# Questions Asked onApril 24, 2011

1. ## Chemistry

A 32.5g cube of aluminum initially at 45.8 C is submerged into 105.3g water at 15.4 C. What is the final temp of both substances at thermal equilibrium. Assume the al and the H2O are thermally isolated from everything else) Specific heat cap Al= .903

2. ## Chemistry

One of the main components of hard water is CaCO3. When hard water evaporates, some of the CaCO3 is left behind as a white mineral deposit. If hard water solution is saturated with calcium carbonate, what volume of the solution has to evaporate to deposite

3. ## Chemistry

Consider the following reaction occurring at 298K BaCO3(s)-> BaO(s) + CO2 (g) show that the reaction is not spontaneous under standard condition by calculating delta G rxn. I calculated delta G and got 219.7 kJ, now the question asks if BaCO3 is placed in

4. ## college chem

The cation M2+ reacts with NH3 to form a series of complex ions as follows: M2+ + NH3 M(NH3)2+ K1 = 102 M(NH3)2+ + NH3 M(NH3)2 2+ K2 = 103 M(NH3)2 2+ + NH3 M(NH3)3 2+ K3 = 102 A 1.0 × 10–3 mol sample of M(NO3)2 is added to 1.0 L of 15.0 M NH3 (Kb = 1.8

5. ## Algebra

Sam invested \$1950 part of it at 6% and the rest at 8% yearly interest. The yearly income on the 8% invest was 6\$ more then twice the income from the 6% investment. how much did he invest at each rate

6. ## calculus

A street light is at the top of a 19 ft tall pole. A woman 6 ft tall walks away from the pole with a speed of 5 ft/sec along a straight path. How fast is the tip of her shadow moving when she is 40 ft from the base of the pole? Rate =

7. ## physics

A cube of ice is take from the freezer at -8.5C and placed in a 95g calorimeter aluminum cup containing 310g of water at 20degC. The final situation is observed to be all water at 17degC. What was the mass of the ice cube?

8. ## Physics

A 74.5 kg ice skater moving to the right with a velocity of 2.62 m/s throws a 0.21 kg snowball to the right with a velocity of 23.8 m/s relative to the ground. (a) What is the velocity of the ice skater after throwing the snowball? Disregard the friction

9. ## simplex Method

Solve the linear programming problem by the simplex method. Maximize P = 5x + 4y subject to 3x + 5y < 78 4x + y < 36 x > 0, y > 0 x = y = P =

10. ## geometry

Triangle PQR has vertices P(1,2), Q(25,2) and R(10,20). Find the coordinates of the centroid. Find the coordinates of the circumcenter. Find the coordinates of the orthocenter. Find the equation of the line.

11. ## Probability as a Fraction

In a bag there are 7 red tiles, 3 blue tiles, and 2 purple tiles. How many and what color tiles would you have to add to the bag so that the probability of picking red is 1/3?

12. ## consumer mathematics

a sofa sells for \$840. the sale price is \$714., find the percent of decrease of the sale price from the regular price

13. ## Simplex Method

Solve the linear programming problem by the simplex method. Maximize P = 10x + 6y subject to x + y < 80 3x < 90 x > 0, y > 0 x = y = P =

14. ## physics

The physics of a golf ball and kinetic energy. When a 0.045 kg golf ball takes off after being hit, its speed is 41 m/s. a) What is the kinetic energy of the ball after it has been hit? b) How much work is done on the ball by the club? c) Assume that the

15. ## physics

A clock with a pendulum made of steel has a period of 1.000 s at 20.0°C. The temperature is decreased to 4°C. By how much does the period change? How much time does the clock gain or lose in one week?

16. ## Spanish

1. Hay que ______ agua, ¿verdad? a. conserva b. conservar c. conservé d. conservo A? 2. Quiero dormir. Por favor, ____ la luz. a. apagamos b. apago c. apagué d. apaga B? 3. "¿Dicen Uds. la verdad?" "Sí, siempra la _______." a. decimos b. digo c.

17. ## physics

1. The physics of Mars and its two moons. Mars has two moons, Phobos and Deimos (Fear and Panic, the companions of Mars, the god of war). Deimos has a period of 30 h, 18 min and a mean distance from the centre of Mars of 2.3 x 104 km. If the period of

18. ## physics

A roller coaster of mass 1000.0 kg passes point A with a speed of 1.80 m/s? point a= 30m point b= 0m point c= 25m point d= 12m 1. What is the total mechanical energy of the roller coaster at point A? 2. What is the speed of the roller coaster at point B?

19. ## english

tennyson's "the lady of shalott has a rhythm and a rhyme pattern that make it sound like a. a sonnet b. an elegy c. a nursery rhyme d. an ode

20. ## Chemistry

What mass of the following solution contains 0.100 mol of solute? 0.334 molality NH4NO3

21. ## social studies

Why do you think the cities of Judaea were all important centers of Christianity? Because they were places where important times in Jesus' life occurred. Do you think this is the answer my teacher is looking for??

22. ## physics

The physics of orbital radius and orbital period of a planet. If a small planet were discovered whose orbital period was twice that of Earth, how many times farther from the sun would this planet be?

23. ## physics

Two identical wooden barrels are fitted with long pipes extending out their tops. The pipe on the first barrell is 1 foot in diameter, an the pipe on the second barrell is only 1/2 inch in diameter. When the larger ptpe is fill with water to a height of 20

24. ## Chemistry

A nitric acid solution is found to have a pH of 2.70. Determine [H3O+],[OH-], and the number of moles of HNO3 required to make 5.50L of the solution.

25. ## physics

A woman with a mass of 65kg climbs a set of stairs that are 3m high. How much gravitational potential energy does she gain? Thank you.

26. ## Chemistry

How many moles of HCl must be added to 100mL of a 0.100 M solution of methylamine (pKb=3.36) to give a buffer having a pH of 10.0?

27. ## PRECALCULUS

1.) determine two pairs of polar coordinates for the point (-4sqrt3, 4sqrt3)with 0degrees less than or equal to theta less than or equal to 360degrees 2.) Use DeMoivre's Theorem to find (1-i)^10. write your answer in the form a+bi. 3.) Find the cube roots

28. ## social studies

By a.d. 325, Christianity had spread to which continents? Northern Africa, Southern Europe and Western Asia. Is my answer correct?

29. ## physics

The physics of satellite motion around Jupiter. A satellite of mass 2.00 x 104 kg is placed in orbit 6.00 x 105 m above the surface of Jupiter. Please refer to the data table for planetary motion included in this lesson. a) Determine the force of

30. ## physics

Given that 12g of carbon combines completely with 16g of oxygen to form carbon monoxide, how many grams of carbon monoxide can be made from 48g of carbon and 48g of oxygen

31. ## Physics

A radiation worker is subject to a dose of 150 mrad/h of protons for one 40 h work week. How many times the yearly allowable effective dose did she receive?

32. ## simplex Method

A company manufactures two products, A and B, on two machines, I and II. It has been determined that the company will realize a profit of \$3/unit of product A and a profit of \$4/unit of product B. To manufacture 1 unit of product A requires 6 min on

33. ## physics

If an 80kg sprinter can accelerate from a standing start to a speed of 10 m/s in 3s, what average power is generated

34. ## Simplex Method

Solve the linear programming problem by the simplex method. Maximize P = 27x + 27y + 36z subject to x + y + 3z < 15 4x + 4y + 3z < 65 x > 0, y > 0, z > 0 x + y = z = P =

35. ## physics

Oxygen molecules contain two oxygen atoms, and carbon dioxide molecules contain one atom of carbon and two atoms of oxygen. How does the total number of molecules in 1 liter of oxygen compare with the total number of atoms in 1 liter of carbon dioxide if

36. ## Chemistry

In this experiment the only source of Ca2+ ions is Ca(OH)2. Using the experimental Ksp value, calculate the slubility of Ca(OH)2 (in mol/L) in .30 M NaOH. Experiment Ksp = 1.69x10^-5

37. ## ap chemistry

Arrange the following 0.10 M solutions in order of increasing H+ : HClO4 , H2SO4, NH4Br , KCN, KBr, KOH

38. ## British Lit.

Explain hoW Percy Bysshe Shelley relates the skylark's song to his own efforts to write poetry in "To a Skylark."

39. ## statistics

the birth of healthy, full term infants in the United States is nearly normally distributed. The mean weight is 3,500 grams, and the standard deeviation is 500 grams. (a) what percentage of the healthy newborns will weigh more than 3,250 grams? (b) what

40. ## Microeconomics

Search: Consider two resource markets in which the demand curves slope downward. In market A, the supply curve is horizontal, equilibrium price is \$6, and 100 units of the resource are hired. In market B, the supply curve is vertical, equilibrium price is

41. ## General Biology

Genetic Inheritance Exercise 1: F1 Hybrid Cross Results: Punnett Square for F1 Cross ¡V Expected Genetic Outcomes F1 Parent, genes: _________ (student to fill in the blanks) ¡ð alleles > ¡ñ alleles v F1 Parent, genes:__________ (student fill in blank)

42. ## Physics

A garden hose with a diameter of 0.65 has water flowing in it with a speed of 0.91 and a pressure of 1.2 atmospheres. At the end of the hose is a nozzle with a diameter of 0.29. Find the speed of water in the nozzle? Find the pressure in the nozzle.

43. ## chemistry

At a certain temperature, 514, Kp for the reaction, Cl2(g) + Br2(g) 2 BrCl(g), is 6.98 x 107. Calculate the value of DGo in kJ for the reaction at 514 K.

44. ## physics

The physics of gravity and satellite motion around Jupiter. A satellite of mass 2.00 x 104 kg is placed in orbit around Jupiter. The mass of Jupiter is 1.90 x 1027 kg. The distance between the satellite and the centre of Jupiter is 7.24 x 107 m. a)

45. ## Psychology

Can anyone think of another example of a Personological variable other than just personality? I'm looking at the General Aggression Model (the long term one) and it says an increase in agressive personality leads to Personological variables (e.g.

46. ## Chemistry

What is the mole fraction of benzene C6H6 in the VAPOR PHASE from a solution consisting of a mixture of benzene and n-hexame ch3(ch2)4ch3 at 27celsius, if the total pressure above the solution is 135.2 torr? The vapor pressures of benzene and n-hexame at

47. ## Physics

A 20 cm long, 180g rod is pivoted at one end. A 17g ball of clay is stuck on the other end. What is the period if the rod and clay swing as a pendulum?

48. ## math

Im stuck on this question. Could someone answer it. Id appreciate it. The projected rate of increase in enrollment at a new college is estimated by: dE/dt = 9000(t + 1)^-3/2 where E(t) is the projected enrollment in t years. If the enrollment is 5000 now

49. ## English

Can someone give me some feedback on this compare and contrast essay that I have completed. Into day’s society, online social networking has provided a variety of advantages and disadvantages. The use of today’s technology results in an alternative to

50. ## Physics

Let us assume that the muon production happens at an altitude of about 15 kilometers above the surface of the Earth, and that the produced muons have a velocity of 0.99 c. Thus, in the Earth system, it takes the muon approx. 50500 nanoseconds to reach the

51. ## algebra

Melinda invested three times as much money at 9% yearly interest as she did at 7%. her total yearly interest from the two investments was 170\$ How much did she invest at each rate Thanks !!

A Foucault pendulum is designed to demonstrate the effect of the Earth's rotation. A Foucault pendulum displayed in a museum is typically quite long, making the effect easier to see. Consider a Foucault pendulum of length 16 m with a 109-kg brass bob. It

53. ## physics

What is the mass of a lead sinker witha volume of 3cm3? please show work Thank you

54. ## College Chemistry

Determine how many grams of water can be produced from excess propane C3H8 and 2.55g oxygen? MM 02 = 32 and MM H2O = 18.2. I tried 2.5 gm O2 X 5 mole O2/32.00 gm O2 x 4 mole H2O/5 mole O2 = 1.40. This is close but not correct. The answer is 1.15. Can you

55. ## trig

find, to the nearest tenth of an inch, the length of the arc intercepted by a central angle of (4pi)/3 radians if a radius of the circle is 22 inches long

56. ## statistics

At a neighboring university, the average salary is also \$45,000 and the distribution is normal. If \$47,000 has a z score of 1.5, what is the standard deviation?

57. ## feg-01

transcribe the following words; 1. comb 2. examination 3. photograph 4. island 5. debut

58. ## Surveys/Geography

Do you think this is a good survey or should I change the wording and/or add questions? ******* Have you heard of the movie ‘The Castle’? Have you seen the movie ‘The Castle’? Do you believe that this movie is an accurate portrayal of Australian

59. ## chem

Arrange the following 0.10 M solutions in order of increasing H+ : HClO4 , H2SO4, NH4Br , KCN, KBr, KOH

Where does personal responsibility end and corporate responsibility begin? How does your response change across specific industries? What role (if any) do you believe the government should play? Develop a rationale for each of your answers.

61. ## science

i have a sciencs fair coming and i don't know what to do please help it has to do with eather plants,prisipatation or i cant remember.

62. ## Comparative Essay

I need help on a camparative essay between Barbie Doll and Phenomenal Woman and I would like to include Mirrors. In Barbie Doll society will dictate to us about body image, In phenomenal woman she is confident and is telling society how good she looks and

63. ## biology

To ensure that the mother will have mature egg cells available for in vitro fertiliazation, she must be treated with chemicals that regulate her reproductive cycle. identify these chemicals tha tregulate the female reproductive cycle. Please help me

64. ## physics

You can apply enough force to the head of a pushpin to push it into a plaster wall with your thumb. However, it is not a good idea to try to do this with a needle. Use the concept of pressure to explain the differnce betweeen these two situations. Thank

65. ## Probability

In a 1970’s game show, a contestant was given a choice of three doors of which one contained a prize. The other two doors contained gag gifts like a chicken or a donkey. After the contestant chose an initial door, the host of the show then revealed an

66. ## layla

Mrs. Baker has to choose 2 students to lead the class field trip. If she draws from a list of 6 boys and 6 girls, what is the probability that 2 girls will be drawn? (Please Help!) A.1/7 B.5/24 C.5/22 D.5/6

67. ## algebra

Part \$30000 is invested at 6% another part at 7% and the remainder at 8% yearly interest the total yearly income from the 3 investments is \$2200

68. ## statistics

A professor knows that in her class 37% of the students have passed an Algebra course, 29% have passed an English course, and 21% have passed both courses. If one student is selected at random from this class, find the probability that: c) the student did

69. ## physics

A .095kg aluminum sphere is dropped rom the roof of a 45m building.If 65% of the thermal energy produced when the sphere hits the ground is absorbed by the sphere, what is its temperature change?

70. ## english

which of the following poems is a dramatic monologue? a. my last duchess b. love among the ruins c. childe roland to the dark tower came d. all of these

71. ## Physics

A 984 kg car is driving along a boardwalk. The car's center of mass is 33 cm in front of the rear wheels, and the distance between the front and rear wheels is 2 m. What total force does the car's front tires exert on the boardwalk? Give your answer in

72. ## Finance

Assume a \$4,000 investment and the following cash flows for two alternatives. Year Investment X Investment Y 1 \$1,000 \$1,300 2 800 2,800 3 700 100 4 1,900 5 2,000 a. Under the payback method, which investment should be chosen? (Show your

73. ## Chemistry

What mass of the following solution contains 0.100 mol of solute? 0.334 molality NH4NO3

74. ## physics

What is the acceleration due to gravity 100km above the surface of the Earth? (Average radius of Earth is, Re=6.4x10^3km)

75. ## Social Studies

Why do you think the ideas of Marxism were mostly not realized in the actual experiences of socialist countries?

76. ## physics

One of the moons of Jupiter is Io. The distance between the centre of Jupiter and the centre of Io is 4.22 x 10^8 m. If the force of gravitational attraction between Io and Jupiter is 6.35 x 10^22 N, what must be the mass of Io?

77. ## Math

f(x)=(x^3-27)/(x^2-3x) I need to find the slant. If the vertical asymptotes is x=0 then is the slant y=x+3?

78. ## com/156

Read the essay and write a paragraph of at least 200 words in which you discuss how effectively the author persuaded you.

79. ## Religion and Spirituality

What do you think is the moral of the story Tao of Forgiveness? Thank you :)

80. ## physics

What is the mass of a lead sinker witha volume of 3cm3? please show work I calculated 11.3*3 = 33.9 Is this correct.. Thank you.

81. ## AP Statistics

Viruses are infectious agents that often cause diseases in plants. Different viruses have different potency levels, and this fact can be used to detect whether a new virus is infecting plants in the field. In a potency comparison experiment, two viruses

82. ## chem

what is the molarity of iodine ions in a 100 mL solution containing 2.50g of MgI2?

83. ## Chemistry

The vapor pressure of pure water at 90celsius is normally 525.8 but decreased 483mmHg upon addition of an unknown amount of KNO3 to 286.9g H2O at this temperature. how many grams KNO3 were added. ASSUME COMPLETE DISSOCIATION OF SOLUTE. Tried all solutions

84. ## world history

why was the congo free state not able to make a profit in the early years?

85. ## physics

It is possible to cut the top off a alcohol-in-glass thermometer without any of the alcohol spilling out. However, it will no longer function as a good thermometer. Why not. I am thinking it is a lost pressures issue.

86. ## Math

graph each linear function. y= -x + 4 y= 2/3x + 1 y= 2x + 1 y = -1/2x + 3

87. ## Chemistry

Use Hess' Law to calculate the heat of the following equation. Show all work including the reactions that you use, in the form that you use them. 2 C + 2 NO2 ---> 2 CO 2 + N 2

88. ## english

14. When one buys insurance, you need to be clear about your needs. __ Pronoun shift in number __ Pronoun shift in person __ Ambiguous reference __ No error

89. ## Chemistry

The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is 762 mm Hg. If the flask is immersed in a water bath at 450C, the total pressure is 980 mm Hg. The vapor pressure of ethanol at

90. ## physics

A ball is thown at 20m/s at an angle of 30 degrees from the horizontal level. What maximum height can the ball reach?

91. ## Math

If a pro basketball player has a vertical leap of about 35 inches, what is his hang time? Use the hang-time function V = 48T²

92. ## calculus

I am learning derivatives and I despise having to use the definition of the derivative. Please check my answer for this particular one! it is different from the one I get by differentiating. The question: f(x) = 2+x / x^3 my answer: -6x^2-2x^2

93. ## English

As an English teacher where would i go in ENgland and Why??

94. ## trig

find, to the nearest tenth of a meter, the length of the arc intercepted by a central angle of 160 degrees if a radius of the circle in 8 meters long

95. ## phi

Catherine goes to her local movie theater only to see romantic comedies. Since Catherine did not go to the movies yesterday, there is not a romantic comedy playing at her local theater. The reasoning above is flawed because the evidence

96. ## AP Chemistry

write the keq expression for the following reaction and determine the value of the Keq at 25degree celcius: MnO2(s)+4H+(aq)Mn2+(aq)+2H2O(l)+Cl2(g)

97. ## physics

With density g/cm3 copper 8.93 silver 10.5 mercury 13.6 will a block of copper or silver float higher in mercury in liquid form? Thank you.

98. ## Chemistry

Magnesium is found in the ore,magnesite, MgCO3. The ore decomposes when heated to form magnesium oxide and carbon dioxide. Write the balanced equation for this reaction.

99. ## Math

A Man and 6 boxes weigh 300 lbs. If the man weighs 228 lbs., how much does each box weigh?

100. ## Pharmacist information

Pharmacists who are trained in the United States must earn a Pharm.D. degree from an accredited college or school of pharmacy. The Pharm.D. degree has replaced the Bachelor of Pharmacy degree, which is no longer being awarded. To be admitted to a Pharm.D.

This is not in order. Please put the story about "The wishing well in order" 1. Today is a particularly busy day at the well. 2. This wishing well is very popular 3.It is New Years Day 4.Other People make wishes about their families. 5. For this reason the

102. ## math

Find the vertex, the line of symmetry, and the maximum or minimum value of f(x). Graph the function. F(x) = 1/8 (x + 9)² +3

103. ## University of Phonenix

Disputes that arise when one person has registered a domain name that is an existing trademark or company name are settled by the

104. ## Physics

A 395cm oscillator has a speed of 104.5cm/s when its displacement is 2.80cm and 74.5cm/s when its displacement is 6.60cm. What is the oscillator's maximum speed?

105. ## math

A professor knows that in her class 37% of the students have passed an Algebra course, 29% have passed an English course, and 21% have passed both courses. If one student is selected at random from this class, find the probability that:

106. ## Calculus

sketch the region enclosed by the given curves. Decide whether to integrate with respect to x or y. Then find the area of the region. 2y=5 rootx, y=5, and 2y+2x=7.

Describe thwe business organization with the basic legal, socila,economic environment

108. ## Physics

A railroad car with a mass of 1.93 104 kg moving at 3.24 m/s joins with two railroad cars already joined together, each with the same mass as the single car and initially moving in the same direction at 1.16 m/s. (a) What is the speed of the three joined

109. ## Math

Use the quadratic formula to solve the equation. x² - x = -2 Type an exact answer, using radicals as needed. Express complex numbers in terms of i. Use integers or fractions for any numbers in the expression. Use a comma to separate answers as needed.)

110. ## math

Evaluate the polynomial for x = -2. Simplify your answer 3x² - 2x +2

111. ## Bristish Lit.

Discuss the Symbolism William Blake used in his poems "The Lamb" and "The Tyger."

112. ## chemistry

If in August 1911 Mme. Curie prepared an international standard containing 20.00 mg of RaCl2, what will the radium content of this standard be in August 2010?

113. ## physics

The physics of energy and Earth's moon as a satellite. The moon is an Earth satellite of mass 7.35 x 10^22 kg, whose average distance from the centre of Earth is 3.85 x 10^8 m. a) What is the gravitational potential energy of the moon with respect to

114. ## Chemistry

The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is 762 mm Hg. If the flask is immersed in a water bath at 450C, the total pressure is 980 mm Hg. The vapor pressure of ethanol at

116. ## chemistry

How can precipitates be dissolved? never? by adding constituent ions to the solution? by complexing one of the constituent ions in a soluble form?

117. ## biology

explain how mitosis helps an organism to grow.

118. ## Computer

12. Enter the following Marks for Assignment One figures: Name Assgn 1 John 10 Mary 12 Emma 15 Pita 15 Avi 15 Ramu 10 Sani 11 13. Due to a recent natural disaster, MAF11 students were unable to submit their assignments 2 and 3. The Course Coordinator then

119. ## math

Jack usually mows his lawn in 4 hours. Marilyn can mow the same in 5 hours. How much time would it take for them to mow the lawn together?

120. ## calculus

integrate (cos3x)^2/(1-2pcos(2x)+p^2) dx from x=0 to 2pi for 0

121. ## differential equation

Find the Laplace transform by using the theorem of L{f(t-a)H(t-a)}=(e^-as)F(s) L{(e^4t)H(t-10)}

122. ## physics

rare element very low carbon are composed of symmetrical triangle that have very much, and which are closely linked in the mirror and solid form what can ...

The mass m = 14 kg shown in the figure is displaced a distance x to the right from its equilibrium position. (Take k1 = 113 N/m and k2 = 198 N/m.) (a) What is the net force acting on the mass? (Use any variable or symbol stated above along with the

124. ## Chemistry lab

I did a copper cycle lab and my final weight of the copper is less than what i started with. Where did the lost copper go?

125. ## chemistry

The atomic mass of iron oxide is 160 atomic mass units. What is the atomic mass of iron if a molecule of iron oxide consists of tow atoms of iron and three atoms of oxgen?

126. ## Math

Please help to convert the following(Show work please!!! 1.62500 Grams to kilograms 62500 Grams to Pounds 62500 Grams to Ounces 2.44500 Centimeters to meters 44500 Centimeters to yards 44500 Centimeters to Inches

127. ## Maths

Hey! Okay so when the weather reporters say that ?mm of rain fell over night, they're talking about mm cubed aren't they? So while I was working out what to cube root to find out the ?mm of rain that fell overnight, I called it Rainfall mm. So what could I

128. ## pre- algebra

In a survery, students were asked whether they play basketball or tennis. Of 34 students, 24 play basketball and 13 students play tennis.4 students play neither. How many students play both sports? Is it 7 students?

129. ## physics

gold and silver have densities of 19.3 and 10.5 grams per cubic centimer, respectively. If you have eual volumes of each, which one will have the larger mass? I am thinking the gold. how do i prove it? Thank you

130. ## english grammar

pls.check my english grammar if it is correct usage. i remeber when i was at my young age i was always doing all the i could.

131. ## Geology/Mineralogy

Hope some experts can help me answer the question below~ really need for the help ~~ thanks so much^^ My question: I am studying a polished cross-sectional piece of an igneous rock under the SEM. How do I determine which phases/compounds crystallize first

132. ## Science

What is the effect of increasing "dead space" ?

133. ## Related Occupations

Could I know of some related occupations to a Pharmacist?

134. ## physics

Two wires run parallel to each other with currents I1 = -60.3 A, and I2 = 44.1 A. If they are a = 0.12 m apart, what is the magnitude of the force (N) per meter of length? I used the formula (f/L)=Uo(I1)(I2)/(2(pi)(r)) I got 4.43810^-2(N/m)but it was

135. ## algebra 1

In the standard (x,y)cooridniate plane the graph of (x-2)second power +(y+4 second power =9 is a circle. What is the area enclosed by this circle, expressed in sguare coordinate units? please help me?

136. ## spanish

How do I say "sue me" in spanish?

137. ## History

I just want my answer to be clarified. So the original idea of boundaries was to separate the land among the territories and provinces...??? And make locations on maps seem easier? --I still feel like I'm missing out on some things, but I don't know what

138. ## arabic

how do i know when to use: meem heh meem wow heh meem alaf heh meem in a sentence? Is there a "trick"?

139. ## math

If a pro basketball player has a vertical leap of about 35 inches, what is his hang time? Use the hang-time function V = 48T²

140. ## algebra

While vacationing,john has dinner at a restaurant in Japan and his tab comes to 3,428 yen. The exchange rate at the time of his visit is 1 yen = 1.25 cents. What was the cost of the meal in US dollars??

141. ## physics

a cetrifical force of 98N is acted upon a 5kg. ciculating object. If the object is moving at a radius of 1.2m ,what speed is needed to keep it in the cicular motion?

142. ## Earth Science

This is the raw data we got from the river: The mins it took the tongue depressor to float from point a to b and the depth of the river on those days. Using area x velocity, I need to calculate the discharge results for the following dates: April 4 2:52

143. ## Math

Could someone answer this question so I understand it. Thanks Find the indefinite integral: çx/ã3x^2+4 dx Use C as the arbitrary constant.

144. ## statistics

Four friends decide to buy a bag of 56 gold coins..Each person contribute the following Sue \$320 John \$300 Mike \$220 Betty\$ 160 Please determine the apportionment using a.Hamilton method b.Jefferson method C.Webster method

145. ## Math

Arthur is trying to figure out the heights of 3 of his friends. Here are the facts he know: 1. The sum of the heighta oglf these 3 friends is 17 fast 8 inches. 2. The shortest friends is 5 feet 6 inches tall 3. The other 2 friends differ in height by 4

146. ## calculus

I posted one before but this is another one of those problems that i need help with! I don't know how to approach this one at all! Please help use the definition of the derivative to find f'(x) when f(x)= (4/x^2)+(2/5*x)

147. ## Chemistry

Several years ago a company invented plastic ice cubes. These were colored plastic cubes with frozen water (or another substances) inside. That way, as the solid melted, it could cool your drink, but did not dilute it with extra water (from the melted

148. ## MATH

2, -4, 8,... The first term of the sequence above is 2, and every term after he first term is -2 times the preceding term. How many of the first 50 terms of this sequence are less than 100? (A) 22 (B) 25 (C) 28 (D) 30 (E) 37

149. ## statistics

given that u=100 X=91, s=27, and N=30 (a)calculate t. (b)write a sentence interpreting the value of t as a two- tailed test. (c)write a sentence interpreting the value of t as a one-tailed test.

150. ## statistics

calculate the 95% confidence interval for u given X=100, s=25, and N=101

For the following equation, state the value of the discriminant and then describe the nature of the solutions. -15x² + 2x + 13 = 0 What is the value of the discriminant?

152. ## physics

Why would an aneurysm (a widening of an artery) be especially subject to ruputering? I am thinking the pressure is greater than what the artery can handle. How do I express this? Thank you.

153. ## statistics

calculate both the pearson and spearman correlation coefficient for the data below. state whether ther are significant? writ a brief statement to explain the results generated by each correlation. self-esteem 10.00,

154. ## English

I forgot to include the following sentences. Thank you very much 1) We went sightseeing in that huge city. We had a guided tour. The sad part was in Chile. They stole a lot from us. 2) Actually, they hotel was a five-star-hotel with no restaurant or pools

155. ## Algebra

How do I find the perimeter of a triangle DMG which has coordinates D(3,-2), M(3,4) and g(1,-2) - my son can't do the problem and I don't remember how to do it anymore

On balance, do you believe that the benefits of free trade outweigh the drawbacks? Why or why not?

157. ## AP Chemistry

A 2.5 gram sample of a hydrocarbon containing C, H, N, O is combusted in excess oxygen. The nitrogen compounds that are formed are treated to convert all of N to N2. The gases are passed through a CaCl2 drying tube which weighs 1.00 gram initially and 3.16

158. ## Chemistry

The total pressure in a flask containing air and ethanol at 25.7C is 878 mm Hg. The pressure of the air in the flask at 25.7C is 762 mm Hg. If the flask is immersed in a water bath at 38.8C, the total pressure is 980 mm Hg. The vapor pressure of ethanol at

159. ## Chemistry

where in the atom would you put a region of fixed small volume if you wished to maximize the chance o finding the electron inside the volume?

160. ## US History

How did the US become involved in the politics of Southeast Asia?

161. ## Math

Explain how factoring is used to solve quadratic equations. Demonstrate the process with an example.

162. ## English

Thank you very much for your information.Here are some sentences I'd like you to check 1) You've to enter the airport. Don't use contracted forms. 2) When the plane lands, go to the baggage reclaim where you can collect your baggage. 3) I'm sure you'll

163. ## chem

Identify the correct equilibrium constant, Keg, expression 2H2(g)+02(g)2H20(l)?

164. ## Maths

So if I'm using the area 8558.25 in that math I need to have it as 8558.25squared and then sqaure root it?

165. ## English

I forgot to include these other sentences. As they are instructions, I'm not sure whether it is possible to use "you have to.., you'll have to". Thank you. 1) Go through passport control.There an official checks (will check?) your passport.All things (or

166. ## English

I still have a few doubts on some sentences. I really hope you can have a look at them. 1) You have to go (?) through the metal detector. 2) Nature was an instrument of God (but not "an The English Renaissance was less connected to (not with) the visual

167. ## World history

What was the economy of Syria like before the current revolution? Do you know any good website for it? Please help me!

168. ## Physics

The Cyclotron lab is not really designed to handle radioactive beams, but Briggsium is too weird to ignore. The physicists propose to generate it in a nuclear reaction immediately behind the accelerators, and are trying to see if they can get the beam all

169. ## writing

What does the (n.d.) stand for in the following sample citation: GovTrack. (n.d.). Brian Higgins U.S. Representative, New York’s 27th District

170. ## political science

Which President developed the Policy of preemption with regard to foreign policy?

171. ## Math

I need to find the domain of f(x) = (3x+3)/ (x^2 -3). I keep getting (U SQUARE Root of 3 and - Square root of 3 U ) Does that mean that the answer is all real numbers? I know that x can not=3, What am I doing wrong? Thanks.

172. ## Communication

How you currently communicate your gender, social, and cultural identities in face to face and online environments, are they differently and why

173. ## general chemistry

Calculate the molar mass that would be obtained from the actul experimental data under the following conditions. The unknown is mehy propy ether (CH3OC3H7) which has the vapor pressure of 375.2 torr at room temperature, 20C. The volume of the flask is

174. ## Chemistry

A 34.6 g block of metal at 2.1oC is dropped into 100.0 g of water at 97.3oC. If the specific heat of the metal is 0.084 cal/goC, what will the final temperature of the water be?

175. ## research methods

a bag of 100 marbles contains 0 blue, 25 green, 25 mixed,and 20 clear. what is the probality of selecting a blue? ablue and green? a marble that is not clear? ablue on the first draw and a clearon the second draw?

176. ## statistics

assuming a two tailed one sample test is being used,what ie the critical value for t given the following sample sizes. N=10 N=15 N=30

177. ## Speechwriting

Hiya! Okay how can I introduce a speech without saying Goodmorning ladies and gentlemen? But not seem rude?

178. ## statistics

given a sample size of 30, and one sample t=-2.5, what would conclude about the sample from which the mean was drawn?

what happens when you watch tv to much?

180. ## Math

Four friends decide to buy a bag of 56 gold coins..Each person contribute the following Sue \$320 John \$300 Mike \$220 Betty\$ 160 Please determine the apportionment using a.Hamilton method b.Jefferson method C.Webster method

181. ## English

Thank you very much for the information. I added a few more things on the same subject. I included the doubts in parentheses. 1)Go (not pass) through the metal detector (?) .Go through passport control where an official checks your passport. 2) You have

182. ## genaral islamic

A wife has applied farsakh in the syariah court. Then later she moved out of the home. The husband, a practicing Islamic worker disagrees with the wife’s action and accused her wife of nusyuz. He said the wife is just being intolerant and having negative

183. ## maths

find the volume of a rectangular prism with a length of 5in.,width of 6 in.and height of 7 in.

184. ## Algebra

In an assembly line of a factory, which produces networking switching hubs, two robots are utilized. The first one (A) is able to produce 40 microchips per hour, whereas the second one (B) produces 30 microchips per hour. For a total production of 400

185. ## science

blank nerves carry informatation from the 5 senses to the brain. this allows us to see, smell, hear, taste and touch. whats the blank?

186. ## English

I need help analyzing this poem please Seasonal Anxiety Spring never felt like a beginning— Something, perhaps, to do with school And all the school-year's slow unspinning From wound-up time as from a spool Aimed at Summer's golden rule. Beginnings are

187. ## social studies

what forms part of the escarpment along the southern edge of the african continent

188. ## Grammar

Could you say... lend a hand in helping... or is it just..lend a hand... Because lend a hand and help both mean the same thing.

189. ## chemistry

Give the ph value to get anatase tio2

190. ## Math

I need some help!!! Multiply (Simplify your answer) (4x +5)(9x² +2x +7)

191. ## physics

At what speed should an object be projected to reach the maximum range of 200 m ?

192. ## Earth Science

I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters 5 2:40 1.63m 6 2:06 1.7m 11 1:17 1.86m 12 :59 1.82m 13 1:10 1.8m Please help me.

193. ## Earth Science

How do I ocnvert meters into cubic meters? For example: measuring areas and velocity I come up with this: area 1.55m x 27.47 = 42.74 velocity 21.9/172 seconds = 0.123 area x velocity = 5.22381 How do I convert 5.22381 into cms?

194. ## critical thinking

critical thinking habits of mind are always positive.

what will happen if a metal block that is 60°c is placed in water that is 20°c?

196. ## Science/Math

We have 30 grams of clay. We understand that Density=Mass/Volume. We understand that the Density of water is 1.0 and in order for the clay boat to float in the water Density needs to be less than 1.0. So my question is using 30 grams of clay what design

198. ## Math

Solve. 25x^4-15x^2+2=0

X+y+z=2200

200. ## math

f(x)=-0.092x^2+5.3x-51.2 graph f in [ 20,40,5]by[0, 30,5]