# Questions Asked onMarch 21, 2012

1. ## bio

The cell membrane is a highly selective barrier that controls the movement of substances in and out of the cell. In fact, polar molecules are unable to go across unless A. they are enclosed in water-filled vesicles. B. they pass through channels in the

2. ## science

deduce what similarities would be found in the DNA structure of genes from a cat human and eucalyptus tree

3. ## science

why does a cool, distant, supergiant star such as Betelgeuse have such a high apparent magnitude? PLEASE HELPPPPP!!!!!!

4. ## physics

In figure p4.36, m1 = 10kg and m2 = 4.0kg. the coefficient of static friction between m1 and the horizontal surface is 0.50, and the coefficient of kinetic friction is 0.30. (a) if the system is released from rest, what will its acceleration be? (b) if the

5. ## geometry

find the value of x in each triangle: triangle x has 1 angle at 53 degree for value x i got: 63.5 degree is that correct? Classify each triangle. 7. The measures of 2 angles are : 45 degree and 45 degree i got: acute 8. the measures of 2 angles are 15

6. ## English paragraph writing

I have to write these paragraphs for a writing assignment and just wasn't sure is I was doing it right. Need some advice!! ASSIGNMENT: You’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and

7. ## CHEM

A 0.552 g sample of ascorbic acid(Vitamin C) was dissolved in water to a total volume of 20.0 ml and titrated with 0.1103 M KOH. The equivalence point occurred at 28.42 ml. The pH of the solution at 10.0 ml of added base was 3.72. From this data, determine

8. ## Chemistry!!!

Consider a solution that is 0.022 M in Fe2+ and 0.014 M in Mg+2. A). If potassium carbonate is used to selectively precipitate one of the cations while leaving the other on solution, which cation will precipitate first? What minimum concentration of K2CO3

9. ## CHEM

Consider the reaction, 3 NO2(g) + H2O(l) ® 2 HNO3(aq) + NO(g), where DH = – 137 kJ. How many kilojoules are released when 92.3 g of NO2 reacts?

10. ## chem

Consider the reaction: C3H8(g) + 5 O2(g) ® 3 CO2(g) + 4 H2O(g), where DH = – 531 kcal/mol. Which statement is true? A.Heat is absorbed. B.The bonds formed in the products are stronger than the bonds broken in the reactants. C.The products are higher in

11. ## math

Simplify the radical expression by rationalizing the denominator: 2(square root)108 / (square root) 180y Please show me how to set up and how to solve

12. ## science

If Deneb and Rigel were located at alpha Centauri's distance from earth, how would they appear? PLEASEEE HELPPPPPP!!!!!!!!!!

13. ## geometry

find the value of x in each triangle: triangle x has 1 angle at 53 degree for value x i got: 63.5 degree is that correct? Classify each triangle. 7. The measures of 2 angles are : 45 degree and 45 degree i got: acute 8. the measures of 2 angles are 15

14. ## Chemistry

Consider the reaction: PCl3(g) + Cl2(g) PCl5(g). If [PCl3] = 0.78 M, [Cl2] = 0.44 M, and [PCl5] = 0.88 at equilibrium, what is the value of K? A.0.39 B.1.4 C.2.6 D.0.72 Thanks!

15. ## physics

consider the following: A point on the tip of a tuning fork vibrates in harmonic motion described by the equation d=10sin(ωt). 1. ω for a tuning fork that has a frequency of 535 vibrations per second. (I don't understand this question) 2. How many cycles

A 80- kg child sits in a swing suspended with 2.6- m-long ropes. The swing is held aside so that the ropes make an angle of 46 o with the vertical. Use conservation of energy to determine the speed the child will have at the bottom of the arc when she is

17. ## math

A rectangular park has an area of 6 square miles. The width of the property is 3/8 the length of the property. What is the width of the property?

18. ## Chemistry

What is true about H+ and OH- when the endpoint is reached in an acid-base titration?

19. ## physics

A buoy oscillates in simple harmonic motion according to the motion of waves at sea. An observer notes that the buoy moves a total of 6 feet from its lowest point to its highest point. The buoy returns to its highest point every 15 seconds. Amplitude: 6

20. ## statistics

in a batch of 15 students failed in a test. the marks of 10 who have passed were 9,6,7,8,8,9,6,5,4,7.find the median of all 15 students.

A 80- kg child sits in a swing suspended with 2.6- m-long ropes. The swing is held aside so that the ropes make an angle of 46 o with the vertical. Use conservation of energy to determine the speed the child will have at the bottom of the arc when she is

22. ## physics

A spherically symmetric object, with radius R = 0.50 m and mass M = 1.3 kg, rolls without slipping across a horizontal floor, with velocity V = 2.1 m/s. It then rolls up an incline with an angle of inclination θ = 25° and comes to rest a distance d = 3.0

23. ## Science/Chemistry

please help... What is the molarity of 3.68mL of a solution containing 0.0025 moles of calcium chloride?

24. ## physics

A volume of gas v at temperature T1 and pressure P, is enclosed in a sphere. It is connected to another sphere of volume v/2 by tube and stopcock. This second sphere is initially evacuated and the stopcock is closed. If the stopcock is now opened and the

25. ## math

Please explain how to set this up and how to solve: A school's rectangular athletic fields currently have a length of 125 yd and a width of 75 yd. the school plans to expand both the length and the width of the fields by x yards. What polynomial is

26. ## Math

carpet at a British home supply store sells for 16 pounds(currency)per square meter.What is the price in dollars per square yard.

27. ## Physics

A mass m=400g hangs from the rim of a wheel of radius r=15cm. When released from rest, the mass falls 2.0m in 6.5sec. Find the moment of inertia of the wheel

28. ## statistics

Musical styles other than rock and pop are becoming more popular. A survey of college students finds that 48% like country music, 30% like gospel music, and 10% like both. What is the conditional probability (±0.01) that a student likes gospel music,

29. ## Physics

Two objects of equal mass are on a turning wheel. Mass 1 is located at the rim of the wheel while mass 2 is located halfway between the rim and the axis of rotation. The wheel is rotating with a non-zero angular acceleration. For each of the following

30. ## chemistry- Stoichiometry

If 852.04 g Al(NO3)3 reacted with the 741.93 g Na2CO3, which would be the limiting reagent? c. Use the limiting reagent to determine how many grams of Al2(CO3)3 should precipitate out in the reaction. d. If only 341.63 g of Al2(CO3)3 precipitate were

31. ## physics

The sun radiates energy at the rate of 3.92x 10^26 W. (a) What is the change in the sun's mass in one second? (b)How much mass does the sun lose in the lifetime of your average earthling (say, 75 years)?

32. ## biology

Organisms must be able to adapt to a changing external and internal environment. An organism's ability to maintain a stable internal environment is known as homeostasis. How does a cell's membrane help an organism maintain homeostasis? A. Cell membranes

33. ## physics

A large water tank has an inlet pipe and an outlet pipe. The inlet pipe has a diameter of 2.19 cm and is 1.25 m above the bottom of the tank. The outlet pipe has a diameter of 5.93 cm and is 4.85 m above the bottom of the tank. A volume of 0.411 m^3 of

34. ## physics

A buoy oscillates in simple harmonic motion according to the motion of waves at sea. An observer notes that the buoy moves a total of 6 feet from its lowest point to its highest point. The buoy returns to its highest point every 15 seconds. Amplitude: 6

35. ## algebra

sara can take no more than 22 pounds of luggage on a trip. her suitcase weighs 112 ounces. how many more pounds can she pack and not go over the limit?

36. ## science

what would be the absolute magnitude and color of a main sequence star with a temperature of 25,000 kelvin? HELP!

37. ## physics

The spring in the muzzle of a child's spring gun has a spring constant of 780 N/m. To shoot a ball from the gun, first the spring is compressed and then the ball is placed on it. The gun's trigger then releases the spring, which pushes the ball through the

38. ## Physics

Two trucks that appear to be identical collide on an icy road. One was originally at rest. The trucks stick together and move off at more than half the original speed of the moving truck. What can you conclude about the contents of the two trucks?

39. ## Chemistry

Given the following equation: Na2O + H2O ---> 2 NaOH. How many grams of NaOH is produced from 1.20 x 10^2 grams of Na2O? How many grams of NaO2 are required to produce 1.60 x 10^2 grams of NaOH?

40. ## income tax

Marion drives 20 miles a day from his first job to his second job. He worked 125 days during 2011 on both jobs. What is Marion's mileage deduction rounded to the nearest dollar assuming he uses the standard mileage rate and mileage is incurred ratably

41. ## economics

A monopoly firm is different from a competitive firm in that A. there are many substitutes for a monopolist's product while there are no substitutes for a competitive firm's product B. a monopolist's demand curve is perfectly inelastic while a competitive

42. ## Physics

If you were standing in a bus moving at constant velocity would you have to lean in some special way to compensate for the bus's motion? Explain . What if the bus were at a constant acceleration? Explain.

43. ## chemistry

A 3.555 g sample of a monoprotic acid was dissolved in water. It took 23.32 mL of a 0.875 M NaOH to neutralize the acid. Calculate the molar mass of the acid.

44. ## English

1. My hobby is computer games. 2. My hobbies are computer games. 3. My hobby is a computer game. 4. My hobby is computer game. 5. My hobby is playing computer games. (#5 is right. What about the others? Which ones are grammatical?...thank you for your

45. ## physics

A kettle containing 1 kg of water has just reached its boiling point. How much energy, in joules, is required to boil the kettle dry?

46. ## physics

a person observes a firework display from a safe distance of 750 kilometer assuming that sound travels at 340 meters per second in air what is the time between the person seeing and hearing a fireworks explosion?

47. ## math

The weights of adult long-tongued fruit bats are known to be normally distributed with a mean of 20.22 grams and a standard deviation of 3.23 grams. What is the probability that a randomly selected bat will: a) weigh at most 15 grams? b) weigh less than 30

48. ## physics

A typical jogger burns up food energy at the rate of about 43 kJ per minute. How long would it take to run off a piece of cake if it contains 435 Calories?

49. ## Equation from Three Points*HELP*

Write the standard equation for the circle that passes through the points: (0, 0) (6, 0) (0, - 8) You must include the appropriate sign (+ or -) in your answer. Do not use spaces in your answer. x 2 + y 2 x y = 0 HELP PLEASE I NEED STEP BY STEP

50. ## statistics

Late payment of medical claims can add to the cost of health care. An article (M. Freudenheim, "The Check Is Not in the Mail," The New York Times, May 25, 2006, pp. C1, C6) reported that for one insurance company, 85.1% of the claims were paid in full when

51. ## Physics

A 0.31 kg pendulum bob passes through the lowest part of its path at a speed of 2.02 m/s. The acceleration of gravity is 9.8 m/s2 . What is the tension in the pendulum cable at this point if the pendulum is 72 cm long? Answer in units of N

52. ## Physics

A car is driven at a constant speed of 85 km/h down a road. The car's engine delivers 49.2 kW of power. Calculate the average force that is resisting the motion of the car.

53. ## Physics Help!!

A 33.0-mH inductor has a reactance of 2.20 kΩ. (a) What is the frequency of the ac current that passes through the inductor? (b) What is the capacitance of a capacitor that has the same reactance at this frequency? (c) The frequency is tripled, so that

54. ## chemistry

A 3.555 g sample of a monoprotic acid was dissolved in water. It took 23.32 mL of a 0.875 M NaOH to neutralize the acid. Calculate the molar mass of the acid.

55. ## Chemistry

Consider the equation: A + 4B=3C+3D, when equal masses of A and B are reacted, which is limiting? My possible answers are: A)if the molar mass of A is less than the molar mass of B, then B must be limiting. B) If the molar mass of A is greater than the

56. ## chemistry

72.33 mL of 0.137 M HCl was added to an Erlenmeyer flask and is titrated with 0.165 M NaOH. Calculate the pH when 5mL of NaOH is added after the equivalence point has been reached.

57. ## physics

A 33.0-mH inductor has a reactance of 2.20 kΩ. (a) What is the frequency of the ac current that passes through the inductor? (b) What is the capacitance of a capacitor that has the same reactance at this frequency? (c) The frequency is tripled, so that

58. ## Physics

You are sitting at a baseball game when a foul ball comes in your direction. You prepare to catch it barehanded. In order to catch it safely, should you move your hands toward the ball, hold them still, or move them in the same direction as the moving

59. ## CHEMISTRY

Rank the following complex ions in order of increasing wavelength of light absorbed. (Use the appropriate symbol to separate substances in the list.) Co(H2O)63+, Co(CN)63-, CoI63-, Co(en)33+

60. ## chemistry

72.33 mL of 0.137 M HCl was added to an Erlenmeyer flask and is titrated with 0.165 M NaOH. Calculate the pH when 5mL of NaOH is added after the equivalence point has been reached.

61. ## arithmetic

The pet shop owner told jean to fill the new fish tank 3/4 full of water.Jean filled the tank 9/12 full.What fraction of the tank does she still need to fill?

62. ## Types Of Business Writing

Assigment: write a business letter according to the background. Background:Assume that you’ve worked for the last five years as an administrative assistant for the Human Resources Department of Broadworth General Hospital. The Director of Human

63. ## Economics

The market demand in a Bertrand duopoly is P = 15 - 4Q, and the marginal costs are \$3. Fixed costs are zero for both firms. Which of the following statement(s) is/are true? a.P = \$3. b.P = \$10. c. P = \$15. d. None of the statements associated with this

64. ## media

most local newspapers get their national news from a) government reports, press briefings, and announcements b) interviews with politicians c) local reporters d) wire services e) the Internet

65. ## accounting

Mia Enterprises sells a product for \$90 per unit. The variable cost is \$40 per unit, while fixed costs are \$75,000. Determine the (a) break-even point in sales units, and (b) break-even point if the selling price was increased to \$100 per unit.

66. ## social studies

What does apartheid mean?

67. ## physics

The sun radiates energy at the rate of 3.92x 10^26 W. (a) What is the change in the sun's mass in one second? (b)How much mass does the sun lose in the lifetime of your average earthling (say, 75 years)?

68. ## probability

Suppose an unfair coin comes up heads 52.2% of the time if it is flipped. If the coin is flipped 26 times, what is the probability that: a) it comes up tails exactly 12 times? b) it comes up heads more than 22 times?

69. ## English

No wonder can last more than three days All good things are three are the same statements ? conquer is opposite of overpower 2 submit 3 subject 4 vanquish 5 master .

70. ## dressmaker

when paper pattern pieces are dovetailed in cutting layout they're placed so they A-all face the same direction. B fit closely together to save fabric.c have their grain lines on the bias. d are lying face down on the fabric

71. ## physics

A supertanker filled with oil has a total mass of 14.1·10^8 kg. If the dimensions of the ship are those of a rectangular box 271 m long, 93.1 m wide, and 93.1 m high, determine how far the bottom of the ship is below sea level (ρsea = 1020 kg/m^3).

72. ## principles of physics

A 19.3- gmass of gold in the form of a cube is 1.00 cmlong on each side (somewhat smaller than a sugar cube).What would be the length of the sides of a cube having four times this mass of gold?

73. ## physics

A volume of gas v at temperature T1 and pressure P, is enclosed in a sphere. It is connected to another sphere of volume v/2 by tube and stopcock. This second sphere is initially evacuated and the stopcock is closed. If the stopcock is now opened and the

74. ## physics

A child loses his balloon, which rises slowly into the sky. a) If the balloon is 21.5 cm in diameter when the child loses it, what is its diameter at an altitude of 1150 m? Assume that the balloon is very flexible and so surface tension can be neglected.

75. ## media

what trend has helped hasten the homogenization of national news in the past decade? a) a rise of the Internet as a major source of news reporting b) the corporate consolidation of news media into a small number of conglomerates c) the growing popularity

76. ## algebra 1b

the speed of a passenger train is 18mph faster than the speed of a freight train. The passenger train travels 310 miles in the same time it takes the freight train to travel 220 miles. Find the speed of each train passenger train mph and freight train mph

77. ## Math

Robert and his dad want to build a sandbox for his sister's birthday.They wanted it to be 4 feet wide and have an area of 28 square feet. What is the length of the sandbox? 7? Robert's dad decided to make the sandbox bigger by extending the length and

78. ## media

because of their dependence on government sources, the news media are unable to set the agenda of debate. true or false

79. ## statistics

1-the graduate selection committee wants to select the top 10% of applicants. On a standardized test with a mean of 500 and a standard diviation of 100, what would be the cutoff score for selecting the top 10% of applicants, assuming that test is normally

80. ## Trial Balance Sheet

need help with trial balance for Masasi company for June 30,2008

81. ## PHYSICS~~~

How much work is needed to push a 142- kg packing crate a distance of 2.45 m up an inclined plane that makes an angle of 20 o with the horizontal, when inclined plane is frictionless?

82. ## physics

A 33.0-mH inductor has a reactance of 2.20 kΩ. (a) What is the frequency of the ac current that passes through the inductor? (b) What is the capacitance of a capacitor that has the same reactance at this frequency? (c) The frequency is tripled, so that

83. ## physics

What is the period and frequency of a 10-pound weight oscillating (as a pendulum) on a 5-meter-long rope?

84. ## math

1) Why should we clear fractions when solving linear equations and inequalities? Demonstrate how this is done with an example. Why should we clear decimals when solving linear equations and inequalities? Demonstrate how this is done with an example.

85. ## Pre-Cal

Find the distance from point (-1, 3) to the line 5x- 4y= 10.

1. A 26.0-Ω resistor, a 12.0-µF capacitor, and a 17.0-mH inductor are connected in series with a 150-V generator. (a) At what frequency is the current a maximum? 2.A series circuit contains only a resistor and an inductor. The voltage V of the generator

87. ## chemistry

How man grams of nitrogen monoxide are needed to react with adequate oxygen to produce 89.6 L of nitrogen dioxide

88. ## Language Arts

Need some help on the question below. "California was settled sooner than many Western states. The promise of gold first drew miners and settlers. Good climate and fertile land held them there (more successfully, most successfully) though." I know you use

89. ## algebra

Explain how you can determine from the graph of a system of two linear equations in two variables whether it is an inconsistent system of equations.

90. ## physics

A volume of gas v at temperature T1 and pressure P, is enclosed in a sphere. It is connected to another sphere of volume v/2 by tube and stopcock. This second sphere is initially evacuated and the stopcock is closed. If the stopcock is now opened and the

91. ## physics

A volume of gas v at temperature T1 and pressure P, is enclosed in a sphere. It is connected to another sphere of volume v/2 by tube and stopcock. This second sphere is initially evacuated and the stopcock is closed. If the stopcock is now opened and the

92. ## physics 30

An alpha particle moving at a speed of 5.20x10^4 m/s enters a perpendicular magnetic field with a strength of 3.0 mT. The magnitude of the acceleration of the particle as it enters the magnetic field will be a.bcx10^d m/s^2 ?

93. ## math

Statistics: Analyze student exam scores Students were given an exam with 300 multiple choice questions. The distribution of the scores were normal and the mean was 195 with a standard deviation of 30. you may find it helpful to draw out this distribution

94. ## Math

Robert and his dad want to build a sandbox for his sister's birthday.They wanted it to be 4 feet wide and have an area of 28 square feet. What is the length of the sandbox? 7? Robert's dad decided to make the sandbox bigger by extending the length and

95. ## principles of physics

Find the density of a 4.2- kg solid cylinder that is 13 cm tall with a radius of 5.0 cm.

96. ## physics

A simple Atwood's machine uses two masses, m1 and m2. Starting from rest, the speed of the two masses is 7.0 m/s at the end of 5.0 s. At that instant, the kinetic energy of the system is 100 J and each mass has moved a distance of 17.5 m. Determine the

97. ## trig

Determine the least positive value of t for which d=0. d=cos((3pi/4)(t)) 0=cos((3pi/4)(t)) I got stuck on this step Please help

98. ## Chemistry

The density of a 40.0% by weight aqueous solution of NaOH is 1.432 g/cm3 what is the molarity of NaOH?

99. ## computer science

write a program to select the classes that you are taking(Ex. Computer Science) .When the button is clicked, the program should print the names of the computer language studied. If no, check boxes have been selected, the sentence "No language studied

100. ## math

Simplify th radical expression by rationalizing the denominator: 2(square root)108 / (square root) 180y Please show me how to set up and how to solve.

101. ## Psychology

What are the primary biological foundation of psychology linked to behavior?

102. ## geometry

The perimeterof a square is 32 inches. Find the lenght of its diagonal. the answers should be in simplest form. make a sketch and show work.

103. ## statistics

At the end of the festival the organizers estimated that a family of participants spent an average of \$90.00 with a standard deviation of \$15.00. What’s the probability that the mean amount spent will be NO more than \$75?

104. ## Math

A conical paper cup for holding popcorn has a radius of 3 in. and height of 6 in. How much paper, to the nearest square inch, is used to make the cup?

105. ## Chemistry

Calcium carbonate decomposes on heating producing potassium nitrate and oxygen. Write a balanced equation for this reaction. Heating 100g of pure potasium nitrae what mass of potassium nitrate would be produced?

106. ## Senior Project on Japanese

I'm trying to do a senior project on japanese language but it has to be something specific about the language according to my senior project techer. any ideas?

107. ## media

True or False Newspapers are among the most heavily regulated media in the United States.

108. ## to writeacher

can you help me with science. we usually have science on wednesday, but during that time, i have to go to violin. i don't get aything about electricity or magnets.

109. ## English

Writeacher, I urgently need your help to check a few things. 1) Which of them is the girl to whom you are enganged? 2) Paris, which I visited las year, is one of the most romantic cities I've been to/to which I've been/where I've been/where I've

3x^2-x-16=0 Use the quadratic formula to solve this.

111. ## 8-12 sentence paragraph

I have to write these paragraphs for a writing assignment and just wasn't sure is I was doing it right. Need some advice!! ASSIGNMENT: You’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and

112. ## chemistry

A basic buffer is prepared by adding 0.3310g of NH4Cl to 1.00L of 0.2088 M NH3. Kb (NH3) = 1.8x10-5.

113. ## Basic Chemistry

The density of a 40.0% by weight aqueous solution of NaOH is 1.432 g/cm3 what is the molarity of NaOH?

114. ## physics so confused

1. A 26.0-Ω resistor, a 12.0-µF capacitor, and a 17.0-mH inductor are connected in series with a 150-V generator. (a) At what frequency is the current a maximum?

115. ## chemical

what's the vapor pressure of naphthalene in the 50 degree centigrade?

116. ## chemistry

will SrSO4 precipitate when .1g of Na2SO4 are added to 1L of a .01M solution of Sr

117. ## Chem 2

Checking to see if I did this right? Titration of HN03 titrated with NaOH ending result is 1.38. Titration A, endpoint pH = 8 is pKa or pKb= 1.38x106=5.861 and Titration of NH03 titrated with KOH ending results 1.54. Titration B, endpoint pH = 7 is KaorKb=

118. ## English

1. My hobby is soccer. 2. My hobby is baseball. (Are both grammatical?)

119. ## English

Could you please check these few things? Thank you, Writeacher. Here is the password connected to the students' class email address. If you want you can check the names of the students who have sent email so far. Could you please ask them all to send a

120. ## math

in his left pocket ralph has 4 quarters and 5 nickels. in his right pocket he has 3 quarters 2 nickels and 1 penny. if he wants to select a quarter at random, which pocket should he choose?

121. ## to writeacher

can you help me with science. we usually have science on wednesday, but during that time, i have to go to violin. i don't get aything about electricity or magnets.

122. ## CHEMISTRY

TO PREPARE 10% HCL SOLUTION ,HOW MUCH AMOUNT OF 35%HCL IS USED.SPECIFIC GRAVITY 1.18

123. ## physics

Donald Duck and his nephews manage to sink Uncle Scrooge's yacht (m = 3527 kg), which is made of steel (ρ = 7850 kg/m^3). In typical comic-book fashion, they decide to raise the yacht (which is now on the bottom of a lake) by filling it with ping-pong

124. ## physics 30

An electron that has a distance of 10.0 cm , is accelerated from rest through a potential difference of 4.50 kV before it enters a region between perpendicular elecric and magnetic fields. The electron moves into a region between positively charged plate

125. ## ap world history

Can you compare North American racial ideologies and their effects on society with Latin American/Caribbean racial ideologies and their effects on society in 1500-1830?

126. ## physics

You have three metals - lithium, aluminum, and mercury. Their work functions are: 2.30, 4.10eV, and 4.5eV respectively. Light with a frequency of 1 x 10^15 Hz is incident on all three metals. Determine (a) which metals will emit electrons and (b)the

127. ## math

a rectangular garage has a floor area of 240 square feet. What are all the possible length and width

128. ## Science Help

How does a periscope work when it has 2 mirrors and light? A.Lenses refract the light B.Light bends as it travels and mirrors bend the light more C.Light travels in a straight line and the mirrors reflect the light D.Lenses and mirrors reflect the light

129. ## income tax

On May 26, 2007, Jamal purchased machinery for \$30,000 to be used in his business. He did not elect to expense the equipment under §179 or the bonus. On October 10, 2011, he sells the machinery to a scrap metal dealer. What is his cost recovery deduction

130. ## Spanish-Check please! I need help

Please check-I'm having a problem interpreting these questions and I have to answer them for homework. Could you please check my translation I'm not sure what these questions mean and I have to answer them for homework ¿Qué necesitas para comer en

131. ## Chemistry

What volume of 3.0M sodium hydroxide will be needed to neutralize 2.0 L of 1.0M hydrochloric acid?

132. ## Revised paragraph of 8-12 sentences

I have to write these paragraphs for a writing assignment and just wasn't sure is I was doing it right. Need some advice!! ASSIGNMENT: You’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and

133. ## biology

Food that is consumed often enters the body in the form of large organic molecules, such as proteins and starches. Prior to entering cells, however, these large molecules must be broken down into smaller molecules. For example, proteins are digested into

134. ## History

Tell meabout Forced Sterilization and its sue int he U.S. What was the total number of people in the U.S. sterilized and the reasons why. How was this later imitated by the Nazi people?

135. ## English paragraph writing

I have to write a paragraph of 8-10 sentences convincing my cousin that she has the skills to tackle the job of assistant to my boss, list 3 or 4 responsibilities,,

136. ## Algebra

The table shows the minimum wage for three different years. Year 1940, 1968,1997 wages for 1940 \$.025, 1968 \$1.60, 1997 \$5.15 estimate the minimum wage in 1976 and compare it to the actual value of \$2.30 and estimate when the minimum wages was \$1.00. If

137. ## psychology

What are some developmental theories of childhood that can be applied to the movie "The Bad Seed"?

138. ## physics

Neona is on a tricycle A, combined mass 62 kg, and Alyssia is on tricycle B, combined mass 54 kg. They are initially at rest, but they push off of each other. What is Neona's speed immediately after the push if Alyssia's is 4.2 m/s?

139. ## Physics

A ball is moving at 82 m/s when it hits a ball at rest which has a mass fours times as big as its own. The formally stationary ball leaves the collision with a speed of 7.5 m/s what is the final velocity of the first ball?

140. ## science/chemistry

I have the answer but how do you solve for this problem: What is the freezing point of a sugar solution prepared by dissolving 375.00g of sucrose (342.3g/mol) in 1500.0g of water (Kf of water=1.86 degrees Celcius)?

141. ## College Algebra

The illumination produced by a light source is inversely proportional to the square of the distance to the source. If a light source 5m from an object illuminates with 70 candela, what illumination would be produce if the object were mover to 12 m away?

142. ## media

which media source is most critical in setting news agendas? a) the Internet b) tv c) magazines d) radio e) newspaper

143. ## MATH

THERE ARE 20 PAGES IN JAMAL BOOK HE READ 1/5 OF THE BOOK HOW MANY PAGES DID HE READ

144. ## Ms. Sue help!!!

Is 87 rounded to 90 or 85? I have to round to nearest fifth

145. ## maths

If I am a proper fraction with a denominator of 20 and my decimal equivalent is 0.6 then what am I

146. ## Statistics

With a spent average of \$90.00 with a standard deviation of \$15.00, what is the maximum amount that you can spend and still be in the lowest 20%?

147. ## Income Tax

Which of the following is not a "trade or business" expense? A. Mortgage interest on a warehouse B. Depreciation on business equipment C. Mortgage interest on a personal residence D. Cost of goods sold is it C

148. ## Opinion

Which class would be better(easier) to take Earth Science or Astronomy?

149. ## Physics

Michelle pulls a 14.5 kg wheeled cart with a rope along a flat road. The rope makes a 28.0 degree angle with the horizontal. If the tension in the rope is 350 N and she pulls the cart 56.7m how much work does Michelle do?

150. ## PHYSICS*****

A block of mass m = 300 g is released from rest and slides down a frictionless track of height h = 59.4 cm. At the bottom of the track the block slides freely along a horizontal table until it hits a spring attached to a heavy, immovable wall. The spring

151. ## algebra 1b

it is known that making 1 lb of honey requires 20,000 trips by bees to flowers to gather nectar. How many pounds of honey would 75,000 trips produce how many pounds of honey would 75,000 trips produce.

152. ## ALGEBRA1

Consider the equation 4x + 6y = 48. Part 1: On your own paper, graph this equation using the slope-intercept method. In the space provided, explain, in words, each step of the procedure you used. Part 2: On your own paper, graph this equation using the

153. ## English

This is what I meant in the previous sentence. Thank you. 1)I want to say that if this person knows the password, he can check the names of the students who have already sent mail to their parterns.

154. ## Chemistry

25.0 grams of ammonium sulfide reacts with 25.0 grams of copper nitrate A) which reactant is limiting B) how much of the Excess reactant remains C) what is the theoratical yield

155. ## physics

2 moles of an ideal gas at 20k changes from a pressure of 15 atm to 3 atm at constant temperature. Calculate the work done by the gas.

156. ## Calculus

Evaluate the limit. The limit as x approaches 0 of (x-sin(x))/(x-tan(x))

157. ## English

I still have a doubt on a few sentences. 1. They are criticizing everything that/which/no pronoun I do. Which are possible? 2. I found a toy car, whose (of which is a mistake?) flat tyre was missing. As to the comprehension you suggested to me is the last

158. ## pre-algebra

you have twice as many dimes as you do nickels and two more quarters than nickels that equals \$2.50

159. ## physics 30

A current-carrying conductor that is 8.00x10^-2 m long is placed perpendicular to a magnetic field that has a strength of 6.00x10^-3 T. During a 3.00s time interval, 7.50x10^19 electrons pass a point in the conductor. The magnitude of the average magnetic

160. ## Physics

Tim and Ray have the same mass and they both climb up the same hill. Tim climbs the hill in 12 minutes and Ray in 22 minutes. a) Who does more work? b) Who develops the most power?

161. ## algebra 1b

There are approximately 31lbs of muscle for every 41lbs of body weight of a certain animal for a 96-lb animal, how much of the weight is muscle?

162. ## Math

What is the mean of these numbers 15, 50, 15, 0, 100

163. ## Calculus

I'm having trouble reversing the order of integration of ∫∫dxdy from a=0 to b=2(3)^(1/2) for x and c=y^(2/6) to d=(16-y^2)^(1/2) for y. I graphed the region of integration and that still doesn't really help me. i got approximately 7.9 for the

164. ## Spelling

I'm sorry I typed the question wrong. The question is: Make three cluster words using f l

165. ## math

how do u put in writing to explain a array to find 4 times 13

166. ## college Algebra

If y varies directly as x^2 and y=20 when x=4, find y when x=7?

167. ## Science

How does a periscope work when it has 2 mirrors and light? A.Lenses refract the light B.Light bends as it travels and mirrors bend the light more C.Light travels in a straight line and the mirrors reflect the light D.Lenses and mirrors reflect the light

168. ## Art

for my art homework my teacher has set me to create a poster to promote my locatility and im not shore how to do it. e.g Eastbourne i have to do it on

169. ## statistic 125

have three coins, two of which are fair and the other is a double header .suppose a coin is selected using random selection and tossed twice,one after the other.if i got two heads what is the probability that the coin that was selected was the double

170. ## Spelling

The homework question that I just posted at 7:03pm is for a kindengarden.

171. ## Algebra

Which statement describes how to find the nth term in the sequence? 15, 32, 49, 66, 83, ... A. subtract 2 from 17 times the term number B. add 2 times the term number and 15 C. add 2 and 17 times the term number D. subtract 17 times the term number from 15

172. ## PreAlgebra

If X = 2 inches, Y = 4 inches, and Z = 4 inches, what is the surface area of the box? A. 32 inches2 B. 64 inches2 C. 48 inches2 D. 88 inches2

173. ## income tax

On July 15, 2009, Travis purchased some office furniture for \$20,000 to be used in his business. He did not elect to expense the equipment under §179 or bonus. On December 15, 2011, he sells the equipment. What is his cost recovery deduction for 2011? A.

174. ## Math

Probability Review , How many different numbers can you make with the digits 2,3,and 4 if you can use each digit as many times as you want?

175. ## Psych

I have a test that accurately predicts who will learn statics quickly. My test has a. predictive validity but not reliability b. content validity but not predicitive validity c. predictive valisity and reliability d. neither validity nor reliability

176. ## English

The last exercise was a comprehension I downloaded from the internet site you suggested to me. (esl-lounge) I just wanted to know if my answers were correct. 3. The first time I ever met Clare, she was working in a clothes store in Chicago. I was feeling

177. ## math

Simplify. (-3u)^5

178. ## algebra

What is the value of n in the equation 12n + 8 = 11? Please submit your answer as a reduced fraction.

179. ## Physics

Roads seldom go straight up a mountain, they wind back and forth. Explain why this is useful

180. ## Physics

A blue whale materializes 11.5 km above an airless planet with an acceleration of gravity of 6.85 m/s2. What is the speed of the whale right before impact? (Work-Energy Theorem)

181. ## Physics

1. How is it that you could list five different speeds you are going at this moment? 2. A ship with a mass of 1.0 x 10^4 kg has engines capable of an acceleration equal to - 2 m/ s^2. Suppose the ship approaches the dock at a speed of 20.0 m/ s. How much

182. ## physics

How does an incandescent light bulb produce light?

183. ## phy

How much work is done by the motor in a CD player to make a CD spin, starting from rest? The CD has a diameter of 12.8 cm and a mass of 15.7 g. The laser scans at a constant tangential velocity of 1.23 m/s. Assume that the music is first detected at a

184. ## p

A weightless rod, with length d = 5.5 m, supports three weights with masses m1 = 3 kg, m2 = 14 kg, and m3 = 4 kg as shown. Where is its center of gravity?

185. ## English

Can you please check my sentences? Thank you. 1) I've been out for lunch. I've written a lot of tests at school. I've spent a lot of time revising for my English test. 2) I've bought a new lap top computer. I've participated in an athletic competition. 3)

186. ## to writeacher

do you know anything about writing

187. ## Social Studies

Explain the effects that the Iron Curtain had upon Europe in the years after 1955

188. ## Algebra

A line goes through points (-5,12) and (1,3). What is the slope of the line?

189. ## ALGEBRA

SOLVE BY ALGEBRAIC METHOD Y=3X 1/3X + 1/2y =11

190. ## Math

A department store purchases a dress for \$50. To sell the dress to customers, the price is marked up by 15%. You hand the clerk \$70. How much change will you get back?

191. ## ALGEBRA

You have 480 grams of a radioactive kind of tin. If its half-life is 10 days, how much will be left after 30 days?

192. ## Psych

If an iq test has high predictive validity, then a. a psychologist can accurately guess what score someone will get before he or she has started the test. b. students who get good score on the test will get even better scores if they take the test again c.

193. ## algebra

Which inequality best represents the problem? The length of a rectangle is (x - 2) and its height is 67. The length is less than the height.

194. ## physics 30

A charged particle with mass m, and a charge q, is moving through a perpendicular magnetic field of strength B at a velocity,v. The particle is deflected through a curved path with a radius of 15.0 cm. If the speed of the same particle is doubled and the

195. ## chemistry

Calculate the pH when 75.20 mL of 0.114 M HCl is titrated with 0 ml of 0.108 M NaOH

196. ## Physics

As you lift a chair to store is upside down on a desk, gravity exerts a force, mg, downward and you exert a force of the same magnitude upwards. The two forces are equal in magnitude and opposite in direction. From this is would appear that no work was

I'm not sure what these questions mean and I have to answer them for homework ¿Qué necesitas para comer en cereal?does this ask what I need to eat cereal-like a spoon , bowl etc? 2. ¿Qué ríes mucho cuándo miras a los payasos?Do you laugh alot when

198. ## physics

What is the efficiency of a block and tackle that lifts a 500N resistance a height of 1m when an effort of 80N moves through a distance of 10m? What is the input work? output work?

199. ## pcm

sir ple. tell me how to make 9v dc motor how many coil turns i have to make.

200. ## Law

I am studying law and I want to know how to file a complaint against someone in the DA's office??

201. ## math

h worked the following problem incorrectly. Part 1) In which line was the mistake made? Part 2) Show your work and give the correct answer? Line 1 40 ÷ 5(3 − 1) − 4 Line 2 40 ÷ 5(2) − 4 Line 3 40 ÷ 10 − 4 Line 4 4 − 4 Line 5 0

202. ## Pre-cal

Does the equation x^2+x-12/x+2 have holes?

203. ## statistics

we need to estimate the percentage of businesses that plan to hire additional employees in the next 60 days. How many randomly selected employers must we contact in order to create an extimate in which we are 98% confident , with an error of 5%

204. ## nursing

what is the significance of HIPPA regulations to healthcare information management

205. ## to ms.sue or wrieacher

today we are coming up with 5 fractions that has 3 different prime numbers. will 56/84, 93/99, 45/65, 73/64, or 84/92 work. which one? P.S- can you be my private tutor? If you say yes, can we you help me every Fridays at 4:00. If Im not online on Friday at

206. ## physics

A roller coaster (425 kg) moves from A (5.00 m above the ground) to B (28.0 m above the ground). Two nonconservative forces are present: friction does -2.00 104 J of work on the car, and a chain mechanism does +3.00 104 J of work to help the car up a long

207. ## math

At a fair malina ays a game in which she tosse a coin and then spins a spinner that has 5 different colors.How Many possible outcomes are there for malina?

208. ## Does this make sense?

Puddles splashing against my feet Does that make sense? (especially the word "against") Is there a better way to write/phrase that?

209. ## MATH

IF 12 OUT OF 27 STUDENTS HAVE DOGS HOW MANY DOGS WOULD ONE STUDENT HAVE?

210. ## to writeacher

i read matthew's post earlier. what is the partnership thing up to friday. how can i join. well i am in 4th grade, but i want to start getting myself encouraged.

211. ## Spelling

The homework assignment is first the child has four spelling words to write five times and memorize and then the homework assignmen says make three clusters of words using fl for example fly.

212. ## Social Studies

We're doing a Civil War Project and my person is Charles C. Ward Can anyone help me find information about him with a picture?

213. ## algebra

When you solve a system of equations by the substitution method, how do you determine whether the system of equations is inconsistent?

214. ## math

mario took inventory of fish food in his store. there were 1 5/8 pounds of goldfish food, 9/16 pounds of beta food, and 17/20 pounds of tropical fish food. about how many pounds of fish food were there in all? 3 pounds 2 1/2 pounds 2 pounds 1 1/2 pounds

215. ## Math

81a2 + 36a + 4 factor

216. ## chemistry

1. Divide the ions below into 2 groups, those that tend to form soluble compounds and those that tend to form insoluble compounds. (〖Pb〗^(+2), 〖Na〗^+, 〖Nh4〗^+, 〖Ag〗^+, 〖NO3〗^-, 〖OH〗^-, 〖Cl〗^-, 〖CO3〗^(-2), 〖PO4〗^(-3)) 2.

217. ## Physics

Kenya finally loses her cool and punches her teacher. The teacher weighs 85 kg. He sees the punch coming and begins to back up at a speed of 0.60 m/s. After Kenya clocks him, he is moving backwards at a speed of 0.82 m/s. If the contact time of Kenya's

218. ## Calculus and vectors

Could someone explain to me how I can find the area/perimeter/volume of a rectangular prism if I am given R^3 points. For example find area of rectangular prism given pts (2,3,4)(5,3,2), similar to this.

219. ## Math

Ways to make 1/4

220. ## English

Writeacher, I can't vary the sentence, I just have to say which one is correct. Paris, which I visited last year, is one of the most romantic places in which I have ever been/I have ever been to. (I have to determine whether the correct preposition is IN

221. ## Math

Factor 15a^5-5a^2

222. ## trig

Determine the least positive value of t for which d=0. d=cos((3pi/4)(t)) 0=cos((3pi/4)(t)) I got stuck on this step Please help

223. ## math

If a rectangular has 54 feet im volume and 6 feet im im length and 3 feet in width what is the height

224. ## math

dina made 13 book covers she used nearly 3 feet of paper for each cover. about how much paper did she use in all?

225. ## Trigonometry

solve Sinx=Cos2x-1 for 0¡Üx

226. ## double integrals

Combine the following two integrals into one by sketching the region, then switching the order of integration. (sketch the region) im gonna use the S for integral sign..lol SS6ycos(x^3-3x)dxdy+SS6ycos(x^3-3x) And the first integration limits for x are

227. ## AP Prep World history

Can someone please help me write a comparison essay on the Roman Empire and Han Dynasty? I need 2 similarities (paragraphs) and 2 differences (2 more paragraphs). I was thinking for a similarity that both empires were attacked by Germanic tribes.

228. ## Spelling

What does it mean when the homework says: Make three F L cluster words example fly?

229. ## ALGEBRA1

Consider the equation 4x + 6y = 48. Part 1: On your own paper, graph this equation using the slope-intercept method. In the space provided, explain, in words, each step of the procedure you used. Part 2: On your own paper, graph this equation using the

230. ## Math

Write a list of 5 numbers that have a median of 71,300.

231. ## Algebra

Find the zero of f(X)= (x-5)/(x+2)

232. ## social studies

Who led each army in war? South_____________ North Winfield Scott

233. ## social studies

The South was known as the__________. The North was known as the__________.

234. ## English

Writeacher, as to sentence 2 should I stick to the present perfect? Paris, which I visited last year, is one of the most romantic cities TO WHICH I've been in which I've been (is a mistake) which I've been to I've been to I've visited. where I've been (I

235. ## nutrition

Making a transceiver from sccrtah is a pretty awesome project. It can take a while, though.There's a lot of theory of operation that factors in physics and engineering.I'm a radio technician, so I'm biased, but if I were a science teacher I would be amazed

236. ## PHYSICS*****

Two forces parallel to the x axis do 18.1 J of work on a small tray while moving it 21.8 m in the x direction across a gym floor. One of the forces has a value of +3.69 N in the x direction. What is the other force?

237. ## physics 30

A magnet dropped through a vertical solenoid will fall at a rate that is slower than gravity, and will induce an electric current within the solenoid. which physics principle explain these phenomena ?

238. ## Math

A sheet music cabinet is 1.4m wide, 45 cm deep and 1.5m high. What is the surface area of the cabinet, not including the open front? Express your answer to the nearest tenth of a square metre.

239. ## MATH

12 DOGS IN THE PARK 2 OF THEM WERE DAMATIANS WHAT FRACTIONS WERE DALMATIANS

240. ## Biology

List 3 features of catalysts.

241. ## chemistry

are compressive strength and brittle the same thing..if not then what is the difference?

242. ## chemistry

Given 2.00L of a buffer containing 0.338 M CH3COOH and 0.093 M CH3COONa. Ka(acetic acid) = 1.8 x 10-5. Calculate the pH after the addition of 0.004 moles NaOH.

243. ## Chemistry

Ok i need a little help. I have the answer to this question but i need to know how the teacher got the answer. How many grams of water are in a 100g of a 30% sugar solution? My answer is 70.

244. ## math

the problem is -9x+1=-80. At the end I cant figure out if it is a negative or positive?

245. ## chemistry

Fe + K2CO3

. Which of the following best describes this sentence from a congratulations message? Congratulations on your well-deserved promotion to Vice President of Operations! (Points: 5) Sincere and enthusiastic Selfish-sounding Wordy and stuffy Obviously

247. ## math

At a fair malina ays a game in which she tosse a coin and then spins a spinner that has 5 different colors.How Many possible outcomes are there for malina?

248. ## math

When px^3 – 2px^2 + 3x – p is divided by (x – 1), the remainder is -5. Find p.

249. ## math

Let f(x) = ax^3 + bx^2 + 3x – 4. If f(x) is divided by (x – 2), the remainder is 2. When it is divided by (x – 1), the remainder is -2. Find a and b.

250. ## MATH

SUBTRACT 4 4/7 AND 3 2/3

251. ## Geometry

How do I find the area of a right triangle with a hypotenuse that measures 39 cm anad a leg that measures 15 cm?

252. ## to allison

list of words with Fl or Fl in it: flat flood floss flesh inflate fly flying flution flap flames flame flavor flavors flight flights fleas floor flip flips flock I hope that works. if you need more help. post me .im a 4th grader

253. ## chemistry

Calculate the pH when 75.20 mL of 0.114 M HCl is titrated with 0 ml of 0.108 M NaOH

254. ## help

how do you learn a different language in a month

256. ## Physics

Bryant is fired from a cannon with an initial speed of 14 m/s. If his mass is 80 kg what is his initial kinetic energy?

257. ## Calculus I

Find the derivative of f(x) = sin^2 (e^sin^2 x) I wonder if I'm right F'(x) = 2cos(e^sin^2 x) (sin^2 x e^sin^2 x -1)

cos(3x)=-1

259. ## fractions

If you have 27 photos you give someone 1/3 and another person 2/3 how many do you have left?

260. ## Algebra

If you have a rectangle and increase the length by 20% while decreasing the with by 20% what is the change equated at?

261. ## physics 30

Draw a scenerio with a magnet and the solenoid below that would induce a flow of electrons to the right of the page in the ammeter, as shown below.

262. ## English

Can you check this sentence, please? Thank you. Imagine to be a competitor in the Ten Tors Challenge. Refer to what you will wear and the things you'll bring with you on the challenge.

263. ## science

True or false, at 25 degrees celsius H+ ion concentration in pure water is 7 x 10^ -7 mole per liter?

264. ## Trig

Solve Sinx=Cos2x-1 for all values between 0 and 2pi

265. ## History

I'm doing a project on name change in south africa so I'd like to know why the name pretoria was changed to tshwane and why did they change it to tshwane??? and why Pietersburg was changed to polokwane and why did they change it to polokwane

266. ## to ms.sue

today we are coming up with 5 fractions that has 3 different prime numbers. will 56/84, 93/99, 45/65, 73/64, or 84/92 work. which one? P.S- can you be my private tutor? If you say yes, can we you help me every Fridays at 4:00. If Im not online on Friday at

267. ## histroy

I'm doing a project on Name changing so I'd like to know what are the financial implications of a name change? And what are the practical implications of a name change

268. ## to ms.sue

today we are coming up with 5 fractions that has 3 different prime numbers. will 56/84, 93/99, 45/65, 73/64, or 84/92 work. which one? P.S- can you be my private tutor? If you say yes, can we you help me every Fridays at 4:00. If Im not online on Friday at

269. ## physics

explain how low temperatures are produced using adiabatic demagnetisation

271. ## Algebra

Explain the ways to factor ax^2+bx+c=0 and show examples. Thanks!

272. ## algebra

solution set for 9r+19r=56

273. ## math

They say that 2+2 can equal 5.How?

274. ## anthropology

is the changing American belief from tanned skin being healthy to tanned skin being related to skin cancer is an example of culture being: cumulative. diffusive. adaptive.

275. ## Algebra 2

(4x^4-4x^2-x-3)divided by(2x^2-3) quotient an remainder?

276. ## information literacy

paleobotany, which of the following terms listed as boarder term? paleontology, palynology, paleoclimatology, or phytogeraphy

277. ## maths

i am a product. one of my number is 10. the other is 5 more than the first number. what number i am?

278. ## math

Simon bought 6 and 1 half boxes of dounuts for his class party. each whole box contains 10 dounuts. how many dounuts did simon bring to his class?

279. ## algebra 1b

please help A sample of 127 firecrackers contained 8 duds. How many duds would you expect in a sample of 2413 firecrackers, how many duds would you expect in a sample of 2413 firecrackers

280. ## health

Need help in answering this question How do physical changes during old age impact on the client?

281. ## College Algebra

if y vaires directly as x^2 and y=20 when x=4, find y when x=7?

282. ## Algebra 2

(3x^4-2x^3+4x-5) divided by (x^2+4) quotient and remainder

283. ## Trig

4sin^(2)x-3=0