# Questions Asked onFebruary 10, 2012

1. ## Trigonometry

If A + B + C = 180°, Prove that Cos²A + Cos²B + Cos²C = 1-2cosAcosBcosC

2. ## Chemistry

Consider an ideal gas encloesd in a 1.00 L container at an internal pressure of 10.0 atm. Calculate the work, w, if the gas expands against a constant external pressure of 1.00 atm to a final volume of 20.0 L. w = ____ J now calculate the work done if this

3. ## CHEM

At constant pressure, which of these systems do work on the surroundings? Check all that apply. 2A (g) + B(s) --> 3C(g) 2A (g) +2B (g) -->5C(g) A(g)+ B(g) --> C(g) A (s) +2B(g)--> C(g)

4. ## trigonometry

the bases of a trapezoid are 22 and 12 respectively. The angles at the extremities of one base are 65 degree and 40 degree respectively find the two legs. Answer using law of sines pls

5. ## economics

Suppose that there are three beachfront parcels of land available for sale in Asilomar and six people who would each like to purchase one parcel. Assume that the parcels are essentially identical and that the minimum selling price of each is \$600,000. The

6. ## Chemistry

A researcher studying the nutritional value of a new candy places a 4.90 gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.75 Celsius. If the heat capacity of the calorimeter is

7. ## Physics

Find the maximum height reached by a ball thrown upward at a velocity of 95ft/s

8. ## Organic Chemistry

How do I write a balanced equation for the synthesis of benzoic acid using the grignard reagent. To make the grignard reagent I used 0.5g of Mg, 2 ml of ether, and 3.9g of bromobenze. then to make the benzoic acid I used CO2 and H3O+. I will really

9. ## physics

A wooden cube of side 10cm has mass 700g.What part of it remains above the water surface while floating?

10. ## Chemistry

If the heat from burning 5.800 g of C6H6 is added to 5691 g of water at 21 °C, what is the final temperature of the water? 2C6H6(l) +15O2 (g)----> 12CO2(g)+6H2O(l) +6542

11. ## PHYSICS

The density of ice is 0.92g cm-3 & that of sea water is 1.025g cm-3.Find the total volume of an iceberg which floats with its volume 800cm3 above water? ANSWER:7809.5cm3

12. ## physics

A kid fires water horizontally from a squirt gun held 1.6 above the ground. It hits another kid 2.1 away square in the back, at a point 0.91 above the ground.

13. ## physics

A point charge of +4.6 micro-coulombs lies at x = 0 and a point charge of -7.3 micro-coulombs lies at x = +3.3 m. Where on the x axis, is the total electric potential equal to zero? Answer in meters.

14. ## Chemistry

In a constant-pressure calorimeter, 50.0 mL of 0.300 M Ba(OH)2 was added to 50.0 mL of 0.600 M HCl. The reaction caused the temperature of the solution to rise from 24.50 degrees C to 28.59 degrees C. If the solution has the same density and specific heat

15. ## physics

A bowling ball (mass = 7.2 kg, radius = 0.12 m) and a billiard ball (mass = 0.31 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other?

16. ## chemistry

When a certain amount of MgF2 is added to water, the freezing point lowers by 3.5 oC. What was the molality of the magnesium fluoride? (Kf for water = 1.86 oC/m)

17. ## Calculus 2

Find c>0 such that the area of the region enclosed by the parabolas y=x^2−c^2 and y=c^2−x^2 is 90.

18. ## College Algebra

Solve the problem. Jon has 1162 points in his math class. He must have 86% of the 1500 points possible by the end of the term to receive credit for the class. What is the minimum number of additional points he must earn by the end of the term to receive

19. ## Science

A block of metal weighing 2kg is resting on a frictionless plane. It is struck by a jet releasing water at the rate of 1kg/s and at a speed of 5m/s. Find the initial acceleration of the block.

20. ## government

Which institution developed outside the limits of the written Constitution of the United States?

21. ## PHYSICS

The density of ice is 0.92 g cm-3 & that of sea water is 1.025 g cm-3.Find total volume of an iceberg which floats with its volume 800 cm3 above water. ANSWER:7809.5 cm3

22. ## math

In Exam Figure 7, AA′ = 33 m and BC =7.5 m. The span is divided into six equal parts at E, G, C, I, and K. Find the length of A′B. Round your answer to two decimal places.

23. ## algebra 1

Delilah buys an \$18,000 car for her catering business. The equation below shows her earnings after each catering event, where x represents the number of hours worked. y=18x 150 If each event is approximately 5 hours long, about how many events must Delilah

24. ## Chemistry

2C6H6(l) + 15O2(g) -> 12CO2(g) + 6H2O(l) + 6542 kJ If the heat from burning 7.000 g of C6H6 is added to 5691 g of water at 21 degrees C what is the final temperature of the water?

25. ## ORGANIG CHEMISTRY

SUPPOSE .1g OF A AND 1.0ml WATER WERE MIXED AND HEATED TO 80 DEGREE CELCEOUS.WOULD ALL THE SOLID DISOLVED.AND IF THE SOLUTION IS COOLED AT WHAT TEMPARATURE CRYSTALS WILL APPEAR.

26. ## Physics

A 210W heater is placed in 2KG of water. What temperature rise is produced if the heater is switched on for 200 seconds?

27. ## physics

Suppose all the people of the Earth go to the North Pole and, on a signal, all jump straight up. Estimate the recoil speed of the Earth. The mass of the Earth is 6 1024 kg, and there are about 6 billion people (6 109). Take the average mass of a person to

28. ## chemistry

Write net ionic equation for the reaction between nitric acid and calcium hydroxide.

29. ## ENGLISH

Unscramble the letters: N A N Qu I I R A B I N S O U I O TO MAKE THE BIGGEST WORD

30. ## Algebra

State the slope of the lines: a, b, c: a) Y + 8 = x Slope is: b) Y - 8 = 0 Slope is: c) x – 8 = 0 Slope is: PLEASE HELP ASAP

31. ## Calculus

Find the derivative of y = 3x+2/x+1

32. ## Science

During a football match, the ball shot towards the goal struck the defender's foot at the speed of 10m/s and it bounced back at 20m/s. If the time of impact was 0.2 sec, and mass of the ball 0.5 kg,then find the average force exerted by defender on the

33. ## Calculus

The area of a floating circular oil spill in the ocean is increasing at a rate of 96pi square meters per second. When the area of the spill is 1000pi how fast is the radius increasing in meters per second.

34. ## Calc 2

Find c>0 such that the area of the region enclosed by the parabolas y=x^2−c^2 and y=c^2−x^2 is 90.

35. ## Science

According to Peter Saundry, there is no true universal code of ethics because standards of conduct vary from place-to-place and time-to-time

36. ## physics

A point charge of +10 micro-coulombs lies at x = -0.39 m, y = 0 m, a point charge of -5.7 micro-coulombs lies at x = +0.39 m, y = 0 m, and a point charge of +14.9 micro-coulombs lies at x = 0 m, y = -0.3 m. A point charge of +10 micro-coulombs is moves

37. ## math

This week’s focus is on systems of equations. Describe a profession that might use this on a regular basis, and give an example with a solution (not covered in the text) of a math problem with a real-life application.

38. ## math

In the 17th century, there were more than 800,000 inhabitants of Paris. At the time, it was believed that no one had more than 200,000 hairs on their head. Assuming these numbers are correct and that everyone has at least 1 hair on their head, show that

39. ## Physics

A rocket of mass 4.5 e5 kg is in flight. Its thrust is directed at an angle of 58.5° above the horizontal and has a magnitude of 7.50e6 N. Find the magnitude and direction of the rockets acceleration. Give the direction as an angle above the horizonal.

40. ## Chemistry

If water is synthesized how much hydrogen would be needed to make 10.0 grams?

4x+3y=12

4x+3y=12

43. ## Calculus (Antiderivatives)

What is the antiderivative of? (x^2 - 4) / (x - 2)

44. ## Tourism

why is it important that the sport industry and the tourism industry have a good relationship? And what is the relationship between them?

45. ## chm

An unknown radioactive substance has a half-life of 3.20 . If 34.8 of the substance is currently present, what mass was present 8.00 hours ago?

46. ## trig

I don't understand this. can you please tell how you got each answer? describe how the graph of each function is related to a basic trigonometric graph. 1. y= 1/2cos x 2. y= 2cos x+1 3. y= sin x-4 4. y= sin(x-4) 5. y= sin(3x) 6. y= cos(1/2x) 7. y= -cos x

47. ## Trigonometry

If A + B + C = 180°, Prove that Cos²A + Cos²B - Cos²C = 1 – 2sinAsinBcosC

48. ## Trigonometry

If A + B + C = 180°, Prove that Sin² (A/2) + sin² (B/2) - sin²(C/2) = 1 – 2cos (A/2) cos (B/2) sin(C/2)

49. ## math

using this information: if an object is thrown straight up into the air from the height H feet per second then at time tseconds the height of the object is -16.1t^2 +Vt+ H feet. This formula uses only gravitational force, ignoring air friction. It is valid

50. ## chemistry

116 g of isopropanol, formula C3H8O, contains how many moles?

51. ## algebra

Cut a piece of paper to form a triangle shape. Tear off the three corners of the triangle. Then put the three corners together. Describe what you see. What mathematical truth does this activity illustrate? Explain

52. ## CHEM

If the heat from burning 5.800 g of C6H6 is added to 5691 g of water at 21 °C, what is the final temperature of the water? 2C6H6(l) +15O2 (g)----> 12CO2(g)+6H2O(l) +6542

53. ## statistics

SAT I scores around the nation tend to have a mean scale score around 500, a standard deviation of about 100 points, and are approximately normally distributed. What SAT I score within the population would have a percentile rank of approximately 99?

54. ## CHEM

In a constant-pressure calorimeter, 60.0 mL of 0.340 M Ba(OH)2 was added to 60.0 mL of 0.680 M HCl. The reaction caused the temperature of the solution to rise from 24.07 °C to 28.70 °C. If the solution has the same density and specific heat as water,

55. ## ORGANIC CHEMISTRY

WHAT ARE THE DEFINITION OF DRYING AGENT;DELIQUSCENT SUBSTANCES;HYGROSCOPIC SUBSTANCES;EFFLORESCENT SUBSTANCES.

56. ## ENGINEERING

100 lb of loose gravel can fill a 1-ft^3 box. Its specific gravity is 2.68. What is the dry rodded weight? Find the volume of voids in the preceding problem.

57. ## Analytic geometry

Write in general form, the equation of the straight line that passes through the points A(-6, -1) and B(2,2)

58. ## MATH

n a right triangle ABC, C = 90°, A = 41° and c = 67 cm. Find b. (Round your answer to the nearest whole number.) b =

59. ## trig

If theta is an angle in standard position, state in what quadrants its terminal side can lie if theta is equal to -415 degrees?

60. ## ORGANIC CHEMISTRY

NAME THE PROCESSES OR TECHNIQUES IN THE FOLLOWING. 1.SEPARATION OF A SOLID FROM A SOLUTION 2.WHEN WATER IS COLD TO FORM ICE 3.WHEN WATER IS BOIL TO FORM VAPOR 4.WHEN IODINE IS HEATED DIRECTLY TO FORM GAS WITHOUT BEING LIQUID 5.WHEN STEAM IS COLD TO FORM

61. ## earth

An object on earth weighs 6 times what it would weigh on the moon. An object weighs 72 pounds on earth. Write multiplication equation to find the weight of object on moon.

62. ## Algebra 1

A line passes through (4,2) and is parallel to the graph of x= -3. What equation represents the line in slope-intercept form? It doesn't give me enough information to turn it into slope-intercept form. HELP ME PLEASE!!??!!

63. ## marketing

For each of the following statements, identify the type of market it describes. Use an example from the readings or the internet for each characteristic and explain your choice. A. The company practices product differentiation B. The firm earns an economic

64. ## English

Writeacher, I wanted to thank you for all what you have done for me and for my professional growth. We have worked really hard on the project over the last few days (though I was in bed with flu!) By the way, I used your suggestion as a title for the whole

65. ## try this

what song is this from: Everybody seems to look at you, Its not because your different, its just because your so scay cool, the sinister style---------------, you dropped it gorgeous, dropped it gorgeous, that's where the cool kids rule!

66. ## Physics

What are the three factors on which thermal energy depends?

67. ## physics

Betty Bodycheck (mB = 50 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 45.2 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a direction

68. ## Chemistry

A student mixes 45.0 ml of .150 M HCL with 30.0 ml of .200 M NaOH. What is the pH of the resulting solution?

69. ## Physics

An aluminum wire of diameter 2.47 mm carries a current of 12.9 A. How long on average does it take an electron to move 10.5 m along the wire? Assume 3.50 conduction electrons per aluminum atom. The mass density of aluminum is 2.70 g/cm3 and its atomic mass

70. ## Biology

Give diffferences/contrast between a Marine environment and an estuarine environment.

71. ## ramirez

A box slides down a 37° ramp with an acceleration of 1.24 m/s2. Determine the coefficient of kinetic friction between the box and the ramp.

72. ## physics

The windshield of a speeding car hits a hovering insect. Consider the time interval from just before the car hits the insect to just after the impact. Which of the following are correct? (Select all that apply.) Choose the system so that the change of

73. ## calculus

when does vector (a+b) = (a-b) mean? explain

74. ## Algebra

Show work to change the linear equation below to slope-intercept form and then, list the slope and y intercept coordinate for the: (leave answers as an integer or a fraction in improper form). 20+3x-8y=0

75. ## Calculus

Find the derivative, with respect to x of y = 7x^2 + 3x + 2

76. ## Psychology101

As a consumer of mental health services, which type of therapy would you prefer if you did not like to talk about your problems? If you were suffering from a phobia? If you had recurring nightmares since childhood? If you wanted to improve your marriage?

77. ## Physics

Wheel A of radius ra = 13.9 cm is coupled by belt B to wheel C of radius rc = 34.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 5.7 rad/s2. At what time will wheel C reach a rotational speed of 168.2 rev/min,

78. ## CHEM

I know I posted this question again but no one is really helping me. Can someone please help me as soon as possible. In a constant-pressure calorimeter, 60.0 mL of 0.340 M Ba(OH)2 was added to 60.0 mL of 0.680 M HCl. The reaction caused the temperature of

79. ## Chem

DrBob222, I got an answer of 33 and 24.23 as the temperature but it is incorrect. I looked at your response to David and unfortunately it did not help me. Would you please take a look at this question and help me out. Thanks. If the heat from burning 5.800

80. ## physics

A softball pitcher throws a ball by swinging his arm with an angular speed of 9.81 rad/s. If the pitchers arm is 0.640 m long, what is the tangential speed of the ball just before the pitcher releases it?

81. ## Physics

Wheel A of radius ra = 13.9 cm is coupled by belt B to wheel C of radius rc = 34.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 5.7 rad/s2. At what time will wheel C reach a rotational speed of 168.2 rev/min,

82. ## physics

A coil of wire of cross-section 0.75 square mm weighs 125g in air and 115g in water. What will be the length of the coil?

83. ## new american gov't 2

The term, _____ , refers to the potential benefit a person gives up when he or she decides to do one thing instead of another.

84. ## physics

a runner who has a mass of 52 g , has a momentum of 218 kg/m/s along a trail. what is the runners velocity?

85. ## Chemistry

In a constant-pressure calorimeter, 60.0 mL of 0.330 M Ba(OH)2 was added to 60.0 mL of 0.660 M HCl. The reaction caused the temperature of the solution to rise from 21.71 °C to 26.21 °C. If the solution has the same density and specific heat as water,

86. ## Calculus

when does vector (a+b) = (a-b)? explain

87. ## Calculus

Find the positive value of x where fx=x3+2x1/3 has a horizontal tangent line. Answer =

88. ## Math

Determine the values of x for which the function f(x) = 3/(√x^2+3x-4) is continuous.

1) In comparing the phase diagram for water with that of a solution of sugar in water, all of the following decrease except a) the vapor pressure b) the boiling point c) the freezing point d) the triple point I chose the boiling point as the answer. Is

1)For electrolyte solutions, the _____ the concentration of the electrolyte and the ____ the ion charges, then the ____ the ion-pairing. a) lower, smaller, greater b) higher, smaller, smaller c) higher, greater, greater d) lower, greater, smaller e) lower,

91. ## Calculus

Examine the continuity of the function h(x)=[-x, if x0 I don't understand this question...

92. ## Chem

Which of the following statements is part of the kinetic theory? The particles of a gas move independently of each other. The particles in a gas move rapidly. The particles in a gas are relatively far apart. all of the above

93. ## math. can someone explain this!

using this information: if an object is thrown straight up into the air from the height H feet per second then at time tseconds the height of the object is -16.1t^2 +Vt+ H feet. This formula uses only gravitational force, ignoring air friction. It is valid

1) The molecular mass of a substance was determined by the freezing point depression technique. The minimum data required for the determination are: a) delta T and Kf only b) delta T, Kf, and mass of solute c) delta T, Kf, mass of solute, and mass of

95. ## Calculus

If 2x^3 + 2xy - y^2 = 6, then approximate the equation of the tangent line at point x = 1.44

96. ## math

in a right triangle ABC, C = 90°, a = 33.6 inches and b = 28.4 inches. Find B. Write your answer in decimal degrees (Round your answer to one decimal place.) B =

97. ## Calculus

Find the domain of f(x) = (square root (x^2 - 16))/(x + 2)

98. ## finance

The target capital structure for QM industries is 39% common stock, 9% preferred stock and 52% debt. If the cost of common equity for the firm is 18.8%, the cost of preferred stock is 9.7%, the before tax cost of debt is 8.6%, and the firm 's tax rate is

99. ## chemistry

how many seconds would it take to go from 0mi/h to 60 mi/h with an average acceleration of 15mi/h squared

100. ## Human Services

I have a problem with APA formatting and how to cite Example 1 According to McNamara, n.d The Question---my answer Or do I need to cite each question The amount of questions are about 100

101. ## physics

A rock of mass 44 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 258 N. What is the magnitude of the acceleration of the rock?

102. ## math

how can i make the target number 670,just by using the following digits. 6,9,6,5,9,50

103. ## physics

An infinite sheet with a negative surface charge density runs parallel to the x axis. Another infinite sheet with an equal but opposite sign surface charge runs parallel to the y axis. The difference in electric potential from the point x = +5.2 m, y =

104. ## MATH

Angle C and Angle D are vertical angles. The conclusion is that angle C and angle D are complementary. Which is a counterexample of this conclusion. * 2 vertical angles which are not complementary or * 2 complementary angles which are not vertical

105. ## Physics

What would the equation be for this problem: A bicyclist accelerates at 0.89 m/s/s during a 5 s interval. What is the change in the speed of the bicycle and bicyclist?

7809.5 cm3

107. ## Math

We are currently studying "earning money" for math. I read this sentence: When a store claculates its profit as a percentage of its cost price the profit is always bigger than the profit calculated as a percentage of the selling price. What does it mean

108. ## Physics

the decibel level of a person talking in a room is 65.0 dB relative to the threshold of hearing determine the decibel level if 6 people talk in the room each at this level

109. ## English Home Language

Can You Please Give Me Points as To How to add persuasive points to my speech " Women Should Rule The Way" I Already said they more Patient and better communcaters

110. ## chemistry

if 1.2x10^24 molecules of water freeze how much energy is released by the water according to the equation below? - H2O(l)-> H2O(s);ΔH=-6KJ

111. ## physics

A toy train is pushed forward and released at = 4.0 with a speed of 1.5 . It rolls at a steady speed for 2.6 , then one wheel begins to stick. The train comes to a stop 5.2 from the point at which it was released.

112. ## biology

1. explain that not all cell genes show simple patterns of dominant and recessive alleles. 2. explain how to identify th blood types of an offspring. 3. discuss how gender in humans is determined.

113. ## math

divide eight pounds of sand into twelve equal containers. how much in each container?

114. ## Chemistry

At constant pressure, which of these systems do work on the surroundings? Check all that apply. 2A (g) + B(s) --> 3C(g) 2A (g) +2B (g) -->5C(g) A(g)+ B(g) --> C(g) A (s) +2B(g)--> C(g)

115. ## Trigonometry

If A + B + C = 180°, Prove that Sin² (A/2) + sin² (B/2) + sin²(C/2) = 1 – 2sin (A/2) sin (B/2) sin(C/2)

116. ## physics

A rock of mass 32 kg accidentally breaks loose from the edge of a cliff and falls straight down. The magnitude of the air resistance that opposes its downward motion is 275 N. What is the magnitude of the acceleration of the rock?

117. ## algebra

A student wrote – 3 > x > 5 as the inequality that represents the real numbers less than – 3 or greater than 5. Explain why this is incorrect.

118. ## algebra

samuel is 5/8 inch taller than jackie. shelley is o.7 inch taller than jackie. craig is inch taller than jackie. who is taller?

119. ## algebra

The apothem of a regular polygon is the distance from the center of the polygon to a side. Explain how to derive a formula for the area of a regular polygon using the apothem.

120. ## algebra

Explain how you find ordered-pair solutions of the equation 3x – 5y = 15, and then find two such solutions.

121. ## English

I left out the last interview. I need to summarize the interview in a few sentences rephrasing the colloquial expressions I'm not sure of. Could you please help me here, too? Thank you. "This isn't always easy but if you know before the interview, it's

122. ## calculus

Let f(x) be the function 1/x+5. Then the quotient f(6+h)−f(6)/h can be simplified to −1/ah+b for: a= 11 b= I did all the work to get a but for some reason the number that I keep getting for "B" is wrong

123. ## math

In a right triangle ABC, C = 90°, b = 380.1 inches and c = 589.1 inches. Solve for all the missing parts using the given information. (Round each answer to one decimal place for side and to two decimal places for angles.) A = ° B = ° a = __inches IM

124. ## Mathematics

Last year Jim's gross weekly pay was \$920 and he received \$520 in bank interest. HIs taxation deductions totalled \$1370. a) Calculate Jim's gross income for last year. b) How much was Jim's taxable income? c) Jim's Medicare levy was 1.5% of his taxable

125. ## Math

The Oliver Company plans to market a new product. Based on its market studies, Oliver estimates that it can sell up to 2,000 units in 2005. The selling price will be \$5 per unit. Variable costs are estimated to be 20% of total revenue. Fixed costs are

126. ## us history

hey, i am trying to do my history review sheet and i can't seem to find #2 the question is: "What was the result of interchangeable parts and mass production?" can someone plz help me!!!!!!!!! THANK YOU SO MUCH!

127. ## Chemistry

what is the concentration of hcl when 55 ml of this hcl solution neutralize 15ml of .9m ca(oh)2

128. ## Calculus

Integrate the following (x^5 - 2)dx

129. ## physics

What does it mean when they say that action equals reaction?

130. ## ms. sue

ms. sue u please be able to give me title for essay on love. i not want to call it plain true love.

131. ## Maths

Dots are arranged to form pattern as show below: pattern 1 they are 2 pattern 2 they are 5 pattern 3 (a) how many dots are in the 4th, 5th, 11th, 200th patterns?

132. ## math

The plane is at least 500 miles closer to chicago than to denver

133. ## statistics

What probability value should be used for determining whether the modified process results in a defect rate that is less than 6%. I got part a and b of the question but I am completely lost on what this is asking me. Can anyone help?!?

134. ## Chemistry

Molar volume of an ideal gas at S.A.T.P. (25oC and 1.00 bar is 24.8 dm3 mol-1. Assume that gases are at 225oC and P=1.00 atmosphere before and after the combustion and behave as ideal gases. The chemical equation for the combustion of butane is: 2C4H10(g)

1. The appearance of a document can do all of the following EXCEPT: a.establish rapport with the audience. b. guide your readers' attention. c.substitute for the written text in the document.(*) d. build goodwill. 2. The design of a document reflects on

136. ## Language Arts

I need help. I cannot figure out the anologies. They are... Colloquy:Loquacious:: Somnambulism:ambulatory Plateau: flat octahedron:eight toponym: noun Thanks

137. ## physics

An infinite sheet with a surface charge density of -2.1 micro-coulombs/m2 runs parallel to the x axis. Another infinite sheet a surface charge density of +2.1 micro-coulombs/m2 runs parallel to the y axis. A charge of -4.1 micro-coulombs moves at a 45

138. ## Physics

A silver wire and a platinum wire of the same length have the same resistance. What is the ratio of the diameter of the silver wire to that of the platinum wire. I did 10.6E-8/1.59E-8 but am not getting correct answer?

139. ## Education

how much influence do you believe the government should have in deciding what is or is not being taught?

140. ## DANCE :D

ok, i am in a dance team called Gingham Girls, and my director told me i need to stretch more on my left for my left splits. but i can't seem to get them and its hard for me to stretch on my left! and ideas? i already have my right splits! THANKS EVERYONE

141. ## algebra

Find the slope of the line containing the pair of points (7,5) and (8,-3)

142. ## For Henry2 - English

http://www.jiskha.com/display.cgi?id=1328824198 Or have you already taken care of this?

143. ## ms. sue

ms. sue i need help with one sentence in love story i be writing about. i write the sentence: if personalities don't match, and the characters are opposite, then each will follow different directions which will cause a split in the relationship. my friend

144. ## English

Marion needs to believe in a ____ ?

145. ## Algebra

during the first part of a canoe trip the canoe travels 71 miles at a certain speed. The canoe travels 7 miles on the second part of the trip at a speed 5mph slower. The total time of the trip is 3 hours. what are the speed in each part of the trip?

146. ## Chemistry

Suppose MgSe(a=545 pm) and SrSe (a=623 pm) both crystallize with a NaCl (rock salt) structure. Calculate the ionic radius of Sr2+ (Hint:Assume that the Se2- ions actually touch in MgSe.)

147. ## English - Native speakers

Please paraphrase the phrase into a bit simpler English involving arrested development of engorged stages or of eggs.

148. ## physics

Two boxes (b1 = 23 kg and b2 = 57 kg) are being pushed across a horizontal frictionless surface, as the drawing shows. The 48-N pushing force is horizontal and is applied to the 23-kg box, which in turn pushes against the 57-kg box. Find the magnitude of

149. ## physics

If the magnitude of the electric field in air exceeds roughly 3 106 N/C, the air breaks down and a spark forms. For a two-disk capacitor of radius 49 cm with a gap of 1 mm, what is the maximum charge (plus and minus) that can be placed on the disks without

150. ## chemistry

Arrange the following three water solutions according to decreasing osmotic pressure

151. ## chemistry

What would happen if chlorine water was added to an aqueous solution of sodium chloride?

152. ## Math Log #3

a vertical translation of f(x)=e^x changes its asymptote? Sometimes, always or never??

153. ## math

using this information: if an object is thrown straight up into the air from the height H feet per second then at time tseconds the height of the object is -16.1t^2 +Vt+ H feet. This formula uses only gravitational force, ignoring air friction. It is valid

154. ## fullerton

A vertical container with base area measuring 12 cm by 18 cm is being filled with identical pieces of candy, each with a volume of 50.0 mm3 and a mass of 0.0200 g. Assume that the volume of the empty spaces between the candies is negligible. If the height

155. ## physics

The flywheel of a steam engine begins to rotate from rest with a constant angular acceleration of 1.41 rad/s2. It accelerates for 25.5 s, then maintains a constant angular velocity. Calculate the total angle through which the wheel has turned 65.5 s after

156. ## EXP 105

I need help on how to write a practical context paragraph

157. ## Chemistry

What would happen if MnO2 was mixed with KBrO3 ND 9 M sulfuric acid?

158. ## math for elem. teacher

Explain why the product of any two consecutive natural numbers is even.

159. ## Chemistry

Suppose you have a supply of the following metals: Fe, Ni,Sc, Cr, Au, K. Which of there could be mixed to make substitutional alloys? Which metals are incompatible for this purpose. Clearly explain why there metals would be incompatible. I am unsure about

160. ## geometry

true or false Given:

161. ## English

Could you please check this sentence? As I haven't heard from you, I'll email the module, you sent to me this morning, to my secretary's office myself(without making ANY CHANGES AT ALL)

162. ## Science

In a rocket, fuel burns at the rate of 1kg/s. This fuel is Ejected from the rocket with a velocity of 60km/s. What force will be exerted on the rocket?

163. ## Math

Find the volume of the solid generated by revolving the region bounded by y= 5 cosh (x) and y= 5 sinh (x) between x = 0 and x = 1 about the x-axis

164. ## accounting

competitor companies that are U.S. GAAP publicly traded companies.

165. ## accounting

Research/Ratio Assignment:Choose two competitor companies that are U.S. GAAP publicly traded companies. Determine and compare their net profit margin and debt to asset ratio for the most recent year reported. Interpret the information and support your

166. ## Statistics

A box contains four balls labeled 1,2,3,4 respectively. Two balls will be sequentially selected from the box at random without replacement. Let Y1 be the maximum of two outcomes and Y2 be the minimum of two outcomes observed. Find the joint probability

167. ## physics

Betty Bodycheck (mB = 50.2 kg, vB = 22.0 km/h in the positive x-direction) and Sally Slasher (mS = 45.2 kg, vS = 28.0 km/h in the positive y-direction) are both racing to get to a hockey puck. Immediately after the collision, Betty is heading in a

168. ## Literature

The best kind are but shadows is

169. ## spanish

What does this mean? El tan Hermosillo question pienso en to todos Los dias

170. ## Physics

How long does it take a motor cyclist to come to rest?which travels at 12m/s decelerates at 3m/s^2

171. ## math

How do u solve 1/2 times 9.8 times 4 exponent 2

172. ## Chemistry

Which aqueous solution below is expected to have the lowest freezing point? Assume 100% dissociation for ionic species. 1)0.25m MgBr2 2)0.30m Na2SO4 3) 0.50m KCl 4) 1.0m sucrose 5) 0.40m Cr(NO3)3 I think that the answer is 0.30NaSO4 but I am not positive.

174. ## physics

When a wheel of radius R rotates about a fixed axis, do all points on the wheel have 1) The same angular velocity? Explain. 2) The same linear velocity? Explain. If the angular velocity is constant, 3) describe the linear velocities and accelerations

175. ## algebra 2

Which equation correctly shows d = xyz solved for z?

176. ## algebra 2

Petra needs to find the equation of a line through (–2, 3) that is parallel to the line represented by y = 2x– 4. Which equation best represents Petra's equation?

1) If exactly 100.0 grams of NaCl (mm=58.44g/mol) are dissolved in 300 grams of water (mm=18.02g/mol), the mole fraction of NaCl is? a) 1.71 b) 0.0932 c) 0.250 d) 0.103 e) 4.75 I did 100g / 100g + 300g = 100/40 = 0.250. Did I do this correctly?

178. ## Geometery

In a rhombus, m1 = 18x, m2 = x + y, and m3 = 30z. Find the value of the variables x,y, and z. .

179. ## Chemistry

Calculate pH when 0.060 mols of HCl are added to 1.000 L of a buffer containing 0.499M KH2PO4 and 0.193M K2HPO4

180. ## Calculus

If y = (ln(x-2))/(3e^x, then dy/dx =

181. ## Calculus

If f(x) = (square root of (3x^2 - 5x + 7)), then f'(2) =

182. ## TRIG

In a right triangle ABC, C = 90°, b = 380.1 inches and c = 589.1 inches. Solve for all the missing parts using the given information. (Round each answer to one decimal place for side and to two decimal places for angles.) A = ° B = ° a = inches IM lOST!

183. ## Calculus

What is the state of the function f at x = 2? F(x) = [x^3 for x < 2; 5x - 2 for x > or = to 2] ?continuous or differentiable both or neither one or the other?

184. ## PHYSICS

A wooden cube of side10cm has 700g.What part of it remains above the water surface while floating om water?

185. ## English

I need to rephrase (using indirect speech) what 4 people said is important when preparing to go for an interview. Could you please help me? 1)Speaker 1 recommends one should make a short list of the job’s requirement (or requirement for/in the job

186. ## physics

A conducting spherical shell with a total charge of +12.6 micro-coulombs has a point charge of -3.6 micro-coulombs placed at its center. The negative point charge will push the electrons in the spherical shell away from it. This will leave the inner shell

187. ## English

Here is interview 4. Could you please help me rephrase it, especially the part with (??) which I can't understand. 5)Speaker 4 is again very colloquial. “I’ve had quite a few interviews for, let’s see, about 4 jobs. So I was getting a bit blasé

188. ## math

determine the domain of the real valued function f(x) = sqrt(5 - (sqrt5))