Thursday
March 23, 2017

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Posts by andy

Total # Posts: 940

Physics
9.) A 1 570 kg satellite orbits a planet in a circle of radius 5.94 x 106 m. Relative to zero at infinity the gravitational potential energy of this satellite is -9.32 x 1011 J. What is the mass of the planet?
March 10, 2017

Chemistry
thanks
March 7, 2017

Chemistry
What would be a good chemical blank to use for the Tollen's Test (Silver Mirror test)?
March 7, 2017

biology
physics osmosis
February 27, 2017

Calc
Compute ?y and dy for the given values of x and dx = ?x. y = x^2 ? 7x, x = 6, ?x = 0.5
February 26, 2017

Math 2
If your playing a game where you have 4 cards and you have to arrange them in to 2 digit numbers so they add up to a number near 100, and then you take the number you got and subtract it from 100, and then you play this game 7 times with 3 other people, and when you add up all...
February 6, 2017

Math
Three boys and three girls all celebrate their birthday today, but they are each different ages. The youngest is 1 years old. The sum of the ages of the three girls is the same as the sum of the ages of the three boys. What is the smallest possible total of all six ages?
February 5, 2017

Math
Suppose one person decides to carry out a random act of kindness for three people on Monday. On Tuesday, that same person is kind to three more people, and the three he/she helped on Monday each help three more individuals. If the same circumstances were to occur on Wednesday...
January 25, 2017

English
And what's the point of thus website if you can't help me?
January 24, 2017

English
No it is not an assignment. I read this at the end of a book and I wanted to know what it means
January 24, 2017

English
What is the meaning behind this quote: you've gotta dance like there's nobody watching love like you'll never be hurt sing like there's nobody listening and live like it's heaven on earth
January 24, 2017

Chemistry
In my upcoming lab we are extracting caffeine from tea through distillation. I was wondering why adding CaCO3 helps this process? Is it due to the basic nature of CaCO3 which decreases the polarity of the caffeine, making it less reactive with water?
January 22, 2017

math
a 6 foot red casts a shadow that is 7 feet long. the shadow of a nearby tree is 42 feet long. slove a proportion to find the height of the tree
January 18, 2017

physics
What is the initial angle 0f projection of a projectile for which the range and the maximum height are equal?
January 13, 2017

LA
Huh?
January 11, 2017

LA
PLEASE HELP
January 11, 2017

LA
Rewrite using a possessive noun: the (separate) bikes of Keith and Frank, the brooms of the witches, and the dog of Mike and Erin
January 11, 2017

ellipse
Write the equation of ellipse that satisfy the following condition A)centre at c(-2,3),one focus is f(-2,7) and one vertex is v(-2,10). B) centr at c(-1,2) focus at F(-1,5) and passes through point P(5,6).
December 24, 2016

physics
Geostationary satellites are placed on orbits of radius 4.2×10^4m use this information to deduce g, the acceleration of freely falling body, at this height.
December 23, 2016

physics
At ground level g is 9.8meter per second square. Suppose the earth started to increase its angular velocity. How long would a day be when the people on the equator were just 'thrown off' why is the expression thrown off is a bad one?
December 20, 2016

Business
list of companies that uses decision making process?
December 10, 2016

Science
Why Emma why
November 28, 2016

Social studies (Help)
I'd agree with you.
September 27, 2016

Algabra
Dick is younger than Tom, but older than Harry. Their ages in years are consecutive odd integers. Dick's mother is three times as old as Dick, and she is also 13 years older than twice as old as Tom. How old are Harry, Dick, and Tom
September 26, 2016

phsyics
The x and y components of a certain force are measured and found to be Fx = (68 ± 3)N and Fy =(42 ± 2) N, respectively. Calculate the magnitude of this force? expressing your result to the proper number of significant figures.
September 25, 2016

Life Orientation
Battery cages
August 16, 2016

Phy.Chem
Need some help :) Thanks! A sample of a glass occupies a volume of 525 ml at 625 mm Hg. At constant temp, what will be the new volume when the temp changes to the ff: a.) 1.5 atm b.) 455 mm Hg
August 2, 2016

12th grade chemistry
It is required to titrate ethanol solution .Being available a 0.2mol/l potassium dichromate solution and 4mol/l sulfuric acid solution on the presence of a convenient indicator. a)indicate the glassware used for titration. b)give a brief description of the procedure followed ....
July 12, 2016

Physics
In the figure, a small 0.125 kg block slides down a frictionless surface through height h = 0.958 m and then sticks to a uniform vertical rod of mass M = 0.250 kg and length d = 2.32 m. The rod pivots about point O through angle θ before momentarily stopping. Find θ.
July 3, 2016

English
1. Predominant 2. Default 3. Confiscate 4. Decipher 5. Concurrent 6. Recession 7. Prerequisite 8. Constitute 9. Nominal 10. Hypothetical
June 5, 2016

Math
Lisa and Katie are playing a card game, and a total of 900 points has been scored. Lisa scored 400 more points than Katie. If you let l= l= the number of points that Lisa scored, and k= k= the number of points that Katie scored, then the problem can be represented by the system:
May 30, 2016

math
I would think so.
April 28, 2016

math
Think of counting by 5's. 5, 10, 15, 20, 25 and so on. *Pretty sure, first time I'm answering on here.* (:
April 28, 2016

Finance
You want to be able to withdraw $25,000 from your account each year for 20 years after you retire. If you expect to retire in 25 years and your account earns 7% interest while saving for retirement and 6.7% interest while retired Round your answers to the nearest cents as ...
April 27, 2016

math
What is 78 / 9 x 3 + (6 - 9)?
March 29, 2016

Collage Physic
A uniform rod hangs vertically on a frictionless horizontal axle passing through its center. The rod is 35cm long and 85g. A 15g ball of clay travelling horizontally at 2.5cm/s hits and sticks to the bottom of the rod. What is the maximum angle the rod makes with the vertical ...
March 28, 2016

Physics
A 66.0 kg rider sitting on a 9.4 kg bike is riding along at 9.1 m/s in the positive direction. The rider drags a foot on the ground and slows down to 7.0 m/s still in the positive direction. What is the change in momentum of the rider and bike?
March 23, 2016

Physics
A 25 g bullet with a muzzle velocity of 300 m/s is fired into a board 4.0 cm thick. For a soft board, the bullet goes through the board and emerges with a speed of 50 m/s. What was the average force exerted on the bullet by the board? Answer= 27344 N Show Work
March 18, 2016

Maths sequences
Thank you !
February 20, 2016

Maths sequences
Question= Find the sum of all the odd numbers up to and including 99,999. Would a=1 because its the first odd number in the sequence? And would d=2 ? So then would you do S99,999= 49999.5(2+99,998(2)) Then divide by two?
February 20, 2016

math
5/8 x+ 1/16 x = 3/16 + x x= - 3/5 I'm trying to verify my answer. these are fractions
February 8, 2016

Math
idk what but, 10.5 divided by 3 is 3.5
February 8, 2016

math
a recipe calls for 5/7 cup of granola. how much is needed to make half the recipe.(1/2)(5/7)= 5/14 Is this correct?
February 5, 2016

Physics
It's my first time taking physics, how would I get to the answer?
January 24, 2016

Physics
A tennis player strikes a ball when it is 1 m above the ground, with a velocity 17 m/s at 30 degrees above the horizontal. The net is 4 m away horizontally and it is 0.6 m high. How high, vertically, above the net does the ball pass?
January 24, 2016

art
how Picasso used shape or form in the Weeping Woman, and the effect of that usage on the artwork.
January 20, 2016

math
what is pi
December 7, 2015

science
I need an acrostic poem about forces
December 7, 2015

Physics
A person who is 1.6 m tall throws a ball with a speed of 6.4 m/s at an angle of 65 degrees above the horizontal. What are the x and y components of the velocity (in m/s) of the ball the instant before it strikes the ground?
December 2, 2015

Hinigaran, math
Four numbers are in the ratio 1:4:5:8. If the largest is 144, what is the sum of the four numbers?
December 1, 2015

math
Nina has a stick 5 ft. long. She saw it into 8 equal length pieces. How long will each piece be? Fraction Would it be 5/8 or 8/5 confused
November 17, 2015

math
Straight Numeric and Terminal Digit Filing i don't understand it at all
November 14, 2015

History of Muslims
1)what is the reason for the battle of uhud? 2)why did Wahshi al habashi want to kill hamza (the prophet mohammad's uncle)? 3) What was the prophet's plan on this battle ? 4)how many soldiers were in the muslims army and in the meccan army? 5)Why did the muslims lose ...
November 11, 2015

Physics
Two particles, of mass m and mass nm, undergo a head-on, fully elastic collision. (Here n is just a unitless number.) Before colliding the particles approach one another with equal speed v. Snapshots of the particles before, during, and after the collision are shown above. ...
November 3, 2015

Math
?BCD ? is a right triangle. The length of the hypotenuse is 18 cm. The length of one of the legs is 14 cm. What is the length of the other leg? Enter your answer in the box as a decimal rounded to the nearest tenth.
October 29, 2015

economics
quainty would go down
October 18, 2015

Science Urgent😖😖😖
Organisms need to reproduce so they can keep species going.
October 12, 2015

History
Check my homework? Choices: A. Barbed-wire fences, B. windwills, C. steel plows, D. McCormick Reaper, E. railroads Question: Life on the prairie was difficult for everyone. But there were ways to succeed. Match the problems homesteaders faced with possible solutions. little ...
October 10, 2015

History
Check my homework? Choices: A. Barbed-wire fences, B. windwills, C. steel plows, D. McCormick Reaper, E. railroads Question: Life on the prairie was difficult for everyone. But there were ways to succeed. Match the problems homesteaders faced with possible solutions. little ...
October 10, 2015

AP Calculus AB
Hello! I'm having trouble with this related rates problem: A 5ft tall person is walking away from a 16ft tall lamppost at a rate of (2/x) ft/sec, where x is the distance from the person to the lamppost. Assume the scenario can be modeled with right triangles. At what rate ...
October 4, 2015

Pre-Algebra
$85
October 4, 2015

physics
Solve it pls?
September 20, 2015

MATH HELP
was is the right answer?
September 9, 2015

algebra, numerical operation
Danny made a mistake in the following problem. Each line shows the steps Danny took in order to solve the problem. The mistake was made in Line ___. Only input the number of the first incorrect line. Line 1 21 + 35 ÷ 7 + 6(2) Line 2 21 + 5 + 6(2) Line 3 21 + 11(2) Line ...
August 26, 2015

math
thanks steve
August 13, 2015

math
a pantry contains 6 shelves each 42 inches long. the shelves are to be reclined with fresh paper. the paper is sold in 1 yard rolls. the number of 1 yard rolls needed is:
August 13, 2015

Maths Lit, Accounting, Economics, Business Studies
I am a grade 10 learner doing Maths Literacy, Accounting, Business Studies, Economics, Life Orientation, English and Afrikaans I want to know what Degree I can study in University and also to check what career path I would be able to do.
August 5, 2015

Calculus
1. Provide an example of a function f that is continuous at a = 2 but not differentiable at a = 2. 2. Provide an example of a function g that is differentiable at a = 3 but does not have a limit at a = 3. Thanks!
July 8, 2015

To Ms. Sue
Hey Ms. Sue! I've got a question How well do you know everybody's questions? Like how do you know everything? That's all I want to know.
May 19, 2015

English
craniectomy sounds weird. I'll have to go with this.
May 19, 2015

Calculus, derivatives
The curve is given by x^2+2r(sqrt(y))=xy What is dx/dr when y is constant?
May 8, 2015

Spanish
It looks cool of when you talk Spanish
May 2, 2015

Language Arts
It's A
May 1, 2015

math
a large piece of cadboard, 5cm by 8cm to be made by cutting out sqaures in each corner. find dimensions that will maximize the volume? vol= (8-2w)(5-2w) (w) answer= 1cm and 10/3 cm is this correct?
March 29, 2015

Calculus
1. Prove that, among all rectangles with fixed perimeter p, where p > 0, the largest in area is a square. 2. A 2 × 3 array of six congruent rectangular pigpens (that all look the same from above) will be in the overall shape of a rectangle R. We may use 100 feet of ...
March 27, 2015

math
Thanks!
March 17, 2015

math
Nolan practices the piano for 1 2/5 hours every Saturday and Sunday. How long does he practice each weekend? Express your answer in hours and minutes.
March 17, 2015

chemistry
Suppose a reaction has the equilibrium constant K = 2.3 10-7 at a particular temperature. Will there be a large or small amount of unreacted starting material present when this reaction reaches equilibrium? a)There will be a small amount of unreacted starting material present ...
March 15, 2015

math
F: 9 M: 13 L: 6
March 4, 2015

la check
which of the following is not a major point of view first person third person fourth person limited (THIS ONE)
February 24, 2015

Calculus
A spherical balloon with radius 3 inches is partially filled with water. If the water in the balloon is 4 inches deep at the deepest point, how much water is released when the balloon hits the wall and breaks?
February 18, 2015

physics
Tom has a mass of 67.2 kg and Sally has a mass of 58.5 kg. Tom and Sally are standing 23 m apart on a massless dance floor. Sally looks up and she sees Tom. She feels an attraction. If the attraction is gravitation, find its magnitude. Assume both can be replaced by spherical ...
January 24, 2015

Math
Theo drove a slow car 996 miles to Oregon last spring and used a total of 40 gallons of gasoline. what was the average miles driven per gallon of gasoline? Do I divide 40/996 to get this answer?
January 22, 2015

maths
find the turning points for the curve y=2x^3-1/2x^2-x+5. Determine the nature of the turning points. Appreciate your help
January 4, 2015

Physics
The windpipe of a whooping crane is about 1.27 m long. Assuming that the pipe is closed at one end, what is the fundamental frequency of this pipe? Answer in Hz and use 340 m/s for the speed of sound.
December 1, 2014

reading
1 amoral 2 amiable 3 epitome 4 encounter 5 malign 6 antagonist 7 absolve 8 animosity 9 adamant 10 eccentric
November 24, 2014

algebra
simplify the expression show your work 3x(4x^4-5x)
November 22, 2014

accounting
Starbucks-. Locate the company’s annual report as outlined previously. Find the company’s segment information; it should be in the “Notes to Consolidated Financial Statements” or other similarly named section. Look for the word “Segment” in a ...
November 20, 2014

physics
A spherical mirror is polished on both sides. When the concave side is used as a mirror, the magnification is +1.2. What is the magnification when the convex side is used as a mirror, the object remaining the same distance from the mirror?
November 6, 2014

physics
A car weighing 1.0 x 10^4N is parked on a 34 degree slope. The brakes fail and the car starts to slide down the hill. Assume no friction. Show your work, and determine a) the acceleration of the car, and b) after it has moved 28.0 m, how fast is it moving?
November 2, 2014

Math
5 + y/6=8
October 23, 2014

Algebra
I'm not getting it. I've tried to re-read the notes but I'm still confused. Label each statement as "true" or "false". If "false" correct the underlined portion. 1) If *|n+9| <_4,* then n+9>_ 4 and n +9_<4 2) If y-x <5-x ...
September 29, 2014

Chemistry
15.0 mL of 0.30 M sodium phosphate solution reacts with 20.0 mL of 0.23M lead(II) nitrate solution. What mass of precipitate will form?
September 28, 2014

Chemistry
A 55.29-g sample of Ba(OH)2 is dissolved in enough water to make 1.20 L of solution. How many milliliters of this solution must be diluted with water in order to make 1.00 L of 0.100 M Ba(OH)2? (Ignore significant figures for this problem.)
September 28, 2014

Chemistyr
A 55.29-g sample of Ba(OH)2 is dissolved in enough water to make 1.20 L of solution. How many milliliters of this solution must be diluted with water in order to make 1.00 L of 0.100 M Ba(OH)2? (Ignore significant figures for this problem.)
September 28, 2014

chemistry
What volume of a 0.550 M solution of potassium hydroxide can be made with 18.3 g of potassium hydroxide? (Ignore significant figures for this problem.)
September 28, 2014

Physics
A motorcyclist traveling 35.0 m/s realizes suddenly that he is headed straight for the edge of the Grand Canyon 50.0 m away. He immediately begins to brake, decreasing his speed at a rate of 7.00 m/s^2. With what velocity will he fly off into the canyon?
September 23, 2014

math
One cubic meter (1.00 m3) of aluminum has a mass of 2.70E+3kg, and 1.00m3 of silver has a mass of 1.05E+4kg. Find the radius of an aluminum sphere whose mass is the same as that of an silver sphere of radius 1.07cm.
September 7, 2014

chemistry
What type of chemical rxn is Na2SO4(aq) +Ba(NO3)2(aq) the product is BaSO4(s) + 2NaNO3(aq)?what is its net ionic equation?
September 3, 2014

Algebra
please help Solve the equation if possible -2|3y+7|+9=5
August 31, 2014

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