# Questions Asked onMarch 21, 2011

1. ## Math 102

A bag contains six marbles, of which four are red and two are blue. Suppose two marbles are chosen at random and X represents the number of red marbles in the sample. Looking for the expected value of X.

2. ## Finance

A firm has forecasted sales of \$3,000 in April, \$4,500 in May and \$6,500 in June. All sales are on credit. 30% is collected the month of sale and the remainder the following month. What will be the balance in accounts receivable at the beginning of July

3. ## Chemistry

how is bumping avoided in the preparation of a hot water bath

4. ## Finance

Your grandparents deposit \$1,000 each year on your birthday, starting the day you are born, in an account that pays 6% interest compounded annually. How much will you have in the account on your 30th birthday, just after your grandparents make their

5. ## chemistry

The ΔH for the solution process when solid sodium hydroxide dissolves in water is 44.4 kJ/mol. When a 13.9 g sample of NaOH dissolves in 250.0 g of water in a coffee-cup calorimeter, the temperature increases from 23.0°C to ________°C. Assume that the

6. ## Math

A student earned scores of 85, 83, 90, 94, 88 and 84 on the first six tests in a biology class. What score is needed on the seventh test to produce an 86 average?

7. ## physics

A flywheel with a diameter of 1 m is initially at rest. Its angular acceleration versus time is graphed in the figure. (a) What is the angular separation between the initial position of a fixed point on the rim of the flywheel and the point's position 8 s

8. ## math !!!! :O

Amanda is 12 years old. She is 2/7 times as old as her father. How many years ago was her father 4 times as old as Amanda.

9. ## physics

A racing dog is initially running at 20.0 m/s, but is slowing down. Question: How fast is the dog moving when its kinetic energy has been reduced by half? Question: By what fraction has its kinetic energy been reduced when its speed has been reduced by

10. ## physics

an object is observed to fall from a bridge, striking the water below 3.03s ...with what velocitydid it strike the water?what was the average velocity during the fall?how high is the bridge?

11. ## Accounting

E3-5 Drew Carey Company has the following balances in selected accounts on December 31,2008. Accounts Receivable \$ -0- Accumulated Depreciation—Equipment -0- Equipment 7,000 Interest Payable -0- Notes Payable 10,000 Prepaid Insurance 2,100 Salaries

12. ## HCS/341

Can anyone explain this to me? im not understanding and ive been looking fo a while for info and i need help its due today Examination of the effect of legal, safety, and regulatory requirements on human resource process. • Explanation of why the student

13. ## Integrated Physics and Chemistry

A 5.0-gram sample of gold and a 5.0-gram sample of iron both absorb exactly 25 calories of energy. The specific heat of gold is 0.03 cal/g°C. The specific heat of iron is 0.11 cal/g°C. Which of the following statements is true? A) The gold sample will

14. ## Physics

A spacecraft in the shape of a long cylinder has a length of 100 m, and its mass with occupants is 1770 kg. It has strayed too close to a black hole having a mass 109 times that of the Sun. The nose of the spacecraft points toward the black hole, and the

15. ## High School Chemistry

10mL of 0.10M HCl is given. What is the pH? How many milliliters of 0.10M NaOH would be required to neutralize it? What is the pH of the neutralized solution? What would the pH of the solution be if you added 20mL of NaOH? Here's what I have so far: pH of

16. ## chemistry

A gas mixture, has a total pressure of 300. Torr and consists of equal masses of Ne and Ar. What is the partial pressure of Ar, in Torr?

17. ## Math

Which expression is equivalent to -5(n-9) ?

18. ## psychology 101

List and compare Kohlberg’s 6 stages of moral development and Piaget’s theory of moral development.

19. ## math

the edges of 3 cubes are consecutive odd intergers. if the cubes aer stacked on a desk as shown, the total exposed surface area is 381. find the lenths of the sides of the cubes thanks!!

20. ## Chemistry

If 3.2 moles of NaCl are dissolved in enough water to make a 0.98-liter solution, what is the molarity of the solution?

21. ## math

In each of two different fourth-grade classes, 1/3 of the members are girls, Does each class have the same number of girls.

22. ## Integrated Physics and Chemistry

Which of the following forms of energy transfer can occur in a vacuum? A) conduction B) convection C) radiation D) all of the above Can I get some help on this one too, please?

23. ## Statisics

transportation officials tell us that 80% of drivers wear seat belt while driving. Find the probability that more then 567 drivers in a sample of 700 drivers wear seat belts

24. ## Ms. Sue

Ms. Sue Im going to do a biography on a well known person from Victorian era. Or anything like that. Like the first chapter was Colonies in the wildnerness, and then the second chapter was Building a nation. Im trying to look for a well known famous person

25. ## physics

A 290 kg piano slides 4.0 m down a 30° incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (Fig. 6-36). The effective coefficient of kinetic friction is 0.40

26. ## Chemistry

OOPs i Meant How many grams CaCo3will dissolve on 3.0*10^2mL of 0.050 M Ca(NO3)2? Ksp=8.7*10^-9

27. ## Physics

The side of a fish tank is made up of a thick parallel sided piece of glass.The refractive index for glass is 1.52.A beam of light strikes the surface of the glass at an angle of 46 degrees with rspect to the normal.What direction will the beam move in the

28. ## History

Why was it so difficult for Great Britain to control the New England colonies?

29. ## Math

Herman Company has three products in its ending inventory. Specific per unit data for each of the products are as follows: Required: What unit values should Herman use for each of its products when applying the LCM rule to ending inventory?

30. ## Chemistry

Which of the following is least likely to dissolve in the polar solvent water? oil, salt, sugar, ethanol.

31. ## chemistry

A system delivers 1275 J of heat while the surroundings perform 855 J of work on the system. Calculate ΔU in J.

32. ## Physics

A 2.40 m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 15.1 m/s. The vertical component of Earth's magnetic field in this region is 40.0 µT directed downward. Calculate the induced emf between the

33. ## maths

Formalize the following english statements as quantified WFF. Let S(x) be the predicate "x is a student," B(x) the predicate "x is a book," and H(x,y) the predicate "x has y, " where the universe of discourse is the universe, that is the set of all

34. ## physics

A person sees clearly wearing eyeglasses that have a power of −2.92 diopters and sit 2.22 cm in front of the eyes. If the person wants to switch to contact lenses, which are placed directly on the eyes,what lens power should be prescribed? Answer in

35. ## History

How did the Reformation in Great Britain affect the colonization of the New World?

36. ## Physics

Find the approximate gravitational red shift in 500 nm light emitted by a compact star whose mass is that of sun but whose radius is 10 km.

37. ## social studies

what was the reason for baltimore's successful shipyards?

Find the partial products and the product for 4 x27=?

39. ## physics

A cannon tilted up at a 26.0 degree angle fires a cannon ball at 78.0 m/s from atop a 12.0 m-high fortress wall. What is the ball's impact speed on the ground below?

40. ## Chemistry

If 45.8 grams of MgO are dissolved in 205 grams of water, what is the concentration of the solution in percent by mass?

41. ## Physics

A tennis player places a 58 kg ball machine on a frictionless surface, as shown below. The machine fires a 0.068 kg tennis ball horizontally with a velocity of 31.6 m/s toward the north. What is the final velocity of the machine? ______m/s to the south

42. ## Chem

Describe, in your own words, why stirring a pitcher of lemonade will help the lemonade powder dissolve faster. Be specific in your explanation.

43. ## chem!

i cant figure this one out! :( a balloonist is preparing a trip in a helium balloon. the trip begins in early morning at a temp of 15 degrees Celcius. By mid afternoon, the temp has increased to 30 degrees C. assuming the pressure remains constant at 1.00

44. ## chemistry

Consider the reaction: CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(l) ΔH = - 890.3 kJ What volume of CH4(g) at 25°C and 755 Torr will produce 88600 kJ of heat when reacted with excess oxygen?

45. ## economics

Y= consumption X= Disposable income Y X 5,000 10,000 A 8,000 20,000 B Refer to info above. The slope of the line between points A and B is: A) .3 B) 2.3 C) 3.3 D) indeterminate from this information. How do you figure this out. What is the math to

46. ## chemistry

calculate the molar solubility of barium fluoride in water at 25 degrees C. The solubility product constant for BaF2 at this temperature is 1.0x10^-6

47. ## chemistry

what is the molar solubility of barium fluoride in 0.15M NaF at 25 degrees C?

48. ## HCS/325 HEALTH CARE MANAGEMENT

The Ethical issues considered important in today's health care organization -- how will ethical issues alter your way of conducting change in the organization

49. ## verfying trig identity

1+Cosx 1-Cosx _______ - _______ = 4CotxCscx 1-cosx 1+Cosx

50. ## physics

please help i cannot figure this out A 0.27 kg ball of dough is thrown straight up into the air with an initial velocity of 12 m/s. Find the momentum of the ball of dough halfway to its maximum height on the way up. and A 61 kg pole-vaulter falls from rest

51. ## Math-Probability

What are the odds in favor of rolling a 5 if you roll a 1-6 number cube?

How doyou ask if a friend if they are hungry? Tienes hambre? If they are thirsty Tienes sed? Both should have upside down question marks before question

53. ## physics

A constant horizontal pull of 8.25 N drags a box along a horizontal floor through a distance of 19.1 m. Q How much work does the pull do on the box? Ans: i got the answer as W = 158 J But i have problem with the second question? Question: Suppose that the

54. ## Physics

An infinite thread of charge density lamda lies along Z axis. The potential difference between the points A(4,3,4) and B (3,4,0)is?

55. ## CHEM

a gas bulb is connected to an open end manometer. the pressure in the bulb is .355 torr MORE than atmospheric pressure. If the manometer is filled with mineral oil (density .888 g/cm^3) then what wil be the difference in height between the two sides of the

56. ## Types of Learning

I have to devise a way to use classical conditioning to cure someone of their fear of flying, then identify conditioned or unconditioned stimuli and resources. I can't come up with ideas.

57. ## Chemistry

A mixture of ethyne gas (C2H2) and methane gas (CH4) occupied a certain volume at a total pressure of 16.8 kPa. When the sample burned, the products were CO2 gas and H2O vapor. The CO2 was collected and its pressure found to be 25.2 kPa in the same volume

what does the sound...rolled like the beat of a jungle drum

59. ## Statistics

I am trying to find out the cut off score for selecting 10% of applicants with a mean of 500 and a standard deviation of 100 assuming that the standadized test is normally distributed.

60. ## math

a kite is at height of 30 feet when 65 feet of string is out. if the string is in a straight line, find the angle that it makes with the ground. Round to the nearest tenth of a degree.

61. ## science

an animal without a backbone is called a what?

62. ## Chemistry

How many grams will dissolve on 3.0*10^2mL of 0.050 M Ca(NO3)2? Ksp=8.7*10^-9

63. ## Chem 112

Calculate the pH of a buffer solution prepared by dissolving 0.12 mole of cyanic acid, HCNO and 0.65 mole of sodium cyanate, NaCNO in enough water to make 1.0 liter of solution. [Ka(HCNO) = 2.0 × 10-4] I know that this question has something to do with

64. ## computer science

Create a method called countZeros, which takes an integer array as an input parameter and returns the number of zero entries in the array

65. ## chemistry

write balanced equation of the reaction of bromine and sodium thiosulfate

66. ## math

a kithen is 4 yards wide and 5 yards long.how much will it cost to cover the floor with linoleum at \$16 a square yard

67. ## history

the economic system advocated by margaret thatcher was?

68. ## math

a kithen is 4 yards wide and 5 yards long.how much will it cost to cover the floor with linoleum at \$16 a square yard

69. ## Math-REALLY CONFUSED

Ok, so this worksheet says that a regular heptagon has 7 sides. So, would it have 7 angles, 4 diagonals, 5 triangles, and that the angle sum of the figure is 900 degrees. Am I right on those? But then it says to find the "Measure of each angle". Wouldn't

70. ## marine biology

Choose the plants from the following list that you would find in the lower shore area of the rocky shore. kelp lichens irish moss rockweed

71. ## math - trig

Given the coordinates of the terminal side of an angle in standard position, find the value of sine, cosine, and tangent: (-4,0)

72. ## Macroeconomics

Economist John Taylor has suggested that the Fed use the following rule for choosing its target for the federal funds interest rate (r): r= 2% + ð + 1/2 (y-y*) / y* + 1/2 (ð - ð*), Where ð is the average of the inflation rate over the past year, y is

73. ## Math

What is the square root of 64?

74. ## MATH

what is the most common factor of 6,9,and 7?

75. ## calculus

how do you differentiate problems where the x and y are to the power of a fraction?

76. ## math

to save fuel on the 240 km trip to the cottage, the Nakamura family reduce their usual average speed by 20 km/h. this lengthens their journey by 1 hour. what is the slower average speed? pleassee help! thanks :)

77. ## Physics

An 95.0 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. The astronaut turns away to look at Earth and several seconds later is 26.3 m behind the ship, at rest relative to the spaceship. The

78. ## Chemistry

What is the overall equation, the complete ionic equation, and the net ionic equation for the reaction that occurs when aqueous solutions of cobalt (II) bromide and sodium hydroxide are mixed?

79. ## arithmetic

The first term of a quadratic sequence is 8 and it's fourth is 32. If the second difference of the sequence is 2, find Tn.

80. ## Physics

Suppose we have a test tube with two substances of diffferent densitites inside. We want to use a centrifuge with a rotational radius of .2m to separate them. if we want to achieve a centripetal acceleration of 1000g, how fast does it have to spin/ (what

81. ## Maths

How can I tell if a graph is a function or not? Explain please :)

82. ## math

Find equivalent fractions with a common denominator and order from least to grestest 1/2, 4/9, 4/18

83. ## chemistry

Can I get a poem on acids,bases and salts?

84. ## chemistry

what is the net ionic equation, including phases, for the reaction of AgNO3 with Ba(OH)2

85. ## Math

A slide 2.6 m long makes an angle of 27° with the ground. How high is the top of the slide above the ground? Could someone show me how to solve this? I'm not sure where to begin.

86. ## Algebra 2

If you have 64 feet of fencing available to create a rectangular pen for livestock, what is the maximum area you can enclose?

87. ## geography

Name three major mountain ranges and state to what continents they belong? My answer is--- Rocky Mountains,North America Andes Mountains,South America and Sentinel Mountains, Antarctica is this correct?

88. ## science

what was the altitude in degrees of the moon on 3/18/11

89. ## Chemistry

Balance this equation: Cu + H+(aq) + NO3-(aq) -- Cu2+(aq) + NO2 + H2O

90. ## math

the foyer was 8 feet by 8 feet, but the tiles were 4 square feet. how many tiles will they need to fill the space?

91. ## Algebra I

Can anyone summarize the quadratic formula? I am trying to understand this for algebra without any unnecessary and overused words involved like Wikipedia and sites that give me a headache. I just want a paragraph (or more than if its impossible to

92. ## geography

One inch on a map represents 800 miles. It is 3 1/2 inches on the map from Cape Town, South Africa to Nairobi, Kenya. How many miles is this? If I figured correctly my answer is 2,800 miles. Is this correct?

93. ## English

Can you please check these sentences for me? Thank you. 1) If I won 2 million Euros at the lottery, I would transfer part of the money on(to) my bank account and invest it (in state bonds/government securities) 2)I would buy myself a house in the mountains

94. ## biology /help

6. Erin, Patricia and Larry's daughter, is married to Jeff. Jeff was in a serious car accident and needs a transfusion but Erin is told that Jeff cannot be given her blood. Based on this information, provide Erin's blood genotype and blood phenotype. Can

95. ## English

Can you please check the sentences I wrote on the outbreak of World War One. What do you think? I went to the site you recommended to me (or just "me"?). 1) King Edward VII (1901-1910) came to the throne after the death of Queen Victoria. 2) The Edwardian

96. ## English

I forgot to include the following sentences. I hope you can have a look at them, too. 1)The British upper class still thought of itself as the centre of the civilized world. World War I put an abrupt end to all this. 2) In June 1914 the heir to the

97. ## math

in each of two different fourth-grade classes, 1/3 of the members are girls. does each class have the same numbers of girls.

98. ## Physics

A 57.8 kg pole-vaulter falls from rest from a height of 5.4 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.25 s after landing on the pad. (a) Calculate the athlete's velocity just before reaching the pad. ______ m/s downward (b) Calculate the

99. ## math

show how to explain answer to p-8p

s=5m find the area of square

101. ## Physics

A 1500 kg car is turning around an arc of radius 20 m at a constant speed of 30 mph without slipping. What is the friction force the ground exerts on the car?

102. ## math

solve and show how it explained 5n+10+1-3n

In Swimming Strokes by Lee Carroll in paragraph 1, how many errors are there in subject-verb agreement, parallelism, and pronoun-antecedent agreement?

104. ## Programming

I need help creating a program to compare the value in input with the value in input. For example, if input is less than input print ‘input is less than input’; otherwise, print ‘input is not less than input[1

105. ## MATH

X|Y 25|17 32|24 46|38 59|51 COULD YOU PLEASE EXPLAIN HOW TO GET THE ANSWER.

106. ## math

unpaid balance at the end of the 10th year? loan amount of 250,000

107. ## Programming Logic

I need help creating a program to display the integers from input through input. That is, if input contains 4 and input contains 8, the display 4,5,6,7,8 (on separate lines).

108. ## Programming Logic

I need to create a program that has (at least) two variables, char and num. I need to use nested loops to print char, a character, in the form of the following pattern on as many lines and as many times as specified by num. For example, if char is “M”

109. ## Database Design (SQL)

Hi I need help creating an SQL query to display each faculty member's last name, comma, first name as a CONCATenated element, then their salary as CONCATenated element with a dollar sign and comma. Then, the boss's last name, comma, first name as a

110. ## Database Design (SQL)

I need help creating a query that shows the number of days left before the end of the term. I need the following functions to accomplish this: CONCAT, DAYOFYEAR, NOW. So far I have this for my query: SELECT CONCAT('There are ',DAYOFYEAR(NOW()),'

111. ## function tables

wat is the rule of this? x y 1 5 2 7 3 9 4 11 5 13 6 15

112. ## Physics

A LADY IS GETTING MARRIED IN 2DAYS TIME.HER HUSBAND BUYS HER A DIAMOND RING.ON THE DAY OF HER WEDDING HER HUSBAND PLACES THE RING ON HER FINGER.THE RING REFRACTS AT AN ANGLE OF 23.24 DEGREES.CALCULATE THE ANGLE OF INCIDENCE IF THE REFRACTIVE INDEX OF A

113. ## Algebra

Hi! Today I was absent from my algebra class, and they learned how to recognize and factor the difference of two squares.. I've tried to figure it out from the book, but it's not making any sense... Can someone help? I'm trying to figure out this problem 1

114. ## history

give two reasons that chinas policy of limiting trade with foreigners ended after the 1700's

115. ## English

I urgently need you to check these sentences for me. Thank you very much for all. 1) Mary couldn’t afford to go to the cinema last weekend. She decided to take some money from her brother, Ben (without asking him for it). 2) Her best friend doesn’t

116. ## Chemistry

What would be the resulting molarity of a solution made by dissolving 21.9 grams of KCl in enough water to make an 869-milliliter solution? Show all of the work needed to solve this problem.

117. ## math

Can you explain a little more on equivalent fractions with common denominator 3/4, 2/3, 7/8 thank you verry much.

118. ## Chenistry

If 33.7 grams of LiOH dissolve in enough water to make a 231-gram solution, what is the concentration in percent by mass?

119. ## Chemistry

Why are some substances not able to dissolve in water?

120. ## trig, Phoenix College

Where did the number 0.5736 come from or originated from? Will the horizon be closer or farther away when your eyes are closer to the surface? Will the horizon be closer or farther away when your eyes are farther from the surface?

121. ## math...?

to save fuel on the 240 km trip to the cottage, the Nakamura family reduce their usual average speed by 20 km/h. this lengthens their journey by 1 hour. what is the slower average speed? i was told this question is not complete to answer? is that true?

122. ## Chemistry

What change would increase the amount of gas able to be dissolved in a given amount of liquid water?

123. ## Chemistry

What change would increase the amount of gas able to be dissolved in a given amount of liquid water?

124. ## Physics

Gamma rays of photon energy 0.511 MeV are directed onto an aluminum target and are scattered in various directions by loosely bound electrons there.a) What is the wavelength of the incident gamma rays? b) What is the wavelength of the gamma rays scattered

125. ## chemistry

In a Styrofoam cup calorimeter, what is the final temperature when 100. g of iron at 100. ° C is added to 100. g of water at 20. ° C?

126. ## Physics

X-radiation from a molybdenum target (0.626 A) is incident on a crystal with adjacent atomic planes spaced 4.00x10(-10) m apart. Find three smallest angles at which intensity maxima occur in the diffracted beam?

127. ## math

x|y 6|2 12|4 24|8 33|11

128. ## chemistry

A 0.167 g sample of Mg(s) is burned in a bomb calorimeter which has a heat capacity of 3081 J/°C. In this process, the temperature of the calorimeter increased by 1.34 °C. Calculate the heat given off by burning Mg(s) under these conditions (in kJ/mol).

129. ## physics

Determine the buoyant force a balloon as a funtion of depth. At what depth does the buoyancy occur

130. ## chemistry

A gas bulb is connected to an open end manometer. The pressure in the bulb is 0.355 Torr more than atmospheric pressure. If the manometer is filled with mineral oil (density = 0.888 g/cm3), what will be the difference in height between the two sides of the

131. ## Chemistry

Calculate the enthalpy of reaction. D + F --> G + M using the following equations and data: G + C --> A + B ΔH = +277 kJ C + F --> A ΔH = +303 kJ D  B --> M ΔH = -158 kJ

132. ## Math

sarah and isabel each has an equal amount of money. After sarah spent 18 and isabel spent 25, Sarah had twice as much as Isabel. How much did each of them have first.

133. ## separation of variables

If dy/dx=-3y and if y=1, what is the value of t for which y=1/3? I got y=e^(-3t) but I wasn't for sure if it was correct.

134. ## Chemistry

Calculate the enthalpy of reaction. D + F --> G + M using the following equations and data: G + C --> A + B ΔH = +277 kJ C + F --> A ΔH = +303 kJ D  B --> M ΔH = -158 kJ

135. ## Physics

The arm of a crane at a construction site is 13.1 m long, and it makes an angle of 20° with the horizontal. Assume that the maximum load the crane can handle is limited by the amount of torque the load produces at the base of the arm. (a) What is the

136. ## separation of variables

Find an equation of the curve that passes through the point (1,1) and whose slope at (x,y) is y^2/x^3.

137. ## chemistry

In a certain process, the internal energy of a system increases 40.7 J and the quantity of work the system does on the surroundings is 78.9 J. What is q?

138. ## separation of variables

how do you separate the variable dy/dx=x^2/y given y=-5 when x=3

139. ## chemistry

how many ml of 6m hcl aq are required to react with .10g of mg?

140. ## Geometry

The sides AB and AC of triangle ABC have lengths of 4 inches and 7 inches, respectively. The median AM is 3.5 inches. What is the EXACT length of BC. Show your work.

if you know that AB=0 and A not=to B, what can you say about the equation Ax+By=1? Describe the graph.

142. ## statistics

Data shows that 93% of the people in a certain population are right-handed. A group of 9 people from this population are selected at random. What is the probability that exactly 7 of the people in the group are right-handed? 2

143. ## separation of variables

how do you solve the variable dy/dx=-x^2y^2, y(4)=4

144. ## Linear Inequality + graphing?

don't quite understand how to go about finding the answer to this problem. I have to find two different points for a line, graph it, and also above or below the line to show the relationship. How do I go about doing this? The equation is: 3y-8x >24

145. ## separation of variables

how do you separate the variable dy/dx=-xy^2, y(1)=-0.25

146. ## algebra

don't quite understand how to go about finding the answer to this problem. I have to find two different points for a line, graph it, and also above or below the line to show the relationship. How do I go about doing this? The equation is: 3y-8x >24 Thank

147. ## chemistry

The root mean square speed of CH4 at 160 K is 5.0x102 m/s. At what temperature will the root mean square speed of C2H6 be the same?

148. ## English

Thank you very much for helping me! I forgot to include these last sentences. Can you explain me the difference between "Ought to" and "should". For example, I know I ought not to hurt his feelings (why ought to and not should?) 1) The teacher caught Mike

149. ## math

what is the value of this expression 15 - 3 + 2 - 9

150. ## chemistry

A container holds 1.00 mol O2, and the pressure in the container is 2.00 atm. A student adds 60.0 g of gas Y to the container. The total pressure (of O2 and gas Y) is 3.00 atm. What is the molar mass of gas Y? (V and T constant)

151. ## Math

Elizabeth has a box of shirts. 1/2 of the shirts are small,2/5 of the shirts are medium, and 5 shirts are large. How many shirst are in the box?

152. ## English

wouldn't:couldnt::green: ?

153. ## separation of variables

If dy/dt=-3y and if y=1, what is the value of t for which y=1/3? I got y=e^(-3t) but I wasn't for sure if it was correct.

154. ## Literature

Is the old man in "A Very Old Man with Enormous Wings" a flat or a round character? I can't decide. He has some traits but I don't know if they justify a round character.

155. ## geometry

Given that BD Û AC, which of the following statements is NOT necessarily true?

156. ## geometry

How do I solve this? 4/3PI*R^3 When R=6 I get 288 if I do it in PI form. Just seems really high.

157. ## Math

Ryan can cover the 90 foot distance with an average spped of twenty feet per second... What is Ryans average speed in miles per hour?

the rectangulr backyard measures 131 feet by 52 feet. the garden measures 13 feet by 9 feet. what is the area of the backyard that will be grass.

159. ## math

jennifer used a three-color spinner 100 times. her results were: red 30, green 29, and blue 41. do you think the spinner was fair? explain.

160. ## geometry

find the area of polygon? rhombus with diagonals of 18 and 26

161. ## HiSTORY ....helpppppp

Temperance groups in the 1910s focused on: A. boycotts of saloons and companies that sold or transported alcohol. B. convincing individuals of the evils of alcohol. C. passing local laws outlawing the sale and production of liquor. D. fighting organized

162. ## physics

How much heat does it take to warm up a 300g glass of water by 30 degrees C? (what is the formula for the specific heat of water?)

163. ## calculus

Let q(x)=(x^4)(e^-x). Calculate q'(x). Use q'(x) to determine whether q(5)q(6) (do not use a calculator). Explain your reasoning.

164. ## statistics

using the 98-95-99.7 rule, find the percentage of scores within 20 points of the mean of 50.

165. ## US government

James Madison warned people about the dangers of this conflicting group. Today it is known as an interest group

166. ## com 155

Write several sentences describing a recent interaction with a friend or family member about personal finance or credit cards. This interaction may be imagined or real. Before going to college my son got (his) first credit card. (He) now has (himself) in a

crossword puzzle 9 letters across words given same _ imprudent Rude

168. ## statistics

A population has a norma distribution with a mean of 50 and a standard deviation of 10. what is ther standard z-score corresponding to to 70? what is the standard z-score corresponding to 40?

169. ## Math

Ryan is batting a baseball, he presently can cover the 90 foot distance with the average speed of 20 feet per second What is the average speed in miles per hour?

170. ## Calculus

Someone already asked this question but did not understand the answer given at all. Writing to Learn: In a certain video game a cursor bounces back and forth horizontally across the screen at a constant rate. Its distance d from the center of the screen

ultrasonic sound:sound::light?crossword puzzle 11 letters across

172. ## algebra

-1/8-(-1/4) how do i figure it out

173. ## math

what is the value of the digit in the tens place 805

174. ## Physics

Two objects are moving about so that their total momentum is zero. What can be said about their kinetic energy?

175. ## physics

The Yerkes refracting telescope has a 1 m diameter objective lens of focal length 20 m.Assume it is used with an eyepiece of focal length 4.31 cm. Find the angular magniﬁcation of the planet Mars as seen through this telescope

176. ## math

in the special right triangle. with x on the adjacent. and on the right corner of the oppisite equaling 30 degrees. with y. on the side of the oppisite. and the hypotenuse equaling 40 degrees, how do you find x and y. and what are they?

177. ## math.

in the special right triangle, with the adjacent side equaling 10, and the left angle of the adjacent angle equaling 45 degrees. the hypotenuse side is Y and the oppisite side is X. how do you find x and y, and what are they???

178. ## math

in each of two different fourth-grade classes, 1/3 of the members are girls. does each class have the same numbers of girls

179. ## History

My instructor requested that I write a reflective prep paper for my final essay. Will I use words like (I, me, myself or personally) when referring to myself in a reflective essay? What words do I start the thesis statment with in a reflective essay? My

180. ## us history

what are the four divisive issues of the 1820s

181. ## Finance

Find the lump sum deposited today that will yield the same total amount as payments of \$10,000 at the end of each year for 15 years at a rate of 4% compounded annually.

182. ## math

on the right triangle, the adjacent side's top is T and the bottom is S. the hypotenuse's side equals 13. the oppisite side is equals 12. and the the point oppisite from the adjacent, is R. using this info, what is the sin. of R,the cos. of R, the sin of

183. ## Physics

A box of mass m which carries a charge Q slides down a frictionless inclined plane that makes an angle, theta, with the horizontal. An electric field E points from right to left. How large must E be for the acceleration down the incline to be zero?

184. ## math

please help the multiple choice answers do not match problems! 15-3+2-9 choices 0, 2, 4, 8 16+4divided by 2+9 choices 4, 11, 13, 21

Trying to figure out 19.4(x) = 306.52 (gotta find out what X is

186. ## physics

The nearpoint of an eye is 123 cm. A corrective lens is to be used to allow this eye to clearly focus on objects 25 cm in front of it. What should be the focal point of this lens?

187. ## Physics

The charged plates of a parallel plate capacitor each have a charge density of 3 x 10-3 C/m2. What is the electric field E between the plates?

188. ## English

Thank you . I just need to know if it is right to say "Read pp. 71-75 and then do the following gap-filling activity".

189. ## calculus

Whatt is the equationn in vertex form whose graph has a maxium pointt att (-2,6) and passes through (1,-5)?

190. ## chemistry

how would you say in words LiMnO2 ? would lithium manganese oxide be correct?

191. ## math

in a big right triangle with a small right triangle inside of it. C is the length of the whole thing., R is the adjacent of the small tri. H is the oopisite of the small tri. B is the adjacent of the big tri. as well as the hypotenuse of the small tri. S

192. ## Physics

A 5.0 kg object is at rest with to forces applied to it, and a frictional force holding it in place. The two applied forces are: 15.0 N [x 60degrees y] and 12.0 N [x 215degrees y]. what is the coefficient of statics friction

193. ## Physics

what is the formula used to find time with an Vo at 0, Vf at 22 m/s2, and a constant velocity at 1.7 m/s2?

194. ## Discrete Math

Use mathematical induction to prove the truth of each of the following assertions for all n ≥1. n³ + 5n is divisible by 6 I really do not understand this to much. This is what I have so far: n = 1, 1³ - 5(1) = 6, which is divisible by 6 Then I really

195. ## Chemistry Lab

So we prepared 100mL of .1M solutions of these solutions, and found the pH and H+ contents: pH H+ HCl: .57 .270 HNO3: .58 .260 H2SO4: 1.29 .051 HC2H3O2: 2.44 .0036 H2C2O4: .84 .145 HKC6H4(CO2)2: 4.13 7.41 Now I'm stuck on this question. What conclusions

196. ## Physics

Gamma rays of photon energy 0.511 MeV are directed onto an aluminum target and are scattered in various directions by loosely bound electrons there.a) What is the wavelength of the incident gamma rays? b) What is the wavelength of the gamma rays scattered

197. ## chemistry help!!

a gaseous mixture contains 1 mol of O2 and 2 mol of CO2, exerting a total pressure of 1.5 atm. what amount of CH4 must be added to the mixture in order to increase the total pressure to 2 atm. (assume no gas escapes and there is no change in total volume)

198. ## calculus

integrate 3/25+4x^3....use 2x=5tanΦ as a substitution

199. ## physics

when a stone is thrown into the air it's surface will be in contact with the surrounding air

200. ## Calculusss heeelp plzzz

A rocket is being tracked from a radar post that is 10 km from the launch pad.the rocket arises vertically at a height of 17.32 km and then turns at an angle of 30 degrees fron the vertical directly away from the radar post .it then travels at the constant

201. ## Mathamatics

The diameter of each tire on Niki's bike is 66 centimeters (cm). It takes her 16 minutes to ride 10 kilometers (km). How fast did Niki ride, in kilometers per hour? thx in advance =D

202. ## financial management

You have been hired by first citizens bank as a financial analyst. One of your first assignments is to analyze the present financial condition of Bradley Stores, Incorporated. You are provided with the following 2009 balance sheet and income statement

log 1 12

204. ## Math

Suppose Kalvin flipped a coin to determine his breakfast cereal every day starting on his 12th birthday and continuing until his 18th birthday. How many times would you expect him to eat Cocoablast cereal. I know 6 years times 365 days is 2190 what do I do

205. ## Technology

If you were a housing contractore how would you go about avoiding structure failure in the house that you build in terms of:1 poor design 2 incorrects choice of materials 3 poor workmanship

206. ## News Historical

What's the difference between what's happening in Libya and what happened in Egypt? How did Gadhafi crush the revolution?

207. ## algebra

How do you represent 3 consecutive whole numbers where the smallest of the three is X

208. ## Chemistry

A: A student must make a five-fold dilution of a 2.15 M HCl solution. If the student wishes to make 75.0 mL of the diluted solution, what volume of the 2.15 M solution will he need to dilute? B: What is the concentration of the diluted substance?

209. ## algebra

48/p=12. got 576 but not one of the answer chices(p=6,p=36,p=4,p=60 are the choices)

210. ## psy

help please.... What attributes make someone attractive? How does proximity influence attractiveness? Are people with similar interests more or less attractive than people with different interests? Why? What factors create lasting sustainability in

211. ## physics: roller coasters

what is a collaide loop? what is the difference between a collaide loop and a round loop??

212. ## Geometry

explain the difference between a polygon inscribed in a circle and a circle inscribed in a polygon

213. ## Math

i want to spend 62¢ by only using 4 coins which are 25¢, 10¢, 5¢, 1¢ what are 2 ways I can spend it?

214. ## Math

Len flipped a coin 3 times and got a head each time. What are the chances he will get a tail on his next toss? Explain reasoning. would it be 50/50 because there are two sides

215. ## algebra

What is a7 for the sequence an=2+5(n-1) How do I solve this? Confused.

please is anyone can help me to differentiate betwee them. i am really have a confuse with them.thanks a.analytic vs.manufacturing b.analytic vs.synthetic c.synthetic vs.fabricating process

217. ## physics

A resultant force of 25 Newton acts on mass of 0.5 kg standing from rest. find: a) the acceleration in m/s square b) the final velocity after 20 seconds c) the distance moved in meter

218. ## Tx History

The Mexican War What are the unites states 4 reasons for war? I know one of the reasons is that Mexico refused to pay the united states citizens for damage claims from the Texas revolution.

219. ## Science

1). Assume the following: -the house has 2,000 square feet -80,000 BTU's of heat per sq. foot are required to heat the house for winter. -Natural gas is available at a cost of \$5.00 per thousand cubic feet. -One cubic foot of natural gas supplies 1,000

220. ## math

is 5.2 ,= to 5-2/5

221. ## math

In each of the following order the decimals from least to greatest. a. 24.9419, 24,.942, 24.94189, 24.94199

222. ## PHYSICS

A 494 kg uniform solid sphere has a radius of 0.390 m. Find the magnitude of the gravitational force exerted by the sphere on a 49.1 g particle located (a) 1.45 m from the center of the sphere 1 ? N (b) at the surface of the sphere 2 ? N (c) 0.200 m from

223. ## math

if less then a half of a garden is planted with corn is it a reasonable to estimate that 2-3rds of the garden is planted with corn?

224. ## Science

West Fremont is a community of 3,000 homes. A coal burning power plant supplies electricity for the town. The capacity of the plant is 12 megawatts, and the average household consumes 8,000 kilowatt hours a year. Assuming that the power plant can operate

225. ## Physics

(a) What is the escape speed on a spherical asteroid whose radius is 535 km and whose gravitational acceleration at the surface is 3.0 m/s2? 1 ? m/s (b) How far from the surface will a particle go if it leaves the asteroid's surface with a radial speed of

226. ## Math

how would I write a linear equation to represent the following equation: the school cafeteria sells bottles of soda for 0.75 each and a candy bars for 0.50 each. What is the cost C of s bottles of soda and b candy bars?

227. ## Physics

(a) Determine the amount of work (in joules) that must be done on a 95 kg payload to elevate it to a height of 1007 km above the Earth's surface. 1 ? MJ (b) Determine the amount of additional work that is required to put the payload into circular orbit at

228. ## hcs/341

Explanation of why the student does or does not agree with this statement: “Common sense and compassion in the workplace has been replaced by litigation.” i disagree because if they don't meet the requ=iure menrts then why hire them, what do you think

229. ## physics

a ball dropped from a window strikes the ground 2.99s later. how high is the window?

230. ## Reproductive Cycle

What stimulating factor(s) and receptor(s) could be inhibited that would decrease the release of estrogen? I talked about how you could inhibit GnRH, LH and FSH. But I can't think of any receptors or any other stimulating factors. Any suggestions?

231. ## English

A theme of "Auld Lang Syne" could be: A. memories are valuable when put in their proper place. B. new friendships are valuable. C. loyalty in friendship is a difficult thing to find. D. New Year's Eve celebrations are important. I think it's C?

232. ## English

If I had these analogies, which would be the most logical answer? 1. Metropolis: necropolis :: a)condominium:cemetery b)acropolis:acrophobia c)acronym:pseudonym d)megalopolis:necrotic 2. pachyderm:hypodermic :: a)dermatologist:ectoderm b)giraffe:telescope

233. ## Us History

i need help writing a five paragraph persuasive essay on this The Debate Over Big Business in the 19th century on whose side was better argued?

234. ## algerbra

how to solve 3a+2[2+3a(a-1)]=2(3a+4)

235. ## chemistry

The electron in a hydrogen atom is excited and makes a transition from n=2 to n=7 a. calculate the energy of the photon absorbed in joules. b. calculate the wavelength of the photon in meters HOW DO I DO THIS?

236. ## Physics: Phase changes

how much heat is needed to convert 500g of water at 100 degrees C to steam at 100 degrees C?

237. ## Physics

Find the approximate gravitational red shift in 500 nm light emitted by a compact star whose mass is that of sun but whose radius is 10 km.

238. ## chemistry

We titrated Sprite with 0.1051 M standard NaOH. I've ploted three different titrations and am supposed to use the titration curve to identify the acid. I assume the acid is Citric since it's Sprite, but the lab manual also says "to recall that two K values

239. ## Algebra

You have just graduated from college and landed your first big job. You have always dreamed of being a homeowner, and after carefully shopping for your dream home, you find one that you would like to purchase at a cost of \$250,000. After researching banks

240. ## SCI 230

Describe the plant life, animal life, and geology of the ecosystem inTexas

241. ## Physics

You are trying to package a 50g egg so that it won't break after you drop it from a height of 10 meters. You decide to use wood as a nice soft packaging to protect the egg. When the egg hits the ground, the wood "softens" the landing so that it takes 5

242. ## Chemistry

(1) What is the percentage oxygen in 4grams of caco3. (2) What mass of Oxygen is require to react completely with 16grams of hydrogen.

243. ## Math

The gas tank of a car holds 20 gallons of gas. A gallon of gas costs \$1.22. When the tank was filled it cost \$20. About what percent of the tank was filled?

244. ## math/116 algebra

Application Practice Answer the following questions. If appropriate, use Equation Editor to show your work. First, save this file to your hard drive by selecting Save As from the File menu. Click the white space below each question to maintain proper

245. ## world history

For the period from 1500-1830, compare North American racial ideologies and their effects on society with Latin American/Caribbean racial ideologies and their effects on society

246. ## English

what message does the poem "Ozymandias" convey about earthly power? A. power will bring fame B. with power comes despair C. power is fleeting and will decay D. power brings glory I'm stuck between B and C? I met a traveller from an antique land Who said:

247. ## physics

Ray's weight is 3 times the weight of his sister. His dad weighs twice as much as Ray. Their total weight is 400 pounds. How much does each person weigh?

249. ## Maths

How to find a range (not domain) of function f(x)=square root of x^2-1/square root of 9-x^2

250. ## ALGEBRA

how do you solve a linear equation?

251. ## Science

If you were to move the load by applying force from the top, what kind of machine might be the most appropriate to lift the load 5 cm?

252. ## Chemistry

Calculate the pH of a buffer solution that contains 0.23 M benzoic acid (C6H5CO2H) and 0.28 M sodium benzoate (C6H5COONa). [Ka = 6.5 × 10-5 for benzoic acid] Please help?

253. ## chemistry

What is the pH of a solution with [H+]= 4.75 x 10^-5? I set this up as: pH= -log[H+] =-log (4.75 x 10^-5) = 4.32 Is this the correct to solve this? thanks

254. ## calculus

consider the initial value problem dy/dx=y^2+1, y(0)=0. estimate y(2) 1) use h=1 to compute your estimate I got x1=1 x2=2 y=1=1 y2=3 2)use h=1/2 to compute your estimate I got x1=1/2 x2=1 x3=1.5 x4=2 y1=1/2 y2=9/8 y3=289/128 y4=5.306671143 3) use h=1/8 to

255. ## geometry

A rectangle has a width of 4x+2 and a length of 2x-5. write a function that represents the prime of th rectangle. then find the pimeter if x=7

256. ## english

the assignment is to write a paragraph explaining the key differences between the four types of writing. I need clarification on whether the four types of writing should be summary,analysis,synthesis,evaluation or narrative, descriptive, comparative,

257. ## Statistics

I am doing a stats study and im stuck on what test to perform. Please look at my subject and advise me.. I am testing to see whether a person that is best in math and science will be able remember more numbers than letters and if a person that is better in

258. ## math

how do you rewrite the expression to the 1st power of cosine by using power-reducing formulas? PLEASE AND THANK YOU :D sin^2xcos^4x

259. ## accounting

\$36,000 PAYABLE AT THE END OF THE SEVENTH, EIGHT, NINTH, AND TENTH PERIODS AT 12%

260. ## physical science

Assume this asteroid has the shape of a sphere. A rock sitting on the surface of the asteroid has a weight of 100 newtons. What would the weight of this rock be if it were moved to a distance above the surface equal to the radius of the asteroid? It may be

261. ## physical science

If the asteroid is moving at a constant speed in its orbit, does this also mean it is moving at a constant velocity? Explain your answer.

262. ## acid-base question

This man had a myocardial infarct a couple days ago and his lab report from an arterial blood sample reveals this (normal values in brackets): pH 7.30 (7.35-7.45) HCO3- = 20 mEq/liter (22-26) PCO2 = 32 mmHg (40 mmHg) What's his acid-base status and what

263. ## Math

Paul gets a bill from the sign rental company for \$73.03. Their original quote was \$9.84 per day for the sign, plus \$13.99 for delivery/pick up. For how many days rental was Paul billed?

264. ## grammar

what is the adverb in the following sentence?: I've never seen such a beautiful sight.

265. ## English

Mary Shelley says she conceived the idea of "Frankenstein": A. while watching a frightening storm B. after listening to a discussion about the nature of the creative process. C. after visiting a morgue. D. when she thought of a better ending to Polidori's

266. ## Physics

Two objects are mocing about so that their total momentum is zero. What can be said about their kinetic energy? Choose the most descriptive answer. a. the kinetic energy must be greater than zero b. the kinetic energy must be negative c. the kinetic energy

267. ## HiSTORY ....helpppppp

what did it mean to be modern in the 1920's?

268. ## math

graph y=-x2-8x-17

269. ## geometry

a model rocket shot up a to a point 20 m above the ground, hitting a smokestack, and then dropped straight down to a point 11 m from its launch site. Find to the nearest meter the total distance traveled from launch to touchdown

270. ## math

find a rule for each table, write an equation for each rule. x|y 0|16 20|36 36|52 42|58

271. ## Math

Which of the following cannot be the lengths of a 30°-60°-90° triangle? A: 10/3, 20/3, 10/3 √3 B: 3, 3/2, 3√3 C: 11, 22, 11√3 D: 5/2, 5, 5/2 √3 I believe the answer is B, but I'm not sure.

272. ## English

1. My school has an artificial playground, so students can play soccer in it. 2. My school has an artificial soccer field, so students can enjoy playing soccer after school. 3. My school has beautiful flowers, so it is great to look at them in spring. 4.

25% of 176

274. ## Chemistry

How does the pH of 400mL of water change when a. 100mL 0.0500M NaOH is added? b. 100mL 0.0500M HCl is added?

275. ## Science

How can you make density of 1g/ml, for a 600 ml bottle whose mass is 27 gms

276. ## Science

How can you make density of 1g/ml, for a 600 ml bottle whose mass is 27 gms

277. ## English

What do you do after school? 1. I go back home directly and do my homework in my room, and then I watch TV for two hours. 2. I go to an academy to learn math, Korean and English. After that I go back home as soon as possible to do my homework. 3. I often

278. ## Chemistry

What is the composition of 0.1M sodium acetate buffer,pH 5.00?

279. ## Chemistry

what is the composition of 0.05M potassium phthalate buffer ,pH 5.00? phathalic acid (PH2,PH^-1,P^-2)is dibasic with pKa values of 2.95 and 5.41

280. ## English

1. This is Shrek, who is the main character in the movie, Shrek 3. 2. This is Shrek, who is fun, strong and tall so that many children likes him. 3. This old lady in Mother Teresa, who devoted herself to helping poor people in India. 4. This old lady is

281. ## Chemistry

Starting with 1.0M acetic acid and 0.50M NaOH, how would you prepare 100ml of 0.10M acetate buffer , pH =4.50? pKa of acetic acid is 4.74 (abbreviations : acetic acid = HAc,Acetate =Ac- )