Wednesday
July 1, 2015

Posts by george


Total # Posts: 929

Physics
A spherical helium filled balloon is attached to a string that is fixed to the ground. the balloon has a volume of .30/4m^3 and helium has a density of .20 kg/m^3. What is the weight of the balloon and helium if the tension on the string is .8N?
October 11, 2013

Physics/Electricity
An aluminum wire carrying a current of 9.0 A has a cross-sectional area of 7.0X10^-6 m2. Find the drift speed of the electrons in the wire. The density of aluminum is 2.7 g/cm3. (Assume three electrons are supplied by each atom.)
October 6, 2013

Math
Would that be 50/100?
October 5, 2013

Math
if the visible part of an ice berg is 50mx50m in area and 20m is above the surface, what is the height, h, below the surface? I have absolutely no idea where to even start.
October 5, 2013

Physics
A metal sphere is found floating in a pool. The sphere is 1m in diameter. If it is half submerged determine the weight of the sphere. You may assume the following: g=10N/kg density of Water = 1000kg/m^3 Vsphere = 4/3pir^3 I get 13.3 as my final answer, but there is no answer ...
October 5, 2013

Psychology
Aren't the variables the same though?
October 2, 2013

Psychology
So, the type of life skill program is the independent variable of this scenario? Can you please explain more as to why? The dependent variable is assessing the effectiveness of the new life skills program in promoting problem solving skills.
October 2, 2013

Psychology
Continuing... Group A gets the life skills training for 2 days. Group B meet at the same time and they plan their own activities. Group C takes part in the prison program. At the end of 12 weeks, all three groups are assessed on their ability to solve personal and ...
October 2, 2013

Psychology
What is the independent variable in this scenario: A research Psychologist is working in a federal prison and is asked to asses this new program. From 70 inmate volunteers, the psychologist randomly assigns 45 inmate volunteers to three groups: group A, group B, and group C.
October 2, 2013

Astronomy
(a)
October 1, 2013

Geometry
A cylindrical hockey puck is 1in high and 3in in diameter. What is its volume in cubic inches?
September 30, 2013

Geometry
Find the area of a regular pentagon with radius 5in.
September 30, 2013

Geometry
The length of each side of a rhombus is 16. The longer diagonal has length 26. Find the measures of the angles of the rhombus to the nearset degree.
September 30, 2013

Geometry
The altitude to the hypotenuse of a right triangle ABC divides the hypotenuse into 12mm and 16mm segments. Find the lengths of each of the following. A. The altitude to the hypotenuse B. The shorter leg of angle ABC C. The longer leg of angle ABC
September 30, 2013

Geometry
Find the area of each equilateral triangle. The triangle has 12cm sides. The triangle has 10in altitudes.
September 30, 2013

Geometry
The circumference of the ball of string is 415ft and it weighs 13,0000Ib. Which is the best approximation of the volume of the ball of string? F.300FT^3 G.600FT^3 H.1200FT^3 I.2400FT^3
September 30, 2013

Geometry
The circumference of the ball of string is 415ft and it weighs 13,0000Ib. what is the radius of the ball of string to the nearest tenth of a foot? A. 3.3 B. 6.6 C. 13.2 D. 20.75
September 30, 2013

Geometry
Find the missing length. MG=10cm, NP=4cm, QP= 14cm, MN=____cm
September 29, 2013

Geometry
The volume of two similar rectangular prisms are 64cm^3 and 1000cm^3. The surface area of the smaller figure is 112cm^2. What is the surface area in square centimeters of the larger figure?
September 29, 2013

Geometry
A lawn chair weighs 8Ib. A child's lawn chair has dimensions exactly one half those of the larger chair. How many pounds does the child's chair weigh?
September 29, 2013

Geometry
The slan heights of two similar pyramids are in the ratio 1:5. The volume of the smaller pyramid is 60m^3. What is the volume in cubic meters of the larger pyramid?
September 29, 2013

Geometry
Two similar pyramids have laterl area 8ft^2 and 18ft^2. The volume of the smaller pyramid is 32ft^3. Find the volume of the larger pyramid.
September 29, 2013

Geometry
A regular pentagonal solid prism has 9cm base edges. A larger, similar solid prism of the same material has 36cm base edges. How does each indicated measurement for the larger prism compare to the same measurement for the smaller prism? Find the volume and weight.
September 29, 2013

Geometry
Which is the best approximation of the volume of the ball of string? A. 300ft^3 B. 600ft^3 C. 1,200ft^3 D. 2,400ft^3
September 29, 2013

Geometry
what is the radius of the ball of string to the nearest tenth of a foot? A. 3.3 B. 6.6 C. 13.2 D. 20.75
September 29, 2013

Geometry
find the radius of a sphere withh the given property. A.The number of square meters of a surface area equals the number of cubic meters of volume. B. The ratio of surface area in square meters to volume in cubic meters is 1:5.
September 29, 2013

Geometry
The density of steel is about 0.28Ib/in^3. could you lift a solid steel ball with radius 4in? whith radius 6in? explain
September 29, 2013

Geometry
Give the dimensions of a cylinder and a sphere that have the same volume.
September 27, 2013

Geometry
On September 3, 1970 a hailstone with diameter 5.6in fell at Coffeyville, Kansas. It weighed about 0.018Ib/in^3 compared to the normal 0.033Ib/in^3 for ice. About how heavy was this Kansas hailstone?
September 27, 2013

Geometry
tell whether each of the following points is inside, outside, or on the sphere. A(o, -3,4)B(-1,-1)C(4,-6,-10).
September 27, 2013

Geometry
use pie(3.14) to estimate the surface area and volume of a sphere with radius 3cm.
September 27, 2013

Geometry
A 5 foot tall woman stands 15ft from a statue. She must look up at an angle of 60 degrees to see the top of the statue. How tall is the statue?
September 25, 2013

Geometry
find the area of a hexagon with radius 6.2m.
September 24, 2013

Geometry
find the area of a regular pentagon with radius 5in
September 24, 2013

Geometry
find the volume of a triangular prisim with a=2.3, c=2 and h=1.5
September 24, 2013

Geometry
what shape does a semi circle form when rotated?
September 24, 2013

Geometry
what shape does a square form when rotated?
September 24, 2013

Geometry
what is the volume of a cylinder with a radius of 1.2 and height of 5.3cm
September 24, 2013

Geometry
A plane flying 16 degrees west of north at 289mph is flying in air which is moving 32mph at due west. Find the resulting speed and direction of the plane. (Step by step please!)
September 24, 2013

Geometry
A regular hexagon with radius 6.2m.
September 24, 2013

Geometry
A regular pentagon with radius 5inches.
September 24, 2013

Geometry
Explain why sinx degrees= cos(90-x)degrees. include a diagram with your explanation.
September 24, 2013

physics
2.05 m/s2
September 23, 2013

Geometry
A surveyor measuring the tallest tree in a park is 100ft from the tree. His angle-measuring device is 5 ft above the ground. The angle of elevation to the top of the tree is 48°. How tall is the tree?
September 20, 2013

Geometry
A family vacationed at a beach 120 mi east and 30 mi south of their home. Find the distance and the direction from their home to the beach.
September 20, 2013

Geometry
Twenty minutes after being launched, a hot-air balloon has risen to an altitude of 300 m. The pilot can still see the starting point on the ground at a 25° angle of depression. How many meters is the balloon from the starting point?
September 20, 2013

Geometry
A 5 foot tall woman stands 15 ft from a statue. She must look up at an angle of 60° to see the top of the statue. How tall is the statue?
September 20, 2013

Language and Other Barriers
Thanks guys
September 20, 2013

Language and Other Barriers
9. To be a teacher aide in an ESL classroom, you should A. have an ear for language. B. receive certification in ESL instruction, if possible. C. speak at least one other language besides English. D. have prior teacher aide experience in a “regularâ&#...
September 20, 2013

Chemistry
I was asked this question for homework but I don't even know where to begin. It has 3 parts to answer. 1) add all lone pairs and make multiple bonds with the framework shown to satisfy the octets and make the best Lewis structure. 2) For the C-N bond(s) in each molecule ...
September 14, 2013

chemisrty
565 g block of aluminum metal is cooled from 243 c to 100 c is what?
September 14, 2013

Chemistry
I am also having issues for this structure as well. [CH*subscript3*CH*subscript2*C(CH*subscript3*)CH(CH*subscript3*)CHCH*suscript2*]+ it reads from left to right like this: [CH3CH2C(CH3)CH(CH3)CHCH2]+
September 9, 2013

Chemistry
I am having issues drawing the lewis structure for this...can anyone explain? CHCCH*subscript2*CH0
September 9, 2013

Math
Can someone check my work? the problem is: x=2+3/y and I have to solve for y I get rid of the denominator y and multiply it with X...so it looks like xy=5 then just divide by x on both sides for a final answer of y=5/x
September 1, 2013

Algebra
I am completely lost...please anyone can anyone help? x = 2+y x and 2 are in inches then it says solution y=x(in) - a(in)
September 1, 2013

math
If we use binets formula for the fibonacci numbers we can trivially see that Fp=5^(p-1)/2 mod p implying that the only prime p such that p divides Fp is 5 divides F5=5.
June 18, 2013

math
how do I set up this problem. John has bag of candy, gives 1/2 to his brother and 1/3 of remaining to his sister and has 15 left? how many did he start with?
May 31, 2013

statistics
Sunday? It's Monday.
May 18, 2013

statistics
Difference being, I've finished. Without help. Unlike you.
May 18, 2013

statistics
Even more ridiculous that you are asking for answers for a test.
May 18, 2013

mechanics
Find the total kinetic energy of a 1500 g wheel, 700 mm in diameter, rolling across a level surface at 650 rpm. Assume that the wheel can be considered as a hoop. (b) For the wheel in part (a), calculate the torque required to decrease its rotational speed from 400 rpm to rest...
May 14, 2013

programming
Write a program reads the city names and respective gas prices into 2 single-subscripted arrays in your program - one of type string, the other of type double. (We would call these "parallel arrays" - each corresponding location shows the city name and gas price for ...
May 13, 2013

Chemistry
what is the rate of a first-order reaction that has a reactant concentration of 1.1M and a rate constant of 0.14/s?
May 1, 2013

Math
A jar contains 1 blue crayon, 1 green crayon, 1 black crayon, and 1 red crayon. You grab 1 crayon without looking. Find the sample space for this experiment.
April 30, 2013

Chemistry
Consider the titration of 50 mL of 0.250 M HCl with 0.1250 M NaOH. Calculate the pH of the resulting solution after the following volumes of Na OH have been added. a) 0.00 mL b) 50.00 mL c) 99.90 mL d) 100.00 mL e) 100.1 mL The question is, I get, for example, 0.9 pH for "...
April 27, 2013

Public Speaking
C for both questions
April 24, 2013

Public Speaking
So it's C
April 24, 2013

Public Speaking
Patrick Henry’s famous speech carries the theme “give me liberty or give me death.” This is a speech about: A. events. B. processes. C. concepts. D. objects. This one I'm stuck between C and D
April 24, 2013

Public Speaking
Which of the following is NOT true about persuasive speaking compared to informative speaking? A. Involves more emotional appeal. B. Asks for commitment from the audience. C. Impartial point of view. D. Emotion-evoking language. Is this one B?
April 24, 2013

Public Speaking
Speeches of tribute are intended to do all of the following EXCEPT: A. express feelings. B. inspire the audience. C. arouse sentiments. D. describe an object. This one I believe is D
April 24, 2013

Public Speaking
Effective public speaking is: A. audience-centered. B. message-centered. C. speaker-centered. D. channel-centered. I believe this one is A
April 24, 2013

Public Speaking
I believe it's B
April 24, 2013

Public Speaking
A speaker talking about the benefits of cosmetic surgery to an audience primarily of women is appealing to which level of needs in Maslow’s Hierarchy of Needs? A. Physiological needs B. Esteem needs C. Belongingness and love D. Safety needs
April 24, 2013

chemistry
A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)
April 15, 2013

chemistry
A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)
April 15, 2013

chemistry
A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)
April 15, 2013

ecc
Arginine vasopressin is a pituitary hormone. It helps regulate the amount of water in the blood by reducing the flow of urine from the kidneys. An aqueous solution containing 21.6 mg of vasopressinin 100.0 mL of solution has an osmotic pressure at 25 ¢ªC of 3.70 mmHg...
April 15, 2013

chemistry
Arginine vasopressin is a pituitary hormone. It helps regulate the amount of water in the blood by reducing the flow of urine from the kidneys. An aqueous solution containing 21.6 mg of vasopressinin 100.0 mL of solution has an osmotic pressure at 25 ¢ªC of 3.70 mmHg...
April 15, 2013

chemistry
What is the molality of a solution which contains 20.0 g of cane sugar, C12H22O11 dissolved in125g of water?
April 15, 2013

chemistry
Determine the mole fractions of both substances in a solution containing 36.0 g of water and 46.0 gof glycerin, C3H5(OH)3?
April 15, 2013

ecc
Describe how you would make up3.2 g of a 5.00% aqueous solution of NaCl(i.e. find masses of the components that need to be mixed).
April 15, 2013

ecc
Describe how you would make up3.2 g of a 5.00% aqueous solution of NaCl(i.e. find masses of the components that need to be mixed).
April 15, 2013

ecc
Describe how you would make up3.2 g of a 5.00% aqueous solution of NaCl(i.e. find masses of the components that need to be mixed).
April 15, 2013

ecc
A solution was prepared by dissolving 0.834 g of sulfur, S8, in 100.0 g of acetic acid, HC2H3O2. Calculate the freezing point and boiling point of the solution. (Use the table from the textbook.)
April 15, 2013

chemistry
What is the vapor pressure at 23 ¢ªC of a solution of 1.20 g of naphthalene, C10H8, in 25.6 g of benzene, C6H6? The vapor pressure of pure benzene at 23 ¢ªC is 86.0 mmHg; the vapor pressure of naphthalene can be neglected. Calculate the vapor pressure ...
April 15, 2013

Physics
Which exerts more gravitational force on the baby, Mars or the obstetrician, given that Mars has a mass of 6.4 1023 kg and is 8. 1010 m from Earth?
April 10, 2013

physics
Calculate the force of gravity between a newborn baby of mass 4 kg and the obstetrician of mass 80 kg, who is 0.1 m from the baby.
April 10, 2013

Physics
Calculate the force of gravity between a human child (mass = 38 kg) and the planet Mars (mass = 6.4 1023 kg), when Mars is at its closest to Earth (distance = 8. 1010 m).
April 10, 2013

Math
If a salesman sold 2 cars in his first month, 8 cars in his second month, and 32 cars in his third month, using the same sequence how many cars would he sell in month 4, month 5, and month 6
April 3, 2013

Chemistry
How many moles of H2O are produced when 6 moles of o2 is consumed in burning meyhyl Alchohol
April 1, 2013

math
A FARMER BUILT A PEN FOR HIS FAVORITE PIG. THE PEN SHOWN BELOW HAS AN AREA OF 50 SQUARE FEET.THE PEN IS TWICE AS WIDE AS IT IS LONG AND HAS A PERIMETER OF 30 FEET. WHAT IS THE LENGTH, IN FEET OF THE PEN.
March 27, 2013

Physics
A certain car is capable only of accelerat ing at 3.0m/s 2 , braking (decelerating) at 5.0m/s 2 , and moving at constant velocity. The car is init ially located 100m from a road sign. The driver, starting from rest, begins to accelerat e towards the sign. After maintaining ...
March 20, 2013

Chem
How many grams of Ni would be electroplated if a constant current of 7.2 amperes is passed through a solution of NiSO4 for 90.0 min?
March 19, 2013

accounting
Normal price of mini-scooters are $120 per scooters, ABC estimates 400,000 scooters to be sold for Year 2013. Material costs are $20,0000 per year to produce these scooters. Variable costs are $10.00/per mile delivery and $50.00/scooter for handling charges. ABC is approached ...
March 16, 2013

accounting
Normal price of mini-scooters are $120 per scooters, ABC estimates 400,000 scooters to be sold for Year 2013. Material costs are $20,0000 per year to produce these scooters. Variable costs are $10.00/per mile delivery and $50.00/scooter for handling charges. ABC is approached ...
March 16, 2013

physics
What would the gravitational potential energy be if the bucket were raised six times as high?
March 11, 2013

physics
If you do 110 J of work to elevate a bucket of water, how much energy did you add to the gravitational field?
March 11, 2013

physics
A boulder is raised above the ground so that the gravitational potential energy relative to the ground is 360 J. Then it is dropped. What is its kinetic energy just before it hits the ground?
March 11, 2013

physics
Calculate the work done when a 18 N force pushes a cart 2.5 m.
March 11, 2013

Chemistry
What is the pH of a 0.77M solution of methylamin at 25 degree C? CH3NH2, Kb= 4.4X10-4? How do I set this up to get the answer?
March 7, 2013

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