# Isabel

Popular questions and responses by Isabel
1. ## Physics

Block 1 of mass m1 slides from rest along a frictionless ramp from height h and then collides with stationary block 2, which has mass m2 = 3m1. After the collision, block 2 slides into a region where the coefficient of kinetic friction is μk and comes to

2. ## college chemistry

if 2.00g of Zn is allowed to react with 2.00g of CuSO4 according to the equation CuSO4(aq) + Zn(s)-----> ZnSO4 (aq)+ Cu(s) how many grams of Zn will remain after the reaction is complete ?

3. ## physics

An "energy bar" contains 22g of carbohydrates. If the energy bar was his only fuel, how far could a 68 kg person walk at 5 km/hr ?

4. ## Physics

Mercury is poured into the open end of a J-shaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m

5. ## chemistry

DETERMINE the enthalpy for the reaction CH4(g)+NH3(g)->HCN(g)+3H2(g)

6. ## College Physics

A 57.0 cheerleader uses an oil-filled hydraulic lift to hold four 110 football players at a height of 1.40 . If her piston is 19.0 in diameter, what is the diameter of the football players' piston? The density of the oil in the hydraulic system is 900

7. ## Help this is so confusing?

*=times ^=square root /=divided 3.1416*3/6+123-56*^16*11-23/178=??? HELP ME!

8. ## chemistry

The volume of a mass of gas is 300 ml at 25 Celsius and 685 torr. What will the gas occupy at STP?

9. ## Math

Submarine is traveling parallel to the surface of the water 492 feet below the surface. The submarine begins a constant I sent to the surface so that it will emerge on the surface after traveling 3974 feet from the point of its initial ascent? What

10. ## math

Three cards are chosen at random from a standard 52-card deck. What is the probability that they are not all the same color?

11. ## analogy

what is the analogy flower:rose::tree? begining with the letters scr,spr,str,thr

12. ## science

The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to

13. ## science

The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to

14. ## Geometry (immediate help and explanation)

A bridge is the shape of an arc of a circle. The bridge is 8 feet tall and 36 feet wide. What is the radius of the circle that contains the bridge? Round your answer to the nearest tenth.

15. ## Physics

Mercury is poured into the open end of a J-shaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m

16. ## Math

Mr. Brown needs to buy some fencing for his garden (too many rabbits have been getting in and eating the vegetables). If his garden is twenty-three meters by thirty-four meters and is in the shape of a rectangle, what length of fence does he need to build?

17. ## Physics

Mercury is poured into the open end of a J-shaped glass tube, which is closed at the short end, trapping air in that end. How much mercury can be poured in before the mercury overflows? Assume air to act like an ideal gas. The long and short arms are 1 m

18. ## Math

the perimeter of a rectangle is 108 cm. if the length of the rectangle is 5 tikes the width what are the demensions of the rectangle

19. ## Math

You are on your way to work.you drive 2.4. Miles to a gas station and buy gas.your workplace is 4.99 miles from the gas station.what is the distance of your commute to work

20. ## probability

A team averages 7 losses for every 13 games it wins. If ties are not permitted, what is the probability that the team will win its next game? Express your answer as a percent.

21. ## Chemistry

I was wondering if somebody could help me with this... Classify the following substances as covalent molecules or ionic compounds: a. MgO e. LiCl b. NI3 f. SF4 c. CuS g. XeF4 d. NO2 h. CsF How do you know if they are covalent or ionic bonds? Metal +

22. ## Physics

1. A dog sits under the only shade tree in its territory. Suddenly the dog desires to dig a previously buried bone. From the tree the dog goes 13 meters at 22.6° north of east. Not finding the bone there the dog then goes 17 meters at 61.9° north of

23. ## math

Match the account balance with the debt that it represents. account balance = −\$22 account balance > −\$22 account balance < −\$22

24. ## Grammar

What is the irregular plural noun? The teams of oxen pulled the plows across the field. (I CANT FIND THE ANSWER DEPENDING ON THE DEFINITIONS ON THE PAPER AND ONLINE)

25. ## Math

A fish bowl is constructed out of a spherical bowl with diameter 20cm. The bowl was initially empty and water flows into the bowl at a rate of 10cm^3/s. Let V and h be the volume and depth of water in the bowl at time t seconds respectively. Find dh/dt

26. ## Math

A cylinder is inscribed in a cone as shown in the diagram below. The cone has a height of 8cm and a fixed radius of R cm. The cylinder has a radius of x cm and a height of h cm. Show that the volume of the cylinder is maximised when x=kR, where k is a

27. ## science

The two systems shown below are identical except for the rod connecting the two beakers. Initially the temperatures of the beakers are as follows: Beaker A = 88°C Beaker B = 42°C Beaker C = 88°C Beaker D = 42°C Four minutes later the temperatures are

28. ## math

you are building a ramp that will be in the same shape of a perfect right angled triangle. the vertical height of the ramp will be 10 feet. the horizontal base of the ramp will be 15 feet. what will be the length of the downward sloping side of the ramp? A

29. ## Physics (pressure)

A barometer has air trapped above the mercury in an inverted tube with the opening in a reservoir of mercury. When the length l of air trapped is 10.0cm, the mercury height h is 72.0. When the tube is slightly lowered into the reservoir, l becomes 8.0cm.

30. ## science

Two insulated beakers contain different amounts of identical liquids. Beaker A contains twice as much liquid as Beaker B. The temperature of Beaker A is 80°C. The temperature of Beaker B is 40°C. An aluminum rod connects the beakers, and the system is

31. ## science

The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 85°C. The temperature of Beaker B is 40°C. A metal rod connects the beakers. Five minutes later, the temperature of Beaker A is 75°C and the temperature

32. ## math

How do I find the expanded form of a number?

33. ## History

Why didn’t America get involved immediately in World War 1 ?

34. ## AICE math

A 30 foot ladder is leaning against a house(see figure). if the base of the ladder is pulled away from the house at a rate of 2 feet per second, the top will move down the wall at a a rate of r= 2x/(sqrt(900-x^2) ft/sec, where s ist the distance between

35. ## physics

In a room that is 2.78 m high, a spring (unstrained length = 0.30 m) hangs from the ceiling. A board whose length is 1.94 m is attached to the free end of the spring. The board hangs straight down, so that its 1.94-m length is perpendicular to the floor.

I left my math book at school, grabbed my geo. :( We were supposed to take notes in a math textbook about Variables and Algebraic expressions. Can I have a good website with definitions and examples? Thanks. (and next time i'll remember my textbook)

37. ## math

you deposit \$ 900 in a savings account that earns 4%interest coumpounded once a year and has no service charges. you donot make any deposits or withdrawals to the account for two years. at the end of two years, after the second year's interest has been

38. ## science

The two insulated beakers contain equal amounts of identical liquids. The temperature of Beaker A is 80°C. The temperature of Beaker B is 50°C. A copper rod connects the beakers. The system is then left alone for several hours. What would you expect to

39. ## math

the ratio of boys to total of students is 2:5.the number of girls of the student is 3. there are 123 girls.how many boys are there?

How do you find themes in a story? EX. Don't watch too much TV or you will become dumb.

41. ## Social Studies

What continent is Brazil on?

42. ## Math (immediate help, please)

A bicycle has 26-inch diameter wheels. If the wheels revolved 2 times after the brakes were applied, the stopping distance is approximately _____. What's the answer? Provide a thorough explanation as well, please.

43. ## algebra 1

what is the y-intercept of the graph of 4x+2y=12? i was giong well on my scratch paper and i mest up and i got stuck and had to erase everything and do it over answers: a -4 b -2 c 6 d 12 please and thank you i need how they do the work i cant decide!

44. ## Math (immediate help, please!)

A bicycle has 26-inch diameter wheels. If the wheels revolved 2 times after the brakes were applied, the stopping distance is approximately _____. What's the answer? Provide a thorough explanation as well, please.

45. ## math

what is the sixth term in this sequence 83,77,71,65

46. ## math

graph y=x2,y=2x2 and y=1/2x2 on the same

47. ## Algebra

How can you factor? x^6+y^6 That expression cannot be factored further because the bases of the exponents are different. so it's prime...Thank you. Can you please help me with this one? 50x^2 - 2y^2 - 4yz - 2z^2 I tried doing it but I get very confused.

48. ## English

Hi, I was wondering if somebody could help me with this... I'm supposed to determine whether these examples are logical fallacies or not. and if they're logical fallacies and I have to determine what type. 1. If no one answers the phone, obviously there is

49. ## World History

Hi, I've been assigned a project where I'm playing the role of a history revionist that has to make a top ten list of the problems with bureaucracy in Qing Dynasty China. Also, this has to appeal to senior citizens somehow (that's my assigned audience).

50. ## English

What actions could the friar and nurse (from Romeo and Juliet) have taken in act 4 that would have changed the outcome?

51. ## English

Hi, I was wondering if somebody could help me understand this writing prompt. I'm not sure If I'm supposed to talk about the characters' different points of view in some goals toward achieving sucess or if I'm supposed to tell what each characters' goals

52. ## Physics

Hi I was wondering if somebody could help me with this question? According to the Bohr model, what determines the color of light emitted when an electron moves from one energy level to another? The color (wavelength) is determined by the change in energy

53. ## US History

Hello! I was wondering if somebody could help with this question... - During the early eighteenth century the colonial assemblies had gained what two important powers, what were they? According to Encarta Encyclopedia, "In reality, the governors had to

54. ## Englsih

What action verb would you use to replace "got" in the following sentence? On his way home, he got run over. I am out of clues as to what action verb to use in this sentence. Please help me!

What is a cogent essay? Is a cogent essay an argumentative essay?

56. ## Statistics

1200 high school freshman were randomly selected for a national survey. Among survey participants, the mean grade-point average was 2.8, and standard deviation was 0.6. What is the margin of error, assuming a 95% confidence level?

57. ## chemistry

what would happen if PbI2 were to be ingested into your blood stream?

58. ## science

what drives the lithospheric plates

59. ## HCA 220

Yes Ms. Sue it has to be imaginary patient.

60. ## HCA 220

o Scenario 2: You are an allied health professional working with an orthopedist. You have been working with the patient and need to update the doctor on the reason for the patient’s visit. Begin describing the patient’s concerns. Your classmates may

Keeping the numbers in exact order, add perentheses, exponents, multiplication, subtraction, divison and addition to make this expression equal 100. 3,5,6,2,54, and 5. Thank you!

Question:Percy is coloring a flag he made for class. He can use the colors blue, green, yellow and red.He can paint the rectangle part (backround) of the flag one color, the triangle one color, and the star one color. For example, Percy could make the star

At Mrs. Livingston's favorite grocery store, oranges are sold in bags of 10 and grapefruits are sold in bags of 6. Mrs. Livingston wants to buy an equal number of oranges and grapefruits. What is the smallest number of each fruit Mrs. Livingston needs to

64. ## algebra 2

find a1 for given geometric series. Sn= 405, r=3, n=4 I don't know how to start the problem

65. ## olgc

a circle is divided into 18 equal parts. how many degrees is the angle for each part? how many degrees is the angle for the 5 parts?

66. ## homophones

is the word days a homophone?

67. ## books

I am having trouble finding the birth date of Lady Montague from Romeo and Juliet. If you can please help me i would really appreciate it!!!!!!!!!!!!!!! Thanks sooooooooooo much, Isabel

68. ## Math

If i'm given the equation 4.23= -.19t^2+2.56t-2.37 how do i find the value of t?

69. ## personal finance

would you purchase a \$100,000 20 year annuity today for \$15,000 given a required rate of return of 14.5%? Why, what is the value of the annuity?

70. ## Math

What was the average number of laps completed by each team member running? The total laps were 6,000.

71. ## math

your credit card balance is \$1150 and the minimum monthly payment required is 3%. what is the minimum amount you must pay this month? A \$25.50 B \$31.00 C \$34.50 D \$39.00

72. ## Math

What is 9,010-8,736?

73. ## US History

I can't find the answer to this question. Please someone help What was the purpose of Andrew Jackson's report to the Secretary of War on January 19, 1814? Frm The Wopld Book Encyclopedia, 1977 edition, He refused to demobilise his forces, per the Secratary

74. ## Algebra

How can you factor? 1. x^4 - 4x^2 + 3 2. x^3 - 2x^2 - 4x + 8 Thanks 1. set a = x^2 this should simplify your problem once you've factored the expression, substitute x^2 back in for a 2. For our purposes I don't think this expression can be factored.

75. ## Algebra

Peter buys 84 yards of fence to make a play area for his puppy. He wants the area to be 28 yards long. What is the area of the play area if he uses the entire fence he bought?

76. ## Math (immediate help, please)

Find the area of a regular pentagon with a side 8 centimeters. Please provide an explanation!

77. ## Math

Farmer Bob is considering buying a new field that is next to one he already owns. The field he is considering is a perfect square. The fence along each side of this square field is made of old logs and is a third of a mile lone. If he can walk at a rate of

78. ## Math

Find lim θ→0+ A(θ)/B(θ)

79. ## ENGLISH

IM DOING AN ACROSTIC POEM ON THE WORD SPRING AND I NEED HELP FOR I CAN I GET ANY IDEAS ASAP DO TOMORROW 4/13/2011 THANK :]

80. ## HCA 220

You are attending a wellness conference and one of the exhibitors is a chiropractor in your local area. You are unfamiliar with chiropractic care and want to learn more. Since you are at the conference, the doctor assumes that you have knowledge of medical

81. ## Math

Write a formula to find the area (A) of a square. Use S to represent the length of one side.

82. ## matha

which of the following is an example of a binomial? A 2y B 2x+y C 2xy D none of the above

83. ## English

This is a copy of my Essay, any help? Ishmael Beah’s memoir A Long Way Gone tells the tragic story being a child soldier and the horrifying truth about the collateral damage of the civil war in Sierra Leone. The book chronicles the day to day events of

I have data on ATPase activity of two types of muscle at different concentrations of Ca 2+ and although the leg muscle seems to be more responsive than the flight i have to prove this statistically I don't know whether my data is paired or not. I think

85. ## Science / math

I have data on ATPase activity of two types of muscle at different concentrations of Ca 2+ and although the leg muscle seems to be more responsive than the flight i have to prove this statistically I don't know whether my data is paired or not. I think

I don't know where to start with it? A tube is set up for radioimmunoassay containing antibody with a capacity for binding 1ug antigen. Both labelled (50,000 counts per ug) and unlabelled antigen are added to the tube. Work out a formula to calculate the

87. ## pre algebra

evaluate (m+n)-3 power if m=-1 and n=-5

88. ## Math

Can somebody give me a good explanation on how to find the Greatest Common Factor on a 6th-7th garde level? Thanks. I was absent yesterday and I have a quiz on this TOMORROW!

can someone help me with RATIONAL NUMBER REPRESENTATION: APPROPRIATE FORMS!?!?!@_@IM FREAKIN OUT HERE PEOPLEZZ!!!

90. ## United States History

Hi I was wondering could help me with this question... :-) Why did it seem improbable that the thirteen colonies would come together and unite in a common bond? What past events made this seem like an unrealistic expectation? Off the top of my head, I can

91. ## math

unpaid balance at the end of the 10th year? loan amount of 250,000

92. ## English

What actions could the friar and nurse (from Romeo and Juliet) have taken in act 4 that would have changed the outcome?

93. ## Math

What was the average number of laps completed by each team member running? The total laps were 6,000.

94. ## literary

what is the relation beween shakespeare and john donne?

95. ## math

How do I simplify a number like 3 and sixteen twelves?

96. ## Math

How do you find a common denominator?

97. ## math

explain how you know tt 3/6 i greater than 1/3 but less than 2/3

98. ## math

how can i drop an egg 4 feet without breaking it

99. ## pre algebra

100- 3(2.3) + 5.6