Tuesday
October 21, 2014

Posts by jake


Total # Posts: 1,751

Math (Calculus AB)
An equation to the graph of y=x^3+3x^2+2 at its point of inflection is: a) y=-3x+1 b)y=-3x-7 c)y=x+5 d)y=3x+1 e)y=3x+7 Please help. I am in urgent need.
January 24, 2011

Math (Calculus AB)
For x≠0, the slope of the tangent to y=xcosx equals zero whenever: (a) tanx=-x (b) tanx=1/x (c) sinx=x (d) cosx=x Please help. I have a final tomorrow and I am working diligently to understand every type of problem that may show up on my test. Thank you very much.
January 24, 2011

Math (Calculus AB)
For x≠0, the slope of the tangent to y=xcosx equals zero whenever: (a) tanx=-x (b) tanx=1/x (c) sinx=x (d) cosx=x Please help. I have a final tomorrow and I am working diligently to understand every type of problem that may show up on my test. Thank you very much.
January 24, 2011

Physics
that is easy actually..... d(distance)= 1/2at^2 +v(initial)t, where a-acceleration, t-time. v-initial here is 0 because the car starts from rest....so d= 1/2at^2 which is .5(3.5)(3.6^2)...which comes out to 22.68m I believe
January 24, 2011

reading
What's the question then? It doesn't say the question, how are we supposed to help?
January 22, 2011

Math
Find the value of the constant t such that the triangle formed by A (2,2) ,B (4,-5) ,C (6,t) is right angled at B(4,-5).
January 21, 2011

english
take the first definiton then double the consanant you idiot
January 19, 2011

physics
a 2kg mallet is dropped from a height of .6m onto a nail, driving it 3.5 cm into the wood. What is the average force exerted by the mallet on the nail? thanks
January 19, 2011

geometry
In triangle abc, ab=5 bc=9 and ac=8 Choose the angle measures from greatest to least
January 19, 2011

math
Camilla has 3 times as many points as Lynn. Lynn has 5 more points than Kim. Camilla, Lynn, and Kim combined have twice as many points as Jasmine. If Jasmine has 25 points - how many points do the three other girls have?
January 17, 2011

Social Studies
how did helen thomas feel about watergate? if u could also tell me where u found the answer that would help, thanks
January 17, 2011

Nuclear Physics
If a polonium-210 (Po-210) atom has just decayed, how close can the ejected alpha particle get to a neighboring Po-210 nucleus? Hint: W = F*r F=kq1q2/r2
January 16, 2011

chemistry
I got E) for the first and couldn't figure out the other one. Can any one verify the first and help with the second?? In which of the following processes is there a decrease in the potential energy of the substances involved? A) a coil spring is compressed B) two ...
January 13, 2011

chemistry
I got E) for the first and couldn't figure out the other one. Can any one verify the first and help with the second?? In which of the following processes is there a decrease in the potential energy of the substances involved? A) a coil spring is compressed B) two particles...
January 13, 2011

algebra
Tom's mother pays him $.50 for each problem his gets correct on his test, but he has to give her .25 for each problem he gets wrong. If Tom makes $8.00 on the test, and there were 25 total problems on the test, how many did he answer correctly? Thanks!
January 11, 2011

physics
How much potential energy does a 20-kg barrel have when it is in the truck whose floor is 5.0 m above the ground?
January 7, 2011

Geometry
In right triangle ABC, the median to the hypotenuse has length 15 units and the altitude to the hypotenuse has length 12 units. What is the legth of the shorter leg of triangle ABC?
January 6, 2011

science
based on the relationship between mass and volume.... How much space would 75 grams of water occupy?
January 6, 2011

chemistry
suppose you have an unknown gas, and wish to determine whether it may be ammonia, hydrogen or carbon dioxide. Describe tests you might use to prove the existence of each of these gases.
December 16, 2010

Physics
A train sounds its horn as it approaches an intersection. The horn can just be heard at a level of 42 dB by an observer 10 km away. (a) What is the average power generated by the horn? W (b) What intensity level of the horn's sound is observed by someone waiting at an ...
December 13, 2010

chemistry
what is the wavelength of an electron traveling at 1.65% of the speed of light?
December 10, 2010

8th grade
An alloy of metals is 25% copper .Another alloy is 50% copper. How much of each alloy should be used to make 1000grams of an alloy that is 45% copper?
December 9, 2010

chemistry
The strongest intermolecular forces present in a sample of pure I2 are A. covalent bonds. B. covalent network bonds. C. metallic bonds. D. dipole–dipole forces. E. London forces.
December 9, 2010

Geometry
Given:JG/HG =KG/IG, ∠1 ≅∠2 Prove: EF ll HI /Users/szeringue/Documents/#6.doc
December 9, 2010

Chemistry
The normal boiling point of a liquid is A. the temperature at which all three phases are in equilibrium. B. the only temperature at which there can be equilibrium between the liquid and gas states. C. the temperature at which the vapor pressure equals 760 mmHg. D. the ...
December 9, 2010

Chemistry
All of the following are postulates of the kinetic molecular theory of gases except A. The gas molecules are in constant motion. B. The gas molecules are in rapid motion. C. The collisions between molecules are elastic. D. At a constant temperature, each molecule has the same ...
December 9, 2010

Chemistry
Which of the following compounds has the highest vapor pressure at 25°C? A. CH3CH2OH B. CH3OCH3 C. CH3CH2CH2Cl D. CH3CH2CH3 E. CH3CH2CH2CH
December 9, 2010

GenChemistry
Exposure to high doses of microwaves can cause tissue damage. Estimate how many photons with a wavelength = 12cm, must be absorbed to raise the temperature of your eye by 3.0 deg C. Assume the mass of the eye is 11g and its specific heat is 4.0 J/gK
December 8, 2010

Chemistry
CaO(s) + 3C(s) > CaC2(s) + CO(g) deltaHrxn = +464.8 kJ/mol-rxn Is the reaction endothermic or exothermic? What is the enthalpy change if 10.0 g of CaO is allowed to react with an excess of carbon?
December 8, 2010

Physics
The A string of a violin is 31 cm long between fixed points with a fundamental frequency of 440 Hz and a mass per unit length of 5.8×10^−4 kg/m. What are the wave speed in the string? What are the tension in the string? What is the length of the tube of a simple ...
December 7, 2010

Chemistry
Write a nuclear equation for the following: Iodine 131 undergoes beta decay two times Plutonium 239 is an alpha emitter Th 234 undergoes beta decay once and then alpha decay How do I go about writing nuclear equations?
December 6, 2010

Chemistry
Calculate the energy changes associated with each of the following reactions. Label each as endothermic or exothermic. A.) 2(C2H2)+5(O2)------->4(CO2)+2(H2O) B.) N2+O2------>2(NO) C.) NH3+H2O----->NH4OH D.) 2(BrCl)----->Br2+Cl2
December 6, 2010

algebra
K*T=K*T I need help solving for T. How would I do it?
December 5, 2010

algebra
K*T=K*T How would I solve for T?
December 5, 2010

10th grade
how do you calculate the volume of the aluminum block from the apparent change in the volume of water in the cylinder?
December 3, 2010

Physics
The intensity of an earthquake wave passing through the Earth is measured to be 2.5×106 J/m^2 at a distance of 48 km from the source. What was its intensity when it passed a point only 2.0 km from the source? At what rate did energy pass through an area of 3.0 m^2 at 2.0...
December 2, 2010

Geometry Please Help
/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?
December 2, 2010

Geometry Please Help
/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?
December 2, 2010

Geometry
/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?
December 2, 2010

Geometry
/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?
December 2, 2010

chemistry
One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g); ΔH°= –87.9 kJ How much heat is liberated at constant pressure if 0.416 g of iron reacts with 42.0 mL of 0.457 M HCl?
December 2, 2010

college chemistry
Consider the following metals. Metal Specific Heat copper 0.385 J/(g · °C) magnesium 1.02 J/(g · °C) mercury 0.138 J/(g · °C) silver 0.237 J/(g · °C) lead 0.129 J/(g · °C) If the same amount of heat is added to 25.0 g of ...
December 2, 2010

chemistry
From the following information, determine ΔH°f of malonic acid, CH2(COOH)2(s). CH2(COOH)2(s) + 2O2(g) → 3CO2(g) + 2H2O(l); ΔH° = –861.0 kJ Substance ΔH°f (kJ/mol) CO2(g) –393.5 H2O(l) –285.8 A. 2613.1 kJ B. –1540.3 kJ C. &#...
December 2, 2010

English
you're correct
December 1, 2010

physical science
what is non convective rain?
December 1, 2010

math
due to it's shape
December 1, 2010

Algebra
try using the quadradic formula!
December 1, 2010

Consumer Math
1. You are debating about whether to buy a new computer for $800.00 or a refurbished computer with the same equipment for $640.00. If a savings account earns 4.5% APR interest, how much do you really save with a refurbished computer if you put the difference into the savings ...
December 1, 2010

Chemistry
Write the balanced equation and solubility product expression for the solubility equilibrium of Mn3(PO4)2: i thought the answer was Mn3(PO4)2 (s) = Mn^2+(aq) + (PO4)2 ^3- (aq) but thats not right. then for the Ksp expression i thought it was [Mn^2+] [PO4]^2
December 1, 2010

Chemistry
Write the balanced equation and solubility product expression for the solubility equilibrium of Mn3(PO4)2: i thought the answer was Mn3(PO4)2 (s) = Mn^2+(aq) + (PO4)2 ^3- (aq) but thats not right. then for the Ksp expression i thought it was [Mn^2+] [PO4]^2
November 30, 2010

Math
What is the inverse of f(x) = x^2 − 7, x ≤ 0
November 30, 2010

chemistry
The net ionic equations for the following 1. Dissolution of silver oxalate with nitric acid 2. Complexation of the iron(III) by the thiocyanate ion 3. Precipitation of the carbonate ion with barium ion 4. precipitation of the oxalate ion with barium ion 5. precipitation of the...
November 30, 2010

Math
for what values of _ is 2,3_1 divisible by 9? by 3?
November 29, 2010

math
f(x) = -x squared + 1 for x= -3
November 28, 2010

physics
A wave with frequency 11.3Hz and amplitude 48.1 mm moves in the positive x direction with a speed of 5.6 m/s. What is the waves wavelength?
November 27, 2010

physics
A wave with frequency 11.3Hz and amplitude 48.1 mm moves in the positive x direction with a speed of 5.6 m/s. What is the waves wavelength?
November 27, 2010

Physics
If I'm travelling with a bag of objects on the seat next to me and I turn right, which direction does the bag fall and why? What does this have to do with friction, centripetal and inertia
November 22, 2010

physics
what is the SI unit for torque? :)
November 18, 2010

college chemistry
To dilute a solution from 0.600 M to 0.100 M, the final volume must be A. 1/6 the original volume. B. 0.7 L. C. More information is needed to answer this question. D. 6 times the original volume. E. 60 L.
November 18, 2010

8th grade math
6z
November 13, 2010

Kinsesiology
Which actually are the muscles of the hip?
November 13, 2010

chemistry
What is the net ionic equation for the reaction of formic acid, HCOOH, with NH3? A. H+(aq) + NH3(aq) → NH4+(aq) B. H+(aq) + OH–(aq) → H2O(l) C. HCOOH(aq) + NH3(aq) → NH4+(aq) + HCOO–(aq) D. HCOO–(aq) + H+(aq) + NH3(aq) → NH4HCOO(aq) E. ...
November 10, 2010

chemistry
thanks!
November 7, 2010

chemistry
Which two orbitals from CV+ and –OH will overlap creating the C-O bond in CVOH? Which of the following accurately shows the orbital interaction that leads to bond formation between CV+ and –OH?
November 7, 2010

MATH INTEREST
IT'S OKAY MY CAPS LOCK IS BROKEN TOO
November 7, 2010

College Chemistry
When 20.0 g C2H6 and 60.0 g O2 react to form CO2 and H2O, how many grams of water are formed?
November 4, 2010

English
They are arguing about rules and regulations again. I have to identify the adverb. again
November 3, 2010

chemistry 1A
If 0.2178 g of a diprotic solid acid is neutralized by 44.81 mL of 0.0953 M NaOH, calculate the molar mass of the solid acid
November 2, 2010

English
For my essay I have to write about a character in Middlemarch by George Eliot and explain how the character is brought to life. How does she (the author) introduce, develop, and represent the character? I'm thinking about writing about Dorothea or Causabon, but I have no ...
November 1, 2010

English
For my essay I have to write about a character in Middlemarch by George Eliot and explain how the character is brought to life. How does she (the author) introduce, develop, and represent the character? I'm thinking about writing about Dorothea or Causabon, but I have no ...
November 1, 2010

Word within the Word Analogy Help
Butt
November 1, 2010

SOCIAL STUDIES
WHAT 2 AQUIFERS PROVIDE THE WATER SUPPLY TO HALF THE PEOPLE IN NJ
October 31, 2010

SOCIAL STUDIES
WHAT IS THE SOURCE OF THE DELAWARE RIVER IN NJ?
October 31, 2010

English
For my english class we had to make a list of things that annoy us and we have to do a log entry that "select hits" and develop some clusters. Like i know cluster refers to groups, so things like traffic and red lights can be grouped together (driving), but i dont ...
October 30, 2010

math
calculate the discriminant of 3x^2 - 4x + 2
October 30, 2010

chem buffer
A & D
October 29, 2010

Kennard Dale
Estimate what the value of G would need to be if you could actually "feel" yourself gravitationally attracted to someone near you. Assume that each person has a mass of 72 kg, the force of attraction is F = 4 N, and the distance of separation is 0.5 m.
October 28, 2010

math
tony is making flower arrangements. he is using 3 different kinds of flowers-roses, daisies, and tulips. each arrangement will have the same number of each kind of flower. he figures that if he uses all the flowers, the greatest number of arrangements he can make is 7. he has ...
October 28, 2010

Psychology
What is an advantage and disadvantage of the Incentive Motivational Theory in Psych?
October 27, 2010

English
Is the infinitive "to use" used as an adjective in this sentence: "In your opinion, what is the easiest word-processing program (to use)?
October 20, 2010

English
Is the infinitive "to use" used as an adjective in this sentence: "in your opinion, what is the easiest word-processing program (to use)?
October 20, 2010

Physics
A car drives straight off the edge of a cliff that is 58 m high. The police at the scene of the accident note that the point of impact is 126 m from the base of the cliff. How fast was the car traveling when it went over the cliff?
October 20, 2010

Physics
you should get 272m/s
October 20, 2010

Physics
sqrt(270^2)+(39.8^2)
October 20, 2010

algebra
5g+4(-5+3g)=1-g my solve(which didnt work tried 5 times) 5g-20+12g=1-g 17g-20=1-g 18g-20=1 18g=21 g=21/18=7/6 where did i go wrong?
October 19, 2010

chemistry
A coin dealer, offered a rare silver coin, suspected that it might be a counterfeit nickel copy. The dealer heated the coin, which weighed 14.0 g to 100°C in boiling water and then dropped the hot coin into 29.5 g of water at T = 15.0°C in an insulated coffee-cup, and ...
October 19, 2010

college chemistry
Use standard enthalpies of formation to determine ƒ¢Horxn for: 2NH3(g) + 3O2(g) + 2CH4(g) ¨ 2HCN(g) + 6H2O(g) in kilojoules. Find the change in internal energy for this reaction in kJ
October 18, 2010

English
The best way to get there is to take the bus. In this sentence is the infinitive phrase "to take" an adjective?
October 18, 2010

Physics
Yeah dude! that is a good question!
October 12, 2010

Foreign Languges
This is some Greek and Latin root words for my 6th grade gifted homework. Whats the difference between medicus and medicinal?
October 8, 2010

5th grade math
I'm in 6th grade and I've never heard of this.
October 8, 2010

physics
An object is thrown vertically upward with a speed of 22.4 m/s. How high does it rise?
October 7, 2010

Physics
An arrow is launched vertically upward from a crossbow at 98.2 m/s. Ignoring air friction, what is its instantaneous speed at the end of 10.0 s of flight? What is its average speed up to that moment? How high has it risen? What is its instantaneous acceleration 4.20 s into the...
October 6, 2010

Physics..help please
A rifle with a weight of 35 N fires a 4.0 g bullet with a speed of 250 m/s. (a) Find the recoil speed of the rifle. ___m/s (b) If a 700 N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle. ___m/s
October 6, 2010

Physics..help please
A 715 N man stands in the middle of a frozen pond of radius 10.0 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 1.2 kg physics textbook horizontally toward the north shore at a ...
October 6, 2010

music
How has Islam shaped conceptions of music for the peoples of the Middle East? I would rather a specific answer instead of saying using wikipedia. Thank you
October 5, 2010

Music
How has Islam shaped conceptions of music for the peoples of the Middle East? I would rather a specific answer instead of saying using wikipedia. Thank you
October 4, 2010

Chemistry
How do I find the radius of a sulfide ion?
September 24, 2010

Chemistry
I used coulomb's law to find the force of attraction between the ionic atoms in BeS and BeO. For BeS, F = -6.85x10^29 J/m For BeO, F = -9.078x10^29 J/m Which has the stronger force of attraction? BeO? What does the "-" sign mean?
September 23, 2010

chemistry
Is it true that the greater difference in electronegativity in an ionic compound, the greater attraction between the elements in the compound?
September 23, 2010

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