# Questions Asked onDecember 17, 2012

1. ## Biology

Suppose you are a scientist trying to help people who cannot produce an enzyme needed for proper digestion. How could you use genetic engineering techniques to make transformed bacteria that produce the enzyme?

2. ## Physics

Two 0.4 kg soccer balls collide elastically in a head-on collision. The first ball starts at rest, and the second ball has a speed of 3.5 m/s. After the collision, the second ball is at rest. A.) What is the final speed of the ball? B.) What is the kinetic

3. ## math-calculus

A spherical party balloon is being inflated with helium pumped in at a rate of 12 cubic feet per minute. How fast is the radius growing at the instant when the radius has reached 1 ft?

4. ## English

36. Identify the underlined part of speech. “Dolley Madison, the wife of the fourth United States president, is one of history’s many interesting women.” A.)pronoun B.)adjective C.)adverb D.)interjection I have no idea. Please help.

5. ## Biology

The matching strand to the one in Figure 12-7, reading from the bottom up, would be??? the figure is (from the bottom up) T C G A please help im so lost. :(

What are goals of science? Choose all that apply. A)to investigate the natural world. B)to establish unchanging facts. C)to explain natural phenomena. D)to make useful predictions based on evidence. I think a and d but im not entirely sure...

7. ## physics

An automobile of mass 1.46 E3 kg rounds a curve of radius 25.0 m with a velocity of 15.0 m/s. The centripetal force exerted on the automobile while rounding the curve is?

8. ## Math Calculus

The number of portable CD players you are prepared to supply to a retail outlet every week is given by the formula: q = 0.1p2 + 2p where p is the price it offers you. The retail outlet is currently offering you \$50 per CD player. If the price it offers

9. ## Pysics

A hot, just minted copper coin is placed in 112g of water to cool. The water temperature changes by 8.58 C and the temperature of the coin changes by 80.0 C. What is the mass of the coin? Disregard any energy trans to the waters surroundings and assume the

10. ## English

27. In the story “In the Shadow of War,” why did Omovo refuse money from the soldiers? A.)He was loyal to the woman who wore the black veil. B.)The soldiers did not offer enough. C.)His father told him to never accept money from strangers. D.)He did

11. ## Chem 2

what mass of Iodine(I2) must be used to prepare a .960m solution if 1000g of ethanol (C2H5OH0 is used?

12. ## ss

4. Which of the following was NOT true of the Battle at New Orleans? It was a decisive victory. It signaled a change in strategy for the British. It made future president Andrew Jackson a hero. It was fought after the peace agreement between the Americans

13. ## maths --plse help me..

How many cubic centimeter of iron is required to construct an open box whose external dimensions are 36cm,25cm, and 16.5 cm provided the thickness of the iron is 1.5cm. If one cubic cm of iron weighs 7.5g find the weight of the box.

14. ## Spanish

CHECK? ANswers on bottom: A. Choose the correct preterite tense conjugation. t� (dar) das dabas diste B. Choose the correct imperfect tense conjugation. las gatas (ir) iban van fueron C. Choose the correct preterite tense conjugation. Juan (dormir)

15. ## Math

Will, Micah and Sue went to dinner. Will paid 1/3 of the dinner bill. Micah and Sue paid in the ratio 2:5. If sue paid \$6 more than Will, how much did the dinner cost? Go step by step how to do this problem

16. ## Chemistry..

A compound whose empirical formula is NO2 could have a molecular mass of what? a) 23 b)39 c)92 d)120 0 please explain and show your work.....

17. ## Chem 2

How many grams MgCl2 will be formed from 25.6 mL of a 0.100M HCl solution reacting with excess magnesium metal

18. ## chemistry

A 100 g sample of an unknown liquid absorbs 2000 J of heat energy, raising the liquid’s temperature from 50 ◦ C to 70 ◦ C . What is the speciﬁc heat capacity of this liquid? No phase change took place.

19. ## Chemistry - Heat Capacity

When a 3.25 g sample of solid sodium hydroxide was dissolved in a calorimeter in 100 g of water, the temperature rose from 23.9 C to 32.0 C. Calculate delta H (in kJ/mol) of for the solution process: NaOH (s) -> Na+(aq) + OH-(aq) Use a calorimeter heat

20. ## chemistry

How much heat is necessary to change a 52.0 g sample of water at 33 degrees celsius into steam at 110 degrees celsius?

21. ## Chem 2

What is the molarity of a solution composed of 8.210g of Potassium Chromate (K2CrO4),dissolved in enough water to make .500 L of solution

22. ## English

In the following sentence, what kind of phrase is “to the library”? “I will be going to the library soon.” A.prepositional B.participial C.infinitive D.gerund I think it is A

23. ## math

Robbie needs to buy fencing for his square vegetable garden that measures 16 3/4 feet on a side. One side borders the back of the garage. The fencing costs \$4 per feet. Estimate how much the fencing will cost. I NEED HELP!!!!!

24. ## physics

A heat pump has a coefficient of performance of 4.5. If the heat pump absorbs 46.1 cal of heat from the cold outdoors in each cycle, what is the amount of heat expelled to the warm indoors? (in cal) tried everything but got nothing.

25. ## math

The product of two consecutive odd integers is 35. Find the integers

26. ## Math

Jessica purchased a bag of cat food. She feeds her cat 1 cup of cat food each day. After 7 days, she has fed her cat 2/3 of the food in the bag. How many cups of food were in the bag of cat food when Jessica bought it?

27. ## physics

In a circus performance, a monkey on a sled is given an initial speed of 3.9 m/s up a 17 ◦ incline. The combined mass of the monkey and the sled is 18.1 kg, and the coeﬃcient of kinetic friction between the sled and the incline is 0.34. The

28. ## English

Read the passage below and choose the answer that best describes the result of the honest man’s decision. “The honest man could hardly object to such reasoning. He took to going out in the evening and coming back the following morning like they did,

29. ## Biology

Suppose that a species of toads is introduced into a new environment in an attempt to reduce the population of insects. The toad has no natural predators in the new environment. The toad population would most likely? A)increase exponentially. B)increase

30. ## science

A gas is confined to a cylinder under constant atmospheric pressure, as illustrated in the figure below. When 0.46 kJ of heat is added to the gas, it expands and does 186 J of work on the surroundings. What are the values of ÄH and ÄE for this process?

31. ## Math

six friends share 5 small pizzas. Each friend first eats half of a pizza. How much more pizza does each friend need to eat to finish all the pizzas and share them equally?

32. ## probability

1. 52% of adults say chocolate chip is their favorite cookie. 40 adults are randomly selected and ask their favorite cookie. Find the probability that a) at most 15 people say chocolate chip is their favorite cookie. b) at least 15 people say chocolate

33. ## Chem 2

What mass of water must be used to make a 1.35m solution that contains 8.20 moles NaOH?

34. ## Math

You have 2/3 bag of flour. Use 3/4 of the flour to make cookie dough. How much of the entire bag do you use to make cookie dough?

35. ## chemistry

A 100 g sample of a liquid with a speciﬁc heat of 2 J/g · C absorbs 4000 J of heat energy. If the sample started at 30 ◦ C , what is the ﬁnal temperature? No phase change took place.

36. ## math

a kayak travels 15/h in still water and if the current flows at a rate a 3km/h how long will it take for the kayak to travel 30km upstream

As a result of the honest man’s decision to NOT steal, __________ A.everyone else became richer. B.everyone else became poorer. C.some citizens became rich and some became poor. D.stealing increased. I think it is B or C

38. ## chemistry

the student's lab manual says to mix some of his CaCl2 solution with an aqueous solution of sodium carbonate (Na2CO3). What evidence of a chemical reaction would he expect to see?

39. ## Physics

A plane is heading south with a velocity of 150 kilometers/hour. It experiences a tailwind with a velocity of 20 kilometers/hour. Find the resultant velocity of the plane

40. ## Math

There are 18 bottlenose dolphins at an aquarium. One sixth of the bottlenose dolphins are not adults. How many of the bottlenose dolphins are not adults?

41. ## Chemistry

What mass of glycerin (C3H8O3), a nonelectrolyte, must be dissolved in 400.0 g water in order to give a solution with a boiling point of 103.50 C?

42. ## Stats Repost

Your mathematics instructor claims that, over the years, 88% of his students have said that math is their favorite subject. In this year's class, however, only 21 out of 32 students named math as their favorite class. The teacher decides to conduct a test

43. ## physics

a crate mass 20 kg is being pushed by a person with horizontal force of 63 N, moving with a constant velocity [E]. find the force of kinetic friction.

44. ## capitalization

my mother always uses tide laundry detergent.

45. ## Chem 2

What is the molal concentration of a solution made by dissolving 34.2g of sucrose (C12H22O11) (molar mass 342.34)

46. ## Chemistry..

The empirical formula of a compound is CH2. The molecular formula of this compound could be which of the following? a) CH4 b) C2H2 c) C2H4 d) C2H6

47. ## math

Mrs. Jones bakes pies. She always cuts each pie into 8 slices. There are 13 slices left on the counter. Write the number of pies on the counter as a mixed number and as an improper fraction. Please help.

48. ## math

There are two 100-foot poles. A 150-foot rope connects them at the top. The bottom of the rope hangs to 25 feet from the ground. How far apart are the poles?

49. ## Science

A skier of mass 75 kg accelerates from rest down the slope as shown in the diagram (It's a triangle with a height of 300 m, length of 400 m, and the hypotenuse is 500 m; The skier is on the hypotenuse. At the bottom of the slope, he is travelling at 40

50. ## Statistics

A computer repair service found that a random sample of 45 repair costs had a mean cost of \$659. Assume that the population standard deviation is \$125. Calculate the margin of error, E, for a 95% confidence interval for the population mean µ.

51. ## College Algrbra

Given the following quadratic equation, find a. the vertex b. the axis of symmetry. the intercepts d. the domain e. the range f. the interval where the function is increasing, and g. the interval where the function is decreasing h. Graph the function

52. ## social studies- check

Why did shipbuilders choose coastal locatios such as Portsmouth for shipbuilding. Shipbuilders chose coastal location such as Portmouth for shipbuilding becuase its t=near the oceans and they could test the ships for sailing???

53. ## Physics

An engine moves a motorboat through water at a constant velocity of 22 meters/second. If the force exerted by the motor on the boat is 5.75 × 103 newtons, what is the power of the motor?

54. ## algebra 1

1)write an inequality a. the sum of three times a number and 2 lies between 7 and 14 b.seven less than 4 times a number is at most 44 and at least -24. 2)which is not a solution of -4 is less than or equal to 2-6x less than or equal to 8. 3) 2x-1

55. ## science

An experiment calls for you to use 100. mL of 0.91 M HNO3 solution. All you have available is a bottle of 5.00 M HNO3. How would you prepare the desired solution

56. ## Calculus

A spherical party balloon is being inflated with helium pumped in at a rate of 12 cubic feet per minute. How fast is the radius growing at the instant when the radius has reached 1 ft?

57. ## math i don't get it

If 6 equilateral triangles are placed side by side so that only two sides of each triangle touch one of the other triangles, what shape is formed? Please explain the answer.

58. ## math i don't get it

Scotty and his dad are repairing the railing along the side of the deck. They put up eight supports with 4 feet between each one. If the first support is at one corner of the deck and the eighth support is at the other corner, how long is the side?

59. ## Science

If you are asked to determine an object’s speed, what information must you have? A.distance and period of time B.distance and change in position C.period of time and direction D.distance and direction

60. ## physics

Jen pushed a box for a distance of 80m with 20 N of force. How much work did she do?

61. ## physics

A hunter wishes to cross a river that is 2.0 km wide and that flows with a speed of 5.1 km/h. The hunter uses a small powerboat that moves at a maximum speed of 12.3 km/h with respect to the water. What is the minimum time necessary for crossing?

62. ## chemistry

Butene H2C=CH-CH2-CH3 can be reacted to form isotactic polybutene (PB). (a) Would you expect isotactic polybutene to melt at a higher or lower temperature than atactic polybutene of the same molecular weight? Higher T Lower T (b) Is isotatic polybutene a

63. ## Statistics

An economist found that a random sample of 42 high school teachers had an average annual salary of \$56,490. A previous study showed that the population standard deviation is \$4150. Find the 99% confidence interval for µ, the average annual salary of all

64. ## chemistry

(a) The phase diagram of the binary system, neodymium-scandium (Nd-Sc) is given below. There are two polymorphs in the solid state: α which is hexagonal close packed (HCP) and β which is body-centered cubic (BCC). Identify all phases present at points 1,

65. ## English

what are the advantages and disadvantages if King claudius and polopnius overhear Hamlet's "to be or not to be" speech?

66. ## Physics

You throw a 6.2 bowling ball down a bowling alley. The ball is in your hand for a distance of 1.5 meters. Its speed increases from 0 to 16m/s(36mph). How much force did you apply?

67. ## chemistry

if 2.0 x 10-5 mol of sparingly soluble Cu(IO3)2 can dissolve in 2L of a very soluble NaIO3 sol'n, what is the molar concentration of the NaIO3 sol'n? (Ksp=1.4x10-5 for Cu(IO3)2)

68. ## physics

A plane cruising at 251 m/s accelerates at25 m/s2 for 9 s.What is its final velocity?Answer in units of m/s

69. ## chemistry

Lead chloride dissolves in water according to PbCl2(s)↔Pb2++2Cl−(aq) The solubility in pure water has been measured to be 4.44 g⋅L−1. Calculate the solubility product of lead chloride in pure water. Your answer should be in units of molarity raised

70. ## maths --plse help me..

THERE IS A SMALL ISLAND IN THE MIDDLE OF A 100M WIDE RIVER AND A TALL TREE STANDS ON THE ISLAND.pAND q RE POINTS DIRECTLY OPPOSITE EACH OTHER ON THE TWO BANKS AND IN LINE WITH THE TREE.IF THE ANGLE OF ELEVATION OF THE TOP OF THE TREE FROM p AND q ARE 30

71. ## chemistry

The fictitious compound, pandemonium carbonate Pn(CO3)2 hase a Ksp=3.091×10−9 M3 in water at room temperature. Calculate the solubility of Pn(CO3)2 in an aqueous solution of 1.11 M pandemonium sulfate Pn(SO4)2 (aq). Express your answer in units of

72. ## Chemistry - Molecular Structure

What is the molecular geometry of a molecule with 5 outer atoms and 1 lone pair on the central atom?

73. ## Math

Write in expanded form 24,307,241 Is this correct 20,000,000+4,000,000+300,000+ 7,000+200+40+1

74. ## physics

A hockey player makes a slap shot, exerting a constant force of 31.4 N on the hockey puck for 0.13 s. What is the magnitude of the impulse given to the puck?

75. ## FRENCH

Look at the map of the Paris subway system map.Choose one of these destinations from Bastille. Tell your teacher how you would navigate the Métro to get to: Pigalle Le Musée d'Orsay L'Opéra I don't even know where to start :(

76. ## math

Write the verbal sentence as an equation.The difference of -4 times a number and 3 is 27.

77. ## Spanish;CHECK?

Please check; Answers on bottom: Preterite vs. imperfect 1? A. Choose between the preterite or the imperfect. 1. We wanted to buy the car. QuisimosQueríamos comprar el auto. 2. The man refused to speak. El hombre no quisono quería hablar. 3. They found

78. ## Math

The length of a rectangular garden is 4 yards more than the width. The area of the garden is 60 square yards. Find the dimensions of the garden.

79. ## science

What is itvbarnoeso unscrambled ?

80. ## Social studies

What does the Law of Supply state?

81. ## chemistry

The solubility of the fictitious compound, administratium fluoride (AdF3) in water is 3.091×10−4 M. Calculate the value of the solubility product Ksp.

82. ## geometry

triangle GMA is 30 degree-60 degree-90 degree. If m=26cm,find a and s.

83. ## math

The product of two consecutive positive even integers is 48. Find the integers.

84. ## physics

A river flows due east at 1.34 m/s. A boat crosses the river from the south shore to the north shore by maintaining a constant velocity of 11.3 m/s due north relative to the water.

85. ## Math For College Readiness

Simplify: y - 3 / y - 2 - y + 1 / 2y - 5 + -4y + 7 / 2y^2 - 9y + 10

86. ## Math

the shadow if a metre stick is 1.3m long when a students shadow is 2.0m long. How tall is the student?

87. ## maths --plse help me..

Find the difference of the areas of two segments of a circle formed by a chord of length 5cm subtending an angle of 90degree at the centre.

88. ## Statistics

If you roll a fair die 100 times and 35 of the rolls result in a six, what would be the probability of the outcome of a 2, P(2)? P(2) = 0.02 P(2) = 2 P(2) = 35 P(2) = 0.35

89. ## math

Do a two column proof. Given: HI=FG Prove: GH>FI If FGI is a triangle,and GIH is a triangle, and they both share a common side, GI, and FIH is a straight line, how do you prove the answer?

90. ## algebra 1

who is correct and why? chloe jonas 3

91. ## Statistics

Suppose the correlation between two variables is -0.57. If each of the y-values is multiplied by -1, which of the following is true about the new scatterplot? It slopes up to the right, and the correlation is -0.57 It slopes up to the right, and the

92. ## math

a wheel makes 4 7/12 revolutions per minute if it rotates for 39 minutes how many revolutions will it make in 39 minutes

93. ## Spanish;CHECK?

Check: Comprensión ¿En qué siglo los conquistadores conquistaron América? ¿Cómo se llama la capital antigua de Perú? ¿Qué animal fue importante para el éxito de los conquistadores? ¿Cuál país conquistó Hernán Cortés? ¿Cómo se llama el

94. ## chemistry

The monomer structure of polystyrene is shown below: (a) Would you expect polystyrene to be a stiff or a pliable polymer? 1)Stiff 2)Pliable (b) What kind of synthesis is used in the production of polystyrene from styrene monomers? 1)Addition polymerization

95. ## Chemistry

Lead chloride dissolves in water according to PbCl2(s)↔Pb2++2Cl−(aq) The solubility in pure water has been measured to be 4.44 g⋅L−1. Calculate the solubility product of lead chloride in pure water. Your answer should be in units of molarity raised

96. ## chemistry

How many Joules are required to heat 2 g of silver from 50 ◦ C to 70 ◦ C?

97. ## chemistry

Consider the gold-platinum system which has a value of delta w of -4250 J/mole; (a) Calculate the enthalpy of mixing for a solution of 10% platinum and 90% gold. Express your answer in units of kJ/mole.

98. ## chemistry

What is the pH of a solution prepared by dissolving 1.533 g HCl in water to make 420 mL of solution

99. ## chemistry

When compound A is heated with acid compound B forms. Ahas the formula C3H8O and B is C3H6. When Ais oxidized compound D forms that is further oxidized to carboxylic acid. What are compounds A, B, and C.

100. ## CHEMISTRY

The fictitious compound, pandemonium fluoride (PnF2) has a Ksp value in water of 3.091×10−9M3 at room temperature. Calculate the solubility of PnF2 in water. Express your answer in units of molarity.

101. ## chemistry

he solubility of the fictitious compound, administratium fluoride (AdF3) in water is 3.091×10−4 M. Calculate the value of the solubility product Ksp.

102. ## Matt

39. Write the equation of a line that is perpendicular to the given line and that passes through the given point. y + 2 = 1/3(x – 5); (–4, 3) A.)y = –3x + 15 B.)y = –3x – 9 C.)y = –4x + 3 D.)y = –1/3x – 11 I don't know how to do this.

103. ## child development

Pavlov and Watson are associated with: A. operant conditioning. B. schemata. C. self-actualization. D. classical conditioning

104. ## Math

The scale on a globe is 1/8 of an inch equals 125 miles. How many inches is the circumference of the globe if the diameter of the Earh is 7,926.41 mi?

105. ## distance problem

A car travels 20 km/h faster than a truck. The car covers 360 km in 3 hours less time than the truck.Find the speed of the truck. (kindly write the solution, thanks alot)

106. ## English

I'm not a native speaker of English so I have grammar problems. What are some ways that I can improve my grammar? Do reading grammar book help? Also, is there any way to improve my writing beside writing more? Thank you

107. ## Math

round to the given place 6.64 (tenths) 2.435 (hundredths) 6.753 (ones) 78.456 (tenths)

108. ## science

A bouncy rubber ball is dropped from a height of about a metre above the ground .it falls to the ground, bounces and then rises back to almost the height from which it was dropped. Describe the main energy transformations that take place from the point at

109. ## social studies

when whalers first began hunting, they used small rowboats and were able to find many whalers near the shore. Later, the whalers needed bigger ships, and their whaling trip lasted much longer. Sometimes, whalers were gone for many moths or even years.

110. ## math

If I can run 7 miles in 80 minutes. How many can I run in 56 minutes

111. ## Physics

Could someone help me with this, please. Thanks. The tension in a rope attached to a boat is 27.5 lb. The rope is attached to the boat 6.0 ft below the level at which the boat is being drawn in. At the point where there is 18.0 ft of rope out, what force

112. ## Intermediate Algebra

A ladder is leaning against a house. the distance from the top of the ladder to the ground is 12 feet, and the distance from the foot of the ladder to the house is 4 feet. how tall is the ladder?

113. ## Help!!

1. Samuel is 2/3 as old as his brother. In five years, he will be 3/4 as old as his brother will be. Find their present ages. a. If x = the brother’s age now, write an expression for Samuel’s present age in terms of x. b. Write an expression for the

114. ## math

there are 12 students in the orchestra, and two-thirds of them play the violin. How many students play the violin?

115. ## math

A scale model of a building is 8 in. By 12 in . If the scale is 1 in. = 15 ft, what are the dimensions of a actual building ?

116. ## Pysics

Brass is an alloy made from copper & zinc. A 0.55 kg brass sample at 96.7 C is dropped into 2.19kg of water at 4.4C. If the equilibrium temp is 7.0C, what isthe specific heat of wter is 4186 j/kg C. Answer in units of J/kg C

117. ## Math

42. How many solutions does the system have? 3x + 12y = 20 y = –x + A.)one B.)two C.)infinite D.)none I'm not sure what the answer is, I am bad at these.

118. ## math

I borrowed money from Joe. I spent 5.50 of it on lunch, and half of the rest on a present. To repay Joe, I borrowed 10.00 from Fred. If i started and ended with no money, how much did I borrow from Joe?

119. ## help math

A boat travels down the river in 3.0 hours. The return trip up river takes 3.6 hours. A one way trip down or up river is a distance of 23 miles. If the boat is traveling at maximum speed, what is the boats speed measured in waters with no current? You need

120. ## Calculus

Evaluate the integral by changing to spherical coordinates. The outer boundaries are from 0 to 1. The middle one goes from -sqrt(1-x^2) to sqrt(1-x^2) The inner one goes from -sqrt(1-x^2-z^) to sqrt(1-x^2-z^) for 1/sqrt(x^2+y^2+z^2) dydzdx I don't

121. ## physics

A 0.500 kg block is being slid, vertically up the chalkboard with an applied force of 6.00 N [upwards] and 2.00 N [inwards] (into the boards). If the coefficient of sliding friction is 0.400, calculate the accel of the block.

122. ## English

How do you write the compound predicate of: People studied coins, saw jewels, or examined ancient tools.?

123. ## language arts

“In the snow” is repeated three times in “Scott’s Goodbye.” What meaning might the writer have hoped to convey by repeating this phrase?

124. ## English

Hey, Yesterday I asked a question about "the" and Writeacher helped me a lot. But now I have a further question. I have a rule in my grammar book, which says, that Nationalities with the suffix -ese. -ch, -sh, -ss; goes with the. And wirteacher says that I

125. ## physics

A 2.6kggold bar at 90C is dropped into a 0.21kg of water at 23C. What is the finl temperature? Assume the specific heat of gold is 129 J/kg C. Answer in units of C

126. ## Physics

A hot, just minted copper coin is placed in 112g of water to cool. The water temperature changes by 8.58 C and the temperature of the coin changes by 80.0 C. What is the mass of the coin? Disregard any energy trans to the waters surroundings and assume the

127. ## math

Find two consecutive positive integers whose product is 72

128. ## Math

38. Tell whether the lines for the pair of equations are parallel, perpendicular, or neither. y = –2/3x + 1 2x – 3y = –3 A.)Parallel B.)Perpendicular C.)Niether I think it is C.

129. ## Math

A 20 meter ladder is leaning against a house.The bottom of the ladder is 15 meters away from the house. How far, to the nearest tenth, is the top of ladder from the ground? Do I multiply 20,x 15? I don't know how to do the problem

130. ## u.s history

what are Andrew Jackson's response for tariff of Abominations, states' rights doctrine, and Nullification crisis

131. ## chem

show the hydrogen bonding between two molecules of ethanol (C6H6O) . .??

A crowbar lever , with a 3 inch long nail remover connected to a 20inch handle. If you push down on the handle end with a force of 40 N, what force is available to remove a nail? HINT: a Crowbar isnt all that different from a seesaw, except the pivot is

133. ## Science

which of the following substances are poor conductors of thermal energy ( more than one answer) a: wood b: glass c: copper d: plastic e: iron f: fiberglass g: air

134. ## EArth Science

Give positive and negative effects of climate change in Canada..

135. ## college algebra

Given the following rational function, find a. the horizontal asymptote(s), b. the vertical asymptote(s), if any, and c. the oblique asymptote(s), if any. f(x)=(x^2-x-2)/(2x^2-x-10)

136. ## physics

Brass is an alloy made from copper & zinc. A 0.55 kg brass sample at 96.7 C is dropped into 2.19kg of water at 4.4C. If the equilibrium temp is 7.0C, what isthe specific heat of wter is 4186 j/kg C. Answer in units of J/kg C

137. ## Chemistry

Calculate the degree of polymerization n of polystyrene with a molecular weight of 3.091×106 g/mol.

139. ## chemistry

You wish to increase the carbon content of a slab of steel by exposing it to a carburizing atmosphere at elevated temperature. The carbon concentration in the steel before carburization is 223.0 ppm and is initially uniform through the thickness of the

140. ## Statistics

7. Most powerful business women in America. Consider that the data set is a normal distribution with a mean of 50 years and a standard deviation of 5 years. A powerful woman is randomly selected from the data, and her age is observed. Please calculate the

141. ## Math

7. Most powerful business women in America. Consider that the data set is a normal distribution with a mean of 50 years and a standard deviation of 5 years. A powerful woman is randomly selected from the data, and her age is observed. Please calculate the

142. ## Chemistry

2. A 3.37 gram sample of a nonvolatile nonelectrolyte ( no ions) is dissolved in 23.7 grams of hexane (C6H14) at 25.0 degrees calcius. The vapor pressure of pure hexane at this temperature is 438 tort, and the vapor pressure of the solution is 419.3 torr.

143. ## math

You offer to do the dishes for your family for the next month.This month has only 31 days. You suggest that they can pay you in one of three ways: A. \$0.50 each day.(I already did this;=\$15.50 a month. B.\$0.10 the first day,\$0.20 the second day,\$0.30 the

144. ## Geometry

If ABCD is a rectangle with center Z (where the diagonals bisect), and AC = 3x+11 and BD = 2x+31, what is x?

145. ## music

which genre of music was influenced by r&b, jazz, and pop?

146. ## health

Untreated depression will likely ________. A. Make depression go away B. Improve the outcome of other illnesses C. Delay recovery D. All of the above

147. ## English

My teacher wants me to reword"moving out of the" in this sentence ''Instead of moving out of the marriage''. I cant think of anything. pls help

148. ## Math

Jean surveyed 25% of all eighth graders and 75% of all 7th graders. John surveyed 50% of all eighth graders and 50% of all 7th graders at the same school. Jean surveyed a total of 152 John surveyed a total of 144 What is the number of eighth graders?

149. ## composition

Develop a “Welcome Letter” for the visiting students. Keep in mind that the students have not lived in the United States nor attended a U.S. college before. What do they need to know about making and keeping friends here in the U.S.?

150. ## spanish

supply the form of ser that goes with the following subjects el, nosotros, yo I need a few examples for help

151. ## English - Ms. Sue help

Help I don't understand Answer the following question about the essay “Escaping.” Give an example of one internal and one external conflict from the selection.

152. ## Calculus

Integrate ç (x^3)/ã((x^2)+4) dx

153. ## Physics

A car and a bus are moving down a hill, the bus is 3X heavier than the car and the speed of the car is 3X faster than the bus. Compare their momentum and K.E.

154. ## Math

Sorry I posed one before this and didn't finish the problem. 42. How many solutions does the system have? 3x + 12y = 20 y = –1/4x + 5/3 A.)one B.)two C.)infinite D.)none I'm not sure what the answer is, I am bad at these.

155. ## World Geography and History

The ideas of _____ _____ are the basis for communism.

156. ## Philosophy

I have a paper due and need help with this question. should we encourage population control by limiting family size? Just need someone to help me finish, not do it for me..just some help. Thanks. I. Introduction to the topic. • State the significance of

Given the following polynomial, find a. the zerros and the multiplicity of each b. where the graph crosses or touches the x-axis c. number of turning points d. end behavior f(x)=(x-1)(x-5) **please show work**

158. ## calculus

it says lim as x>-3 x+3/ x^2+7x+12 I need to find the limity using subsitution, a table, or by graphing...

159. ## science

during jefferson's presidency cities were

160. ## chemistry

A latex balloon, wall thickness 3.091 x 10-4 m, contains helium at a concentration of 0.55 kg m-3. Under these conditions the total surface area of the balloon is 0.78 m2. The diffusion coefficient of He in latex at room temperature is 4.9 x 10-9 m2s-1.

161. ## Chem:DrBob

Thank you for the informative answer yesterday. I hope you can help me with this one too. Thanks S(subscript 8) + O( subscript 2) -> SO3 Could you explain why it O3 when S valence is -2? Thanks

162. ## Earth Science to DAmon

Give positive and negative effects of climate change in Canada..

163. ## physics

Light is shone on a metal and photoelectrons are emitted. Can you tell me the three things from the listbelow which might cause the photoelectron emission to stop. Decreasing the intensity of the light Increasing the frequency of the light Decreasing the

164. ## Physics (easy level)

What would a Potential energy to velocity^2 graph be?

165. ## physics

An Otto engine has a maximum efficiency of 33.1 %; find the compression ratio. Assume that the gas is diatomic.

166. ## Essay title help

The title of my essay is: Love knows no Bounds Is it okay spelled like that? Do any other words need to be capitalized? Thanks.

167. ## math

gena wants to display her collection of 30 antique puppets in equal sized rows. what are all the combinations for displaying the puppet collection

168. ## Video games, entertainment

Is call of duty black ops 2 ok for kids?

169. ## Math

When the mean is greater than the median, what does it suggests about the data set?

170. ## chemistry

Given that the pH of a substance is 1.0, what is the [H+]? A. 0.0 mol/L B. .1 mol/L C. 2.4 mol/L D. 7.5 mol/L B

171. ## maths --plse help me..

The value of (₆√27-√27/4)^2 is:

172. ## Macbeth question?

Lady Macbeth says that the ghost of Banquo is of the same nature as the dagger Macbeth saw leading him to Duncan. How does she characterize Macbeth's weakness in this regard? How does she seek to push him from it? I'm having a very hard time with this

173. ## maths --plse help me..

A cuboid has total surface are 40cm^2 and its lateral surface area is 26cm^2.find the area of its base.

174. ## Algebra

Solve with a system of equations. Amanda pays 10.00 per month plus 100.00 Brita pays 20.00 per month

175. ## chemistry

Answer the following questions by referring to the Cu-Al phase diagram shown below. (a) What is the lowest temperature at which a liquid can be found in a system of any composition of Cu-Al? correct (b) A common alloy composition used in airplanes is 4 at.

176. ## Physics

A 608g sample of water at 77C is mixed w/429g of water at 23C. What is the final temp of the mixture? Assume no heat liss to the surroundings. Answer in units of C

177. ## English - ms. sue

ms. sue i also have to answer one question from story that be the story move from describing two similar friends to ones whose views become much different. it say what writer do to intensify contrast b/w the 2 to show that now each of us b by herself. I

178. ## language arts

I have to do a school essay but don't have a awesome intro please help!!! B.T.W it has to do with candy canes

179. ## Science 8R - help!

I need a definition for Lines of force (8th grade science regents level, ny)

180. ## physics

a 32g sample of copper is at 29C If 1502j of energy are added to the copper, what is the final temperature? Assume the specific heat of copper is 387J/KG C

181. ## Physics

Who originally designed the planetary model of an atom? Bohr or Rutherford

182. ## Degree

Is a Graduate school the same as a Professional school? Can you receive a masters degree from a Professional school?

183. ## maths --plse help me..

On a certain sum, C.I. is Rs 41 and SI is Rs 40. for 2 years. What is the rate p.a.

184. ## math

Mr. H gets the newspaper delivered every morning. it costs \$3.00 for 6 days delivery. what is the cost of the paper each day

185. ## maths

On a certain sum, C.I. is Rs 41 and SI is Rs 40. for 2 years. What is the rate p.a.

186. ## Math

Find all the three digit numbers where the sum of of the first two digits equals the third digit.

187. ## SOCIAL STUDIES

How has the legacy of the civil rights movement influenced our society to strive for equality for all american citizens

188. ## Law

What are some barriers of human rights in 2012? Specifically for: -Women -Immigrants -Aboriginal People -People with disabilities For women, I said that they are still paid less than men that do the same work.

189. ## Math

John says he can make three rectangles of different sizes each out of 16 tiles

190. ## Math

Reduce to lowest terms 4a3c --------- 6a2b

191. ## science

how is the troposphere important to the overall atmosphere?

192. ## Math

The teacher asked Laura to give each student 2/5 sheets of paper. If there are 20 students in the class how much paper did Laura pass out?

193. ## chemistry II

Calculate the grams in solute: 300 g of water in the preparation of 15.0% NaNO solution. Atomic Weight: Na=23,N=14,o=16.

194. ## math

Brayden bought 5 packs of dog treats. He gave 5 treats to his neighbor's dog. Now Brayden has 25 treats left for his dog. How many treats were in each pack. Explain how you know.

195. ## Math

Vf2=vo2+2a(xf=xo)

196. ## science

which of the following substances are poor conductors of thermal energy ( more than one answer) wood, glass, copper, plasttic, iron, fiberglass, or air

197. ## Math

Rank the following from greatest to least. 297.086, 297.8, 297.062 Is this correct 297.062, 297.086, 297.8

198. ## Science

what sends secretions in to the begin changing starches in to usable sugar?

199. ## Chemistry

A protein has a molecular weight of 98,300 grams/ mole. What will be the osmotic pressure if 0.128 grams of this protein I dissolved in 15.0 ml of water at 20 degrees calcias?

200. ## math

A student completed 44% on a test. He completed 22 question. Then how many questions are on the test

Given the following polynomial f(x)=(x-1)(x-5), find A.the zeros and the multiplicity of each one b. where the graph crosses or touches the x-axis c.the number of turning points d. the end behavior Please show work.

202. ## Lang ARTS

Stretching for 210 miles, the Thames is in England. (1 point) 1phrase 2gerund phrase 3participial phrase 4appositive phrase 5 preportional

203. ## story-telling

Can someone help me with storytelling. The theme is "My wacky winter break"

204. ## social studies

What important product comes from whales, and what is it used for?

205. ## Math

y - 15 3/5 = 2 1/3 y=? Simplest form

206. ## Math

4/5 • m = 7 m=? simplest form. please I really need help!

25 cents __?__ 3/10 of a dollar

208. ## math

in the symphony orchestra there are 4 rows of string players and 4 musicians in each row. there are also 5 rows of brass and reed players with 3 musicians in each row. how many string, brass, and reed players are there in the orchestra

209. ## Math

The container is 10 cm tall and holds exactly 60 cubes.The length of the cube is 2 cm.What is the volume of the container?

210. ## math quick help

Bernie put in a garden in her back yard. The garden has a perimeter of 195 feet. She wants to know the total surface area of the garden and all she knows is the perimeter and that the width is 20% or (1/5) of the length. (Remember 20% and the fraction 1/5

211. ## English - Ms. Sue help

what is the essay called escaping

212. ## social studies

To what extent do consumers in advanced nations have an effect on the labour issues in developing countries? I know that advanced nations do have an effect, but I need to write an essay on this question and I will need to provide evidence and cite my

213. ## Math

Name all the arrays you can make with 8 tiles

214. ## Math

A 20 meter ladder is leaning against a house.The bottom of the ladder is 15 meters away from the house. How far, to the nearest tenth, is the top of ladder from the ground? Do I multiply 20,x 15? I don't know how to do the problem

215. ## social science

Read the speech below. It is a fictitious political speech by Peter, a candidate for the upcoming national election. Then answer the following questions: List all of the arguments in the speech List all of the non-arguments in the speech List all of the

216. ## Fractions in simplest form

how do I find the simplest form of 2/3 + 2/9 ?

217. ## algebra

solve each system by elimination 9x-6y=-30 x-3y=6

218. ## U S Civics

Members of Congress are primarily responsible to whom? Would it be their constituents?

You know that the " home on the range" is " where the deer and the antelope play." However, on animal in north america fits the true classification of antelope. What does classification means A. Friendliness B. Kind of music C. Particular group D.

220. ## Math 208

N=0.04x-78.34 determine the year in which there were 1.9million inmates

221. ## math

Find the ending balance in an account that opens with \$6,000, earns 6.5% interest compounded quarterly, and is held for 20 years. (Round your answer to the nearest cent.)

222. ## math

3m +4 ___ =12 4

223. ## Math

Is 7 a complex number

224. ## PHYSICS PLEASEEEE HELP ME

Suppose a revolving door at the bank is spinning around once every 5 seconds. As you walk through, you push on the door for 2 seconds, which increases that rotational speed so that it rotates once a second. What was the Rotational acceleration due to your

225. ## College Algrbra

Given the following rational function, f(x)=x^2-x-2/ax^2-x-21 find (a) the horizontal asymptote(s) (b) the vertical asymptote(s), if any and (c) the oblique aasymptote(s) if any

226. ## math

Find the dimensions of a rectangle having an area of 10 square centimeters and whose width is 3 centimeters less that its length.

227. ## Math

find the actual rational zeroes for f(x)=4x^3-16x+17x-5

228. ## Math

-1/(x^3)-27 or -1=A(x^2+3x+9)+Bx+C(x-3) I'm trying to find the partial fraction decomposition. I think A=-1/21, but how do I find the right values to plug in for x to find B and C?

230. ## Chemistry

1. The organic compound triphenylmethane (C19H16) when pure melts at 171.04 degrees c. When 1.92 grams of hexachlorobenzene (C6CL6) is mixed with 3.74 grams of triphenhlmethane, the melting point of the mixture is 163.19 degrees calcius. Calculate the

231. ## math

1/4+2/3+4/24 need to show all work

232. ## Calculus

Find the area between the following curves y1= x2−4x+3 y2=−x2+2x+3

233. ## Math (Calculus)

Determine the arc length of the following on the specified interval: y=1/2x^3/2 , x=0, x=4

234. ## physics

A 608g sample of water at 77C is mixed w/429g of water at 23C. What is the final temp of the mixture? Assume no heat liss to the surroundings. Answer in units of C

235. ## Algebra 2

How do you find the domain and range from y=3x^3+4x^2-5?

236. ## math

what number makes the number sentence true?6 multiply 3 multiply 2=6 multiply 3 multiply 2

237. ## Chemistry..

60.0 g O2=___________molecules O2

238. ## economy

why is this website here?! this website makes people lazy we already are lazy

239. ## math

Bernie put in a garden in her back yard. The garden has a perimeter of 199 feet. She wants to know the total surface area of the garden and all she knows is the perimeter and that the width is 20% or (1/5) of the length. (Remember 20% and the fraction 1/5

240. ## science

What are the major parts of science?

241. ## Math

How do you find the domain and range from y=3x^3+4x^2-5?

242. ## Intermediate Algebra

(x)/((x+5)(x+6))-(5)/((x+5)(x+4))

243. ## math

what is nine and three fiths didvided by five

244. ## math

how far will a rock fall in 15 sec if it is dropped 150 feet above the river at an initial speed of 24 ft per sec

245. ## English - ms. sue

ms. sue have you read story small potatoes?

246. ## math

is x^5 a function?