# Questions Asked onApril 3, 2014

1. ## Spanish- Sin a or a

I have to chose whether or not the sentence needs preposition a or no a (sin a) 1) ¿Conoces__ alguien que organice fiestas de aniversario? 2)Busco__ alguien que me ayude a organizar la mía. 3)Necesito __ un grupo musical que sea bueno. 4) Lo siento, no

2. ## Algebra

A model rocket is launched from a roof into a large field. The path of the rocket can be modeled by the equation y = –0.06x² + 9.6x + 5.4 where x is the horizontal distance, in meters, from the starting point on the roof and y is the height, in meters,

3. ## Calculus1

The strength, S, of a rectangular wooden beam is proportional to its width times the square of its depth. Find the dimensions of the strongest beam that can be cut from a 12 inch diameter cylindrical log.

4. ## chemistry

Based upon the intermolecular forces present, rank the following substances according to the expected boiling point for the substance: MgF2, H2O, HCl, N2

5. ## Physics

Alice is going on a picnic and is aware that it will be easier to carry the picnic basket if it balances at the center where the handle is attached. She has placed a 1.55-kg container of potato salad at one end and a 0.675-kg package of hot dogs at the

Find Net Ionic equation for hydrolysis , Expression for equilibrium constant (Ka or Kb) and Value of (Ka or Kb) Net Ionic equations I've got NaC2H3O2 == CH3COO^-+H2O -->CH3COOH+OH^- Na2CO3 ==== CO3 + 2H2O → H2CO3 + 2-OH Kb = [H2CO3] [-OH]2 / [CO3]. Kb =

7. ## Chemistry

(NH4)2S is a strong electrolyte. Determine the concentration of each of the individual ions in a 0.200 M (NH4)2S solution. [NH4] = M [S] = M

8. ## math

a rectangular painting including the frame is 28 inches wide and 24 inches tall.the opening inside the frame is 24 inches wide and 20 inches tall.what is the area covered by the frame

9. ## Algebra

If an object is dropped from a height of 144 ft, the function h(t) = –16t² + 144 gives the height of the object after t seconds. When will the object hit the ground? • 1.5 s • 3 s • 6 s • 9 s

10. ## English II B

Deana created a computer-assisted slide show. To make the slide show legible, what is one thing she needs to avoid? A)typing bullets in a small font B)adding color and effects to the font C)printing handouts on paper D)adding tables and graphics

11. ## science

An ideal gas for which Cv = 3R/2 is the working substance of a Carnot engine. During the isothermal expansion, the volume doubles. The ratio of the final volume to the initial volume in the adiabatic expansion is 5.7. The work output of the engine is 9 x

12. ## Probability

The random variable X is uniformly distributed over the interval [θ,2θ]. The parameter θ is unknown and is modeled as the value of a continuous random variable Θ, uniformly distributed between zero and one. Given an observation x of X, find the

13. ## English II B

Need Help Please. A student is thinking about different forums for publishing an editorial. Which of the following would be appropriate? 1.a dramatic reading 2.an anthology 3.a poetry contest 4.a school newspaper

14. ## English II B

What is the term for a magazine that is published on the computer? 1. computerized slide show 2. online publication 3. electronic portfolio 4. electronic bulletin board

15. ## Math help!!!! Thanks in advance!!!!!!!!!!!

Activity |Boys|Girls| Total Walk|3 |6 Bike| 5| 3 Skateboard 2 | 1 Total 1. How many students chose walking as their preferred method of transportation? 6 3 9 none of these 2. How many total students participated in the survey? 10 20 15 none of these 3.

16. ## Science

Physical properties used to indicate temperature changes include all of the following except a. color changes of liquid crystals b. volume changes of fluids and solids c. changes in electrical resistance d. odor changes in solids

17. ## optimization

Farmer taylor wants to fence a rectangular area of 1800 square feet and divided into 3 parts by fencing parallel to the shorter side. What is the minimum amount of fencing for this job?

18. ## science

PLEASE HELP GUYS An ideal gas for which Cv = 3R/2 is the working substance of a Carnot engine. During the isothermal expansion, the volume doubles. The ratio of the final volume to the initial volume in the adiabatic expansion is 5.7. The work output of

19. ## geometry

a circle of radius 1 is inscribed in a square. A smaller circle is tangent to two sides of the square and the first circle. Determine the circumradius and inradius of the smaller circle

20. ## physics

. A sonar signal is sent from a ship and the signal returns from the bottom 3.65 s later. How deep is the ocean if the speed of sound in water is 1,530 m/s?

21. ## percentages/word problem

A refrigerator costs a company $1,600 to manufacture. If it sells for$3,456, what is the percent markup based on cost? (Round to the nearest whole percent.)

22. ## chemistry

Sodium metal adopts a body-centered cubic structure with a density of 0.97g/cm3. A. Use this information and Avogadro's number to estimate the atomic radius of sodium. B. If it didn't react so vigorously, sodium could float on water. Use the answer from

23. ## Algebra

A catapult launches a boulder with an upward velocity of 184 feet per second. The height of the boulder, (h), in feet after t seconds is given by the function h(t) = –16t² + 184t +20. How long does it take the boulder to reach its maximum height? What

Some people believe in the force (yes, like in Star Wars). To test if young Anakin Skywalker has the force with him, he is told that some cards that Yoda can see but Anakin cannot contain a picture of a planet, a lightsaber, a laser rifle, or a spaceship.

25. ## Physics Help

A graph of wavelength vs. 1/frequency should be a straight line. What are it's slope and y-intercept? I'm not given any graphs or numbers, just this question. And I know that Velocity = frequency x wavelength And that slope is found by rise/run and m=

26. ## Probability

We have k coins. The probability of Heads is the same for each coin and is the realized value q of a random variable Q that is uniformly distributed on [0,1]. We assume that conditioned on Q=q, all coin tosses are independent. Let Ti be the number of

27. ## physics

A jogger with a mass of 66.0 kg reaches the top of a staircase in 44.0 s. If the distance from the bottom to the top of the staircase is 14.0 m, how much power will the jogger create in climbing the stairs?

28. ## Physics

A baby whale gets lost from his mother while swimming through a large underwater canyon. Frantically the baby whale yells for his mommy. 1.5 seconds later, the whale hears his yell's ECHO from the canyon wall. How far is it to the canyon wall? The speed of

29. ## physics

Find its density. Express your answer to two significant figures and include the appropriate units How does this compare with the density of water? Express your answer using two significant figures.

30. ## Health

Which would produce a greater number of Calories- a pound of lean meat or a pound of butter? Why is it so?

31. ## English II B

A student has completed a freewriting exercise. The result is a paragraph exploring the general theme of war in a literary text. What is the next step in the writing process? 1.gathering details 2.beginning an outline 3.writing an introduction 4.narrowing

32. ## probability

The lifetime of a type-A bulb is exponentially distributed with parameter λ. The lifetime of a type-B bulb is exponentially distributed with parameter μ, where μ>λ>0. You have a box full of lightbulbs of the same type, and you would like to know

33. ## Probability

Let X=U+W with E[U]=m, var(U)=v, E[W]=0, and var(W)=h. Assume that U and W are independent. The LLMS estimator of U based on X is of the form U^=a+bX. Find a and b. Express your answers in terms of m, v, and h using standard notation. a=- unanswered b=-

34. ## Probability

Let N be a geometric r.v. with mean 1/p; let A1,A2,… be a sequence of i.i.d. random variables, all independent of N, with mean 1 and variance 1; let B1,B2,… be another sequence of i.i.d. random variable, all independent of N and of A1,A2,…, also with

35. ## PHYSICS

A rock is thrown vertically upward with a speed of 14.0m/s from the roof of a building that is 70.0m above the ground. Assume free fall. In how many seconds after being thrown does the rock strike the ground? What is the speed of the rock just before it

36. ## Biology

Which is the highest? Ecosystem population community

37. ## physics

How you find the oscillation period of a mass if not given the mass, or spring constant? A mass is attached to a vertical spring, which then goes into oscillation. At the high point of the oscillation, the spring is in the original unstretched equilibrium

38. ## English

What is the purpose of prewriting in the writing process? A) to help polish your writing B) to find details to complete paragraphs C) to organize your thoughts within a draft D) to help develop a topic for writing

39. ## chemistry

Sodium metal adopts a body-centered cubic structure with a density of 0.97g/cm3. A. Use this information and Avogadro's number to estimate the atomic radius of sodium. B. If it didn't react so vigorously, sodium could float on water. Use the answer from

40. ## Algebra 2

Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn!F(h) = x^2-9/x^2-4x+3

41. ## English

What is the best strategy for organizing an essay to describe events in time sequence? A)comparison and contrast B)order of importance C)chronological D)spatial

42. ## science

To solve the problem of a polluted stream a scientist traced where the pollution came from. She determined that the pollution was coming from many small sources. She worked on a plan to help reduce the pollution to the stream. This is an example of

43. ## Science - Check my answers

1. Which of the following statements best defines tides? when waves get bigger because of an approaching storm the rise and fall of ocean water that occurs about every 12.5 hours **** the rise of ocean water that occurs 12 times a day a giant wave that can

44. ## physics

In the sketch, the small hydraulic piston has a diameter of 2.5cm cm . The large piston has a diameter of 6.4cm cm . For each newton of force applied to the small piston, how many newtons of force are exerted by the large piston? Express your answer using

45. ## physics

Calculate the water pressure at the base of the Hoover Dam. The depth of water behind the dam is 220m m . Express your answer to two significant figures and include the appropriate units

46. ## math 7

grade 7 students were surveyed to determine how many hours per day they spent on various activities. The results are shown in the circle graph below. about how many hours per day altogether were spent on watching TV and homework?

47. ## science

A 2.1-kg brick is placed gently upon a 2.9-kg cart originally moving with a speed of 26 cm/s. Determine the post-collision speed of the combination of brick and cart.

48. ## Physics

Consider the following distribution of objects: a 4.00-kg object with its center of gravity at (0, 0) m, a 1.20-kg object at (0, 3.00) m, and a 5.40-kg object at (2.00, 0) m. Where should a fourth object of mass 7.00 kg be placed so that the center of

49. ## science

What causes mid-ocean ridges to form?

50. ## science

How can water cause both mechanical and chemical weathering?

57. ## chemistry

the lattice energy for MgCl2 is -2326 kj/mol, which is much higher than that for NaCl which has a lattice energy of -786 kj/mol. Why is this so? Give at least two contributing factors.

58. ## Probability

Caleb builds a particle detector and uses it to measure radiation from a remote star. On any given day, the number of particles, Y, that hit the detector is distributed according to a Poisson distribution with parameter x. The parameter x is unknown and is

59. ## math - 6th grade

HELP! How do I solve for x: 4x+2=3x+9

60. ## Math

A prototype rocket burns 159 gallons of liquid hydrogen fuel each sound during a regular launch. Make a table that shows how many gallons of fuel are burned after 2,3,5, and 10 seconds.

61. ## physical science

why it is necessary to apply sunscreen to your skin and wear sunglasses when you want sunbathe on the beach?

62. ## Algebra

Simplify (X^3)^-4(-2x^-2)^-3

63. ## PRE CALC

Evaluate: sigma notation of (3cos k(pi) +1) start value: k=0 end value: k=3

64. ## physical science

what is the importance of ozone in the stratosphere for your health?what will happen to us when ozone depletion becomes more serious?

65. ## geometry

You are given a sheet of paper with the following diagram on it. You are also told that the two circles have the same radii and you are given a straight edge. Draw an isosceles triangle. N.B. you do not know where the centre of either circle is, you do not

66. ## Algebra

4/b+1 + 1/b2-4 + 5/b+2

67. ## statistics

à manufacturer of computers designed to aid social scientists in analyzing research data clams that his computers are opérational for at least 80 percent of the time. during the course of the year one computer was operational for 270 days. test, 1

68. ## maths

compare and contrast the alpha error and the beta error. how can the two be corrected in the same research?

69. ## maths

what is the total of £3.89 x 589

70. ## Maths please someone help me out!!!

3. The efficiency of an industrial pump decreases by a fixed percentage each year. The percentage decrease each year is with respect to the efficiency of the pump at the start of each year. Over each four year period, the efficiency decreases by 80%. Let

71. ## Math

How many years would it take a worker making $40 per hour to earn$8,000,000, assuming she works 240 8-hour days per year?

72. ## Employee Training and Development

The major difference between internet-based training and intra-net based training is:

73. ## math

what is a leading interval of 5 does it mean 4 or 6

74. ## Physic

Why is the potential difference between the terminals of a battery is not always equal to the e m f of a battery

75. ## English

What is the purpose of a response-to-literature essay? A) to entertain B) to persuade C) to analyze D) to compare and contrast

76. ## social studies check answers

Im not sure these are right.I Tryed my best :D. 1.A 2.B 3.C 4.A or B 5.B 1.“Along the southern coast of Brazil the central plateau descends in high, steep escarpments. It towers over the waves and moves back in ridges, leveling off from the peaks of the

77. ## math

sue spends 2 1/4 hours taking inventory and 1 1/2 hour restocking. how many hours did she work

78. ## Physics 141

The drawing shows a bicycle wheel resting against a small step whose height is h = 0.125 m. The weight and radius of the wheel are W = 23.1 N and r = 0.330 m, respectively. A horizontal force vector F is applied to the axle of the wheel. As the magnitude

79. ## Math - Int Trig

Given the functions: f(x)=2x+2 g(x)=3/x^2+2 h(x)=sqrt(x-2) Find the following 1) (f∘g)(-5) 2) (h∘g)(3) 3) (g∘h)(-2) 4) (g∘g)(-2) 5) (f∘h)(12) Find the following and state the domain: 6) h∘g 7) f∘g 8) g∘f 9) g∘g 10)g∘h

80. ## Math

John spoke to his friend from 10:15am-11:00am. And then John spoke to that same friend again from 12:30pm-1:15pm. altogether, how many minutes did John speak to his friend? How do I figure this out?

81. ## science

1. Why is the periodic table usually drawn with hydrogen (H) separated from the rest of the elements?

82. ## science

Finely ground sane can be poured like water. Why is sand considered a solid rather than a liquid? How is sand different than liquids?

83. ## Math

Solve by factoring: 4x^2+12x+9=0

84. ## Physics 141

The drawing shows a person (weight W = 586 N, L1 = 0.837 m, L2 = 0.397 m) doing push-ups. Find the normal force exerted by the floor on each hand and each foot, assuming that the person holds this position. force on each hand N force on each foot N

85. ## PHYSICS!!!

A boat moves at 7.00m/s relative to the water. (You can neglect relativity at these slow speeds.) The boat travels 100 m downstream and then 100 m upstream, returning to its original point. Find the time for the round trip

86. ## social studies 9

explain why the mohawks and the other first nations would choose to become allies with europeans, even though they knew that all the europeans were a threat to their territory and way of life

87. ## Resources for educating young children

A portfolio should?

88. ## Science

To solve the problem of a polluted stream a scientist traced where the pollution came from. She determined that the pollution was coming from many small sources. She worked on a plan to help reduce the pollution to the stream. This is an example of

89. ## chemistry

A certain acetic acid solution has pH = 2.14. Calculate the volume of 0.0900 M KOH required to reach the equivalence point in the titration of 35.0 mL of the acetic acid solution.

90. ## math-urgent

1. two cards are drawn from a standard of 52 cards. Find the probability that the second card is a spade given that the first card is a club. 2. Suppose you draw 3 cards from a standard deck of 52 cards . Find the probability that the third card is a club

91. ## Very tough maths

The number of ways there are to arrange 6 distinct rooks on a 10x10 board such that none of them can attack each other is n. Find the product of the non-zero digits of n.

92. ## GAMMAR

State the "Tenses" : 1) If it rains like this for a few more hours, the roads will all be waterlogged. 2) He will have finished reading the book by evening. 3) what was he doing when she came?

93. ## Chemistry

A 26.0 g sample of ice at -17.0°C is mixed with 124.0 g of water at 81.0°C. What is the equilibrium temperature?ºC.

94. ## Social studies

How did the colonists attempt to work together between 1754 in 1776 show changes of the relationship with Britain

95. ## chemistry

what is the oxidation half-reaction in the following chemical reaction? fe(s) + 3 agno3 -> ag + fe(no3)3

96. ## Grammar

Fill in the blanks with the chosen words. words: after and till because as but for if when since so though unless until while or 1) The children went home. It was getting dark. 2) The boys were allowed to read books. The teacher was absent. 3) Mother told

97. ## Pre calculus

P=(-2,2) Q=(3,4) S=(2,-8) PS-3PQ Find the component form and magnitude of the vector.

98. ## Math

The great white shark can grow can to a length of 4.9m. The mako shark can grow to a length of 40 dm. Which shark can grow to the greater length?

99. ## social studies

1. which action was NOT an example of telling against society in the 1920s in the united states? a. going to speakeasies b. dancing the Charleston c. women bobbing their hair d. women working outside the home 2. what is the main reason businesses made

100. ## science

1. Why is the periodic table usually drawn with hydrogen (H) separated from the rest of the elements? 2. Finely ground sane can be poured like water. Why is sand considered a solid rather than a liquid? How is sand different than liquids?

101. ## math

Alice has 1/5 as many cars as Sylvester has. Sylvester has 35 cars. How many cars does Alice have? My answer is 7 cars

102. ## English

List as many details as you can for each of the topic sentences. 1. Walking briskly for a mile after a day sitting at a desk helps dispel fatigue. Purpose: To explain 2.Bird watching in the woods is relaxing as well as educational Purpose: To convince

103. ## Calculus1

derivative of h(x)= 3(√x) - x(√x)

104. ## math

1.06(0.8n)represents the total paid for a jacket. What does this represent about the cost of the jacket?

105. ## Pre Algebra

The low temperature for 6 consecutive days in a Montana city were 9°,3°,4°,16°,11°,and 5°. What would the low temperature have to be on the seventh day to have a mean low temperature of 6°for the week?

106. ## Physics

What is the energy of a single photon with a frequency of 7 x 10^8 Hz. (hint Planck's constant = 6.626 x 10^-34) To type an answer in scientific notation, use 'e'. For example, Planck's constant would be typed in as 6.626e-34.

107. ## Calculus

Determine whether the series is convergent or divergent. If it is convergent, find its sum. If it is divergent, enter NONE. sum from 1 to infinity of 1/e^2n. It is convergent, but I do not know how to solve for the sum.

108. ## Calculus

Determine whether the series is convergent or divergent. If it is convergent, find its sum. If it is divergent, enter NONE. sum from 1 to infinity of (5^n+4^n)/20^n It is convergent, but I do not know how to find the sum.

109. ## geometry maths

a circle of radius 1 is inscribed in a square. A smaller circle is tangent to two sides of the square and the first circle. Determine the radius of smaller circle and larger circle

110. ## Spanish

This is online homework that I have done but I am having trouble with 3, 5, 6, 7, and 8. For 3 i put l, for 5 d, for 6 b and for 8 i. But they were in correct. 1) (blank) esta todo bien y esperamos que 2) (blank) tambien lo este. 3) (blank) lo pensemos y

1.B 2.C 3.A 4.B 5.D 1.“Along the southern coast of Brazil the central plateau descends in high, steep escarpments. It towers over the waves and moves back in ridges, leveling off from the peaks of the coastal ranges … As it continues along to the

112. ## science

The type of heat transfer called convection happens as a result of: a. electromagnetic waves b. the direct contact of particles in a substance c. the actual motion of a fluid in the form of currents d. All of the above I think it's C.

113. ## algebra

solve the equation 3/ (x+1) - 1/x =1/2

114. ## physics.

Rank the following from most to least for the percentage of its volume above the water line: A. Basketball floating in saltwater B. Basketball floating in glycerin C. Basketball floating in gasoline

115. ## Pre calculus

Find a unit vector in the direction of the given vector. v=(1,-1)

116. ## physics

A dike in Holland springs a leak through a hole of area 0.60cm 2 cm^2 at a depth of 1.4m m below the water surface. How much force must a boy apply to the hole with his thumb to stop the leak? Express your answer to two significant figures and include the

117. ## science

1. Describe 2 ways in which an electrically charged object and magnet are alike.

118. ## physics

Calculate the average force per nail when Sarah (following figure), who weighs 130 pounds, lies on a bed of nails and is supported by 600 nails. (Figure 1) Express your answer using two significant figures.

119. ## science

2. Why is it important to protect yourself from certain electromagnetic waves? What are some ways people protect themselves from these waves ?

120. ## pyhsics

The top floor of a building is 40m m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.

121. ## physics

The top floor of a building is 40m m above the basement. Calculate how much greater the water pressure is in the basement than on the top floor. Express your answer to two significant figures and include the appropriate units.

122. ## physics

Calculate the water pressure at the bottom of the 50-m {\rm m}-high water tower shown in the photo. Express your answer to two significant figures and include the appropriate units

123. ## science

discuss how the structure of a virus correlates with its function

124. ## science

Imagine that you are the scientist who discovered cells. If you were to give a speech to a group of fellow scientists, what key points would you include that describe your accomplishments?

125. ## Precalculus

Find a unit vector in the direction of the given vector. w=-1-2j

126. ## science

1. What causes mid-ocean ridges to form ? 2. Why are barrier islands important to people who live on the mainland ?

127. ## Chem

10.0 grams of barium chloride (208.3g/mol) is reacted with excess potassium phosphate and 7.22 of grams of barium phosphate (601.8 g/mol) is isolated. calculate the theoretical yield of barium phosphate

128. ## Math - Algebra2

Given the functions: f(x)=3x+2 g(x)=3/x^2+2 h(x)=sqrt(x-2) Find the following a) (f∘g)(-5) b) (h∘g)(3) c) (g∘g)(-2) d) (f∘h)(12) Thanks

129. ## physics

A particular person’s lower leg is 59 cm long and has a mass of 8.0 kg. If allowed to swing freely, with what time period would the leg swing? (Treat the leg as a simple pendulum with length equal to half the leg length and all the leg’s mass

130. ## poetry

is this a good poem about the hunger games ? 24 tributes from 12 districts 2 kids from each forced to fight to death Only one comes out alive With 23 others dead 24 tributes in total 12 districts in all As punishment for the rebellion Against district 13

131. ## Physics

The blades of a motor rotate at a rate of 4401 rpm. When the motor is turned off, the blades slow to a new angular speed of 430 rpm in 4.93 seconds. What is the angular acceleration of the blades (in rads/sec^2)?

132. ## science

How does Newton's first law of motion explain the movement of your body when in a car in which you are riding stops suddenly?

133. ## science

A researcher determined the amount of electrical energy entering a toaster and the amount of heat given off by the toaster. The amount of heat was less than the amount of electrical energy. How can this observation be explained?

134. ## science

What happens when light passes from one material to another?

Brianna invests $3,500, at 12% interest, compounded quarterly for 1 year. Manually calculate the compound interest for this investment. asked by tota 136. ## science The coils in a toaster convert electrical energy into thermal energy. Heat from the coils is used to toast the bread. How is the heat from the coils transferred to the bread? asked by victoria 137. ## math Scott invests$1,500, at 12% interest, compounded quarterly for 8 years. Use Table 11-1 to calculate the compound amount for his investment

how do varieties of informative and positive messages adapt the basic pattern?

139. ## Physics

A uniform beam of length L = 8.00 m and weight 3.80 102 N is carried by two workers, Sam and Joe, as shown in the figure below. Determine the force that each person exerts on the beam.

An experiment was conducted to determine the abrasion resistance of a new type of automobile paint. Twelve different strips of metal were painted with the new paint. The abrasion resistance of each piece was then tested on a machine. In the sample, the

141. ## science

Why is the periodic table usually drawn with hydrogen (H) separated from the rest of the elements?

142. ## science

Suppose you were asked to select one renewable energy resource for use in your town. Which would you select, and why?

143. ## Biographical Essay Evaluation (Writeacher)

Write a 3-paragraph Biographicl Essay. Discuss your experiences with summer: the things you enjoyed and the things you missed about school. What I have written: "A strong sense of freedom is one of my favorite things about summer. Setting in only once the

151. ## English

In what ways have social media made our lives easier?

155. ## High school math

What is 2 plus 2

156. ## Physics

A wheel 31.7 cm in diameter accelerates uniformly from 238 rpm to 347 rpm in 5.9 seconds. How far will a point on the rim of the wheel have travelled in this time?

157. ## percentages/word problem

A wholesaler buys plastic lamps for $18 each and sells them for$30.60. What is the percent markup based on cost?

158. ## Social Studies (History)

What did Germany, Italy, Japan, and the Soviet Union aka USSR have in common before WWII? please have four reasons and please explain why these countries had that similarity.

159. ## Biology

What are the three types of dispersion?

ertertertert

182. ## PHYSICS!!

Light travels at about 0.75c in water. A)What's the wavelength in water of light whose wavelength in vacuum is 418nm

183. ## physics

A crate with a mass of 80 kg glides through a space station with a speed of 2.5 m/s. An astronaut speeds it up by pushing on it from behind with a force of 210 N, continually pushing with this force through a distance of 8 m. The astronaut moves around to

184. ## french

what's wrong with this sentences? 1. Je m'amuse lire quand je m'ennuie. 2. Partie de sa routine quotidienne comprend à se regarder dans le miroir pour se raser avec un rasoir et de la crème à raser. 3. J’ai besoin habituellement de me dépêcher le

185. ## Math

find the 76th term for these numbers -2, 2, 6, 10, 14

186. ## Math

find the 93rd term for the following pattern. -3, -6, -9, -12,-15 these are equations

187. ## English

1. Because it was so late, we went home. 2. Because of its lateness, we went home. (Is #2 grammatical?)

188. ## english-poetry

how can i revise this haiku poem? lunch bell rings change clinking in our pockets striving for food

189. ## Math 2

Use the diagram to find the surface area of a triangular prism. Find the area of the two triangular faces. Then find the area of each of the three rectangular faces. What is the surface area? Describe how you solved the problem. Prism has numbers of 4, 3,

190. ## Maths

Jim has grades of 84, 65, and 76 on three math tests. What grade must he obtain on the next test to have an average of exactly 80 for the four tests?

191. ## Math 3

Zach needs to paint all the sides and the tops of these steps, but not the bottom. How many square feet does he need to paint? Explain how you solved dimensions 2,2,4 and 2,2,2. Thanks

192. ## Algebra

1. Find the quotient: e^2-e-12/e-4 A. e+3/e-4 b. e^2+3 C. e-3 D. e+3 2. Find the quotient: (a^2+11a+30) / (a + 5) A. a+6 B. a^2 + 10a+25 C. a^2 + 11a + 25 D. a+6/a+5 3. Find the LCM for x^2+3x+2 and x^2 +5x+6. A. (x+1)(x+2)(x+3) B. x+1 C. x+3 D. (x+1)(x+3)

193. ## mathematics

Find x when (x^3 ?2(x^2)?5x+6) is divided by (x-1)

194. ## math

How many miles does a person travel if she drives a car at 50 miles per hour for 3.5 hours?

195. ## mathematics

If ?2 is the solution of the equation 2x+1? 3c=2c+3x?7 find the value of c

196. ## math

If a 6-sided number cube is rolled twice, what is the probability that a 1 is rolled both times?

197. ## mathematics

Intergrate sin3x dx

198. ## mathematics

Find the maxizimum value of y in the eaquation y=1?2x?3(x^2)

199. ## mathematics

3(^2)+6x?2=0 solve the equation

200. ## math

If a sandwich shop sells lunches that include one sandwich and one side dish, draw a tree diagram to represent the number of combinations that are possible if the choices are a ham or turkey sandwich and chips or cookies as the side dish.

The wheels, axle, and handles of a wheelbarrow weigh W = 56.2 N. The load chamber and its contents weigh WL = 584 N. The drawing shows these two forces in two different wheelbarrow designs. To support the wheelbarrow in equilibrium, the man's hands apply a

202. ## physics

Does changing the angle of an incline that you are rolling a ball down change any of these paramaters? Final velocity of the ball, work, initial potential energy, and final kinetic energy?

Multiple-Concept Example 10 provides one model for solving this type of problem. Two wheels have the same mass and radius of 5.0 kg and 0.47 m, respectively. One has (a) the shape of a hoop and the other (b) the shape of a solid disk. The wheels start from

204. ## maths

If Asquare+Bsquare=16 and 2AB=7. Find the possible values of (A-B)

205. ## Maths

4. Calculate average speed of particle which position at time t is given by the function g(t) = t3, on the intervals (a) [2,3]; (b) [2,2.1]; (c) [2,2.0001]; (d) [2, 2 + h] , where h > 0 is arbitrary positive number. Find g′(2).

206. ## Maths

4. Calculate average speed of particle which position at time t is given by the function g(t) = t3, on the intervals (a) [2,3]; (b) [2,2.1]; (c) [2,2.0001]; (d) [2, 2 + h] , where h > 0 is arbitrary positive number. Find g′(2).