# Posts by J

Total # Posts: 1,069

j
What were the factors that played a significant role in the collapse of Russian control over Eastern Europe?

arithmetic
How do I solve these questions? 3 1/3 - 2 2/5= 2.75 + .003 + .158 = 7/20 is equal to ? What is the value of the expression 2x2+ 3xy – 4y2 when x = 2 and y = - 4? 16x - 8 = If 2x – 3(x + 4) = - 5, then x = – 3(5 – 6) – 4(2 – 3) =

Calculus
find lim f(x) - lim f(x) x->infinity x->-infinity if f(x)=ln (x+sqrt[x^2+a^2])/(x+sqrt[x^2+b^2]) a and b are real numbers

Calculus
find lim f(x) - lim f(x)

Physical Science
If a person is traveling at a rate of seventy five miles per hour in a straight line, how far would they travel in three seconds?

Physics
A watch manufacturer claims that its watches gain or lose no more than 8s in a year.

comm

comm

comm

comm
this is the reason why getting a credit card at a young age is not a great idea because you get anxious and want to buy a lot of things when you know you don't have the money.

comm
yes i do need help

comm
i need help identify adjectives and adverbs:My dad added me as an extra card holder on his credit cards. I was very excited that I could purchase products now and pay for them later. I didn’t realize how much money I was spending. He came over to my house recently, ...

physics
Okay, I have an example problem that I'm trying to solve that comes with the answer; I'm just trying to figure out what to do. A man jogs at a speed of 1.8 m/s. His dog waits 2 s and then takes off running at a speed of 4 m/s to catch the man. How far will they have ...

Conductivity
you are amazing!

Physics
239

history
Who were some of the original Texas Wildcatters?

physics pleaaaaaaaaaaaaaaaaaaaaaaaaaaaaaase I need
Consider a square ABCD of side 10cm and total mass 10kg. Let O be the center of the sqaure. We cut a square of corners O and C. Find the central mass of the obtained shape after removing the small cutten sqaure. I appreciate your help. thank you

math/ physics
Consider a square ABCD of side 10cm and total mass 10kg. Let O be the center of the sqaure. We cut a square of corners O and C. Find the central mass of the obtained shape after removing the small cutten sqaure. I would appreciate your help. thank you

algebra
2y-6x=8 2y=6x+8 y=3x+4 please explain this to me

math
i was shown example: x+6=-5 6=-5 6--5=x x=-11 please explain to me how they got this

world history
What are some characteristics of Greek civilizations?

Physics
TH/TC=(1)/(1-0.308)

Math Finite
0.2442

physics
your so stupider than me if you donts know hows to do this problam!

Europe
what is the most important advantage og having germany in the European Union?

Chemistry
-q = dH ( dH = change in enthalpy Kj/mol) Use q=mc(Tf-Ti) and then convert to deltaH q=mc(Tf-Ti) q =? c= 4.814 J/g*C use specific heat of water since its in aqueous sol and we are not told differently m= total mass= mass KBr + mass water mass KBr= 5.0 g *mass of water from ...

math
Hmm 12 is already an even number! Hence you should not count 12 twice, therefore answer should be 7/15. :)

social studies
Hi majenta, In my view a thesis statement is only good if it is properly justified. In this case, you have to clarify what you mean by "important" - which may be subjective (different people may interpret it differently) as well as rather broad. So like what I think ...

holy name university
Hi january, Dalton's Law of partial pressures states that P(total) = P(1) + P(2) + P(3) +....+ P(n) where 1, 2 and 3 are gases in the mixture. So applying the law 150kPa = 100kPa + 24kPa + P(oxygen) Hope I helped! (: -J

chemistry
Oops, sorry, my apologies for typing in caps. Was just trying to point that out. :)

chemistry
Hi faye, Alright so we want to prepare a 800ml solution of 0.15M concentration. So first we calculate the amount of Ca(OH)2 **NOTE: SHOULD NOT BE CA(OH) COS +2 CHARGE OF CA2+ IS NOT BALANCED! CA(OH)2 IS A SOLID AND NOT AN ION, HENCE THE COMPOUND CANNOT HAVE AN OVERALL CHARGE...

Chemistry
Hi Lindsay, Alright, to begin with, since this is an organic compound, we identify the functional group. [-C(=O)-NH- means its an amide] So when you hydrolyse an amide, you are breaking the (amide) bond between C=O and N-H, and you add water because its a hydrolysis (OH- goes ...

chem class
Hi laney, For this question, it would be appropriate for you to ask yourself.. what is present in the solution after mixing? KOH is a strong basic salt while HCL is a strong acidic salt. KOH + HCL --> KCL + H2O Note that amount of KOH = HCL = 0.125 X (50/1000), so there is ...

chemistry
Hi roseanne, First, we write out the equation when MX2 dissolves in water (or a suitable solvent): MX2 --> (reversible arrow) M2+ + 2X- So Ksp = [M2+][X-]^2 Solubility would refer to the concentration of an ion produced in 1:1 ratio with the original solid. In this case, we...

Hey Tara, Hmm, I'm not too sure about this question, but I'd guess it has something to do with the following formula: G = G(not)+ RTlnQ So basically G(not) = -67.4 kJ R= 0.008314 kJ mol^-1 K^-1.(molar gas constant)(Note that units must be kJ to match up with the G(not...

physics
Hi sweetie, As a coconut is falling down, the only force acting on it is the gravitational force (its weight) if you neglect air resistance. So as it is accelerating as it falls, velocity ______. P.E. of coconut = mgh, where m = mass of coconut, and h = height of coconut above...

physics
Hi sweetie, momentum = mass (kg) X velocity (m/sec). So for 1) At rest, velocity = 0m/sec. So momentum should be.... (Apply formula above) [Ans:0 kgm/sec] for 2) At that final state, velocity = 30m/sec. So momentum should be.... (Apply formula above) [Ans: 90,000kgm/sec] for 3...

chemistry
Hi Tara, To find out if a reaction is spontaneous, we calculate E(cell). If E(cell)>0, reaction is spontaneous. If E(cell)<0, reaction is not spontaneous. If E(cell)=0, reaction will proceed until equilibrium is established. So in this case, E(cell) = E(reduction)-E(...

maths
Oops sorry! I realised that I also made a mistake near the end. When I said "...Therefore, 24x=98cm.." I meant 14x (Not 24!) = 98cm. =)

maths
Hi aisha, Let's start with formulating an algebriac expression for the perimeter. We know that perimeter of rectangle = 2(length) + 2(width). Since we don't know length or width, we let x be the width of the rectangle. Hence length = 5x-3 [because length = (5 X width...

chemistry
Hi Tara, Alright, by convention, we usually write [Oxidation]/[Reduction]in notation. Hence, the oxidation half-cell is the Cr/Cr3+ half-cell while the reduction half-cell is the Ni2+/Ni half-cell. [Alternatively, you can compare E(not) values such that the half-cell with the ...

chemistry
That comes from multiplying 3X10^-8 and 0.0385 when we expand 3X10^-8(0.0385-x).

chemistry
Hiya, From what you said it seems that you understand everything up till "x = [H+]= 3.4 x 10^-5 M" So we know that 3X10^-8 = x^2/(0.0385-x) Bring (0.0385-x) over to the left hand side, Hence 3X10^-8(0.0385-x) = x^2 Then we expand the left hand side, 1.155X10^-9 - ...

HUM176
Newspapers, once available only in print, have evolved into 24-hour multimedia operations. In addition to newspapers, briefly describe the evolution of movies, television, Internet, books and magazines, and media companies throughout the last century.

algebra
(6*5)/3 is this a true sentence

Probabilities
1.) two marbles are drawn without replacement from a bowl containing seven red, four blue, and nine yellow marbles. what is the probability that at least one is red? 2.)a card is drawn from a standard deck of 52 cards. what is the probability that the card is neither a four or...

Probabilities
1.) two marbles are drawn without replacement from a bowl containing seven red, four blue, and nine yellow marbles. what is the probability that at least one is red? 2.)a card is drawn from a standard deck of 52 cards. what is the probability that the card is neither a four or...

AP Chem
66 kJ/mol

chemistry
could someone please still explain? and explain how the 4.74 pH was found? thanks

chemistry
couple someone please still explain? and explain how the 4.74 pH was found? thanks

Social Studies
name if the following involve, seperation in powers, checks and balances, judicial review, federalism, or some combination of these principles, and say why A) the state law requires that a prayer be said each day in public schools. The courts rule that law wiolates a first ...

Calculus 2
I am having so many problems with these volume problems, 1. Find the volume of a the solid obtained by rotating the region enclosed by: x = 2y and y^3 = x with y>0 about the x axis 2.Find the volume of cone of height h = 250 and a circular base with radius r = 150 First ...

physics
A horizontal spring, resting on a frictionless tabletop, is stretched 14 from its unstretched configuration and a 1.00- mass is attached to it. The system is released from rest. A fraction of a second later, the spring finds itself compressed 3.6 from its unstretched ...

Social Studies
I need help making an MLA works cited. i have 3 sources... they are all newspaper articles that i found online. someone please help me

tangential speed and accelerations
A helicoptor bladehas an angular speed of 6.50 rev/s and has an angular acceleration of 1.30 rev/s. point 1 on the blade is 3.00m and point 2 is 6.7m. Can you find the speeds of A) the tangential speeds and B) the tangential accelerations?

physics
a truck is traveling to the right and slowing down. If we define a positive displacement to be motion to the right, the truck has...What Velocity and acceleration?

physics
What average power is required for a runner with a mass of 80 kg to reach a speed of 8.2 m/s during a time of 1.8 s?

chemistry
Lithium metal dissolves in water to yield hydrogen gas and aqueous lithium hydroxide. What is the final concentration of hydroxide ions when 5.500 g of lithium metal is dropped into 750. mL of water?

chemistry
You need to prepare 500.00 mL of a 0.25 M solution of nitric acid . Concentrated nitric acid comes from the chemical copmanies as a 15.8 M liquid. How much (in mL) of this 15.8 M solution will you need to dilute to 500.00 mL to get the desired 0.25 M solution?

english
Is this a better present tense sentence? I think education is a very important role in successful financial planning. And is THINK the verb?

english
Is this past perfect I had never studied financing until I signed up for college.

english
Would this sentence be past simple tense or past perfect tense? I learned how to create a financial plan and to budget money in my class.

english
What verb tense would this sentence be? I am learning so much about financial planning in my personal finance class.

English
Is this a present tense verb sentence? I believe education is a very important role in successful financial planning

English
what is the proper verb tense? With an education i will be able to find a better job?

college
what is the proper verb tense in the sentence below? With an education i will be able to find a better job?

college
I need to write 5 sentences showing the verb and its tense. The sentences need to be about the role of education in sucessful financial planning. I am so confused

physics
7.69 m/s

College Physics
a horizontal speed of 15.8 m/s and a vertical speed 10.0 m/s upward. What is the vertical speed 1.12 s later?

algebra
solve for v: p = mv explain how to get the answer and what the answer is please

algebra
solve for d: s= d/t HELP EXPLAIN HOW TO DO THIS PLEASE

algebra
solve for m: F = ma someone tell me how to do this please!!!!!

algebra
will someone tell me what the answer is to this problem? and how they got the answer? SO CONFUSED solve for x: y = mx + b

icp
Charge q is 1 unit of distance away from the source charge S. Charge p is six times further away. The force exerted between S and q is _____ the force exerted between S and p.

physics
Thanks guys!

physics
A 4kg object is subjected to two forces, F1=2Ni-3Nj, and F2=4Ni-11Nj. The object is at rest at the origin at t=0. What is the objects acceleration? I know you use F=m*a Do you add the two F vectors together & take the square root to find the sum of F? ex: Fnet=6Ni-14Nj & then ...

Physics
A wooden boxcar is moving along a straight railroad track at speed v1. A sniper fires a bullet (initial speed v2) at it from a high-powered rifle. The bullet passes though both lengthwise walls of the car, its entrance and exit holes being exactly opposite each as viewed from...

math
The diameters of ball bearings produced in a manufacturing process can be described using a uniform distribution over the interval 2.5 to 8.5 millimeters. What is the probability that a randomly selected ball bearing has a diameter less than 4.5 millimeters? a.0.38, b.0.28, c....

math
Write and solve an equation to model the situation: two friends are renting an apartment. they pay the landlord the first months rent. the landlord also requires them to pay an additional half of a month's rent for a security deposit. the total amount they pay the landlord...

math
5-x-x=-1 will someone please tell me how do do this problem?

physics
A steam catapult launches a jet aircraft (from rest) from the aircraft carrier John C. Stennis, giving it a speed of 160 mi/h in 2.40 s. Find the average acceleration of the plane. Assuming that the acceleration is constant, find the distance the plane moves.

physics
A truck covers 40.0 m in 7.00 s while smoothly slowing down to a final velocity of 2.45 m/s. Find the truck's original speed. Find its acceleration.

physics
original speed and acceleration

physics
A truck covers 40.0 m in 7.00 s while smoothly slowing down to a final velocity of 2.45 m/s.

physics
A certain car is capable of accelerating at a rate of +0.90 m/s2. How long does it take for this car to go from a speed of 35 mi/h to a speed of 70 mi/h?

spanish
Que te gusta hacer? Will someone give me some possible answers for this question?

physics
A certain car is capable of accelerating at a rate of +0.50 m/s2. How long does it take for this car to go from a speed of 45 mi/h to a speed of 85 mi/h?

spanish
what does "contesta estas preguntas sobre ti, tu familia, y tus amigos" mean. does it mean answer the questions about yourself, your family, and your friends? does that mean i have to have 3 sentances for each question.

chemistry
Describe how to prepare 1 liter of 0.5N solution of HCl from concentrated HCl. H=1, Cl=35.5, spgr=1.19, 37.2%

science
How many ml of concetrated HCl are required to make 2 liters of 3N HCl from concentrated HCl that is 37% w/v and has a specific gravity of 1.2. H=1 Cl=35.5

chemistry
How do I convert 10 g CaCl2 to CaCl2.10H2O?

chemistry
You wish to prepare a 10% CaCl2 solution. Only CaCl2 * 10H2O is availalbe. How many grams of the hydrated compound are required for 250ml of the reagent? Ca=40 Cl=35.5

chemistry
How do i convert g CaCl2 to g CaCl2*H2O?

chemistry
500ml of 0.1M CaCl2 is required for protimes. How many grams of CaCl2 * H2O should you weight out?

math
Still confused. How do you write out the linear range of a set of data points. R=???

math
I have a graph plotted which makes a straight line (linear graph) The points are as follows X , Y (.25, 0.593) (.50, 1.161) (.75, 1.762) (1.0, 2.348) I need to determine the linear range. Also, can Beer's Law be applied?

College Math
farmer wishes to fence a rectangular area along the river bank. No fence is required on the side adjacent to the river. The material for the fence costs P16.00 per meter for the side parallel to the river, P12.00 per meter for the side perpendicular to the river. The farmer ...

Math
You need to replace the molding around a floor that is 15 ft. long & 23 ft. 6 in. wide. The molding sells for \$0.50 per ft.. How much will the molding cost?

math problem
(-1)(.999)+(99)(.001)+(49)(1/999)+(49)(1/998)+(49)(1/997)=-.75

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