Popular questions and responses by NADIA
1. ## Physics

17. A 60.-kilogram student climbs a ladder a vertical distance of 4.0 meters in 8.0 seconds. Approximately how much total work is done against gravity by the student during the climb?

2. ## chemistry

A helium balloon is filled to a volume of 5.60 L at 25∘C. What will the volume of the balloon become if it is put into liquid nitrogen to lower the temperature of the helium to 77 K? A helium balloon is filled to a volume of 5.60 at 25. What will the

3. ## Biology

Most enzymes in the human body work best at 37 degrees C (98.6 F.) What do you think this means then when your sick?

4. ## English

can someone overlook my answers to help with the questions that are wrong at let me know which ones are right. Bold = my answers I chose (right) Wind can create alterations in the surface layers of rock. Wind Is one cause of erosion. Which of these

5. ## Chemistry

Calculate the solubility of ZnCO3 in .050 M Zn(NO3)2. Ksp= 3.0*10^-8 solubility= 1.7*10^-4

6. ## Pre-Calc

A piece of wire 100 cm long is cut into two pieces. One piece is bent to form a square and the other to form a circle. Let x equal the length of the wire used to form the square. A. write the function that represents the area of the two figures B.

7. ## math

1. Shawn Fitzgerald finds a suitable property and agrees upon a selling price of \$137,900. The mortgage company requires a 20% down payment and Shawn chooses to finance the property for 30 years at 8%. What is the total amount of interest charged, rounded

8. ## Math

The ratio of Jims money to Peter's money was 4:7 at first. After Jim spent 1/2 of his money and peter spent \$60, Peter had twice as much money as Jim. How much money did Jim have at first?

9. ## math

A cylindrical gasoline can is 18 inches across and 20 inches tall.which expression represents the approximate volume in cubic inches? (1)(3.14)(9)2(20) 2) (3.14)(9)(202)2 3) (3.14)(18)(20) 4) (3.14(18)2(20) 5) (3.14(36)2(20)

10. ## Physics

An ice skater skates 16.9 m southwest, then 33.8 m east, and finally 50.7 m in a direction 50.9◦ north of east. Find the magnitude of the displacement re- quired to bring the skater back to her starting point. Answer in units of m

11. ## Chemistry

To prepare one liter of 2.5 M solution of HCl, what is the volume of concentrated HCl (37% p/p, d = 1.19 g/mL) to be used?

12. ## math

a large elm tree died after it was struck by lightning.the property owner thinks he can remove it himself,but is concerned that it will fall on his greenhouse.he takes several measurement before attempting to cut it down.at 3 p.m. he measures the shadow of

13. ## chemistry

What is the concentration of a HNO3 solution if 10.0 mL of the solution is neutralized by 3.6 mL of a 0.20 M NaOH solution?

14. ## Statistics

Marks: --/20 What percentage of the general US population have bachelor's degrees? The Statistical Abstract of the United States (120th edition), gives the percentage of bachelor's degrees by state. For convenience, the data are sorted in increasing order.

15. ## Spanish 3 Homework.

Hello. For these questions I have to specify whether these sentences are in the correct Spanish form. 1. “Tú das la tarea a tu maestro.” con pronombres es “Tú le la das.” True or false **FALSE 2. “El hombre manda un mensaje a su esposa.” con

16. ## math

james sold 450 tickets for the community play. Tickets for children cost \$2, and tickets for adults cost \$5. James sold \$1,800 worth of tickets. How many tickets for adults did James sell?

17. ## Chemistry

In the Formula... Na+ + NO2- + HSO3NH2 -> HSO4- + H2O + N2 + Na+ which I know has a 1:1 ratio, How do I figure out the Moles of N2 gas expected. Molar volume = 24.627 L/mol Moles of N2 produced = .0067 mol Volume of N2 gas of STP = .165 L Original used

18. ## Chemistry

Technetium-99m is an ideal radioisotope for scanning organs because it has a half-life of 6.0 hr and is a pure gamma emitter. Suppose that 200mg were prepared in the technetium generator this morning. How many milligrams would remain after the following

19. ## History

The question is based on "Democracy in America" by Alexis de Tocqueville: "Although private interest directs the greater part of human actions in the United States as well as elsewhere, it does not regulate them all. I must say that I have often seen

20. ## Spanish 3

1. ¿Cuál frase usa el pronombre posesivo correctamente? Mi padre está enfermo. A. Él está enfermo. B. El mío está enfermo. **** C. Suyo padre está enfermo. D. Éste está enfermo. 2. Cuál frase usa el pronombre posesivo correctamente? Tu hermana

21. ## Math

there are 19 more cows than sheep. there are 19 more ducks than hen there are more hens than cow

22. ## Math

How do I writ a equation that involves multiplication,contains a variable and has a solution of 5. Can you please help me

23. ## social studies

which of the following statements is supported by the information in the map? ONE) australia is self-supporting in oil two)Africa trades oil only with south America.three)the soviet Union has trade routes with every major continent. four) all of the major

24. ## Spanish III Homework

Termina la oración: Cada año, cuando yo era joven, nosotros______. A. fuimos a los parques. B. íbamos a los parques C. vamos a los parques D. iremos a los parques Is it B? Thanks for your help!

25. ## Spanish 3 Homework.

El pronombre que se usa en lugar de "Aquel gato es bonito" es: aquél es bonito. True or false? ***true El pronombre que se usa en lugar de "Ese cantante es muy popular" es: Ése cantante es muy popular. True or false? ***true Am I correct? Thanks!!

26. ## Math Question

Tom Newman took out a simple interest loan of \$1,500.00 at 10 percent interest for 12 months. after 4 payments the balance is 1,100. he pays off the loan when the next payment is due what is the interest? Is it \$9.17 Thanks!!

27. ## Chemistry

Technetium-99m is an ideal radioisotope for scanning organs because it has a half-life of 6.0 hr and is a pure gamma emitter. Suppose that 200mg were prepared in the technetium generator this morning. How many milligrams would remain after the following

28. ## math

Tim Newman took out a simple interest loan of \$1500 at a 10 percent interest for 12 months. After 4 payments, the balance is \$1100. He pays off the loan when the next payment is due. What is the interest? Is it \$9.17? Thanks!

29. ## math

a man decides to create a vegetable garden. He buys 100m of wire netting to fence off a rectangular area from the kangaroos. There is already an existing fence on one side of the rectangle, so the 100m of wire netting is for the other 3 sides.If x is the

30. ## Math

answer to travis has designed a rectangle with an area of 59 square units. his rectangle is the smallest rectangle with whole number side lengths. what are the length and width of the rectangle, explain your reasoning. what is the perimeter of the

31. ## Pre Calculus

At a glassware factory, molten cobalt glass is poured into molds to make paperweights. Each mold is a rectanglar prism whose height is 3 inches greater than the length of each side of the square base. A machine pours 20 cubic inches of liquid glass into

32. ## Chemistry

Technetium-99m is an ideal radioisotope for scanning organs because it has a half-life of 6.0 hr and is a pure gamma emitter. Suppose that 200mg were prepared in the technetium generator this morning. How many milligrams would remain after the following

33. ## History

1. Why do some argue that the Supreme Court "legislates from the bench" or, in other words, actually makes law? A. The Supreme Court does not legislate, i.e. make law. B. The Supreme Court is involved in administrative law. C. The Supreme Court's rulings

34. ## math

a designer creates a drawing of a triangular sign on centimeter grid paper for a new business. the drawing has sides measuring 6 cm, 8 cm, and 10 cm, and angles measuring 37°, 53°, and 90°. to create the actual sign shown, the drawing must be dilated

35. ## Ecology science

Jawless fishes and salamanders are alike are alike in that both types of of animals? Is it A ,B,C, or D

36. ## Ecology science

Jailers fishes and salamanders are alike in that both types of animal?

37. ## SPANISH 3

I was given this assignment: "Escribe en español un párrafo breve de por lo menos cuatro oraciones. Habla de la foto aquí usando los adjetivos demostrativos como pronombres." (The picture is of a woman on a computer with a man standing over her). Are

38. ## Math questions

1. Shawn Fitzgerald finds a suitable property and agrees upon a selling price of \$137,900. The mortgage company requires a 20% down payment and Shawn chooses to finance the property for 30 years at 8%. What is the total amount of interest charged, rounded

39. ## physics

An electron passes location h0.02m, 0.04m,−0.06mi, and 4 μs later is de- tected at location h0.02 m, 1.84 m,−0.86 mi. Find the average velocity of the elecron: ¯v = If the electron continues to travel at this av- erage velocity, find where it will be

40. ## physics

A baseball has a mass of about 155 g. What is the magnitude of the momentum of a baseball thrown at a speed of 95 mph?(Note that you need to convert mass to kilograms and miles per hour to meters per second.) Answer in units of kg · m/s

write and that is equivalent to each of the following expression,using the related acute angle a) sin 13pi/6 b) cos 11pi/8 c) tan 7pi/4

42. ## math

Joey has a beach ball with a radius of 20 cm. What volume of air will it hold when fully inflated?

43. ## math

can you write 4+4+3=11 in a multiplication sentence?

44. ## math

find the mean,variance and standard deviation for the number of heads when 10 coins are tossed.

45. ## Chemistry

The antacid Amphogel contains aluminum hydroxide Al(OH)3. How many milliliters of 6.00M HCl are required to react with 150mL of 1.12M Al(OH)3? Al(OH)3(s) + 3HCl(aq) → AlCl3(aq) + 3H2O(aq) Help please and thanks in advance

write and that is equivalent to each of the following expression,using the related acute angle a) sin 13pi/6 b) cos 11pi/8 c) tan 7pi/4

47. ## physics

A(n) 800 kg drag race car accelerates from rest to 103 km/h in 1.05 s. What average net force is exerted on the car?

48. ## Life orientation

Two institution/community that are involved in supporting or giving redress to teenage pregnancy

49. ## geometry

G lies on the perpendicular bisector of segment AB, AG = x2 + 4x, and BG = x + 18. Find AG

50. ## Government

1. Suppose that the Articles of Confederation are still in force and that a resolution has been proposed that would abolish the executive committee and replace it with a president. Now suppose that, out of the thirteen states, only Pennsylvania did not

51. ## Math

A fruit stand had 36 oranges, 28 lemons, and 16 grapefruits. What was the ratio of oranges to the total pieces of fruit? A. 9 : 20 B. 1 : 2 C. 9 : 11 D. 9 : 7

52. ## question on microscope

"In order, list the lenses in the light path between a specimen viewed with the compound light microscope and its image on the retina of the eye." My son got this question and I cannot make sense of it. Growing up, we didn't have microscopes to use in

53. ## economics

cattle rancher (A) owns a property next to an apple farm (B) cattle sometimes tent to roam into B's land and damage the trees. The rancher can choose the size of the herd. revenue form cattle is \$6 per head. The following schedle lists A's marginal

Tim Newman took out a simple interest loan of \$1500 at a 10 percent interest for 12 months. After 4 payments, the balance is \$1100. He pays off the loan when the next payment is due. What is the interest? Is it \$9.17

55. ## Science

An arrow is shot vertically upwards with an initial velocity of 14 m/s . Calculate the height reached

56. ## algebra

what if a boat used 21 gallons of gas to go 64miles, how many miles can the boat travel on 84 gallon of gas

57. ## math

one angle of a triangle is 90 degrees.if the ratio of the legs is 1:1,what are the measures [in degrees] of the two remaining angles? [1] 30 and 30 [ 2] 30 and 60 [ 3] 45 and 45 [ 4] 60 and 60 [5] 45 and 30

(-w)(-10w^3)

59. ## physic

an alpha particle of mass m= 6.6 x 10^-27 kg has a speed of .81c, where the speed of light is c= 3 x 10^8 m/s. The alpha particle collides with a gold nucleus and rebounds with the same speed in the opposite direction. If the collision lasted for t= 4 x

At what time is eh sum of the digits on a digital clocck the greatest? The answer is 12:59 right?

61. ## physics

The instant before a squishy ball of mass meets a horizontal floor and comes to rest in time ?t it has momentum p = p0 (ˆi −ˆj ) .What average force does the floor exert on the ball in order to stop it during this time interval?

62. ## statistics

Someone who has never seen a normal die before decides to estimate the mean value of all its faces (μ) by rolling it many times. First, they are told that the standard deviation is σ = 1.7. Then, they roll the die 50 times and get a sample mean of x-bar

63. ## Math

All planets revolve around the sun in elliptical orbits. Uranus's furthest distance from the sun is approximately 3.005 times 10 to the ninth power km, and it's closest distance is approximately 2.749 times 10 to the ninth power km. Using this information,

64. ## Chemistry

Sodium sulfate is slowly added to a solution containing 0.0500 M Ca2 (aq) and 0.0370 M Ag (aq). What will be the concentration of Ca2 (aq) when Ag2SO4(s) begins to precipitate?

66. ## calculus

If the nth partial sum of an is sn=(3n-2)/(n+1) what is an when x>1? and what is the sum of an?

67. ## Physics

an alpha particle of mass m= 6.6 x 10^-27 kg has a speed of .81c, where the speed of light is c= 3 x 10^8 m/s. The alpha particle collides with a gold nucleus and rebounds with the same speed in the opposite direction. If the collision lasted for t= 4 x

68. ## physics

an electron of mass m has a speed of v. at what speed would the ration of the magnitudes of the relativistic and non relativistic momenta be equal to 2?

69. ## Chemistry

What is the concentration of CrO22 4 in 0.0040 M Ba(NO3)2 saturated with BaCrO4. Including the activity coefficients in the expression? The ksp of BaCrO4 is 1.17 x10^-10 [CrO4 2-]= ? M I want to understand the problem not just the answer please.

70. ## French

Guillaume voyage avec ______ soeur et _______ parents. i have to use " SON , SA, OR SES " as appropriate.

71. ## MATH

IF THERE ARE 24 GIRLS IN THE CLASS HOW MANY BOYS ARE THERE IN THE CLASS Y=3/8X

72. ## Chemistry

The normal hormone adrenaline concentration (C9H13NO3) in blood plasma and 6,0x10^-8g / L. How adrenaline molecules are contained in 0.5L of plasma sanguine?

73. ## physics help

A uniform plank of length 5.1 m and weight 235 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 458 N walk on the overhanging part of the plank before

74. ## Science

What is the raw materials of metamorphic rocks?

75. ## math( pls help me out)

A sample of four families with three children each was taken.find the probability that one family has two girls,two families have three girls and one family has three boys.

76. ## Math

venus and fumiko are coworkers at a rental store Venus earns 2.25 per hour than Fumiko together they earn 14.55 per hour how much money per hour does Venus earn

77. ## History

1. The right of "Pursuit of Happiness" would be most likely be identified by today's citizens as the right to: A. educational opportunities B. individual security C. ability to decide what I want to be D. government that is by the people and for the people

78. ## help

What is the percentage of words in an english dictionary that have latin or greek as their source? A} 50% B} 60% C} 70% D} 80% .i choose a.

79. ## math

A sample of four families with three children each was taken.find the probability that one family has two girls,two families have three girls and one family has three boys.

80. ## Physics

At time 9 s, a car with mass 1400 kg is lo- cated at and has momentum . The car’s momentum is not changing. At time 18 s, find the position of the car: ~d =

81. ## Physics

An electron passes location , and 4 μs later is de- tected at location . Find the average velocity of the elecron: ¯v = If the electron continues to travel at this av- erage velocity, find where it will be in another 9 μs : ~d = Answer in units of m

82. ## college algebra

please solve by method of substitution 0.3x-0.4y-0.33=0 0.1x + 0.2y -.21=0 please give all steps to solve.I think I understand the basic concept but this is little more complicated for me. Thanks in advance

83. ## human resources

Needs assessment: What types of issues might indicate a need for training? From what sources would these issues be identified? If you were a training manager, how would you prioritize training needs from these sources? a. A supervisor requests training on

85. ## Science

Imagine you are a laboratory technician studying how a medicine reacts with cancer cells. Describe how learning and developing new skills to analyze a specimen can help make the world a better place. I really need to know this by 9:30 tonight and I'm

86. ## algebra

grandpa has 9 grandchildren. the following ages are 1 15 9 12 18 9 5 14 7. which statement does the data support

87. ## math

The wheel on a child's bicycle is 48 cm in diameter. To test the strength of the tire, William lifts the back wheel 1 m from the ground and spins it at 36 turns/min. He attached a blue sticker to the bottom of the tire beforehand. Assuming that William

88. ## Human resources

Analyze how emotional and physical aspects of a person’s life can influence the employee’s effectiveness in the work environment.

89. ## explantaation

how do birds fly? do u know where to find diagrams of how birds fly? http://www.fi.edu/wright/again/wings.avkids.com/wings.avkids.com/Book/Animals/intermediate/birds-01.html

90. ## tight junctions

prevent the contents of the intestine from mixing with bodily fluid on the other side of the epithelium? The statement you made could be true...I'm not exactly sure what you were trying to ask, though... sorry, was asking if tight junctions prevent the

91. ## Math Venn Diagram

I need help with these questions: A survey of 115 children found that 39 liked The Little Mermaid 43 liked 101 Dalmatians 56 liked Mickey Mouse 7 liked The Little Mermaid and 101 Dalmatians 10 liked The Little Mermaid and Mickey Mouse 16 liked 101

92. ## chemistry

please could you identify at least 2 limitations each for the coordinate bonding and metallic bonding theories?

94. ## Algebra 2

how do you graph the function? f(x)=2(x+2)^2(x+4)^2

I got this question marked wrong on a paper. Unfortunately, my prof didn't explain. _________________ subtances can pass through the plasma membrane. I put "nonpolar". What is wrong with this and does anyone know the correct solution/answer? Thanks all.

96. ## Math

If the scale factor is 1/4 square inches = 5 ft. And the cost to build the house was \$46,950, what would the cost be with the scale factor?

97. ## Math

How to find the average of decimals

98. ## Science

Is isometric the crystal type in magnetite? How else can I say that because I don't trust Wikipedia and I can't find anything much there

99. ## Science

What type of crystals does magnetite have? What fracture does magnetite have?