# Questions Asked onJuly 16, 2013

1. ## chemistry

the vapor pressure of water at 45.0 °c is 71.93 mmhg. Calculate the vapor pressure of a solution of 1.50 m Al(NO3)3 at this temperature (assume 100% dissociation)

2. ## solubility

The Ksp of mercury II hydroxide is 3.60 x 10^-26. Calculte the solubility of this compound in g/L

3. ## Chemistry

Complete this table of initial and final concentrations HF(aq) + KOH(aq) KF(aq) + H20(l) Initial concentrations: HF-2.0M KOH-1.0M KF-0M Final Concentrations? how do I set this up to figure out the final concentrations? How can I tell which of the following

4. ## Consumer Math

The Smiths want to buy a 9 ft. by 12 ft. carpet and center it in a 15 ft. by 20 ft. room. What is the perimeter of the carpet?____feet

5. ## SCIENCE

The size, mass, and arrangement of atoms affect the density of a substance. If a substance has a low density, what can you guess about the size, mass and arrangement of the atoms that make up that substance?

6. ## physics

A wind turbine is initially spinning at a constant angular speed. As the wind's strength gradually increases, the turbine experiences a constant angular acceleration 0.170 rad/s2. After making 2870 revolutions, its angular speed is 131 rad/s. (a) What is

7. ## physics

A man holds a 194-N ball in his hand, with the forearm horizontal (see the figure). He can support the ball in this position because of the flexor muscle force , which is applied perpendicular to the forearm. The forearm weighs 24.7 N and has a center of

8. ## General Chemistry

When a solution of nickel (II) chloride is mixed with a stoichiometric amount of colorless sodium hydroxide solution, a green, gelatinous precipitate forms. (a) Write the balanced molecular equation and the net-ionic equation for this reaction. molecular:

9. ## physics

A star rotates in a circular orbit about the center of its galaxy. The radius of the orbit is 4.4 x 1020 m, and the angular speed of the star is 7.3 x 10-15 rad/s. How long (in years) does it take for the star to make one revolution around the center?

10. ## physics

An automatic dryer spins wet clothes at an angular speed of 4.4 rad/s. Starting from rest, the dryer reaches its operating speed with an average angular acceleration of 4.2 rad/s2. How long does it take the dryer to come up to speed?

11. ## physics

The drawing shows the top view of two doors. The doors are uniform and identical. Door A rotates about an axis through its left edge, and door B rotates about an axis through its center. The same force is applied perpendicular to each door at its right

12. ## physics

What mass would you hang on the right side of the system in the figure to balance it -- that is, to make the clockwise and counterclockwise torques equal? (Let x1 = 30 cm and x2 = 12 cm.)

13. ## physics

At the local swimming hole, a favorite trick is to run horizontally off a cliff that is 5.95 m above the water. One diver runs off the edge of the cliff, tucks into a "ball," and rotates on the way down with an average angular speed of 2.55 rev/s. Ignore

14. ## luella high

The area of a rectangle is 15 + 5y square feet. Which of the following expressions could be the lengths of the sides of the rectangle, in feet?

15. ## physics

what is the source of error occur in experiment Standing Waves (tuning fork)?

16. ## physics

A 0.44-kg block is hung from and stretches a spring that is attached to the ceiling. A second block is attached to the first one, and the amount that the spring stretches from its unstretched length triples. What is the mass of the second block?

17. ## english

Fill in the spaces with the correct form of the verb in present continues tense. Hey! Do you want to hear about what my family (do) ________ ________(1) right now? Well, I hope you do, because I am going to tell you! Right now, my dad (work) ________

18. ## physics

A hydraulic jack has an input piston with a diameter of 1.00 cm, and an output piston with a diameter of 6.00 cm. What weight (in N) can be lifted when a force of 45.8 N is applied to the input piston? Answer is 1650 N but I need someone walk me through

19. ## physics

One end of a meter stick is pinned to a table, so the stick can rotate freely in a plane parallel to the tabletop. Two forces, both parallel to the tabletop, are applied to the stick in such a way that the net torque is zero. The first force has a

20. ## physics

The drawing shows a uniform horizontal beam attached to a vertical wall by a frictionless hinge and supported from below at an angle θ = 38o by a brace that is attached to a pin. The beam has a weight of 346 N. Three additional forces keep the beam in

21. ## Vocabulary

Denotative definitions are also known as ______ definitions. A. connotative B. direct C. indirect D. None of the Above C

22. ## plane and trigonometry

a 30 foot flagstaff is fixed in the center of a circular tower 40 feet in diameter. from a point in the same horizontal plane as the foot of the tower the angles of elevation of the top of the flagstaff and the top of the tower is 30 degree repectively.

23. ## physics

A helicopter has two blades (see figure), each of which has a mass of 270 kg and can be approximated as a thin rod of length 6.7 m. The blades are rotating at an angular speed of 52 rad/s. (a) What is the total moment of inertia of the two blades about the

24. ## math

Mary can clean the house in 6 hours. Her younger sister Ruth can do the same job in 9 hours. In how many hours can they do the job if they work together?

25. ## physics

A 48.0 kg child is stationary in the middle of an ice rink (no friction). A 0.750 kg football is thrown with a velocity of 21.2 m/s moving eastward. The child catches the ball and together they slide off in the eastward direction with a velocity of 0.326

26. ## Trigonometry

The diameter of the wheel is 165 ft, it rotates at 1.5 revolutions per minute, and the bottom of the wheel is 9 ft above the ground. Find an equation that gives a passenger's height above the ground at any time t during the ride. Assume the passenger

27. ## general physics

A piece of metal, when weighed in air, has a weight of 20.7 N. When completely submerged in blood (ƒâ = 1060 kg/m3), the metal has a weight of 12.7 N. Based on the values from table 11.1 in the text, what is the most likely metal? Here is the answer but

28. ## math

Michael and Barry can complete a job in 2 hours when working together. If Michael requires 6 hours to do the job alone, how many days does Barry need to do the job alone?

29. ## statistics

Do students tend to improve their SAT mathematics (SAT-M) score the second time they take the test/

30. ## English

1. He can not solve the math problem. 2. He cannot solve the math problem. 3. He can't solve the math problem. 4. He could not solve the math problem. 5. He couldnot solve the math problem. 6. He couldn't solve the math problem. (Are they all grammatical?

31. ## physics

A spring lies on a horizontal table, and the left end of the spring is attached to a wall. The other end is connected to a box. The box is pulled to the right, stretching the spring. Static friction exists between the box and the table, so when the spring

32. ## Physics

A charged particle is projected into a uniform B-field. Its velocity vector is perpendicular to the B-field vector. What type of path will the particle travel? Neglect gravity. Answer straight line motion elliptical motion parabolic motion circular motion

33. ## physics

Two people start at the same place and walk around a circular lake in opposite directions. One has an angular speed of 2.46 x 10-3 rad/s, while the other has an angular speed of 7.91 x 10-3 rad/s. How long will it be before they meet?

34. ## algebra

Factor 16x^2 - 25

35. ## English

1. Last year, we had a school festival. I couldn't attend the school festival because of my illness. 2. Last year, we had a field trip. We couldn't enjoy the trip because of heavy rain. 3. Last year, we had a school talent show. We couldn't do well because

36. ## chemistry

Calculate the volume of gasoline, in liters, that you would add to your car's tank given that the density of gasoline is 0.66 g/mL and the mass of the gasoline is 1.2 kg.

37. ## physics

A Ferris wheel rotates at an angular velocity of 0.28 rad/s. Starting from rest, it reaches its operating speed with an average angular acceleration of 0.021 rad/s2. How long does it take the wheel to come up to operating speed?

38. ## stats

The following data were collected from a case-control study of breast cancer and fat intake: case control High-fat diet 10 5 Low-fat diet 40 55 50 60 Statistical inferences for odds ratios are based on the natural log of the odds ratio, rather than the

39. ## How to start your day care facility

Of the following models of education which one is more in use than all of the other models combined? A. Cognitive B. Development- Interaction C.Electic or Traditional D. Behavior Learning My answer is (A) Csomeone check my answer

40. ## physics

A tank contains mercury, whose density is 13 600 kg/m3. Find the force exerted by the mercury on a circular plug at the bottom of the tank. The plug has a diameter of 2.54 cm, and is located 37.6 cm below the surface of the mercury. The answer is 25.4 N

41. ## English

1. Turtle won the race. 2. Turtle won the race against Rabbit. 3. Turtle won the race with Rabbit. 4. Turtle beat Rabbit in/at the race. (Are they all grammatical? Would you correct any errors? And some more useful expressions? Thank you.)

42. ## Geomtry

A farmer has 1000 meters barbed wire with which he is to fence off three sides of a rectangular field, the fourth side being bounded by a straight canal. how can the farmer enclose the largest field?

43. ## physics

A boy with a mass of 35.4 kg comes running up behind his stationary father, whose mass is 105.3 kg. If the boy’s velocity before the collision is 8.20 m/s eastward, and his father’s velocity after the collision is 3.10 m/s eastward, find the boy’s

44. ## physics

A pitcher throws a curveball that reaches the catcher in 0.67 s. The ball curves because it is spinning at an average angular velocity of 340 rev/min (assumed constant) on its way to the catcher's mitt. What is the angular displacement of the baseball (in

45. ## Chemistry

I'm doing some post lab questions and I'm stuck on one. In lab we performed Tollens test, Fehlings test, and Jones Oxidation to differentiate our unknown between an aldehyde or a ketone. The question I'm stuck on is " older bottles of benzaldehyde are

46. ## Finance

Assume that you are the assistant to the CFO of XYZ Company. Your task is to estimate XYZ's WACC using the following data: 1.The firm's tax rate is 40%. 2.The current price of the 12% coupon, semiannual payment, non-callable bonds with 15 years to maturity

47. ## Physics

A man stands underneath a power line carrying a current of 150 A. If the power line is 15 m above the man, what is the magnetic flux density measured by the man (Neglect the Earth's magnetic field).

48. ## english

could you pl tell me the theme in edgar albert guest's equipment poem

49. ## physics

A planet orbits a star, in a year of length 4.46 x 107 s, in a nearly circular orbit of radius 3.17 x 1011 m. With respect to the star, determine (a) the angular speed of the planet, (b) the tangential speed of the planet, and (c) the magnitude and

50. ## Gen physics

A 55.0 kg high school baseball pitcher is holding a 149 g baseball as he slides horizontally on a frictionless surface with a velocity of +2.15 m/s, relative to the surface. He then throws the baseball with a velocity of +46.7 m/s relative to the surface.

asked by No clue on this one
51. ## physics

A fan blade is rotating with a constant angular acceleration of +8.4 rad/s2. At what point on the blade, as measured from the axis of rotation, does the magnitude of the tangential acceleration equal that of the acceleration due to gravity?

52. ## chemistry

the reaction is......CaCO3+2HCl---->CO2+H2O+CaCl2. what mass of HCl will be neutralized by 0.50g ofCaCO3? How do i figure this out in a non-complicated way??

53. ## physics

A person is riding a bicycle, and its wheels have an angular velocity of 28.9 rad/s. Then, the brakes are applied and the bike is brought to a uniform stop. During braking, the angular displacement of each wheel is 13.6 revolutions. (a) How much time does

54. ## math

It takes 1 and 3/4 hours to fill a new underground gasoline storage tank. What part of the tank would be fill if the gasoline had been shut off after 1 hours?

55. ## Chemistry

Sorry to post again but I'm really stuck on this one! I'm doing some post lab questions and I'm stuck on one. In lab we performed Tollens test, Fehlings test, and Jones Oxidation to differentiate our unknown between an aldehyde or a ketone. The question

56. ## Math.....

At 1:00 a.m., a homicide detective found the reading of a corpse's body temperature to be 88 degrees Fahrenheit. One hour later, the body temperature is 83 degrees Fahrenheit. If the body has been in a 74 degree Fahrenheit room since its death, what is the

57. ## math

In the number 13,407.036 there are two 3s. Explain how the values of the 3s are related. Thanks

58. ## Math

Find the solution set of the equation {x^2+y^2=34 {x+y=2

59. ## math

A plane is 11.9 miles off the ground as it makes its descent to land at the Metropolitan airport (46 miles away). The pilot aims the plane downward at a 12-degree angle. To the nearest mile, what distance will the plane have to travel in the air to land at

60. ## physics

An automobile tire has a radius of 0.335 m, and its center moves forward with a linear speed of v = 24.1 m/s. (a) Determine the angular speed of the wheel. (b) Relative to the axle, what is the tangential speed of a point located 0.243 m from the axle?

61. ## Math (help steve)

Brilli the ant placed the numbers 1,2,…,n in order clockwise around a circle. She can create an infinite sequence A={aj}∞j=0 of integers by letting a0=k∈{1,2,…,n} and constructing ai+1 from ai by taking the integer that is ai positions clockwise in

62. ## social studies

I was wondering if this is right my answer has ( ) around it During Jefferson's presidency, cities were (A). mainly ports for international trade. B. mostly the haunts of thieves and degenerates. C. mainly industrial centers. D. mostly found along the

63. ## algebra

I need help in the steps simplifying these radicals. Simplify 5√3 - √98 + √48 + 6√2

64. ## Physics

A proton is traveling horizontally at 5.4 × 106 m/s in a direction 45o north of west. A magnetic flux density has a magnitude of 0.25 T and is directed north. What is the force on the proton? Answer 1.5 × 10-13 N, up 2.1 × 10-13 N, down 1.5 × 10-13 N,

65. ## algebra

simplify √300/√6

66. ## math

One pipe can fill a pool in 20 minutes, a second can fill the pool in 30 minutes, and a third can fill it in 10 minutes. How long would it take the three together to fill the pool?

67. ## social studies

my answer has ( ) around it With respect to the eighteenth century, the concept of the "middle ground" is helpful in A. understanding the attitudes of Indians living between the Appalachians and the Mississippi. B. explaining the attitudes and preferences

68. ## Statistics

Are my answers here correct ? Research questions for z test, t test for independent samples and t test for dependent samples : z test: "An investigator is interested in finding out whether the particular sample of college students is similar to or

69. ## math

The area of a rectangle is 15 + 5y square feet. Which of the following expressions could be the lengths of the sides of the rectangle, in feet? A.5 and 3y B.5 and 3 + y C.5 and 5 + y D.3 and 5 + 3y

70. ## math

a manufacturer markets 2 products. each unit of Product A requires 3 hours in the moulding department, 4 hours in the Paint Shop, 1 Hour in Finishing. Each unit of B requires 3 hours in moulding, 2 hours Painting, and 2 hours finishing. Each week there are

71. ## Math-Hooke's law

Using Hooke's Law (F=kx) determine: A) A weight of 5 pounds stretches a certain spring from its natural length of 10.2 inches to a length of 10.5 inches. Find K. B) What weight will stretch the spring in part (A) to a length of 13.2 inches? Thank you!

72. ## MATH 117

What is the greatest common factor (HINT: It may help for you to show an example of how to find a greatest common factor)? How do you know when you have found the greatest one?

73. ## Physics

Telephoto lenses allow one to "zoom in" on distant objects, making them bigger. A particular telephoto lens consists of a combination of two thin lenses having focal lengths of f1=20 cm and f2=−8 cm, respectively. The lenses are separated by a distance

74. ## psychology

You go to a party feeling a little unsure of yourself. When you get there, you feel anxious but aren't sure why. You see a good friend you didn't know would be there and your anxiety recedes. You decide everything will be okay and start to relax. The part

75. ## math

Brilli the ant placed the numbers 1,2,…,n in order clockwise around a circle. She can create an infinite sequence A={aj}∞j=0 of integers by letting a0=k∈{1,2,…,n} and constructing ai+1 from ai by taking the integer that is ai positions clockwise in

76. ## algebra

Can someone help my simplify √300 / √6 I believe it simplifies to 50??

77. ## english

could u explain the rhyming scheme aa bb cc

78. ## Math

1/16x+1/4=1/2

79. ## Math

A Circular rug is 6 yards in diameter. Biding for the edge of the rug costs \$2.00 per yard . What Will it cost to bind thr rug?

80. ## trig

Simplify: csc^2 x sec x / sec^2 x + csc^2 x

81. ## math

Maryann rolls a 6-sided dice six times. How many ways can she roll the dice so that the sum of her numbers is 10?

82. ## Math

Find the solution set of the equation {x^2+y^2=34 {x+y=2

83. ## algebra

factor y^2 + 18xy + 81x^2

84. ## math

arrange the numbers 8 to 16 in the square so that the sum of each row (across, down, diagonally) will always be 36. ply help my daughters.

85. ## Math

How do I find the prime factorization of number 2002?

86. ## English

1. Is the city very far from here? 2. No, it is very close. (What is the part of speech of 'far' and 'close'? Are they adverbs or adjectives?)

87. ## math

It takes 1 and 3/4 hours to fill a new underground gasoline storage tank. What part of the tank would be fill if the gasoline had been shut off after 1 hour?

88. ## math

Matt walked 3 miles in 3/4 of an hour. At what rate of speed did he walk in miles per hour?

89. ## math

A computer train travels the distance from Acton to Boston in 1 hour and 10 minutes. If the train is traveling at an average speed of 48 miles per hour, what is the distance between the two cities?

90. ## math

Padding 7 miles upstream, Steven and his brother averaged 2 miles per hour. On the way back, their rate of speed was 3 1/2 miles per hour. How long did it take them to make the round trip?

91. ## Math Ratios

Force of attraction between two spheres is 3.75 x 10?-5 dyne when the spheres are placed 18 cm apart. What is force of attraction when placed 52 cm apartÉ

92. ## Math Ratios

Force of attraction between two spheres is 3.75 x 10^-5 dyne when the spheres are placed 18 cm apart. What is force of attraction when placed 52 cm apart?

93. ## Science

How many kilos of ammonia (N1H2)are contained in 600L of a solution that is8% NC13 by volume

94. ## Physics

An object accelerates from 10m/s to 16m/s in 10 secs. What will be the object’s velocity after 1 minute?

95. ## Math

If I had a company of 5000 employees and wanted to be at least 99% sure to within +/- 3% that my survey results reflected the population... how many surveys would I need to administer?

96. ## Math (algebra)

Let x,y be complex numbers satisfying x+y=a xy=b, where a and b are positive integers from 1 to 100 inclusive. What is the sum of all possible distinct values of a such that x^3+y^3 is a positive prime number?

97. ## Math

Find the solution set of the equation {x^2+y^2=34 {x+y=2

98. ## gen physics

An iron (ƒâ = 7860 kg/m3) cube measuring 15.4 cm on a side is suspended from a wire. Find the tension in the wire when the block is completely submerged in water (ƒâ = 1000 kg/m3).

99. ## gen physics

Two masses, mA = 20.00 kg and mB= 12.00 kg, are 50.00 m apart. Find the location of the center of mass of the two masses, relative to mass A.

100. ## algebra

Factor 24^2 + 42x + 15

101. ## algebra

Simplify 5√3 - √98 + √48 + 6√2

103. ## math

If A can do a job in 6 days that V can do in 5 1/2 days and C can do in 2 1/5 days, how long would the job take if A,B, and C were working together?

104. ## Geography

1)The study of geography includes a)living in a dessert b)growing food c)predicting the weather d)studying people e) wearing protective clothing 2) which of the following country has no seaport a) Egypt b)Algeria c)Nigeria d)South Africa e)Uganda 3)about

105. ## chemistry

how do you find moles?

106. ## math

Ann bought 2/3 lb of carrots 3/4lb of celery and 7/8lb of onions. How many lbs of vegetables did she buy?

107. ## Physics

A train initially travelling at 30ms^1 decelerates at 4ms^2. (a) What time will it take to slow to 5m s^1? (b) What distance will it have travelled when it has slowed to 5ms^1?

108. ## Math (algebra)

What are the last three digits of the largest perfect square that can be expressed as p^2+pq+q^2, where p and q are (positive) prime numbers?

109. ## Philosophy

Identify a current event or contemporary social issue that involves ethical values.

110. ## life orientation

in 10-15 lines critically discuss 5 ways in which the human or environmental problem impact on the community

111. ## Physics

The flux through a window whose surface is parallel to magnetic field lines is zero. Answer True False

112. ## Physics

In a magnetization cycle, a large hysteresis loop indicates ____. Answer the material is nonmagnetic a large amount of energy loss due to heating the size of the material is large the material will not remain well magnetized

113. ## Physics

A material that remains highly magnetized after a magnetization cycle has a large hysteresis area. Answer True False

114. ## English

Is the market far away? _ No. It's very close. You can walk slowly. (In this short dialogue, what is the meaning of 'can'? Does 'can' mean 'may', which tells permission?)

115. ## math

what is the least number of cubes that can be formed by completely cutting a large cube into smaller cubes that are identical to each other 2 4 6 8 16

116. ## algebra

-14x^2 -29x -12

117. ## socialology

According to Lips (2008), Plato “described women and men as having the same nature and worth and deserving the same education and legal treatment” (p. 57). These ideas of having the same nature have changed over the centuries. Most theories regarding

(-16)^-2/3

119. ## math

Find the pay P Ken receives for a 49-hour week if the pay x he receives for 40 hours is \$180 and the pay y for each additional hour is \$6.75. Use P = x + 9y.

120. ## Literature

What do you think Antigonê and A Raisin in the Sun imply about Sophocles and Lorraine Hansberry's cultural identities?

121. ## Math

Find the solution set of the equation {x^2+y^2=34 {x+y=2

122. ## English 3 questions

How does cost determine which financial choice you make? What would your life be like without taxes? What are your choices to finance (pay for) a major purchase like your first car? thanks

123. ## algebra

factor -216x^3 + 1

Brilli the ant is considering the complexities of a 5-dimensional universe. She wants to count the number of integer points that are distance n√ away from the origin. Let Tn be the set of ordered 5-tuples of integers (a1,a2,a3,a4,a5) such that

125. ## math

part a: Lucy makes pottery to sell. One week , she uses 6 3/4kg of clay next week 2 2/3 clay. HOW much does she use during 2 weeks ? part b : The clay is in blocks that weigh 12 kg. How much clay does lucy have left after using clay for 2 weeks ?

Brilli the ant randomly placed a token into a square on a 2×100 chessboard according to a probability distribution P. The token is then moved uniformly at random to one of the horizontally, vertically, or diagonally adjacent squares. The probability that

127. ## maths

name some rectangle numbers

128. ## Math

Brilli the ant has a block of cheese that is in the shape of an equilateral triangle. She is hosting a party, and has invited her two-legged house mates. She insists that all of her guests get a piece of cheese that is in the shape of an isosceles

129. ## Life orientation

Five ways in which tithe environmental problem impacts on the community

130. ## Math (number theory)

For how many positive integers N is ⌊N^2/5⌋(floor of N^2/5) a prime?

131. ## English

1. Amy took a subway yesterday. 2. Amy took the subway yesterday. 3. Amy took two subways yesterday. (Which expressions are grammatical?)

132. ## math

bob make 720 telephone calls each year. what is the average (arithmetic mean) number of calls that bob makes per month 60 70 80 100 120

simplify √75