Questions Asked on
February 9, 2013

  1. physical sciene

    Neglecting air resistance, how fast is the object traveling when it strikes the gounnd at the end of 3.8s?

    asked by Brandy
  2. MATH

    Find the diameter of a circle with a circumference of 50 mm. Round your answer to the nearest tenth.

    asked by Anonymous
  3. Calculus

    I've been working on this problem for while, and I keep getting the answer wrong every time I do it. The volume of the solid obtained by rotating the region enclosed by y=e^(5x+1) y=0 x=0 x=0.8 about the x-axis can be computed using the method of disks or

    asked by Anonymous
  4. maths

    a rectangular plot of grass 25m by 22m has a gravel walk 1.5m wide all around it on the outside.What is the area of the gravel walk?

    asked by dheemanth
  5. Calculus

    The region between the graphs of x=y^(2)and x=2y is rotated around the line y=2. The volume of the resulting solid is... I've tried this five times and no luck. Please help. I think my a=o and b=2. I would appreciate the help.

    asked by Confused
  6. math

    tom receives 4 different shirts and 4 different ties for his birthday.how many different combinations of shirt and tie could he wear?

    asked by ceetah
  7. math

    mark makes easter eggs.each egg contains 6 toffees,the toffees being selected from 3 different sorts.how many different selections are possible if each egg must contain at least one toffee of each sort?

    asked by ceetah
  8. math

    if i write the whole numbers from 1 to 500 in a row,what will be the 1000 th digit that i write?

    asked by ceetah
  9. statistics

    A local country club has a membership of 600 and operates facilities that include an 18-hole championship golf course and 12 tennis courts. Before deciding whether to accept new members, the club president would like to know how many members regularly use

    asked by Sandy
  10. community umuokpu

    if 50cm3 of co2 were put in 40cm3 of Oz. Determine the gas that would be in excess and calculate the volume of the gas that would be used

    asked by Tessy
  11. Math

    Show that tan(45/2)=2^1/2 - 1

    asked by Tommyt
  12. physics

    the effective resistacce of two resistors connected in series is 100 ohm.when it connected in parallel it is 24 ohm.determine the values of two resistors

    asked by yzr
  13. maths

    factorise 15a^2b^2-20ab+8

    asked by tuhituhi
  14. maths

    the perimeter of a rectangle is 340 cm.if its length is decreased by 10% and breadth is decreased by 20% .we get the same perimeter.find the length and breadth of the rectangle.

    asked by tuhituhi
  15. maths

    if Arvind cycles 10km/hr ,he reaches the school late by 4min,/if he cycles 12km/hr,he reaches the school early by 2min,find the distance of the school from his home.

    asked by tuhituhi
  16. physics

    three point charges of 3µC, 8µC and -5µC are located at the corners of an equilateral triangle. calculate the net force on the 8µC

    asked by garvin
  17. maths

    on selling a bag for rs.704, a shopkeeper suffers a loss of 12% at what price should he sell it to gain 7.5%

    asked by tuhituhi
  18. algebra

    An airplane over the Pacific Ocean sights an atoll at an 7° angle of depression. If the plane is 663 m above the water, how many kilometers is it from a point 663 m directly above the atoll?

    asked by Anonymous
  19. maths

    7z-2[3(x-2y)-4{2z-(2y-3y-3x-5z)}]

    asked by tuhituhi
  20. maths-urgently needed

    A moneylender 's income decreased by Rs.60 when the rate of interest dropped from 8%p.a to 31/4%p.a.What was his principal

    asked by Anonymous
  21. physics

    `A golfer strikes the ball as shown. Letting, α = 23 °, β = 41°, and the initial speed v0 = 6 m/s, determine the x and y coordinates of the place where the ball will land

    asked by Anonymous
  22. math

    lucy wants to arrange 4 dolls on the shelf,one from spain,a doll from china,one from indonesia and one from mexico.how many different ways are there?

    asked by ceetah
  23. math

    a chairman and vice-chairman are to be elected from 7 candidates.how many different results are possible ?

    asked by cara
  24. lindy

    how many different flags can be made? if there are 5 colors,but the flag must have 3 bands of color

    asked by cara
  25. math

    we design a new flag.they are 5 colors,blue,red,green,orange and yellow.the flag must have 3 bands of color,how many different flags can be design ?

    asked by karen
  26. math

    6x=-36

    asked by amanda
  27. phy

    a watermelon seed has the following coordinates: x= -5.0, y = 8.0m, and z = 0m. find its position vector (a) in unit-vector notation and as (b) a magnitude and (c) an angle relative to the positive direction of the x axis (d) sketch the vector on the

    asked by stephen
  28. maths-urgently needed

    if p(x) = px^7 + qx^3 + rx - 5 where p , q , r are constants , if p(-7) = 7 then p(7) = ?

    asked by Anonymous
  29. Geometry

    What is another way to figure out the area of a complex figure?

    asked by Ryan
  30. math

    divide 1.702 by .06 gave answer correct to two decimal places.

    asked by lara
  31. Pure Mathematics

    1. Given that the straight line y=c-3x does not intersect the curve xy=3, find the range of values for c. 2. Find the range of values for c for which the line y=cx+6 does not meet the curve 2x^2-xy=3. 3. Find the range of values for k for which 8y=x+2k is

    asked by Kerry-Ann
  32. Oceanography

    why the northeast and southeast trade winds are steady in strength and direction year round but the Northern Hemisphere westerlies alternate from northwest to southwest with summer and winter along the west coast of the United States.

    asked by kim
  33. Oceanography

    How do hurricanes produce storm sures? Why is a storm surge more severe along a coast with a side, shallow continental shelf than along a coast with a narrow continental shelf?

    asked by kim
  34. Oceanography

    why on the world average. Earth’s. atmosphere is in motion. Take into consideration the distribution of earth’s surface area with latitude and the variation in heat loss and heat gain with latitude.

    asked by kim
  35. arithmetic

    determine the secon termof an A.P whose sixth term is 12 and eighth term is 22?

    asked by dany
  36. Business Law

    Regan marries at age 17. Then, she enters into a contract with Art to purchase an automobile for $10,000. She later changes her mind and wants to void the contract. Which of the following is true? A. Regan can't void the contract because she is over 15. B.

    asked by Kathleen S
  37. Business Law

    Jackie tells a group of friends that she plans to sell her home. Meg asks how much Jackie hopes to get for the house, and Jackie replies, "$50,000." Meg says, "I accept your offer. I'll purchase your house for $50,000." No contract exists because A. Jackie

    asked by Kathleen S
  38. Business Law

    Regan marries at age 17. Then, she enters into a contract with Art to purchase an automobile for $10,000. She later changes her mind and wants to void the contract. Which of the following is true? A. Regan can't void the contract because she is over 15. B.

    asked by Kathleen S
  39. Business Law

    Carrie decides to offer Shelley the opportunity to purchase her motorcycle for just $500. Carrie told Jim, a mutual friend of Shelley and her, that she intended to make the offer. Later, Carrie changes her mind. Shelley approaches Carrie and says she

    asked by Kathleen S
  40. Business Law

    Juan thinks he would like to purchase Tara's house, but doesn't know whether he will be able to save enough money for a down payment on a loan. Juan agrees to give Tara $5,000 for the option to purchase her house for $150,000 sometime within the next five

    asked by Kathleen S
  41. Life Orientation

    What,according to the BCEA applies with regard to the contravention..refers to Thembi's case study

    asked by Mariah S
  42. math

    In the U.S., 4634 million pounds of apples were consumed in 2002. The population of the U.S. in that year was 290 million. 1. a medium apple weighs about 5 ounces. estimate how many apples a family of four would have consumed in one month.

    asked by anon
  43. Science

    what power is expended by a weightlifter when lifting a 60kg barbell a vertical distance of 1.1m in a time interval of 2.0s

    asked by Joyce
  44. mechanics of materials

    6. A flat plate specimen of a soft metal alloy is to be tested by pulling on round pins inserted through the ends of the plate, as illustrated below (a) Calculate the required diameter of the pins, given that the plate is 8.0 mm thick, the maximum tensile

    asked by dmkp
  45. mechanics of materials

    A cylindrical tank with flat endplates is constructed from two sections that are welded together circumferentially.The outer diameter of the tank is 1.20, and the wall of the tank is 20.0 mm thick and the mamimum internal pressure is 2.00 MPa. (a)

    asked by dmkp
  46. Chemistry

    The main reason for the increase in reaction rate with temperature is that: The activation energy increases rapidly with temp (I think it is this one) A 10 C temp rise results in the rate doubling heats acts as a catalyst or The fraction of high-energy

    asked by Linda
  47. Math

    The sixth term of an arithmetic progression is 265 and the sum of the first 5 terms is 1445. Find the minimum value of n so that the sum of the first n terms is negative.

    asked by azmeerahim
  48. English

    make a poem on rain, first word of all lines verticaly MUSKAN Like: M................. U.................. S................... k.................... A.................... N...................

    asked by Muskan
  49. Chem

    Elements with similar properties Answer occupy the same period of the periodic table have similar electron configurations have the same number of neutrons in their nuclei exist in the same physical state (solid, liquid, or gas)

    asked by Anonymous
  50. Boolean Algebra

    I need help starting this, I don't want a plain answer just a what to do. (bc'+a'd)(ab'+cd')-Simplify My best guess is to use the distributive property. (a+b)(a+c)= a(b+c). But now that there is a 4th variable what do I do?

    asked by Anonymous
  51. mechanics of materials

    6. A flat plate specimen of a soft metal alloy is to be tested by pulling on round pins inserted through the ends of the plate, as illustrated below (a) Calculate the required diameter of the pins, given that the plate is 8.0 mm thick, the maximum tensile

    asked by dmkp
  52. mechanics of materials

    A cylindrical tank with flat endplates is constructed from two sections that are welded together circumferentially.The outer diameter of the tank is 1.20, and the wall of the tank is 20.0 mm thick and the mamimum internal pressure is 2.00 MPa. (a)

    asked by dmkp
  53. Physics

    A person who is 1.1 m tall throws a ball with a speed of 3.5 m/s at an angle of 52 degrees above the horizontal. What are the x and y components of the velocity (in m/s) of the ball the instant before it strikes the ground? The acceleration due to gravity

    asked by Adaija
  54. physics- vertical circular motion

    For the normal force in the drawing to have the same magnitude at all points on the vertical track, the stunt driver must adjust the speed to be different at different points. Suppose, for example, that the track has a radius of 2.06 m and that the driver

    asked by Anonymous
  55. math

    A box with an open top is to be constructed from a rectangular piece of cardboard with dimensions W inches by L inches by cutting out equal squares of side x at each corner and then folding up the sides. (W = 12 in. and L = 20 in). Find the values of x for

    asked by tom
  56. statistics

    a towns snowfall in december averages 13 inches with a standard diviation of 8 inches while in february the average snowfall is 40 inches with a standard deviation of 13 in which month is it more likey to snow 32 inches. explain

    asked by amy
  57. stats

    suppose you are to form a scatterplot oby collecting data for the given pair of variables. determine the likely direction form and strngth. Student: high grade point average, student: studying consistency

    asked by amy
  58. Spanish

    This is a paragraph in which I am practicing the two uses of "se"--se pasiva and se impersonal. I did exercises with it first and now I am trying to see if I have them correct in "natural" writing. I would be very grateful to have it proofread! Thank you.

    asked by QL
  59. math

    Find the area of a parallelogram: base 5.2 cm, height 2.3 cm. 10.6 cm² 12.96 cm² 5.98 cm² 11.96 cm² I think its the last option is that right?

    asked by someone unknown
  60. A&P

    what would happen if there were no negative feedbsck control on growth and thyroid hormone

    asked by rochelle
  61. college algebra

    Write an equation of the line parallel to the line given by 3x-2y=8 and having the same y-intercept as the line given by 2y+3x=-4 (show work) I am stuck with this problem. Can you please show me how to do these types of equations? Thank you

    asked by Clay
  62. math

    Find the area of a triangle: base 14 cm, height 5.5 cm. 19.5 cm² 77 cm² 38.5 cm² 770 cm² i think its either 38.5 or 77

    asked by someone unknown
  63. chemistry

    What is the molarity of an HCl solution if 14.0mL HCl solution is titrated with 22.6mL of 0.155 M NaOH solution?

    asked by Peter
  64. Modern Physics

    A point charge \left( {m = 1.0\,{\rm{g}}} \right) at the end of an insulating cord of length 55 {\rm cm} is observed to be in equilibrium in a uniform horizontal electric field of 15,000\,{\rm{N/C}}, when the pendulum's position, with the charge 12 {\rm

    asked by Masq
  65. calculus

    A batter hits a ball 3 feet from home plate along the path x=69t, y=3+40t-16t^2. How long is the ball in flight and how far does it travel?

    asked by Heather
  66. physics

    A swimmer heads directly across a river, swimming at 1.72 m/s relative to the water. She arrives at a point 39.0 m downstream from the point directly across the river, which is 72.7 m wide. What is the speed of the river current?

    asked by Anonymous
  67. Chemistry

    A horizontal force is applied to a 2-kg ball on a smooth table. The ball's speed is 6 m/s when it has gone 3 m. The magnitude of the force is

    asked by Anonymous
  68. physics

    An astronaunt with total mass of 200 kg is working on a satellite when he accidentally pushes away from satellite . While he is holding on tona wrench . What can he do to change his direction?

    asked by Anonymous
  69. physics

    An astronaunt with total mass of 200 kg is working on a satellite when he accidentally pushes away from satellite . While he is holding on tona wrench . What can he do to change his direction?

    asked by Anonymous
  70. Chemistry

    why would the temperature be higher when making Ammonium Sulphate then when making ammonium nitrate? something to do with hydrogen ions?

    asked by Aja
  71. algebra 3

    how would you solve for this? and what is the answer? 48p^3+2p^5-p^7

    asked by nina
  72. Biology

    what kingdom does opalina belong to? and... what kingdom does rockweed belong to?

    asked by Anonymous
  73. algebra

    how do i solve y=2x-10 2y=x-8

    asked by kim
  74. Algebra

    Solve equation for y: 6y-3x=12 and then what will be the answer (-2) for x to graph a function form

    asked by PLEASEEEE
  75. math

    a box contain 60 oranges.3/5 of the oranges were equally shared among 4 boys.how many oranges did each boy received.

    asked by simon
  76. math

    a woman had 400 oranges in a basket. after selling 1/5 of them, she found that 1/8 of the remainder were bad. how many of the remainder were good?

    asked by leanna
  77. Probability

    An Adviser has 9 products he wants to tell a client about, but only has time to tell him about 4. How many different ways can he give the details on 4 different products to the customer?

    asked by Betty
  78. Probability

    An advisor offers 8 mutual funds in the high risk category, 7 moderate, 10 in low risk. The investor decides to invest in 3 high risk, 4 moderate risk, and 10 low risk. How many ways can he do this?

    asked by Betty
  79. Probability

    5 selected from batch of 50 produced, if one is found defective, than each is tested individually. Find the probability that the entire batch will need testing if the batch contains: 8 defective phones 2 defective phones

    asked by Betty
  80. geometry

    the diagonals of a rectangle are 8 units long and intersect at a 60 degree angle. find the dimensions of the rectangle

    asked by kathy
  81. Chemistry

    Biphenyl, C12H10, is a nonvolatile, non ionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 14.3 g of biphenyl in 25.8 g of benzene?

    asked by Felicia
  82. chemistry

    A solution of H2SO4(aq) with a molal concentration of 6.25 m has a density of 1.300 g/mL. What is the molar concentration of this solution?

    asked by Felicia
  83. mechanical properties of materials

    A flat plate specimen of a soft metal alloy is to be tested by pulling on round pins inserted through the ends of the plate, as illustrated below (a) Calculate the required diameter of the pins, given that the plate is 8.0 mm thick, the maximum tensile

    asked by dmkp
  84. Chemistry

    A student mixes 85.1 g of water at 69.6°C with 58.1 g of water at 22.0°C in an insulated flask. What is the final temperature of the combined water?

    asked by John
  85. mechanical properties of materials

    A cylindrical tank with flat endplates is constructed from two sections that are welded together circumferentially.The outer diameter of the tank is 1.20, and the wall of the tank is 20.0 mm thick and the mamimum internal pressure is 2.00 MPa. (a)

    asked by dmkp
  86. community umuokpu. Chemistry

    if 50cm3 of Co2 were put in 40cm3 of O2. Determine the gas that would be in excess and calculate the volume of that would be unused

    asked by Tessy
  87. statistics

    the mean scale score on the mathematics examination of ninth grade students in new york state was 86 with a standard deviation of 5 points. Given a student was selected at random what is the probabilty that his score was 91 or higher?

    asked by kelly
  88. community umuokpu. Chemistry

    if 50cm3 of Co2 were put in 40cm3 of O2. Determine the gas that would be in excess and calculate the volume of that would be unused

    asked by Tessy
  89. community umuokpu. Chemistry

    if 50cm3 of co3 were put in 40cm3 of O2. Determine the gas that would be in excess and calculate the volume of gas that would be unused

    asked by Tessy
  90. English

    Is this grammatically correct? "I can't believe that I'm growing up so fast."

    asked by Emma
  91. Math

    Instructions Suppose we have a sequence (1), (2, 3), (4, 5, 6). (7, 8, 9, 10), (11, 12, 13, 14, 15), ... where (1) is the first element of the sequence, (2, 3) is the second, etc. What is the first number in the 100th element of the sequence? Be sure to do

    asked by Stinkrat
  92. physics

    A 0.4 kg hockey puck moving at 30 m/!@#$%^&s a straw bale, stopping in 1.4 s. What impulse was imparted to the hockey puck?

    asked by bryan
  93. chemical water treatment

    a solution is made up of 0.001M dichloroacetic and 0.0001M acetic acid.find the pH using the charge balance

    asked by tsogwane
  94. calculus

    Using Young’s rule, if the patient is 3 years old, how much Pepcid is given per dose?

    asked by wartue
  95. statistics

    A set of data consists of 90 observations between 350 and 950. a) What rule would you use to find the number of classes? Use this rule to determine the number of classes? b) What formula would you use to determine the class width or length? Use that

    asked by pat
  96. math

    when a ball is dropped, it bounces back up 4/5 of the height from the height it was dropped.If the ball dropped from a height of 200cm, how high does it go after bouncing twice.

    asked by leanna
  97. Science (8th grade)

    I am doing a lab and I really need help! I calculated that my snail traveled as his average speed of .136 cm/s, 1.36m/s, and 4896 m/hr. Does that sound right? Also I need help on another thing. My paper says Calculate how long it will take your snail to

    asked by Ji
  98. Pre-calculus

    a) A particular ball always rebounds 3/5 the distance it falls. If the ball is dropped from a height of 5 meters, how far will it travel before coming to a stop? Explain the reasoning. b) Prove that if a1, a2, a3, ... is a geometric sequence,then ln(a1),

    asked by John
  99. math

    Petrus shared his birthday cake with 5 of his friends. He gave Sandy 1/8,Mary and Paul 1/10 each.he gave Jack 1/5 and Sandy 3/20. What fraction of the cake had he left?

    asked by iris
  100. Statistics

    5 selected from batch of 50 produced, if one is found defective, than each is tested individually. Find the probability that the entire batch will need testing if the batch contains: 8 defective phones 2 defective phones

    asked by Betty
  101. Statistics

    An advisor offers 8 mutual funds in the high risk category, 7 moderate, 10 in low risk. The investor decides to invest in 3 high risk, 4 moderate risk, and 10 low risk. How many ways can he do this?

    asked by Betty
  102. physics

    1. When an ideal gas is expanded adiabatically in volume at constant pressure, the average kinetic energy of the gas molecule: A. Increase B. decreases C. Does no change i know the answer is B but can someone explain why please? i thought it does not

    asked by james
  103. physics

    8. Electric field lines arising from two small charged particles P and Q. Consider the following two statements: i.The charge on P is smaller than the charge on Q. ii.The electrostatic force on P is smaller than that on Q. Which of the above statements are

    asked by james
  104. math

    it takes 1 3/4 metres of cloth to make a uniform. a)how many similar uniforms can be use from 10 metres of cloth? b)how much cloth will be left?

    asked by iris
  105. World history

    Confucius believed that human beings are essentially A. gods. B. evil. C. good. D. sinful.

    asked by Bill
  106. Physics

    A child operating a radio-controlled model car on a dock accidentally steers it off the edge. The car's displacement 0.95 s after leaving the dock has a magnitude of 6.7 m. What is the car's speed at the instant it drives off the edge of the dock?

    asked by Andy
  107. Chemistry

    A 0.100 mol sample of H2S is placed in a 10.0 L reaction vessel and heated to 1132°C. At equilibrium, 0.0285 mol H2 is present. What is the value of Kc at this temp? 2 H2S(g) 2 H2(g) + S2(g After I do my calculations, I get Kc= (0.0057)2 X

    asked by Linda
  108. physics

    a ball roles off a horizontal table at 0.30 m/s and strikes the ground 0.15m horizontally from the base of the table. (a) how high is the table (b) if another ball roles off the same table at 0.60 m/s how far from the base of the table does it hit.

    asked by zeinab
  109. college chem

    Biphenyl, C12H10, is a nonvolatile, non ionizing solute that is soluble in benzene, C6H6. At 25 °C, the vapor pressure of pure benzene is 100.84 torr. What is the vapor pressure of a solution made from dissolving 14.3 g of biphenyl in 25.8 g of benzene?

    asked by Zachary
  110. physics

    a ball roles off a horizontal table at 0.30 m/s and strikes the ground 0.15m horizontally from the base of the table. (a) how high is the table (b) if another ball roles off the same table at 0.60 m/s how far from the base of the table does it hit.

    asked by zeinab
  111. Math

    Rearrange this equation to isolate c. a=b((1/c)-(1-d))

    asked by Zachary
  112. physics

    a projectile is fired horizontally at 13.4m/s from the edge of a 9.50m high cliff and strikes the ground. (a) what is the horizontal distance it traveled. (b)the elapsed time (c)the final velocity

    asked by zeinab
  113. Chemistry

    The rate of a reaction A ---> B is expressed by the rate expression rate=k(A)2. If the molar concentration of A is tripled, the rate of the reaction should increase by a factor of some many?

    asked by Marcus
  114. physics

    a gun can shell targets 15 km away. find (a)the min launch speed needed to achieve that range (b) the shells flight time under these conditions

    asked by zeinab
  115. math

    solve for x 75=13^x

    asked by Zachary
  116. chemistry

    calculate the number of g fes04 that will be oxidized by 24ml of a 250N Kmn04 in a solution acidified with sulfuric acid. The unbalanced equation for the reaction. The answer 0.912g Who helps

    asked by Fai
  117. science

    Calculate the fraction of atoms in a sample of argon gas at 365 K that has an energy of 11.0 kJ or greater.

    asked by Hannah
  118. biochem

    I'm stuck on this question, not sure where to start. can you show detail and explain so that it helps me to understand it. help please, thanks. The value of delta G for the conversion of 3-phosphoglycerate to 2-phosphoglycerate (2PG) is +4.4kj/mol. If the

    asked by frank
  119. physics

    a gazelle attempts to leap a 2.1m fence. assuming a 45 degree takeoff angle, whats the min speed for the jump

    asked by zeinab
  120. biology

    Please check my answers. I did my best. 1. Which process involves both passive and active transport? a.)facilitated diffusion

    asked by Angela
  121. physics

    a soccer player takes a penalty kick 11.0m from the goal. to score she has to shoot the ball under the 2.44m high crossbar. if she kicks at 19.8m/s, what range of launch angles will result in a goal?

    asked by zeinab
  122. physics

    A particle revolves in a horizontal circle of radius 3.20 m. At a particular instant, its acceleration is 1.20 m/s 2 in a direction that makes an angle of 55.0º to its direction of motion. Determine its speed (a) at this moment, and (b) 1.50 s later,

    asked by god
  123. pre-calc

    how do u find the asymptotes and intercepts of y=2^(x+1) +1 and graph plzzz thxaks uu

    asked by samb
  124. chemistry

    How many grams of kmn04 are contained in 35ml of 0.05N kmn04 used in the following reaction in basic solution. the answer 0.0922g who helps

    asked by Fai
  125. ap chemistry

    On a hot sunny day in August, the weather- man reports that the barometric pressure is 49 atm atmospheres. How many Pascals is this? Answer in units of Pascals

    asked by cheri
  126. ap chemistry

    Suppose that a sample of gas occupies 117 mL of volume at 25C and a pressure of 289 torr. What would be the volume if the pressure were changed to 490 torr at 25C? Answer in units of mL

    asked by cheri
  127. west chester university

    A ball is thrown vertically upward, which is the positive direction. A little later it returns to its point of release. The ball is in the air for a total time of 8.26 s. What is its initial velocity? Neglect air resistance.

    asked by kayla
  128. ap chemistry

    A 1.50 liter tank filled with helium at 125 atm is used to fill balloons. The pressure in each balloon is 950 torr and the volume of each balloon is 1.20 liters. How many balloons can be filled? Answer in units of balloons

    asked by cheri
  129. ap chemistry

    To what temperature must a sample of helium gas be cooled from 123C to reduce its volume from 3.7 L to 0.27 L at constant pressure? Answer in units of K

    asked by cheri
  130. ap chemistry

    A sample of gas occupies 4 mL at STP. At what pressure would this sample occupy 500 mL if the temperature is changed to 525C? Answer in units of torr

    asked by cheri
  131. biology help!!

    Please check my answers. I did my best. 1. Which process involves both passive and active transport? a.)facilitated diffusion

    asked by Angela
  132. algabra 2

    3/4(20a+12)+1/4(20a+12)

    asked by yon
  133. College Algebra

    Hello - I am stuck on this problem and I'm in serious need of some help. I don't understand this question at all. The problem is: Find the equilibrium quantity and equilibrium demand function for the given: Supply: P=45q Demand: P=q^2+10,000

    asked by Jessica
  134. ap chemistry

    What is the density of hydrogen sulfide (H2S) at 0.9 atm and 295 K? Answer in units of g/L

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  135. ap chemistry

    A 115 mg sample of eugenol, the compound responsible for the odor of cloves, was placed in an evacuated flask with a volume of 500 mL at 280C. After the eugenol completely evap- orated, the pressure that it exerted in the flask under those conditions was

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  136. ap chemistry

    Nitroglycerin is a shock-sensitive liquid that detonates by the reaction 4C3H5(NO3)3(`) −! 6N2(g) + 10H2O(g) + 12CO2(g) + O2(g) Calculate the total volume of product gases at 210 kPa and 296C from the detonation of 2.7 lb (1224.7 g) of nitroglycerin.

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  137. ap chemistry

    An oxygen sample has a volume of 5 L at 27C and 800 torr. How many oxygen molecules does it contain?

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  138. ap chemistry

    What pressure would a mixture of 3.2 grams of O2, 6.4 grams CH4, and 6.4 grams of SO2 exert if the gases were placed in a 5.1 liter container at 127C? Answer in units of atm

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  139. ap chemistry

    Jeff and Jill go canoeing. While reaching to feed a duck, the boat flips. Jeff and Jill blow up their inflatable life preservers and then put them on. As they wait for the rescue squad, they calculate how much nitrogen is in each life preserver. They

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  140. ap chemistry

    We mix 146 grams of oxygen gas with 117 grams of argon gas in a volume of 436 mL at 58C. What will be the final pressure of the gas mixture? Answer in units of atm

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  141. ap chemistry

    A 6.9 gram sample of a gaseous substance occupies 10 L at 63C and 537 torr. What is the density of the gas under these conditions? Answer in units of g/L

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  142. ap chemistry

    We observe that 5 grams of a gaseous com- pound occupies 1526 mL at 49C and 672 torr. What is the molecular weight of the com- pound? Answer in units of g/mol

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  143. human resources

    Hi, What is the most critical factor in setting up a goal based performance appraisal system? A. Choosing the most crical incidents on which to base goals B. Emphasizing short term over long term goals C. Giving emplyees some freedom in their choice

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  144. Economics

    Suppose the consumer has convex preferences, and we know (2, 4) ~(6, 1). Is the statement (4,2.5) >=(6, 1) correct? What about the statement (4, 2.5)> (6, 1)? Suppose now the consumer has strictly convex preferences, and and we know (2, 4) ~ (6,1). Does

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  145. ETSU

    How much work is done when a force of 800.0 N is exerted while pushing a crate across a level floor for a distance of 1.5 m

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  146. 12th science

    How will you prepare potassium per magnate.

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  147. Computer language.

    a program that prints all the numbers from 1 to 1000 that are divisible by 7. (in C++)

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  148. science

    A boy and his skateboard have a combined mass of 64 kg. If he is moving with a speed of 3.2 m/s, and collides with a stationary skateboarder whose mass (including his skateboard) is 96 kg, with what speed will the two skateboarders move immediately after

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  149. chemistry

    Suppose a compound Z had a partition coefficient of 8.0 in ether-water. If 10.0 g of Z was dissolved in 100 mL of water, and if the water solution was extracted with two 100 mL portions of ether, answer the following questions. show your calculation. a)

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  150. maths

    points A,B,C and D lie on a straight line in the given order. AC=25cm and BD=46cm. the ratio of length CD to length AB is 5/2. find the length of line segment BC in cm.

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  151. biology (cell bio)

    Can someone explain the Nernst Equation and its purpose, in as simple terms as possible? For some reason it's just not clicking with me. Thanks!

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  152. Chemistry

    On a 10.5 ounce bag of potato chips, the manufacturer states that the single serving is one ounce, which is equivalent to 150 calories. How many kilojoules are in this bag of potato chips? Is it 6.5898kJ?

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  153. physics

    8. Electric field lines arising from two small charged particles P and Q. Consider the following two statements: i.The charge on P is smaller than the charge on Q. ii.The electrostatic force on P is smaller than that on Q. Which of the above statements are

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  154. accounting

    Mikayla, chief financial officer of Napoli Chocolate Company, adopts religious ethical standards. These involve an element of

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  155. biology (confused)

    Hi Will someone please check my answers. I went to biology-forums(dot)com and registered but i really don't know how to post my questions and i really need help (with the questions). Thanks in advance. 1. Which process involves both passive and active

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  156. algebra

    five-sixths of a number is -60. What is the number?

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  157. ap chemistry

    An apparatus consists of a 2 L flask containing nitrogen gas at 25C and 819 kPa, joined by a valve to a 12 L flask containing argon gas at 25C and 51 kPa. The valve is opened and the gases mix. What is the partial pressure of nitrogen after mixing?

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  158. Math

    Solve the piece wise function when f(17) f(x) = f(x-3)+2 if x > 10 -5 if x

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  159. Europe

    Which of the following is the greatest concern for Eastern Europe? water pollution water availability desertification overpopulation

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  160. math

    Consider the supply equation where x is the quantity supplied in units of a thousand and p is the unit price in dollars. p=x^3+x+10 Determine the price at which the supplier will make 2,500 units of the commodity available in the market. (Give your answer

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  161. bio (homeostasis)check

    Please Check this for me. 1. Which process involves both passive and active transport? a.)facilitated diffusion

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  162. Algebra

    Write the expression in descending exponent form. -7y + 8y3 - y6 I think I have to combine like terms but I don't know how. Please help?

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  163. CHEMISTRY

    How to calculate the pH of 0.120 M of HClO2? plssss i need the answer asap.

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  164. nsu

    A microwave oven has a power requirement of 1256 W. A frozen dinner requires 4.0 min to heat on full power. (a) How much electrical energy (in kWh) is used?

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  165. bio(updated) Devron

    Please help me with these questions. I have taken out some of the questions that i was a 100% sure of. I just need you to check for me the ones i'm not too postive about. I would really appreaciate the help! Thank you in advance. 1. The phenomenon of

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  166. Physics

    A downward force of 5.1 N is exerted on a -7.3 mcirco C charge. What is the magnitude of the electric field at this point?

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