# Posts by omar

Total # Posts: 146

**physics 1**

) An oil tanker’s engines have broken down, and the wind is blowing the tanker straight toward a reef at a constant speed of 1.5 m/s (Fig.1). When the tanker is 500 m from the reef, the wind dies down just as the engineer gets the engines going again. The rudder is stuck...

**math**

the width of a rectangular painting is 2 meters less than the length, the area of the painting is 20 M^2

**Health**

Explain the relationship between hepatitis and virus?

**Calculus**

Given that x=cos^2t and y=ln(sint) find d^2y/dx^2 at the point t=?/4

**Mathematics**

How to use graphs to solve quadratic equations

**math**

The only multiple of 5 between 80 and 90 is 85. Adding one to 85 would be 86. 86 + 2 = 88 which is a multiple of 8. So, 86 is the answer.

**math**

Lolita saved $ 5000 in a saving account which pays 12% interest compounded monthly. Eight months later she saved another $ 5000. Find the amount in the account two years after her first saving.

**physics**

A marine siren consists of a cylinder 72 cm in length closed at one end.for sound through air at 336 m/s. find the lowest frequency of the siren

**Calculus**

But other than solving for y, is it correct?

**Calculus**

Solve the differential equation: dy/dx = (3x^2) / (y+1) with initial conditions x = -1, y = 2 I have: ∫y + 1 dy = ∫3x^2 dx (y^2 / 2) + y = x^3 + C (2^2 / 2) + (2) = (-1^3) + C? 4 = -1 + C 5 = c (y^2 / 2) + y = x^3 + 5 Is this correct?

**physics**

1800kj

**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 ...

**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 ...

**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] ...

**álgebra**

What is the least perimeter of a rectangle with an area of 32 square feet?

**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?

**english**

how meny sea creaturs are dead

**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?

**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

**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 ...

**math**

1.5years

**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

**statistics**

2. Find the variance and standard deviation of the following sample. 0 -5 -3 6 4 -4 1 -5 0 3

**math**

2 over 5m-14=9+3 over 5m

**math**

12-3b<9

**Physics**

ive heard this question and the answer is the plane will be right over the package because of the acceleration of the package

**French, foreign language**

1. escargots

**French, foreign language**

4. œufs not oeuf 6. l'ail (garlic) 3. carottes

**Science**

Gaff BBC dying vs as think long day in cf

**chemistry**

how many milligrams of calcium is in 1.229-g of calcium carbonate?

**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 ?

**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 ...

**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 ...

**Physics**

0.58

**Algebra**

Emilio has 67.6 of trees

**consumer math**

how many feet are there in 24 yards

**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

**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

**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

**Algebra 2**

d(x)= (54x^10)/(24x^8 )please help

**algebra 2**

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

**algebra 2**

MY BAD WRONG QUESTION I ASKED IT IN THE QUESTION ABOVE

**algebra 2**

write in standard form. (2b^2b)+(b^2+4b-4)

**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?

**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...

**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 ...

**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?

**dynamics**

a 2kg ball revolves in a horizontal circle as shown at a constant speed of 1.5m/s. Knowing that L=600mm, determine (a) the angle that the cord with the vertical (b) tension in the cord.

**Algebra 2**

y+1=x -2x+3y=2

**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?

**Math**

15 countersare how many 3\5

**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?

**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?

**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)

**Math ASAP**

the picture of the shape looks like a pentagon but the rectangle is much longer

**Math ASAP**

i still don"t get it

**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?

**Math ASAP**

Base Area: 22 square inches Lateral Surface Area: 308 square inches What is the Surface Area of the hexagonal prism?

**Math ASAP**

Base Area: 22 square inches Lateral Surface Area: 308 square inches What is the Surface Area of the hexagonal prism?

**Math ASAP**

Top Area: 26 square inches Top Perimeter: 34 inches Height: 11 inches What is the Surface Area of the 12-sided prism?

**Math ASAP**

320?

**Math ASAP**

Top Area: 13 square inches Total Surface Area: 346 square inches What is the Lateral Surface Area of the 5-sided prism?

**Math ASAP**

Base Area: 23 square inches Height: 11 inches What is the Volume of the hexagonal prism?

**Math ASAP**

yes its A pentagonal prism

**Math ASAP**

Volume of Prisms: Volume: 150 cubic inches Top Area: 10 square inches What is the height? {5-sided prism}

**project**

i need to write projec about travel guide to Libay ?

**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.

**algebra**

Que? :b

**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.

**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.

**chemisrty**

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

**math**

50 red cars and 30 white and 20 blue what is the probability of 2 cars from the same colors ?

**Science**

What is mantenrep?

**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?

**Probability and statistics**

What they said

**Math**

We must make multiply or addition??

**math**

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

**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.

**Algebra**

Find the roots of the given equation by completing the square. αx^2 + βx + δ = 0

**Algbera**

solve for the roots of the quadratic equation 2(x^2 - 4x + 5)=x^2 - x

**algebra**

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

**science**

look go answer it your self good

**algebra**

n-3=4

**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

**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 ...

**World History**

purple kush

**trig**

Find the exact value by using a half-angle identity. cos 22.5 degrees

**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

**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

**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

**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.. ...

**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.

**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.

**Modern Physics**

It seems like I'm answering this 5 years later, but this is for anyone who needs this in the future! Helium is a hydrogen-like atom. Using the fact that the ground state energy of hydrogen is 13.6eV, we can use the relation: E = 13.6eV(z^2/n^2) to calculate the energy ...

**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.

**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.

**physics**

I just don't understand the problem and i don't know how to solve it!

**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.

**Chemistry**

What quantity of HNO3 can be neutralized by 0.1L of 0.50 m NaOH

**Chemistry**

What quantity of HNO3 can be neutralized by 0.1L of 0.50 m NaOH