Friday
May 6, 2016

# Posts by Omar

Total # Posts: 129

PHYSICS
A 3.50 kg ball with a velocity of 10.00 m/s collides with a stationary ball with a mass of 5.00 kg. After the collision, the first ball travels at a 42.6 degree angle from its original path, while the second ball travels at a -26.7 degree angle from the other ball's ...
March 27, 2016

Calculus
1) A telephone company has 10,000 phones in a certain city where the basic rate is \$4 per month. The officials have evidence that if the charge is reduced the number of phones will increase at an estimated rate of 1,000 phones for each 25 cent reduction. What rate would yield ...
March 21, 2016

calc
Find the point on the graph of y = x2+1 that is closest to the point (3,1). d = √[(x-3)^2+(y-1)^2] d = √[(x-3)^2+(x^2+1-1)^2] d = √[(x-3)^2+(x^2)^2] d = [(x-3)^2+x^4]^1/2 d' = 1/2 [(x-3)^2+x^4)^1/2 [2(x-3)+4x^3] 0 = [1(2x-6+4x^2)] / [2√(x-3)^2+x^4] ...
March 17, 2016

álgebra
What is the least perimeter of a rectangle with an area of 32 square feet?
January 27, 2016

math
Jennifer drove at steady speed for 2 hours then reduced speed by 10 mph and drove for another 3 hours what was the initial speed if the total distance was 220 miles?
January 12, 2016

english
how meny sea creaturs are dead
December 8, 2015

chemistry
You want to prepare 500 ml of 1.0M acetic acid from a 17.4 M stock solution.What volume of stock solution is required?
November 28, 2015

java programming
the learner is asked to write a program using java with user input that caculate and displays, the number of months it will take the user to save an amount of money. the user must enter the
November 17, 2015

Physics
The MAVEN spacecraft, a NASA mission that is studying the Martian atmosphere, launched from Cape Canaveral in November 2013 on an Atlas V rocket. The rocket burns about 280,000 kg of fuel over 4 minutes (you can assume dm/dt is constant over that interval) and ejects the fuel ...
November 17, 2015

Burnhamthrop Chemistry
initially 0.25 mol of water vapour and 0.20 mor of carbon monoxide are place in a 1.00 L reaction vessel. at equilibrium spectroscopic evidence shows that 0.10 mol of corbon dioxide is present calculate K for the reaction
October 31, 2015

statistics
2. Find the variance and standard deviation of the following sample. 0 -5 -3 6 4 -4 1 -5 0 3
October 7, 2015

math
2 over 5m-14=9+3 over 5m
September 17, 2015

math
12-3b<9
September 16, 2015

Physics
ive heard this question and the answer is the plane will be right over the package because of the acceleration of the package
June 1, 2015

chemistry
how many milligrams of calcium is in 1.229-g of calcium carbonate?
December 4, 2014

chemistry
what is the mass (by difference) of a sample if the initial mass of the sample in the bottle was 29.89-g and the final mass of the bottle and sample was 22.01-g ?
December 4, 2014

Physics
Two workers are sliding 310kg crate across the floor. One worker pushes forward on the crate with a force of 440N while the other pulls in the same direction with a force of 230N using a rope connected to the crate. Both forces are horizontal, and the crate slides with a ...
November 21, 2014

Physics
A chair of weight 85.0N lies atop a horizontal floor; the floor is not frictionless. You push on the chair with a force of F = 45.0N directed at an angle of 34.0∘ below the horizontal and the chair slides along the floor. Using Newton's laws, calculate n, the ...
November 20, 2014

consumer maht
how many feet are there in 24 yards
May 28, 2014

Algebra 2
Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn!F(h) = x^2-9/x^2-4x+3
April 3, 2014

Algebra 2
Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn! h(x)=x^2-9/x^2-4x+3
March 28, 2014

Algebra 2
Please help me solve and find the excluded values for this problem. Also please show me the work for this problem I want to learn!@!@!. 49X^6+7X^7/28X^8
March 28, 2014

Algebra 2
March 25, 2014

algebra 2
Write in standard form (2b^2-b)+(b^2+4b-4) PLEASE EXPLAIN ON HOW TO DO IT I WANT TO LEARN
February 10, 2014

algebra 2
February 10, 2014

algebra 2
write in standard form. (2b^2b)+(b^2+4b-4)
February 10, 2014

Physics
You pick up a 2.5kg can of paint from the ground and lift it to a height of 1.7m .How much work do you do on the can of paint? You hold the can stationary for half a minute, waiting for a friend on a ladder to take it. How much work do you do during this time?
February 7, 2014

Math
I solved the equation in quadratic since the equation has perfect squares x^2+2x-35+0 ax^2 +bx -c=0 split the bx into 7 and -5 then you have ,x^2 +7x -5x -35=0 then factorize the equation to get x(x+7)-5(x+7)=0 (x-5)(x+7)=0 then equate each identity to zero solve for x x-5=0 x...
February 7, 2014

math
let the total t-shirts be x then, RED:3x/7 BlUES:x/3 Yellow: x-(3x/7 +x/3)=5x/21 we know reds are 20 more than blues therefore, 3x/7 =(x/3 +20) then solve for x by subtracting x/3 both sides (3x/7)-(x/3)=20 (2x/21)=20 ,multiply 21 both sides to eliminate the denominator ,then ...
February 6, 2014

Math
A bottle of juice holds 3/8 gallon when it is full. If 1/3 of the juice has been poured out, how much juice is left in the bottle?
November 20, 2013

Algebra 2
y+1=x -2x+3y=2
November 13, 2013

physics
What is the distance between an object and its real image formed by a thin converging lens with focal length f = 14 cm, if the object distance is 60 cm? (b) What is the minimum object-image distance for a real image formed by that lens?
November 7, 2013

Math
15 countersare how many 3\5
October 30, 2013

physics
A ball is shot upward from the ground with an initial velocity of 12.0 m/s, along a y-axis that extends upward and that has its origin y = 0 on the ground. How much time does the ball take to move upward from y = 3.00 m to y = 5.00 m?
September 12, 2013

physics
If the water had lost 12000 joules and the calorimeter gained 1300 joules as the temperature of both rock and calorimeter increased from 22°C to 73°C and the mass of rock in the calorimeter was 189 grams, what is the specific heat, c, of the rock material?
September 7, 2013

Math ASAP
Height: 10 inches Base Perimeter: 40 inches Lateral Surface Area: 400 square inches (^^^this is the total surface area of the sides) What is the Surface Area of the triangular prism? (the picture of the shape looks like a pentagon but the rectangle is much longer)
August 26, 2013

Math ASAP
the picture of the shape looks like a pentagon but the rectangle is much longer
August 26, 2013

Math ASAP
i still don"t get it
August 26, 2013

Math ASAP
Height: 10 inches Base Perimeter: 40 inches Lateral Surface Area: 400 square inches (^^^this is the total surface area of the sides) What is the Surface Area of the triangular prism?
August 26, 2013

Math ASAP
Base Area: 22 square inches Lateral Surface Area: 308 square inches What is the Surface Area of the hexagonal prism?
August 24, 2013

Math ASAP
Base Area: 22 square inches Lateral Surface Area: 308 square inches What is the Surface Area of the hexagonal prism?
August 24, 2013

Math ASAP
Top Area: 26 square inches Top Perimeter: 34 inches Height: 11 inches What is the Surface Area of the 12-sided prism?
August 24, 2013

Math ASAP
Top Area: 13 square inches Total Surface Area: 346 square inches What is the Lateral Surface Area of the 5-sided prism?
August 24, 2013

Math ASAP
Base Area: 23 square inches Height: 11 inches What is the Volume of the hexagonal prism?
August 24, 2013

Math ASAP
yes its A pentagonal prism
August 20, 2013

Math ASAP
Volume of Prisms: Volume: 150 cubic inches Top Area: 10 square inches What is the height? {5-sided prism}
August 20, 2013

project
i need to write projec about travel guide to Libay ?
May 11, 2013

Geomatry
A pilot flying at an altitude of 3500 feet sees a baseball field at an angle of depression on 35 degrees. what is the pilot's approximate horizontal distance, x, from the baseball field at this point? round your answer to the nearest foot.
April 26, 2013

algebra
Que? :b
February 24, 2013

math
Find all pairs of numbers such that when they are added they equal 100, and when they are multiplied they are at least 2000.
February 13, 2013

math
By a unit fraction, we mean a rational number with a numerator of 1. Symbolically, 1 b where b is a nonzero integer. Find six distinct, positive unit fractions whose sum is 1.
February 6, 2013

chemisrty
how many grams of cai2 are present in 3.28 moles? Can someone explaine how to do this question as well?
January 24, 2013

math
50 red cars and 30 white and 20 blue what is the probability of 2 cars from the same colors ?
January 16, 2013

Science
What is mantenrep?
December 2, 2012

Physics
In a head-on collision, a car stops in 0.13s from a speed of 26m/s . The driver has a mass of 62kg , and is, fortunately, tightly strapped into his seat. What force is applied to the driver by his seat belt during that fraction of a second?
October 5, 2012

Probability and statistics
What they said
September 18, 2012

Math
We must make multiply or addition??
September 6, 2012

math
what is the answer to 5z-1=?, 8s+4= etc. im thinking it is 5x3 (z=3)-1 equals 14. am I right?
May 29, 2012

chemistry
I still don't understand how to find the partial pressure of CO2. I've got the H+ concentration but I'm stuck at that step.
April 7, 2012

Algebra
Find the roots of the given equation by completing the square. αx^2 + βx + δ = 0
February 27, 2012

Algbera
solve for the roots of the quadratic equation 2(x^2 - 4x + 5)=x^2 - x
February 26, 2012

algebra
Sam earns R1 350 per week doing tiling. How much does sam earn in an hour if he works 45 hours a week?
February 1, 2012

science
January 31, 2012

Physics
Sum of X forces = T = m1a = (30.5kg*a) Sum of Y forces = 125N - T = m2a = (12.5kg*a) 125N - (30.5kg*a) = (12.5kg*a) 125N = 43kg*2a 2.85m/s^2 = 2a 1.425m/s^2 = a
January 17, 2012

OChem
A solution consisting of water and ethanol is found to have a refractive index of 1.3541 at 20 degrees C. The refractive indices at 20 degrees C of water and ethanol are 1.3330 and 1.3610, respectively. Determine the molar composition (in percent) of the mixture by assuming a ...
October 26, 2011

World History
purple kush
October 13, 2011

trig
Find the exact value by using a half-angle identity. cos 22.5 degrees
October 11, 2011

Pre-calculus
The problem is Find the difference quotient and simplify your answer F(x)=5x - x^2, F(5+h) - F(5) over h ^2 this means power of two
August 15, 2011

geometry
abcd is a rectangle such that ab=-3 radical sign 48+2 radical sign 75+4radical sign108 and Bc=4 radical sign 27 +radical sign 300 prove that abcd is a square
June 29, 2011

Algebra
=2/3(4X-2X^2)/2X^2 + 3(3-3X)/3X =(4X^2-2X)/3X^2 + (3-3X)/X =(4X^2-2X+9X-9X^2)/3X^2 = (-5X^2+7X)/3X^2
May 30, 2011

physics
a 1500 kg car travelling at 16.7 m/s to the south collides with a 6300 kg truck that is initially at rest at a stop light. the car and the truck sticks togetherand moves together after the collision. what is the final velocity of the two-vehicle mass? answer in units of m/s.. ...
May 30, 2011

physics
a car, moving at 100 mi/hr, passes a stationary police car whose siren has a frequency of 500 Hz. what is the frequency change heard by observer in the moving car as he passes the police car? the velocity of sound in air is 343 m/s. ( 1 mi= 1.609 km). answer in units of Hz.
May 30, 2011

physics
a sound wave has frequency of 631 Hz in air and a wavelength of 0.54m. what is the temperature of the air? assuming the velocity of sound at 0 degree celcius is 334 m/s. answer in units of celcius.
May 30, 2011

physics
how do u find the acceleration of the sled? and what applied force would be required to cause the sled to move at a constant velocity, explain your logic and show all your calculations.
April 3, 2011

physics
a 12 kg sled is pulled horizontally with a force of 82 N. the coefficent of the kentic friction of the sled is 0.42. draw a FBD of the sled.
April 3, 2011

physics
I just dont understand the problem and i dont know how to solve it!
March 31, 2011

physics
object A exerts a gravitational force of magnitude 8.2 x 10^-10 N on object B. determine the magnitude of the gravitational force if, simultaneously, the separation distance is tripled, mA increased by 4 times and m8 is halved. explain your reasons and show all calculations.
March 31, 2011

Chemistry
What quantity of HNO3 can be neutralized by 0.1L of 0.50 m NaOH
March 29, 2011

Chemistry
What quantity of HNO3 can be neutralized by 0.1L of 0.50 m NaOH
March 29, 2011

chemistry
formic acid is a monoprotic acid with a ka at ml solutionof m of formic acid solution is titrated with m naoh what is the ph at the equivalence point
March 29, 2011

Physics
yea buddy
March 24, 2011

physics
does sunlight warm your body with light waves yes or no and why
March 15, 2011

possessive nouns
the chirps of the baby birds are quiet.
January 13, 2011

math
36 students need to be divided into teams of equal size. How many different ways can the students be divided (assuming each team must have more than 1 member)?
January 5, 2011

algebra
A 400 g solution is 25% salt. How much salt must be added to produce a solution that is 40% salt?
December 2, 2010

algebra
A 400 g solution is 25% salt. How much salt must be added to produce a solution that is 40% salt?
December 2, 2010

Physics
1025 is the density of sea water and 917 is the density of ice and 5,2 is the volume of the ice floating on the sea water
November 29, 2010

Physics
density of ice 917 kg/m^3, density of sea water is 1025 kg/m^3, a piece of ice floating has a volume of 5.2 m^3, what is the weight of the heaviest bear the ice can support without sinking?
November 29, 2010

when crating an interval for a requncy table-hoe do you determine the interval number-
November 9, 2010

list four things all living things do
October 31, 2010

algebra 2
10X+7y= amount of money earned X= hours tutoring constraints: X+Y less than or equal to 16 X greater than or equal to 3 X less than or equal to 8 Graph it and find coordinates of intersectoin, then plug them in and see which one gives you the most money
October 14, 2010

Chemistry
I did a lab for Organic Chemistry I did a simple distillation for an unknown and found that it boiled at 76 degrees. I also found out that the unknown was ethanol since we knew what the 4 possibilities were and mine was closest to ethanol. I also did a fractional distillation ...
October 6, 2010

Casey said that 40 people were surveyed.Is his answer reasonable?
July 1, 2010

Math
C(13,5) = 13!/(3!*10!) = 154440/120 = 1287
June 21, 2010

chemistry
90Sr is one of the harmful radionuclides resulting from nuclear fission explosions. It decays by a first-order process with a half-life of 28 years. How many years would it take for 99.99% of a given sample released in the atmosphere to disintegrate? Answer in units of years. ...
April 29, 2010

chemistry
Consider the first order reaction A --> products where 25% of A disappears in 24 seconds. What is the half life of this reaction? ...i thought it would just be doubled but it isn't. i'd appreciate an explanation.
April 29, 2010

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