Joyce

Most popular questions and responses by Joyce
1. Physics

Maria throws a ball straight up with an initial velocity of 10 m/s. What is its velocity at the highest point? What is its velocity when it returned to the elevation from where it is thrown ? What is its acceleration at the highest point? What is its

2. math

If a basketball player consistently shoots 80% from the free throw line and she takes 25 free throw shots throughout the course of a game, how many free throws can she be expected to make?

3. physics

A softball having a mass of 0.25 kg is pitched at 95 km/h. By the time it reaches the plate it may have slowed 10%. neglecting gravity, estimate the average force of air resistance during a pitch. if the distance between the plate and the pitcher is about

4. Physics

a 63-kg water skier is pulled up a 14.0 degree incline by a ropeparallel to the incline with a tension of 512 N. the coefficient ofkinetic friction is 0.27. What are the magnitude and direction ofthe skier's acceleration

5. Chem

A beaker containing 25.0 mL of 0.360 M H2SO4 spills on the counter. How much baking soda, NaHCO3, will be needed to neutralize the acid? H2SO4 (aq) + 2 NaHCO3 (s) -> Na2SO4 (aq) + 2 H2CO3 (l) GIVEN: - I've converted 25.0 mL to 0.025 L H2SO4. - 0.360 M

6. UMA

math what is the answer to this 732,178+167-542,137

7. Math

Which of the following is the LARGEST unit of volume? Kiloliter or Hectoliter or Dekaliter or Deciliter

8. Science

what power is expended by a weightlifter when lifting a 60kg barbell a vertical distance of 1.1m in a time interval of 2.0s

9. physics

An ideal gas is confined to a container with adjustable volume. The pressure and mole number are constant. By what factor will volume change if absolute temperature doubles

10. statictics

According to classical test theory, if the observed variance of a test is 50 and the true variance is 40, what is the estimated reliability of the test? Answer a. 0.40 b. 0.50 c. 0.80 d. 0.90

11. science

describe an experiment to demonstrate that an expired air contains carbon dioxide

12. English

The new drug proved to be highly efective,it has no side effects. A. PROPERLY CONSTRUCTED SENTENCE B. COMMA SPLICE C. LACKS PARALLEL PARTS D. HAS UNCLEAR PRONOUN Please post your answer, and we'll discuss it. A Please check this site.

13. ENGLISH

Noah Webster,author of the original Webster's Dictionary,believed that a dictionaryshould contain more than the definitions of words;therefore,he included their etymologies as well. A. PROPERLY CONSTRUCTED SENTENCE B. DANGLER C. RUN-ON D. COMMA-SPLICE What

14. Physics

. Determine the temperature, T that results when 150 g of ice at 0°C is mixed with 300 g of water at 50°C. Given heat of fusion, l of water = 3.35 × 105 J/kg, cwater = 4186 J/kg∙oC.

15. Science

How do u make this in a lewis dot structure? C2H3Cl3

16. physics kinetic energy

a) if a particle's speed decreases by a factor of four, by what factor does its kinetic energy change? b) particle A has three times the mass and twice the kinetic energy of particle B. What is the speed ratio VA / VB?

17. Physics

A 100 kg. man decides to go bungee jumping off a bridge. The bungee cord has a relaxed length of 10.0 m, and acts as a perfect spring with a stiffness constant of 80 N/m. What is the maximum distance below the bridge that he will reach? (he will fall 10.0

18. Life orantation

Description of recent service delivery protests

19. physics help

1. A roller coaster car starts from rest and rolls down a frictionless track, reaching speed fv at the bottom. a. If you want the car to go two times as fast at the bottom, by what factor must you increase the height of the track? b. Does your answer to

20. Physics

A bridge that was 5.0m long has been washed out by the rain several days ago. How fast must a car be going to successfully jump the stream? Although the road is level on both sides of the bridge, the road on the far side is 2.0m lower than the road on this

21. math

One hundred meters of fencing is available to enclose a rectangular area next to a river. Give a function A that can represent the area that can be enclosed in terms of x. Function : A = Answer x2 + Answer x

22. math

The cost of manufacturing a semi-circular window is the cost of the glass pane together with the cost of the framing material. When ordering this window, a customer specifies the length of the base of the window, shown as l l . If the cost of the framing

23. Math

The length of the side QR of a triangle PQR is 14.5cm

24. phsyics

an 8g bullet is shot into a 4kg block at rest on a frictionless horizontal surface. the bullet remains lodged in the block. the block movies into a spring and compresses it by 3cm. the force constant of the spring is 1500N/m. the initial speed of the

25. Math 7th

A meteorologist predicts an 80% chance of rain. Is this an example of experimental probability? Please explain why

26. math

Lexi and Marie had \$250 altogether. After Lexi spent 2/5 of her money and Marie spent \$40, they had the same amount of money left. how much money did Lexi have in the beginning ?

27. Electric field

when an electron is accelerated through a potential difference of 1 V, the kinetic energy at the end of the field is?

28. eng/135

Revising Messages: Conciseness Revise the following sentences, using shorter, simpler words. 9. The antiquated calculator is ineffectual for solving sophisticated problems

29. Linear equations

Please help me solve this problem- Find an equation for the line perpendicular to 6x+2y=-2 having the same y-intercept as -4x-3y=6

30. college math

cannot figure out the probability for the following: A pea plant i=must have exactly on of each of the following pairs of transis: Short(s) or tall(t); round(r) or wrinkled(w)seeds; yellow(y) or green(g)peas; and white(wh) or purple(p) flowers so A) How

31. physics

A stone is dropped off the science building and accelerates, from rest, toward the ground at 9.8 m/s/s. A curious physics student looks out the third floor window as the stone falls past. She happens to have a stopwatch and she finds that it takes 0.30 sec

32. math

a piece of carpetis in the shape of an isosceles trapezoid with a height of 30 inches and bases 40 and 60 inches. what is the area of the carpet?

33. college math

The atmospheric pressure P in pounds per square inch (psi) is given by the formula below, where a is the altitude above sea level (in miles). If a city has an atmospheric pressure of 13.25 psi, what is its altitude? (Recall that 1 mi = 5,280 ft. Round your

34. 1 more phyiscs for today

sorry for asking for help agen. a baseball catcher puts on an exhibition by catching a .150kg ball dropped from a helicopter at a height of 100m above the catcher. if the catcher "gives with the ball for a distance of .75m while catching it, what average

35. Human Resources

Can you think of any cultural problems U.S. hospitals might encounter as a result of recruiting nurses abroad?

36. Physics- Ballistic pendulum

A simple pendulum is made from a 2 kg. block of wood suspended from a light cord of length 1 m. When the pendulum is hanging in such a way that it is stationary and vertical, a bullet is shot horizontally into the block of wood where it sticks. The bullet

37. Finance

I am borrowing \$ 10,000 for 5 years at 7% . Payments are made on a monthly basis and are determined using the add- on method. 1: How much total interest will I pay on the loan if I held it for the full 5 year term ? 2 : What would my monthly payments be

38. Physics

At the moment car A starts from rest and accelerates at 4.0 m/s^2, car B passes it, moving at a constant speed of 28 m/s. how long will it take car A to catch up with car B?

39. Finance

An investor is thinking about buying some shares of a company at \$ 75 a share. She expects the stock to rise to \$ 115 a share over the next 3 years. During that time, she also expects to receive annual dividends at \$ 4 a share. Assuming that the future

40. psychology

The researcher's question of correlation between the cost of beer and the number of calories it contains? The researcher's question of correlation between the cost of beer and the volume of alcohol it contains?

My school is planning a Math Fair. Each grade will compete with same grade team members. The rules are: TO make it fun and use Al. math strands . The problem is I don't know where or how to begin this project. Can anyone help?

42. math

from a group of women and 4 men, determine in how many ways a committee of people can be selected with no restrictions? b. 4 women c. 3 women and 1 men d. 2 women 2 man e. 4 men

43. math,eng,phy,chem,bio,geography,economics

if 8.99g of scandium and 8.99g of oxygen react to give scandium oxide and a leftover of oxygen 3.65g. what percentage of scandium oxide is the oxygen

44. math

Which point on the circle x^2+y^2-12x-4y=50 is closest to the origin? Which point is farthest from the origin? Explain.

As a business owner, information can be one of your key assets. why must you,as a business owner manage information as a resource? How might the internet and related communication technology change your business? What are some of the ways that information

46. Maths

The cash price of a gas cooker is sh. 9000, a customer bought the cooking gas by 15 monthly instalments of sh. 950 each installment. Calculate the carryin charge

47. Math

Write an inequality for the following. A swimmer dove off a 25 ft. Platform. He submerged 14 feet below the water.

48. Chemistry

A sample of toluene, C7H8 has a mass of 74.5 g. How many carbon atoms does it contain? How many hydrogen atoms does it contain? My work: I get 3.41 x 10^24 for carbon atoms And 3.90 x 10^24 for hydrogen atoms. Is this correct?

49. math

Corey needs 24 boards that are 47 1/2 inches long. How many feet of boards should he buy explain.

50. physical chemistry

a mixture of toluene and water boils at 90 degrees. calculate the vapour pressure at this temperature. Assume the atmospheric pressure to be 760 mmHg

52. algebra

why can’t we simplify 3x2+4x any further. If you were to incorrectly simplify this expression into a single term, what would that single term look like? Now, pick 1 or 2 numbers to plug in for “x” in 3x2+4x and your incorrectly-simplified single term

53. chemistry

identify and show the bond in the formation of the following; AsH3 BaO BCL3 SO2 ZnC2 CL2 K2S PH3 PLS I NEED AN ANSWER THANKS

54. cost accounting

fixed cost relating to staging a concert are 350,000. variable cost per patron are \$5.00. the selling price for a tickets \$25.00. The blue Saints band has sold 23,000 tickets so far. How many ticket does the Blue Saints band need to sell to achieve net

55. IV calculations-medical math

Heparin is to infuse at 9ml/hr. the IV solution is 25,000units heparin in 250cc D5w. what is the hourly dosage? what is the drip rate?

56. Math

Can some one explain these to me i need the factors. i am totally lost. thanks x^2+x-6 x^2+7x+10 x^2+5x+6 x^2+2xy+15y^2

57. Math

x^2+6x+27 m^2-m-12

58. math

Direct variation An airplane is traveling at a constant rate of 450 mi/h. Write an equation that shows how far the plane travels (D) in h hours. D = V * h = 450 h V is the speed, 450 miles/hour

59. English

What,if anything,is wrong with the following sentence? Do you see the pretty girl standing next to the car with the red boots on? 1. properly constructed sentence 2. misplaced part 3. run-on 4. fragment I THINK THE CORRECT ANSWER IS:Number 1 Am I Correct?

What,if anything,is wrong with this sentence? Do you advise me to go to college or that I should get a job after high school? A. Properly constructed sentence B. Misplaced part C. Lacks parallel parts D. Run-on I think the answer is C, am I CORRECT? Joyce,

61. English

What,if anything, is wrong with this sentence? To be fit,you should get enough sleep, exercise regulary,and eat a healthy diet. 1.properly constructed sentence 2. comma splice 3.Lacks parallel parts 4.Unclear pronoun That sentence looks fine to me.

62. math,eng,phy,chem,bio,geography,economics

in an experiment of oxgen to hydrogen in water molecule. 9g of iron were heated in a current of hydrogen,6.5g of iron and 2.8g of water were formed using this data. determine the proportion by mass of oxygen to hydrogen in water

63. Van de graaf question

A moving belt in a van de graaf generator transfers charge from one point to another. If the belt is 0.1 m. wide, moves with a velocity of 10 m/s and carries a surface charge of +10^-5 C/m^2, determine the current that this generator represents.

64. Electric field

In a simple electric circuit 1.6 J of energy are supplied to a lamp in 0.10 s. The charge transferred through the circuit is o.20 C. The average current is?

65. Math

Diagram of a triangle PQR when QR is 14.5

66. Math

can someone please help me with the answer to this question? What payment should be made on the invoice in the amount of \$ 3,400.00 dated Aug 7 if the terms of sale are 3/15, 2/30,n/45 and the bill is paid Aug 19?

An invoice is dated Aug 29 with terms of 4/15 E.O.M. What is the discount date and net date ?

68. Math

What is the sum of the first 40 consecutive odd numbers?

69. Algebra

John rented a van for \$250 for the week plus \$.20 a mile. How far can John driveifhe only wants to spend a totalof \$325? Write an inequality. Solve

70. cost accounting

market a new product for 2.00 a unit. fixed costs to manufacture this product are 100,000. the contribution margin is 40 percent. how many units must be sold to realize net income of 100,00 from this product?

71. Cost accounting

The company is planning to sell product z for \$10 a unit. Variable costs are \$6 a unit and fixed cost are \$100,000. What must total sales be to break even?

72. algebra

-6q^2 -40q - 50 how do you solve this i am factoring and having problems

73. chemistry

what makes a good buffer? is it that it has a strong base and a strong acid? and why is blood a good buffer? is that because the oxygen it carries acts as a strong base?

solve for n if P(n,3)=2c(n,2), n{N

75. Electric field

The acceleration of an electron in an electric field with a strength of 7.0 N/C is?

76. programming

Peter decided to save money to buy a house. Enter this amount as well as the amount he will be able to save each month. He earns 0.8% interest per month while the amount is less than R70,000 and 0,7% interest per month if the amount is equal to or more

77. Math

does anyone know how to find the answer to the following questions: An invoice is dated Aug 29 with terms of 4/15 E.O.M. What is the discount date and the net date ?

78. algebra

At local community college, it costs \$150 to enroll in a morning section of an algebra course. Suppose that the variable n stands for the number of students who enroll. Then 150n stands for the total amount of money collected for this course. How much is

79. math

a liscence plate for a car must consist of a letter followed by two numbers. Each letter mus be an R, U or N. Each number must be a 2 or 6. Repetition of digits is permitted. Use the counting principle to determine the number of points in the sample.

80. math

if an angle has 40DEGREES and 80 dgrees what is the missing number?

81. College Algebra

Carl had packed 6 crates by 8 a.m. By 11 a.m., he had packed 24 crates. Find the average rate of change in crates packed from 8 a.m. to 11 a.m.

82. algebra

A roof rises 1.4 feet vertically and 11.8 feet horizontally. What is the grade of the roof? The grade of the roof is _____% how do I begin to find the answer to this

83. cost accounting

it a medium-size manufacturer of bicycles. during the year a new line call "Radical" was made available to Frank customers. The break-even point for sales of Radical is 250,000 with a contrbution margin ratio of 40 percent. Assuming that the profit for the

84. accounting

O'Hara Inc. made sales of \$310,000 during 2008, it's first year of operations. Of this, \$15,000 remained in accounts receivable at the end of the year. Additionally, the company paid and incurred \$270,000 in expenses during the year. The company also

85. Accounting

Carpaitha Inc began 2009 with \$140,000 in cash. The company plans to have \$1,400,000 accrual basis sales revenue during the year, of which it plans to collect 80% in 2009 and the other 20% in 2010. The company plans to record the following expenses in

86. algebra

simplify 4(3x-(3-5y+7x)+3y

87. Algebra

I am working on Factoring the Trinomial and need help to solve this equation: t=3t^3+22t^2+8t

88. algebra

Height difference. A red ball and a green ball are simultaneously tossed into the air. The red ball is given an initial velocity of 96 feet per second, and its height t seconds after it is tossed is 16t2  96t feet. The green ball is given an initial

I need help understandinddifferent ethics duty-based, consequence-based, rights-based, human nature, relativistic and entitlement-based

90. accounting/220

help with acc/220 week 9 fubak oroject Business plan

91. science 275

do you believe that humans can harvest forest resources in an environmentally frindly way? or, should national forest be left in their natural state in which resources are not used to benefit humans?

92. Math

If an item was purchased at \$112.00 dollars after a 20% discount what was the original price of the item. I know the answer is 140.00 but I to know the formula that is used to get that answer. Thanks The \$112 you are paying represents 80% of the original

93. math

How many acres will a 1.3 cu feet per second irrigate

94. Algebra

Hello...can you please let me know if I worked this problem correctly: 10Z2^ + 8z - 7 = 16z2^ + 48z - 12 0 = 6z2^ + 30z - 5 a = 6 b = 30 c = -5 x = 30 + or - (30 2^ -4(6)(-5) / 12 x = -30 + 31.937 / 12 = .161 x = -30 - 31.937 / 12 -5.161 Am I on the right

95. Math

A room measured 6 feet wide and 14 feet long. If they use blue and white tiles that are exactly 1 square foot, how many tiles will they need

96. Electric field

A 9.0 V potential difference exists between two metal plates which are 1.8 x 10^-3 m. apart. The acceleration of an electron that enters the region between these plates will be?

97. Electric field

The potential difference between the anode and the cathode of a vacuum tube is 2.0 x 10^2 V. Free electrons originate at the cathode with negligible speed and move to the anode. The speed with which the electrons arrive at the anode is?

98. physics

At a distance of 2.0 m. from a +8.0 x 10^-6 C charge, the magnitude and direction of the electric field will be?

99. Physics

A stone mass M thrown straight up with initial velocity V reaches a height H. A second stone of mass 2M, thrown straight up with an initial velocity 2V. What will be its height?