# Questions Asked onFebruary 28, 2008

1. ## right triangles can't have decimals in the angles?

why can't a right triangle have decimals in the other two angles? it has a right angle, therefor the other two must add up to equal 180, correct? well i did my calculations, and i got 53.6 degrees for angle 1 and for angle 2, 36.4 degrees. they all add up

2. ## Physics

Select which of the following statements are True or False. Assume Newtonian Mechanics. 1.The work required to lift a mass one meter depends on the speed at which it is raised.. 2.The acceleration of an object is same in all inertial reference frames.

3. ## chemistry

Assuming that sea water is a 3.5 wt% solution of NaCl in water, calculate its osmotic pressure at 20 deg C. The density of a 3.5% naCl solution at 20 deg C is 1.023 g/mL. How do I go about solving this?

4. ## Prealgebra

The sum of an integer and the next greater integer is at most 15. Write an inequality to find the lesser integer. Then slove for the lesser integer.

5. ## physics

The electric field in a region is given by E=ayi + axj, where a= 2V/m^2 is a constant. What is the electric potential difference between the origin and the point x= 1m, y= 2m? Do I use the formula E= - deltaV= - (V/x)i+(V/y)j+(V/z)k)?

6. ## trig

If cos A =1/3 with A in QIV find cscA/2

7. ## chemistry

write the formula for and indicate the charge on each of the following ions: a) sodium ion b) aluminum ion c) chloride ion d) nitride ion e e)iron (II) ion f) iron (III) ion

8. ## Biology

What is the effect of substrate concentration on enzyme activity? How does enzyme activity change as substrate concentration decreases? Explain your observations by discussing this reaction on a molecular level.

9. ## English

whats the word that means your not lying but not telling the truth. like not telling the whole truth

10. ## physics

A sphere of radius a carries a volume charge density p=p (r/a)^2. Find the electric field inside and outside the sphere. I don't know what equation to use. Do I use electirc field due to point charge?

11. ## trig

Use half-angle formulas to find the exact value for the following cot 75 degrees

12. ## workshop

Could someone help me with this. Directions Create in-text citations by following the directions for each of the following sources. Example Practice Directions: Create an in-text citation using the information from the following book. Mention the author in

13. ## science

A substance in a solid at room temperature. It is unable to conduct electricity as a solid but can conduct electricity as a liquid. This compound melts at 755 degrees celsius. Would you expect this compound to have ionic bonds, metallic bonds, or covalent

14. ## chemistry

the question reads: a) balance the equation: H3PO4 + Ca(OH)2 --> Ca3(PO4)2 + H2O b)what mass of each product results if 750 mL of 6.00 M H3PO4 reacts according to the equation? i balanced it with: 2H3PO4 + 3Ca(OH)2 --> Ca3(PO4)2 + 6H2O but i'm not sure

15. ## micro economics

pb = 70 -0.0005qb(brand name) pp = 20-0.0002qp (private label). Marginal cost is a constant \$10 per tire.quantities are measured in thousands per month and price refers to the wholesale price. marginal cost is a constant \$10 per tire. american currently

16. ## managerial economics

The Harley-Davidson motorcycle company, which had a copyright on the word "hog," applied for exclusive rights to its engine sound. Why would a company want copyrights on two such mundane things? In my opinion. The reason for the two mundane things is to

17. ## Science

I don't understand this question... Which side of the chemical equation would energy be located on in an endothermic reaction? I understand that in an endothermic reaction it absorbes energy.

18. ## Science

Why do all salts crystals have a distinctive cubic shape? And what happens to these atoms during this chemical reaction?

19. ## Chemistry

Please Help me with my chemistry Review I have a test tommorow? Please help me with my review my test average is low and i need at least a b to pass the class for the six weeks I am freaking out!!!! I care more about showing work i don't want answers I

20. ## History

What were two intended outcomes of the Green Revolution and two unintended outcomes of the Green Revolution?

21. ## is there a vertical shift for sec graphs?

for instance, what is the vertical shift for: y = 1/2secx + 1 *** by the way, that is secx + 1, not sec(x + 1)

22. ## trig

Graph the following from X = 0 to x = 2 pi 2cos 6x cos4x + 2 sin 6x sin 4x

23. ## Electrostatics

A linear charge rho L = 2.0 uC lies on the y-z plane. Find the electric flux passing through the plane extending from 0 to 1.0m in the x direction and from -infinity to infinity in the y direction. Alright, so the formula to use is: flux =

How do you get these problems?? 1 3/4 + 4/5 and 3 1/8 - 1 1/2

I don't understand these problems =/ How many inches are in 3/8 of a foot? How long would it take a car traveling 60 mph to go 250 miles?

26. ## Chemistry

A 3.5 liter gas sample at 20 degrees celcius and a pressure of 650 mm Hg is allowed to expand to a volume of 8570mL. The final pressure of the gas is 0.60 atm. What is the final temeperature of the gas in degrees celcius. Can anyone please show me the

27. ## writing

what is wrong in this sentence Jonna and Rada are walking up the hill.

28. ## Chemistry

Samples of neon and helim are placed into separate containers connected by a pniched rubber tube as shown. When the clamp is removed and the gases are allowed to mix, what is the final pressure of the neon? The volume of the tube is negligible. 5.00L, 654

29. ## writing

whatis wrong withthis sentence Yesterday Jonny pushed the milk into a ball.

30. ## science

What is it called when an earthquake make mud?

31. ## criminal justice

create an incident report about a bank hold-up, using well constructed paragraphs, logical transitions, consistency, and professional tone. Only two tellers were in the bank at the time of the robbery. answer the question who, what, when, where, why, and

32. ## geometry

find the measure of angel R in quadrilateral RSTW if the measure of angle R= 2x, the measure of angle S= x-7, the measure of angle T= x+5, and the measure of angle W= 30.

33. ## writng

what is wrong in this sentence yesterday jonny will push Milk into a baul.

34. ## science

1.when air is cold, it has less ______. 2.the expansion joints _______ when it is cold outside. 3.the expansion joints ______ when it is hot outside. 4.what might happen to a road without expansion joints? The _____ is a blank need answer please and 4 need

35. ## science

what normal kitchen ingredient will extract water from a grape

36. ## physics

A bullet of mass m= 0.0290 kg is fired along an incline and imbeds itself quickly into a block of wood of mass M= 1.55 kg. The block and bullet then slide up the incline, assumed frictionless, and rise a height H= 1.65 m before stopping. Calculate the

37. ## law and ethics in medicine

the officer hires an employee who's deaf, but who can lip-read. what will the employer have to do in terms of this employee's job duties to comply with the americans with disabilities

38. ## us history

when fdr served 4 terms, which president's record did he break?

39. ## science

A _____________________ is an earthquake that occurs after a large earthquake in the same area

40. ## science

ocompare and contrast an house with the parts of cells

41. ## micro economics

Marginal cost is a constant \$10 per tire.quantities are measured in thousands per month ans price refers to the wholesale price. marginal cost is a constant \$10 per tire. american currently sells brand name tires at a wholesale price of \$28.50 and private

42. ## math

49 divided by n = 7 ( please show work thank you)

43. ## CHEMISTRY

write formulas for the binary ionic compounds formed between the follwing elements a) sodium and iodine b) calcium and sulfur c) zinc and chlorine d) barium and fluorine e) lithium and oxygen

44. ## Maths

Solve for x (exact solutions): sin x - sin 3x + sin 5x = 0 ¦Ð ¡Ü x ¡Ü ¦Ð ---------------- Thankyou. I tried find the solutions on my graphics calculator but however, the question is to find the EXACT solution(s) for the equation so I guess it will

45. ## math

Neisha is making punch. to make the punch. she needs 2 pints of lemonade. she only has 1-cup measure. how many cups of lemonade should Neisha use? A 2 cups B 3 cups c 4 cups D 5 cups ( please show work )

46. ## ss

what mountain range runs along the western coast of south america?

47. ## MATH

a vase in the shape of a cube has a side measuring of 7 inches which of the numbers below is the best estimate of how much water it will hold? a 125 in3 b 200 in3 c 300 in3 d 350 in3

48. ## Community Corrections

Explain the correctional officer suculture. How does this subculture create ethical issues of correctional officers?

49. ## Manangerial Accounting

A company had a loss of \$3 per unit when sales were 40,000 units. When sales were 50,0000 units, the company had a loss of \$1.60 per unit. determine contribution margin determine fixed costs determine the break even point in units

50. ## chemistry

the third quantum number, m, indicates what property of the electron?

51. ## calculus

i have a problem figureing out this question do you have any help? need to find the input and output of these numbers input 2 & output 9, input0 & output7, input-9 & output-2, input-20 & output-8 nothing seems to work. help me please

52. ## chemistry

the third quantum number, m, indicates what property of the electron? a) orbital b) spin c) charge d) energy level

53. ## math

a vase in the shape of a cube has a side measuring of 7 inches which of the numbers below is the best estimate of how much water it will hold? a 125 in3 b 200 in3 B 200 in3 c 300 in3 d 350 in3 d 350 in3

54. ## managerial economics

You own a small bank in a state that is now considering allowing interstate banking. You oppose interstae banking because it will be possible for the very large money center banks in New York, Chicago, and San Francisco to open branches in your bank's

55. ## Social Studies

What form of government does Ireland have? Is it stable? Do they have any allies? I've been surfing the web for a really long time now, searching for the answers to these questions. I'm really stuck...

56. ## statistics

Can someone please explain to me the procedures for getting an answer to the questions. Step by step would be great since I'm very confused. I know it's probably simple. * Numerous studies have demonstrated that listening to music while studying can

57. ## chemistry

Write an equation for the formation of ions whe KOH is dissolved in H2O

58. ## math

which number sentence below shows the circumference of a circle is the diameter is 10 centimeters? A 3.14 X 5= 15.7 cm C 10x5=so cm B3.14 x 10= 31.4 cm D3.14x5 squared= 78.5

59. ## chemistry

how many sublevels exist in the fourth principle energy level? a) 2 b) 4 c) 16 d) an infinite number

60. ## physics

A 62.0 kg diver falls from rest into a swimming pool from a height of 3.50 m. It takes 1.92 s for the diver to stop after entering the water. Find the magnitude of the average force exerted on the diver during that time.

61. ## history art

what is the rejection of medieval style and influences of byzantine

62. ## biology

what are the differences between mitosis and meiosis!?

63. ## Math

Given that f(x) = 2sinx - cosx - Write f(x) in the form Asin(x+a) - Find the maximum value of 2sinx - cosx - Find the lowest positive value of p such that f(x) = f(x + p) Thankyou. All help is appreciated. I'm really struggling on this assignment.

64. ## SOCIEL STUDIES

THE DENMARK STRAIT SEPARATES WHAT TWO LARGE ISLANDS

65. ## spanish

how do you say "the trip was a very great experience."

66. ## math

you are putting in a 20ftx30ft rectangular pool. your pool must be surrounded by a concrete sidewalk of uniform width and 3in thick. write an expression in terms of x to represent the volume of concrete contained in the sidewalk. explain how you got your

67. ## math

FIND THE X INTERCEPTS OF THE GRAPH OF THE EQUATION pleaze explain thanks 1)Y=x to the second power+ 2x -8 2) Y=6X TO THE SECOND PoWER -x-12

68. ## writing/history

what's the difference in writing style between a history paper and an english paper? i use the same style for both classes and in english i get great grades and history not so much.

69. ## Science

Which side of the equation are the reactants and products on? Which side is energy in an exothermic reaction?

70. ## Physics

there's three parts, i keep getting these wrong please help. A set of crash tests consists of running a test car moving at a speed of 11.8 m/s (26.4 mi/hr) into a solid wall. Strapped securely in an advanced seat belt system, a 59.0 kg (130 lbs) dummy is

71. ## MATH

6(X+5-2)X+4)+3(X-5)

72. ## geography

how do i find countries with rank classes?

73. ## Chem Urgent!

How can I divide this answer Pb2(SO4)2 it needs to be simplified by 2)?

74. ## College Calculus

Could someone explain how to distinguish improper integrals in non-mathematical terms so I may understand? Thanks!

75. ## social studies

What architectural wonder was completed in 1648?

76. ## geography

I am trying to find this: how do we find the country's rank population such as upper class, lower class, and middle class?

77. ## math(relation & functions) need help urgently

Seeds of type A and type B are sold in a packet each must contain a)both type a and type b seeds b)at least twice the number of type b c)as there are type a seeds no more thanm 12 seeds 1)state the minimum number in each packet of type a and type b seeds.

78. ## English

Sound Words. The___ of broken glass followed the ____ of the bullet as the rifle____ .The soldiers were awakened by the _____ of the bugle.

79. ## homework

Distinguish among bias, prejudice, discrimination and bigotry as they relate to the issues of racial and ethnic controversies in our society.What possible solutions might social scientists suggest as a remedy for the problems related to these

80. ## English

Can you help me unscramble these words: largloi, osmoe, swarlu, clame, shero, estoroit,neomelach, and treeatan. There all animal names, thanks

I am supposed to write a quadratic equation using only the solutions and I am only given one solution:4. It can't be (x-4)=0. Can I use 0 to make (x-4)(x+0)=0?

82. ## Science

I have questions on the periodic table (I don't know anything about it) Where are the elements that don't react and that are highly reactive located. Where are the shiny and ductile elements located and where are the metals, non metals and metalloids

83. ## Math

What is the answer to 12 squared = x(x+6) ?

84. ## physics again...

A 62.0 kg diver falls from rest into a swimming pool from a height of 3.50 m. It takes 1.92 s for the diver to stop after entering the water. Find the magnitude of the average force exerted on the diver during that time.

85. ## math check my work

find theta in radians to the nearest tenth if: sec(theta) = 1.4231 is this correct: enter into calculator: cos^(-1)= 1/1.4231 get .7916232503, rounded to the nearest tenth = .8

86. ## English Grammar

1. Reading a message is convenient for him. 2. To read a message is convenient for him. 3. It is convenient for him to read a message. 4. It is convenient his reading a message. --------------------------- Are all the sentences above grammatical?

87. ## English expression

E-mail messages usually come in two parts: the heading and the body. -------------------------------- Why do you use 'in' in this sentence as in 'come in'? Does it have a special meaning?

88. ## Maths

Solve the problem. Assume that simple interest is being calculated. Round your answer to the nearest cent. Susie borrowed \$7500. from a bank for 18 months with interest of 5% per year. Find the total amount she repaid on the due date of the loan. (Use:

89. ## math

i need help with this question- a bag of chcolate candies has a nutrition label ststing that each seving contains 20% of the recommended daily amount of fat.A serving has 13 grams.using this informtaion what is the recommended daily value

90. ## Math (Vectors)

Show that x dot y = 1/2 ( |x + y^2| - |x|^2 - |y|^2 )

91. ## Chemistry- Stochiometry

The conversion factor for deriving the number of moles of salicylic acid, C7H6O3, from a given number of grams of salicylic acid is...

92. ## calculus - vectors

Show that x dot y = 1/2 ( |x + y^2| - |x|^2 - |y|^2 )

93. ## english

what would you do if the water ran out for 48h?

94. ## human services

Could someone explain to me the difference between a response that compares and contrasts intrinsic and extrinsic motivation. and also give an example of each.

95. ## communication

How can we be sure the officers interpretation of slang is accurate?

96. ## Prealgebra

Two times a number less 4 is greater than the same number plus 6. For what number or numbers is this true?

97. ## Prealgebra

One-half of the sum of a number and 4 is less than 14. What is the number?

98. ## Math

Find the rate 392ft/ 8 sec

99. ## math

Approximately 5 out of every 10 students at Kendra's college live on campus. The college has 5,000 students. How many of them live on campus? Set up a proportion.

100. ## math

how would you solve [(*square root*125)^4]^1/6

101. ## Math

Rewrite the statement, using percent notation. Of 50 houses in a development, 20 are sold.

102. ## science

below are about 21 questions from my final study guide. I was given a 563 question study guide for my final and obviously I did not understand every question. So basically I did not understand 4% of the questions which is pretty good. Just any help with

103. ## Math

Ratios- Please help The ratio of 5 3/5 to 2 1/10 The ratio of 7 dimes to 3 quarters Marc took 3 hours(h)to mow a lawn while Angelina took 150 minutes (min) to mow the same lawn a week earlier. Write the ratio of Marc's time to Angelina's time as a ratio of

104. ## math

How would you solve 3x times x squared = 4

105. ## Math

Describe an application for the use of ratios or proportions

106. ## physics

A moving 1.60 kg block collides with a horizontal spring whose spring constant is 295 N/m. The block compresses the spring a maximum distance of 3.50 cm from its rest position. The coefficient of kinetic friction between the block and the horizontal

107. ## trig

Graph one complete cycle of y + cos x cos pi over6 + sin x sin pi/6 by first rewriting the right side in the form cos(A-B)

108. ## trig

If tan(A+B) = 2 and tan B =1/3, find tan A

109. ## science

does the sun raise in the east and sets in the west. or is it the other way around?

110. ## trig

Prove the identity sin(3 pi /2 + x) + sin(3pi/2 -x) = -2cosx

111. ## trig

Graph the followiing function from x + 0 to x = 4 pi y = 3 cos squared x/2

112. ## trig

Prove the identity sin squared 0 with line/2 = csc zero with line -cot zero with a line /2csc zero with a line

113. ## trig

8 sin 9x cos3x Rewrite the xpression as a sum or differnce using one of the product sum formulas Simplify if possible

114. ## Jason

I understand that polymers are long chain 500-20,000 repeating units, but I don't know: what car components are made of polymers?

115. ## Math

Please help - Ratio word problem Marc took 3 hours(h)to mow a lawn while Angelina took 150 minutes (min) to mow the same lawn a week earlier. Write the ratio of Marc's time to Angelina's time as a ratio of whole numbers.

116. ## Math

Help me- Proportions A store has T-shirts on slae at 2 for \$5.50. At this rate, what do five T-shirts cost?

117. ## engineering physics 2

A 19 m long piece of wire of density 8.34 g/m3 has a diameter of 12.593 mm. The resistiv- ity of the wire is 1.7e-8(ohm)(m) at 20 degrees celsius. The temperature coefficient for the wire is 0.0038(degrees celsius)^-1. Calculate the resistance of the wire

118. ## WESTON C.I

DO YOU HAVE FAITH IN CANADA'S JUDICIAL?

119. ## chemistry

Is delta Tf = delta Tb? The original practice problem is Detla Tf= 8.631 for an aqueous solution, what is delta Tb. I know that Delta Tf=Kf*m

120. ## Chemistry

When two similar liquids mix to form a solution, the entropy of solution is expectted to be: a.negative b.zero c.positive d.negative at low T and positive at high T

121. ## french

what is the difference between le jardin and la terrasse?

122. ## chemistry

Consider an acid, HA, with pKa =3.33 0.025 moles of hydroxide ion are added to 17.4mL of a 0.519 M solution of the acid. What is the resulting pH? I know pKa=-log([Ka]) pH=-log([H+]) I don't know how to link this information. Thanks

123. ## Chem 2

What is the approximate value of the K for the neutralization of nitrous acid with ammonia? Ka for the acid is 0.00045 and Kb for the base is 0.000018. Do I multiply Ka*Kb?

124. ## For A Science/Biology teacher

Ectothermic organisms have body temperatures that vary with the temperature of their surroundings. Discuss the effect this variation might have on the functioning enzymes in these organisms. Suggest ways ectothermic organisms might cope with this problem.

125. ## Science

In a wheelbarrow, you have 2 kilograms of soil for your garden. If 8 percent of it is organic matter( decayed materials from organisms), how many grams of organic matter do you have?

126. ## Chemistry

how do i make 100ml of (0.01mol/L) KMnO4 out of 10.0ml(0.10mol/L)KMnO4

127. ## Chemistry

determine the approximate molarity of a solution of NaOH prepared by diluting 10ml of 6M NaOH to a volume of 400 ml. using the solution in the first part, 24.5ml of NaOH solution was required to neutralize 26.4ml of a .150M HCl solution. find the molarity

128. ## atomic energy

How can I share my school notes on the internet? Do you know of any web sites where a student can post his school notes? Love, Candy

129. ## Math

What is the lateral area, total area, and volume of a rectangular solid whose l=7, w=6, & h=2?

130. ## calculus

what is an upper bound on the absolute value of the error? the abs value of (the sum from n=1 to infinity of ((-1)^(n+1))/(n*5^n) where it is -.1826666....)

131. ## calculus

test the series for convergence or divergence. the sum from n=1 to infinity of ((-1)^n*e^n)/(n^3) I said it converges because the derivative of (1/n^3) is decreasing

132. ## United States

I need to know what the difference is between a commonwealth (Puerto Rico) and a territory (Guam) of the United States. If anyone could help, that would be great!

133. ## calculus

test the series for convergence or divergence using the alternating series test the sum from n=1 to infinity of (-1)^n/(3n+1) I said it converges, is this true?

134. ## math

Does anyone know how to clear the table on a TI-84 graphic calculator?

135. ## French

How would you say Radisson Home and Grill? This is due tommorrow and i need help

136. ## History

What u.s. president began the interstate Highway System?

137. ## math

Does anyone know what |-11| means?

138. ## Jack

how does cross linking alter the properties of a polymer?

139. ## science

why will deer travel for many miles to get a salt lick?

140. ## Chemistry

Determine the actual yield in grams of CCL4 if 175.0g of Cl2 reacts with meathane. The percentage yield of the reaction is 75.4%

141. ## Trig

Verify that each of the following is an identity. tan^2x-sin^2x=tan^2xsin^2x I can get it down to cos^2 on the right, but cannot get it to work out on the left. secx/cosx - tanx/cotx=1 On the left I got down to 1-tan^2, but that clearly doesn't equal 1....

142. ## physics

A Princeton prof. (mass = 67.0 kg), surprised by the large stopping force he calculates for jumping flat footed from a height of 0.11 m, decides to try the experiment. Calculate he deceleration (in g's) if he stops in a distance of 0.30 cm. (Do not try