# Questions Asked onNovember 24, 2010

1. ## physics

A 2.0 m wire segment carrying a current of 0.60 A oriented parallel to a uniform magnetic field of 0.50 T experiences a force of what magnitude

2. ## chemistry

A 20ml sample of .125M diprotic acid solution was titrated with .1019M KOH.the constants for the acid are k1=5.2*10 ^-5 and K2=3.4*10 ^-10. What added volume of base does each equivalence point occur? i got .0254L for the first one and .0508 for the

3. ## math brain teaser

more it it thani what does that mean??? also: EVELATOR and: DENTURES E F

4. ## Physics

The average distance separating Earth and the Moon (center to center) is 384 000 km. Use the data in Table 7.3 to find the net gravitational force exerted by Earth and the Moon on a 3.00 multiplied by 104 kg spaceship located halfway between them (Earth

5. ## Chemistry (URGENT)

How many Al atoms thick is the aluminum foil if it is 0.00157cm thick. 1 Al atom = 286pm Convert pm to m 286pm = 2.86*10^-10m Convert m to cm 2.86*10^-10m = 2.9*10^-8cm Divide aluminum thickness and Al atom thickness 1.57*10^-3 / 2.9*10^-10 = 54138 So the

6. ## chemistry

For the voltaic cell Cr(s)/Cr3+(aq)//Ni+2 (aq)/Ni(s), list the reactions at the cathode, anode, and the overall net reaction.

7. ## world history

List the ethical concepts voiced by jesus.

8. ## physics

A u-shaped tube, open to the air on both ends,contains mercury. Wather is poured into the left arm until the water column is 10.0 cm deep. How far upward from its initial position does the mercury in the right arm rise?

9. ## chemistry

Calculate the molar solubility of MX2, if the Ksp=3.3x10^-8 how can i solve this problem?

10. ## chem

Methane is oxidized to water and carbon dioxide in a process, in which 10 % of the methane is converted to CO and 20 % is converted to formaldehyde. What is the yield of the process? How much methane do you need to produce a kg of formaldehyde? How much

11. ## math

Suppose that the population of a town is described by P=0.16t^2+7.2t+100, where P is the population in thousands and t is the time in years, ( with t=o representing the year 2000). A. what will the population be in 2010? B. what was the population in 1995?

12. ## AP Chemistry

From the following: pure water solution of C12H22O11 (m=0.01) in water solution of NaCl (m=0.01) in water solution of CaCl2 (m=0.01) in water choose the one with the a) highest freezing point b) lowest freezing point c) highest boiling point d) lowest

13. ## chemistry

calcium hydroxide is titrated with nitric acid.What volume of 0.0200 M calcium hydroxide is required to neutralize 35.00 ml of 0.0500 M nitric acid?

14. ## Physics

A bullet of mass 45 g is shot at a speed of 220 m/s into a 5.0-kg bag hanging from a string from the ceiling. The bag absorbs the bullet and begins to swing. To what maximum vertical height will it rise? Hint: Energy is not conserved as the bullet enters

15. ## chem class

The pH of a solution prepared by mixing 50.0 mL of 0.125 M KOH and 50.0 mL of 0.125 M HCl is __________. i know the answer is 7.00, but im not sure how to solve it, do i create an ice chart?

16. ## Chem

4.0 gram of ferrous ammonium sulphate, FeSO4*(NH4)2SO4 * 6H2O, is used. Since the oxalate is in excess , Calculate the theoretical yield of the iron complex. FeSO4•NH4)2SO4•6H2O + H2C2O4•2H20 --> FeC2O4 + (NH4)2SO4 + H2SO4 + 8H2O 6FeC2O4 + 3H2O2 +

17. ## physics

Find the length of a pendulum that has a frequency of 0.80 Hz?

18. ## chemistry

Ammonia gas and carbon dioxide gas react to form aqueous urea (NH2CoNH2) and water. What volume of ammonia at 25 degrees celcius and 1.5 atm pressure is needed to produce 500 g of urea?

19. ## Physics

As a comet swings around the Sun, ice on the comet's surface vaporizes, releasing trapped dust particles and ions. The ions, because they are electrically charged, are forced by the electrically charged solar wind into a straight ion trail that points

20. ## math

Helga owns a campground, and she has installed a rectangular swimming pool measuring 10m by 20m. She wants to put a wooden deck of uniform width around the pool. A. Helga has budgeted \$1920 to spend on the deck and knows that construction costs are

A container is fitted with a movable piston of negligible mass and radius r = 0.061 m. Inside the container is liquid water in equilibrium with its vapor, as the drawing shows. The piston remains stationary with a 120-kg block on top of it. The air

22. ## Physics

In a certain cyclotron a proton moves in a circle of radius 0.5m. The magnitude of the magnetic field is 1.2T. a) What is the oscillator frequency? b) What is the final kinetic energy of the proton?

23. ## Physics

A disk and a hollow spherical shell, like a basketball, are released at the same time at the top of an inclined plane. The spherical shell has a mass M and a radius R; the disk has a mass 2M and a radius 2R. If the two objects are released at rest, and the

24. ## math

The city bus company usually transports 12000 riders per day at a ticket price of \$1. The company wants to raise the tickets price and knows that for every 10 cents increase, the number of riders decreases by 400. A. What price for a ticket will maximize

25. ## maths

the length of a rectangle is 3 less than 5 times its width. Write a simpified algebriac expression for the perimeter of a rectangle. If the rectangle width is tripled and its length is doubled,the perimeter of new rectangle is 92cm greater than the

26. ## sew

reasons we control fullness

27. ## physics

A circular coil of 30 turns and radius 7 cm is placed with its plane oriented at 90 degrees to a magnetic field of 0.1 T. the fieldis now increased at a steady rate, reaching a value of 0.7 T after 5 seconds. when emf is induced in the coil

28. ## math

Boris throws a ball vertically upward from the top of a cliff. The height of the hall above the base of the cliff is approximated by the model h=65+10t-5t^2, where h is the height in metres and t is the time in seconds. a. How high is the cliff? b. How

29. ## chemistry

The pH of a solution that contains 0.818 M acetic acid (Ka = 1.76 x 10-5) and 0.172 M sodium acetate is __________. The Ka of acetic acid is 1.76 × 10-5.

draw a diagram showing the motion of a satellite around Earth. Draw the force vectors acting on the sattelite. Is the sattelite accelerating?

31. ## phy

An ordinary glass is filled to the brim with 350.0 mL of water at 100°C. If the temperature decreased to 19°C, how much water could be added to the glass?

32. ## Math(Geometry)

In the diagram below(no diagram but details will be provided), right triangle ABC and line BD is an altitude to side line AC. * Prove that (AB)^2=(AC)(AD) -When you label the triangle B should be were the right angle is C should be at the top of the

33. ## Physics

2) A solid nonconducting sphere of radius R = 5.6cm has a nonuniform charge distribution or volume charge density p= (1.41pCm^-3)r/R, where r is the radial distance from the sphere's center. a) What is the sphere's total charge? b) Calculate AND sketch a

34. ## Physics

An electric generator contains a coil of 100 turns of wire, each turn forming a rectangular loop 50cm by 30cm. The coil is placed entirely in a uniform magnetic field with magnitude, B = 3.5T and direction initially perpendicular to the coil's plane. What

35. ## Algebra II

A salesman drove from his home to a nearby city at an average speed of 40 mi/. He returned home at an average speed of 50 mi/h. What was his average speed for the entire trip? I tried this question, and apparently the answer isn't 45 mph. It's something of

36. ## Chemistry

Draw the condensed structural formula for the products of the acid hydrolysis of the following amide with HCl: CH3-CH2-C(=O)-NH2 + H2O + HCl ---> I'm afraid I don't even know where to begin with this one, help!

37. ## chemistry

What mass of KOH is necessary to prepare 799.9 mL of a solution having a pH = 11.53?

38. ## Physics

For its size, the common flea is one of the most accomplished jumpers in the animal world. A 2.1 mm-long, 0.46 mg critter can reach a height of 17 cm in a single leap. A) Neglecting air drag, what is the takeoff speed of such a flea? I don't understand how

39. ## physics

A 0.025 kg object vibrates in SHM at the end of a spring. If the maximum displacement of the object is 0.030 cm, and its period is 0.50s, what is the maximum acceleration of the object?

40. ## chemistry

The pH of a solution that contains 0.818 M acetic acid (Ka = 1.76 x 10-5) and 0.172 M sodium acetate is __________. The Ka of acetic acid is 1.76 × 10-5.

41. ## Physics

A satellite of mass 210 kg is launched from a site on Earth's equator into an orbit at 210 km above the surface of Earth. (a) Assuming a circular orbit, what is the orbital period of this satellite? (b) What is the satellite's speed in its orbit? (c) What

42. ## math

A pair of skydivers jump out airplane 5.5km above the ground. The equation H=5500-5t^2 is an appropriate model for the divers' altitude in metres at tseconds after jumping out of the plane. A. After 10secs how far have the divers fallen? B. They open their

43. ## Chemistry

Please let me know how I'm doing with the following chemistry problems. I appreciate your imput. Here's problem 1: A sample of Helium gas occupies a volume of 29.4mL AT 18deg.celcius. (a)Would the volume of this gas sample be doubled at 36deg.celcius?

44. ## math

A professional stunt performer at a theme park dives off a tower 21metres high into the water. His height above the ground at time tseconds is given by the equation h=-4.9t^2+21 a. How long does it take to reach the halfway mark?

45. ## us history

What developments in American society helped to make the racial revolution of the 1950s and 1960s possible?

46. ## programming java language

For faster sorting of letters, the postal service encourages companies that send large volumes of mail to use bar code denoting the ZIP code (see figure below). Student XXXX PO Box 34689 Jeddah 21478 KSA There are full height frame bars on each side. The

47. ## math

Suppose that the population of a town is described by P=0.16t^2=7.2t=100, where P is the population in thousands and t is the time in years, ( with t=o representing the year 2000). A. what will the population be in 2010? B. what was the population in 1995?

48. ## chemistry

pls arrange the following in their order of solubility: NH3, N2 AND CO2

49. ## Binomial

Independent samples of n1 = 400 and n2= 400 observations were selected from binomial populations 1 and 2, and x1 = 100 and x2 = 127 successes were observed. What is the best point estimator for the difference ( p1-p2) in the two binomial proportions? a.

50. ## Managerial Economics

The manager of All City realtors wants to hire some real estate agents to specialize in selling housing units acquired by the Resolution Trust Commission (RTC) in its attempt to bail out the savings and loan industry. The commission paid by RTC to the

51. ## Physics

Consider a “semi-infinite” nonconducting rod (that extends infinitely to the right only) and has a uniform charge density. Calculate the magnitude and direction of the electric field at the point, P, which is a distance of R away from the edge of the

52. ## HIS 135

CheckPoint: Johnson’s “Great Society” Kennedy’s New Frontier and Johnson’s Great Society • Like JFK, President Johnson also had a vision for his administration. His program of initiatives was called the “Great Society.” Please: o Describe

53. ## math

The city bus company usually transports 12000 riders per day at a ticket price of \$1. The company wants to raise the tickets price and knows that for every 10 cents increase, the number of riders decreases by 400. A. What price for a ticket will maximize

54. ## Physics

How does progress today differ from progress thousands of years ago?

55. ## Science

Which of the following describes the function of the central vacuole in plant cells? a. It helps reproduction b. It helps regulate water content c. It plays key role in photosynthesis d. It stores food. I think it's D. Am I wrong? 2) What are the

56. ## Chemistry - drugs

Can anyone help .. State the functional groups that the BZP and TFMPP in Party Pills and MDMA have in common. ph //-\\/CF3 / [[ ]] [ N ] \\ // < Benzine [ [ N ] / N \ \H/ [ ] \ N / (BZP) H (TFMPP) / \ 0 0 \- / //-\\ Benzene \ - / \_/Me \NHMe MDMA Ectasy Me

57. ## College Physics

A string that passes over a pulley has a 0.331g mass attached to one end and a 0.625g mass attached to the other end. The pulley, which is a disk of radius 9.50cm , has friction in its axle. What is the magnitude of the frictional torque that must be

58. ## Physics

A coordinate system (in meters) is constructed on the surface of a pool table, and three objects are placed on the table as follows: a 5.0 kg object at the origin of the coordinate system, a 12.0 kg object at (0, 2.0), and a 16.0 kg object at (4.0, 0).

59. ## Physics

What is the work done in lifting 60 kg of blocks to a height of 20m?

60. ## Biology

What are the importance of seedless plants?

61. ## Physics

Calculate the vertical distance an object dropped from rest would cover in 12s if it fell freely without air resistance.

62. ## hw

A car travels along a straight road, heading east for 1 h, then traveling for 30 min on another road that leads northeast. If the car has maintained a constant speed of 56 mi/h, how far is it from its starting position?

63. ## Biology

Fill in the correct answers: 1) Angiosperms is to flower as ______is to cone 2) Dicot is to two seed leaves as______ is to one seed leaf 3) Root is to fern as _____is to moss. Explain why mosses grow in moist areas. Thank you

64. ## Math

Use the echelon method to solve the following system. x/5+3y =31 2x-y/5=8

65. ## physics

The firetruck goes around a 180°, 162 m radius circular curve. It enters the curve with a speed of 12.6 m/s and leaves the curve with a speed of 38.8 m/s. Assuming the speed changes at a constant rate, what is the magnitude of the total acceleration of

66. ## Physics

A 15.0 g rubber bullet hits a wall with a speed of 140 m/s. If the bullet bounces straight back with a speed of 125 m/s, what is the change in momentum of the bullet?

67. ## science

Standars enthalpy Mg(OH)2 + H2SO4 = MgSO4 + 2 H2O

68. ## Hypothesis

Consider testing the hypothesis: H0:ƒÊ=100 vs. Ha:ƒÊ‚100. If the value of the test statistic is equal to 1.36, then the p-value is: A. 0.4131 B. 0.1738 C. 0.2066 D. 0.9131

69. ## Physics

A point charge of -14nC and +12nC is located 12cm along the x-axis. Determine the magnitude and direction of the electric field intensity at point P at the mid-point and 8cm perpendicular from the x-axis: p | | 8.0cm | | -14nC.---------------. 12 nC 6cm

70. ## art

The best art can cut through our tendency to experience life with complacency and prejudgment? what kind of bias is this?

71. ## physics

a snowboarder moves down a slope for which theta= 22 degrees. the coefficient of kinetic friction between the board and the snow is 0.21 and her velocity is a constant 8.3 m/s. what will her speed 100 meters past the end of the slope? how far will she

which of the following is NOT something to check during a thorough revision. style and tone organization punctuation and spelling content and clarity

73. ## programming.Java language

Write a program to plot a face. Provide a class FaceViewer and a class FaceComponent.

consider the reaction: CO(aq) + Cl2 (aq) --> COCl2 (aq). Calculate Delta G at non standard conditions. T = 298.15K. Concentration of COCl2 is reduced to 0.01832 M while the concentrations of CO and Cl2 remain 1M. Delta G rxn = -67.4 kj.

75. ## Physics

In a simulated head-on crash test, a car impacts a wall at 25 mi/h (40 km/h) and comes abruptly to rest. A 120 lb passenger dummy (with a mass of 55 kg), without a seat belt, is stopped by an air bag, which exerts a force on the dummy of 3000 lb. How long

76. ## HELP! Statistics

Which of the following statements about the margin of error is false? 1. Statisticians routinely construct interval estimates by making their point estimate the interval center and creating a range of other possible values, known as the margin of error,

77. ## physics

the distance of a girl from a plane mirror is 15m when she is standing infront of it.she can see her image behind the mirror 1- 15cm 2- 30cm 3- 45cm 4- 10

78. ## Chem

A sample of nitrogen (N2) gas has a volume of 250ml at 30 degrees C and a pressure of 745mmHg. What is the volume of the nitrogen at STP? I got 22 liters in significant figures is this right. thank you.

79. ## chemistry

For a certain reaction, Delta H(not) = -76.8 kj and delta S(not) = -217 j/k. If n =3, calculate E for the reaction at 25degrees celcius.

80. ## statistics

Estimation is best defined as: 1. a process of inferring the values of unknown population parameters from those of known sample statistics 2. a process of inferring the values of unknown samples statistics from those of known population parameters 3. any

81. ## physics

A 50.0 kg girl bounces up and down on a pogo stick. The girl has an instantaneous acceleration of 2.0 m/s^2 when the displacement is -8.0cm. What is the spring constant of the pogo sticks spring?

82. ## phys

A 1155-N uniform beam is attached to a vertical wall at one end and is supported by a cable at the other end. A W = 1915-N crate hangs from the far end of the beam. (a) Using the data shown in the drawing, find the magnitude of the tension in the wire. (b)

83. ## math

Hello I need help with scientific notation please 0.00000586

84. ## Physics

A 14000 N automobile travels at a speed of 50 km/h northward along a street, and a 7500 N sports car travels at a speed of 62 km/h eastward along an intersecting street. (a) If neither driver brakes and the cars collide at the intersection and lock

85. ## Physics

When tossed upward and hit horizontally by a batter, a 0.23 kg softball receives an impulse of 2.0 N·s. With what horizontal speed does the ball move away from the bat?

86. ## chemistry

why is this reaction spontaneous? Mg + 2Cu2+ --> Mg2+ + 2Cu+ Mg2+ + 2e --> Mg E= -2.37 V Cu2 + e --> Cu+ E= 0.15 V

87. ## science

Sir, the farm I am working had a death in one of the horse which lab has confirmed it as Rabies. We have large number of animals which have been tied with this animal since last few months where as the horse showed sign of pyrexia and died in two days

88. ## US History

1. The legislative agenda of Carter Administration during its first two years: A. was successful B. was criticized by many cabinet members for not attempting to introduce enough important legislation. C. was criticized by Congressional leaders for

89. ## physics

a pond of water filled with water apto 60m. 1)write formulato find the pressure of water exerted on the base of pond. 2)calculate the pressure exerted by the water on the base of pond?density of water is 1000kg/m3 3)half of the water was removed from the

90. ## algebra

Hoc can the factoring of 9x to the second power plus 18x plus 8, help factor 9a to the second power plus 18a plus 8b to the second power.

Terry realizes that the draft of her memo announcing a new suggestion system mentions who will be evaluating the suggestions on both the first and second page, so she deletes the second reference and adds a little more to the first. What part of the

92. ## English

1. I will be 14 years old next year. 2. I shall be 14 years old next year. 3. I am going to be 14 years old next year. 4. I intend to be 14 years old next year. (Are they the same? What is the difference between 'will' and 'be going to'?)

93. ## Maths

A rectangle has legth & width in the ratio of 3:2.If the length is increased by 8 & width is increased by 50%.The ratio of new perimeter to origial perimeter is 8:5.Find the area of new rectangle.

94. ## english

how does the structure of the poem affect the meaning of the poem..or contribute to the poem THank u soo much :)

95. ## spanish

"¿Qué me dices?" "____ que tengo razón." a. Os decimos b. Me dices c. Le dices d. Te digo D?

96. ## Biology

Are club mosses gymnosperms? ex. horse tail (ferns) What are club mosses used for? Thank you

97. ## physics,plz.....give me answer as soon as possible

a pond of water filled with water apto 60m. 1)write formulato find the pressure of water exerted on the base of pond. 2)calculate the pressure exerted by the water on the base of pond?density of water is 1000kg/m3 3)half of the water was removed from the

98. ## thermal energy

1a. what is the rate of energy loss in wattm^-2 through a glass window 3.00mm thick if the outside temp is -20^0c and inside temp is 25^0c. b.) A storm window having the same thickness of glass is installed parallel to the first window with an air gap of

99. ## Chemistry

I know that vanillin has the functional groups aldehyde, ether, and phenol. My assigment says there is a fourth. Which one am I missing?

100. ## physics

A 0.11kg mass is vibrating at the end of a horizontal spring along a frictionless surface. If the spring constant is 0.52 N/m, what is the displacement of the mass when the acceleration of the mass is 0.25m/s^2?

During a group meeting whrn they are each reading a draft of their formal reports, they realize that sometimes they have used the word "there' correctly and sometimes the word should be "their" They use their word processor's "find" features to help them

102. ## physics

a bus having mass of 3000kg is moving at 30m/sec.find the momentum of the bus. 1)at the starting point from rest. 2)at the final state while motion at 30m/sec. 3)find the difference of moment in above (1) and (2)

103. ## Chemistry

How do I separate a mixture of liquids?

104. ## college physics

A car starts from rest on a curve with a radius of 190 and accelerates at 0.300 . How many revolutions will the car have gone through when the magnitude of its total acceleration is 2.00 ?

105. ## math

Please and this one 234,000,000 it scientific notation

106. ## physics

A mass of 1.00kg is dropped from a height of 80cm onto a spring, of unstretched length of 20.0cm, which is resting on the floor. It comes to rest, momentarily, at a height of 10.0cm from the floor. If we can ignore friction, find the spring constant of the

107. ## geometry

Two chords intersect a circle. The shorter chord is divided into segments of lengths of 9 inches and 12 inches. The longer chord has a length of 24 inches. Find the length of the shorter portion of the longer chord .

108. ## english 12

i have a poetry analysis tomorrow is there any websites that will help me also does anyone know how to figure out what exactly the imagery is in a poem..how can we make out it is an imagery , any examples..thank you A MILLION tyms

109. ## maths

A rectangle has length & width in the ratio of 3:2.If the length is increased by 8 & width is increased by 50%.The ratio of new perimeter to original perimeter is 8:5.Find the area of new rectangle

110. ## Physics

A 14000 N automobile travels at a speed of 50 km/h northward along a street, and a 7500 N sports car travels at a speed of 62 km/h eastward along an intersecting street. (a) If neither driver brakes and the cars collide at the intersection and lock

111. ## math

a drinking straw of length 21 cm is cut into 3 pieces. the first length is x cm. the second piece is 3 cm shorter than the first piece. the third piece is twice as long as the first piece. state in terms of x the length of each of the pieces.

112. ## HEALTHCARE

How does the specialization of providers and hospitals affect continuity of care?

113. ## US history questions

CAN SOMEONE CHECK THESE QUESTIONS, I'M NOT 100% CONFIDENT IN MY ANSWERS? PLEASE THANK YOU! US-Soviet relations during the early years of Reagan Administration: A. improved because NATO decided not to deploy cruise missiles in Europe. B. changed little

114. ## physics

a)a box having mass of 500kg is placed on a horizontal surface.find the pressure exerted on the surface?do not forget to write formula. b)a pond of water filled with water upto 60m.1)write formula to find the pressure of water exerted on the base of

115. ## Physics

A 2.1 mm-long, 0.46 mg house flea can reach a height of 17 cm in a single leap. I've found that, neglecting air speed, v = 1.8 m/s How do I calculate the kinetic energy of this flea at takeoff & its kinetic energy per kilogram of mass? (to get K = __ J)

116. ## Geometry

How can I find the Intersection between 3x -2y =6 and 5x +7y =41?

117. ## Chemistry

Which one of these has the smallest # of hydrogen atoms? a) Butyne b) Butane c) Butyne d) Cyclobutane Is the answer c)?

118. ## medical

so my friend said hes tired and he was like "yeah i think i got the itis :p" what is itis?

119. ## Math

Give vertex, axis, x-intercepts and y-intercepts to parabola y= -3x^2-6x+4

120. ## World History

Basically we had to come up with our own topic with the realm of East Asia. We also had to keep it before the 20th century. I have decided to write on Political Factionalism in the Yi Dynasty. It's a mother load of a paper, 2500/3000 words. I was thinking

I need to write an equation of the line containing the given point and parallel to the given line. in y = mx+b. (-6,2;) 6x=5y+4

122. ## physics

a bus having mass of 3000kg is moving at 30m/sec.find the momentum of the bus. 1)at the starting point from rest. 2)at the final state while motion at 30m/sec. 3)find the difference of momentum in above (1) and (2)

123. ## Caculus

integrate x^(1/2)e^x.dx from 0 to 4, n=12 1) the trapezoidal rule

124. ## college

CAN YOU GIVE ME A BEST ORATORICAL PIECE ABOUT NURTURING THE YOUTHS??

125. ## physics

a coconut is falling from a palm tree which of these is correct? velocity of coconut p.e of coconut 1-decreasing decreasing 2-increasing decreasing 3-increasing increasing 4-decreasing increasing

126. ## physics

1)if angle of incidence is 56 and it is decreased by 15 dagree then draw the path of a ray by drawing a diagram by using exact value of angle of incidence and angle of refraction.as refractive index of glass is 1.5. 2)name the phenomenon of light which u

127. ## English

1. I am going to try an English club. 2. I am going to join an English club. (Does 'try' mean 'join'?)

128. ## US history

US-Soviet relations during the early years of Reagan Administration: A. improved because NATO decided not to deploy cruise missiles in Europe. B. changed little despite the positive messages sent from the new Soviet leader Andropov. C. worsened because the

129. ## Chemistry

What is the use of a Bunsen burner? In short please. Thank you

130. ## American History

I need to write a story about a Patriot during the American Revloution and I have NO idea what to write. I don't even know anything about the American Revolution. Help!

131. ## logical framework

Hello I need to write an essay about the logical framework.I do not know how to start. I need to answer if the logical framework is the mastertool in project cycle management. can someone give me some indications. thank you

132. ## Access Nested IIF statement

Could someone please help me with my nested IIF statement? I am getting different errors for i such as "wrong number of arguments" and "missing bracket or closing parentheses." When I start adding parentheses then it will say wrong # of arguments. Any help

133. ## Statistics

A large video rental chain recently decided to change its rental policy, allowing an unlimited return date instead of requiring that movies be returned the next day. The marketing team reasoned that this would greatly increase the popularity of their

134. ## math

How long in years does it take for a principal to triple in value if invested at a rate of r compounded semi-annually? Give t as a function of r.

135. ## math

what is the domain of the following relation? {(-1, 2) , (2,5), (4,9), (6, 11)}

137. ## algebra

Can someone help me explain how factoring is used to solve quadratic equations? I can't find an explaination anywhere.

138. ## science

A young man happens to spot an ex-girlfriend he’s trying to avoid. Why does his mouth become dry? A. His cervical plexus overrides the parasympathetic stimulation for saliva production. B. His cranial nerves shut down saliva production. C. His central

139. ## Statistics

The prediction equation for predicting y (pain indicator) from X (drug dosage) is y = 2.5X + 18. What is the observation mean for Y if ìX = 40 and óx square = 81?

140. ## physics

which two object have masses 20kg and 15kg are placed on a plane surface.Both have same area.Which one is the correct answer for pressure. 1)20kg mass least pressure 2)15kg mass least pressure 3)20kg mass most pressure 4)both have same pressure

141. ## Statistics

The prediction equation for predicting y (pain indicator) from X (drug dosage) is y = 2.5X + 18. What is the observation mean for Y if uX = 40 and óx square = 81?

142. ## Psychology

Elisa is a teenage girl who has trust issues with others. She does not like to tell individuals every fact of her life. What could Elisa do to help her trust people more and just be open with them? ok. I think that maybe she could start practising at home

143. ## PHILOSOPHY

What are your views on Free will and determinism? 1. The behavior of atoms is governed entirely by physical law. 2. Humans have free will. Do you accept both (1) and (2)

144. ## physics

A 3640 lb roller coaster experiences a constant air-resistance force of 26 lb and a constant friction force of 20 lb. What initial velocity is required for the coaster to make it around the 0.57 mile track and coast to a stop at its starting location?

145. ## spanish

"Mamá, quiero saber qué me dan tú y papá." "Yo,____ unos aretes de México; el regalo de papá va a ser una sorpresa." a. te damos b. te doy c. me dan d. le dan B?

This is a question of my last biology test: Name at least one technological device that would have not been invented without scientific knowledge: A.Radio B.Ruler C.Knife D.None of the above I answered D but got a cross for it. So can you please help me to

147. ## Biology

What are the benefits of antibiotic for human being?

148. ## Biology

What are the conditions that should be kept constant when we are growing seeds? ex. The place of plant and etc?

149. ## history

1. Free elections in Poland: A. were not very significant B. demonstrated clearly that the Cold War was ending. C. showed that Solidarity was not really all that influential and that people would not turn their back on Communist government. D. were rigged

150. ## Biology

Explain why would there be more white blood cells found in a person's body who is infected by salmonella bacteria rather than a healthy person?

151. ## Chemistry

Explain the important conditions when you crystallize a solid by crystallization.

152. ## physics

A 3640 lb roller coaster experiences a constant air-resistance force of 26 lb and a constant friction force of 20 lb. What initial velocity is required for the coaster to make it around the 0.57 mile track and coast to a stop at its starting location?

153. ## Math

Solve each equation. Round decimal answers to the nearest thousandth. 5(0.10)^x = 4(0.12)^x

154. ## physics

At a temperature of 0° C, the mass and volume of a fluid are 742 kg and 1.10 m3. The coefficient of volume expansion is 1.36 10-3(° C)−1

155. ## SOCIAL

Previously, the primary means of protecting individuals was to limit government intervention in their lives. Today is the era of aggressive industrial capitalism, the government seems to be the only way to protect the individual from selfish economic

156. ## Algebra

Find the equation of a line parallel to the line y=3/4x-5?? I am not sure how to do this problem, can someone Please help :) Thank You in advance!

157. ## college

Which comqound boils at 77.5 degree c

158. ## Algebra

The value of a 1950 Jefferson nickel is 8/5 the value of the 1945 nickel. Together the value of the two coins is \$91. What is the value of each coin?

159. ## English

I forgot to include the following statements. Tahnk you for you help. 1) News is brought that Antonio's ships had been lost (had sunk?) at sea. 2) The Jews were restricted in the jobs they could do. 3) The actors entered (went on stage) from (through?) two

Input-c-3,2,5,15,1,6,30 output-w-10,15,6,2,30,5,1 write the rule for each function . Write the rule as an equation. PLEASE HELP

161. ## physics

a box having mass of 500kg is placed on a horizontal surface with 120cm lenght and 60cm width.find the pressure exerted on the surface?also write the formula.

162. ## Math

Use the Gauss-Jordan method to solve the equation: 3x-5y-2z=-9 -4x+3y+z=11 8x-5y+4z=6

163. ## US history

US-Soviet relations during the early years of Reagan Administration: A. improved because NATO decided not to deploy cruise missiles in Europe. B. changed little despite the positive messages sent from the new Soviet leader Andropov. C. worsened because the

164. ## physics,plzzz....be fast

1)the cart has a mass of 50kg it moves with a speed of 35cm/sec. *)find the speed of cart in m/sec. *)find the kinetic energy of the cart? 2)an IGCSE student was calculating the power of the cart.he wanted to apply the formula of power.which formula did he

165. ## ENGLISH

Elisa is a teenage girl who has trust issues with others. She does not like to tell individuals every fact of her life. What could Elisa do to help her trust people more and just be open with them?

166. ## Science =____= ASAP!!!

Is Adding Vinegar to Yeast A Physical or a Chemical Change????

167. ## spanish

"Qué les dan Uds. a los gemelos para su cumpleaños?" "Generalmente ________ dinero." a. les damos b. les dan c. nos damos d. les doy D?

168. ## Physics

Write each number in scientific notation: 1) 15.01 ans. Is it 15.01 x 10 minus to the power of 2?? Am i wrong?

169. ## English

1. You know that restaurant round/around the corner? It's closed down. 2. You know that restaurant round/around the corner? It's closed now. (Are both sentences grammatical? Are both the same? Do we have to use 'round' or'around'? Are both OK?)

170. ## algebra

If you have a Pelican that weigh 30lb how would you find the wingspan of the Pelican with the rational exponent equation L=2.43*W^0.3326

171. ## English

Why do miracles come true and happen for the right people?

172. ## physics

in a vessel of 40 cm3 of water at 4 ° C is introduced aluminum over 80g to 8 º C. neglecting the effect of the vessel, calculate final temperature

173. ## Math

In simple annuities, why is the amount of payment for the first deposit R(1+i)^n-1? Shouldn't it be n?

174. ## Statistics

A popular casino in Windsor estimates that the chance that someone sitting at one of their Black Jack tables has a 0.35 probability of winning a given hand. Assume that all games played are independent. a. Isaac decides to play until his first win, and

175. ## Chemistry

Which compound has the formula HC(=O)-O-CH2-CH3?

176. ## US History

I'm doing a song about Italian Immigration from the 1800's for a project nd I'm kind of stuck. Can someone help me out? What I have is this: Hey fratello, wish me luck Hey sorella, I’m awestruck Hey there Nonno, I’m earning bucks In the land of

177. ## science

can a body topple on a frictionless surface? Rply early, i m waiting for your response!

178. ## English

1. They are going to seek new members. 2. They are going to seek for new members. (Are both OK?)

179. ## physics

which one of the property is true for mirror 1-refraction 2-refletion 3-communication 4-measuring length 5-gravity 6-heating object

180. ## math

how do you determine an equation of a parabola in standard form.

181. ## Operating Systems

Using the COBEGIN and COEND expressions how would I rewrite these expressions 1.H^2*(0*(N+T)) 2. X*(Y*Z*W*R) 3. M*T*R

182. ## college algebra

g(x)= {x+6, x is less or equal to -4 {1/2x -4, x> -4

183. ## physics

Posted by sandhu on Wednesday, November 24, 2010 at 4:29am. The firetruck goes around a 180°, 162 m radius circular curve. It enters the curve with a speed of 12.6 m/s and leaves the curve with a speed of 38.8 m/s. Assuming the speed changes at a constant

184. ## Social Studies ASAP!!!

What were the 5 MAIN IMPORTANT Acts which led to the American Revolution???

185. ## chemistry

in a recipient of 40 cm^3 of water at 4°C is introduced aluminum over 80g to 8ºC. neglecting the effect of the recipient, calculate final temperature

186. ## science

What are the hard and fast rules of Science, if any?

187. ## HIS 135

Explain how Johnson’s “Great Society” was similar and/or different from Kennedy’s vision.

188. ## statistics

An experiment with results acquired showed that at the beginning the temperature was 20 degrees and the size of bacteria was 1 mm long. 12 hours later the temperature was 56 degrees and the size of the bacteria was 12 mm long. Create a graph showing the

189. ## English

what is the difference between SEQUENTIAL POEMS and NARRATIVE POEMS ..please could you give explanation and not a website link thanks :)

190. ## science

What is the final temperature when you mix 40ml of 40degree celcius water and 25ml of 20 degree celcius water?

191. ## Physics

Why does tension in a rope increase as the rotational speed of a ball increases?

192. ## Math

How many centiliters of pure acid must be added to 6 centiliters of a 50% acid solution to obtain a 70% solution?

193. ## Dufferential equation-Plz

C = 15*pi*(2*D*h+(3/4)*D²) + L* (94.25*D*h+35.34*D^2)/(pi*D^2*h/4) first dC/dD? second d^2C/dD^2? first dC/dh? second d^2C/dh^2

194. ## English

1. I will go there. 2. I shall go there. 3. I intend to go there. (What does #1 mean? Does #1 mean #2 or #3?)

195. ## MATH

in a bag there are 3 different marble colors. what is the minimum marble does one have to remove in order to get 3 marble of the same color? * i know this is a probability question but since it does not give you the individual amount i don't think i can

196. ## physics

An RC car has a power rating of 12 W and a mass of 1.0 kg. How long would it take to reach 5 m/s ? thanks.

197. ## chemistry

Calculate how much Hg in a reaction that produces 87.4 g O2 using: 2HgO produces 2 Hg + O2

198. ## math

subtraction of fraction 5 1/3- 2 11/12 = 5 /12 - 2 11/12 = 4 /12 - 2 11/12 =

199. ## scince

how many bones are in a body

200. ## English

Can you please check if the following statements are possible? Thank you very much. 1)The mythologies describe the Druids as having magical powers such as divination and shape-changing themselves into the forms of animals (not into animals' forms?)

201. ## college algebra

g(x)= {x+6, x is less or equal to -4 {1-2x -4, x> -4

202. ## science

how long would it take to trvel to neptune going 10000 mph

204. ## math

subtraction of fraction 6 1/8 - 3 1/2

205. ## math

is there any one there............