusement park′s free-fall ride can be modled by the equation h=−16t 6+s where t is the time in seconds after the car drops s is the starting height of the car in feet. How high above the car′s

57. Math

Solve for 5 X 3 to the nth,. my answer is 15, 45, 135, 405

58. math

Trail mix is sold in 1-pound bags. Mary will buy some trail mix and re-package it so that each of the 15 members of her hiking club gets one 25_ -pound bag. How many 1-pound bags of trail mix should Mary buy to have enough trail mix without leftovers?

59. math

5x5+5x5+5-5x5=750 How are people getting 30?

60. algebra

The learning curves describes the rate at which a person learns certain tasks. If person sets a goal of typing N words per minute (wpm), the length of time t (in days) to achieve this goal is given by a) according to this formula what is the maximum number

61. Economic/ Accounting

what are welfare payments or consumer subsidies

62. Math

Canada ranks fifth in the world in the production of gold. By the end of one year, one of Canada's mines had produced about 198 t of gold since it opened. if the annual production averaged 4.5 t, predict the total production by the end of next year and the

63. chemistry

how many significant figures do the following numbers have? a. 1.2056 x 10^4 m: b. 1 x 10^89 km: c. 12,000 L: d. 0.000345 cm: e. 1.00036 mL: f. 0.2056000 m:

64. Math!!!

Equation for - the crafts club made 102 wooden train cars. There are 6 cars to a set. How many sets were made?

65. math

A architect is designing a house. The scale on the plan is 1 inch=6 feet. If the house is to have a length of 90 feet and a width of 30 feet, how long will the line representing the house's length on the blue print

66. Astronomy

Imagine that you are a particle physicist, and you have come up with a theory that some gamma-ray bursts come from the decay of a new and exotic sub-atomic particle that you think might exist. You calculated that if this particle really does exist and

67. Algebra

Find the first and third quartiles of the data set. 1, 5, 1, 2.5, 3, 2, 3.5, 2, 3, 1.5, 4, 2, 4, 1, 3, 4.5

68. math

If Tom buys a red skateboard, then Anne buys pink in-line skates." Which statement below is logically equivalent?

69. social studies

The mock wars which were held in Louisiana were directed by ______ and ______

70. 8th History DBQ - Pls check my answer, thx!!!

Document 7: W. E. B. Du Bois publicly embraced the cause of woman suffrage after he moved north in 1907. The signs of awakening womanhood in the world to-day are legion. The best novelists are women. Some of the keenest essayists and graceful writers of

71. math

. The nominal interest rate on your account is 7%; your semi-annually effective rate of interest (APY) will be

72. ALGEBRA

the atmosphere pressure P in pounds per square inch (psi) is given by P=14.7e upper o.21a where a is the attitude above sea level in miles. If a city has an atmosphere pressure y 13.29 psi what is its altitude. Recall that one mile = 5,280 feet. Round to

original concept of the american dream

74. History

What are the regional interests for Newfoundland, Prince Edward Island, Nova Scotia, New Brunswick.

75. math

Can u please make an equation for this? : the club members need 686 cm of denim for rag dolls. They need 438 cm of denim for bean bags. How much denim is needed in all?

76. Math

Is y= -3 x squared +x a quadratic function?

77. life science

Why do human don't contain Chlorophyll to make photosynthesis and They get Energy but they don't contain chloroplast like a Pallisade Mesophyll ??

78. chemistry

Why is it recommended to carry out iodometric titration as quickly as positive and to get the first end point?

79. math

What is the value of the expression a / uv if a, u, and v are each doubled 1. multiplied by 2 2. multiplied by 3. divided by 2 4. divided by 4 5. left unchanged

80. History: World War 1

Hi beautiful people. I am struggling to find a primary source to back up the oft cited claim that Germany was not allowed into the League of Nations. Given that the covenant itself contains no such proscriptions and I am not finding it in the Treaty of

perils of the amazon rain forest

82. Compensation Management

which of the following statements is best descriptive of why many suggestion plans have failed

83. chemistry

Write equations for the ionisation in water of : A) hydrobromic acid B) nitrous acid C) carbonic acid D) sulfuric acid

84. English

Give an example of imagery from act 5 in Romeo and Juliet

85. Calculus

For the parabola y^2=4px, where p, the focal length, is a constant, the focal point, f(p,0), is on the x-axis. Point S is 10 units from the point F and the segment SF makes a 60degree angle with the x-axis. The slope of segment TF is twice the negative of

86. chemistry

A solution is made by dissolving 811.0 cg of barium hydroxide, Ba(OH)2, in 0.1137 kg of water. What is the concentration in parts per million? I know the equation is: ppm= (mass of solute/mass of solution)10^6 Does the mass need to be in g or kg?

87. algebra

The first angle of a triangle is 23° more than the 2nd angle. The 3rd angle of a triangle is 6 times the 2nd angle. Use X to represent the unknown value

88. Chemistry

if you produce 5.7 of H2O, how many liters of O2 will be required?

89. ALGEBRA

t = - 6.25 In ( 1 N over 80) according to the formula what is the maximum number of word per minute. Round off to the nearest whole number. Solve N

90. algebra

Write the equations in logarithmic form. 25=(1/5)^2 thanks for the help.

91. Physics HELP!!!!!!!!

Suppose 0.021 mole of an ideal monatomic gas has a pressure of 1.00 atm at 273.15 K and is then cooled at constant pressure until its volume is reduced by 41.1 %. What is the amount of work done by the gas?

93. Math

If you have the following points for X and Y what is the linear function rule? x = 4, 1 y = 2, -4 I think it is 1/2 x but I'm not sure if it is +6 or - 6

95. Math!!!

Jim bought 1520 g of beans. He used all the beans to make 16 bean bags. How many hrams of beans did he use for each bean bag? - equation format please!

96. Math

Write a function rule for the following table. x 2 4 6 y 1 0 -1

97. Math

The function rule C= 10 n + 26 where n = number of people and c = cost of party. Show a table if 27,39 , & 43 people go. My answer is the following n 27 39 43 c 296 416 456

98. math

0.0357 x # = 357 x 2,# = 1. 200 2. 200,000 3. 2,000 4. 20,000 5. 7,140

99. PHI 103

This is not the best of all possible worlds, because the best of all possible worlds would not contain suffering, and this world contains much suffering

100. Math

Solve the following 2a(a squared+4a)

101. English

1. They made coins from gold and silver. 2. They made coins of gold and silver. 3. They made coins out of gold and silver. (Which ones are grammatical?)

102. chem

The normal boiling point of Ta is 5425°C. What is its vapor pressure in mm Hg at 4384°C, if its heat of vaporization is 781.0 kJ/mol? Do I use the Clausius-clapeyron equation?

103. American History

What was the role of the northwest ordinance and what was its effect on the banning of slavery?