# Tracey

Popular questions and responses by Tracey
1. ## physical science

a weightlifter raises a 70 kg barbell from the floor to a height of 2.2m in 1.2s. What was his average power output during the lift?

2. ## chemistry

Write and balance the chemical reaction when gaseous carbon monoxide reacts with hydrogen gas to form gaseous methane (CH4) & liquid water

3. ## physical sciencei

is the work needed to bring a car's speed from 0 to 10 km/h less than, equal to or more then the work needed to bring its speed from 10 to 20 km/h? if the amounts of work are different, what is the ratio between them?

The birds "chirped" loudly every morning before sunrise. (1 point) action verb (THIS ONE) helping verb linking verb none of the above

5. ## physical science

a force of 20 N gives an object an acceleration of 5 m/s2. (a)What force would be needed to give the same object an acceleration of 1 m/s2. (b) what force would be needed to give an accelerattion of 10 m/s2 ?

6. ## statistics

Suppose X has a mound-shaped distribution with sigma=9. A random sample of size 36 has a sample mean 20. Is it appropriate to use a normal distribution to compute a confidence interval for the population mean u?

7. ## physical science

the 200g head of a golf club moves 40 m/s in a circular arc of 1.2m radius. How much force must the player exert on the handle of the club to prevent it from flying out of her hands at the bottom of the swing? ignore the mass of the clubs shaft.

8. ## PHYSICS

Search: a 1.0 kg mass weighs 9.8 n on earths surface and the radius of the earth is roughly 6.4x10 to the 6 m. what is the mass of the earth and the average density of Earth

9. ## chemistry

what is the volume occupied by 0.118 mol of helium gas at a pressure of 0.97 atm & temp of 32 C? R= 0.0821 L atm/mol K

10. ## Physics

Two spheres A and B, where A has twice the mass of B, are projected at the same horizontal velocity off the edge of two different height shelves. Sphere A leaves from a height of 2.0 m. Sphere B leaves a shelf 1.0 m off the floor. If both spheres leave the

11. ## eco

what factors could influence the suppy and demand of a correctional officer's position. Location of the prison/jail -- whether it's near a high crime area. The state's, county's, city's funds for jails -- whether they are releasing prisoners because of

12. ## college algebra

Determine the principal P that must be invested at rate r = 3 1 2 %, compounded monthly, so that \$700,000 will be available for retirement in t = 13 years. (Round your answer to the nearest cent.) P = \$

13. ## Chemistry

A buffer containing 0.2832 M of acid, HA, and 0.1504 M of its conjugate base, A−, has a pH of 2.36. What is the pH after 0.0015 mol NaOH is added to 0.5000 L of this solution?

14. ## PHYSICS

which has more inertia, a mouse or elephant?

15. ## chemistry

how many moles of butane gas c4h10 react to produce 3.50moles of water?

16. ## math

Class has 28 students. 23 like basketball. Also, 15 like baseball. 12 like both. How many students do not like either.

17. ## Chemistry

This is a mulit step problem How many grams of barium phosphate are produced from the reaction of 3.50g of sodium phosphate and 6.4g of barium nitrate? The other product is sodium nitrate. 1. Write the balanced equation for the reaction 2. How many grams

Solve the following by using the present value formula. Compound Amount- \$675 Term of Investment-15 months Nominal Rate (%)- 2.7 Interest Compounded quarterly Present Value ___________? Compound Interest _________?

19. ## Chemistry

I am having so much trouble understanding how to classify reactions as precipitation, acid base, or oxidation reduction. In one example in particular, it reads Iron II oxide reacts with oxygen and water to yield Iron III hydroxide. I wrote out the equation

20. ## English help

the date, time, and location of a robbery would most likely be included in? A feature article an editorial article a hard news article a letter to the editor I thought a featured article but really not sure

21. ## statistics

At a local college, 81 of the male students are smokers and 729 are non-smokers. Of the female students, 350 are smokers and 350 are non-smokers. A male student and a female student from the college are randomly selected for a survey. What is the

22. ## science

what is the relationship between a scientific law and scientific theory? what is the difference between a hypothesis and a theory?

Part I: As a financial planner a client comes to you for investment advice. After meeting with him and understanding his needs, you offer him the following two investment options: Option 1 (refer to section on Mathematics of Finance in your text.): Invest

24. ## physics

A projectile is launched straight upwards at 45 m/s. Three seconds later, its velocity is A. 75 m/s B. 30 m/s C. 15 m/s D. zero

25. ## Economics

Suppose that the price of a stock is \$50 at the beginning of a year and \$53 at the end of the year, and it pays a dividend of \$2 during the year. Calculate the stock’s current yield, capital-gains yield, and the return. Show your work for three separate

26. ## chemistry

Calculate the molar mass of baking powder (NH4)2CO3

27. ## math

find the unit rate 68 mi on 2 gal

28. ## Poetry

I am supposed to give a literal explanation of this poem, but I am really confused by it. Your help will be much appreciated. Snow & Ice by Quincy Troupe ice sheets sweep this slick mirrored dark place space as keys that turn in tight, trigger pain of

29. ## Writing

How can you determine a source's biases? You have to do some research. Sometimes it takes a while, as it is not obvious. Bias often takes the form of legality, in sanctions, sentences, and other official act. The root cause may be buried in deep personal

30. ## Math

You borrow \$1,200 at a rate of 4.5% for a period of 6 months. How much will you repay at the end of 6 months? A. \$27 B. \$54 C. \$1,173 D. \$1,227 I've been seeing a lot of controversy about whether the answer is C or D, and I'm very confused.

31. ## math

You are fitting a new kitchen and measure the following lengths of pipe. Subtract the shortest length from the longest. 0.81 m 1.08 m 0.8 m 180 cm 18 cm answer is m

32. ## english

Which of the following editing techniques helps keep screen direction constant

33. ## Math

A recipe calls for5oz of flour for every 4oz of milk. Let x be the amount of milk used. Let y be the amount of flour used. Express the relationship with an equation. Is the relationship proportional? If you use 14oz of milk, how much flour should you use?

Solve the following by using the present value formula. Compound Amount- \$700 Time Period(years)-8 years Nominal Rate (%)- 1.5 Interest Compounded monthly Compound Amount___________? Compound Interest _________?

35. ## science

Can you unscramble these two words? ACGIJJ 2nd word is KMNPKSU

36. ## Prealgebra

A Triangular piece of land has sides 20m, 25, and 20.5. Find the perimeter of the triangle. 20.25.20.5 = 65.5. P65.5 Is this right. Thank you!

37. ## Algebra

given that f(x) = 3x + 7 and g(x) = (-x)cubed + 1, find (fog)(-2)

38. ## math

Wanda bought a pair of jeans for \$32.50.She can purchase a second pair for 40% off the regular price.How much will she spend on two pair of jeans?

39. ## physics

Help: A 2 meter long, uniform bar with a mass of 46 kg is suspended from a pin so it can rotate freely. It is supported by a cable half a meter from the end. Find the tension force in the cable and the magnitude and direction of the reaction force at the

40. ## Physical Science HELP

What and how do I balance this if it needs to be done? Help please Balance the equation, if necessary, for the reaction between zinc and iodine. Zn + I2 „_ 2ZnI2

41. ## Math

A school has 30 rows of seats. Each row has 28 seats. How many seats are there?

42. ## science

Why scientists used only mice from the same pure-bred strain is so that

43. ## math

an airplane climbs at a rate of 66.8 feet per minute. It descends at twice the rate that it climbs. Assuming it descends at a constant rate, how many feet will the aitplane descend in 30 minutes.

44. ## english

explain how content purpose and audience and tone impact academic writing. not good in writing papers

45. ## algebra - absolute value

i'm doing absolute value in open sentences and then graphing them. how would you solve |t-4| > t-4 ?

46. ## Absolute Value in Open Sentences

For the problem |t-4|>t-4 how would you graph it?

47. ## Pre-cal

Two lookout towers are situated on mountain tops A and B, 4 mi from each other. A helicopter firefighting team is located in a valley at point C, 3 mi from A and 2 mi from B. Using the line between A and B as a reference, a lookout spots a fire at an angle

story was a little confusing... can someone give me a plot summary of Milk by Ron Carlson

49. ## algebra

A stone dropped from rest travels 160 ft the first 3 seconds. How far will it have fallen at the end of 5 seconds?

50. ## physical science

a 70 kg man and 50 kg woman are in a boat when its motor fails. the man dives into the water with a horizontal speed of 3 m/s in order to swim ashore. if he changes his mind, can he swim back to the boat if his swimming speed is 1 m/s? If not, can the

51. ## physical science

a yo-yo is swung in a vertical circle in such a way that its total energy KE and PE is constant. At what point in the circle is this speed maximum? A minumum? why? (b) if the yo-yo has a speed of 3 m/s at the top of the circl, whose radius is 80 cm, what

52. ## physical science

a 1kg object has kinetic energy of 1J when its speed is?

53. ## physical science

the acceleration of gravity on the surface of venus is 8.9 m/s2. would a ball thrown upward from venus return to the ground sooner or later than a ball thrown upward with the same speed on the earth?

54. ## math

f(17)=12 f(7)=6 f(x)=?

55. ## Honors Geometry

Topic: Distance in Coordinate Plane Determine the value(s) of n if... J(n, n+2), K(3n, n-1), JK=5

Envision that you run a highly successful tattoo and piercing parlor in a small West Coast city. You are fairly certain that between you and your key competitor, you have saturated your target audience of people in their teens and 20s. To grow your

57. ## physical science

how many square feet are there in an area of 1.00 square meters( 1 ft.=0.305)? use the proper number of significant figures in the answer.

58. ## science

describe the efficiency of energy tranfer and how the amount of energy available at each trophic level affects the structure of the ecosystem>

59. ## algebra

The area of a state is 7 times the area of another state. the sum of the areas are 32,000,000. what is the area of each state

60. ## Chemisty

If 59.0 mL of 0.40 M HI is mixed with 100. mL of 0.10 M KOH what is the resulting pH?

61. ## macroeconomics

if retiree benefits were frozen what would happen to total expenditures

62. ## Economics

One year ago, you bought a bond for \$10,000.00. You received interest of \$400.00 at the end of the year, as well as your \$10,000.00 principal. If the inflation rate over the last year was five percent, calculate the real return. Show your work.

63. ## science

Ho many millilitres of sucrose is needed to make 25 L of liquering soluton at 20% v/v

64. ## science

How many grams of copper sulfate is needed to make 1125L of 25 ppm solution

65. ## science

If 100g of CuSO4 took part in the following reaction how much Cu(0H)2 would be formed CuSO4 + 2NaOH to Na2SO4 + Cu(OH) 2

66. ## science

If 20g of Ca(0H)2 took part in the following reaction, how much CaCl2 would be formed. Ca(0H)2 + 2HCl to CaCl2 +2H20

3x² - 4 = 23

68. ## Science

As the angle between the direction of the applied force in the direction of movement increases from zero to ninety what happens to the fraction of the force that contributes to the work?

69. ## history

what is vigilantism and how and when does it arise? (political philosophy)

70. ## history

What system of government did Plato recommend in The Republic?

71. ## history

The three main ideals that all political systems strive to achieve are freedom order and equality. Why do these values compete with one another?

72. ## MATH

Five cards are dealt from a well-shuffled standard deck. using combinations, write an expresssion for the probability all are hearts

73. ## MATH

Five cards are dealt from a well-shuffled standard deck. using combinations, write an expresssion for the probability all are hearts

74. ## MATH

From a standard deck of cards, two cards are randomly drawn, one after the other without replacement. The color of each car is noted. Which is less likely to occur: two red cards or a red card and a black card? Explain.

75. ## hum/176

Overview of themes of the impact of the internet on politics

76. ## english

Which version of the American Dream is more realistic, Jay Gatsby or Tom Joad?

77. ## MATH

You purchased 150 ft. of chain that normally sells for \$0.15 per inch. You were charged \$22.50 for the sale. Was the price correct? If not, what is the correct price and what mistake was made?

78. ## math

Volume of Aluminum Foil. One cubic centimeter of aluminum weighs 2.7 grams. If a piece of aluminum foil weighs 5.4 grams, find the volume of the aluminum foil.

79. ## Math

If the following amounts of lumber need to be delivered to 2 different staging areas at 4 different job sites, how many total boards of each size will you need? 1.65:2x4s 2.45:2x8s 3.25:2x10s How to work this problem.

80. ## FAST MATH HELP

Need help problem solving-- A 500 space parking lot is packed with motorcycles and passenger cars, with only one vehicle in each space. How many motorcycles & cars r there if the total number of tires on the parked vehicles is 1650? I think I have to do

81. ## Math

Need help problem solving-- A 500 space parking lot is packed with motorcycles and passenger cars, with only one vehicle in each space. How many motorcycles & cars r there if the total number of tires on the parked vehicles is 1650? I think I have to do

82. ## Math

Need help problem solving-- A 500 space parking lot is packed with motorcycles and passenger cars, with only one vehicle in each space. How many motorcycles & cars r there if the total number of tires on the parked vehicles is 1650? I think I have to do

83. ## PHYSICS

what is the different between a scalar and vector?

84. ## budget and forecasting

Using the table “Gasoline Sales Time Series”, calculate the forecast for gasoline sales (in thousands) for Week 13 using a three day moving average. Gasoline Sales Time Series Week Sales (000’s of gallons) 1 17 2 21 3 19 4 23 5 18 6 16 7 20 8 18 9 22

85. ## Economics

One year ago, you bought a bond for \$10,000. You received interest of \$400 at the end of the year, as well as your \$10,000 principal. If the inflation rate over the last year was five percent, calculate the real return. Show your work

86. ## Economics

Explain how an economist could use the slope of the yield curve to analyze the probability that a recession will occur and why the spread may matter.

87. ## Chemistry

DrBob222 - can you set up the equation for the volume problem, i don't have a clue... Is this Charles Law? I know how to change C to K you add 273, but I don't know what figures go where in this formula PV=nRT......

88. ## chemistry

DrBob222 - for molar mass do you use significant figures? If so would the answer be 0.05 (3.55/65.39)3.55 has 3 SF's correct?

89. ## chemistry

What is the volume occupied by 0.118 mol of helium gas at a pressure of 0.97atm and a temperature of 32 degrees celius? R=0.0821 L atm/mol K

90. ## Chemistry

What is the amount in moles of 3.55g of zinc(Zn)

91. ## Social studies

How did the Peace of Augsburg affect the Catholic Church?

92. ## Chemistry

Consider the following electron configuration. (σ3s)2 (σ3s*)2 (σ3p)2 (π3p)4 (π3p*)4 Select four species that, in theory, would have this electron configuration.

93. ## francais

Please could you proof read my work. Thanks J'essaie de manger sainement, je mange 3 ou plus de fruit et légumes et un morceau de chocolat tons les jours. J'adore le fromage mais je connais gras. J'aime boire l'eau parce que saine. J'exerce

94. ## college

what are some of the changes the United States has made to policies concerning treatment of muslims and arabic members of society

95. ## Physics

Q: From the Bohr model of the Hydrogen atom, calculate the minimum amount of energy (in eV) an electron in the lowest orbital would need to free it from its proton (i.e., to ionize the atom). A: would I use the equation: En = - 13.6 / (n^2) ? If so, an an

96. ## Human resources management

17. Andy Liu is employed by National Electronics Company. He works on a team that manufactures the company’s best-selling TV from start to finish. Andy belongs to a _______ team. A. self-directed C. process-improvement B. project D. cross-functional

97. ## college

An HR manager’s duties can be grouped into the following categories: advice and counsel, service, policy formulation and implementation, and employee advocacy. In practice, these activities often overlap. For example, time spent counseling an employee

98. ## college

Biographical information blanks are difficult for applicants to fake because A. the questions don’t have predictable, correct answers. B. they require detailed answers. C. they’re administered by extremely knowledgeable interviewers. D. applicants are

99. ## Social Studies

How was/is the law and order kept in the society? We're learning about the government of Ancient Rome. Full Question: How was/is the law and order kept in the society of Ancient Rome and how did the government ensure the society would follow the law?