# Vicky

Popular questions and responses by Vicky
1. ## math

how to calculate vertical angle of cone

2. ## physics

a vehicle is accelerating on a straight road. Its velocity at any instant is 30 km/hr, after 2 s, it is 33.6 km/hr and after further 2 s, it is 37.2 km/hr. Find the acceleration of vehicle in m/s^2

3. ## science

HOW MANY ATOMS OF OXYGEN ARE PRESENT IN 8.8G OF CARBON(IV)OXIDE

4. ## math

Telephone company A charges \$3.00 for the first minute of any long distance call and \$0.50 for each additional minute. Telephone company B charges \$2.00 for the first minute of any long distance call and \$0.70 for each additional minute. If the cost of a

5. ## critical thinking

9. We shouldn’t take a chance on this new candidate. She’s from Alamo Polytech, and the last person we hired from there was rotten. Trying to figure out the Premise and Conclusion. Premise: She's from Alamo Polytech, the last person we hired from there

6. ## Finance

) What is your Average Payment Period if your Accounts Payable are \$20,000, cost of Goods Sold is \$200,000, and Sales are \$500,000?

7. ## Language Arts

1.)Which of the following sentences contains parallelism? a.)We sold two bikes at the garage sale, and we also sold four chairs, as well as receiving offers for three lamps. b.)I prefer new things, but some people like to buy things that other people have

9. ## Calculus AP

Evaluate the integral interval from [0 to pi] t sin(3t)dt Use integration by parts u=t and dv=sin(3t)dt. then du=dt and v=-cos(3t)/3 here is my problem but Im having problem to solve with pi. ∫t sin(3t)dt = -tcos(3t)/3 - ∫[-cos(3t)/3]dt =-tcos(3t)/3 +

10. ## physics

A boxcar of mass 250 tons at rest becomes uncoupled on a 4.0° grade. If the track is considered to be frictionless, what speed does the boxcar have after 11 seconds?

11. ## Social Studies Help ASAP

Why did the British want to expand control into the Ohio Valley in the mid-1700s? a. to force the French out of North America b. to put French settlers there under English rule c. to demonstrate Britain’s strength to France and Spain d. to gain access to

Find the area of a sector of a circle that has a central angle of 3π/8 and a radius of 7 cm.

13. ## chemistry

explain why a precipitate forms when silver nitrate solution is added to sodium chloride solution?

14. ## Government

What is a simple definition of The Voting Rights Act of 1965?

15. ## Functions-Math

find the value of k such that when 2x^3+9x^2+kx-15 is divided by x+5, the remainder is 0.

lim ((x^2-64)/(x+8)) x->-8

17. ## math

In a club 15 members choose from them a president , secretary and a treasurer. How many different states of candidates can be chosen?

18. ## chemistry

The label of a bottle containing a solution So of hydrochloric acid carries the following indications :hydrochloric acid of density 1190g/l percentage by mass 37%. We introduce a volume V=4.2ml of So in a volumetric flask of volume 500ml containing about

19. ## chemistry

The label of a bottle containing a solution So of hydrochloric acid carries the following indications :hydrochloric acid of density 1190g/l percentage by mass 37%. We introduce a volume V=4.2ml of So in a volumetric flask of volume 500ml containing about

20. ## physics

A rope of mass M uniformly distributed along its length L ,can slide without friction on a horizontal table. At instant to=0 the hanging part of the rope has a length b and the rope is held at rest .When it is left the rope begins to slide. At instant t

21. ## physics

A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing

22. ## One more Social Studies Help

Why did the British feel justified imposing the Stamp Act on the colonists? Select two. a. Similar stamp taxes were already used in England and Europe. b. The taxes protected colonists from Native Americans. *** c. Britain had spent money protecting

23. ## Statics

In a first semester unit there are four tests each of equal weight i.e. each worth 25%. Your average on the first three tests has been 62%. You need to get an overall average of 65% to proceed to the second semester. What percentage should you try to get

24. ## chemistry

The analysis of halogenated hydrocarbon gave the following results: A sample of mass m=255mg produces 273.7 mg carbon dioxide and 130.6 mg of water .A second sample of mass 87 is treated by hot molten sodium .The obtained mixture is dissolved in distilled

25. ## MATH

Mimo wishes to leave a waitress a tip. Mimo has five coins in his pocket, a penny, a nickel, a dime, a quarter, and a half-dollar. If he uses exactly three coins for the tip, how many different tips are possible? A. 15 B. 5 C. 20 D. 10 Crystal wants to put

26. ## Math help

How many squares in this figure? (1 point) 4.) 15 5** 20 10** Crystal wants to put a fence around her vegetable garden.Her garden is 5 ft wide and 4 ft long.She plans to put a post at each corner and at every foot.How many fence posts will Crystal need? (1

27. ## American History

Which of the following statements is most accurate regarding America's political climate between 1876 and 1896? A. Southern states tended to vote Republican. (B.) The influence of the president over Congress diminished. C. The party that won the

28. ## Governement

Please explain the Voting Rights Act of 1965

29. ## Government

How has the Voting Rights Act of 1965 expanded voting rights?

30. ## Science

Who is the author of this article Where is the article taking place? When was the article written: This is the article: "Robotics" World of Computer Science. Gale, 2002.

31. ## Biology

GENETICS PRACTICE PROBLEMS Worth 10 points each problem is either right or wrong 1. In humans, assume that brown eyes (B) are dominant over blue eyes (b). A blue eyed man, both of whose parents were brown eyed, marries a brown eyed woman whose father was

32. ## Chemistry

What is the value of the rate constant at 17 degrees celsius? The Ea = 122 kJ/mol I know I have to use ln k = ln A - Ea/RT.. but I don't know how to calculate it without known ln A and how do you find ln A Thank you for your help!

33. ## SCIENCE

WHY IS YOUR ESOPHAGUS WRAPPED IN SMOOTH MUSCLE AND YOUR TRACHEA WRAPPED IN BANDS OF CARTILAGE?

34. ## social studies

what is texas important important service industries I don't know what you mean by "important". Major employers of service type jobs are fast foods, cleaning, police, maintenance and repair organizations (automobile, aircraft, building), and state and

35. ## physical chemistry

I calculated that the denaturation enthalpy and entropy changes for chymotrypsin are: H = 418 kj/mol S= 1.32 kj/mol(K) Assume that, in the denatuartd state, each amino acid had three possible orientations. estimate number of amino acid in chymotrypsin

36. ## Chemistry

What is the balance half-equation for this conjugate redox pair permanegate ion and MnO2

37. ## math

Elle is 6 years younger than Felicia. Marta is twice as old as Felicia. If Marta is w years old, a) find the age difference between Marta and Elle. b) write an expression that shows the three girls' average age. Show how you found the answers.

38. ## Math

A pair of fruit flies reproduces and has 1,000 offspring. All 1,000 offspring have the alleles Gg. What is the most likely combination of alleles that each parent has, and why are other combinations not likely? Explain your answer.

39. ## math- precal

If a ball is hit with an initial velocity of 110 feet per second at an angle of 45 degrees from an initial height of 2 feet, how long will it be in the air?The following parametric equations are used to represent the location of the ball after t seconds.

40. ## Math

Using 27 blue patches and some white patches to make a quilt.The quil has a total area 540 Square inches. Each patch has an area of 5 Square inches .How much how much of the area of the quilt is white

41. ## Maths

A triangle has side 9cm 12cm 18cm the longest side of a similar triangle measure 12cm what are the length of other side

42. ## physics

Determine the ionization energy required to extract the electron totally out of a hydrogen atom, and put it at rest

43. ## physics

The index of refraction of water for a given monochromatic light in water is n=4/3. The wavelength of this light in water is 500nm. a) find the speed of this light in water. b) find the energy of one photon of this light . Does this energy change if this

44. ## physics

The index of refraction of water for a given monochromatic light in water is n=4/3. The wavelength of this light in water is 500nm. a) find the speed of this light in water. b) find the energy of one photon of this light . Does this enerdy change if this

45. ## Slope

Find the equation of the line that goes through (3,-4) with slope m=-1/4

46. ## math

you have 6 marbles each of a different color . In how many ways can they be arranged in a row?

47. ## math check my answer ?

What is the range of f(x)=−3x−1? the set of real numbers less than 0 the set of real numbers greater than 0 the set of real numbers greater than −1 the set of real numbers less than −1

48. ## chemistry

One has a solution Sa of ethanoic acid of concentration Ca=1×10^-2 mol/l and pH=3.4 One mixes a volume Va=60ml of the solution Sa of ethanoic acid with a volume Vb1=20ml of the Sb1 solution of ammonia of concentration Cb1=2×10^-2 mol/l. The pH is 5 One

49. ## chemistry

One has a solution Sa of ethanoic acid of concentration Ca=1×10^-2 mol/l and pH=3.4 One mixes a volume Va=60ml of the solution Sa of ethanoic acid with a volume Vb1=20ml of the Sb1 solution of ammonia of concentration Cb1=2×10^-2 mol/l. The pH is 5 One

50. ## physics

A train travelling at 30km/h stops when it's brakes are applied. The train suffers a deceleration our 2m/s. @. How long does the train take to come to rest? b) what is its final velocity?

51. ## physics

In the circuit we have E=48V, R=6 ohm and L=4H. We close the switch at the instant t=0, the current I in the circuit grows from zero to its maximum value Io, and the permanent phase is established. A) determine the value of Io. B) calculate the values of

52. ## physics

The self induced e.m.f created in a coil has the value of 24mV at the instant when the current is 4A and varies at the rate of 10A/s. What is the value of the self magnetic flux kn the coil at this instant?

53. ## chemistry

For the equilibrium: H2 + I2 2HI The equilibrium konstant Kc is equal to 50.5 at 448ºC. If [H2]o=[I2] o= 1 mol/l. What will the concentration of H2, I2 and HI be at equilibrium

54. ## physics

The characteristics of a horizontal and undamped spring-block system are k=400N/m and M=0.3kg.The position of the block is determined by its abscissa along an x'ox axis. When the spring has its natural length then x=0. a) the spring is stretched by

55. ## chemistry

what is the type of catalyst that corresponds the use of the platinum wire

56. ## physics

A semi circular rail of horizontal diameter AB=2R is placed in a vertical plane. Two particles S1 and S2 of respective masses m1 and m2 (m1

57. ## physics

we launched a solid of mass m on an inclined slide. The natural length of the spring is Lo. Before launching, the spring is compressed to a length L. After launching the center of mass of the solid reaches the point A of altitude Z with velocity v. Neglect

58. ## physics

A pendulum is formed of a particle of mass 100g suspended from the end of an inextensible string of negligible mass and of length L=100cm. The pendulum is shifted by an angle of 60 degrees from its equilibrium position about a horizontal axis passing

59. ## physics

Two particles A and B of respective masses M(B) and M(A) are connected together by means of an inextensible string of negligible mass. The string passes over the groove of a pulley of negligible mass. At instant to=0 the system S(pulley,mass,string) is

60. ## physics

A particle C can move along a slide placed in a vertical plane. Points A and B are at the same horizontal level. Determine with respect to B the point where the velocity of C is zero for the first time in the three following cases: a) C is released from A

61. ## math

How much talk time if call costs 36 cents a minute and i have 30 dollars?

62. ## chemistry

How could you prepare: a ) 2-chloropropane from 2-propanol? b) 2-butanone from 2-butanol? c) ethyl acetate CH3COOC2H5 from ethanol? d) 2-methyl-2-butene from 3-methyl-2-butanol?

63. ## math

Let f be the function defined on {-3, 1} by f (x)= (x+1)/x^2+ax+b and (C) its representative curve in an orthonormal system . Knowing that the two lines of equations x=1 and x=-3 are asymptotes to (C) calculate the values of a and b.

64. ## math

A tank is 5/7 full, when 440 litres are removed it goes to 2/5. How much litres does it contain in full capacity

The magnetic field strength along the axis (x'ox) of a solenoid is measured ( o being the center of the solenoid). The adjacent graph represent the length: (The graph represents the variation of B (mT) as a function of x (cm). The numbers on the y axis are

66. ## plz help physics!!!!

A proton is moving in vacuum along a straight path from A to B .It passes point A at the speed of 2000km/s. a)Calculate in J and in eV the kinetic energy of the proton at A. b)Calculate the value of the positive voltage U that should be applied between A

67. ## plz help physics

A proton is moving in vacuum along a straight path from A to B .It passes point A at the speed of 2000km/s. a)Calculate in J and in eV the kinetic energy of the proton at A. b)Calculate the value of the positive voltage U that should be applied between A

68. ## physics

An air condenser has an area of 100 cm^2 the plates being 4mm apart. It is connected in series with another condenser having plate area of 20cm^2 plates being separated by dielectric 0.1mm thick with E=2.5. If the potential difference across an condenser

69. ## physics

An air condenser has an area of 100 cm^2 the plates being 4mm apart. It is connected in series with another condenser having plate area of 20cm^2 plates being separated by dielectric 0.1mm thick with E=2.5. If the potential difference across an condenser

70. ## chemistry

Consider an isomeric mixture of alkenes of molar mass M=70g/mol. Determine the molecular formula of the alkenes.

Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m. Determine the resultant electric field at O when: a) q'=q b) q'=-q

Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m. Determine the resultant electric field at O when: a) q'=q b) q'=-q

Two point charges q and q' are placed respectively at two points A and B. Let O be the midpoint of [AB]. Charge q placed at A creates at O an electric field of strength E=9×10^6 V/m. Determine the resultant electric field at O when: a) q'=q b) q'=-q

Multiple choice (show your work if any): 1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C outside [AB] such that : a) AC=50cm b) AC=30cm c) AC=20cm d)

Multiple choice (show your work if any): 1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that : a) AC=50cm b) AC=10cm c) AC=20cm d) point C

Multiple choice (show your work if any): 1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that : a) AC=50cm b) AC=10cm c) AC=20cm d) point C

Multiple choice (show your work if any): 1) Two point charges q1=-10^-5 C and q2=-9×10^-5 C are placed respectively at two points A and B 40 cm apart. The electric field is null at a point C of [AB] such that : a) AC=50cm b) AC=10cm c) AC=20cm d) point C

78. ## chemistry

25ml of 0.01M KIO3 solution were put to react with an excess of KI. 32.04ml of the sodium thiosulfate solution were needed to titrate the triiodide ions that were present . What is the molar concentration of thiosulfate in the solution?

79. ## physics

A disk is free to rotate around its fixed axis of revolution (delta). The moment of inertia of disk around delta is J=4×10^-2 kg.m^2 This disk is initially at rest is submitted to the action of a couple whose moment is equal to 0.2 N.m What's the number

80. ## chemistry help

A solution of thiosulfate ions has been prepared by dissolving 4.5g of Na2S2O3.5H2O in 250 ml of solution. Calculate the concentration of the thiosulfate ions S2O3^2- in the solution

81. ## math

how to calculate vertical angle of cone

82. ## English

How do i go about writing an essay whose topic is "Sports- General, types of fans and influence on culture?"It is under classification and division in Successful College Writing.

83. ## Homeschool

A ibc with no lid is made by cutting four squares if side length x from each corner of a 10 cm by 20 cm rectangle sheet of metal. Sketch the graph of the function and state restriction 250 200 150 100 50 -5. 5. 10. 15 -50 -100 -150 -200 -260

84. ## math

what is the global maximum of the parabola y= -x^2 -12x +4

(4n-1)^2=16

86. ## French

Whats the partitive article for Je n'ai pas gateau?

87. ## social studies

Why did the British have problems after the French and Indian War? a.)they had less territory than before the war b.)they no longer had native american allies c.)they were faced with a devastating natural disaster after the war ended d.)they were left with

88. ## Social Studies

If you were a reform-minded person who, above all, loathed the social problems associated with alcohol, you would have been especially sympathetic to the A. Comstock Law. (B.) WCTU. C. Mugwumps. D. evangelical efforts of Dwight L. Moody. I chose B is this

89. ## anatomy

For my anatomy class, I need a to make a human bone such as a femur or any other bones in the human body. Any suggestions on a website?

90. ## health care

I have to do a debate on breaking bad news medically. I have the con side to it. Can you recommend some sites

91. ## english

I have to write a research paper on why ernest hemingway would be a good author for college students to ready. Any suggestions on where to start?

92. ## chem

Consider the following neutralisation reaction: 2 H3PO4(aq) + 3 Ca(OH)2 (aq) → Ca3(PO4)2 + 6 H2O Determine the volume of 0.75 M H3PO4 necessary to neutralise 35 ml of 0.45 M Ca(OH)2

93. ## math

Todds weight dropped from 220 pounds to 190 pounds. Cassidys weight dropped from 150 pounds to 135 pounds. Who had the greater percent weight loss?

94. ## math

the number of students at a university increases from 8000 in 1970 to 20,000 in 2000. what was the percent increase in enrollment from 1970 to 2000?

95. ## math

in a survey of 1,500 people who owned the same make of car, 600 indicated that they would buy the same make of car again. What percent of these people were satisfied with their car?

96. ## Math

at a large state university, 60% of the students who apply are accepted. Of those who are accepted, 40% actually enroll. If 20,000 students apply, how many actually enroll?

97. ## math

calculate , in newtons correct to the nearest unit, the force necessary to maintain a body of mass 2kg in uniform angular speed of 2rev/s in a circle of radius 0.2m

98. ## math

calculate,in terms of weight of 1kg, the force necessary to maintain a body of mass 147kg in uniform speed of 10m/s in a circle of radius 5m

randy had saved 5000 in an account that offered r% simple interest per annum on 20 march 2008. If the interest on 6 june 2008 was 40, find the exacttime of the investment