# Niki

Popular questions and responses by Niki
1. ## physics

A metal sphere of radius r is dropped into a tank of water. As it sinks at speed v, it experiences a drag force F given by F = kr v, where k is a constant. What are the SI base units of k?

2. ## math

A bottle of water costs \$1.50. Explain how you would make a graph of four ordered pairs to model the total cost of the water in terms of the number of bottles.

3. ## Chemistry

What is the balanced ionic equation between bromine and sodium bisulfite??? thanks

4. ## Math

Lee Lu is paid \$12.50 per hour, with overtime pay of time-and-a-half for Saturday work and double time for Sunday. Calculate her gross pay if she worked 35 hours during the week, 5 hours Saturday and 3 hours Sunday.

5. ## physics

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If,

6. ## MATH

THE TIME OF A PENDULUM VARIES AS THE SQUARE ROOT OF IT LENGHT IF THE LENGTH OF A PENDULUM WHICH BEAT 15S IN 9CM FIND A THE LENGHT THAT 80SECONDS B THE TIME OF A PENDULUM WITH LENGHT 36CM

7. ## Statistics

A basket ball player makes 70% of her free throws. She takes 7 free throws in a game, and makes 5 of her 7 throws. If the shots are independent of each other, Then what is the probability that she makes the first five and misses the last 2?

8. ## Physics

An outfielder throws a baseball to home plate with a velocity of +15 m/s and an angle of 30°. When will the ball reach its highest altitude? (Points : 3) 1.2 s 1.5 s 0.77 s 0.50 s

9. ## Math

Gina's base pay rate is \$12.25 per hour, with overtime pay of time-and-a-half, and double-time for holidays. Calculate her gross pay if she worked 4.5 holiday hours in addition to 39 hours Monday through Saturday Is this the proper way to set it up: (12.25

10. ## chemistry

As pure elements. all of the halogens are diatomic molecular species. their melting points are: F2, 85 K, Cl2 239 K, Br2 332 K, and I2 457 K. using periodic table, how can i predict the molecular formula of elemental astatine. at the only radioactive

11. ## chemistry

The solubility of compound A in ethanol is 0.8 g per 100 mL at 0°C and 5.0 g per 100 mL at 78°C. What is the minimum amount of ethanol needed to re-crystallize a 12.0 g sample of compound A? How much would be lost in the re-crystallization, that is,

12. ## English

My friend Jorge can play the guitar and sing. play is underlined would this be: part of a compound subject part of a compound verb phrase- part of a simple predicate I think its b.

13. ## Chemistry

How would the titration curve of hydrochloric acid solution differ if barium hydroxide was used to titrate instead of sodium hydroxide? How would the titration curve of hydrochloric acid solution with sodium hydroxide differ from the titration curve of

14. ## Math

Suraya has x apples and 8 oranges.How many apples and oranges does Suraya have altogether?Give your answer in terms of x.

15. ## Physics

An aircraft has a cruising speed of 100 m/s On a particular day, a wind is blowing from the west at 75.0 m/s If the plane is pointed due north, what would be the magnitude and direction of the velocity relative to the ground? If the pilot wishes to have a

16. ## chem

H2o2+3i+2h -----> I3+2H2o In the first 10.0 second of the reaction the concentration of I dropped from 1.000M to 0.868M a) calculate the average rate of reaction for iodine in this time interval. b) Determine the rate of change in the concentration of H

17. ## Chemistry

A 7.85 g sample of a compound with the empirical formula C5H4 is dissolved in 301 g of benzene. The freezing point of the solution is 1.05C below that of pure benzene. what are the molar mass and molecular formula of this compound?

18. ## physics

In a solar water heater, energy from the Sun is gathered by water that circulates through tubes in a rooftop collector. The solar radiation enters the collector through a transparent cover and warms the water in the tubes; this water is pumped into a

19. ## Maximum and Minimum

Its been awhile since I have done compleating the square, can you please help me? Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point. 19.f(x) = x2 - 2x + 1 And how

20. ## Math

Is the magnitude of an earthquake related to depth below the surface at which the quake occurs? Magnitude: 2.9,4.2,3.3,4.5,1.6,3.2,3.4,3.9 Depth:5.0,10.0,11.2,10.0,7.9,3.9,5.5,8.1 Equation: y=4.12+1.06x Question: does it make sense to predict the depth

21. ## algebra

for the function g(x)=5x^6-3x^3+x^2-x, list the possible rational zeros of g(x) and then use synthetic division to factor g(x) completely.

22. ## math

there are 1,320 ways for three students to win first,second,third place during a debate match. how many students are there on the debate team? explain your reasoning

23. ## statistics

1. On final examination in Business Law, the mean was 68 and the standard deviation was 12. Determine the standard scores of students receiving marks of 50?

24. ## calculus

A container company is tasked to make an open-top rectangular box with a square base. The box must have a volume of 108cm^(3). let the length of the sides of the square base be x cm and the height h cm. (1) what value of x will produce the minimum outer

25. ## physics

The temperature of 4.60 mol of an ideal monatomic gas is raised 15.0 K in an adiabatic process. What are (a) the work W done by the gas, (b) the energy transferred as heat Q, (c) the change ΔEint in internal energy of the gas, and (d) the change ΔK in

26. ## Chemistry

write balance chemical equation for gaseous hydrogen gas to form gaseous methane ch4 and liquid water.

27. ## Organic Chem

What is the product formed from the nitration of 1,2-dimethoxybenzene ( veratrole)? What would be the equation for the reaction. Details. Veratrole was mixed with glacial acetic acid.This mixture was then added dropwise to a solution of nitric acid and

28. ## geometry

what the angle between the tangents at T?

29. ## Science

Which is the number haploÏde of an organism possessing 18 pairs of equivalent chromosomes?

30. ## Chemistry

Two vessels are labeled A and B. Vessel A contains NH3 gas at 70°C, and vessel B contains Ne gas at the same temperature. If the average kinetic energy of NH3 is 7.1 10-21 J/molecule, calculate the mean-square speed of Ne atoms in m2/s2.

31. ## Chemistry

When 34.5 L ammonia and 39.5 L oxygen gas at STP burn, nitrogen monoxide and water are produced. After the products return to STP, how many grams of nitrogen monoxide are present? 4NH3+5O2->4NO+6H2O

32. ## Chemistry

How many grams of phosphorus react with 31.3 L of O2 at STP to form tetraphosphorus decaoxide? P4(s) + 5 O2(g) -> P4O10(s)

33. ## Algebra- Maximum and minimum.

I don't understand how to find the maximum and minimum. Determine whether the given quadratic function has a minimum value or maximum value. Then find the coordinates of the minimum or maximum point. 15.f(x) = -x2 + 2x - 4 20.f(x) = 2x2 - 4x 19.f(x) = x2 -

34. ## Math

The amount of money in cents in a jar containing d dimes and some nickels and quarters if there are 8 times as many nickels as dimes and 2 times as many quarters as nickels

35. ## Statistics

The length of pregnancies are normally distributed with a mean of 273 days in the standard deviation the 15 days. If 36 women are randomly selected find the probability that they have a mean pregnancy between 273 days in 275 day

36. ## Physical education

Did social class impact Althea Gibson life and career? How?

37. ## math

Enter your answer and show all the steps that you use to solve this problem in the space provided. A party store offers small balloons and large balloons. You can choose from pink, blue, green, and yellow balloons. You can choose from silver, gold, and

38. ## Math

The results of a survey are shown. In the survey, 92 students said their favorite dessert is candy. Pie: 15% Candy: 23% Cake: 27% Ice Cream: 35% 1) How many students were surveyed? students 2) How many students said their favorite dessert is cake? students

39. ## History

How does the Salem Witch Trials relate to women and work?

40. ## English

How do I write a persuasive thesis statement on distracted driving?

41. ## English

I need help starting my standard views essay or they say I say template. Americans today believe that blank I just need a couple of options to start it. Thank you

42. ## Story Problem

Two bikers bike4 miles north and 6 miles west. What is the shortest distance they must travel to get to their starting point?

43. ## Science

Is the Yacca Mountain facility currently in use? Why or why not?

44. ## English

What could be a theme statement for the poem Sympathy by Paul Laurenece Dunbar? I know the theme such as oppression or imprisonment.

45. ## Economic

Principles of economics: 1.All choices involve costs 2. Conseqences of choices lie in the future How would both of these principals apply to college/career ?

46. ## Economic

What’s the importance of benefits packages when choosing a career?

47. ## Science

what steps could be taken to control emissions levels?

48. ## Science

Would heavy snowfall in the ogallala aquifer region affect the recharge of ghe aquifer over the long term?

49. ## Science

What is the primary land use in the ogallala aquifer area of the U.S?

50. ## Math

a dairy farmer has black and brown milking cows. The farmer wants to know how much milk is produced on his farm daily. The farmer selects 15 black cows and 15 brown cows randomly by their tag numbers and logs the amount of milk produced each day for 1

51. ## History

How successful is the American enterprise system ?

52. ## History

Respond to a statement: The American Free Enterprise system is alive and well. If you don’t mind could you send me a link related to this statement

53. ## EPI

Is creating a responsible budget, savings and investing, and establishing credit worthiness show any key economic principles? Key economic principles: 1. People choose 2. All choices involve cost 3. People respons to incentives 4. The consequences of

54. ## Math

The scores for students are 40,41,42,43,45,47,49,50,51,51,54,57,59,60,61,63,67,69,70,71 What is the percentile for the score 51.

55. ## Science

Explain the key factors that make an area a biodiversity hot spot. Include its abiotic and biotic factors

56. ## Social Studies 7th Grade C.C.A

Hi my name is Niki and I am doing a social studies portfolio and the question is Would You Like To Travel Central America and I have to do research on it and analyze my research then make an itinerary then write a persuasive essay please help me understand

57. ## math algebra

Find an eqaution for the line passing through (1,3) and perpendicular to the line 3y=-2x+6

58. ## Physics

Suppose that at least 14.7 eV is needed to free an electron from a particular element, i.e., to ionize the atom. What is the lowest frequency photon which can accomplish this? And, what is the corresponding wavelength for that photon?

59. ## math algebra

when only the cold water valve is opened, a washtub will fill in 8 minutes. When only the hot water valve is opened, the washtub will fill in 12 mintues. When the drain of the washtub is open, it will drain completely in 7 minutes. If both the hot and cold

60. ## Social Studies

The First Amendment protects which rights? (Select 2) - the right to own a gun - the right to a fair trial ** - the right to practice a religion (or not) ** - the right to criticize the government - the right of owning property help

61. ## Math

A fertilizer covers 5/8 square foot in 1/4 hour. i don't understand how to work out this math problem. By the way i'm in 6th grade but technically doing advanced math so i'm doing 7th grade math. I don't know how to do this

62. ## Social studies

Branch of goverment that carries out the laws

63. ## Calculus

Find the y-intercept of the tangent line to y= -0.2/sqrt(6+5x) at(2.5,-0.04990597277) Thanks

64. ## Math

Find the y-intercept of the tangent line to y=-0.2/ã(6+5x) at (2.5,-0.0464990554975277) Thanks

65. ## Math

Consider the function f(x) for which f(0)=7 and f'(0)=7. Find h'(0) for th function h(x)= 1/f(x). h'(0)=

66. ## Math

Suppose f(x)=5/(x-2). f'(5)=-5/9. Use this to find the equation of the tangent line to the curve y=5/x-2 at the point (5,(5/3)). write your answer in the form y=mx+b where m is the slope and b is the y-intercept. The equation of the tangent line is.....

67. ## Chemistry

List the grams of bleach solution necessary to provide 0.931g of NaClO(laundry bleach is 8.25% NaClO by weight) and the mL of bleach solution that contains the necessary amount... NaClO=74.442 g/mol. Need 0.931 grams of NaClO. Density of NaClO solution is

68. ## Algebra

which ordered pair in the form (x, y) is a solution of this equation? (x+6)y=9 Possible Answers: A. (12,2) B. (3,1) C. (2,1) D. (4,1)

69. ## World history

How do enlightenment thinkers believe a person should rule ?

70. ## Social studies

True or false To accurately label exact locations on a map, geographers go to that specific location. If false what is correct answer

71. ## ds 71

A company sells its product for \$79. The company has marginal costs of \$37 and annual fixed costs of \$95,000. What is the annual total cost to produce 8,500 units of its product?

72. ## chemistry

40 ml of carbon dioxide was collected and is at 10 degree celsius and at 740 mm pressure.Calculate its volume at STP.

73. ## Chemistry

1)what potential impurities were removed during solventless aldol recrystallzation? 2) two solids with different identities are frequently mixed together & do not melt, why do you suppose that the solids actually melted? (why do you assume that it has been

74. ## chemistry

1) what potential impurities were removed during recrystallzation? 2) two solids with different identities are frequently mixed together & do not melt, why do you suppose that the solids actually melted?

75. ## statistics

the average yearly utility costs on Middleton is \$1722 with stdev of 146. assume that the utility costs follow a normal distribution. 1) What would the utility costs have to be so that only 7% of houses in Middleton have utility costs greater than this

76. ## Biology question plz

Which of the following depends on bacteria? conversion of dead organic matter to fossil fuel photosynthesis dissolution nitrogen fixation I think its A but I feel it could also be D, could you plz help?

77. ## Finance - Annuities

Natasha plans to deposit \$4,000 per year in her account for each of the next 4 years. Thereafter, she expects to deposit \$1,500 per year for another 4 years. All deposits are made at year-end. Interest rates are expected to be 8 percent for the next 2

78. ## math

5s/(s^2-t^2) - s/(s-t)

79. ## math

4c/7c-14 + 6c/14c-28

i need help in health subject for my son 5 grade Question 1- connect suppose you have a cold. this affects your physical health. does if affect your mental,emotional,family, and social health, too? explain why or why not. Question 2- practice healthful

81. ## chemistry

Analysis of aluminum-zinc alloy Mass of gelatin capsule 0.1284 g ambient temp. 22c mass of capsule plus alloy sample 0.3432g ambient temp_________K mass of alloy sample, m__________g barometric pressure 745 mm Hg mass of empty beaker 144.5g Vapor pressure

82. ## chemistry

i have to write lab report based on my determination of chemical formula & in lab we did experiment & found out the formula was cucl2*2h2o, in my lab report i have to start with mole to mole ratio how can i start writing that?

83. ## algebra

three students are running a race .how different ways can they finish the race

84. ## english

a group of tourists is being led through a famous cathedral by a guide. one family of four is japenese, but at least three other tourist in the goup ar not. All but five of the group are american what is the least number of tourists that can be in this

85. ## math

In vanessa's coin bank there are 4 times as many quaters as nickels, 2 fewer dimes than nickels, and 15 pennies. the total amount in the bank is \$5.80. How many of each coin are in the bank? assign a variable to unknown and write an equation to find

86. ## Chemistry

I don't know how to reply to an answer. First of all thank you! For the question I just asked about the titration curves. Would that mean that titrating with barium hydroxide would take half the volume that is used when titrating with sodium hydroxide? Oh

87. ## Chemistry

If two titrations were completed were completed: 1) the titration of HCl with Na(OH) 2)the titration of HCl with Ba(OH)2 (the concentrations of acid and base for both titrations are the same) How would the titration curves of each solution be different? I

88. ## Chemistry

What is the ph of the final solution when 10 mL of HCl is completely neutralized with 11mL of 0.1M Na(OH)?

89. ## calc

Use the Midpoint Rule to approximate the integral The integral from 2 to 7 of (–1x–6x^2)dx

90. ## Algebra

Write the equation in standard form. (2,8) m=9 What are the steps to do this?

91. ## math

if you know the number of faces on a pyramid you know the number of vertices true or false

92. ## statistic

For a given month, a random sample of 30 sales girls from a superstore has a sample mean of salary of RM 800 with standard deviations of RM 140. Estimate the mean monthly salary for all employees using the 95% confidence interval.(what does mean of 95%

93. ## Science

Of the three local winds, which do you think could be easily harnessed for the generation of electricity by a huge wind farm and why? Land and Sea Breezes,Mountain and Valley Breezes or Chinook and Santa Ana Winds.

94. ## chem

at 40 degree C , the vapour pressure of water is 55.3 mm of hg. calculate the vapour pressure at same temp. of 10%aques solution of urea??

95. ## geometry

How do you find the perimeter of a regular dodecagon whose side is 12cm

96. ## math

How long will it take a given quantity of carbon-14 to lose 99.9% of its radioactivity if the half life is 5730 years? The formula I have been given is Q=ae^rt This is using log and ln functions.

97. ## physics

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If,

98. ## physics

A glass window pane is exactly 23 cm by 38 cm at 10oC. By how much has its area increased when it temperature is 49oC, assuming that it can expand freely? Take the coefficient of thermal expansion for the glass to be exactly 9 x 10-6/Co

99. ## physics

An ideal monatomic gas initially has a temperature of 338 K and a pressure of 6.96 atm. It is to expand from volume 435 cm3 to volume 1310 cm3. If the expansion is isothermal, what are (a) the final pressure (in atm) and (b) the work done by the gas? If,