# Questions Asked onOctober 16, 2013

1. ## math

Which comparison sentence best represents the equation? 6x7=42 7 is 6 times as many as 42. 6 is 7 times as many as 42 or 42 is 6 times as many as 7.

2. ## Physics

A truck travels due east for a distance of 1.7 km, turns around and goes due west for 7.1 km, and finally turns around again and travels 3.5 km due east. What is the total distance that the truck travels? What are the magnitude and direction of the truck's

3. ## chemistry

Exactly 10 mL of water at 25°C was added to a hot iron skillet. All of the water was converted into steam at 100°C. If the mass of the pan was 1.20 kg and the molar heat capacity of iron is 25.19 J/mol∙°C, what was the temperature change of the

4. ## CHEMISTRY..

1. Will a precipitate form if solutions of potassium sulfate and barium nitrate are combined? If so, write the net ionic equation for the reaction. 2. Will a precipitate form if solutions of potassium nitrate and magnesium sulfate are combined? If so,

5. ## Chem

Copper(II) fluoride contains 37.42% F by mass. Use this % to calculate the mass of fluorine in grams contained 28.5 g of copper (ii) fluoride

6. ## General chemistry

Many portable gas heaters and grills use propane, C3H8(g). Using enthalpies of formation, calculate the quantity of heat produced when 16.0g of propane is completely combusted in air under standard conditions. Assume that liquid water is forming.

7. ## Calculus Practice Problems

A filter filled with liquid is in the shape of a vertex-down cone with a height of 12 inches and a diameter of 18 inches at its open (upper) end. If the liquid drips out the bottom of the filter at the constant rate of 3 cubic inches per second, how fast

8. ## Chemistry

In the equation N2 + 2 O2 → 2 NO2, 14 g of nitrogen can produce how many grams of nitrogen dioxide?

9. ## math

1. Eliza Savage received a statement from her bank showing a checking account balance of \$324.18 as of January 18. Her own checkbook shows a balance of \$487.38 as of January 29. The bank returned all of the cancelled checks but three. The amounts of these

10. ## Accounting

The following unadjusted trial balance is prepared at fiscal year-end for Nelson Company. NELSON COMPANY Unadjusted Trial Balance January 31, 2013 Debit Credit Cash \$ 26,150 Merchandise inventory 14,500 Store supplies 5,000 Prepaid insurance 2,100 Store

11. ## Math

An employee working at an electronics store earned \$3582 for working 3 months during the summer. What did the employee earn for the first two months? I got \$2388 I used a proportion and got 3582/3=x/2 solve for x then i divided 2388/3 and got my answer

12. ## Calculus Homework

You are blowing air into a spherical balloon at a rate of 7 cubic inches per second. The goal of this problem is to answer the following question: What is the rate of change of the surface area of the balloon at time t= 1 second, given that the balloon has

13. ## Chemistry

Vitamin K is involved in normal blood clotting. When 2.40 g of vitamin K is dissolved in 25.0 g of camphor, the freezing point of the solution is lowered by 8.05 °C. The freezing point and Kf constant for camphor can be found here. Calculate the molar

14. ## Math

1. The US Senate is composed of 2 senators from each of the 50 states. For a treaty to be ratified, at least two-thirds of the senators present must approve the treaty. Suppose all senators are present and 48 of them have voted in favor of a treaty. What

15. ## math

1. Eliza Savage received a statement from her bank showing a checking account balance of \$324.18 as of January 18. Her own checkbook shows a balance of \$487.38 as of January 29. The bank returned all of the cancelled checks but three. The amounts of these

16. ## Physics

A +30 µC point charge is placed 32 cm from an identical +30 µC charge. How much work would be required to move a +0.45 µC test charge from a point midway between them to a point 11 cm closer to either of the charges?

17. ## chemistry

Consider a mixture of , albumin solution, and starch solutions in a dialyzing bag. The dialyzing bag is then immersed in distilled water. Which of the following actions should be taken to remove the most salt from the mixture? Leave the dialyzing bag in

18. ## statistics

When Trevor and Brian play ping pong, the probability that Trevor will win is 0.6. If Trevor and Brian play two games of ping pong, find the probability that Trevor wins the first game and Brian wins the second. Assume games are independent. Give your

19. ## Math

I am part of a whole. I am less than one-half but greater than four tenths. I am a decimal with the digit 2 in my hundredths place. What number am I?

20. ## Math

In a shipment of 400 parts 14 are found to be defective how many defective parts should be expected in a shipment of 1000? 125

21. ## PHYSICS

An automobile travels 30 km due east on a level road . It then turns due north at an intersection and travels 40km before stopping. What is the the resultant displacement of the car?

22. ## chemistry

Exactly 10 mL of water at 25°C was added to a hot iron skillet. All of the water was converted into steam at 100°C. If the mass of the pan was 1.20 kg and the molar heat capacity of iron is 25.19 J/mol∙°C, what was the temperature change of the

23. ## Physics

A uniform plank of length 5.0 m and weight 225 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 471 N walk on the overhanging part of the plank before

24. ## ET3034TUx Solar Energy

The width of the space charge region at a p-n junction is reduced by applying a voltage bias over the p-n junction. What is the correct statement on both the bias voltage and the p-n junction? a)The voltage is a forward bias and the diffusion of the

25. ## Math

Hurricane Kathrina dropped about 14 inches of rain over a 48 hour period. How much rain is this per hour? (round your answer to the nearest tenth) I got 7 so I round it? I did 14/48=x/24 solve for x Then divided 336/48

26. ## Science

What can scientists learn from the rate at which radioactive elements decay? A. a rock's absolute age* B. the relative age of rock layers C. where one soil horizon ends and the next begins D. the difference between molds and casts. After six half-lives,

27. ## Math

If a trip between work and home takes 15 minutes each way how much till will be spent in a 5 day work week traveling back and forth to work? (assume that at no point does the employee have to go home and come back within the same day) Would the proportion

28. ## Science

How does dna determine a trait such as eye color

29. ## Physics

A train is moving parallel and adjacent to a highway with a constant speed of 27 m/s. Ini- tially a car is 60 m behind the train, traveling in the same direction as the train at 41 m/s and accelerating at 5 m/s2. What is the speed of the car just as it

30. ## physics

Three guns are aimed at the center of a circle,and each fires a bullet simultaneously. The directions in which they fire are 120 degrees apart. Two of the bullets have the same mass of 4.50*10^-3 kg and the same speed of 324 m/s. The other bullet has an

31. ## statistics

According to the Current Population Survey of the Census Bureau, 67% of children live with both parents, 23% live with their mother only, and 5% live with their father only. The rest live with neither parent. If we choose a child at random, what is the

Point A lies in plane B. How many lines can be drawn perpendicular to plane B through point A? 1) one 2) two 3) zero 4) infinite

33. ## chemistry

Exactly 10 mL of water at 25°C was added to a hot iron skillet. All of the water was converted into steam at 100°C. If the mass of the pan was 1.20 kg and the molar heat capacity of iron is 25.19 J/mol∙°C, what was the temperature change of the

34. ## Science

What can scientists learn from the rate at which radioactive elements decay? A. a rock's absolute age* B. the relative age of rock layers C. where one soil horizon ends and the next begins D. the difference between molds and casts. After six half-lives,

35. ## math

mindy picked 4 times as many daisies as tulips for a flower bouduet. she picked a total a 20 flowers. how many more daisies than tulips did she pick

36. ## MATH

Li-Hua wants to create a triangular fame. She has two pieces of wood, which are 6 inches long and 9 inches long, to use for two sides of the triangle. Which of the following CANNOT be the lenth of the third frame and why? a) 4 inches b) 6 inches c) 13

37. ## Physical Science

5. What reactions occurs when a solution of hydrochloric acid, HCl, is mixed with a solution of calcium hydroxide, Ca(OH)2? (A) Cl + Ca(OH) --> HCa + Cl(OH)2 (B) HCl + Ca(OH)2 --> H(OH)2 + CaCl (C) 2HCl + Ca(OH)2 --> 2H2O + CaCl2 (D) 2HCl + Ca(OH)2 -->

38. ## Math estimating quotients

53 divided by 3. The answer is about 18. However, I am unsure of what two numbers to multiply between.

39. ## Chemistry

The ΔHvap of a certain compound is 30.22 kJ·mol–1 and its ΔSvap is 60.63 J·mol–1·K–1. What it the boiling point of this compound?

40. ## geomety

pqr is a right triangle. If RQ = 8, what is PQ?

41. ## Physics

A child pulls a wagon along level ground. The handle with which she pulls the wagon makes an angle of 20.0 degrees with the ground as the child pulls with a force of 78.0 Newton. What are the components of the force. Pls pls pls pls help me answer this and

42. ## Math

is -1.59 written as a rational number in a/b form - is it -1 59/100??

43. ## physics

A skier of mass 40.6 kg comes down a slope of constant angle 30◦ with the horizontal. What is the force on the skier parallel to the slope? Neglect friction. The acceleration of gravity is 9.8 m/s 2

44. ## Chemisty

When alkali metals are heated with hydrogen they form--------hydrides

45. ## physics

In the figure here, a box of Cheerios (mass mC = 1.4 kg) and a box of Wheaties (mass mW = 3.3 kg) are accelerated across a horizontal surface by a horizontal force applied to the Cheerios box. The magnitude of the frictional force on the Cheerios box is

46. ## GEOMETRY

parallelogram with a side of 40in a base of 36in and a height of 33in. WHAT IS THE AREA?

47. ## Math (check my work please?)

A baseball player has 34 hits in 102 times at bat. Another baseball player has 24 hits in 96 times at bat. Write each player's batting average. Here's what I did: 34/102 = BP #1 24/96 = BP #2 34/102 = 1/3 24/96 = 1/4 1/3 --> 4/12 1/4 --> 3/12 4/12 + 3/12 =

asked by Teresa Perri
48. ## Math

1. Carol spends 17 hours in a 2 week period practicing her culniary skills. How many hours does she practice in 5 weeks? 42.5 hours

49. ## grammar

they decided that the hedge needed a trim. what is the part of speech of trim in this sentence

50. ## Calculus Practice Problems

A boat is pulled into a dock by a rope attached to the bow (front end) of the boat and passing through a pulley on the dock that is 4 m higher than the bow of the boat. If the rope is pulled in at a rate of 3 m/s, at what speed is the boat approaching the

51. ## Physics

A person pulls a rake with 152 Newton of force along the handle. The angle between the handle and the ground is 35.0 degrees. Determine the magnitudes of the horizontal and vertical components of this force.

52. ## Physics

An aircraft has a cruising speed of 100 m/s On a particular day, a wind is blowing from the west at 75.0 m/s If the plane is pointed due north, what would be the magnitude and direction of the velocity relative to the ground? If the pilot wishes to have a

53. ## Physics

VERTICAL SPRING A spring of negligible mass, spring constant k = 89 N/m, and natural length l = 1.4 m is hanging vertically. This is shown in the left figure below where the spring is neither stretched nor compressed. In the central figure, a block of mass

54. ## MATH

Oscar is giving his mother a new acquarium in the shape of a rectuangular prism. He is going to wrap it in colorful wrapping paper. He know that he needs exactly 2,948 square inches of paper to wrap the aquarium. If the acuqarium is 40 inches long and 18

55. ## Physics

Find the magnitude and direction of the equilibrant force for these two concurrent forces: 13.5 N, E and 32.0 N, N. Pls HELP me answer this. Thank u very much.

56. ## Math

The ratio of men to wmen at a class is 6 to 5. How many women students are there if there are 3600 men? 3000

57. ## Physics

A car starts from rest on a curve with a radius of 150m and tangential acceleration of 1.5m/s2 . Through what angle will the car have traveled when the magnitude of its total acceleration is 2.6m/s2 ?

58. ## chemistry

calculate the mass/volume percent of a NaCl solution in which 127g of NaCl is dissolved in enough water to give a total volume of 2.69L.

59. ## ET3034TUx Solar Energy

The current density of an ideal p-n junction under illumination can be described by: J(V)=Jph−J0(eqVkT−1) where Jph is the photo-current density, J0 the saturation-current density, q the elementary charge, V the voltage, k the Boltzmann's constant, and

60. ## chemistry

What is the final volume in milliliters when 0.700L of a 46.9% (m/v) solution is diluted to 20.1% (m/v)?

61. ## Math

Point A lies in plane B. How many lines can be drawn perpendicular to plane B through point A?

62. ## Math word problem

claudia went on a skydiving adventure. she jumped when the plane was at an altitude of 10,000 feet and landed safely on the gound at sea level. whhich integer best represent claudia's elevation in feet when she landed? a. -10,000 b. 0 c. 5,000 d. 10,000

63. ## Anna

What would be the temperature of 50 g of 20°C water mixed with 80 g of 40°C water?

asked by Jenna V
64. ## Chemistry

If the molar concentration of sodium ions is 0.44 M, then the concentration of sodium sulfate is 0.88 M True or False

65. ## physics

A rocket moves upward, starting from rest with an acceleration of 28.1 m/s2 for 4.76 s. It runs out of fuel at the end of the 4.76 s but does not stop. How high does it rise above the ground?

66. ## physics

When a 58 gram tennis ball is served, it accelerates from rest to a speed of 45 m/s. The impact with the racket gives the ball a constant acceleration over a distance of 44 cm. What is the magnitude of the net force acting on the ball?

67. ## statistics

It has been reported that 86% of federal government employees use email. If a sample of 175 federal government employees is selected, find the mean, varience, and standard deviation of the number who use email.

68. ## Math

Marlon has 4 cards, lisa has 4 cards and sam has 3 cards. Can you write a multiplication sentence to find how many card they have in all? Explain

Please don't provide any links. We are doing a project where we pick a sports team and we must calculate the revenue and salaries of the players. Then we are asked to explain how a sports team can possibly lose money. Now, I have all of that but I am stuck

70. ## math

A classroom bulletin board is 7ft by 4ft,if there is a picure of a student every 6 inches along the edge including 1 in each corner,how many pictures are on the bulletin board?

71. ## chemistry

Given 50 ml of concentrated nitric acid.The density of the concentrated acid is 1.42 g/ml and is 70% HNO3 by wt. Calc. the molality of the conc. acid.

72. ## Math explanation

Explain how 0.5 and 0.05 are NOT equivalent

73. ## math

what is the unit rate for 40.8 gallons in 8 containers?

74. ## Chemistry

A gaseous mixture contains 413.0 Torr of H2(g), 372.1 Torr of N2(g), and 70.1 Torr of Ar(g). Calculate the mole fraction, X, of each of these gases.

75. ## MATH Word Problem

A pedestal for a statue is in the shape of a hexagon formed by a square and two congruent triangles, with the dimensions 7 ft length and 4 feet height. What is the area of the top surface of this pedestal? a) 19 sq. ft b) 22 sq ft c) 25 sq. ft d) 28 sq, ft

76. ## English

Benjamin Franklin was both a statesman and an inventor. How do i make this sentence parallel

77. ## physics

A mass M of 2.95 kg is attached to the end of a string whose length is 0.420 m. The mass slides without friction on a horizontal surface as indicated in the diagram. If the string can withstand a maximum tension of 127.5 N, what is the maximum tangential

78. ## Language Homophones

What is the homophone for racecourse.?

79. ## calculus

The question is: tan(arcsinx)= I know that inverse of sin is 1/sqrt(1-x^2) however this question still confuses me. The outcome is x/sqrt(1-x^2), how did the tan create the additional x ?

80. ## calc

The cost of producing d hundred plastic toy dinosaurs per day in a small company is C(d) = 120 + 30d + 1 8d4 dollars. This company is currently producing 500 di- nosaurs each day. Using calculus, estimate how much the company should change the production

81. ## Physics

An 8.3 uF and a 2.9 uF capacitor are connected in series across a 24 V battery. What voltage is required to charge a parallel combination of the two capacitors to the same total energy?

82. ## Algebra 1, Math

What is the difference between continuous and discrete?

83. ## Chemistry

A solution is made by dissolving 0.698 mol of nonelectrolyte solute in 777 g of benzene. Calculate the freezing point and boiling point of the solution

84. ## math

in a motel the room tax is \$4.50 and the room rate is \$75. write the tax asa percent of the room

85. ## chemistry

calculate the mass percent of a solution that is prepared by adding 62.3g of NaOH to 343g of H2O?

86. ## chemistry

Given 50 ml of concentrated nitric acid.The density of the concentrated acid is 1.42 g/ml and is 70% HNO3 by wt. Calc. the molality of the conc. acid.

87. ## Physics

An 8.3 uF and a 2.9 uF capacitor are connected in series across a 24 V battery. What voltage is required to charge a parallel combination of the two capacitors to the same total energy?

88. ## Homework Help Calculus

Find the linear approximation L(x)of the function f(x)=cos(pi/(6)x) at the point x=1 and use it to estimate the value of cos(13pi/72). Here's what I did so far: L(x)=sqrt(3)/2-1/12pi(x-1)+0((x-1)^2) How do I find cos(13pi/72)

89. ## Math

Darren is trying to improve his typing speed. On his first practice assignment, he types. 198 words in 6 minutes. On his second assignment, he types 248 words in 8 minutes. Did his speed improve? Tell how you know.

90. ## Math

The price of a stock decreased \$2 per day for four consecutive days. What was the total over the four day period?

91. ## phy

The velocity of a 2.5 kg block sliding down a frictionless inclined plane is found to be 1.25 m/s. 1.00 s later, it has a velocity of 4.15 m/s. What is the angle of the plane with respect to the horizontal (in degrees)?

92. ## Chemistry

A gaseous mixture contains 413.0 Torr of H2(g), 372.1 Torr of N2(g), and 70.1 Torr of Ar(g). Calculate the mole fraction, X, of each of these gases.

93. ## English

At the fair, not only can I eat tasty food, but I can also see awesome fireworks. How do i make this a parallel structure using linking words?

94. ## CHEMISTRY..

*What are the products after a single replacement rxn? *Determine the spectator ion(s) and the net ionic equation. F2(g) + AlBr3(aq)--->? After single replacement....Br2 is a liquid, not a solid so ppt will not form..hence, there is no reaction?

95. ## math

COMPLETE ratio table It takes 2 cups of cranberry juice for every for every 3 cups ginger ale Cranberry juice Ginger ale 2 ? ? 6 6 ? ? 12

96. ## Chemistry

the density of Fe2O3 is 5.343g cc. What is the mass volume concentration of iron in Fe2O3

97. ## Poetry

What does the metaphor,seas of blood mean?

98. ## Physics pls anyone can help me? its urgent

When the sun is in the zenith and the sky is perfectly clear, the solar power we receive on the surface of the earth is roughly 1 kW per square meter (on a horizontal surface that is normal to the direction of the sun). Calculate the average solar power

99. ## Math

In the typing world, 80 words per minute is considered acceptable. How many words per 30 minutes is this? 8

100. ## Statistics

What is the mean and standard deviation of 63.7%? What is the mean and standard deviation of 61.4%? Using the 68-95-99.7 rule, describe the sampling distribution of 63.7% Using the 68-95-99.7 rule, describe the sampling distribution of 61.4%? Please help I

101. ## calculus

The question is: tan(arcsinx)= I know that inverse of sin is 1/sqrt(1-x^2) however this question still confuses me. The outcome is x/sqrt(1-x^2), how did the tan create the additional x ?

102. ## math

the cost of 5 similar digital cameras and 3 similar camaras is 3213.00\$. each video camera cost 4 times as much as each digital camera. john buys a digital camera and a video camera. how much does he pay

When is the best time to read review the discussion questions? A. Immediately after you have finished all of the reading. B. After you write your notes. C. Before you begin any detailed reading. D. At least 1 hour after your detailed reading.

104. ## Chemisry

If 125 mL of a 6.00 M KNO3 solution is diluted with 100.0 mL of water, the molarity of the resulting solution would be

105. ## Math Question

This problem on my homework is asking me to write each fraction as a decimal, and round to three decimal places. The fraction was 17/16. I got 1.0625 for the decimal. What does it mean to round it to three decimal places, and how do I do that?

106. ## math

the weight of 3 different pencils is 50g,30g and 40g.Work out their average weight.

107. ## Physics

A man of mass 70 kg is in free fall in the air. He reaches a terminal speed of about v_term = 54 m/s. (Note that v_term >> v_crit and we are in the pressure dominated regime where F_fric is directly propotional to v^2 ; we have g = 9.8 m/s ) What is the

108. ## finite math

Isaac, Jennifer, and Karl are making their airline reservations to fly to Kennedy airport (NYC) from Indianapolis on the day after the final exam. All three want to fly on UV Air. UV Air has morning flights from Indianapolis to Kennedy at 7:30 am, 8:15 am,

109. ## chemistry -lab

what would be the percent yield if 2.2 grams of aspirin is formed?

110. ## MATH WORD PROB Function

To rent a conoe, you pay a fee of \$25 and an hourly rate of \$5. Express the total cost of a rental as a function of hours, h. Then use the !@#\$%^&tion to dertmine the total cost to rent a conoe for 8 hours. The equation should be written in slope intercept

111. ## Chemistry

3.50 g of NH4Cl is added to 18.8 g of water. Calculate the molality of the solution.

112. ## chemistry

A solution is labeled 85.6 g HCl per 480 g of water,calculate the molality and % HCl by wt.

113. ## math

mary wanted to buy a shirt that was originally \$40 but is now 20% off. How much would mary save if she buys the shirt? is it \$2.00

114. ## cor biology

Substance X has a molar extinction coefficient (E) of 4725 l.mol-1. How many moles of X are needed to produce an absorbance of 1.0 in a 1 ml cuvette?

115. ## algebra 2

Solve system of equations.Describe each step if your solution. W+X+Y+Z=2 2W-X+2y-Z=1 -W+2x-y+2z=-2 3w+x+y-Z=5 Please help I only know how to do this with 3 equations.

116. ## math

the original bill was \$27.20. You left \$ 3.81 extra for the tip. What percentage of the original bill was he tip?

117. ## physics

Particle 1 with a momentum of 126.2 kg·m/s along the x axis, strikes particle 2, which is initially motionless. After the collision, particle 1 has an x component of momentum, p1x = 82.0 kg·m/s and a y component, p1y = 46.8 kg·m/s. What are p2x and p2y,

118. ## AP Chem

How many liters of H2 have the same number of molecules as 1.00 liters of 02? ( At the same temperature and pressure)

119. ## marie g davis

bus route also throgh balmorhea which is 1/3 of the way from el paso to san antonio abaut how does it take the bu s to get to balmorhea. you can healp this homework is may son I do now undertand.

120. ## math

if a 1/2 kilogram of beef costs £1.60 work out the coast of 3/4 of a kilogram.

121. ## Chemistry

If an ideal gas has a pressure of 5.63 × 105 Pa, a temperature of 401 K, and a volume of 0.0313 m3, how many moles of gas are in the sample?

122. ## physics

8.01 homework. I have difficulty with question no. 2. all my equations do not work-Rough Surfaces. Also, the period of oscillation got part a the rest is confusing and my answers do not check out. I thought this was a very difficult assignment to say the

123. ## 4th grade math

kareem put 5 carrot sticks on each of 8 plates. he had 4 carrot sticks left over. how many carrot sticks does he have

124. ## 4th grade math

brendan has 75 stamps in his collection. he puts 8 stamps on each page in his album. how many more stamps does he need to fill 10 pages with no stamps left over

125. ## Math Critical Thinking

Isaiah changes his bike tire every 4 months. How many tires will he have changed in 2 years?

126. ## Math

If 3 pounds of apples cost \$0.90, how much will 10 pounds cost? \$3.00 You find that your watch gains 2 minutes in 6 hours. How much will it gain in 3 days? 24 minutes

127. ## chem

Pu-238 is radioactive by alpha-decay (half-life 87.7 y). Each decay releases 5.6 MeV of energy. Pu-238 is sometimes used to power space probes. If all the decay energy can be converted to electric power, what mass of Pu-238 would be required to power a 22

128. ## English

1. You have to sit down with each other. 2. You have to endure each other. 3. You have to be patient with each other. (Does #1 mean #2 or #3?)

A coffin is given an initial speed of 4.4 m/s up the 17.8º inclined plane with a coefficient of kinetic friction of 0.4. How far up the plane will it go?

130. ## algebra functions

construct two composite functions, Evaluate each composite function for x=2. i do not fully understand functions yet can someone explain and show me what to do step by step f(x)=x+1 g(x)=x-2

131. ## physics

What maximum height will a 318.3 m driver each if it is launched at an angle of 17.0 tothe ground? The acceleration due to gravityis 9.81 m/s2.

132. ## calculus

f(x) = ln(ln(lnx)) has the domain of (e, infinity). I am not sure how this occurs however. I know in the case of ln x, x must be greater than 0. However where does e come from. e is the base of log in the case of ln, but something is just not clicking for

133. ## chemistry

An electron falls from the conduction band of silicon (Si) to the valence band. The band gap of Si is 1.1 eV. What is the wavelength of the photon emitted by this process? Give your answer in nm.

134. ## English

I would for you to overlook my narrative essay, for corrections and your advice. The essay is not finished, but would like to know am I on the right path. A Painful Moment It was the summer of 1998; I was twenty years old celebrating the 4th of July with

135. ## chemistry

A solution is labeled 85.6 g HCl per 480 g of water,calculate the molality and % HCl by wt.

136. ## calculus

lim t-> -infinity for sqrt(4t^2-5t-1)/(2t-3) I get infinity or -infinity, but the real answer is -1. How does this occur?

137. ## chemistry

Why you did not use the 50 ml given in the problem instead you use 1000?

138. ## Science

What part of the circulatory system moves the blood through your body?

139. ## math

A road is 53 km 500 m long. Out of this, 15 km 800 m is closed for repairing. How much of the road is open to traffic?

140. ## Science

A coffin is given an initial speed of 4.4 m/s up the 17.8º inclined plane with a coefficient of kinetic friction of 0.4. How far up the plane will it go?

141. ## math

Muhammad Chabali earns \$13,600 per year. He is paid 12 times per year and claims 2 exemptions. His city and state combined tax him at a rate of 10%. How much tax is withheld per pay period?

asked by jared jones
142. ## Homework Help Calculus

Find the linear approximation L(x) to the function f(x)=2x^(-2) at the point, x=4 and use it to estimate the value of f(39/10). I already found L(x: L(x):(1/8)-(x-4)/16+0((x-4)^2) How do you find f(39/10)?

143. ## math

How do I solve ? Adam bought a basketball that was on sale for 25% less than the original price.The original price was \$4 more than the sale price. What was the original Price?

144. ## Help history

World civilization 1 and 2 Which one s more interesting please help I have to chose one

145. ## math

I need help solving this problem; 7-3(2t-5)+4t=-18

146. ## Biology

The lack of nutrients and molecular building blocks, cells not secreteing materials normally and improper ion balance are results of which organelle not functioning properly

147. ## math

make one hundred and forty 6 times as large.

148. ## chemistry

Why you did not use the 50 ml given in the problem instead you use 1000?

149. ## Math

What is 14 R5 in decimals?

150. ## pigskin geography

determine the cardinal direction the buffalo bills will fly in route to their game against the miami dolphins on october 20

151. ## language

is this sentence making sense 'you meddling kids are never to trespass in my yard" im writing an essay and wondering if this sentence mak es sense

152. ## Math

What is 14 r5 in decimals?

153. ## math

find the product to (2x+4y)(8x+3y)

154. ## Math- Urgent

15=y+24 What does y equal? Please show all work.

155. ## Physics

if the water in the river moves downstream at 4mi/hr heading the boat straight across the river, what direction will the boat move relative to the shore? i don't want the answer... i want someone to explain. i wanna learn

156. ## health

Whats the largest bone in your body?

157. ## math

1. find the equation of the tangent line at x=1 to y=f(x) where f(x)=(3x^2)/(5x^2+7x) Can someone help walk me through the steps of this problem. Do I start with finding the derivative of the function using the quotient rule?

158. ## Algebra 1

The sum of three consecutive integers is 48.what is the set of the three consecutive integers that fits this situation

159. ## math

Suppose a number is chosen at random from the sample space {3, 4, 5, 6, 7}. Find the probability as a fraction and percent. Round the percent to the nearest tenth. Please show your work. P(less than 3)

160. ## school of engineering

A train of mass 200 tonne travelling at 140 km/h applies the brakes fiercely , so that the brakes lock and the wheels slides along the rails.it stops sliding 1000m. calculate. 1. The acceleration. 2. The longitudinal force on the rail. 3. The coefficient

161. ## math

ANGLE A AND B ARE SUPPLEMENTARY. THE MEASURE OF ANGLE A IS 5X+12 AND THE MEASURE OF ANGLE B IS 6X-30. FIND THE MEASURMENT OF EACH.

162. ## school of engineering

A train of mass 200 tonne travelling at 140 km/hour applies the brakes fiercely, so that the brakes lock and the wheels slide along the rails. It stops after sliding 1000m. Calculate: (i) The acceleration, (ii) The longitudinal force on the rails, (iii)

163. ## calc

On January 1, 2013, at a price of x dollars, the demand for a certain product was D(x) = 300 x2 + 10px thousand units per month. t months after January 1, 2013, it is estimated that the price of the product will be x(t) = 3t4/3 +16 dollars. At what rate is

164. ## Trigonometry - Proof

Prove that cot x + tan x = csc x * sec x whenever both sides are defined. I tried rewriting all sides in terms of sin x but it got all complicated and I can't make head or tail of it. Could someone assist me? Is it all just a pound-out algebra problem in

165. ## English

My ears buzz, but I think I hear him shout, “Run, son! Get up and run!” Uncertain, I scramble and gape at Baba. Sweat streams down his face, and he holds a hand over his chest. Is he having a heart attack? He can’t be. His eyes are shining. I can see

166. ## chemistry

Covert 22.3 grams of C6H12O6 to molecules

167. ## math

0.81 divided 9

168. ## pigskin geography week 7 october 20

which team will make a transcontinental flight to play their game? ___________

169. ## pre-alg

I need help to create an addition word problem and a subtraction word problem using fractions. I need to show how to find the solution to each problem. Once I find the solutions to my problems, I have to rewrite the solutions as either a terminating or

170. ## 10th us history

Why did the British fight with the Indians?

171. ## math

In the figure, p || q and r is the transversal. If OA and OB are bisectors of the interior angles, which of these describes angle AOB?

172. ## math

If the marks obtained by students in an examination and the weightage for the different subjects are given in the figure. What is the value of the weighted average? PICK 70 77.3 75 80

173. ## social studies

What led to Neo Indians groups settling in Louisiana ? a) the mild temperatures in the area b) the abundance of water for fishing c) the lack of animals to hunt d) the practice of growing foods seasonally

174. ## math

A persons height is 161 and the persons shadow is 280, and a objects height is 345. Solve by using proportions

175. ## math

Persons height is 165 and the persons shadow is 285. The objects shadow is 345. Solve by using proportions

176. ## Newtons Second Law Physics

If a cart and a string are attached and there is a weight on the end of the string to pull the cart, and both the cart and the weight on the string were the same.. what would I expect acceleration to be using Newton's second law?

177. ## math

1. find the equation of the tangent line at x=1 to y=f(x) where f(x)=(3x^2)/(5x^2+7x) Can someone help walk me through the steps of this problem. Do I start with finding the derivative of the function using the quotient rule?

178. ## math

what percent of 80 is 12

179. ## 6th grade math

From Monday..Can you check the following problems, please? 1. If the ratios for microphones to karaoke machines are all equivalent, how can you find the value of x? table: microphones 3 9 15 36 karoke 1 3 x 12 Ans: x=5 (because divide each ratio by 3) 2

180. ## pigskin geography

name the states that the Chargers will fly over in route to their game in Jacksonville, ____,_____,_____,_____,____,_____,____, ____,____.

181. ## english grammar

We saw the governor and mayors in a meeting. is governor capitalized?

182. ## computers

can someone help me anser this question on installing microsoft--- Describe an experience installing the Microsoft Office Suite software. Note: If the software is already preinstalled, take a look at where the software is installed and list the components

183. ## algebra functions

can someone help me with this and explain it to me step by step so i can try to solve the remaining problems i have I have no idea of what I am supposed to do For each problem, construct two composite functions, . Evaluate each composite function for x=2.

184. ## psychology

I need help answering this question please. What is the relationship between genes, cells, and behavior?

185. ## math

Person's height is 163 and the person's shadow is 290. The objects shadow is 345. Solve by using proportions

186. ## Math- Urgent

1/4 w=13 What does w equal? Please show all work.

187. ## maths

a square piece of tin 31cm and20cm is to be made into a box without top,by cutting a square from each corner and folding up the flaps to form the box.what should be the side of the square to be cut off so that the volume of the box is the maximum possible?

188. ## PSY

I need help answering this question please. What is the relationship between genes, cells, and behavior?

189. ## math

Solve the compound inequality. -3 < 2x - 3 < 5

190. ## pigskin geography week 7 day Oct 20

ascertain which team will lookdown into the grand canyon going to tyheir game. _____________

191. ## computer

what is the least difficult microsoft office component to learn? what is the most difficult?

192. ## math

A mobile shop sold one phone set everyday in the month of February and March of 2013. If each set costs \$102, which of the following is closest to the money the shop earned in these two months? pick an answer that is right :/ (counfuesd) \$5,000 \$6,000

7-13(x-3)

194. ## algebra

3(a+5b)-7/2(2b-a) combine like terms

195. ## Theoretical Calculus

I have too much swag

asked by Ivanna P Budly
196. ## allgebra

1/3(x+5=k) solve for x

197. ## Math

one more - 4.03 as a rational a/b form...is it 4 03/100??

198. ## english

Though not sedking any attention or credit, the volunteer organization was (adulated) for its many (quibbling) activities. are the two vocabulary words correct