Saturday
February 6, 2016

Posts by jonathan

Total # Posts: 344

physics
A(n) 3.46 g bullet is fired into a(n) 2.4 kg ballistic pendulum and becomes embedded in it. The acceleration of gravity is 9.8 m/s2 . If the pendulum rises a vertical distance of 7.13 cm, calculate the initial speed of the bullet.
October 27, 2010

algebra
6 dollars for 8 cans of vegtables
October 26, 2010

4th grade
What is the different between reptiles and amphibians?
October 25, 2010

physics
A daredevil jumps a canyon 10.6 m wide. To do so, he drives a car up a 19° incline. (The daredevil lands on the other side of the canyon at the same elevation as takeoff.) What minimum speed must he achieve to clear the canyon?
October 21, 2010

physics
A daredevil jumps a canyon 10.6 m wide. To do so, he drives a car up a 19° incline. (The daredevil lands on the other side of the canyon at the same elevation as takeoff.) What minimum speed must he achieve to clear the canyon?
October 21, 2010

algebra
Graph -2y-3x>4
October 15, 2010

Writing / History
Compare And Contrast Rosa Parks And Jehan Sadat i need help
October 14, 2010

Science
60kg
October 6, 2010

math
The book says it's 3..
October 5, 2010

math
5-(t+3)=-1+2(t+3) I don't know how to do it. I need help going over the steps
October 5, 2010

Math
I did this problem for homework so here is my homework lol but remember DONT COPY THAT IS AGAINST THE LAW! So I know the problem or question it is asking is “How many videos would you have to rent each month to make a membership worth investment?” and thats the gist ...
September 29, 2010

Music
That doesn't help I am still confused
September 12, 2010

Music
How is FOLK music different from CLASSICAL music in South Asia?
September 12, 2010

math
thank you
September 11, 2010

math
3c=12
September 11, 2010

math
21
September 11, 2010

math
solve algebraically x^2 - 2y^2 = 11 y = x + 1
September 6, 2010

logarithms
Ive been staring at this problem for like a half hour now and I cant figure out where to even begin... log(base x)4 + log(base 8)squareroot(x) = 4/3 solve for x any help appreciated
August 11, 2010

algebra 2
that didn't simplify anything... it says that x=ln(1/5)/ln2
August 10, 2010

algebra 2
find the points of intersection of the following algebraically y=2^x + 4^x y=2^x+1 - 4^x+1 I set them equal to each other but not sure if you use logs or what to solve it
August 10, 2010

Science
deeznuts
June 30, 2010

Chemistry
The density of mercury is 13.54 g/cm3. Suppose you need 40 gm of mercury for an experiment. What volume of mercury do you need? A)2.95 cm3 B)541.60 cm3 C)26.46 cm3
June 2, 2010

Physical Science
If 30 N of force is exerted over an area of 20 m2, how much pressure is being applied in pascals?
May 31, 2010

math
the Angle of Elevation From a Ship to the Top of a Lighthouse on the Shore is 18 Degrees. If the Light House is 20 Meters Tall and at Sea Level How Far is the Ship From the Shore to the Nearest Meter..
May 31, 2010

calculus
lim x¨‡ 2x 3 +5x 2 −x 3 =
May 26, 2010

algebra honers (math)
he was assaulted
April 26, 2010

11th grade
4root(3X>7)(y>9)(z>3)
April 23, 2010

algebra
simplify: 4root3x>7*Y>9*Z>3
April 23, 2010

SCIENCE
SUNLIGHT AND WIND ARE INEXHAUSTIBLE RESOURCES. EXPLAIN WHY THEY ARENT USED TO PRODUCED ALL OF OUR ENGERY
April 21, 2010

SCIENCE
SUNLIGHT AND WIND ARE INEXHAUSTIBLE RESOURCES. EXPLAIN WHY THEY ARENT USED TO PRODUCED ALL OF OUR ENGERY
April 21, 2010

Organic Chemistry
What is the white solid that quickly forms when the methyl salicylate is added to the sodium hydroxide solution? I know that it is this equation but I wanted to know what is the name of the white solid: HOC6H4COOCH3 + NaOH „³ HOC6H4COO- Na+ + CH3OH
April 3, 2010

physics
You have a bathtub containing 100 ml of water at 25 degrees celcius. How long must you stir the water to bring the temperature of the water to 100 degrees celcius?
March 24, 2010

11th grade
1.44x 10^25 atoms c X 1 mol C / 6.02 x 10^23 atoms C = Type in calc. The atoms cancel out and you have moles =).
March 12, 2010

Math
How would I find the formual of power function out of these 2 point? (5,75)(10,600)
March 12, 2010

Physics
I've been working on this problem for quite some time now and still can not figure it out... Initially, both metal spheres are neutral. In a charging process, 1 × 1013 electrons are removed from one metal sphere and placed on a second sphere. Then the electrical ...
February 16, 2010

Physics
I tried using 1E13 as q1 and -1.6E-19 as q2, and I still got it wrong...
February 16, 2010

Physics
Initially, both metal spheres are neutral. In a charging process, 1 × 1013 electrons are removed from one metal sphere and placed on a second sphere. Then the electrical poten- tial energy associated with the two spheres is found to be −0.061 J . The Coulomb ...
February 16, 2010

physics
PLEASE EXPLAIN A charge moves a distance of 1.7 cm in the direction of a uniform electric field having a magnitude of 200 N/C. The electrical potential energy of the charge decreases by 9.69095 × 10−19 J as it moves. Find the magnitude of the charge on the moving ...
February 16, 2010

Physics
PLEASE HELP WITH AS MANY AS POSSIBLE... I AM TERRIBLY CONFUSED. 1. A charge moves a distance of 1.7 cm in the direction of a uniform electric field having a magnitude of 200 N/C. The electrical potential energy of the charge decreases by 9.69095 × 10−19 J as it ...
February 16, 2010

economics
Suppose that the consumption function is C=100+.8(y-t). Initially investment and government expendtures are I=75 and G=150 and taxes are T=50. 1.Depict this economy using the keynesian cross. calulate the initial equilibrium income. how much will income increas if government ...
February 6, 2010

Biology
Please help me list some of the major differences in the process of mitosis as it occurs in higher plants and as it occurs animals.
February 5, 2010

Math
Gilda ran a 26-mile marathon. About how far would her sister have to swim to use the same number of Calories Gilda used during the marathon?
February 2, 2010

Advanced Functions
you did it right up until: t = log(920/314) = 0.465, I have no idea how you got those numbers but it's t(log(1.05/.92))=log(1000/300) t(log(1.1141304348)=log(3.3(rpt.)) t(0.057401472)=0.522878745 t=(0.522878745)/(0.057401472) t=9.1092
January 4, 2010

7th grade math
what is the constant in th
December 16, 2009

Math - Pre- Clac
Ok thanks, I did make a typo my bad.
December 14, 2009

Math - Pre- Clac
Prove that each of these equations is an identity. A) (1 + sinx + cos x)/(1 + sinx + cosx)=(1 + cosx)/sinx B) (1 + sinx + cosx)/(1 - sinx + cosx)= (1 + sin x)/cosx Please and thankyou!
December 14, 2009

Math
The sum of John's age and twice of his son's age is 56. In 8 years time, the son's age will be half of john's age. Find there present ages. Right now I wrote down an equation x+2y=56 and not quite sure what to do next.
October 31, 2009

Math
if a^2-b^2=10 and a-b=2 what is the vlaue of a+b
July 9, 2009

science
what are some interesting facts about the sun?
May 11, 2009

science
Why should you visit the sun? what is special about it?
May 11, 2009

science
where is the sun located.
May 11, 2009

Government.
The main reason why the Constitution dealt specifically with the crime of treason was that: A. The framers wanted to prevent all treason in order to protect the democracy. B. Treason was not considered a serious crime before the Constitution was written. C. Treason was a crime...
April 21, 2009

genology
well they find a way to get close to the valcanoe
February 14, 2009

genology
well they
February 14, 2009

science
word containing the word rock with ice only
January 5, 2009

Economics
Pls advise.. The max units of good A is 180 The max units of good B is 60 In general terms, what happens to the opportunity cost of good A as the output of good A increases? In general terms, what happens to the opportunity cost of good B as the output of good B increases?
December 16, 2008

MATH
X-4=3x+12 X=? please help
December 9, 2008

rudcing fractions
10 100
October 25, 2008

physics/math
A car moves at 12 m/s and coast up a hill with a uniform acceleration of -1.6 m/s^2..What is its displacment after 6 sec.? What is its displacment after 9 sec.?
October 20, 2008

math
how do i find the raidis of a sphere? sa= 36*22/7 in sq
October 16, 2008

Macroeconomics
I have an assignment question regarding the impact of reducing the government's budget deficit by reducing government purchases. I have to develop a S/D graph with curves to illustrate this impact. I know that when the government makes purchases and runs a deficit, supply ...
October 2, 2008

Math!!!
kk ty bro
September 27, 2008

Math!!!
A=(-7,-18),B=(3,y),C=(x,6) and the slope of the line=3/5 x=? y=?
September 27, 2008

math
using the terms factor,divisor,multiple,product,and divisible by,write as many statements as you can about the number sentence 4x7=28.
September 15, 2008

Math - Factors
using the terms factor,divisor,multiple,product,and divisible by,write as many statements as you can about the number sentence 4x7=28.
September 10, 2008

math
5x+1=6 x=?
September 4, 2008

Math
Do i mulitply the equation my 5,3?
August 23, 2008

Math
One-third the sum of a number N and 5 is 2 more than one-fifth the sum of N and 3. N= ?
August 23, 2008

PreCalc
What is the real solutions of this equation? sqrt(2x+3)-sqrt(x+2)=2
August 16, 2008

Math
thank you!
July 26, 2008

Math
When a rock is put into a tank full of water, water is displaced and is collected by a container. If the base of that container is 12cm x 15cm and the water level is 4.5 cm, what is the volume of the rock?
July 26, 2008

Redox Half Reactions
Half reaction of 2 Al2O3 + 3 C → 4 Al + 3 CO2
May 24, 2008

Aluminium Bauxite (is water needed)
Is water needed in the extraction of aluminium from bauxite in either the Bayer or Hall-Heroult proccesses? Please reply as soon as you can :) hehe
April 20, 2008

Maths
i knew that was wrong, coz my answer should be in the 50's haha..thanks though, great help can i ask how you got sinA and sinB with that information :) no point in me just copying it i would like to know how you got it
April 17, 2008

Maths
well, i got: (-4/5)(12/13) - (4/5)(7/13) therefore (-48/65) - (28/65) therefore: answer = (-76/65)
April 17, 2008

Maths
yeah thats right, can u go on?
April 17, 2008

Maths
if cosA = 4/5; sin <0; cosB = 12/13; 0<B<90, determine sin(A-B) thanks ... :)
April 17, 2008

Science
I desperatly need help, i need to know everything there is to know about the recovery of ALUMINIUM that is recovered from BAUXITE ORE, the process, the cost, everything. Please, if you have any knowledge or know of any GOOD webpages, please post them here. thanks:)
April 17, 2008

science
What is the difference between RNA and DNA that can be used to separate them from one another?
April 9, 2008

Math
Factorise: a)x squared - 5x b)x squared - 81
April 7, 2008

geography
name at least two state capitals that have two or more words in their names
April 2, 2008

Chemistry
What are compunds that are composed of molecules called?
March 12, 2008

Chemistry
The nuclide 12 N 7 is unstable. What type of radioactive decay would be expected??? my guess is either gamma or beta. are either of those correct?
March 4, 2008

Nuc. Chem
Oh okay so for this one would it be: 40 Ar 18???? thanks so much for your help!
March 4, 2008

Nuc. Chem
HELP!!! I have like 20 of these kinds of questions on my homework and no clue how to solve them. Electron capture transforms 40 K 19 into what nuclide?!?! Thank you
March 4, 2008

Trig word problem
A park ranger at point A sights a redwood tree at point B at an angle 23 degrees from a fire tower at point C, From the fire tower, the Angle between the ranger and the tree is 123 degrees. If the ranger at point A is 2.3 miles from the fire tower at point C, how far is it ...
February 24, 2008

trigonometry
In triangle ABC, a=8, b=15, and m<C=40 degrees. Find the area of the triangle to one decimal place.
February 24, 2008

trig WORD PROBLEM
A park ranger at point A sights a redwood tree at point B at an angle 23 degrees from a fire tower at point C, From the fire tower, the Angle between the ranger and the tree is 123 degrees. If the ranger at point A is 2.3 miles from the fire tower at point C, how far is it ...
February 24, 2008

trig
In triangle ABC, find <A to the nearest tength of a degree is m<B=95 degrees , b=15.4, a=8.0
February 24, 2008

trig
Two ships, one sailing at 30 km/hr and the other at 45 km/hr, left port at the same time. Three hours later they were 120 km apart. If you had to find the angle between their courses an equation that could be used to solve this problem is:
February 24, 2008

pre algebra
2x+3y=6 2x=6-3y [subtract 3y to solve for x] x=(6-3y)2 [divide by 2 to get x by itself] 2x+3y=6 3y=6-2x [subtract2x to solve for y] y=(6-2x)/3 [divide by 3 to get y by itself]
February 24, 2008

CHEMISTRY
could you please check my work? thanks. For the reaction between reactants A and B below, if 4.925 moles of A is placed into a flask with excess B it is found that the amount of A remaining after 6.85 seconds is 2.737 moles. 2A (g) + B (g)-----> 3 C (g) a. find the rate of ...
February 21, 2008

science
nucleotide monomers a nucleotide is composed of: A Nitrogenous Base (purine or pyrimidine) A Five-Carbon Sugar A Phosphate Group
February 20, 2008

Chem Urgent!
the atomic mass in the periodic table represents the number of grams per one mol of lead. so there are 207.1 g per mol of lead.
February 20, 2008

French
oui, partager [the infinitive of partage] means share.
February 20, 2008

AP CHEM-URGENT PLEASE
could you please check my work? thanks. For the reaction between reactants A and B below, if 4.925 moles of A is placed into a flask with excess B it is found that the amount of A remaining after 6.85 seconds is 2.737 moles. 2A (g) + B (g)-----> 3 C (g) a. find the rate of ...
February 20, 2008

Chemistry
HELP! we just started kinetics and i have no clue how to solve this problem. For the reaction between reactants A and B below, if 4.925 moles of A is placed into a flask with excess B it is found that the amount of A remaining after 6.85 seconds is 2.737 moles. 2A (g) + B (g...
February 20, 2008

Chemistry
thanks!
February 14, 2008

Chemistry
why does the value of i (van t' hoff factor) change with regards to theoretical vs. experimental? i'm not quite sure what happens but i know it has to do with ions in the solution. could it be attractive forces between ions?
February 14, 2008

CHEMISTRY
thank you so much! the molar mass was a major problem...i didn't realize i was so off. thank you for pointing that out.
February 14, 2008

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