# Posts by paul

Total # Posts: 945

**history**

why did the romans reuild carthage after they destroyed it in the punic war(show the link )I have a test please help me

**history**

what event set precedence that alleviated the the problem of having on law of succession in the empire please help

**History**

what were at least 2 problem of drawbacks associated with the way the romans had their office of consul arranged (show me link to this)

**history**

name 2 of the previous names of the modern day city of istanbul (show me link to help me)

**Algebra**

I am preparing for a quiz and received a small guide (mini guide) over the weekend. So I have all the answers to the questions but I want to learn how to solve this specific problem: 2^(5/2)- 2^(3/2) and the answer is 2^(3/2). To clarify the numbers in the parentheses are ...

**Alg 2**

An account with annual compound, apr of 2% and an initial deposit of 224, after 535 years

**Math**

There were 93 students going to a nature camp. After equal groups of fewer than10 students , were formed for hiking, 2 students were left over . How many equal groups were formed?

**math**

how do i write 3474.8 in scientific notation

**geometry**

The slope of any line perpendicular to , where A(0, -3) and B(4, 9) are two points on the line, is m =

**chemistry**

Choices: True,False. Select all that are True. The pH at the equivalence point of a weak base with a strong acid is expected to be less than 7 because of the presentce of the conjugated acid in the water. One cannot prepare a buffer from a strong acid and its conjugated base, ...

**Help in Chemistry!!**

but what about water?

**Chemistry!!**

oh ok! i wasn't rounding, thank you.

**Chemistry!!**

i did that, but the answer is wrong.

**PHYSICS PLEASE HELP!!**

A radioactive nucleus at rest decays into a second nucleus, an electron, and a neutrino. The electron and neutrino are emitted at right angles and have momenta of 9.15×10−23 kg . m/s and 5.19×10−23 kg . m/s, respectively. 1.)What is the magnitude of the...

**physics**

A rocket is fired in deep space, where gravity is negligible. In the first second it ejects 1/160 of its mass as exhaust gas and has an acceleration of 15.1 m/s^2.What is the speed v_gas of the exhaust gas relative to the rocket?

**physics**

a 60 kg student jumps from a table 1.2m high. When his feet hit the floor he bends his knees so that the stopping time is .06s. What is the average force that the floor exerts on his body in order to stop him?

**Math**

Use the present value formula to compute the amount that should be set aside today to ensure a future value of $ 2,000 in 1 year if the interest rate is 12% annually, compounded annually. (a) $ 1,776.97 (b) $ 1,765.89 (c) $ 1,785.72 (d) $ 1,786.97 (e) $ 1,768.97

**Chemistry**

15 mL of 60oC water is mixed with 10 mL of 0oC water in a perfect calorimeter. What is the final temperature?

**sreet smarts**

when a person says whats up or dig it what do you say back

**business**

What are the disadvantages of using a contingent work force?

**physics**

if a bag weighing 9.4 kg is dropped 1m to someone below to catch,what is the total weight that the person would actually catch??

**physics**

Oh that's right sorry, if the 9.4kg bag drops 1m vertically, before someone cathces it, what weigth would they be catching??

**physics**

Oh that's right sorry, if the 9.4kg bag drops 1m, before someone cathces it, what would it weigh when they c

**physics**

a bag weighing 9.4kg is dropped 1m onto concrete, what is the impact force in kg

**Fluid Mechanics**

. A plate of mass M is suspended between two opposing jets, each of area A, velocity Vo and density . The plate is suddenly given a velocity Vo parallel to one of the jets. Determine the subsequent motion of the plate (x(t)), and the maximum displacement of the plate (...

**chemitry**

show that the equivalence amount of citric acid for 1.00g of sodium bicarbonate is 0.76g

**probability**

A dictionary contains 80,000 words, of which a certain student knows 30,000. If 100 of the 80,000 words are selected at random from the dictionary without replacement, find the probability:the student knows exactly 40 of the 100 words

**Physics**

yes, I added the vectors, of the charges. for a uniform line, E= kλ/R. Since the charge on the line is negative, it goes towards the line, and only has an x component of E= -12 kN/C. For the point charge, which is negative, E is away from the source, I got E=30.2 kN/C for...

**Physics**

An infinitely long line charge of uniform linear charge density λ = -3.00 µC/m lies parallel to the y axis at x = -2.00 m. A point charge of 4.70 µC is located at x = 1.50 m, y = 2.50 m. Find the electric field at x = 2.50 m, y = 2.00 m. I get 23.7 kN/C, why ...

**algebra**

true or false, Distributive property says that you can give out a factor to both numbers in a sum then add them together afterward

**Geometry**

Let x = acute angle 1 and 4x + 17 ext angle Let y = acute angle 2 and 6x + 23 ext angle x + 4x + 17 = 180 X=32.6 y =90-x = 90-32.6 = 57.4 4(32.6) + 17 = 147.4 Note: Cannot use x value for ext. 6x+23. Y is different acute angle. Vice versa.

**science**

a can potatoes has the following data: recall 4-9system carbs=22 fat is 10 grams and protien is 13 find the percentage of each if the calories = 275

**chemistry**

A student estimated the volume of liquid in a beaker as 200 mL. When she poured the liquid into a graduated cylinder, she measured the volume as 216 mL. What is the percent error of the estimated volume from the beaker, taking the measurement in the graduated cylinder as the ...

**History**

Is it a false statement to say that every single group of people who have wished to establish their independence and their own individuality from a corrupt form of government will eventually succeed at doing so? Like with segregration and everything and like i don't know ...

**math pre-algebra**

1.x/4+2=1 2.-3+x/1=-3 please show steps thanks

**math**

x/4+2=1 -3+x/1=-3 please show steps thanks

**math**

2-4n=10 please show how you get the answer thanks

**math**

-3+x/1=-3

**spanish**

Form complete sentences using the information provided. Use indirect object pronouns and the present tense of the verbs Javier / prestar / el abrigo / a Gabriel

**grammar**

circle the words that have the long a or e sound stream stem let man plains saw land late calm text breed endless play part flat

**geometry**

i don't know!!!

**phsics**

A drag racer, starting from rest, speeds up for 402 m with an acceleration of +16.0 m/s2. A parachute then opens, slowing the car down with an acceleration of -5.60 m/s2. How fast is the racer moving 2.90 102 m after the parachute opens?

**math**

in a class of 28 sixth graders , all but one of the students are 12 years old. which two data measurements are the same for the student's ages? What are those measurements?

**Spanish**

Yes I understand. I kept saying the two options out loud. What I was confused was, I thought choice a meant, "Good, you pay tomorrow." But I'm starting to understand the meaning behind attaching "te" behind pagar. I had trouble understanding this ...

**Spanish**

Yo te puedo pagar manana. (accent on n) Would the response be a. Bueno, pagate manana. (accent on a and n) b. No, pagame ahora mismo. (accent on a) And can you explain why? Gracias

**Spanish**

I always thought Ustedes meant "they." I've also heard it as "you all (plural)". So when a question being given has the Uds. conjugation of the infinitive, are we suppose to answer back in the Uds. form or nosotros form? For example: A que hora van a ...

**Environmental Science**

If global energy policies lead to stabilisation of CO2 concentrations at 660 p.p.m., what would the resulting increase in GMST be (to one decimal place)? In subsequent parts of the question this is referred to as the UN’s ‘de facto temperature target’

**science**

how many seconds you will reached the distance of 200 m. if your acceleration at 2m/s/s?

**science**

how far you will move in 20 seconds if your acceleration at 2m/s/s?

**science**

what is the velocity of a body moves from rest moves the distance of 10 m. and acceleration 2 m/s/s?

**prime factiozation**

i am 25 years old and i need to the find the lcm of 15 years and 30 years

**Math**

A chemistry teacher needs 2.5 liters of a sulfuric acid solution that is 20% sulfuric acid and 80% water . He has 2 liters of a 15% sulfuric acid solutionleft over from earlier laboratory exercises. He also has 44 liters of a 50% solution. Let x represent the number of liters ...

**Math**

correct

**math**

the volume of a container that is 8" long 4" long and3' high is _cu in. please help

**math**

a 22" diameter circle has an area of_sq in.

**math**

dy/dx=2/27(x-3)√((x^2-6x+23)/y)

**Physics**

Find the fg y component because that is equal to the "n" in the equation: F(static friction) = mu x n

**calculus**

Hello drwls. Please can you explain how you get 72sqrt2+c. Surely, if it is 50.911=50.911+c, if one subtracts either side c=0? Am I missing something?Thank you for your help.

**calculus**

Please help. I have an implicit answer to a differential equation of 18y*sqrt(y)=(2(x^2-6x+23)^3/2)/3 plus arbitrary constant. What is the particular solution to this for which y=2 when x=1. And then express this particular solution answer in an explicit form. Please help and ...

**calculus**

Please help. How do I separate the variables in the following differential equation dy/dx=(2/27)(x-3)then square root (x^2-6x+23)/y where (y>0). Then give general solution in implicit form. Thank you so much if you can help.

**litres and millilitres**

1/10L=ml

**Math**

Solve for x. 3^(2x)-2*3^(x+5)+3^10= 0

**calculus**

let R be the region bounded by the x-axis, the graph of y=sqrt(x+1), and the line x=3. Find the area of the region R

**Science/Math**

We have 30 grams of clay. We understand that Density=Mass/Volume. We understand that the Density of water is 1.0 and in order for the clay boat to float in the water Density needs to be less than 1.0. So my question is using 30 grams of clay what design will allow me to hold ...

**chemistry**

Is it possible to calculate the value of the solubility product constant without being given any concentrations?

**Compound math**

$24,000 is invested for 5 years with APR of 2% in daily compounding.What is the balance in account after 5 years?

**business**

How did U.S. manufacturers become vulnerable to offshore outsourcing? Give examples to support your answers.

**Chemistry**

Write a net ionic equation and calculate K for the reaction in aq between acidic acid and sodium hydroxide. Given Ka (acidic acid) = 1.8 x 10^-5

**social studies**

Ads that rely on the testimonials of people who have used the product are using what technique?

**Science**

Hello van some one show me how to draw a dot and cross diagramm for 1 lithium atom and 1 fluorine atom(Lif) and also a diagram for 1 magnesium atom and 1 oxygen atom (MgO) Thankyou Paul.

**chemistry**

What is the molarity of Cl− ions at the stoi- chiometric point? Answer in units of mol/L.

**chemistry**

How do I calculate 50ml of a 50mM sodium momophosphate buffer solution

**Chemistry**

The maximum solubility of silver sulfate, Ag2SO4 [molar mass = 312], is 4.50 g/L at 25°C. Silver sulfate dissociates by the reaction below: Ag2SO4(s) <--> 2 Ag+ (aq)+ SO4¯² (aq) 1.What are the [Ag+] and [SO4¯²] in a saturated solution of silver ...

**Physics**

A car travels 12 km north from oakville, then 8.0 km westto springfield .what is the magnitude of the displacement of a helicopter that travels directly from oakville to springfield

**Trigonometry**

Can you verify this identity? cos(4x)cos(2x)= (1/2)[cos8x+cos2x]

**Math**

Oh, I think I got it. Are the answers (-15,18) and (1,2)?

**Math**

At what points does the line y+x-3=0 intersect the curve 2y=6x+2(x^2)-(y^2)?

**physics**

A body of mass 8kg is move a distance of 10m with an acceleration of 6m/sec^2.express the work done in producing the acceleration?

**Physics**

thank you so much!

**Physics**

I am a little confused about kinetic and potential energy regarding roller coasters. I understand that the first hill has to be the highest to gain the potential energy (PE). I hope someone can help with this example I just made up to help me understand: 1st Hill: 50 m from ...

**Chemistry**

A student titrates 0.100M KOH into 50.00 ml of weak acid HX. The pH of the solution is 4.25 after 20.00 ml of the base has been added, and equivalence point is reached when 40.00 ml of the base is added. 1. What is the concentration of the acid, HX ? 2. What is the Ka value of...

**Physics**

A bus starts from rest at a bus stop and accelerates at a rate of 1.12 m/s^2 for 11.0s. It runs at constant speed for 80.0 s and slows at a rate 1.20 m/s^2 until it stops at the next bus stop. (a) What is the maximum speed attained. (b) Find the total distance covered.

**math**

Rail earns 10% commission on each guitar and 15% commission on each keyboard he sells. In two week he sold 5 guitars that cost$260 each and 2 keyboards that costv$420 each. How much commission did he earn on these seven items?

**gr. 12 biology**

My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity respectively (seconds obviously, these are the times it took the enzyme to react...

**gr. 12 biology**

My teacher wants me to calculate the rate of enzyme activity (1/s) I'm given the temperatures: 0 , 15, 30, ,50, and 80 (degrees celsius) AND the times 8.74, 18.83, 14.30, 34.22, and infinity respectively (seconds obviously, these are the times it took the enzyme to react...

**Math**

Suppose that y≤5x,3x≤y and 14x+15y≤1 together with 0≤x, 0≤y. The maximum value of the function y+x on the resulting region occurs at x=? and y=? The maximum value of the function is ?

**physic**

If the work required to speed up a car from 13 km/h to 20 km/h is 6.5×103 J, what would be the work required to increase the car’s speed from 20 km/h to 35 km/h?

**Physics**

I can't figure this question out. If there are three weights attached to the corners of an equilateral triangle with side length 10 cm Measured from the bottom left corner, what is the center of mass of this object if M1 = 0.1 kg, M2 = 0.2 kg, and M3 = 0.3 kg?

**Chem**

What is the pressure in a 2.00 L container which holds 0.100 mol of methane and and 0.200 mol of carbon dioxide at standard temperature?

**Physics**

Calculate the magnitude of the potential difference between points a and b in the figure if R1=2.36 Ù, R2=4.29 Ù,and R3=10.08 Ù.

**Chemistry**

What is the pressure in a 2.00 L container which holds 0.100 mol of methane and and 0.200 mol of carbon dioxide at standard temperature?

**Chemistry- Drbob-help#3**

Thanks I understand now what I did wrong you have been a big help.

**Chemistry- Drbob-help#3**

I still need help with #3 I'm not sure how I got 1.14M. I have tried to do the problem over, but I not coming up with my original answer of 1.14M. Somehow I am missing a step. Please show work for the 1.14M Thanks Question#9 reads exactly as written. A student makes a ...

**Chemistry- Drbob-help**

I have placed the answer I got please help. A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 870mL 2. Calculate the % ...

**chemistry**

How much NH3 can be produce from 20 liter 32,5 wt%(NH2)2CO (urea) aqueous solution. The reaction path way is : (NH2)2CO +H2O= 2NH3+ CO2 Thanx

**Chemistry**

A student dissolves 18.9 grams of Zn(NO3)2 [molar mass = 189] in enough water to make 500.0 of solution. A 100.0 ml portion of this solution is diluted to 1000.0 ml.What is the [NO3¯ ] in the second solution? A) 0.0100M B) 0.0200M C) 0.0300M D) 0.0400M E) 0.0500M

**Chemistry**

A student dissolves 18.9 grams of Zn(NO3)2 [molar mass = 189] in enough water to make 500.0 of solution. A 100.0 ml portion of this solution is diluted to 1000.0 ml.What is the [NO3¯ ] in the second solution? A) 0.0100M B) 0.0200M C) 0.0300M D) 0.0400M E) 0.0500M

**Math**

The reduced row echelon form of the matrix -1/2 1/2 3/2 -3/2 2 3/2 1/2 -3/2 9/2 is?

**Math**

The reduced row echelon form of the matrix -1/2 1/2 3/2 -3/2 2 3/2 1/2 -3/2 9/2 is?

**Chemistry**

A student makes a solution by dissolving 55.8 grams of potassium hydroxide in 875.0 grams of water. The resulting solution has a density of 1.07 grams per milliliter. 1. What is the volume of this solution? 2. Calculate the % concentration of this solution. 3. Calculate the ...