# Questions Asked onJanuary 18, 2015

1. ## physics

A model rocket is launched straight upward. Its altitude y as a function of time is given by y=bt−ct2, where b = 80m/s , c = 4.9m/s2 , t is the time in seconds, and y is in meters. 1. Use differentiation to find a general expression for the rocket's

2. ## physics

An object is moving in the x-direction at 1.1m/s when it undergoes an acceleration a⃗ =0.56j^m/s2. Find its velocity vector after 4.8s . Express your answer as a comma-separated pair of components. Express your answer using two significant figures

3. ## History

what are two themes that would be appropriate for thematic time lines of important events from prehistory to A.D.1600.

5. ## Physics II

A large cylindrical water tank 11.5 m in diameter and 13.5 m tall is supported 8.75 m above the ground by a stand. The water level in the tank is 10.6 m deep. The density of the water in the tank is 1.00 g/cm3. A very small hole is formed at the base of

6. ## maths

Mike asks Billy to help him run his lemonade stand. He’ll either pay him 2/5 of ½ of the stand’s profits, or 1/3 of ¾ of the stand’s profits. Which should Billy choose to maximize the amount he will earn, and by what amount will his earnings be

7. ## Chemistry

Iron 3 hydroxide reacts with acetic acid to form iron 3 acetate and water. If 45.4g of water are formed,what mass of iron 3 acetate will be produced? •Fe(OH)3+3HC2H3O2--->Fe(C2H3O2)+3H2O 45.4H2O( ? Fe(C2H3O)) ---------------------------------------- ( ?

8. ## physics

You're sailboarding at 6.1m/s when a wind gust hits, lasting 6.8s accelerating your board at 0.49m/s2 at a 35∘ to your original direction. 1. Find the magnitude of your displacement during the gust. Express your answer using two significant figures. 2.

9. ## Civics

Which of the following is true about laws in the united states? They are made by the police The forbid or require certain actions*** They are invalid unless every citizen has voted to accept them They prevent criticism of the government.

10. ## Civics

How would you categorize the obligations and services of state and local governments as compared to those of the federal government? State and local governments provide, useful services, while the federal government tends to provide unnecessary services.

11. ## Algebra HELP!!

Water coming out from a fountain is modeled by the function f(x) = -x^2 + 8x + 2 where f(x) represents the height, in feet, of the water from the fountain at different times x, in seconds. What does the average rate of change of f(x) from x = 1 to x = 4

12. ## physics

A car, initially going eastward, rounds a 90 ∘ curve and ends up heading southward. If the speedometer reading remains constant, what is the direction of the car's average acceleration vector? Express your answer using three significant figures.

13. ## Math

A students tuition was 2800. A loan was obtained for 5/7 of the tuition. How much was the loan

14. ## physics

A car, initially going eastward, rounds a 90 ∘ curve and ends up heading southward. If the speedometer reading remains constant, what is the direction of the car's average acceleration vector? Express your answer using three significant figures.

15. ## Chemistry

A sealed container comtains 1.50 mol of nitrogen gas, 2.00 mol of oxygen gas and 3.50 mol of argon gas. If the total pressure is 900 kPa, what is the pressure of the nitrogen gas?

16. ## Theory of machines

A locomotive is running at a constant speed of 100 km/ h. The diameter of driving wheels is 1.8 m. The stroke of the piston of the steam engine cylinder of the locomotive is 600 mm. Find the centripetal acceleration of the crank pin relative to the engine

17. ## Physics

The earth has about 80 times the mass of the earth’s moon. The gravitational force exerted on the moon by the earth has what relation to the gravitational force exerted on the earth by the moon? 1. the same as 2. zero; the earth exerts a force on the

18. ## Mathematics arithmetic sequence

The sum of second and sixth terms of an arithmetic sequence is 4. The third term is 24 more than eleventh term. So determine the first three terms of the sequence.

19. ## Chemistry

Consider the titrtation of 25.0mL of 0.0100M Sn2+ by 0.0500M Ti3+ in 1 M HCL, using Pt and Saturated Calomel Electrodes to find the endpoint. F=96486.7 Cmol E0 Sn4+/Sn2+ =0.15V E0 TI3+/TI+ = 1.28 Esce = 0.241V R=8.3141 J K Mol (a) Write the balanced

20. ## physics

You're sailboarding at 6.1m/s when a wind gust hits, lasting 6.8s accelerating your board at 0.49m/s2 at a 35∘ to your original direction. 1. Find the magnitude of your displacement during the gust. Express your answer using two significant figures. 2.

21. ## chemistry

A 6.00 L balloon contains helium at SATP at ground level. What is the volume when it floats up to an altitude where the temperature is 10.0 degrees C and atmospheric pressure is 91.5 kPa

22. ## 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

23. ## Arithmetic

The Gardiner dam located 100 km south of Saskatoon is largest earth filled dam in the world. Upon it's opening in 1967, engineers discovered that the pressure from lake deifenbaker had moved the clay based structure 200 cm downstream. Since then, then the

Identify and correct the errors in the following to create parallel structure: To narrow a web search a. Put quotation marks around a phrase when you want an exact term. b. Many search engines have wild cards (usually an asterisk) to find plurals and other

25. ## math

The sum of first 12 terms of an arithmetic series is 186, and the 20th term is 83. What is the sum of first 40 terms?

26. ## Civics

To which major cultural region should you move if you want t be close to large cities and most famous universities? Midwest*** Northeast South West Fast Please!!

27. ## algebra

In a survey of a TriDelt chapter with 50 members, 20 were taking mathematics, 32 were taking English, and 6 were taking both. How many were not taking either of these subjects?

28. ## Civics

Henry is developing a plan of action to resolve a local issue in his community. Which of the following actions would be best for Henry to complete first? Making a long list of alternatives Learning as much as he can about the issue *** Making public

29. ## Civics

When conducting a stakeholder analysis, a group identifies the individuals or groups affected by a proposal action. A citizen group wants to open a new youth center in a location currently zoned for light residential use. The group is required to perform a

30. ## Art

define two color schemes that a color wheel could help you identify.

31. ## Statistics

An instructor asked students to name their favorite color. An appropriate graph to display the data is a... A) histogram B) pie chart C) time plot

32. ## Calculus

1. The radius of a sphere is expanding at a rate of 14 in/min. a) Determine the rate at which the volume is changing when the radius is 8 in. b) Determine the rate at which the surface area is changing when the radius is 8 in. 2. A particle moves along a

33. ## Physics

A cannon is fired at 30 degrees above the horizontal with a velocity of 200 m/s from the edge of a 125 m high cliff. Calculate where the cannonball lands on the level plain below.

34. ## maths lit, life sciences, history, goegraphy

I'm in grade10 and I'm doing does subjects I just wonder wich job can I get when I do does subjects???

35. ## Civics

Which quotation(s) from the united states constitution provides for a federal; system of federal government? Statement I:- "The … Manner of Elections for Senators and Representatives shall be prescribed (will be decided by ) each state Legislatures; but

36. ## Math

If f (x)=x+2 , g(x)=-4x+3, and h(x)=x^2-2x+1, find each value. 1. (f x g x h) (3) 2. (h divided by fg) (-6) 3. [ g o ( h o f)] (-4) If f(x)=5x , h(x)=x^2+6x+8 , solve f[h(a+4)]

37. ## Physics

An automobile travels a distance of 12 km in 4 minutes. It then moves the next 12 km in 2 minutes. Please help me to calculate its acceleration which is constant throughout the motion. Thanks in advance ))))

38. ## Maths

Consider the sequence 13;11;9;7;5... A) show that Tn+T15-n=0

39. ## Math

Hi Ms. Sue can you let me know if my answers are right? Anyone who can help check my answers will be greatly appreciated! Thank you! My answers are the ones with the *** after them. 1. –9x – 5 = –95 a. 17 b. 11 *** c. 10 d. –10 2. w over four – 4

40. ## physics

Write an expression for a unit vector at 45∘ clockwise from the x-axis. Express your answer in terms of the unit vectors i^ and j^.

41. ## Chemistry

Use molar gas volumes to convert the following gas volumes to amount in moles. A) 1.5 L of carbon monoxide gas at SATP B) 21.5 L of fluorine gas at STP

42. ## Physics

A old Chevy accelerates at a rate of 3.8 m/s^2. How much time would it take to reach the speed limit of 100 km if the car was travelling at the speed of 70.0 km? a) 2.9 s b) 3.7 s

43. ## Physics

A 50 g lunch pail is lifted up 500 m. If the work required to do this was 1450 J, what's the acceleration? W= mad 1450 = (0.05 kg)(a)(500m) 1450 = 250a 5.8 m/s^2 = a If a 750 g mass is accelerated at a rate of 11.0 m/s^2 for a distance of 3.0 m, how much

44. ## math

A family has an annual income of 28800. Of this 1/4 is spent for food, 1/5 for housing, 1/10 for clothing, 1/9 for savings, 1/4 for taxes, and the rest for other expenses. How much is spent for housing?

45. ## Career

Of the following career paths, which is NOT likely to have an apprenticeship program? Electrician Carpenter Accountant Fire Fighter What is the main difference between a college and a university? Only universities offer 4-year degree programs Only colleges

46. ## Chemistry

What will the pH be if 15 mL of 0.1 M HCl are added to the buffer obtained by mixing 70 mL of 0.5 M CH3NH2 and 30 mL of 1.0 M CH3NH3+Cl-? (Kb for CH3NH2 is: 5.2 x 10-4 ) I'm having a hard time figuring out what to do first. is the ICE table come in handy

47. ## English

How would I answer this? I am so sorry, but I just can't afford to have you finish the job. My largest wholesaler just went out of business and I don't know what to do. That was my biggest client, so I am not sure if I can afford to expand. I wish you had

48. ## chemistry

Under SATP, magnesium was reacted with acid and 500 ml of hydrogen gas was collected over water. A) what is the vapor pressure of water? B) What is the pressure of the hydrogen gas? C) What amount of hydrogen was produced? I only know how to do the law of

49. ## Chemistry

Why is the carbonate solution boiled before titrating?

50. ## Algebra

Simplify the radical expression square root 48a squared b to the 7th all beneath the sq rt sign I have no work to show, can't remember the steps to solve

51. ## Physical science

Is a chemical reaction the same as a chemical change i need to know so that i can plug it in to answer a question

52. ## algebra

a car rents for \$45 per day plus 21 cents per mile you are on a daily budget of \$66 what milage will call you to stay within your budget

55. ## algebra

From a survey of 100 college students, a marketing research company found that 70 students owned iPods, 50 owned cars, and 40 owned both cars and iPods. (a) How many students owned either a car or an iPod (but not both)?

56. ## Civics

"__________ should be upheld by all political parties. They would neither advise others to break the law, nor encourage others to do so even when the strongly disagree with the legislation put forward by the government of the day.' Which phrase or term

57. ## algebra

Montgomery College has a 64-piece band and a 35-piece orchestra. If 14 people are members of both the band and the orchestra, can the band and orchestra travel in two 45-passenger buses?

58. ## Civics

Which of the below concepts most closely relates to reserved powers, delegated powers, and concurrent powers? Shared powers*** The amendment process Judicial review Federalism

59. ## Civics

What must be true of a bill which has become law at a federal level? It must have been signed by the president It must be in the best interest of all Americans It must have passed both the house and the senate*** It must have been introduced into the

60. ## Civics

In the case The Senate Of Tennessee V. John Thomas Scopes, high school biology teacher John Scopes was accused of teaching content that violated a Tennessee law that stopped public school teachers from teaching evolution. Scopes voted this law , but felt

61. ## Social Studies

What immediate impact did European colonization have on Caribbean South America?

62. ## Statistics

When ordering vinyl replacement windows, the following variables are specified for each window. Which of these variables is quantitative? A) window style- double hung, casement, or awning B) window style- single pane or double pane C) area of the window

63. ## Statistics

A survey or college students collected information on several variables: distance from home, age, major, gender, and class. The variable major is A) neither categorical nor numerical B) categorical C) quantitative Please help :)

64. ## French

Is "vieil homme" or "homme vieil" correct? I think it is the former because it describes age.

65. ## Civics

You are governor Of Florida, and you are considering running for president of the united states. What may you be able to do as governor they you will be unable to do as president? Require information in writing of executive officers Appoint a justice to

66. ## algebra

Sam jumped off a diving board into a pool her height as a function of time is modeled by the function h (t)=-20 to the second power+20t+16 where t is time in seconds h is height in feet how long did it take sam to reach her highest height what is the

67. ## Civics

Teachers, doctors, and lawyers need professional licenses in order to perform their jobs legally. Who has the authority to issue these licenses? School boards Congress The state government*** City police

68. ## physics

As a warm-up for their juggling act, two clowns are tossing balls straight up in the air and catching them. While following the balls with his eyes, Joey says, ”Isn’t it strange how they just stand still in the air for a moment before they fall back

69. ## To Devron

Since you are a biochemist please look at the post below by C. I tried answering the question but I really don't understand the question. Perhaps you can help.

70. ## Federal Gverment

What is a example of service provided by federal government?

71. ## English/Jargon

Can some help me revise this sentence to eliminate jargon and use short familiar words? I just need to see how one is done so I can complete the rest of the questions myself. With regard to the aforementioned letter of July the 15th we expect to expedite

72. ## Health/Brain Tumors

If you have a brain tumor and it grows, can it make you lose your ability to walk?. It causes pressure/irritate something I believe

73. ## PED 212

During which stage of play where a child is no longer concerned about what other children are doing?

74. ## Mathematics

A car travelling at an average speed of 55kph leaves Town A for Town B a distance of 120 kilometres. At the same time, another car, travelling on the same highway at an average speed of 45kph, leaves Town B for Town A. In how many leaves will they meet?

75. ## Alcohols,phenols&ethers

How2 convert CH3OH into CH3CH2OH

76. ## chemistry

calculate the volume of oxygen at 15 degree Celsius and 745mmHg pressure. which could be obtained by heating 10g of potassium trioxochlorate(v)

77. ## Physics

the coefficient of friction between block A and the horizontal surface is 0.43. What must be the weight of the hanging block B if this block is to descend at constant speed once it has been set into motion? Mass of block A is 5.0 kg

78. ## Math

If w is some number between 3 and 10, which of the following could be the average of the numbers 4,5,6,7,9 and w? (A)4.6 (B)5.1 (C)6.3 (D)7.9 (E)8.2

79. ## Algebra

f(x)=x^2+x-12 g(x)=x-3 Solve (f/g)(x) and state the domain

80. ## Math

How do you write a quadratic equation with information saying that it opens upward, has a pattern of 1, 3, 5, and a vertex of (-4,5)?

81. ## PED 121

Question 3. 3. Lesson plans should be infused with local, state and national standards in order to support (Points : 1

82. ## Math

Concert took in \$162000. Tickets were \$8.50 per student and \$12.50 per adult. Total if 15000 people attended. How many adults came to the concert?

83. ## Maths lit Business studies Economics History

im in grade 10 and i want to know what jobs can i do with these subjects

Is it better if canadian dollar has high value or low value for canada. I think high value is better. But I'm not sure

Find the total number of integers between 10 and 1000 that are divisible by 3.

A wire of length 380 cm is cut into 10 pieces.Each piece is then bent to form a square.The dimensions of the first three smallest squares are shown below.Find the value of x and hence,the area of the eighth largest square. x cm[ ] (x+1)cm [ ] x cm (x+1)cm

87. ## Life science,history,geography,math literacy

Is it possible to become a law while you are doing those subject

88. ## math

I used 2/5 of my money in one store and 1/3 of what remained in a second store. If I had exactly 56 pesos left how much money did I have at first?

89. ## math

Kate has 78 foreign stamps; she has 15 less than twice as many Philippine stamps. How many stamps has she?

90. ## Math

In his first three years of coaching basketball at North High School, Coach Lucas' team won 8 games the first year, 17 games the second year, and 6 games the third year. How many games does the team need to win in the fourth year so the coach's average

91. ## science

when will the resultant of the two vectors be at a maximum

92. ## math

the population of a town is modelled by the functions p(t)=6t2+110t+3000. when will the population reach 6000? thanks

93. ## math

A car traveled at 50km/h for 4 hours and at 60km/h for 3 1/2 hours. What was the average speed for the whole journey?

94. ## Physical Science

how do i find the number of molecules in a packet of sweetners (splenda, equal, sweet & low).

95. ## Science/engineering

What part does gravity play in the function of the water clock? Explain.

96. ## chemistry

The combustion of a compound which contains only C and H yields 2.58 g of CO2 and 0.53 g of H2O. What is the empirical formula of the compound?

97. ## physics

Write an expression for a unit vector at 45∘ clockwise from the x-axis. Express your answer in terms of the unit vectors i^ and j^.

98. ## Algebra Help!!

If 5p = -100 + 3Q^2, which of the following could Q possibly be?

99. ## Math

A boat has a speed of 4 m s −1 (relative to the surrounding water) and a heading of 170◦ . There is a current flowing from a bearing of 105◦ at a speed of 2.5 m s −1 . Take i to point east and j to point north. (a) Express the velocity u of the

100. ## geometry

A square playground has a perimeter of 2800 feet. It has a paved 6-foot walkway around it. What is the area of the walkway in square feet?

101. ## Calc

Find the point on the parabola x+y^2=0 that is closest to the point (0,-3).

102. ## geometry

I am given triangle EDF with angles E and F being congruent. What is the perimeter of the triangle if ED= 2x+8, EF= 3x-6, and DF= 4x-6.

103. ## Math

Ms. Sue, Here are my questions you told me to repost. Thank you! I appreciate your help. 14. Mark weighs 74 pounds. Together, he and his sister weigh six pounds more than three times the weight of his sister. What is the weight, w, of Mark’s sister? a.

104. ## english

How do I fix this sentence to create parallel structure? The university is one of the largest employers in the community, bring in substantial business, and the cultural impact is also big.

105. ## History

I'm writing a research paper and i need help finding out what these me on a website. • Timeliness: • Objectivity: • Writing Style and Mechanics: • Graphics: • Links:

106. ## MATHEMATICS

THE FIFTH TERM OF AN ARITHMETIC SEQUENCE IS 23 AND THE 12TH TERM IS 72.AND THEY SAY DETERMINE THE FIRST THREE TERMS OF THE SEQUENCE AND NTH TERM

107. ## statistics

The 2003 Statistical Abstract of the United States reported the percentage of people 18 years of age and older who smoke. Suppose that a study designed to collect new data on smokers and nonsmokers uses a preliminary estimate of the proportion who smoke of

108. ## Math

Q#1-josh just put new tires on his car. if the wheels have a diameter of 14 inches, determine how far will the wheels travel in 3 revolution, to the nearest hundredth? Q#2-Melanie wants to put ribbon around the circumference of a circular section of the

109. ## English

are they assertive,non assertive, or aggressive? You never return my phone calls. I am not sure when I can meet. I'm pretty busy. If we take the two o'clock train, we can get to the theater in time to have dinner before the show. The last designer I worked

110. ## Algebra

let f(x) = x^3 − 2 and g(x) = ^3√ x − 2 I can't figure out if these are inverses for each other, I don't know how to put in f(g(x)) or g(f(x)) and have an answer

111. ## science

explain an animal cell in your own words and two things each part does

112. ## Math

An explosion has occurred in Canada. Its blast radius was a regular circle that can be modelled by the equation x2 +y2=100, where x and y are measured in km. The blast destroyed everything within the circle. a) Canada has 4 fire stations located at the

113. ## Math

Planner for a festival is trying to decide what to charge for ticket prices. Based on sampling they determine that if they charge \$400 for a weekend pass, 40000 people will attend. However it has been pointed out to them that for each \$10 reduction in

114. ## Mat 116 - Algebra

Simplify (2x)^3 Thanks for the help!

115. ## Mat 116 - Algebra

Simplify x^2*x^3*x^4

116. ## Algebra 1a

Simplify (xy)^-3/(x^-5y)^3

117. ## physics

A block of mass 10kg is pulled horizontally by a force of 75N that makes an angle of 37° to the horizontal whose coefficient of friction is 0.4 . what is the acceleration of the block

118. ## geometry

When looking at a quilt pattern, How do you describe the minimum number of translations of the original pattern A

119. ## chemistry

20 mL of propene is reacted with 70 ml of hydrogen at STP to produce propane, according to the equation. Calculate the volume of H2 gas consumed

120. ## Math

8-i/2+3i write complex # in standard form. I know to FOIL, not sure if I did it right, I got -13/4-9i then I'm not sure what to do next or if I'm done...so lost can anyone help me?

121. ## Math

Does (2+5i)+(-2-4i) equal to 0+1i, or i?