Wednesday
December 7, 2016

# Posts by paul

Total # Posts: 923

Math
John wants to make brownies. To make brownies he needs 2/5 of a cup of flour per batch of brownies.if John has 2 cups of flour, then how many batches of brownies can John make?
November 20, 2016

physics (urgent)
A flywheel with a moment of inertia of 1.00kg m^2 is rotating at 100 rpm. What torque is required to bring it to rest in 10.0 revolutions?
November 5, 2016

math (Help)
Determine whether the equation defines y as a linear function of x. If so, write it in the form y = mx + b. 6x+√y-7=0 a. y=-6x-7 b. y=-6x+7 c. y=6x d. y is not a linear function of x
October 17, 2016

Physics
A 70 kg waterslide rider traveling at 15 meters per second hits a ramp with a 58 degree launch angle - How high will they fly?
October 11, 2016

Algebra
The bongo family has three children, including a pair of twins. The third child is 3 years younger than the twins. The sum of the three ages is 42. How old is each?
September 25, 2016

calculus
a ladder 10m long is leaning against a vertical wall with its other end on the ground. the top end of the ladder is sliding down the wall , when the top end is 6m from the ground it is sliding down at 2m/sec. how fast is the bottom moving away from the wall at this instant?
September 22, 2016

Physics (Momentum and collusion)
Two balls of equal mass undergo a collision. Ball one is initially travelling horizontally with a speed of 10 m/s, ball two is initially at rest. After the collision, ball one moves away with a velocity of 4.7 m/s at an angle of 60 degrees from it's original path and ball ...
September 6, 2016

stat
A college basketball player scored the following points in the 37 games he played his senior year: Stem-and-leaf of points n = 37 Leaf Unit = 1.0 1|33 1|66 2|1233444 2|5555666789 3|0222233444 3|89 4|23 4|7 5|2 The first quartile of his point totals is ____________ points
September 4, 2016

math
One-half of a number plus three-fourths of the number is 2 more than four-thirds of the number. find the number .
August 21, 2016

Math
How far will a 4ft diameter wheel travel while making 100 revolution?
July 20, 2016

Math
95 is the product of vidya's savings and 5
July 16, 2016

Physics
“A rifle shot with a velocity of 270m/s at a target that is 400m away.if the shooter wants to directly hit target and what angle he must gire
July 10, 2016

regents
The issue is that i am moving to the U.S , but thanks anyways.
June 8, 2016

regents
I have to take the Regents exam, but there are a great number of math regents exams. If I am in 11th grade,which one should I take??plz help , this is urgent! !😣
June 8, 2016

Math
I am asked to graph a translated parabola,ok, that's pretty easy, but, then,it says that it must be dobe with a dilatation of 2, does that mean that my axis is going to be this way:2,4,6,8,10...??
June 5, 2016

chemistry
I was given the following problem: what is the normality of a solution containing 6 grams of H2SO4 in a 200ml solution? my teacher obtained a normality of 39normals while I took into account that I had two hydrogen free and obtained a result of 0.6 N, who's right?
June 2, 2016

Math
Find two consecutive odd integers whose product is 323. Would the two numbers be 17,19 and -17,-19???
May 8, 2016

Math
May 8, 2016

Math
A baseball is thrown upward. The path of the baseball models the equation h= -4.9t^2 + 9.2t + 1.6, where h is height of the ball, in metres, after t seconds. How long does it take the baseball to fall to the ground? Plzzz help
May 8, 2016

math
50 people purchase raffle tickets 3 winning tickets are selected at random if the first prize is $1,000, second prize is$500, and third prize is \$100 in how many different ways can the prizes be awarded and is this a permutations or a combinations problem?
May 7, 2016

Mathematics
The terms of the geometric series may be: a , ab , ab^2 . The 2. , 3. , 6. term of the arithmetic series may be: c , c+d , c+4d i.e. a = c , ab = c+d , ab^2 = c+4d ==> ab = a+d ==> d = ab-a ==> ab^2 = a+4(ab-a) = 4ab-3a ==> b^2 = 4b-3 ==> b^2-4b+3 = 0 ==> (b-...
May 5, 2016

The width of a picnic table is 3 times its length. If the length is 5 6 -yd long, what is the area of the picnic table in square feet? sides are 2 1/2 yd and 5/6 yard. then to find area 2 1/2 x 5/6 = 2 5/12 y2 how do I find square feet?
May 5, 2016

english
1. Reich says, “When we see the contrast between the values we share and the realities we live in, that is the fundamental foundation for social change.” What do you think about that statement? How would you describe the disconnect between American values and the ...
April 24, 2016

math
i don't know where to start
April 22, 2016

math
A ladder is placed against a wall with an angle between the ladder and the ground of 76°. If the ladder must reach 10 m up the wall, how long does the ladder need to be?
April 22, 2016

Math
The perimeter of a rectangular field is surrounded by 94 meters of fencing. If the field is partitioned into two parts as shown, a total of 113 meters of fencing is required. Find the dimensions of the field.
April 13, 2016

Visual Basic
how to use formula b=p (1+r)^n, to calculate annual interests for a savings account in visual basic project This is my code so far>>>>>>>>>>>>>> Option Explicit On Option Strict On Option Infer Off Public Class MainForm Private ...
March 27, 2016

physics
162cos60 and 162sin60 81N and 140.3N
March 26, 2016

series
Partial sum = 1/2{3/2-2N+3/(N+1)(N+2)}
March 19, 2016

Calc/Physics
Find the following questions at the depth of 25\text{m}. The gravitational acceleration is g = 9.8\text{m/s}^2 and the density of water is \rho = 1000\text{kg/m}^3. a. Find the hydrostatic force on a square steel plate with sides 2\text{m} placed horizontally. Answer (in ...
March 14, 2016

Math
On a map, two cities are four and one-fourth inches apart. The scale of the map is one-half inch = three miles. What is the actual distance between the towns?
March 8, 2016

Chemistry lab
1)Why is it necessary to heat the alum until its mass does not change by more than 2mg? 2)Why its it necessary to store the alum in a disccator while it cools before measuring the mass? ( systhesis and analysis of alum crystals experiment)
February 23, 2016

Science
A flatt horizontal road is been designed for 60km/hr speed limit if the maximun acceleration of the car travelling on the road is to be 15m/s at the above speed limit.what is the minimun radius of the curvature of the curve on the road
February 2, 2016

Machine
Jack & Jill went to a well to fetch a bucket of water. The full bucket was 500N. Jack weighed 50kg and Jill weighed 40kg. How would you get bucket from the well
January 30, 2016

Math
x=natural gas it dropped by 2cent then increased by 25cents then dropped 43cents...how do I set up this equation?
January 29, 2016

Math
400 exercise books are arranged into 3 piles.The first has 5 more books than the 2nd pile.The number of books in the second pile is twice the number of books in the third pile.How many books are there in the third pile??
December 23, 2015

PrimaryMatheMatics 4A textbook
3000 Exercise books are arranged into 3 piles.The first pile has 10 more books than the second pile.The Number of books in the second pile is twice the number of books in the third pile.How Many books are there in the third pile?
December 22, 2015

Introduction to computers
Which type of updates should be installed in a test environment before being installed in a live enterprise environment?
December 14, 2015

math/phys
someone tell me why this answer is wrong...u are given final wavelength of 0.0022 nm, u want to solve for the intial wavelength using the compton scattering equation which is final wl -intial wl= 0.002426(1-cos(theta)) theta is 45 degrees. so initial w.l. = 0.002426(1-cos45)+0...
December 9, 2015

What is the charge on Pd when it is coordinated with triphenylphosphine? PPh3. Pd(PPh3)4 .... Google tells me the PPh3 is a neutral ligand, how can this be if the metal has to have a charge associated with it?
November 30, 2015

Physics
A container is initially partitioned by a wall into two compartments. The left compartment has volume V1 and the right compartment has volume V2. Both compartments are filled with identical ideal gases at the same temperature T and with an equal number of particles N but at ...
November 19, 2015

Math
What is the standard deviation for the given data. Round your answer to one more decimal place 3,5,6,6,9,1
November 15, 2015

Math
Thanks!
November 12, 2015

Math
Do I just multiply 36X8=288 to find my answer?
November 12, 2015

Math
Each morning, the baker gets up early to bake products for the shop to sell throughout the day. He likes to have 36 boxes of each item available in the shop. How much of each item will he need to bake? (Remember to use equations with a letter standing for the unknown quantity...
November 12, 2015

Math
Please check to see if I did this correctly. This is a 2 part math problem. 1. Janelle has d dimes and n nickles. Her sister has 5 times as many dimes and 6 times as many nickles as Janelle has. Write the sum of the number of coins they have, and then combine like terms. This ...
November 7, 2015

Math
A rectangle has a perimeter of 20 cm. The length of the rectangle is 1 more than twice the width. What is the measurement of the length and width of the rectangle?
November 4, 2015

jim chavani highg
1000 598 49 44
November 4, 2015

Finance
What is the market price of a 5000.00 bond that matures in 9 years and pays 400.00 interest till maturity compounded semi annually?
October 25, 2015

Chm101 introductory inorganic chemistry
I'm going to say sodium, (as a dissolved ion) Wiki: "Every kilogram (roughly one litre by volume) of seawater has approximately 35 grams (1.2 oz) of dissolved salts (predominantly sodium (Na+ ) and chloride (Cl− ) ions). "
October 25, 2015

chemistry
looks good to me, except the C2H6OH should be C2H5OH.
October 25, 2015

stats
nevermind, i found a similar solution. :)
October 25, 2015

stats
38% * not .38%
October 25, 2015

stats
so the question is: the weights of fish in a certain lake are normally distributed with a mean of 10, a standard deviation of 6. if 4 fish are selected what is the probability that the mean weight will be between 7.6 and 13.6? so usually to find prob, we use the normcdf ...
October 25, 2015

math
October 22, 2015

physics eq check
just wanted to know if this is a correct substitution, we are given kinetic energy, and want the debroglie wavelength, that eq is lamba = h / p. = h/ mv Momentum in terms of KE: 1/2 m (p/m)^2 1/2 m p^2/m^2 KE = p^2/2m so... mv can be substituted as squareroot (2*m*KE) in the h...
October 22, 2015

spelling
I need to make a sentence using the word renaissance.
October 20, 2015

Science
The speed of a motorcycle increases from 10.0 km/hr to 50.0 km/hr in 9.0 seconds. What is the acceleration?
October 19, 2015

science
An aircraft lands with an initial velocity of 85 m/s and decelerates at 9.0 m/s2 until it travels at 4.0 m/s. (a) Calculate the distance travelled along the ground by the aircraft as it decelerates. (b) How long does this deceleration take? (First decide which equations to use)
October 16, 2015

Computer Science
Create an array to record the results of rolling a 6-sided die. The user determines the number of rolls. Output the results of each roll and the sum of all rolls. The rolls should produce a random integer from 1-6.
October 15, 2015

Math
Your friend is 1.2 times taller than you. Your friend is 64.5 inches tall. How tall are you?
October 14, 2015

chemistry
what does this mean: is (a molecule) sigma or pi in symmetry? the molecule in question is c triple bond c. ....it has 2 pi bonds and 1 sigma bond....which is symmetrical?
October 12, 2015

math
My 10 digit double the one digit I am less than 50 and greater than 40
October 11, 2015

math
500 gallons, is this correct
October 10, 2015

math
Need help figuring out what is the largest amount: 3000 c 400 pt 250 qt 500 gal
October 10, 2015

physics
in the compton scattering event, the scattered photon has an energy of 120 keV and the recoiling e- has an energy of 40 keV. Find the wavelength of the photon.
October 10, 2015

physics (Compton effect)
need helppp. Find the energy of an x-ray photon that can impart a maximum energy of 50 keV to an electron by Compton collision. Max energy being Kinetic Energy? do I just plug the 50*10^3 eV (convert to J) into the E=h (c/lambda) equation?? We are not given theta, the incident...
October 10, 2015

Chemistry
Rules for addition and sig figs are that you go by the decimal place. 2.1 has 1 decimal place. So the answer has to have 1 decimal place as well. 1.3*10^4.
October 7, 2015

chemistry (inorganic) reflection planes
how many planes of reflection (sigma v) does the letter "H" have? an infinite amount? this is for an intro to group theory / symmetry operations.
October 7, 2015

Math
wait just kidding, its already noted that Y is the product, so it would be C, my bad.
October 7, 2015

Math
I would go with B. It's the only choice that states the product is greater than 4.
October 7, 2015

chemistry uncertainty rule
if I want to find the uncertainty for a certain molar mass containing 4 atoms of Oxygen, do I multiply the error and the MM by 4: like this 4(15.9994 plus of minus .0003) = 63.9976 plus or minus .0012 (distribute the 4?) or follow the rules for mult. of uncertainty which would...
September 25, 2015

Math
Identify the build up of the Sine-Bar to represent the angle. Identify the angle in degrees, minutes and seconds of the arc. Sine29(angle), 17'(minutes),57"(seconds)
September 19, 2015

math
make one equation = 0 so 2(0)-3y=6 3y/3=6/3 y=2 now 2x-3(2)=6 2x-6=6 2x=6+6 2x=12 2x/2=12/2 x=6 now sub that it to the other side y=4(6)-7 y=24-7 y=17 2=4x-7 2+7=4x 9=4x 9/4=4x/4 2.25=x
September 19, 2015

chemistry
would NBr3O be polar or nonpolar?
September 18, 2015

Chemistry
use the formula q = m*c*deltaT
September 17, 2015

chemistry polarity
would one consider the molecule NBr3O to be nonpolar or polar? I feel like all of the dipole moments will cancel, when you draw the VSPER structure the Br atom in the plane and out of the plane cancel, however O going up and the Br coming out of the plane, ...I feel like the ...
September 17, 2015

chemistry vsper/lewis polarity
would one consider the molecule NBr3O to be nonpolar or polar? I feel like all of the dipole moments will cancel, when you draw the VSPER structure the Br atom in the plane and out of the plane cancel, however O going up and the Br coming out of the plane, ...I feel like the ...
September 17, 2015

Chemistry
Mg--->MgO .248 g Mg x (1 mol Mg/MM Mg) x (1 mol MgO/1 mol Mg) x (MM MgO/1 mol MgO) MM are molar masses.
September 14, 2015

physics relativistic energy
thank you! How would I know not to use the mass of 20 kilotons though? I wish they didn't put that in the question it really throws you off haha
September 12, 2015

physics relativistic energy
unlessss.... I just solve for mass and the 20 kiloton is just extra useless information meant to throw people off and do this: e=mc^2 m = E/c^2 m = 8*10^13 J / (3.0*10^8 m/s)^2 m= 8.89 * 10 ^-4 kg hmm
September 12, 2015

physics relativistic energy
I'm not too good with these special relativity problems :/ The question is: A 20 kiloton bomb releases 8 x 10^13 joules. How much mass must be converted into other forms of energy? You are already given Energy, would I still use the E=mc^2 formula?? E=(2.0*10^7 kg)(3*10^8 ...
September 12, 2015

Math
how much yellow paint is needed to mix with one cup of red paint
September 10, 2015

health part 2
According to the world wide web, there are 3. 1)Non-nucleoside reverse transcriptase inhibitors 2)reverse transcriptase inhibitors and 3)protease inhibitors. I would say the simple answer is generally "Inhibitors"
September 2, 2015

Physics Lorentz contraction
This seems like a pretty straightforward question but it's just not making sense at the moment. A meter stick is projected into space at so great a speed that its length appears to have contracted only 50 cm. How fast is it going? So you want the velocity, v. (in terms of ...
September 2, 2015

Chemistry
A, C, E.
September 2, 2015

math
you have 2 positive numbers. One number is one-fifth of the other number.The difference between the two numbers is 152, find the numbers.
September 2, 2015

cnn student news world georgraphy
and why are you unable to listen to the videos on the website?
August 27, 2015

chemistry
Thanks sir! :)
August 27, 2015

chemistry
back again with another analytical Q, the question tells you to prep a 50 mL solution of a 750 ppm iron solution using ammonium iron III oxalate trihydrate (MM: 428.06 as a source of iron. Determine the mass of compound required. I'm assuming you would start with a ...
August 27, 2015

chemistry
first you need to write out the balanced reaction equation of LiOH reacting with CO2. So... 2LiOH + CO2--->Li2CO3 + H2O You start with 920 g CO2 and use this equation to convert to moles CO2 and then to moles LiOH. There are 2 moles LiOH for every 1 mole of CO2. And finally...
August 27, 2015

chemisrty
applying direct pressuer with a clean sterile dressing
August 24, 2015

algebra
Slope of parallel lines are the same. m = -9/2 here so the new line will have a slope of m= -9/2 as well. Through the points (-2,5) y-y1=m(x-x1) y-5=(-9/2)(x--2) y-5=(-9/2)(x+2) y-5=(-9/2)x+(-9) y=(-9/2)x-4.
August 19, 2015

algebra
Get the slope: y2-y1/x2-x1 m= (5-4)/(3-4) m= -1 formula y-y1=m(x-x1) pick a set of points. y-4=m(x-4) y-4=(-1)(x-4) y-4=-x+4 y=-x+8 There is the equation.
August 19, 2015

Dimensional Analysis Chemistry
ahh yes I multiplied by 10^-3 instead lol thank you!
August 19, 2015

Dimensional Analysis Chemistry
want someone to check if this is right, Q: The concentration of lead in drinking water in a home was found to be 2.1x10-9 M. What is the concentration in ppm? ppb? MM=207.2 g/mol. 1 ppm = 1 mg/L. A: 2.1x10^-9 mol/L x 207.2 g/ 1 mol x 1000 mg / 1 g = 4.35x10^-4 ppm. and that is...
August 19, 2015

physics
A bicycle is rolling down a circular portion of a path; this portion of the path has a radius of 8.73 m. As the drawing illustrates, the angular displacement of the bicycle is θ = 0.979 rad. What is the angle (in radians) through which each bicycle wheel (radius = 0.320 m...
August 5, 2015

PSYCH
Unlike the Rescorla Wagner model, Mackintosh's theory of attention states that: A. subjects can learn to pay increased attention to informative CSs. B. subjects can learn to pay less attention to uninformative CSs. C. Both a and b D. Neither a nor b PLEASE HELP
July 16, 2015

1. Pages:
2. 1
3. 2
4. 3
5. 4
6. 5
7. 6
8. 7
9. 8
10. 9
11. 10
12. Next>>