William

Most popular questions and responses by William
1. Lo

Suggest how attitude and safety skills may deal with the impact of environmental factors at a personal level.

asked on August 10, 2019
2. math

what are the 5 number combo in 1 to 39

asked on September 8, 2013
3. Art

1. Why would an artist chose to use harmony in a piece of artwork? 2. Perspective drawings will utilize all methods listed here except? 3. To create an image that is not harmonious, an artist could...?

asked on November 3, 2014

Are these correct? I mark my answer with an X. 88. The reason to list all of the preliminary (non-procedural) information in a lesson plan is to be sure have considered each aspect. keep good records for your future needs. be able to communicate clearly

asked on September 25, 2013
5. Chemistry

Gold is alloyed with other metals to increase its hardness in making jewelry. Consider a piece of gold jewelry that weighs 9.85 g and has a colume of 0.675 cm cubed. The jewelry contains only gold and silver, which have densities of 19.3 g/cm cubed and

asked on July 25, 2005
6. English

@ words : 1- curtail 2- devastate 3- digress 4- incentive 5- incorporate 6- indispensable 7- intermittent 8- rigor 9- squander 10-succumb Linda never had to work hard to make good grades in high school. But in college, where the ___(8)___ of course work

asked on October 23, 2014
7. help me physics

The femur is a bone in the leg whose minium cross-sectional area is about 3.60 E-4 m2. A compressional force in excess of 6.90 E4 N will fracture this bone. (a) Find the maximum stress that this bone can withstand. 1 N/m2 (b) What is the strain that exists

asked on November 16, 2010
8. Geometry

In trapezoid $ABCD$, $\overline{AB}$ is parallel to $\overline{CD}$, $AB = 7$ units, and $CD = 10$ units. Segment $EF$ is drawn parallel to $\overline{AB}$ with $E$ lying on $\overline{AD}$ and $F$ lying on $\overline{BC}$. If $BF:FC = 3:4$, what is $EF$?

asked on May 6, 2017
9. Calculus

The table below gives selected values for the function f(x). Use a trapezoidal estimation, with 6 trapezoids to approximate the value of 2∫1 f(x) dx . x 1 1.1 1.3 1.6 1.7 1.8 2.0 f(x) 1 3 5 8 10 11 14

asked on June 28, 2018
10. Chemistry

What mass of H2 gas would be formed when 2.45 g Zn reacts with excess acetic acid? Zn (s) + 2 HC2H3O2 (aq) ------> H2 (g) + Zn (C2H3O2)2(aq)

asked on September 13, 2019
11. Finance

Winnebagel Corp. currently sells 33,000 motor homes per year at $49,500 each, and 13,200 luxury motor coaches per year at$93,500 each. The company wants to introduce a new portable camper to fill out its product line; it hopes to sell 23,100 of these

asked on February 4, 2012
12. History Help?

What role did Stephen Austin play in the settlement of Texas by American colonists? He defeated Santa Anna's army, making it safe for colonists in the region. He convinced American colonists in Texas to declare their independence from Mexico. He received a

asked on December 1, 2014
13. Chemistry

A compound containing 3 atoms of carbon and 8 atoms of hydrogen is combined in a reaction with oxygen molecules. The two end products of this equation are carbon dioxide and water. What element should you look at first in balancing this equation? A. oxygen

asked on November 7, 2009
14. arrays

Rock bands often stack their speakers in an array. One teen band has 24 speakers. They stack them at least 2 high, but no taller than 8 high. What are all the different arrays they can make.

asked on September 20, 2012
15. Trig application

I can't figure this out. A famous golfer tees off on a long, straight 459 yard par 4 and slices his drive 10 degrees to the right of the line from tee to the hole. If the drive went 288 yards, how many yards will the golfer's second shot have to be to

asked on October 29, 2015
16. united staes history

what generalization can you make about the abolition of slavery in the north?

asked on January 15, 2016
17. math

The surface area covered by a rectangular playground is 100 square yards. The width of the playground is 15 yards longer than its length. Using factors, find the length and the width of the playground.

asked on November 28, 2016
18. arrays

One band has fewer than 40 speakers. They stack them in a array exactly 9 high. How many speakers could they have? Explain how you know.

asked on September 20, 2012
19. Math

A, B, C and D are four points on a line such that AB:AC = 7:10, and BD:CD = 9:2. If CD = 9 cm, what is the length, in cm, of AB? A) 49 B) 64 C) 54.25 D)73.25 E)70

asked on October 2, 2018
20. Tirginometry

the expression 4ab(square root of)2b-3a(square root of)18b^3+7ab(square root of)6b is equivalent to... (a)2ab(square root of)6b (b)16ab(square root of)2b (c)-5ab+7ab(square root of)6b (d)-5ab(square root of)2b+7ab(square root of)6b Please help its due

asked on January 1, 2010
21. life orientation

define risky behaviours

asked on August 3, 2019
22. geometry

In triangle $ABC$, $BC = 4$, $AC = 3 \sqrt{2}$, and $\angle C = 45^\circ$. Altitudes $AD$, $BE$, and $CF$ intersect at the orthocenter $H$. Find $AH:HD$. I tried using the pythagorean theorem to find side lengths, algebraically, but I couldn't find

asked on June 23, 2017
23. Chemistry

Which must be the same when comparing 1 mol of oxygen gas, O2, with 1 mol of carbon monoxide gas, CO?

asked on April 14, 2016
24. Calculus

For Questions 1–2, use the differential equation given by dy/dx = xy/3, y > 0. 1. Complete the table of values x -1 -1 -1 0 0 0 1 1 1 y 1 2 3 1 2 3 1 2 3 dy/dx 2. Find the particular solution y = f(x) to the given differential equation with the initial

asked on May 7, 2018
25. Physical Science

An exercise spring has a spring constant of 315 N/m. How much work is required to stretch the spring 30 cm? What force is needed to stretch the spring 30 cm?

asked on December 19, 2012
26. Combining Inequalities

Some treasure has been buried at a point(x,y)on the grid, where x and y are whole numbers. Here are three clues to help you to find the treasure: Clue 1:x>2 Clue 2:x+y0

asked on May 23, 2013
27. Physics

A flea can jump a vertical height h. What is the maximum horizontal distance it can jump? What is the time in the air in both cases?

asked on November 15, 2017
28. calculus

The circumference of a sphere was measured to be 74 cm with a possible error of 0.5 cm. (a) Use differentials to estimate the maximum error in the calculated surface area. (Round your answer to the nearest integer.) cm2 What is the relative error? (Round

asked on March 18, 2012
29. geometry

The endpoints of are A(2, 2) and B(3, 8). is dilated by a scale factor of 3.5 with the origin as the center of dilation to give image . What are the slope (m) and length of ? Use the distance formula to help you decide: .

asked on September 11, 2015
30. Ap Chemistry

Can anyone help me with this question How much NaCl should be added to 0.35 L of a 0.15 M solution of AgNO3 so that it reacts completely with the silver to form AgCl(s)? A. 8.8 g B. 0.0525 g C. 0.89 mg D. 3.07 g

asked on April 12, 2018
31. math

if a polynomial leaves a remainder of 5 when divided by x-3 and a reminder of -7 when divided by x+1, what is the reminder when the polynomial is divided by x^2-2x-3?

asked on March 21, 2019
32. Chemistry

A sample of calcario and other components of the soil was intensely warm. Under these conditions, the calcario undergoes decomposition in calcium oxide and carbon dioxide. CaCO3 (s)-> CaO (s) + CO2 (g) The analysis of 71, 42 g of a sample of limestone

asked on March 28, 2016
33. math

What is the value of the underline digit 6 in 4,600,028

asked on August 31, 2011
34. science

An electric train moving at 20kgh-1 accelerate to a speed of 30kgh-1 in 20s.find the distance travel in meters during the period of acceleration.

asked on September 19, 2019
35. english

who should I choose on call of the wild

asked on July 24, 2019
36. chemistry

how many grams of Na2CO3 must be dissolved into 155 g of water to create a solution with the molality of 8.20 mol/kg?

asked on December 6, 2010

I just cannot figure out if these answers are correct or not. Can you please help me? 78. If the sound system hadn’t failed, last night’s show would have been better. This is a correct sentence using the 1st conditional form. x This is a correct

asked on September 25, 2013

Sheila received a 6.5% commission on a house she sold for $110,400. How much commission did she receive? asked on August 14, 2013 39. chemistry The decomposition of hydrogen iodide if the equation: 2HI (g)--> H2 (g) + I2 (g) The reaction is second order and has a constant rate equal to 1, 6X10^-3 L/mol * s at 700 degrees. If the initial HI concentration in a vessel is 3.4X10 ^-2m. How many minutes asked on September 24, 2017 40. Physics At a city park, a person throws some bread into a duck pond. Two 4.00-kg ducks and a 9.00-kg goose paddle rapidly toward the bread, as shown in our sketch (Intro 1 figure) . If the ducks swim at 1.10 m/s, and the goose swims with a speed of 1.30 m/s, the asked on March 25, 2012 41. chem which of these are strong electrolytes, weak electrolytes and non electrolytes. H2SO4 FeCl2 HClO AgCl I put AgCl as a non H2So4 and HCl as strong FeCl2 as weak but the computer told me my answer is wrong Can some one help please? asked on May 8, 2011 42. Psychology Agatha maintains that people are capable of freely making voluntary choices. Constance is mainly focused on how aggression is caused by genetic inheritance. It seems reasonable to assume that Constance is not much interested in environmental factors asked on May 29, 2019 43. chemistry A 100ml aliquot of a water sample containing Ca(II) and Mg(II) is titrated with 22,74mL of EDTA 0.00998 mol/L at PH 10. Another aliquot of 100ml of the same sample is treated with NaOH to precipitate Mg(OH)2 and is then titrated with PH 13 with 15.86 ML of asked on September 27, 2017 44. arrays One band has 30 speakers. They stack them at least 3 high, but no taller than 6 high. What are all the different arrays they could make? asked on September 20, 2012 45. vocabulary The ----------- definition of gloomy is dismal or depressing. asked on June 18, 2012 46. Chemistry Calculate the heat of reaction (ΔHrxn) for the following reaction: 5O2(g) + 4NH3(g) → 6H2O(g) + 4NO(g) asked on April 13, 2018 47. chemistry The combustion of 0.1619 g benzoic acid increases the temperature of a bomb calorimeter by 2.77°C. Calculate the heat capacity of this calorimeter. (The energy released by combustion of benzoic acid is 26.42 kJ/g.) kJ/°C A 0.1510 g sample of vanillin asked on November 13, 2011 48. chemistry Consider the dissolution of CaCl2. CaCl2(s) Ca2+(aq) + 2 Cl-(aq) ΔH = -81.5 kJ A 13.0 g sample of CaCl2 is dissolved in 134 g of water, with both substances at 25.0°C. Calculate the final temperature of the solution assuming no heat lost to the asked on November 13, 2011 49. geometry Isosceles$\triangle{ABC}$has a right angle at$C$. Point$P$is inside$\triangle{ABC}$, such that$PA=11$,$PB=7$, and$PC=6$. Legs$\overline{AC}$and$\overline{BC}$have length$s=\sqrt{a+b\sqrt{2}}$, where$a$and$b$are positive integers. What is asked on May 28, 2017 50. arrays another band has 30 speakers. they stack them at least 4 high, but no taller than 6 high. what are all the different arrays they could make? asked on September 20, 2012 51. chemistry What is the pH of sodium hydroxide (NaOH) 0.5N asked on June 26, 2018 52. chemistry What volume of 0.307 m naoh must be added to 200.0ml of 0.425m acetic acid (ka = 1.75 x 10-5 ) to produce a buffer of ph = 4.250? asked on July 18, 2018 53. Algebra 1 A salesman starts a trip with 15 gallons of gasoline in his tank. After traveling 220 miles he has 10 gallons of gasoline in his tank. Model this relationship with a linear equation relating the number of miles you can travel to the remaining gallons of asked on July 18, 2017 54. Physics Craziness A big olive (m = 0.40 kg) lies at the origin of an xy coordinate system, and a big Brazil nut (M = 1.2 kg) lies at the point (1.0,2.0) m. At t = 0, a force o = (2.0 + 3.0) N begins to act on the olive, and a force n = (-3.0 - 2.0) N begins to act on the asked on February 28, 2011 55. software development statement that assigns the length of an array named intMovieTimes to intSpan. intPan = (intMovies.intSpan). asked on July 11, 2017 56. Physics A car can slow down at 5.10 m/s2 without skidding when coming to rest on a level road. What would its acceleration be if the road were inclined at 12o uphill? [Ask yourself – What is the same about the situation on the level road and on the incline?] asked on October 4, 2011 57. Physics A space station, in the form of a wheel 197 m in diameter, rotates to provide an “artificial gravity” of 2.5 m/s2 for persons who walk around on the inner wall of the outer rim. The rate of the wheel’s rotation in revolutions per minute that will asked on December 8, 2016 58. Algebra The legs of an isosceles triangle are 0.3 foot less than twice the base. The perimeter of the triangle is 4.9 feet. What is the length of one of the triangle’s legs? asked on May 1, 2015 59. chemistry What is the %v/v concentration of a solution made by adding 25 ml of acetone to 75 ml of water? asked on July 22, 2018 60. math Train #1 leaves san diego at 4pm. train #2 leaves san diego at 6pm.train #2 travels 42 mph faster than train #1. if train # 2 overtakes train #1 at 8pm, what is the speed of each train? asked on September 17, 2015 61. math I am moving to a new house. My old house is 3 kilometers from my new house. How many meters is the old house from the new house? asked on October 30, 2012 62. Physics A 91 kg man lying on a surface of negligible friction shoves a 75 g stone away from himself, giving it a speed of 4.0 m/s. What speed does the man acquire as a result? asked on February 26, 2011 63. chemistry How do you calculate the energy released when 1 mole of ethanol, C2H5OH, is burned? asked on November 7, 2010 64. physics Two disks are mounted (like a merry-go-round) on low-friction bearings on the same axle and can be brought together so that they couple and rotate as one unit. The first disk, with rotational inertia 3.30 kg·m2 about its central axis, is set spinning asked on April 18, 2010 65. chemistry 25 ml of milk were titrated with a 0.124M KOH solution of potassium hydroxide. If 4.5 ml of KOH solution were required to reach the titration endpoint, with a percentage (% w / v) lactic acid present in the milk? (MM = 90.08g / mol) asked on June 16, 2018 66. Social Studies What country set up the first merchant company asked on November 14, 2016 67. chemistry For which salt in each of the following groups will the solubility depend on pH? Pb(OH)2 PbCl2 asked on December 4, 2011 68. English How is the word brusque used in a complex sentence? please give examples. asked on October 28, 2014 69. arrays Another band has 48 speakers. They stack them at least 4 high, but no taller than 6 high. What are all the different arrays they can make? asked on September 20, 2012 70. Physics Left over from the big-bang beginning of the universe, tiny black holes might still wander through the universe. If one with a mass of 3.5 1011 kg (and a radius of only 1.0 10-14 m) reached Earth, at what distance from your head would its gravitational asked on February 19, 2011 71. Science How much would a 75 kg man weigh due to the effect of gravity? asked on November 4, 2010 72. chemistry A calorimeter is filled with 250.0 g of water at 24.6oC. A 60.0 g sample of a metal at 100.0 oC is dropped in this calorimeter and causes the temperature to increase a total of 4.5oC. What is the specific heat of the metal (in J/g°C)? Ignore the asked on July 1, 2018 73. chemistry For a 0.50 molal solution of sucrose in water, calculate the freezing point and the boiling point of the solution. Please list each step.? asked on September 12, 2017 74. Finance Your program has a proposed RDT&E-funded project scheduled to start in January 2015 which is expected to take 16 months to complete. The project is expected to cost a total of$16 million (then-year dollars), with cost expected to be incurred at a rate of

asked on October 8, 2014
75. physics

A piece of metal at 80 degrees celsius is placed in 1.2 L of water at 72 degrees celsius. The system is thermally isolated and reaches a final temperature of 75 degrees celsius. Estimate the approximate change in entrophy for this process.

asked on April 19, 2012
76. math

Suppose that a crayon weighs the same as a marker. You have a box of crayons, 4 extra crayons, and 20 markers. Let b be the number of crayons in the box. A scale balances with all the crayons on one side and all the markers on the other. You remove markers

asked on October 2, 2014
77. Science

Which of the following is true about an object that floats in water? (1 point) The object is less dense than frozen water. The mass of the object is less than that of water. The density of the object is less than that of water. The volume of the water is

asked on April 19, 2013
78. chemistry

Calculate the volume of hydrogen gas from the C4H9O3N compound, under temperature or pressure conditions (STP).

asked on July 30, 2018
79. chemistry

A 0.8552g sample of copper alloy is treated with 8 molar nitric acid and filtered and the precipitate is ignited giving a residue of 0.0632g of SnO2. The zinc is determined in one half of the filterate by precipitating it as ZnNH4PO4 and then igniting with

asked on September 15, 2017
80. math

Explain whether the following statement is true or false: “The ordered pair (1,5) is the same as the order pair (5,1).”

asked on July 2, 2013
81. Chemistry

100 grams of glucose is mixed with 500 grams of water. 10 grams of yeast is then added to the mixture. If the reaction goes to completion, what is the mass of ethanol in the final mixture?

asked on April 28, 2011
82. tech math

Each cylinder bore of a cylinder engine has a diameter of 2.50in. and a height of 4.90 what is the combined total surface area of all four cylinder?

asked on November 12, 2015
83. chemistry

An ore contains Fe3O4 and no other iron. The iron in a 65.46 gram sample of the ore is all converted by a series of chemical reactions to Fe2O3. The mass of Fe2O3 is measured to be 37.9 grams. What was the percent Fe3O4 in the sample of ore? Answer in

asked on September 7, 2014
84. Algebra 1

A right triangle has 1 leg that is 2" longer than the other leg. the length of the hypotenuse is sqrt 130" Find lengths of legs 0=2x^+4x-126

asked on May 31, 2015
85. social studies

Which of the following best describes the difference between a keyword and subject search? Please make selection! A keyword search uses subject headings, but a subject search does not A subject search can retrieve false hits, but a keyword search does not

asked on August 21, 2012
86. physics

Three identical balls are thrown from a cliff of height, h, above a horizontal plane. One ball is thrown at an angle of 45 degrees above the horizon, the second is thrown horizontally, and the third is thrown at an angle of 30 degrees below the horizon

asked on December 2, 2009
87. biology

There are two methods used for cutting DNA into small pieces – this is via ultrasound and restriction enzymes. Which method is considered better and why?

asked on May 21, 2008
88. Chemistry - Radioactivity

The activity of a sample of Ba-137m has decreased by 75% from its initial activity after 5.10 minutes. What is the half-life of Ba-137m? What fraction of activity remains after 6.25 minutes? (A=Aoe (-kt); k = .693/t1/2)

asked on September 27, 2015
89. geometry

a block prism has a volume of 36 cubic units, what is the least and greatest surface area it could have

asked on March 2, 2011
90. ICS

I need help solving this question. "Two charges are 10 meters apart. The charge on the positive particle is 1.0 C and the negative charge is 10 Coulombs. Calculate the magnitude of the electrostatic force of attraction between these two charges."

asked on January 25, 2008
91. Trig/PreCalc

Find a parametrization for the line segment with endpoints (5,2) and (-2, -4).

asked on January 10, 2017
92. Physics

A 5.7 g bullet leaves the muzzle of a riﬂe with a speed of 636.8 m/s. What constant force is exerted on the bullet while it is traveling down the 0.5 m length of the barrel of the riﬂe? Answer in units of N

asked on October 13, 2016
93. Vectors, Math

A is (3, 2) and point B is 4 units from A in the direction (1,-1) Find AB(arrow). Find the coordinates of B. I can't do this question, Ive attempted it many times.

asked on April 11, 2016
94. religion

The Middle East is the spiritual homeland for all of the following world religions EXCEPT

asked on April 2, 2011
95. 7th grade pre algebra

We need assistance solving 3 + 2(k+1) = 6 + 3k I know the 2(k+1) has to become 2k + 2 then we have 3 + 2k + 2 = 6 + 3k then we can subtract 3k from both sides to get 3 +2k + 2 - 3K = 6 But can I combine the 3+2 on the left and the 2k - 3k to get -1k?

asked on November 6, 2008
96. science

0,0,3,4,5,7,8,9,36

asked on April 24, 2019
97. phusics

A car can slow down at 5.10 m/s2 without skidding when coming to rest on a level road. What would its acceleration be if the road were inclined at 12o uphill?

asked on October 4, 2011
98. math

find the product or quotient. write the strategy you used, write model, break apart, multiplication table, inverse operations, pattern, or doubles

asked on September 25, 2011
99. Math - Calculus

Show that the equation x^3-15x+c=0 has at most one root in the interval [-2,2].

asked on February 28, 2011
100. Math - Calculus

Show that the equation x^3-15x+c=0 has at most one root in the interval [-2,2]. Perhaps Rolle's Theorem, Mean Value Theorem, or Intermediate Value Theorem hold clues? ...Other than simply using my TI-84, I have no idea how to accomplish this.

asked on February 28, 2011

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