Questions Asked on
November 7, 2015

  1. science

    Calculate net force when mass =2000kg, uniform velocity =60kg/hr

    asked by karan
  2. Calculus

    Find the Absolute Maximum and Absolute Minimum of f on (0,3]. f(x)=(x^3-4x^2+7x)/x Multiple choice question I know the minimum is (2,3) but the maximum is either nothing or (0,7) but I can't tell which one

    asked by Henry
  3. Math

    A lorry travels at 50 km/h. Given that the diameter of its wheel is 88 cm,find how many revolutions per minute the wheel is turning. GIve your answer to the nearest whole number.

    asked by Bushra
  4. Calculus

    In a right triangle, the hypotenuse is of fixed length of 15 units, one side is increasing in length by 4 units per second while the third side is decreasing in size. At a certain instant the increasing side is of length 9 units. Find the rate of change of

    asked by Bob
  5. chemistry

    Calculate K at 298 K for the following reactions. NO(g) + 1/2 O2(g)......> NO2(g) Nog 86.60 No2 g 51 o2.... O I got 6.81 x 10^-7........thank you.

    asked by Patrick
  6. chemistry

    Calculate K at 298 K for the following reactions. NO(g) + 1/2 O2(g)......> NO2(g) Nog 86.60 No2 g 51 o2.... O I got 6.81 x 10^-7........thank you.

    asked by Patrick
  7. chemistry

    Calculate K at 298 K for the following reactions. NO(g) + 1/2 O2(g)......> NO2(g) Nog 86.60 No2 g 51 o2.... O I got 6.81 x 10^-7........thank you.

    asked by Patrick
  8. maths

    A box 48 cm by 48 cm by 36 cm high is made of wood .5 cm thick. If the box has no lid, find the volume of wood used in making the box.

    asked by Anonymous
  9. science-chemistry

    The Ksp of mercury(II) hydroxide, Hg(OH)2, is 3.60 × 10-26. Calculate the solubility of this compound in g/L. Gf of H2CO3 = -616.1 KJ/mol Gf of H20 = -237.1 KJ/mol Gf of CO2 = - 394.4 KJ/mol 3.

    asked by rashi
  10. science

    Gf of H2CO3 = -616.1 KJ/mol Gf of H20 = -237.1 KJ/mol Gf of CO2 = - 394.4 KJ/mol 3. A. Carbon dioxide dissolves in water to form carbonic acid. Estimate the thermodynamic equilibrium constant for this reaction using the ΔGf° values shown here. B.

    asked by rashi
  11. science-chemistry

    The free energy generated by ion movement in the cell is used by the cell to do work. Compute the minimum number of millimoles of sodium that would be needed to pump one millimole of calcium ions if the following concentrations were present in the cell.

    asked by rashi
  12. maths

    two sprinters runs the same race of 100m. One runs at a speed of 10m/s and the other runs at the speed of 8m/s. by what time will the first sprinter beat the other sprinter?

    asked by Rocky
  13. math

    what is meanning 1)freadholm operator 2)lyapunov-schmidt

    asked by assma
  14. physics

    the speed of train is reduced from 60km/h at the same time as it travel a distance of 450m if retardation is uniform find how much further it will travel approx befor coming rest?

    asked by tarique
  15. MATH

    Nicole makes a keychain by using yellow, red and green beads. The number of red beads used is more than twice the number of yellow beads by 10, while the number of green beads used is more than one-third the number of yellow beads by 7. It is known that

    asked by FRANCIS
  16. math

    A particle moves along the path y=x^3+3x+1 where units are in centimetres.If the horizontal velocity Vx is constant at 2cm/s,find the magnitude and direction of the velocity of the particle at the point (1,5).

    asked by Candice
  17. English

    1. The storm drove the ship off of its course. ============ Is this sentence grammatical?

    asked by rfvv
  18. English

    1. At the age of nine years old, he became too sick. 2. At the age of nine years, he became too sick. 3. At the age of nine, he became too sick. 4. At nine, he became too sick. 5. At nine years old, he became too sick. 6. At nine years old, he became too

    asked by rfvv
  19. Futa

    If the bearing of a town y from x is 125. Find the bearing of x from y?

    asked by Omolewa
  20. English

    We thought that it was a bear. We were scared. Then, it turned around. It wasn't bear! --------------------- In the last sentence, an exclamation mark was used instead of a full stop. What is the difference between the sentence ending with an exclamation

    asked by rfvv
  21. Algebra

    The variable x in the expression 3+2x is replaced in succession by 1,2,3 and 4. Find the sum of the resulting numbers. Thank you for your time and please help! I am very confused.

    asked by Alana
  22. algebra

    From a point on a straight road, 2 cars are driven in opposite direction. One care at 69 miles per hour and the other at 27 miles per hour. How many hours will they be 480 miles apart?

    asked by andrea
  23. math

    A submarine descends from sea level to the entrance of an underwater cave. The elevation of the entrance is -120 feet. The rate of change in the submarine's elevation is no greater than -12 feet per second. Can the submarine reach the entrance to the cave

    asked by Tim
  24. Spread sheets

    I am looking for a web site to help with my home work on Common balance spread sheets layout.

    asked by Debbie
  25. Maths

    What is minimum value of e^2x+ e^-2x Thx

    asked by celina
  26. excellent success

    the sum of two numbers is 17, the difference between the larger number and three times the smaller is 4, find the numbers!

    asked by prosofyna
  27. math

    the cost of three pencil and one eraser is #22, while the cost of four pencils and three eraser is #42, find the numbers

    asked by prosofyna
  28. math

    A father is now three times as old as his son, twelve years ago he was six times as old as his son. how old are the son and the father?

    asked by prosofyna
  29. economics

    Describe Economic service and types

    asked by prosofyna
  30. Math

    A right-angled triangled has sides (x+10)cm,(x+2)cm and (x+4). find the value of each side of the triangle.

    asked by Odun
  31. physics

    A 22 kg child is riding a playground merry-go-round that makes 40 revolutions in 60 seconds. Determine the magnitude of force (in Newtons) necessary to make the child stay on the merry-go-round if she is 1.25m from its center.

    asked by edson
  32. physics

    A 22 kg child is riding a playground merry-go-round that makes 40 revolutions in 60 seconds. Determine the magnitude of force (in Newtons) necessary to make the child stay on the merry-go-round if she is 1.25m from its center.

    asked by edson
  33. Algebra

    Greg is paid double- time for each hour worked over 45 hours in a week. Last week he worked 53 hours and earned $732. What is his normal hourly rate?

    asked by Antonio
  34. Math

    Sara and Jenny can both do flips in the air. The ratio of the number of flips Sara can do to the number of flips Jenny can do is 3:8. Jenny can do 120 more flips than Sara. If Sara increases the number of her flips by 3 and Jenny decreases the number of

    asked by Katy
  35. Maths

    A closed box in the shape of a cuboid has dimensions x cm, y cm and 5 cm. The volume of the box is 40 cm^3 and the external surface area is 76 cm^2. A) use the information about the volume to find and equation connecting x and y B) use the information

    asked by Anonymous
  36. Business

    A frequency distribution is obtained by A. listing the values in sets of data individually. B. taking the difference between the highest and the lowest value in each set of data. C. summing the values of a set of data and dividing by the number of values

    asked by Debbie
  37. Managerial Economics

    I am completely lost in working this problem. 1. The total operating avenues of a public transportation authority are$100 million while its operating costs are $120 million. The price of a ride is $1, and the price of elasticity of demand has been

    asked by Dee
  38. chemistry

    Given two liters of 0.496M KCl describe how you would use this solution to prepare 250.0 ml of 0.175M KCl.

    asked by julie
  39. St Ann's College (DDL) Enugu

    In A Class Of 60 Students, 30 Offer Physcis And 40 Offer Chemistry, (a)Use Venn Diagram To Represent This Information (b) How Many Students Offer Both Subject

    asked by Ikechukwu
  40. Chemistry- Dr. Bob

    An electron in the n=7 level of the hydrogen atom relaxes to a lower energy level, emitting light of 2166 nm. What is the value of n for the level to which the electron relaxed?

    asked by Anonymous
  41. geometry

    A room is 14 x 21 ft.It needs to be painted.The ceiling is eight above the floor.There are 2 windows in the room, each one is 3 ft by 4 ft. The door is 2.5 ft by 6.5 ft. 1)Find the area of the walls and ceiling to be painted. 2)one gallon of paint covers

    asked by Leanne
  42. Statistics

    A bag contains 5 purple marbles, 7 yellow marbles, and 3 orange marbles. If two marbles are selected from the bag: What is the probability that an orange then a yellow are chosen with replacement?

    asked by Kate
  43. Chemistry- Dr. Bob

    Question 1 Calculate the wavelength (in nm) of the red light emitted by a neon sign with a frequency of 4.74 x 1014 Hz. A) 704 nm B) 158 nm C) 466 nm D) 633 nm E) 142 nm My answer: D.633 nm Question 2 How many photons are contained in a burst of yellow

    asked by Anonymous
  44. English

    "You might not need it. But can you live without it?" What literary device is used in this sentence? Thanks!

    asked by Samer Madieh
  45. Math

    The following rational function describes blood concentration of a certain drug taken via IV over time, find a. the horizontal or oblique asymptotes b. the vertical asymptote c. describe their possible meanings f(x)= x+1/x

    asked by Jay
  46. Finance

    Problem 10-32 Project Evaluation [LO1] Aria Acoustics, Inc. (AAI), projects unit sales for a new seven-octave voice emulation implant as follows: Year Unit Sales 1 86,000 2 99,000 3 113,000 4 108,000 5 89,000 Production of the implants will require

    asked by Thomas
  47. Calculus

    Evaluate the integral. (Remember to use ln(|u|) where appropriate.) cot^3(3x) dx

    asked by Anonymous
  48. math

    Brooke received her bank statement on March 7, showing a balance of $2,668.02. The balance shown in her checkbook was $2,256.20. Deposits in transit amounted to $646.53 and there was a service charge of $7.00. Outstanding checks were $276.69, $380.00,

    asked by Anonymous
  49. math

    June wishes to make a deposit. She has these bills: 41 ones, 7 fives, 3 tens, and 2 twenties. She has 8 nickels, 7 dimes, and 22 quarters. June has checks for $51.25 and $14.75. June wants to receive $50 in cash. What would she enter on the TOTAL line?

    asked by Anonymous
  50. English & Composition

    The prompt to this formal essay I have to write is : How do Thoreau in "Civil Disobedience", Gandhi in "On The Eve of Historic Dandi March", and MLK Junior in "Letter from Birmingham Jail reflect the spirit of optimism?

    asked by Sophia
  51. Math

    The volume of a triangular prism is 12cubic cm .atriangular face has base b and height h. The length of the prism is l. Find possible values for b, h and l. Sketch one possible prism that has an isosceles triangle as its base.

    asked by Jalal
  52. Math

    Play tickets cost $24 for two adults and two children. A child's ticket costs half as much as an adults ticket. Find cost of child's ticket

    asked by Mary
  53. Algebra

    Scatter plots and least square lines. The number of home runs hit by a player. 1990 1991 92 93 94 95 96 97 98 99 39. 22. 42 9. 9. 39 52 58 70 65 Find the equation of the least square line? Y=4.9x+18.5 Find the correlation, r, to the nearest hundredth? 0.68

    asked by dad
  54. Science

    Which process of the carbon cycle is responsible for the release of carbon at the power plant, as shown by the arrow? A. combustion B. photosynthesis C. digestion D. decomposition @Ms.Sue can you check my answer I think the answer is A.

    asked by Ava
  55. English

    Hello. I will highly appreciate some help. Please check the sentences (whether they are natural and grammatically correct): 1) "His life can justifiably be considered exemplary." 2) "I have always acknowledged his intellect and erudition." 3) "He is no

    asked by Nalmi
  56. University of cape coast Ghana

    A man have a fourth of his life a boy, a fifth as a young man and a third as an adult.Then he spent 13 years in his old age.How old was him when he die.

    asked by Aminu
  57. Math

    Drawing a least one king when you draw a card from a standard deck 8 times (replacing the card each time you draw, so there are always 52 cards in the deck) P(at least one king in 8 attempts)= [P(1 king + 2 kings + 3 kings + 4 kings]^8 = 1/52 + 2/52 + 3/52

    asked by Ann
  58. general physics question

    Whenever I read my science textbooks, they always say that "electrons were fired" or "stream of electrons were fired to the target" during an experiment my question is, how to they generate a stream of electrons to fire in a line?? sorry if this is a dumb

    asked by Anonymous
  59. English

    Hello again. Dear Ms.Sue, thank you for your answers. I would be very grateful if you helped me again. 1) Do you think it's possible to say "You are a perfect match" (about a married couple,i.e. about two people)? 2) Do you think it's possible to say "I

    asked by Nalmi
  60. chemistry

    Magnesia (MgO(s)) is used for fire brick, crucibles and furnace linings because of its high melting point. It is produced by decomposing magnesite (MgCO3(s)) into at around 1200oC Write a balanced equation for the magensite decomposition being sure to

    asked by Kyson
  61. Chemistry

    how much limestone would be required to change the ph value from 4 to 4.5 in 20000 cubic of water?

    asked by Jerry
  62. Science

    How can you describe the location of magnesium (Mg, atomic number 12) periodic table? A. nonmetal B. metalloid C. group2, period3 D. group3, period 2 @Ms.Sue My answer is C. Can you check my answer Thank you

    asked by Ava
  63. Chemistry

    Styrene is produced by catalytic dehydrogenation of ethyl- benzene at high temperature in the presence of superheated steam. (a) Find ÄH°rxn, ÄG °rxn, and ÄS °rxn, given these data at 298 K: (b) At what temperature is the reaction spontaneous? What

    asked by Dalton
  64. Business math

    Total current assets (CA) $20,000 Accounts receivable (AR) $10,000 Current liabilities (CL) $11,000 Inventory (INV) $4,000 Net sales $30,000 Total assets $25,000 Net income $5,000 Calculate average day’s collection. A. 12 days C. 1.2 years B. 120 days D.

    asked by Debbie
  65. US history

    although the two candidates differed in their political ideologies the election of 1840 remained relatively civil and polite. True or false

    asked by sk
  66. Physics

    The propeller blades of an airplane are 2.4 m long. The plane is getting ready for takeoff, and the propeller starts turning from rest at a constant angular acceleration. The propeller blades go through two revolutions between the fifth and the seventh

    asked by John
  67. Chemistry

    In the process of respiration, glucose is oxidized completely. In fermentation, O2 is absent, and glucose is broken down into Co2 and H2o. Calculate delta g for respiration of 1.00 g of glucose Calculate delta g for fermentation of 1.00 g of glucose. My

    asked by Judith
  68. Organic Chemistry

    Identify the following compound from its IR and proton NMR spectra. C5H6O: IR: 3300 (sharp), 2102, 1634 cm–1 NMR: δ 3.10 (1H, d, J = 2 Hz); δ 3.79 (3H, s); δ 4.52 (1H, doublet of doublets, J = 6 Hz and 2 Hz); δ 6.38 (1H, d, J = 6 Hz)

    asked by Anonymous
  69. math

    A submarine descends from sea level to the entrance of an underwater cave. The elevation of the entrance is -120 feet. The rate of change in the submarine's elevation is no greater than -12 feet per second. Can the submarine reach the entrance to the cave

    asked by Tim
  70. Algebra II

    Write an equation for the following transformation of y = x: a vertical compression by a factor of 1/2. Options: y = -1/2x y = 1/2x y = 2x y = -2x Please help me :)

    asked by Katarina
  71. English

    Individuality, which leads to becoming a social outcast, is expressed specifically within these two films “Edward Scissorhands” and “Charlie and the Chocolate Factory”. Did I use the right punctuations in this sentence

    asked by Anonymous
  72. inequality

    For the problem below, the simple way to get answer would be 10*-12=-120. But how to write it as an Inequality Expression? ---A submarine descends from sea level to the entrance of an underwater cave. The elevation of the entrance is -120 feet. The rate of

    asked by Tim
  73. Organic Chemistry 2

    What is the impurity that must be removed from the benzaldehyde reagent before it can be used in this experiment? this is from are Benzil lab

    asked by John
  74. Organic Chemistry 2

    What is the purpose of adding NaOH ot the reaction? This is the from our Benzil Lab.

    asked by John
  75. saint Teresa's college nsk .subject: mathematics

    find the 10th term of 8/9,_4/3,2

    asked by Raphael
  76. chemistry

    what can be separated into atoms with a chemical reaction.

    asked by hope
  77. Calculus

    Let f(x)= abs of negative abs of x + pi/2 close abs and g(x)= abs of cosx. the wording might be confusing so here is another description of the equation (the "vertical line" that I refer to is the line you draw as you draw the absolute value sign...for

    asked by Anonymous
  78. Organic Chemistry 2

    Compare the IR spectrum of benzoin ) with the IR spectrum of benzil . Explain how the changes in the important peaks are related to the differences between the two structures.

    asked by John
  79. Government

    At what federal level do we have term limits?

    asked by Anonymous
  80. Math-check my answers please :)

    1.Find the length of the hypotenuse of a right triangle with the legs of 9cm and 12cm A.8 B.21 C.15*** D.225 2.The length of a hypotenuse of a right triangle is 13cm. The length of one leg is 5cm. Find the length of the other leg. A.14*** B.144 C.8 D.12

    asked by Cami
  81. physics

    A heart defibrillator passes 10.0 A through a patient’s torso for 5.00 ms in an attempt to restore normal beating. Find the temperature increase caused in the 8.00 kg of affected tissue if all the energy heats up the tissue with a specific heat capacity

    asked by carolyn
  82. chem

    How many moles of H2O are needed to react with 15.0g of CaO forming Ca (OH)2 CaO + H2O --> Ca (OH)2

    asked by brit
  83. English please help!

    I really need you to check these answers for me, I don't know if they're correct, so please check my answers. Cross out any prepositional phrases. Underline the subject once and the verb/verb phrase twice. Reminder: In an imperative sentence(command), the

    asked by Kristopher
  84. Physics

    Lunar astronauts placed a reflector on the Moon’s surface, off which a laser beam is periodically reflected. The distance to the Moon is calculated from the round trip time. The taken for the laser pulse to travel there and back again can be measured to

    asked by carolyn
  85. Math

    Can you please answer me that question in order of operation : 4 to The 3 power Times 2 plus 145 minus 9 . I think the answer is 200. Plz answer

    asked by Saman
  86. Calculus

    suppose a sphere container of radius R=10 cm is fulled to a height of h=2 cm with a magic potion of density p=12g/mm^3. If the empty container weighs 500 g, how much does it weigh after the potion is poured in?

    asked by Anonymous
  87. maths

    If the lawn is 20xY metres and the path around the garden is 2 metres wide, what is the expression for the area of the path?

    asked by me
  88. English

    I really need someone to check my answers so please check. 1.) Hurry down the hall for your next meeting. Phrase: down the hall for your next meeting Verb: hurry Subject:(you)

    asked by Katrina
  89. physics

    Alkaline batteries have the advantage of putting out constant voltage until very nearly the end of their life. How long will an alkaline battery rated at 1 A ⋅ h and 1.58 V keep a 1 W flashlight bulb burning?

    asked by carolyn
  90. Science

    How did the discovery of the electron change the atomic model? A.It disapproved the earlier idea of an invisible atom. B. It confirmed that atoms are very tiny C. it exposed fraudulent conducted by unqualified scientist D. It proved that atoms are easier

    asked by Lea
  91. Government

    How do today’s national conventions differ from those of 50 years ago?

    asked by Anonymous
  92. Math

    Please check to see if I did this correctly. This is a 2 part math problem. 1. Janelle has d dimes and n nickles. Her sister has 5 times as many dimes and 6 times as many nickles as Janelle has. Write the sum of the number of coins they have, and then

    asked by Paul
  93. Math

    Andy set his computer to beep every 6 min. and to chirp every 10 min. His computer just beeped and chirped at the same time. In how many min. will it next make both sounds at the same time?

    asked by Cassidy
  94. English

    I really need someone to check my answers and I don't want to get the answers wrong. Cross out any prepositional phrases. Underline the verb/verb phrase twice. 1.) John walked along the trail during the summer. Subject:John Verb:walked Phrase:along the

    asked by Katrina
  95. physics

    In a shipping company distribution center, an open cart of mass 55.0 kg is rolling to the left at a speed of 5.30 m/s (see the figure (Figure 1) ). You can ignore friction between the cart and the floor. A 18.0 kg package slides down a chute that is

    asked by malakai
  96. History

    Can someone please check my answer? Thank you for any help you can give! 1) During the colonial period, the economic development of the South was most directly dependent on the labor of: a. Factory workers b. Enslaved Africans c. Wheat farmers d. Irish

    asked by Abby
  97. Logarithms

    Solve the following equations for x and check the solution using log. 2^6x-1 = 28 The answer is log56/6log2. Explain each step.

    asked by Bobby
  98. math

    how do you convert miles to feet in the u.s. customary sysyem? multiply by 12 divide by 12 multiply by 5,280 divide by 5,280

    asked by tanya
  99. math

    the distance between new york city and boston is 189.9 miles as the crow flies. how far is it in kilometers? 117.7 kilometers 305.7 kilometers 417.8 kilometers 1,899 kilometers

    asked by tanya
  100. Math

    c-d / d-c I know the answer is -1, but what is the math that I have to show to get to that answer? Thanks!

    asked by Molly
  101. math

    charlene takes the bus to work in the morning, then walks home for lunch, walks back to work, and finally walks home in the evening. The distance one way is 600 meters. How far does she walk each day between home and work? 1.2 kilometers 1.8 kilometers 180

    asked by tanya
  102. Calculus-Reiny

    Yay! Reiny, you read the description of f(x) correctly. Recall the problem posted earlier: Let f(x)= abs of negative abs of x + pi/2 close abs and g(x)= abs of cosx. the wording might be confusing so here is another description of the equation (the

    asked by Anonymous
  103. History

    Can someone please check my answer? 7) When the Articles of the Confederation were written they showed Americans early distrust of: a. The British b. States having too much power c. Strong national government d. The President My Answer~b 14) Starting in

    asked by Abby
  104. physics

    After a constant acceleration of 2.1 m/s/s at 31.7 degrees above the +x-axis is applied by the motors of a boat for 7.75 seconds, the boat is moving at 59.1 m/s at 43 degrees above the +x-axis. What was the initial velocity of the boat? (Give your answer

    asked by EB
  105. physics

    After a constant acceleration of 2.2 m/s/s at 16 degrees above the +x-axis is applied by the motors of a boat for 8 seconds, the boat is moving at 61.45 m/s at 43.5 degrees above the +x-axis. What was the displacement of the boat during this time? (Give

    asked by EB
  106. physics

    An object has an initial velocity of 3.87 m/s at 40.3 degrees. 8.35 seconds later it is moving at 41.1 m/s at an angle of 26.5 degrees. What acceleration caused this change in velocity? (Give your answer in terms of the +x-axis, in degrees)

    asked by EB
  107. physics

    An object has an initial velocity of 2.25 m/s at 57.2 degrees. An acceleration of 133.4 m/s/s at 59.5 degrees is applied. What was the final speed after the object has a displacement of 8.8 m at 33.5 degrees?

    asked by EB
  108. History

    Can someone please check my work? 18) Many wealthy American industrialists of the late 19th century used the theory of Social Darwinism to: a. Support the labor union movement b. Justify monopolistic actions c. Promote legislation establishing a minimum

    asked by Abby
  109. Math

    1.Find the length of the hypotenuse of a right triangle with the legs of 9cm and 12cm A.8 B.21 C.15*** D.225 2.The length of a hypotenuse of a right triangle is 13cm. The length of one leg is 5cm. Find the length of the other leg. A.14 B.144 C.8 D.12***

    asked by Cam
  110. Algebra 1

    For the data in the table, does y vary directly with x? If it does choose an equation for the direct variation. x|y 8|11 16|22 24|33 a. yes; y=2.75x b. yes; y=0.6875x c. yes; y= 1.375x d. no; y does not vary directly with x i think its d, but i'm not sure.

    asked by basketball&batman
  111. English

    How would I rewrite this paragraph using past tense. The jockey drives his pickup truck to the race track. He strides into the stalls where the horses are kept. His head swims with thoughts of the coming race. He springs into the saddle and rides to the

    asked by jennifer
  112. MATH

    1.Find the length of the hypotenuse of a right triangle with the legs of 9cm and 12cm A.8 B.21 C.15*** D.225 2.The length of a hypotenuse of a right triangle is 13cm. The length of one leg is 5cm. Find the length of the other leg. A.14 B.144 C.8 D.12***

    asked by Cami
  113. Math

    Please check my answer. Multiply the reciprocal of 4 1/2 by 8/9. My answer: 9/2 x 8/9 2/9 x 8/9 = 16/81

    asked by Lisa
  114. History

    Does urbanization cause cities to have a growing influence on society

    asked by Steve
  115. Chemistry

    An electron of a hydrogen atom falling from n=3 in the excited state to back to ground state gives off about 12eV. what form the "light" will it give off?

    asked by Giselle
  116. Math Problem

    Please help, is this right. Circle the number closest in value to 8. a. 7.9 b. 8.04 _ c.8.1 (there is a line over the 1) _ d. 7.89 (there is a line over the 9) I selected b: 8.04

    asked by Stan
  117. Math

    If there are 10 more boys than girls,how many are girls and how many are boys? (I think out of 28)

    asked by Stephanie
  118. statistic

    2. High density lipoprotein (HDL) in healthy males follows a normal distribution with a mean of 50 and a standard deviation of 8. c)What is the 99th percentile of HDL in healthy males? d)If we consider samples of 10 patients, what is the 90th percentile of

    asked by mary
  119. chemistry

    name three characteristics of nonmetals

    asked by tanya
  120. math

    x+y=13 x-y=3 x2+y2= 2(x2+y2)= x2-y2-xy=-1

    asked by taher
  121. Percents (Math)

    Need help, please. What percent of 30 is 2 1/2?

    asked by Toni
  122. Math extra credit

    To find the next address: If the owner imported 100 square feet of marble to decorate the façade of the house and 13 square feet of scrap was left when construction was completed, how much marble was used? Write and solve an equation To find the next

    asked by Mariana
  123. math

    the mass of a bag of flour is 7 kg 500 g joyce repacks the flour into 12 small pack of flour? (1 kg = 1,000 g)

    asked by odell
  124. english

    It is always ___ who pays the bill. he her me us would it be he?

    asked by Sara
  125. Calculus

    Consider a sphere container with radius R. 1. Suppose it is filled to height h, below halfway, with water. Find the volume of the water. 2. What is the proportion of the sphere's total volume taken up by the water filled as described in problem #1? 3.

    asked by Anonymous
  126. madedela comprehensive

    Time taken by light ti travel 1 meter is roughly 3x10 negative 8 power seconds

    asked by mc pacua