Barry
Most popular questions and responses by Barry
chemistry
ethanol is a common laboratory solvent and has a density of 0.789 g/ml what is the mass in grams of 139 mL of ethanol
asked on September 3, 2012 
math
A paper cone has a base diameter of 8cm and a height of 3cm a. Calculate the volume of the cone in term of pie b. Calculate the curve surface area of the cone
asked on October 9, 2016 
Physics
A submerged scuba diver looks up towards the calm water of a lake and notes that the Sun appears to be 20 from the vertical. The diver's friend, standing on the shore of the lake, is also looking at the Sun. At what angle from the vertical does the diver's
asked on March 17, 2012 
Physics
A large fish tank is filled with water (of refractive index 1.33). One side of the tank is made of a parallelsided piece of glass. A ray of light strikes the glass from the outside at an angle of incidence of 48. Estimate the angle through which this ray
asked on March 17, 2012 
physics
A car crashes into a wall at 20 m/s and is brought to rest in 0.1 s. Calculate the average force exerted on a 75 kg test dummy by the seat belt. Force*time= change in momentum mv solve for force.
asked on September 27, 2006 
English
What is the rhyme scheme, meter, and stanza form for the poem "The Lamb" by William Blake? The Lamb Little Lamb, who made thee? Dost thou know who made thee? Gave thee life, and bid thee feed By the stream and o'er the mead; Gave thee clothing of delight,
asked on September 14, 2008 
Math
Okay, really I just need to know if this is going to be division, multiplication, subtraction or addition. Damon's town received 12.3 inches of rain during a 24hour period. First, estimate the amount of rain that fell per hour. Then, find the exact amount
asked on January 10, 2019 
physics
A skipper on a boat notices wave crests passing his anchor chain every 9 s. He estimates the distance between wave crests to be 15 m. He also correctly estimates the speed of the waves. What is this speed? Wavelenght* frequency= wave speed remember that
asked on November 5, 2006 
Physics
Laser light with a wavelength = 665 illuminates a pair of slits at normal incidence. What slit separation will produce firstorder maxima (i.e. m=1) at angles of 8 from the incident (or straight through) direction? Remember, 1 nm = m. Express your answer
asked on March 17, 2012 
Math
A piece plywood 24 inches wide is cut into strips 2 and a half inches wide, how many strips of this with can be cut. Please help,7th grade.
asked on October 5, 2012 
Accounting
Horse Country Living publishes a monthly magazine for which a 12month subscription costs $30. All subscriptions require payment of the full $30 in advance. On August 1, 2008, the balance in the Subscriptions Received in Advance account was $40,500. During
asked on March 31, 2009 
Physics
A prism, made of glass of refractive index 1.50, has two plane faces at an angle 33 to each other. A ray of light enters the glass from one side perpendicular to that face and emerges through the other. Part A: As the ray enters the glass, what is its
asked on March 17, 2012 
physics
A bat flying in a cave emits a sound and receives its echo 0.5 s later. How far away is the cave wall? I answered this below. If you cant find it, search on bat flying in the search window above.
asked on November 5, 2006 
Physics
At time t = 0, a projectile is launched from ground level. At t = 2.00 s, it is displaced d = 53 m horizontally and h = 54 m vertically above the launch point. What are the (a) horizontal and (b) vertical components of the initial velocity of the
asked on January 6, 2015 
Physics
A brick dropped from a roof hits the ground 4.14 seconds later. How high (in m) was the roof?
asked on October 4, 2012 
Physics
Bob has a helicopter and from the launch pad, he flies the following path. First. he travels from the launch pad a distance of 20km at a heading of 30 degrees East of South (240 degrees). Then he flies 45 km heading 65 degrees West of North (155 degrees).
asked on September 23, 2018 
math
Assume the brakes of an automobile produce a constant deceleration of k ft/sec^2. Determine what k must be to bring an automobile traveling 60 mph to a rest in a distance of 100 ft from the point where breaks are applied? With the same k, how far would a
asked on April 15, 2015 
science
If a car has a constant acceleration of 4 m/s², starting from rest, how far has it travelled by the time it reaches the speed of 40 m/s?
asked on March 28, 2015 
english
what are the pros and cons of joining "netville 2" a computer company that came to your neighbourhood. We will be happy to critique your thinking on this. thanks im having trouble thinking of cons. The only thing i have for cons are: hidden fees and
asked on April 21, 2007 
math derivatives
An architect is designing a rectangular building in which the front wall costs twice as much per linear metre as the other 3 walls. The building is to cover 1350 m2. What dimensions must it have so that the costs of the walls is a minimum? write a formula
asked on June 6, 2015 
business
1. What kind of risk analysis would you use when purchasing a house or a personal vehicle? Describe this analysis. How does this process assist you in making your decision? Do you believe the process is efficient and achieves the results you desire? How
asked on July 1, 2011 
Physics121
What are the three longest wavelengths for standing sound waves in a 124cmlong tube that is (a) open at both ends and (b) open at one end, closed at the other?
asked on November 7, 2009 
Physics
A ball was thrown straight up at 26.2 m/s then caught at the same place it was released. How many seconds was it in the air?
asked on October 4, 2012 
business
2. Think of a risk response plan that you have in your personal life, such as automobile, homeowner’s, or renter’s insurance. What were some of the decision criteria that influenced your decision about how much coverage to purchase? How does your
asked on July 1, 2011 
grammar
trying to Capitalize the proper nouns in the sentence
asked on December 8, 2009 
math
an airplane flies at 150 mph and heads N 30 degrees east. A 40 mph wind blows it in the direction S 30 degrees E. What is the planes resultant velocity
asked on May 25, 2016 
mathurgent please help
Newton’s Law of Cooling states that the temperature of a heated object decreases exponentially over time toward the temperature of the surrounding medium. The temperature u of a heated object at a given time t can be modeled by the following function:
asked on December 4, 2012 
math algebra
If the principal P = $900, the rate r = 4 1/2, and time t = 1 year, find the following: What is the amount of interest? What is the future value?
asked on July 31, 2011 
math
for people each bought two bottles of vermont maple syrup. each person plans to share their bottle with three friends. how much does each person get?
asked on February 18, 2010 
Statistics
I have completed 6 questions but after 2 hours still cannot do these 4 questions. Please help 1) Jane is playing a game of Monopoly, if she throws six on her next turn she will land on community chest. If she throws eight she will land on Mayfair with a
asked on June 28, 2017 
math
I don't understand factoring. One of my homework questions asks for that. The question is "The area of a rectangular garden is given by the trinomial x to the 2nd power plus x 42. What are the possible dimensions of the rectangle? Use factoring.
asked on July 30, 2015 
spanish
How would I complete this question? hago mi tarea en la_______
asked on August 31, 2010 
grammar
The dock is on Fish Lane. CAPITALIZE the proper nouns in the sentence.
asked on December 8, 2009 
garmma
She and mom got to the Dock late.
asked on December 8, 2009 
Physics / Astronomy
Here is my question: Consider the bending of light by the gravitation of the Sun as described by Newtonian physics. Light of frequency f passes at a distance d from the center of the Sun, which has a mass M. Show that the bending angle of the light is
asked on May 28, 2008 
algebra
Which of the equations is graphed below? Question 1 options: y = x2 + 6x + 10 y = x2 + 3x + 2 y = x2  6x + 10 y = x2 + 6x  10
asked on October 2, 2018 
Physics
There is an outcropping of ice with a large drop to a slope below. A 100kg piece of ice breaks off with a 60kg person on top of it, and falls o the slope below. The piece of ice slides down the slope to the bottom and onto a horizontal portion. It slides
asked on July 25, 2016 
math
find the exact value cos (5 pi/ 12)
asked on January 22, 2015 
Math
A manufacturer of softdrinks advertises that their orange soda as "naturally flavored," although it contains only 5% orange juice. A new federal regulation stipulates that to be called "natural" a drink must contain at least 10% fruit juice. How much pure
asked on January 31, 2013 
1st grade
if yo have three words friend, things & might which word has the long i sound and which word can you get by adding a sound to in? a tin,b hid c find
asked on March 29, 2010 
Matrix application
Part of the road is to be on a parabolic curve given by a function of the form y = ax^2 + bx + c where x and y are local coordinates. The road alignment must pass through the following 3 points: x = 150m y = 190.650m x = 300m y = 611.450m x = 450m y =
asked on December 5, 2016 
Derivatives Instantaneous rate of change
The electric field E at a distance r from a point field is E =K/r^2 where k is a constant. Find an expression for the instantaneous rate of change of the electric field with respect to r.
asked on June 3, 2015 
Math
4x4+4x4+44x4=?
asked on June 1, 2013 
math
I have a diagram of an occupied building space within a larger building represented by 49 equal squares but no linear measures for the sides. The space is 120,000 sq ft. how can i estimate the lengths and widths of the floor space with just this
asked on December 13, 2012 
math
you have an unfortunate brush with the law and you are required to spend some time in the penitentiary. (Naturally you have brought your math 30 course notes with you for a bit of light bedtime reading. You also hope to enlighten your fellow inmates with
asked on December 4, 2012 
literature
"The best in this kind are but shadows" is
asked on December 1, 2009 
human life
WHOSE LIFE IS IMPORTANT?
asked on January 17, 2009 
Maths
Please help. I completed 16 but these 4 are hard; the wording confusing. 1) Jane is playing a game of Monopoly, if she throws six on her next turn she will land on community chest. If she throws eight she will land on Mayfair with a hotel (owned by
asked on June 29, 2017 
calculas
Please help don't understand how to solve it. 3xy6x+2y^2 dx/dt=6 x=2 y=3 thank you
asked on June 28, 2016 
Science
Calculate the resultant of force of 200 N due west and a force of 90 N at 60 degree NW
asked on November 28, 2015 
Math natural logarithms
The efficiency e of a gasoline engine as a function of its compression ratio r is given by e =1− r^(1−γ) , where γ is a constant. Find γ for e = 0.55 and r = 7.5
asked on May 16, 2015 
math
how is GCF and LCM different? im in 4th grade and i tried to understand but my mum said shes not sure so please i need help
asked on January 22, 2015 
Chemestry
how to balence an equasion
asked on June 1, 2014 
biology
I have to do a lab report on the effect of metal ions on enzyme activity One of the questions asked the sources of error and one asked the methods used I got stuck, can you pls help
asked on April 16, 2014 
Math
A pot contains 6 liters of brine at a concentration of 120g/l. How many liters of the water should be boiled off so that concentration of the brine is 200g/l.
asked on January 31, 2013 
algebra
4x5=6+3x
asked on November 5, 2012 
math
simplify this expression (3xy)^2(2x^2z)^3
asked on November 5, 2012 
math
is 6.31 equal to 0.631
asked on March 26, 2012 
math
how to solve the set of system equations 6x  y  2 = 0 dan 3x  2y + 5 = 0
asked on March 4, 2012 
Physics
How much pressure is exerted by a 5000 pound moving vehicle vehicle (hehicle is 6' x 12')?
asked on November 6, 2010 
Grammar
Which sounds better my brother knows more about technology than me or I
asked on March 19, 2010 
Finance
I don't have a formula for this question: Purchasing Power= 1280.08 (Nov.1/07) Purchasing Power= 1000.00 (Nov.1/97) What is the annual rate of inflation? I think it can be solved 1280.08/1000 1 but Im not sure??
asked on November 7, 2008

history
The answers for Global Politics and Economics are 1: B 2: D 3: C 4: B So Camera and Harley's answers are correct. I don't know why Martha's would have had different answers, but for anyone in INCA, these are right.
posted on April 29, 2019 
science
Fav food is meat loaf
posted on April 8, 2019 
Latin (GA Connections Academy)
Okay, I know I'm late, but I just wanted to do this anyways. Here's what I got: 1. Things were done in the wars of by the Greeks, in the Romanist. 2. She was taught by the sailors Greek sword fight. 3. From bright to the queen of the wild beast of the poet
posted on January 10, 2019 
Math
Thank you!
posted on January 10, 2019 
reding
I suspect the questioner is asking whether Farmer Brown farms, or farmer Brown farms. See the difference? If the farmer Mr Brown is generally known as Farmer Brown, the word farmer has been elevated to a nominative category unique to Mr Brown and thus
posted on September 25, 2018 
SCIENCE HELP PLEASE
Am be
posted on February 12, 2018 
SCIENCE HELP PLEASE
Scientifically if the moon spun on the same rotational period as earth we would typically see the different parts of the moon
posted on February 12, 2018 
Algebra
1.1
posted on January 6, 2017 
Chemistry
One ppm is one millionth of a gram or in simpler terms, 10^6.
posted on December 6, 2016 
calculas
Assume x and y are functions of t, Evaluate dy/dt, 3xy6x+2y^2 dx/dt=6 x=2 y=3 dy/dt
posted on June 28, 2016 
math
5/18
posted on April 29, 2016 
math
thanks the weebsite is fun
posted on January 22, 2015 
Eng B
Beyond tone a poet's attitude toward his or her subject reveals to us a poem's? A. theme B. subject C. diction D. structure I think it's A. LiteratureHelp me Ms. Sue  Ms. Sue, Thursday, July 3, 2014 at 8:35pm I agree. this person must have been really
posted on October 7, 2014 
math
Dear Roberta, the answer should be D recall the identity (ab)^2 = a^2  2ab + b^2 Hope it helps Wishing you the best of luck barry
posted on July 13, 2014 
math
Dear Roberta, Let the number of people be y 100 + 20y = 25 + 25 y 75 = 5y y = 15 So the answer should be B Hope it helps! Wishing you the best of luck, Barry
posted on July 13, 2014 
math
Dear Roberta, the answer is D (1/2)(10t) =50,000 (10t) =50,000 /(1/2) 10t= 100000 t = 10000 Hope it helps! Wishing you the best of luck Barry
posted on July 13, 2014 
Algebra
Dear sharon, 840 x 0.02 = 16.8(decimal number) 16(integer) Hope it helps! wishing you the best of luck Barry
posted on July 13, 2014 
Math
Hi! the question is ¡Ô(4x+1) + ¡Ô(x+1) = 2 Square both sides (¡Ô(4x+1) + ¡Ô(x+1))^2 = 2^2 still remember the identity (a+b)^2 = a^2 + 2ab + b^2 let ¡Ô(4x+1) be a ¡Ô(x+1) be b as a^2 + 2ab + b^2 we can derived the equation 4x+1 +
posted on July 12, 2014 
Algebra
Dear sharon, the first equation y = 7x  9 slope= 7 yintercept= 9 the second equation 3y = 21x + 7 y = 7x (7/3) slope= 7 yintercept= (7/3) To determine whether the two lines are perpendicular slope of equation 1 X slope of equation 2 must be 1.
posted on July 11, 2014 
math
Dear Kyle, Sub (a,3) into the equation 5x + y = 8 5a + 3 = 8 5a = 5 a = 1 Hope it helps! wishing you the best of luck, Barry
posted on July 10, 2014 
math
Dear Kyle, the equation of circle let (h,k) be the center of the circle let the radius be r then the equation of circle will be (xh)^2 + (yk)^2 = r^2 so according to your equation of circle given the center point= (5,7)
posted on July 10, 2014 
chem/math
Dear Ann, 3.88 = 3.74 + log (x/0.1) 0.14 = log (x/0.1) 10^(0.14) = x/0.1 x = 1.38 x 0.1 x= 0.138 These are the calculation steps. I suppose the answer is 0.138 instead of 0.137. Ann,do you mind showing your calculation steps so I can know what is your
posted on July 8, 2014 
algebra
Dear Marcus, The answer is 1/(2x^9y^3) since [10x13y^12]^0 = 1 as there is a rule And the denominator cannot be further simply Hope it helps!
posted on July 6, 2014 
Math
Dear High, The amount that you are going to get =1000 x (1+(0.08/4))^(4x7) =1741.024 For the interest that you are going to get= 1741.0241000 = 741.024
posted on July 5, 2014 
chemistry
Dear shashank, The chemical formula of FeSo4.7H2O = 55.8+ 32.1+ 16x4 + 7x18 = 277.9 The percentage of water of crystallization= = (7x18)/ 277.9 x 100% = 45.34%
posted on June 30, 2014 
math
I= PRT Simple interest = 280 Nigerian naira X 2.5 X 0.03 = 21 Nigerian naira
posted on June 22, 2014 
Chemistry
Dear akhmal, mol of sucrose used= 1/(12x12 + 22 + 11X16) = 2.92x10^3 as 1 mole of sucrose will produce 12 moles of Co2 mol of CO2 produced= (2.92x10^3)X 12 = 0.035 grams of CO2 produced = 0.035 X (12+32) = 1.54g as 1 mole of sucrose will react with 12
posted on June 22, 2014 
chem
Dear marie, I guess there is no AlO3 existing So do you actually mean aluminium oxide (Al2O3) The balanced equation is 3OH + AL3+ > Al(OH)3 mol of aluminium oxide needed= 98.1 as 1 mole of aluminium oxide required 3 moles of sodium hydroxide to
posted on June 22, 2014 
rates
The amount of petrol required for each Km = 18/90 =0.2L The amount of petrol needed for 200km =0.2x200 =40L
posted on June 21, 2014 
maths
The largest share is 650x(6/13) = 300
posted on June 21, 2014 
Chemistry
Dear Sally, as I have replied you before, I am not sure whether you have checked HCL(aq) + NAOH(aq) NACL(s)+ H20(l) Number of moles in the NAOH(aq)= 40/(23+16+1) =1 as 1 mole of HCL will react with 1 mole of the Naoh solution number of mole of HCL
posted on June 19, 2014 
Chemistry
Dear Sally, Here is the balanced equation HCL(aq) + NAOH(aq) NACL(s)+ H20(l) Number of moles in the NAOH(aq)= 40/(23+16+1) =1 as 1 mole of HCL will react with 1 mole of the Naoh solution number of mole of HCL required= 1 Still remember that there is a
posted on June 19, 2014 
chemistry
Dear hifsa still remember there is a formula Molarity= mol/dm cube so ........ 0.5= mole/ (1.25/1000) number of mole= 6.25x10^4
posted on June 19, 2014 
Chemisty
Dear Veronica, number of moles of HNO3 used= 0.602x(23.4/1000) = 0.014 number of mol of Cu used= 0.014/8x3 =5.28255x10^3 mass of the Cu involved in the reaction = 5.28255x10^3 x 63.5 = 0.33544g %by mass of Cu = 0.33544/0.411 x 100% = 81.6%
posted on June 17, 2014 
Chemistry
Dear Brett, molar mass of the HNO3= 1+14+16x3 =63 number of moles of the HNO3 produced in the reaction = 7.5/63 = 0.119 According to the equation provided 3 moles of NO2 will produce 2 moles of HNO3 Thus,number of moles of NO2 required= 0.119/2x3 = 0.179
posted on June 17, 2014 
Chemistry
Dear Abdulhafiz the no of mole of the 50ml of ph3 solution= (1x10^3)x (50/1000) = 5x10^5 the number of moles in the 50ml of ph5 solution= (1x10^5) x (50/1000) = 5x10^7 Total no of moles in the solution = 5x10^5 + 5x10^7 = 5.05x10^5 The molarity of
posted on June 17, 2014 
MATH ✿╣Check╠✿
3/ (6+5+4+3) = 1/6
posted on May 4, 2014 
add maths
Dear Mandy, Here is the solution log2 0.45 = log2 (9/20) = log2 9  log2 20 = 2log2 3  log2 (4x5) = 2h (log2 4 + log2 5) = 2h(2+k) = 2h2k Hope this helps
posted on May 3, 2014