Wednesday
July 30, 2014

Posts by Jaden


Total # Posts: 92

algebra
How do you solve -5(a-2)-2

Science
An oxygen ion has 8 protons and 6 electrons. What is its charge in coulombs?

Math
The Puzzle: Here is a famous prize problem that Sam Loyd issued in 1882, offering $1000 as a prize for the best answer showing how to arrange the seven figures and the eight 'dots' .4.5.6.7.8.9.0. which would add up to 82

math
a quadrilateral has angles measuring 27, 56, and 80. what does the fourth angle measure?

Physics
An antiproton (same mass as the proton, charge -e) is at the observation location. What is the force on the antiproton, due to the π-?

Phyics
A π- ("pi-minus") particle, which has charge -e, is at location ‹ 3.00e10-9, -2.00e10-9, -3.00e10-9› m. What is the electric field at location < -3.00e10-9, 3.00e10-9, 4.00e10-9> m, due to the π- particle?

physics
A package of mass 9 kg sits at the equator of an airless asteroid of mass 4.0 1020 kg and radius 4.9 105 m. We want to launch the package in such a way that it will never come back, and when it is very far from the asteroid it will be traveling with speed 185 m/s. We have a la...

trigonometry
If sin 57=m then express the following questions 1. Sin 237 2. cos 33 3. cos 3 4. cos 66

Chemistry
Explain, not just describe, the relationship between these rankings. Most reactive to least reactive metals: Zn, Pb, Cu, Ag Most reactive to least reactive metal cations: Ag, Cu, Pb, Zn

Chemistry equation
Write a correctly balanced series of chemical equations to describe the stepwise protonation of carbonate ion. Na2CO3 with HCl

Chemistry eq
How many milliliters of 0.430M hydrochloric acid (HCl(aq)) must be added to 15.00mL of 0.682M sodium hydroxide (NaOH(aq)) to reach the equivalence point?

Chemistry eq
How many milliliters of 0.430M hydrochloric acid (HCl(aq)) must be added to 15.00mL of 0.682M sodium hydroxide (NaOH(aq)) to reach the equivalence point?

Chemistry titrations
25.00mL of an unknown sulfuric acid solution is titrated to the second equivalence point with 21.02mL of 0.420M potassium hydroxide solution. What is the concentration of the sulfuric acid solution?

Chemistry
How many mols of OH-(aq) ions are present in 20.33mL of 1.33M sodium hydroxide solution?

Chemistry
How many mols of tyrosinate ions (C9H10NO3-(aq)) are present in 909mg of sodium tyrosinate solid (NaC9H10NO3)?

Chemistry
What is the difference between a forward and a reverse reaction? I am studying Lechatelier's principal and it states that with an increase in temperature it favors a reverse reaction and when the temperature decreases it favors a forward reaction. What does this mean exactly?

chemistry concentrations
You have combined the following: 7.92mL of 1.122M Fe(NO3)3(aq), 5.02mL of 1.849M NaCl(aq), and 7.09mL of water. What is the concentration of chloride ions in the resulting solution? Assume liquid volumes are additive

Chemistry
The dye molecule 7-aminocoumarin has an extinction coefficient of 2800M-1cm-1 at 432nm. An aqueous sample of 7-aminocoumarin is placed in a cuvette with a 1.00cm path length and the absorbance is found to be 1.75 at 432nm. What is the molarity of 7-aminocoumarin in this sample?

Calculus
F(x) = -6x^8 F'(x)= y= 7e^x + 2 y' =

Chemistry
Which are within 10% of 4.63mins? 4.13 5.28 5.02 4.23

Chemistry
What is the concentration of methanol in a solution prepared by combining 7.85mL of a 3.693M methanol solution with 17.50mL of water? Assume volumes are additive and report your answer to 3 decimal places.

Chemistry
If the freezing point of pure toluene is -95.15 oC and its freezing point depression constant is -8.38 oC/molal, what is the freezing point of a solution made by dissolving 39.338g of anthracene (C14H10) in 150.0mL of toluene? (Density of toluene = 0.8669g/mL)

Math
write 3 different ones.numbers you could add to where you need to regroup to find the sum

Chemistry
Can you explain how to convert mols of each of the reactants to mols of Ca3(PO4)2 more please?

Chemistry
How many grams of calcium phosphate (precipitate) could be produced by combining 12.096g of calcium nitrate dissolved in water with 16.498g of rubidium phosphate dissolved in water? Report your answer to 3 decimal places.

Chemistry
How many grams of calcium phosphate (precipitate) could be produced by combining 12.443g of calcium nitrate dissolved in water with 16.083g of rubidium phosphate dissolved in water? Report your answer to 3 decimal places.

Physics
Andre at 60 kg, hits the trampoline after falling from 4 meters. The trampoline stretches 0.6 meters and andre stops in 0.3 seconds.What is the force constant of the trampoline?

Math I need help Ms. Sue please answer!
144 = 2 * 2 * 2 * 2 * 3 * 3 2 to the 4th power and 3 to the 2nd power.

3rd grade math
Well, if you subtract by adding, you count in your head how many numbers are between 36 and 71. For example.. 80-50, there are 30 numbers in between 50 and 80 and 80-50=30.. If its easier.. try taking away one number in your equation and making them even.. like 70 - 35 and cou...

algebra
can't figure it out yet let me know how it goes

math
If a translation maps point (3, 2) to (4, 5); or T : (3, 2) (4, 5), indicate the image for (2, 4).

business
five secific events that can be expected to cause the equilibrium price of a good to increase?

algebra
perform the indicated operation and simplify: 3x+6 x^2-4 ----- divided by ----- 4x+12 x-3

physics
I know that 1 micro-coulomb is 1*10^-6 coulombs and 1 electron has 1.60217646 * 10-19 coulombs. I'm not sure if you have to divide or multiply them? And don't you need the mass of the carpet to do it? My answers on true/false; False, it does depend on the magnitude of ...

physics
You pick up a charge of one micro-Coulomb while walking over carpet, how many electrons were transferred? (Order of magnitude only) TRUE OR FALSE: If a third charge is released in the middle between the two positive charges, independent of the magnitude of the charges, it will...

4th grade
what grade are all of you in like high school or collage you know i never got math intil now . do any of you like math?

4th grade
which of the 5 regions contain rich farmland in Arkansas and Louisiana created by Mississippi and Red Rivers?

Chemistry
Assuming complete dissociation of the solute, how many grams of KNO3 must be added to 275 mL of water to produce a solution that freezes at -14.5 C? The freezing point for pure water is 0.0 C and Kf is equal to 1.86 C/m. * Use Tf = Kf*i*m

government
why isnt there a political party dedicated to labor class in the U.S? a. proves politicians arent concerned about serving working class. b. result of govt restrictions on political activities of labor unions c. reflects diffictulties in unifying a party on single issue winner ...

government
what can political parties handle better than interest groups? a. raising money b. provide solidary benefits c. create a cleare ideology d. organize people on a large scale

question of the day at my school
Welsey W. south

question of the day at my school
Who was the host of AM chicago in 1963?

science
thank you

science
Why are models useful? a) models work exactly like the things they present b) Models are the first stage in any experiment c) models are better than charts or graphs d) models are the first step in creating a prototype

sciencew
Yes, I copied it correctly. Water is nonliving because it cannot make itself move. Thank you Ms. Sue

sciencew
Scientists know that water is nonliving because a) it gets energy from food b) it reproduces itself c) it responds to its environment d) it cannot make itself move Is d the answer?

science
Scientists know that water is nonliving because a) it gets energy from food b) it reproduces itself c) it responds to its environment d) it cannot make itself move I think letter c but I'm uncertain. Thanks

science
Thanks Dr.Bob222

science
One of Darren's model cars keeps rolling off its track. The other cars stays on the track. What should he do? a) change the shape of the track b)study the wheels of the car that will not stay on the track c)change the tires on all of the cars d)build a model of the cars an...

science
Thank you Lori and Nadia

science
Question 1: Candance is trying to explain that a dog is a living thing, but a river is not. What is one difference that will help her show this? a)a river cannot make another river b)both the dog and the river can move c)a river can be made by people, but the dog can only be m...

government
thanks

government
do republicans think the government is too strong or too weak?

Calculus
annnnd.... a)1/2pi b) 10pi c) 24pi d) 54pi e) 108pi

Calculus
The volume of a cone of radius r and height h is given by V=1/3pir^2h. If the radius and the height both increase at a constant rate of 1/2 centimeter per second, at what rate, in cubic centimeters per second, is the volume increasing when the height is 9 centimeter and the ra...

Math
Thanks Ms. Sue!

Math
Are these correct? two more than a number and four = 2 + n + 4 ten more than a number plus 3 = n + 10 + 3 three increased by a number minus 5 = n + 3 - 5 six and a number decreased by 7 = n+6-7

Math
Thanks Ms. Sue, that's what I thought but I was not sure.

Math
Directions: Write an expression for each of the following. Use n for the unknown number Questions: four less than a number a number increased by the same number I am confused, thanks!

Science
THANK YOU DR. BOB222

Science
What do simple machines do? I can't unscramble these letters to get the answer: pldkwoohsrue

biology
thanks

biology
why has surprisingly little use been made of distillation of seawater as a source of driking water in arid areas?

chemistry
How many grams are there in 25 moles of sodium oxalate? Please explain step by step. I'm confused.

physics
thanks

physics
please help with either or both 1. a charge of 10C is passing in 2 second through a cross sectional area of a conductor. calculate the intensity of magnetic field at a distance of 10 cm from the conductor. 2. An amount of 3X10^20 electrons is passing in a conductor in 2 ms. ca...

physics HELP
is it D?

physics HELP
which unit is equivalent to meters per second? a. hz*s b. hz*m c. s/hz d. m/hz

physics
bluelight wavelength in vacuum 480nm, index of refraction is 1.6 what is the index of refraction in vacuum?

trig
how do i solve tan(165) and sin(285)

1st grade social studies
cultural/heritage

physics
im talking about sound waves

physics
1.if frequency increases twice, how it change the energy carried by one pulse? (It may have no effect) 2. if the humidity of the air increased, what quantities will be affected: frequency, period, speed, and wavelength

physics
oooh...sorry I meant to write 89.0 dB

physics
a very loud train whistle has an acoustic power output of 100 W. if the sound energy spreads our spherically, what is the intensity level in dB at a distance of 100 meters from the train? I0=10^(-12) the answer is 200 m but how do i get it?

Math
Can someone check my answers for me pls? True or False LCM of 10 and 18 is 180; False LCM of 8 and 30 is 120; True LCM of 3 and 4 is 12; True LCM of 42 and 28 is 168; True LCM of 9 and 15 is 45; True

Physics
A 0.145-kg ball, moving in the positive direction at 13 m/s, is acted on by the impulse. What is the ball's speed at 4.0 seconds?

math
simplify the expression sqrt(5/3)

Algebra2
Can someone check my answer for me. List all the possible rational zeros of f(x)= 3x^5-7x^3+2x-15 p=15 1,3,5,15 q=3 1,3 answer: 1,3,5,15,1/3,1/5,3/5

Chemistry
How do I find the total vapor pressure of a solution of benzene (mole fraction 0.350, vapor pressure at 25 degrees = 12.7 kPa) in toluene at 25 degrees. (vapor pressure of toluene at 25 degrees = 3.79 kPa)

math (sales tax)
A necklace from Target costs $3.75. The sales tax rate is 5.75%. What is the total cost?

Economics
I'm writing an essay on what I think is the most important issue facing the global economy. Would a good topic be the economic development in certain nations? The phase "economic development in certain nations" is both vague and too broad. You must keep your mind...

Government
Please critique my Introduction paragraph for my essay I changed the last sentence to make a better arguement................-In the 1981 Supreme Court Case of Rostker vs. Goldberg the debate was weather women should be included in any future draft registration. In the end the...

Government
I'm writing an essay on the Supreme Court case of Rostker vs. Goldberg(1981) I have to describe the case, talk about if I agree or diagree with the outcome and explain why or why not.I'm not very good at writing introductions but could any critique me on what I have so...

Government
Why does the Constitution allow the Federal Government to levy taxes? I'm not quite sure as to why but would the answer be that the Constitution allows the federal government to levy taxes because of Congress? http://www.jiskha.com/display.cgi?id=1181953733 Your question w...

Government
Why does the Constitution allow the Federal Government to levy taxes? Reading Article 1, Section 8 in the Constitution my answer should be that the Constitutio does not allow the Federal Government to levy taxes but gives that power to Congress?...right? Congress is one of the...

History
What was the greatest foreign policy victory for the Carter Administration? http://www.google.com/search?q=president+carter+foreign+policy&rls=com.microsoft:en-us:IE-SearchBox&ie=UTF-8&oe=UTF-8&sourceid=ie7&rlz=1I7SUNA The first four links in these results seem to be most prom...

History
What was the significance of Winston Churchill's speech in 1946 in Fulton, Missouri? Is that the famous Iron Curtain speech? http://en.wikipedia.org/wiki/Fulton%2C_Missouri Yes -- Iron Curtain speech. =) Would it be that in the "Iron Curtain speech" Winston Churc...

History
What was the concept of Popular Sovereignty as it was used in the years leading up to the Civil War? Popular sovereignty left the question of slavery in the territories up to the settlers. http://www.infoplease.com/ce6/history/A0839723.html

history
what is the concept of judicial review? and why is it so important Thank yoy for using the Jiskha Homework Help Forum. Here are some places to visit: 1. http://en.wikipedia.org/wiki/Judicial_review 2. http://www.constitutioncenter.org/explore/BasicGoverningPrinciples/JudicialR...

Social Studies
What was a major result of the Civil War on the US? The Union was preserved as a single country, and slavery was abolished. Is that major enough? In addition to the answers drwls gave, you might consider the total change of America's status in the world. REconstruction was...

Social Studies
need website that can help in social studies and has study materials THNX :) http://www.kidport.com/REFLIB/UsaHistory/AmericanRevolution/AmerRevolution.htm Here's one. If you'll be more specific about the topic and maybe the publisher, we can find more information. =) ...

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