annette

Most popular questions and responses by annette
1. Physics

a 5kg block is pushed 3m up a vertical wall with constant speed by a constant force of magnitude f applied at an angle of 30 degrees with the horizontal. if the coefficient of kinetic friction between block and wall is .3, determine the work done by a) f

2. physics

A 79-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.8 s. (a) Calculate the mechanical work done by the sprinter during this time. J (b) Calculate the average power the sprinter must generate. W (c) If the sprinter converts food energy to

3. physics 70

A .275 kg. object is swung in a vertical circular path on a string .850 m. long. A) What are the forces acting on the ball at any point along this path? B) Draw free-body diagrams for the ball when it is at the bottom of the circle and when it is at the

4. Physics

Two blocks of masses m1 = 2kg. and m2 = 4kg. are each released from rest at a height of h = 5m. on a frictionless track, and undergo an elastic head-on collision. a)Determine the velocity of each block just before the collision. b) Determine the velocity

5. english

what is the object pronoun of this sentence? the thief stole the expensive diamonds. should it be the thief stole them.

6. statistics

A sample of 352 subscribers to Wired magazine shows the mean time spent using the Internet is 13.4 hours per week, with a sample standard deviation of 6.8 hours. Find the 95 percent confidence interval for the mean time Wired subscribers spend on the

7. Chemistry 152

to obtain the rate of the reaction 5Br-(aq) +BrO3- (aq) + 6H+ (aq) ---3Br2(aq) + 3H2O(l) you might follow the Br concentration or the BrO concentration.How are the rates in terms of these species related?

8. math

Josh has 5/8 of a foot of plywood. To finish building the deck, he needs five time that amount. How many feet of plywood does Josh need? A.) 3 feet B.) 3 1/2 feet C.) 3 1/8 feet D.) 3 2/9 feet

9. Chemistry

Calculate the volume of concentrated reagent required to prepare the diluted solutions indicated: (a) 18 M H2SO4 to prepare 225 mL of 2.0 M H2SO4 (

10. physics

A 79-kg sprinter accelerates from rest to a speed of 11.0 m/s in 4.8 s. (a) Calculate the mechanical work done by the sprinter during this time. J (b) Calculate the average power the sprinter must generate. W (c) If the sprinter converts food energy to

11. math

Ms. Johnson's class is having a pizza party. If there are 14 students and 7 pizzas cut into 8 slices, what answer choice represents the fraction of one pizza that each student receives? A.) 1/3 B.) 1/4 C.) 1/2 D.) 1/8

12. physics

An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done on the gas as the

13. physics

A 100 g aluminum calorimeter contains 250 g of water. The two substances are in thermal equilibrium at 10°C. Two metallic blocks are placed in the water. One is a 50 g piece of copper at 84°C. The other sample has a mass of 58 g and is originally at a

14. english

If you are writing a formal paper, how do you write 1600s (as in the century)? Is there an apostrophe: 1600's? Thank you for using the Jiskha Homework Help Forum. This is what the MLA guide says concerning dates: Full dates when written in the text may be

15. physics

A nuclear power plant has an electrical power output of 1900 MW and operates with an efficiency of 32%. If excess energy is carried away from the plant by a river with a flow rate of 1.0 106 kg/s, what is the rise in temperature of the flowing water? °C

16. chem

Will someone help me with this problem, please? Calculate the mass in grams of 1.20*10^24 molecules of CO2. Well, convert it to moles of CO2. number moles= 1.2*1024/avagnumber Now, you take the molecular mass of CO2 (12 + 2*16) and multiply that by the

17. art

what did the artist most likely do to create this piece of art? A. had no prior knowledge of perspective B. investigated the scenery before painting it C. chose the colors that were pleasing rather than accurate D. omitted the use of proportion to keep

18. physics

A 22.0-L tank of carbon dioxide gas (CO2) is at a pressure of 9.40 105 Pa and temperature of 22.0°C. (a) Calculate the temperature of the gas in Kelvin. K (b) Use the ideal gas law to calculate the number of moles of gas in the tank. mol (c) Use the

19. American history

Which of the following best describes the columbian exchange that occurred during the age of discovery

20. chemistry

49-kg woman cheats on her diet and eats a 582-Calorie (582 kcal) jelly doughnut for breakfast. (a) How many joules of energy are the equivalent of one jelly doughnut? J (b) How many stairs must the woman climb to perform an amount of mechanical work

21. thermal heat

Consider the following. (a) Find the work done by an ideal gas as it expands from point A to point B along the path shown in the figure. MJ (b) How much work is done by the gas if it compressed from B to A along the same path? MJ

22. physics

In a running event, a sprinter does 4.9 105 J of work and her internal energy decreases by 9.1 105 J. (a) Determine the heat transferred between her body and surroundings during this event. J (b) What does the sign of your answer to part (a) indicate?

23. physics

An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done on the gas as the

24. physics 52

A car rounds a banked curve where the radius of curvature of the road is R=100m., the banking angle 10 degrees and the coefficient of static friction is .10 (slippery conditions). A) Determine the range of speeds the car can gave without slipping up or

25. Math

A moving truck fills up a shipment at an old address, at (-2,1). It travels 7 blocks south and 6 blocks east to the new address. What is the location of new address?

26. Chemistry

How many moles of Cu are required to produce 16.25 g of H2O

27. ethics

Viktor Frankl states that it is ______ to define lifes meaning in broad and sweeping terms. a. Necessary. b. Easy. c. Impossible. d. Possible but very hard.

28. physics

An ideal gas is enclosed in a cylinder with a movable piston on top of it. The piston has a mass of 8,000 g and an area of 5.00 cm2 and is free to slide up and down, keeping the pressure of the gas constant. (a) How much work is done on the gas as the

29. algebra

perform the product in simplified form please show the work. (2x+1)(3x-2)

A MAN HAS 6 HOUSES. INEACH HOUSE HE KEEPS 6 CATS. EACH CAT HAS 6 WHISKERS. AND ON EACH WHISKER SIT 6 FLEAS. A. HOW MANY CATS ARE THERE? B. HOWMANY WHISKERS ARE THERE ON ALL THE CATS? C.HOW MANY FLEAS SIT ON ALL THE CATS' WHISKERS? D. ANSWER THE LAST LINE

31. criminal investigations

do the objectives of a criminal investigation change with the type of investigation

32. healthcare

Is quality related to culture? Why or why not?

33. Algebra I

Suppose you throw a ball up in the air from the top of a 160 foot building. It's height h in feet after t seconds is given by the function h= -8t^ + 48t + 160 a) When does the ball reach it's maximum height? b) What is the ball's maximum height? c) How

34. calculus

Implicit diff. y^2 + 4xy +4y^2=40 2yy'+ _______ + 8y*y=0 I am confused with the 4xy. Would you write this out to be 4x*y'+4y OR 4x*4y' + 4y*4x'? Please help

35. Algebra

During a hurricane evacuation from the east coast of Georgia, a family traveled west. For part of the trip, they averaged but as the congestion got bad, they had to slow to If the total time of travel was 7 hours, how many miles did they drive at the

36. electricity and electronics

a battery consists of five cells connected in series if the voltage developed by each cell is 1,5 the total voltage developed by the battery is 5 x 1.5 = 7.5 V Battery voltages add when connected in series.

37. Chemistry

How many moles of Cu are required to produce 16.25 g of H2O

38. Algebra

Suppose you throw a ball up in the air from the top of a 160 foot building. It's height h in feet after t seconds is given by the function h= -8t^ + 48t + 160 a) When does the ball reach it's maximum height? b) What is the ball's maximum height? c) How

39. medicall billing and coding

I need research to do a paper on POA INDICATORES. with penn foster

40. physics

Consider the following figure. (a) Determine the work done on a fluid that expands from i to f as indicated in the figure. J (b) How much work is done on the fluid if it is compressed from f to i along the same path? J

41. math

A sheet of cardboard measures 9 feet by 6 feet. Gina makes the entire sheet of cardboard into a closed box that is a perfect cube. What is the surface area of the box?

42. math

i am a number between 20 and 30. when you put me into 6 equal groups, there is an even number in each group and 1 is left over. what number am i?

43. math

If the recipe for 4 pancakes is 6tbsp flour and 1/4 pint milk how much milk and flour would you use for 1/4, 1/2, 2, 5, and 3 pancakes?

44. Nutrition

Josephine is a 20 year old female who is present for an eating disorder not otherwise specified. She currently teaches salsa lessons at the community college and is in her last semester of college. She reports she is living at home and the food her mom

45. statistics

What is the correct methodology for defining null and alternative hypothesis? Give an example

46. algebra

perform the indicated operation and give the answer in simplified form. 6x^2y^3(3xy^2)^2 _________________ xy^2

47. maths

Solve k^2 + km = 8 m = k- 6 Can you show me step-by step please?

48. Maths

Solve k^2 + km = 8 m = k- 6 Can you show me step-by step please?

49. Calculas

Can someone please walk me through the steps for the following Partial derivatives problems: f(x,y) = x^7 - 8y - 3, find x and y f(x,y) = 7 / 5x+4y, find x and y

50. Calculas

Can someone walk me through the following questions: Partial Derivatives f(x,y) = x^7 -8y -3 find x and y f(x,y) = 7 / 5x + 4y, find x and y

51. Mathematics

When 8 is added to 2 times a number the sum is 32.what is the number. Is it 16 or 4

52. math

How do you know 1 and 2/3 divided by 3 and 1/2 has to be less than 1/2, without calculating the quotient? Please explain :)

53. Chemistry

The temperature of 550. g of water is increased from 16.0 degrees Celsius to 28.2 degrees Celsius by burning fuel. How many joules of energy is needed to increase the temperature of the water to 28.2 degrees?

54. math

the length of the base of a triangle is 4 times its altitude. if the area of a triangles is 162cm2 find the altitude

55. statistics

what are a couple of benefits and limitations of manual calculations?

56. statistics

how can I start a introduction off for a statistical paper?

57. Literature

I am really having trouble with the convention in literature could I have some examples?

58. electricity and electronics

a transformer has a primany voltage of 115 v and secondary voltage of 24 v if the number of tures in the primany is 345 how many turns are in the secondary The voltage ratio Vsecondary/Vprimary = 24/115 = 0.209 This equals the turns ratio

59. Science

State and explain five causes of disability in children during the post natal period.

60. Math

I am charged 80 cents for a 15 minute phone call. How much is that call per minute?

61. MATH

my overall score including my final is a 72 did I pass

62. History

Descride 5 reasons for the outbreak of the Haitian revolution

63. Strayer

Choose two dimensions, describe them, and explain the relationship between your chosen dimensions. Provide at least two examples to support your explanation.

64. english

I need help paraphrasing this paragraph. Because addiction treatment aims to change deeply embedded habits, relapse can be part of the process. However, this is a well-known feature of diabetes, hypertension, asthma, and other chronic diseases with

65. Chemistry

How many moles of Al(OH) are required to completely react with 2.75mol of H2SO4?

66. math

If the recipe for 4 pancakes is 6tbsp flour and 1/4 pint milk how much milk and flour would you use for 1/4, 1/2, 2, 5, and 3 pancakes?

67. scientist

Scientists performed an experiment to determine whether there is a connection between learning ability and food. They took two groups of 20 mice each, all from the same purebred strain. The mice were deprived of food for 3 days and then given a standard

68. racial.ethnics

What does the future hold for Hispanic-Latino panethicity? I assume we will all continue to mix with each other, but will there be anything else?

69. scientist

How did leeuwenhoek's work influence us today?

The vast majority of inside directors are from all but one of the following

71. algebra

perform the operation and simplify the answer. sqrt 12x^3 . sqrt 3xy^2 Please show work.

72. college biology

What does enhance genetic diversity?

73. algebra

Dustin drives 5 miles per hour faster than Kelly. If he leaves town 1 hour after Kelly and they travel in opposite directions, they will have drive equal distances after Dustin has traveled 7 hours. How far apart are they?

74. science

is life processes a function that a living thing performs to stay alive and produce more of its own kind

75. Healthcare

What is being done to implement the reform of socialization and care givers?

76. english

choose the inflected form that is most likely to appear in a dictionary entry and why fastest craziest dogs taller

78. Algebra

create an englis representing an algebraic relationship An English what? Sentence?

1. Algebra I

and that can't be factored

posted on March 6, 2017
2. Algebra I

t^2 - 6t - 20 = 0

posted on March 6, 2017
3. Algebra I

If I divide the quadratic equation by a -8 wouldn't it be t^ - 6t - 20 = 0

posted on March 6, 2017
4. riddle

Time

posted on February 22, 2017
5. Math

How to figure out the ratio to 4.5-18 And 80.8-10.1 512-256

posted on December 15, 2016
6. algebra

Jill earns \$150 plus 15% commission how much is her income

posted on November 30, 2016

Hi!!! I'm doing an home work on the four types of sphere. when it rains what happen...🔑🗝🔐🔒🔒

posted on April 26, 2016
8. American History

All of the above

posted on February 2, 2016
9. payroll

Kipley Company is a small manufacturing firm located in Pittsburgh, Pennsylvania. The company has a workforce of both hourly and salaried employees. Each employee is paid for hours actually worked during each week, with the time worked being recorded in

posted on November 11, 2015
10. English

Either you must stop eating my food from the refrigerator or you must pay me for it. What sort of conjunction is used in the sentence? A. Coordinating B. Correlative C. Common D. Subordinating

posted on October 13, 2015
11. intro to computers

Your Boss is considering a BYOD program for your company. He asks you if there are any negatives to such a program. What do you tell him.

posted on February 18, 2015
12. Geography

the answer is A secondary just took test

posted on November 20, 2014
13. Le math

A. (17 • 6) + (20 • 10) B. (17 • 20) – (14 • 10) C. (17• 6) + (14 • 10) D. (17 • 20) – (7 • 14)

posted on September 16, 2014
14. Le math

ik

posted on September 16, 2014
15. math homework help

107826.25

posted on July 1, 2014
16. Child Development

Research shows that the____ is an important factor in a child's development

posted on February 20, 2014
17. Science

a

posted on November 4, 2013
18. Math

IN A TRIANGLE THE TWO LARGER ANGLES DIFFER BY 10 DEGREE. tHE SMALLER ANGLE 50 DEGREE LESS THAN THE LARGEST ANGLE. WHAT IS THE MEASURE

posted on April 12, 2013
19. Research skills

A. 530 C68s 1985 B. 530.1 A12f 1976 C. 530.028 M52c D. 530 A82u 1988 E. 530.0274 C52e

posted on January 13, 2013
20. statistics

man cholesterol is 175mg/dl , standard deviation 20mg/dl..approximate normal distribution..what percentage has cholesterol above 155mg/dl? thanks..

posted on July 7, 2012
21. criminal investigations

that is exactly what i thought too, the main objective is to solve the crime that is being investigated. thank you Ms. Sue

posted on December 7, 2011
22. healthcare

thanks

posted on June 26, 2010