# Questions Asked onOctober 23, 2012

1. ## chemistry

Complete and balance the molecular equation, including phases, for the reaction of aqueous ammonium bromide, NH4Br, and aqueous lead(II) acetate, Pb(C2H3O2). Enter the balanced net ionic equation, including phases, for this reaction.

2. ## Physics

a small rock with mass 0.20 kg is released from rest at point A which is at the top edge of a large, hemispherical bowl with radius R = .5m. assume that the size of the rock is small compared to R, so that the rock can be treated as a particle, and assume

3. ## Math

From a boat on the lake, the angle of elevation to the top of a cliff is 26°35'. If the base of the cliff is 85 feet from the boat, how high is the cliff (to the nearest foot)? A. 56 feet B. 43 feet C. 53 feet D. 46 feet I HAVE BEEN WORKING ON THIS

A single conservative force = (6.0x - 12) N where x is in meters, acts on a particle moving along an x axis. The potential energy U associated with this force is assigned a value of 23 J at x = 0. (a) Write an expression for U as a function of x, with U in

5. ## math

A pair of dice is rolled once. suppose you lose \$9 if the dice sum to 9 and win \$11 if the dice sum to 4 or 6. how much should you win or lose if any other number turns up in order for the game to be fair?

2. Mrs. Whimsey’s class is having a pizza party. If there are 16 students and 4 pizzas cut into 8 slices, what answer choice represents the fraction of one pizza each student receives? a) 1/3 b)1/16 c)1/4 d)1/8 Please help :)

7. ## math

Harold says" to find 6x8 , i can use the facts for 5x4and 1x4." do you agree? explain.

8. ## Gen Chem

ignition of mgnh4po4*6h2o produces nh3, h2o and magnesium pyrophosphate, Mg2P2O7. complete and balance the equation for this reaction. If 5.00 g of MgNH4PO4*6H2O are ignited, how many grams of Mg2P2O7 would be formed? 2MgNH4PO4*6H2O(g)--->

9. ## CHEMISTRY

Calculate the change in entropy that occurs when 17.68 g of ice at -12.7°C is placed in 54.05 g of water at 100.0°C in a perfectly insulated vessel. Assume that the molar heat capacities for H2O(s) and H2O(l) are 37.5 J K-1 mol-1 and 75.3 J K-1 mol-1,

10. ## Physics

Determine the normal force for a laundry basket with a mass of 4.7 kg in each of the following situations (a) at rest on a horizontal surface _________ N (b) at rest on a ramp inclined at 12° above the horizontal _______ N (c) at rest on a ramp inclined

11. ## English

Why do you think Sir Gawain flinched when the Green Knight brought his ax down, but the Green Knight did not flinch when he was in the same position? The prompt is referring to the long poem "Sir Gawain and the Green Knight" I think Sir Gawain flinched

Ted Andrews bought 15 shares of Clark Company stock at \$14.875. He sold them a month later at \$20.375. What was his profit? Please help!! :) Thanks to everyone who helps! a)\$6.50 b)\$49.50 c)\$80.50 d)\$82.50

13. ## Calc

Air pressure at sea level is 30 inches of mercury. At an altitude of h feet above the, air pressure, P, in inches of mercury, is given by, P =30e^(-3.23x10-5h) a)Find th equation of the tangent line at h=0. b)A rule of thumb is given by travelers is that

14. ## Physics

A 7900- helicopter accelerates upward at 0.90 while lifting a 1100- frame at a construction site. A) What is the lift force exerted by the air on the helicopter rotors? B)What is the tension in the cable (ignore its mass) that connects the frame to the

15. ## Science

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

16. ## Chemistry

For the following reaction, 3.93 grams of carbon tetrachloride are mixed with excess methane (CH4). The reaction yields 4.10 grams of dichloromethane (CH2Cl2). methane (CH4) (g) + carbon tetrachloride (g) dichloromethane (CH2Cl2) (g) What is the

17. ## chem 111

the color change at the endpoint should persist for 30 seconds. explain why the time lapse is a good titration technique.

18. ## Physics

If a rod is moving at a velocity equal to 1/2 the speed of light parallel to its length, what will a stationary observer observe about its length? The length of the rod will become exactly half of its original value. The length of the rod remains the same.

19. ## Physics

A circular loop with 30 turns and area of 0.25 m2 rotates at 100 rad/s. The axis of rotation of the loop is perpendicular to the direction of the magnetic field of 0.04 Tesla. What is the maximum emf induced in the loop? 15 V 30 V 45 V 60 V I got 15 V but

20. ## math

Compute the number of vinyl tiles, measuring 10 in. each side, needed to tile a kitchen measuring 20ft. by 16ft. _____tiles

21. ## Precalculus

If p(x) is a cubic polynomial such that p(0) = 0, P(2) = -4 and P(x) is positive only when x > 4 find p(x).

22. ## math

ron is tiling a countertop. he needs to place 54 square tiles in each of 8 rows to cover the counter. he,wants to randomly place 8 groups of four blue tiles each and have the rest of the tiles to be white. how many white tiles will ron.need?choices

23. ## calculus

Two cars start from the same point at the same time. One travels north at 25 mph, and the other travels east at 60 mph. How fast is the distance between them increasing at the end of 1 hr? Find D after 1 Hr, solve D^2=25^2+ 60^2

24. ## physics

A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball is released from rest (see the drawing). It swings downward and strikes a block initially at rest on a horizontal frictionless

25. ## chemistry...

knowing that one mole of KHP, C8H5O4K, reacts with one mole of NaOH, what mass of KHP is required to neutralized 30.0mL of the 0.10 M NaOH solution?

26. ## English

In "The Canterbury Tales" Chaucer uses the pilgrimage primarily as a device to ___________. A.emphasize the characters' religious aspirations B.frame the stories told by individual characters C.describe the rigors of medieval life D.create a vivid and

27. ## economics

What does the curved line represent in the graph?

28. ## chemistry

how many milliliters of 0.250 M KMnO4 are needed to react with 3.55 grams of iron(II)sulfate, FeSO4? the reaction is as follows: 10FeSO4(aq)+2KMnO4(aq)+8H2SO4(aq)¨ 5Fe2(SO4)3(aq)+2MnSO4(aq)+K2SO4(aq)+8H2O(l)

29. ## Physics

The wavelength of the electromagnetic waves is 200 nm. Which of following regions does it belong to? visible light region ultra violet region infrared region x ray region Wouldn't it fall into the UV Region? Just wanna confirm

30. ## finite mathematics

Find the present value of the ordinary annuity. Please round the answer to the nearest cent.\$2,000 per semiannual period for 7 yr at 12%/year compounded semiannually

31. ## chemistry

What mass of sodium bicarbonate reacts with 225 mL of 6.00 M HCl?

32. ## Social studies

I am learning about scarcity in my SS 6th grade and I am unsure about this question. Which sentence best tells the effect of scarcity on economics? A. Scarcity shapes decisions about how to distribute goods B. because resources are scarce consumers buy

33. ## Calculus

A woman 5 ft tall walks at the rate of 5.5 ft/sec away from a streetlight that is 16 ft above the ground. At what rate is the tip of her shadow moving?

34. ## Chemistry

Which of the following substances are likely to be soluble in water? A)ZnS b)Au2(CO3)3 C )PbCL2 d) MnO2

35. ## chemistry

A 3.75-G SAMPLE OF IRON ORE IS TRANSFORMED TO A SOLUTION OF IRON(II)SULFATE, FeSO4,AND THIS SOLUTION IS TITRATED WITH 0.150 M K2Cr2O7. IF IT REQUIRES 43.7 mL OF POTASSIUM DICHROMATE SOLUTION TO TITRATE THE IRON(II)SULFATE SOLUTION, WHAT IS THE PERCENTAGE

36. ## Managerial Econ

You are the manager of a monopoly, and your demand and cost functions are given by P = 300 – 2.5Q and C(Q)=1000 + 2.5Q2. a.At what price and quantity are firm’s profits maximized?

10. From the 2010 census data, the population of Texas was about 2.5 x 107 people. Florida’s population was about 1.9 x 107. Idaho’s population was about 1.6 x 106. Which of the following statements is true? a)Idaho has a larger population than

38. ## chemistry

If 0.500 mol NaN3 react, what mass in grams of nitrogen would result?

39. ## Algebra 2 Helpp :(

QUESTIONS (vvv) (1) Solve the system by subsitution 2x + y = -11 3 - 4y = 11 (2) Solve the system by elimination 2x + 6 = -12 5x - 5y = 10 (3) What is the solution of the following system? -3x - 2y = -12 9x + 6y = -9 (4) What is the solution of the

40. ## Math!!

If there is 1/6 of a cake and Mitchell only wants 3/12 of it, how much of the cake does he want? Please help!! a)1/6 b)4/18 c)1/24 d)3/18

41. ## Physics helppp

Which of the following statements are TRUE? Select all that apply. An isolated system is one in which objects inside the system are not influenced by any forces from outside the system. The mechanical energy of a pendulum bob is maximized at the bottom of

42. ## Chemistry

Microwave ovens emit microwave energy with a wavelength of 12.5 cm. What is the energy of exactly one photon of this microwave radiation?

43. ## PHYSICS H

suppose an elephant and a feather fall from a skyscraper. in the presence of air resistance, the elephant would fall faster because...list all that apply. a) acceleration of gravity is greatest for the elephant b) elephant experiences a smaller air resis.

44. ## math

sally has a bag with red,blue, and green marbles. She has twice as many blue marbles as red marbles. She has 5 times as many green marbles as red marbles. Altogether she has 24 marbles. How many of each color marble does she have? Explain how you found

45. ## Physics

Two groups of canoeists meet in the middle of a lake. After a brief visit, a person in canoe 1 pushes on canoe 2 to separate the canoes. Suppose the speeds of the two canoes after they are pushed apart are 0.65 m/s for canoe 1 and 0.47 m/s for canoe 2. If

46. ## Math

One third of the students in mrs. hayko's class walk to school. Of the students who do not walk, four-fifths take the bus. a) what fraction of the students in Mrs. Hayko's class take the bus to school? b) How many students might there be in her class?

47. ## Physics

When the pendulum bob reaches the mean position, the net force acting on it is zero. Why then does it swing past the mean position?

48. ## physics

A box slides down a plane 8 m long that is inclined at an angle of 30 degrees with the horizontal. If the box starts from rest and u = 0.25, find a.) the acceleration of the box, b.) it's velocity at the bottom of the plane, and c.) the time required for

49. ## physics

2. When a 625g mass is attached to a vertical spring, the spring stretches by 16cm. How much mass must be attached to the spring to result in a .78s period of oscillation?

50. ## Physics

The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.025 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.060 kg and is initially at rest. The

51. ## Information Technology

Develop an algorithm, flow chart and pseudocode that accept as input three unit test scores and a project score for seven students. The algorithm, flow chart and pseudocode should accept seven examination scores. The students's overall score comprised of

52. ## Math

A cattle train left Miami and traveled toward New York. 14 hours later a diesel train left traveling at 45km/h in and effort to catch up to the cattle train. After traveling for four hours the diesel train finally caught up. What was the cattle train's

53. ## Physics

2 people, each with a mass of 70 kg, are wearing inline skates and are holding opposite ends of a 15 m rope. One person pulls forward on the rope by moving hand over hand and gradually reeling in more of the rope. In doing so, he exerts a force of 35 N

54. ## Algebra 1

Two fewer than a number doubled is the same as the number decreased by 38. Find the number. If n is "the number," which equation could be used to solve for the number?

55. ## chemistry

Which of the following solutions will not form a precipitate when added to 0.10M NaOH? a) 0.10 M MgBr2 b) 0.10 M NH4Br c) 0.10 M FeCL2

56. ## Physics

Find the energy stored in the solid flywheel of mass 8.0×104 and radius 1.8 when it's rotating at 290

57. ## Precalculus

(cosxcotx/secx+tanx)+(sinx/secx-tanx)

58. ## physics

A 83-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.76 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s,

59. ## English

1. What do you do? - I am a student. 2. What does your father do? - He is an architect. 3. What does your mother do? - She is an accountant. 4. What do you want to be in the future? - I want to be a pharmacist. 5. Why do you want to be a pharmacist? - I

60. ## Physics

A car with its brakes locked will remain stationary on an inclined plane of dry concrete when the plane is at an angle of less than 45 degrees with the horizontal. What is the coefficients of static friction of rubber tires on dry concrete

61. ## physics

What happens to the atomic number of the daughter nucleus if it is formed after the emission of the beta particle? The atomic number remains the same. The atomic number increases by two. The atomic number increases by one. The atomic number decreases by

62. ## physics

A supersonic jet flying at 137 m/s is accelerated uniformly at the rate of 23.1 m/s2 for 20.0 s. (a) What is its final velocity? (b) The speed of sound in air is 331 m/s. How many times the speed of sound is the plane's final speed?

63. ## math 2

pedro gets 8 hours of sleep each night. how many hours does pedro sleep in a yeat with 365 days? please solve the problem?

64. ## Physics

How much work did the movers do horizontally pushing a 160-kg crate 10.3m across a rough floor without acceleration, if the coefficient of friction was 0.50?

65. ## algebra

Of 480 consumers polled, some purchase ice cream, some purchase frozen yogurt, and some purchase both. If 260 people polled purchase ice cream and 200 purchase both ice cream and frozen yogurt, how many people purchase frozen yogurt?

66. ## Physics

a driver sees a horse on the road and applies the brakes so hard that they lock and the car skids to a stop in 24 m. the road is level and the coefficient of kinetic friction between the tires and the road is 0.7. How fast was the car going when the brakes

67. ## Government

candidates for president are not usually drawn to the office because of salary. why do you think these people run for the office?

68. ## Physics

A metallic surface emits electrons when it is irradiated with a yellow light source of power 25 Watts. What happens to the emission of the electrons if one yellow light source is replaced by two violet light sources of same power? The number of emission of

69. ## Calculus

An open topped cylinder has a volume of 125 cubic inches. Express the surface area of the cylinder as a function of its radius.

70. ## Chemistry

Which of the following best describes the difference between a mixture and a pure substance? A. A mixture is made up of more than one type of atom; a pure substance is made up of only one type of atom. B. A mixture has the same properties throughout; a

71. ## Chemistry

The Cu2+ ions in this experiment are produced by the reaction of 1.0g of copper. Information already found out .016 mol Cu2+ produced Overall reaction is Cu2+(aq)+Cl-(aq)+Cu(s)=2 CuCl(s) Maximum mass of CuCl that can be prepared from the reaction sequence

72. ## physics

An engineer must design a runway to accommodate airplanes that must reach a ground velocity of 60 m/s before they can take off. These planes are capable of being accelerated uniformly at the rate of 2.1 m/s2. (a) How long will it take the planes to reach

73. ## Physics

Astronomers can calculate the mass of a planet by using the orbital parameters of one of its moons. Consider a hypothetical planet, which has a hypothetical moon that orbits the planet in a roughly circular orbit with a radius of 3.95*10^8 m. The moon

74. ## chemistry

Which of the following solutions will not form a precipitate when added to 0.10M NaOH? a)0.10 M MgBr2 b) 0.10 M NH4Br c) 0.10 M FeCL2

75. ## math

find the interest rate to the nearest hundredth of a percent that will produce \$2500, if \$2000 is left at interest compounded semiannually for 4.5 year

76. ## Physics

An Earth satellite moves in a circular orbit at a speed of 5800 m/s. a)What is the radius of the satellite's orbit? b) What is the period of the satellites orbit in hours?

77. ## Physics

A 3.6 diameter merry-go-round is rotating freely with an angular velocity of 0.73 . Its total moment of inertia is 1600 . Four people standing on the ground, each of mass 60 , suddenly step onto the edge of the merry-go-round.What is the angular velocity

78. ## physics

Block 1, of mass1 = 0.550kg , is connected over an ideal (massless and frictionless) pulley to block 2, of mass2 , as shown. For an angle of = 30.0 and a coefficient of kinetic friction between block 2 and the plane of = 0.300mu(kinetic friction), an

79. ## physics

A ferry is crossing a river. The ferry is headed due north with a speed of 1.1 m/s relative to the water and the river’s velocity is 4.2 m/s to the east.Find the direction in which the ferry is moving (measured from due east, with coun- terclockwise

80. ## Physics

A dentist causes the bit of a high-speed drill to accelerate from an angular speed of 1.20x10^4 rad/s to an angular speed of 3.14x10^4 rad/s. In the process, the bit turns through 1.92x10^4 rad. Assuming a constant angular acceleration, how long would it

81. ## Physics

The following four lenses are placed together in close contact. Find the focal length of the combination. Lens 1- F'= +200mm Lens 2- F'= -125mm Lens 3- F'= -400mm Lens 4- F'= +142.9mm

82. ## physics

For a given velocity of projection in a projectile motion, the maximum horizontal distance is possible only at ө = 45°. Substantiate your answer with mathematical support. 20.5 m/s

83. ## art need help

1. This is the study of beauty and art. (1 point)ethics harmony unity aesthetics 2. This view refers to how realistic the subject is in a work of art. (1 point)object view critical view subject view photographic view 3. This view refers to how clearly an

84. ## Chemistry

Assuming that the gases are ideal, calculate the amount of work done (in joules) in the following reaction. Is work done on or by the system? A reaction in the Mond process for purfying nickel(0) tetracarbonyl at 50-100 degrees Celsius. Assume one mole of

85. ## physics

Engineers are developing new types of guns that might someday be used to launch satellites as if they were bullets. One such gun can give a small object a velocity of 2.9 km/s, moving it through only 1.6 cm. (a) What acceleration does the gun give this

86. ## Physics

In an experiment conducted using the Young's double-slit apparatus, the separation between the slits is 20 µm. A first-order constructive interference fringe appears at an angle of 2.5o from the zeroth order (central) fringe. A. What wavelength of light

87. ## Physics

A 5.57-kg object passes through the origin at time t = 0 such that its x component of velocity is 5.25 m/s and its y component of velocity is -3.15 m/s. (a) What is the kinetic energy of the object at this time? (b) At a later time t = 2.00 s, the particle

88. ## Science

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

89. ## Abnormal Psychology

Though similar in their concerns about eating and gaining weight, individuals with bulimia differ from individuals with anorexia in that they _______, while those with anorexia don’t/aren’t. A. binge and purge B. are within 10% of their normal weight

90. ## algebra

A cookie company uses one cup of sugar for every cookies it makes. Let represent the total number of cups of sugar used, and let represent the number of cookies made. Write an equation relating to , and then graph your equation using the axes below.

91. ## Precalculus

Rewrite 2sinx/(cotx+cscx) as an expression that doesn't involve a fraction.

92. ## pltw

How do you envision applying your sketching skills in college?

93. ## Physics

A 7900- helicopter accelerates upward at 0.90 while lifting a 1100- frame at a construction site. A) What is the lift force exerted by the air on the helicopter rotors? B)What is the tension in the cable (ignore its mass) that connects the frame to the

94. ## Algebra 1

EAch set of ordered pairs represents a function. Write a rule that represents the function (2,10),(4,20),(5,25),(7,35),(9,45)

95. ## Abnormal Psychology

For some teens, particularly girls, excessive efforts to control eating may be a misguided effort to A. punish parents. B. manage the stress and physical changes that confront them as they pass into adolescence. C. punish themselves. D. regress back to the

96. ## calculus

A man starts walking north at 4ft/s from a point P. Five minutes later a woman starts walking south at 5ft/s from a point 500 ft due east of P. At what rate are the people moving apart 15 min after the woman starts walking? I'm confused about the diagram

97. ## CHEMISTRY

At what temp do hydrogen molecules, H2, have the same rms speed as nitrogen molecules, N2, at 455 C? At what temperature do hydrogen molecules have the same average kinetic energy?

98. ## Science Fair

Hi, my question is are part 1,2, and 3 different ways you can do the project? There are three parts. Each part should take less than 1 hour. In Part 1, you will stare at a colored object for various amounts of time, then measure how long it takes for the

99. ## Abnormal Psychology

Sleep deprivation impairs functioning of the A. endocrine system. C. occipital lobe. B. prefrontal cortex. D. left temporal lobe. I put D

100. ## Physics

The third harmonic of a guitar string has a frequency of 170 Hz. What is the length of the guitar string if the speed of the waves on the string is 125 m/s? 1.103 m 2.206 m 0.368 m 2.040 m

101. ## English

from Sir Gawain and the Green Knight Why didn’t the Green Knight want to duel? A.He was a peaceful knight. B.He would easily win. C.He did not bring a weapon. D.He never fought at Christmas. I think the answer is either A or B. Thanks for the help.

102. ## Chemistry

A sample of the compound prepared in this experiment, weighing .1021g, is dissolved in HNO3 and diluted to a volume of 100mL. A 10mL aliquot of that solution is mixed with 10mL 6 M NH3. The [Cu(NH3)4 2+] in the resulting solution is 5.16x10^-3 M. How many

103. ## 2 English questions

What is the old woman’s perspective on poverty as shown in these lines? Poverty is, though wanting an estate, / A kind of wealth that none calumniate. / Poverty, often, when the heart is lowly, / Brings one to God and teaches what is holy, / Gives

104. ## Science

Choose an ecosystem to research with regard to abiotic factors and how organisms in that particular ecosystem depend on those abiotic factors. Write a paragraph that describes the ecosystem that you selected and how organisms compete for abiotic factors

105. ## Chemistry

At what temp do hydrogen molecules, H2, have the same rms speed as nitrogen molecules, N2, at 455 C? At what temperature do hydrogen molecules have the same average kinetic energy?

106. ## physics

You are explaining to a friend why the crew of the International Space Station feels weightless while orbiting the Earth. Your friend responds that he thought gravity was just a lot weaker up there. Show that it isn’t so by calculating the acceleration

107. ## Organic Chemistry

what is the major product of a reaction with 1-butene and Br2 in water?

108. ## Science

How many calories of heat are required to change 1 gram of ice at 0°C to liquid water at 0°C?

109. ## Physics

What is the wavelength of visible light of 6 x 1014 Hz frequency? 500 nm 400 nm 4000 nm 4 nm

110. ## math

Two fraternities, Sig Ep and Ep Sig, plan to raise money jointly to benefit homeless people on Long Island. They will sell Yoda vs. Alien T-shirts in the student center, but are not sure how much to charge. Sig Ep treasurer Augustus recalls that they once

111. ## Chem

What mass of lithium (in g) is required to react completely with 58.3 mL of N2 gas at STP?

112. ## math

how could you use 5x6=30 to find the product of 6x6

113. ## I.E.D

How do you envision applying your sketching skills in other classes?

114. ## Math

On a scale 1¾ inches represents 50 miles. How many miles are represented by 7 inches?

115. ## Precalculus

Rewrite cotx/(1+sinx) as an expression that does not involve a fraction.

116. ## Physics

A cannonball is fired with a velocity of 200 m/s at an angle of 25 degrees above the ground. After the total flight of 45.6 seconds, the cannonball returns to the ground. Calculate: the initial horizontal and vertical components of the velocity, the

117. ## college chemistry

A sample of helium occupies 1521 mL at 719 mmHg. Assume that the temperature is held constant and determine a) the volume of the helium at mmHg. b)the pressure, in mmHg, if the volume is changed to 315mL

118. ## Physics

A photocell shows photoelectric effect when green light shines on it. Which of the following is correct if a green light is replaced by a blue light? Electron emission would get stopped. Electrons are emitted with more velocity. Electrons are emitted with

119. ## physics college

A lamp has a mass of 10kg and is supported by two wires that make an angle of 35 degrees between them. Find the tension in each wire?

120. ## Physics

A descent vehicle landing on the moon has a vertical velocity toward the surface of the moon of 38.8 m/s. At the same time, it has a horizontal velocity of 54.3 m/s.At what speed does the vehicle move along its descent path

121. ## chemistry

For a particular isomer of C8H18, the following reaction produces 5108.7 kJ of heat per mole of C8H18(g) consumed, under standard conditions.

122. ## physics

An archer shoots an arrow horizontally at a target 13m away. The arrow is aimed directly at the center of the target, but it hits 57cm lower. What is the initial velocity?

123. ## Math

The first- floor apartments in Jenna's building are numbered 100 to 110. How many apartments on that floor are a prime number? What are those apartment numbers?

124. ## Physics

The asteroid belt circles the sun between the orbits of Mars and Jupiter. One asteroid has a period of 10 Earth years. a) What is the asteroid's orbital radius? b)What is the asteroid's orbital speed?

125. ## CHEMISTRY: URGENT

24cm^3 of a mixture of methane and ethane were exploded with 90cm^3 of oxygen. After cooling to RTP the volume of gases was noted and it decreased by 32cm^3 when treated with KOH. Calculate the composition of the mixture.

126. ## physics

A source of light and a screen lie in the same plane, 3 metres in front of a plane mirror, the mirror surface being parallel with the screen. If the mirror is rotated through 10degrees, how far will the patch of light mves across the screen?

127. ## Calculus

find the points on the curve x^2+xy+y^2=7 (a) where the tangent is parallel to the x-axis and (b) where the tangent is parallel to the y-axis. In the latter case, dy⁄dx is not defined, but dx⁄dy is. What value does dx⁄dy have at these points?

128. ## math

Mrs. Daniels pays \$324 for a handbag and 3 pairs of shoes. The handbag costs half as much as the 3 pairs of shoes combined. find the cost of the handbag

129. ## english, possessive nouns

Directions: Wrie each sentence. Change the underlined phrase to show possession. The honesty of children is refreshing. The honesty of children is the underline part of the phrase.

130. ## math

how to explain 0.26 and 0.260 are same

131. ## physics

A camel sets out to cross the desert, which is 49.8 km wide in the north-south direction. The camel walks at the uniform speed 2.64 km/hr along a straight line in the direction 50.1 north of East (only the camel knows why he chose that particular

132. ## Physics

1. A rescue plane flying horizontally at an altitude of 500 m and velocity of 300 m\s east drops a food supply packet to plane crash survivors on the ground. The packet falls freely to the ground without a parachute. Assume that the weather is perfect. a.

133. ## Abnormal Psychology

Which of the following effects is least likely to occur when an individual is malnourished? A. A loss of circadian rhythm B. A decrease in the release of growth hormone C. Dermatological changes D. Lethargy, apathy, and depression C was my answer

134. ## Physics

A conductor of length 2m carrying a 1.5A current experiences a force of 2.2 N. What is the magnitude of the magnetic field that acts perpendicular to the flow of current in the conductor? 0.73 Tesla 6.60 Tesla 0.34 Tesla 0.61 Tesla

135. ## Math

Earth has a new surface of 1.97x10^8 square miles. A new planet has a surface area 13 times the surface area of Earth. What is the surface area of the new planet? Do I multiply 1.97x13 or do I multiply 13x10^8? that's what i'm confused about.

136. ## Math

40-3n=-23 what is n? 2/3-6h=-13/6 what is h? write as a equation,then solve. the quotient of a number and 2, minus 9, is 14 a number decreased by 7 and then divided by 5 is 13 the sum of 15 and 7 times a number is 99

137. ## Precalc

Rewrite cot(^2)xcosx/(cscx-1) as an expression that doesn't involve a fraction.

138. ## math

describe the interval you would use for a bar graph if the data rangers from 12 to 39 units.

139. ## math

what is the fact family for 31?

140. ## Math

Andy has 6 dimes and 10 nickels in his pocket. If he draws two coins without replacing the first coin, what is the probability of drawing a nickel and then a dime? A ¼ B 15/64 C 1/60 D 3/5

141. ## physics

When a parachute opens, the air exerts a large drag force on it. This upward force is initially greater than the weight of the sky diver and, thus, slows him down. Suppose the weight of the sky diver is 950 N and the drag force has a magnitude of 1100 N.

142. ## CHEMISTRY

24cm^3 of a mixture of methane and ethane were exploded with 90cm^3 of oxygen. After cooling to RTP the volume of gases was noted and it decreased by 32cm^3 when treated with KOH. Calculate the composition of the mixture.

143. ## Physics

A skier stands on a 5 degree slope . if the coefficient of static friction is 0.1, does the skier start to slide?

144. ## Physics

The wheel is attached to an electric generator and the rotation rate drops from 290 to 230 in 3.5 . What is the average power output?

145. ## Intermediate algebra

If a ball is thrown vertically upward from the ground, with an initial velocity of 64 ft/s, it's height h after t seconds is given by h=-16t^2+64t how long does it take the ball to return to the ground?

146. ## AP PHYSICS

A 25-g bullet is fired with a velocity of 200m/s. If the gun from which the bullet is fired has a mass of 3.5kg,what is the recoil velocity? PLEASE HELP ME.

147. ## Math

Suppose that a car rental agency gave you the following choices. Option A \$30 per day plus 40¢ per mile Option B flat \$50 per day (a) Write equations for cost per day c for options A and B. (Use m for distance in miles.) c = \$ (option A) c = \$ (option B)

148. ## math

find the perimeter of a triangle whose vertices are the followinf specified points in the plane? (9,-1)(-9,7)and(4,3)

149. ## physics

A 50.0 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with a speed of 27.0 m/s. If the player was moving upward with a speed of 2.80 m/s just before impact. (a) What will be the speed of the ball

150. ## chemistry

WHAT IS THE VOLUME IN MILLILITERS OF 0.100 SULFURIC ACID CONTAINING 0.949 GRAMS H2SO4

151. ## Modern world studies

Write a short paragraph that traces the rise of japan from an isolated society to major industrial and imperial power.

can someone please check this for me. Be sure to round to the nearest hundred. 1) 6 eggs in 7 days 2) 8 batteries in 3 months 3) 122 patients in 4 weeks 4) \$8.43 for 3 pounds

153. ## Math

What part of the school population likes basketball,baseball,or football? How much larger is this then the part of the student population that prefers soccer? Football 3/12 Basketball 4/12 Soccer 3/12 Baseball 2/2 Answer:1/2? Simplify the fraction if

154. ## trig

Use an addition or subtraction formula to simplify the expression: tan(2−u)=cot(f(u)).

155. ## AP Chem

(MnO40- + (C2O4)2- + H+ = CO2 + H2O + ? OR (MnO4)- + (C2O4)2-+ OH-=CO2 n+ H2O +? Can somebody please help me predict the products? I can balance it i just need help determining what to balance.

156. ## economics

What gives the U.S. government the right to collect taxes?

157. ## stats

For a normal population with µ = 100 and σ = 20: 1. What is the probability of a particular score being greater than 110? 2. What is the probability of a particular score being less than 50?

158. ## Finance

Heinz Corporation bonds carry a coupon of 8% and will mature in 5 years at \$1,000. Newly issued 5-year bonds with similar characteristics are yielding 4%. Calculate today's market price of the Heinz bond. Compute your answer, submit all your work, then

159. ## CHEMISTRY

A FALSK CONTAINS 49.8 mL OF 0.150 CALCIUM HYDROXIDE. HOW MANY MILLILITERS OF 0.500 SODIUM CARBONATE ARE REQUIRED TO REACT COMPLETELY WITH THE CALCIUM HYDROXIDE IN THE FOLLOWING REACTION? Na2CO3(aq)+ Ca(OH)2(aq)¨CaCO3(s)+2NaOH(aq)

160. ## Physics

If you know the frequency of any form of electromagnetic radiation, you can determine its wavelength as for all electromagnetic radiation: Frequency is directly proportional to speed. Frequency is inversely proportional to wavelength. Wavelength is

161. ## Chemistry

Can someone please explain this problem to me step by step pleaseeeeeee? In the following acid—base neutralization reaction HNO3 (aq)+ KOH (aq)---KNO3(aq) + H2O(I) What is the molarity (M) of an HNO3 solution if 50.0ml is needed to react with 25.0ml of

162. ## physics

a ball of mass of 4kg,of density 4000kg/m3 is completely immersed in water of density 1000kg/m3.find the force of buoyancy.[g=10m/s2]

163. ## pltw

What is a technical sketch? What is an artistic sketch? How are the two similar and how are they different?

164. ## Math

To convert a temperature in degrees Celsius to degrees Fahrenheit multiply the Celsius temperature by 9/5 and then add 32 F Is a temperature in degrees Celsius proportional to its equivalent temperature in degrees Fahrenheit.

165. ## Managerial Econ

You are the manager of a firm which produces according to the cost function C(Q) = 75+5Q2. Determine the profit maximizing output and price and the level of profits

166. ## Abnormal Psychology

Arousal parasomnias are typically not characterized by A. difficulty being aroused. B. mental confusion and disorientation when awakened. C. extreme reactivity to external stimuli. D. retrograde amnesia. B?

167. ## Biology

WHERE IN AN ANIMAL CELL IS WATER STORED?

168. ## Math

A Russian mathematician named Christian Goldbach came up with a theory that every even number greater than 4 can be written as the sum of odd primes. Test Goldbachs theory with the numbers 6 and 50.

169. ## english 9 1

what would i put in this to clarify it to be a pronoun? Director Ted Kline's new movie, which didn't feature any stars, was finally released last May. This was a surprise.

170. ## physics to be conceptualize

Which of the following statements are FALSE? Select all that apply. In an isolated system where only conservative forces cause energy changes, the kinetic energy and potential energy of the system can change, but the mechanical energy of the system cannot

171. ## chemistry

.0900g of unknown acid(diproctic acid) with empirical formular(CHO2) is dissolved in 30.0ml of water and the rest is titrated to the endpoint with 50.0ml of .040 M NaOH(aq) determine the molecular formula of the acid?

172. ## Math

A fire hose has a circular cross-section which has a diameter of 20 cm. The hose is full of water and the water in the hose is flowing at a speed of 5m/s. How many liters of water can flow from the hose in 1 minute? (1m^3 = 1000 L)

173. ## physics

A car is moving down a street at 51 km/h. A child suddenly runs into the street. If it takes the driver 0.62 s to react and apply the brakes, how many meters will the car have moved before it begins to slow down?

174. ## math

Samuel solved the equation h – 234 = 1,192 and found the solution to be h = 958. Is he correct? He is right I think because when you subtract 234 from 1192 it equals 958 right?

175. ## Precalc

rewrite sinxtanx/(cosx+1) as an expression that doesn't involve a fraction.

176. ## Math

Need Help!! Find the measure of the small angle between the hands of a clock at 8:16 a.m. I keep getting different answers

177. ## Physics

A piece of copper with mass 2.5kg is heated from 30degree celcius to 80degree celcius. 50000 Joule of thermal energy is needed.What is the heat capacity of the piece of copper? What is the specific heat capacity of the piece of copper?

178. ## Programming Logic

Shemrock Inc. is a brake pad manufacturing company. This company uses raw materials, such as carbon powder, iron, ash, and resin. It wants to develop an inventory management system that will have the following features: 1.The system should store the

179. ## physics

When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 68.5-kg man just before contact with the ground has a speed of 5.59 m/s. (a)

180. ## physics

If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h?

181. ## Precalculus

Show that the equation x^3+ x^2-3=0 has no rational roots, but that it does have an irrational root between x=1 and x=2

182. ## math

what is the smallest number which must be subtracted from 208 to leave a number which is exactly divisible by7?

183. ## chemistry

List the balanced net ionic equations for all reactions that you observed in this experiment. Use your observations to provide evidence for all successful reactions completed and products formed. Where applicable, list ions in their coordination complex

184. ## physical science

How much heat is absorbed by a persons hand if 100 grams of liquid water at 100°C is poured on his hand? (Assume the final temperature of the water will be normal body temperature of 37°C)

185. ## I.E.D

What is a technical sketch? What is an artistic sketch? How are the two similar and how are they different?

186. ## Precalculus

An open box is to be formed from a square sheet of carboard (square is 10x10 cm) by cutting squares and then folding up the sides. (the squares cut off are just the corners as they are labeles as an x by x). A) Find a function for the volume of the box.

187. ## accounting

imagine a business and its 50 transactions.. journalize it and also record it in subsidary books, post into ledger and prepare a trial balance... plzz help me...

188. ## math

Write the equation of the quadratic function with roots -2 and 4 and a vertex at (1, 9).

189. ## Physics

Contrast the metric units of distance, time, and speed. Describe the relationship between them.

190. ## Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

191. ## physics

A car with a velocity of 19 m/s is accelerated uniformly at the rate of 1.8 m/s2 for 6.8 s. What is its final velocity?

192. ## math

3 out of 5 students own a pet. 6 out of 11 students own a pet. are the results proportional? explain reasoning

193. ## Math

To convert a temperature in degrees Celsius to degrees Fahrenheit multiply the Celsius temperature by 9/5 and then add 32 F Is a temperature in degrees Celsius proportional to its equivalent temperature in degrees Fahrenheit.

194. ## Physics

What is the frequency of X-rays of 10 nm wavelength? 6 x 10^16 Hz 3 x 10^16 Hz 3.00 Hz 6 x 10^8 Hz

195. ## Biology

WHAT ORGANELLE WILL BE USED DURING CELLULAR REPRODUCTION TO HELP ANCHOR THE SPINDLE FIBERS?

196. ## math

The distance between two numbers on a number line is 6 units. One number is 5. What are the possibilities for the other numbers. A. -1 and 11 B. 0 and 5 C. 0 and 10 D. 5 and 11 Is the answer d

197. ## Chemistry

I did a simple distillation and a fractional distillation to purify acetone. How do I determine the concentration of acetone? (Instructions say this is not a simple M=mol/L calculation). My guess was to divide the volume of purified acetone by the volume

198. ## physics

If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h?

199. ## Physiology and Health

You have been given the task of making a presentation to a group of junior high school students arguing against making marijuana legal. What are four risks associated with its use that you could include in your talk?

200. ## physics

A car with a velocity of 19 m/s is accelerated uniformly at the rate of 1.8 m/s2 for 6.8 s. What is its final velocity?

201. ## Physics

What acceleration will you give to a 24.9 kg box if you push it horizontally with a net force of 82.8 N? __________ m/s2

202. ## stats

A normal distribution has a mean of µ = 28 with σ = 5. What is the minimum raw score needed to be in the top 25% of the distribution?

203. ## stats

Given a normal distribution with µ = 80, σ= 5, and given a sample size of n = 25, describe the following characteristics of the sampling distribution: 1. Central tendency 2. Variability

204. ## physics

state the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS 6. +0.50 DS c. +1.75 DS

205. ## Science - Chemistry!!!

A lead bullet with a mass of 8.50 g traveling at 4.80 x 102 m/s strikes a 2.00 kg block of wood and is embedded in it. Both the bullet and the block are initially at 25.0°C. Assume that no heat is lost to the surroundings and that all the kinetic energy

206. ## Physics

A 521 N box is sitting on a 33.5° incline. Find the force of gravity parallel (Fp) to the surface of the incline, and the force of gravity perpendicular to the surface of the incline (FN). a. If the coefficient of static friction is 0.227, find the Ff .

207. ## Chemistry

If you spilled a container of iron filings on the ground, how would you separate the iron fillings from the soil using their individual physical properties?

Please somebody do you know any websites that have virtual place value blocks for making decimals. Please make suer i can acctually make the decimal on the websites. Lastly make sure it s a websites that i can stay on for as longt as i want without the

209. ## science

the ski lift chair at a ski report is 2560m long. on average, the ski lift rises 15.2 degree above the horizontal. how high is the top of the ski lift relative to the base?

210. ## Science

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

211. ## stats

A researcher hypothesizes that a new herbal supplement improves memory. A sample of n = 25 college students is obtained and each student takes the supplement daily for six weeks. At the end of the 6-week period, each student is given a standardized memory

212. ## Math

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 5 times. Is that

213. ## Physics

Two ice fisherman stand face to face on the ice. They put their hands together, and push away from each other. The first man, who has a mass of 75 kg, accelerates backwards at 3.1 m/s What is the acceleration of the other man, who weigh 637N?

214. ## social stody

what parts of canada are good for growing crops

215. ## I.E.D

How do you envision applying your sketching skills in college?

216. ## algebra 1

find the length of the following segment created by these pairs of endpoints: (0,1), (6,6)

217. ## math

if we need 5 oranges to make 3 small glasses of orange juice, how many small glasses of juice can we make with 100 oranges?

218. ## Physics

Push a loaded grocery cart by a distance of 50m exerting horizontal force of 30N on the cart at an angle of 53degrees, how much work would you do on the cart?

219. ## math

find the perimeter of a triangle whose vertices are the followinf specified points in the plane? (-5,4)(2,9)and(10,-5)

220. ## chemistry

how are the ionization energies evidence for the structure of the atom especially the electron configurations for atoms ?

221. ## physical

A dog is pulled at an angle of 30 degrees with the horizon using a tension of 450N. If the sled has a mass of 50kg, then find the recoil, forward force and acceleration (if any)?

222. ## math

how do you simplify the fraction 5ccd/15c? and what do the "c" and "d" stand for?

223. ## Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

224. ## integrated math

consider the line equation y+5=11-x. which of the following points lie on this line? (more then one answer.) A. (5,1) B. (0,0) C. (5,11) D. (11,-5) E. (11,5)

225. ## Algebra 2 Expected values

Sarah draws cards from a deck of 52 cards. She receives \$.40 for each heart, \$.50 for an ace, and \$.90 for an ace of hearts. If each draw costs \$.15 should she play the game?

226. ## Social Studies 8R (2nd question)

Why do some call him a Capatain of Industry? Now for this question I know why, is because since he a industrialist, he controlled many railroads. He was on of the richest man in america. right????

227. ## sentence and paragraph

8–12 sentences..You’ve applied for a specific job in your field of study. The Human Resources Department arranges an interview and tells you to bring with you a polished piece of writing for them to evaluate your writing skills. The paragraph must

228. ## math

If a bar code contains a letter followed by a digit from 1 to 9 followed by another letter how many different codes are possible?

229. ## Algebra

i am having problems understanding.... i don't know how to put it so i will just put what the problem is Write the slope-intercept form of an equation of the line that passes through the given point and is parallel to the graph of each equation 13. (2,-7)

What effect does the magnetic field have on the speed of the particle?

231. ## pltw

How would you teach sketching to a student next year?

232. ## math

I am a number between 50 and 60. One of my factors is 28. What number am I?

233. ## Chemistry

Calcium carbonate can be used as an antacid to treat excess stomach acidity. What type of substance is calcium carbonate? a. base b. reducing agent c. acid d. buffer

234. ## Precalculus

An open box is to be formed from a square sheet of carboard (square is 10x10 cm) by cutting squares and then folding up the sides. (the squares cut off are just the corners as they are labeles as an x by x). A) Find a function for the volume of the box.

235. ## math

Are fact families for even and odd numbers?

236. ## Physics

A cannon ball is fired with a velocity of 200 m\s2 at an < of 25° above ground. The total flight time is 45.6 seconds. (Neglect air resistance.) a. Calculate the initial horizontal\vertical components of the velocity b. Calculate maximum height of the

237. ## Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

238. ## Math

Cari Bean was on her way to the islands in her yachet. Because of the waves and the currents, she was making irregular progess. The first day she traveled 100 miles. The second day she traversed 120 miles, and the third day only 90 miles. On the fourth day

239. ## Math

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 5 times. Is that

240. ## Biology

WHAT ORGANELLE IN THE ANIMAL CELL AIDS IN DIGESTING OLDER CELL PARTS AND WASTES?

241. ## SS8R - (2nd question) help!

business rockefeller control???????? i only thing I know is that he formed a Standard Oil Company.... does that count is there any other business he control (looked up on wiki, not there...)

242. ## Math

I am having a hard time doing equivalent fractions. Would 3/5 of 2/9 be equivalent? Please help

243. ## Gen Chem

what is the formula weight for CuSO4 5H2O?

244. ## LATIN

Obey the divine law and tell us the truth now! I need help translating these into Latin please

245. ## Physics

Consider a NASA spacecraft in a circular orbit 440 km above the surface of Mars. What is the spacecraft's orbital period in hours?

246. ## Chemistry

a compound decomposes with half life of 8seconds and is independent of concentration.how much time is consumed to convert the concentration of one sixteenth of its initial concentration?

247. ## organic chemistry

how do the flow rate of the carrier gas and the column temperature affect the retention time of a cocompound on a GC column

248. ## Math

Two pieces of leather in the shape of the number 8 are used to make the surface of the ball used in the game of softball. The radius of the softball is 3.6 cm. What area of leather is required to make one of the figure 8 pieces?

249. ## computers

When running SNORT IDS, why might there be no alerts?

250. ## Precalculus

find the equation of the cubic equation show graph passes through the points (3,0) and (1,4) and is tangent to the axis at the origin??? I honestly cannot figure this out and can you explain the graph to me too?

251. ## physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

252. ## english

what is the order of imortance? whoever answers this gets to meet my mom the mayor!!!!!!!!!!!!!!!!!!!!

253. ## Physics

2. Contrast the metric units of distance, time, and speed. Describe the relationship between them.

254. ## Art

What is most remarkable about the painting of Peter Breugel the Elder?

255. ## Physics

The length of the rod will become exactly half of its original value. The length of the rod remains the same. The length of the rod will decrease. The length of the rod will increase. Wouldn't the length double, thus being answer D?

256. ## Algebra

I don't get how you do this please help, thanks! Write the equation in the form ax+b=0. Then write the related function y=ax+b. 5x+2=7

257. ## Math

a square is cut in half and made into 2 rectangles 9 inches long. What was the area of the the square?

258. ## Social Studies 8R - HELP!

Why do you think some people called Vanderbilt Robber Baron? to be honest with you I HAVE NO IDEA??? please help me!!!!

259. ## physics

State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS Is a -6.75DS?....

have no idea what these answers are. Thanks! 1. Explain in detail one of the climate change cause-and effect relationships. 2. Explain why a new moon is not visible and the difference between the waxing and waning phases of the moon.

261. ## math

a basketball team wins 77 games but had lost 63 games. haw do you find percent of of game won?

262. ## physicsssss

3. A 885g mass to a verticle spring of force content 160N/m oscillates with a maximum velocity of .38m/s. Find (a) the period, (b) the amplitude, and (c) the maximum magnitude of acceleration.

263. ## Statistics

In practical use, oral contraceptives have a 5% chance of failing. If a doctor has 10 patients using oral contraceptives, what is the probability that at least 1 will get pregnant?

264. ## physics-HELPP

A 50.0 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with a speed of 27.0 m/s. If the player was moving upward with a speed of 2.80 m/s just before impact. (a) What will be the speed of the ball

265. ## physics

If a race car completes a 4mi oval track in 73.2s, what is the average speed in units of mi/h?

266. ## Physical Science

If liquid pressure were the same at all depths, would there be a buoyant force on an object submerged in the liquid?

267. ## Math

Mrs. Yale wrote a number between 35 and 48 on her board. The sum of the digits is 7. What number did Mrs. Yale write on her board?

268. ## Physics

3. A 2000 kg sports car moves in a horizontal circular path of 150 m\radius at a constant speed of 80 m\s. a. magnitude of centripetal acceleration b. magnitude of centripetal force

269. ## computers and math

Do you know any websites that have virtual place value blocks for making decimals. Please make suer i can acctually make the decimal on the websites. Lastly make sure it s a websites that i can stay on for as longt as i want without the website saying that

cscx/1-sinx

271. ## math

Write a formula for this sequence: 50, 83, 116, 149,... I just don't know how to find it..

272. ## Biology

WHAT ORGANELLE AIDS IN TRANSPORTING SUBSTANCES?

273. ## science

what is the density if the mass is 17g and the volume is 34cm3 ?

274. ## SS8R - help!

organizations named after rockefeller so far I got.... Rockefeller Center the Rockefeller Foundation is there more because that's all I found when I google it

275. ## Biology

WHAT CELL PART AIDS IN MOVEMENT AND INCREASES THE SURFACE AREA?

276. ## Biology

WHY WOULD PLANT CELLS HAVE 1 LARGE CENTRAL VACUOLE AND NOT SEVERAL SMALL ONES LIKE IN AN ANIMAL CELL?

277. ## math

How ma ny dots in array? ....

278. ## Physics

1. 125g mass attached to a string oscillates with an amplitude of 7.8cm and a maximum speed of .625 m/s. Find (a) the force constant and (b) the period of motion.

279. ## college chemistry

How many gram of Zn would be necessary to produce 534 grams of Fe by the sequence of reactions shown below? Step 1 Zn + HCl ==> ZnCl2 + H2 Step 2 Fe2O3 + H2 ==> Fe + H2O

280. ## Chemistry

Can someone please explain this problem step by step. How would you prepare 1000.0ml of 0.600M NaOH solution starting from concentration of 1.000M

281. ## math

if you are playing a game to toss a ball in a basket through a target what is the probability that you will win?

282. ## Chemistry

If you used 2300 kcal you expend in energy in one day to heat 6.0 * 10^4g of water, what would its new temperature be

283. ## physics

A 50.0 kg soccer player jumps vertically upwards and heads the 0.45 kg ball as it is descending vertically with a speed of 27.0 m/s. If the player was moving upward with a speed of 2.80 m/s just before impact. (a) What will be the speed of the ball

284. ## Precalculus

If p(x) is a cubic polynomial such that p(0) = 0, P(2) = -4 and P(x) is positive only when x > 4 find p(x).

285. ## Physics

For the first part of this question I got 12.12m/s B. With the help of a friend the boy measures the height to which the ball returns and finds it to be 5.2 meters. How fast was the ball moving when it left the ground? I wrote this down mass of ball:

286. ## English ms. sue

ms. sue I doing project on catcher in the rye book, and could you please tell me what this quote means? what do it tell about Holden? Take most people, they're crazy about cars. They worry if they get a little scratch on them, and they're always talking

287. ## Financial Management

As the financial analyst for a corporation, you are evaluating various types of bonds. The firm is gathering research about bonds currently issued. Understanding how to properly value a vanilla bond (a plain bond) is essential for finance. 1) What makes

288. ## physics college

A rocket booster fires in space with a force of 500N and moves the 10kg satellite from rest to motion in 2.1 seconds. Find the acceleration? What is the final speed of the satellite?

289. ## Math

The volume of a cylinder is 330 cm^3 . What are the dimensions of the cylinder (radius and height)?

290. ## Physics

A satellite has a mass of 6179 kg and is in a circular orbit 4.83 × 105 m above the surface of a planet. The period of the orbit is 2.4 hours. The radius of the planet is 4.03 × 106 m. What would be the true weight of the satellite if it were at rest on

291. ## English

Based on the following description of the Nun, which word BEST describes her? At meat her manners were well taught withal; / No morsel from her lips did she let fall, / Nor dipped her fingers in the sauce too deep; / But she could carry a morsel up and

292. ## Math

When it is cold outside, Maria wears more layers of clothes. When it is warm outside, she wears fewer layers of clothes. What is the independent variable in Maria’s decision on how many layers of clothes to wear? A outside temperature B number of layers

293. ## Math

a square is cut in half and made into 2 rectangles 9 inches long. What was the area of the square?

294. ## Math

How will I work this problem? Find the functional values requested in the problem. h(x)=3x-4 (a) h(0) = (b) h(-10)=

295. ## Math

Julie is solving the equation x2 + 6x + 9 = 0 and notices that the discriminant b2 - 4ac has a value of 0. This tells her that the equation has

296. ## English/Literature

I have to write an essay, but I just need help with coming up with some ideas. In the essay, I have to compare/contrast the plays "Ajax" OR "Electra" (both are by Sophocles) with the "Iliad" (by Homer). I CANNOT mention similarities/differences in plot

297. ## physics

State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS Is a -6.75DS?....

298. ## Math

If a rectangular board has an area of 30 square feet, what are the possible measurements of its length and width

299. ## Math

Frank saved 50% by purchasing his airline ticket early. His wife paid full price. If their total was \$294 how much was Franks's ticket only?

300. ## I.E.D

How would you teach sketching to a student next year?

301. ## Computers

May you please identify poor computer ergonomics.

302. ## Biology

HOW DOES A CELL WALL HELP WITH “TURGOR PRESSURE?”

303. ## Physics

Trying to find escape speed from a planet and I am given the radius and gravitational field - g = 18 m/s^2. I have the conservation of energy, final energy is zero, I have the formula for V = sqrt 2GM/r, u = mgy. I have too many unknowns...I can't solve

304. ## Biology

WHY WOULD PLANT CELLS HAVE 1 LARGE CENTRAL VACUOLE AND NOT SEVERAL SMALL ONES LIKE IN AN ANIMAL CELL?

305. ## Math!!!!!!!

How do you solve problems like -1/2+1/3 or -3 1/5+-6 1/2 without a number line? Thank to everyone who helps! I posted this question at 10ish but noone helped so I'm posting it again.

306. ## Physics

a) What is the magnitude of the gravitational force that the Sun exerts on Saturn? b) What is the magnitude of the gravitational force that Saturn exerts on the Sun?

307. ## Math

Is one a prime?

308. ## science

What is the velocity of a car traveling from the east coast to the west coast at an average speed of 50 kph?

x/-14

310. ## Math

Add or subtract Write in simplest form Weather in January through March Death Valley gets a total of about 21/25 inch of precipitation. In April through June it gets a total of about 6/25 inch. How much more precipitation occurs in January through March

311. ## math

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 9 times. Is that

312. ## math

-4 - (-8) = I got 4 is this correct -2 - (-6) = Again I got 4 is this also correct

313. ## ict

answer for ict crossword home work following the same pattern

314. ## physics

Why should the value of moment of inertia be relatively close to one another for two different mass but on the same body?

315. ## algebra 1

1. Solve the linear system using substitution. 4x-y=5 4x+4y=-4

Can you guys help me please? I have no idea what these answers are. Thanks! 1. Explain in detail one of the climate change cause-and effect relationships. 2. Explain why a new moon is not visible and the difference between the waxing and waning phases of

317. ## CHEMISTRY

Are you always solving for final volume in the combined gas law?

318. ## Math

frank saved 50% by purchasing his airline ticket in advance. His wife paid the full price. If their total charge was \$294, how much was Frank's ticket only?

319. ## english

the father, along with his oldest son are

320. ## math

how do you figure out the diameter of a pipe that is 40 feet high and holds 200000 gallons

321. ## phi 103

"If that wasn't illegal, then it wouldn't be against the law" may commit which fallacy?

322. ## physics

You drive a car for 2.0 h at 35 km/h, then for another 2.0 h at 64 km/h. (a) What is your average velocity? (b) What is your answer if instead you drive 99 km at each of the two speeds?

323. ## Algebra

Year, t Sales, S(t) 1 62 2 246 3 664 4 1579 5 3258 6 8430 7 14,532 (c) If S−1 exists, find S−1(3,258).

324. ## algebra

can you show me how to do these problems solve the equation by finding the exact solution 1/3x-2=2 b) 1/3log(x)-log(100)=2 c)ln(x)-ln(5)=7

325. ## Algebra 1

Change 3y-x=0 into slope intercept form

326. ## physics

You drive a car for 2.0 h at 35 km/h, then for another 2.0 h at 64 km/h. (a) What is your average velocity? (b) What is your answer if instead you drive 99 km at each of the two speeds?

327. ## human services

Identify three considerations that should be part of the program and proposal preplanning process of grant proposal writing.

328. ## arithmetic

If a blue box has 5 times as many marbles as a red box and the blue box has 24 more marbles than the red box how many marbles are in each box?

329. ## Chemistry

why would a molecule change color under acidic or basic conditions?

330. ## English

If we can produce the final draft within next week, we can finalize this treaty by the end of this month. (Is this sentence grammatical? Would you correct any errors?)

331. ## chemistry

If I have liquid that contains 10% metanol, that freezes on -20C. How many etanol i must add? I used f-la delT=Kf*b b=10,75 m=? where i use proc. of metanol and etanol. What graphic or f-la i use for this? Thank you

332. ## Physics

How do I find the instantaneous acceleration of the earth orbiting the sun? Everything I am trying is incorrect. I am using 1 second as my time and get 1.99E-7 rads/second. First I tried: acceleration = theta x t / radius Where: theta = 1.99E-7 rads radius

333. ## Math

Malia runs twice as fast as Eileen. If Malia and Eileen start from the same point and run around a circular track in opposite directions, how many times will they pass each other if they stop when Malia completes her sixth lap? I figured 9 times. Is that

334. ## Math

A set of 12 identical metal ballbearings was made from 10 cm^3 of metal. Calculate the radius of each ball bearing.

335. ## Boolean algebra

Simplify this function using Boolean algebra laws? I am stuck on this part of my homework (x2'x1'x0') + (x2'x1x0) + (x2x1x0') I know you have to use distributive laws to do this. Any help is appreciated. Thank you.

-8p-12+7p

337. ## Physics

a quaterback throws a ball to a stationary reciver wo is 15.2m down the feild. the football is thrown at an initial angle of 42 dagrees. acceleration is 9.81m/s^2. what is the initial speed that quaterback must throw the ball to hit the reciver?

338. ## chil development

keeping systematic record of observations of children provid useful information for

339. ## Chemisttry

How would you make 0.1 N HCL using 12M HCL?

340. ## Math

Find three ordered pairs that satisfy the question. y=3x-6 (0,__), (1,__), (2,__)

I have to review a restaurant. What criteria should i include in my paper?

342. ## Computers

What are some computer work related disorders?

343. ## English

1. They are wearing brand name shoes. 2. They are wearing brand-name shoes. 3. They are wearing name brand shoes. 4. They are wearing anme-brand shoes. (Which one is correct?)

344. ## Social Studies

How Rockefeller was able to take control over the entire oil industry?

345. ## physics

State the surface powers required to produce the following lenses with +6.25D front curves. a. -0.50 DS b. +0.50 DS c. +1.75 DS Is a= -6.75D? b= -5.75D? c= -4.75D?

346. ## algebra

if integers x and y satisfy 2008x=16y , the smallest possible value of x+y is______.

347. ## math

steps to solve 2(x+2)=8

348. ## spelling

what does distinguish mean

349. ## Math

A new quarterback has to pick two number that will go on his football shirt. How many pair of number can be make from the digits 3,5,7,and 9? What are all the possible choice?Explain how you arrived at your answer.

72-25

351. ## Math

What inequality will equal -2 and 8?

352. ## English

What is the subject in this sentence Each family of potters has it's own special designs.

353. ## math

Show 2 more in a set with 5. Show 3 less in a set with 12.

354. ## math

m=-3, n=2,p=-1 find the value m(p-n)2/3p+m

355. ## science

what is the definition of special properties