Posts by Jordan

Total # Posts: 1,046

Basic Math
A student claims that 2/3 = 6/7 because if you add 4 to both the top and the bottom of a fraction, the fraction does not change. How do you respond? I am a bit confused. Don't you need to have a common denominator?

Science
When u kick a stone your foot exerts force on the stone and the stone exerts a force ? in size and ? in direction on your foot

3rd grade math hw help!
1.) A E L V 2.) F H T Z I N Y 3.) K M W 4.) X 5.) Because the remaining letters has curves or are round. Polygons are made out of straight lines and not round

Chemistry
The following information is given for ethanol, C2H5OH, at 1atm: boiling point = 78.4oC Hvap(78.4oC) = 38.6 kJ/mol melting point = -115oC Hfus(-115oC) = 5.02 kJ/mol specific heat liquid = 2.46 J/goC At a pressure of 1 atm, what is H in kJ for the process of condensing a 40.8 g...

math 10
how do i work out the answer to: "how many integer values are there for k for which 4x^2 + kxy - 9y^2 is factorable?"

math
each box has 10 pencils . how many pencils do 3 boxes have ?

math
how to isolate a variable with a component. 60+80x1 over 2 to the exponent of "T" over 30+20 solve for T

math
how to isolate a variable with a component. 60+80x1 over 2 to the exponent of "T" over 30+20

You divide by -1

Math
A set of data has a mean of 35 and an outlier of 100. You find the mean without the outlier. Which of the following best describes your new mean?

english
help me please!!!!! The manner in which action is presented indicates verb: mood. tense. voice.

calculus
How do you find the derivative of (-2(x^2+1))/((x^2-1)^2) ? I have the answer which is: (4x(3+x^2))/(x^2-1)^3) I can't figure out my mistake when I'm doing it though. Could you solve it step by step?

Social Studies
How have the uses of Bamboo changed since 1980 until now?

MATH
how do i solve this into a proportion, 3oz for $1.65; 5oz for x dollors Physics Consider two vectors where F1 = 40 N, F2 = 57 N, and \theta _{1} = 240o and \theta _{2} = 25o, measured from the positive x-axis with counter-clockwise being positive. What is the magnitude of the equilibriant? 8th grade math i need help math what fraction strips would you use yto find the sum of 3/8 and 4/8? explain cal 1 Find the dimensions of the rectangle of largest area that has its base on the x-axis and its other two vertices above the x-axis and lying on the parabola. (Round your answers to the nearest hundredth.) y = 7 - x^2 Cal Find the slope of the tangent line to the curve at (2,1) x/y + x^2y^2 = 6 10th grade 720 grams physics A boy pulls his little brother in a little red wagon. He keeps the handle horizontal to the ground. His little brother and the wagon weigh 40 kg. How much tension will the boy have to place on the wagon's handle to get it moving from a standstill? English In Invisible Man, the main character disproved of Tod Clifton and didn't like that he was selling sambo dolls. Why would he then make Clifton seem like a hero, and give a grand speech about him at his funeral? Was it because he wanted to impress others with his oratorical ... Physics 2.23 History When was the evolution of the socio- political milieu during the colonial period including Protestant Christianity's impact on colonial social life Cal A plane flying horizontally at an altitude of 3 mi and a speed of 480 mi/h passes directly over a radar station. Find the rate at which the distance from the plane to the station is increasing when it is 6 mi away from the station. (Round to the nearest whole number.) math a deposit of$2500 grew to $3325 after six years. what is the final value of a deposit of$7500 at the same interest rate for the same period of time?.

Chemistry
Use a combustion reaction of liquid ethanol in air as a source of work, assuming temperature is 25 deg C, air pressure is 1atm and all products are gases with partial pressures of 10atm each. How high can one lift a 1000kg weight by burning 100g of ethanol? *oxygen is 21% (by ...

Physics
A baseball is popped straight up into the air and has a hang-time of 6.25 s. Determine the height to which the ball rises before it reaches its peak.

Chemistry
you have them in order already, from weakest to strongest.

Physics-Kinetic energy
the only formula you will need for both of these questions is : E = 0.5mv^2 E = kinetic energy (J) m = mass of object (kg) v = velocity of object (m/s) you should be able to go from here, just sub in the values.

physics
use the formula F=ma remember m has to be in kg

Earth Science
the tilt of the earth and the rotation of the earth around the sun. try to picture the scenario, as the earth revolves around the sun with the tilt that it has, half of the year the northern hemisphere will be closer to the sun and the other half of the year the southern ...

Physics kinetic energy
because v is the only thing changing the value of m is not relevant. to find out what would happen to the energy we compare the differences in v ie 10^2 = 100 5^2 = 25 since the new v value is a quarter of the previous value the answer is (d) alternatively, your reasoning ...

Physics acceleration
a = (v-u)/t v = final velocity (m/s) u = initial velocity (m/s) t = time taken for change in velocity (s) a = acceleration (m/s^2)

maath
draw the graph of y = 3^x then look to see where y = 9, this is where 3^x = 9

Physics
On an open-reel tape deck, the tape is being pulled past the playback head at a constant linear speed of 0.372 m/s. (a) If the radius of the film taken up so far (as shown in the upper part of the drawing) is 0.0576 m, find the angular speed of the take-up reel. ____ rad/s (b...

geometry
How would you figure this question out? :The measures of two sides of a triangle are 8 and 11. Use an inequality to express the range of the third side, m.

physics
An electric drill starts from rest and rotates with a constant angular acceleration. After the drill has rotated through a certain angle, the magnitude of the centripetal acceleration of a point on the drill is twice the magnitude of the tangential acceleration. What is the ...

Chemistry 1
What is the minimum amount of a 6.0 M solution of sulfuric acid necessary to produce 25 grams of hydrogen gas if the molar ratio in the chemical reaction is a 1:1

Physics
A force of 165 N is needed to keep a small boat moving at 2.57 m/s. What is the power required to keep the boat moving at the steady speed? >> I understand that P=Fv but I don't understand the second question. If the resistive force of the water increases with the ...

Physics
A force of 165 N is needed to keep a small boat moving at 2.57 m/s. What is the power required to keep the boat moving at the steady speed? >> I understand that P=Fv but I don't understand the second question. If the resistive force of the water increases with the ...

MATH
SHOW IN A SKETCH 3/5 OF AN HOUR

Physics
A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball is released from rest (see the drawing). It swings downward and strikes a block initially at rest on a horizontal frictionless surface. Air ...

A polygon has a perimeter of 24mm. Find the new perimeter after a scale factor of 1/4 is applied?

College Physics
A wagon is rolling forward on level ground. Friction is negligible. The person sitting in the wagon is holding a rock. The total mass of the wagon, rider, and rock is 96.5 kg. The mass of the rock is 0.250 kg. Initially the wagon is rolling forward at a speed of 0.460 m/s. ...

science
how many hm are in 726.5 dm ?

physics
The drawing shows a version of the loop-the-loop trick for a small car. If the car is given an initial speed of 4.5 m/s, what is the largest value that the radius r can have if the car is to remain in contact with the circular track at all times?

CALC
Ok, I was half right. The formula works for cubes and squares if you think of the area of a square being 4r^2, and the volume of cube being 8r^3, where r is the radius and x=2r

CALC
Nevermind, I lied.

CALC
You have to start from the origin. Try calculating it in terms of r, where x=2r. You will get the right answer

Intermediate Algebra
Determine whether the point (1, 8) is a solution of the system 2x + 6y = 50 10x + 0y = 10 by substituting the point into each equation. So far I have: 2x=6y=50 y=50-2x 10x+10y=10 10x+0(50-2x)=10 10x+0=10 x=10 y=50-2x y=50-2(1) y=50-2 y=48 PLEASE HELP! I'm lost. I've ...

Physics
A) Calculate the mass of the sun from the radius of the earth's orbit (1.50×1011 m), the earth's period in its orbit, and the gravitational constant G. B) What is the density of the sun ? (The sun's radius is 6.96×108 m). Notice how it compares with the...

math
I neeeed help on this problem 3x-5y=7 5x-2y=-1 It's addition method and I can't figure it out plleeaaaassse help me

math
did you hear about...

statistics
Event Probability Too much enamel 0.25 Too little enamel 0.2 Uneven application 0.35 No defects noted 0.42 (1) What is the probability of a paint defect? What is the probability of a paint defect which includes an improper amount of paint?

math
Event Probability Too much enamel 0.25 Too little enamel 0.2 Uneven application 0.35 No defects noted 0.42 (1) What is the probability of a paint defect? What is the probability of a paint defect which includes an improper amount of paint?

AP U.S. history
what additional safeguards were proposed by thomas jefferson and james madison in the virgina and kentucky resolutions, and what werethe implications of these resolutions with regard to the growth of the centeral government?

trig
Let µ be an angle in standard position that contains the point with co- ordinates (-5;-12) on its terminal side. Determine the values of the six trigono- metric functions of angle µ.

math
Assume that there are 13 frozen dinners: 5 pasta, 4 chicken, and 4 seafood dinners. The student selects 5 of them. What is the probability that at least 2 of the dinners selected are pasta dinners?

physics
d=vot+1/2at^2 vf=vo+at V=d/t Use these equations to solve the problem.

Angle QRS is a straight angle. If a=2c, c=2b, and b=d/3, what are the values of a,b,c,and d? a+b+c+d = 180

space
How could measuring the orbit of a comet help scientists understand when it will next be visible from Earth?

Math
Draw a number line make sure the following numbers are on your number line 1,472: 1,560: 1,481

Math/College Algebra
1.)Complete the square to find all real solutions of equation 3 x^2 + 4 x - 1 = 0. X1= X2= 2.)\sqrt{7 x - 9} + 6 = 3x there are two solutions 3.)4 <= 5 x - 4 <10 4.)(x/4x-16)-7 = (1/x-4) 5.) (1/R) = (1/R1)+ (1/R2) for R1

math
It's from a website called WebWork where we do the homework on.

math
wow thank you so much! i spent hours on that problem. thanks again for the help.

math
1.)The polynomial 729 x^{3} - 1 y^{3} can be factored into the product of two polynomials, A * B where the degree of A is greater than the degree of B. Find A and B. 2.)The polynomial 16 a^{6} + 8 a^{3}b + 1 b^2 - 49 c^{6} can be factored into the product of two polynomials, A...

math
The polynomial 14 x^3 + 8 x^2 + 21 x + 12 can be factored into the product of two polynomials, A * B where the degree of A is greater than the degree of B. Find A and B.

Econ
1.ÊA production-possibilities curve indicates the:Ê A.ÊCombinations of goods and services an economy is actually producing. B.ÊMaximum combinations of goods and services an economy can produce given its available resources and technology. C.Ê...

Chemistry
0.37 moles of xenon gas (Xe) are captured in a 1.0-L container at 25 degrees celcius. Given the van der Waals constants for Xe, calculate the pressure of Xe gas inside the container?

dynamath
the value of 2 coins is 35 cents. one of the coins is not a quarter. what are the 2 coins

chemistry
a mixture of 3 gases a, b and c is at a total pressure of 6.11 atm the partial pressure of gas a is 1.68 atm, that of gas b is 3.89 atm. what is the partial pressure of gas c?

math
solve this equasion-4x-18+3x+20=4

math
thank ya soooo much...this really helped ;)

Integrated Chem/Phys
If the density of a 225g stuffed plush toy is 1.25g/cm^3 and the water volume in a glass is 25 ml, find the new level of water after the toy is pushed under water. I know that D=m/v so 1.25=225/v so 1.25/225=v so I got .005 which cannot possibly be right. I am obviously doing ...

If today is Tuesday, what interger stands for last Sunday

Science
A car is traveling at 15 m/sec. Ten minutes later it is traveling at 70 m/sec. What is the acceleration?

i don't know i want u to tell me

math
A rectangular prism with a base area of 38 sq in & height of 9 in is filled to the top with water. The water is poured into fish tank that is 21 in by 8 in and is 10 in tall. How high is the water in the fish tank?

college
Two copper rings are dropped from a region where no magnetic field exists into a region where a strong magnetic field exists. The rings are identical except for a break in one of them. What can happen to the rings' motion as they fall through the magnetic field?

physics
The polar ice caps contain about 2.76E+19 kg of ice. This mass contributes negligibly to the moment of inertia of Earth because it is located at the poles, close to the axis of rotation. Estimate the change in the length of the day that would be expected if the polar ice caps ...

physics
In the figure below, a constant horizontal force Fapp of magnitude 18 N is applied to a wheel of mass 12 kg and radius 0.50 m. The wheel rolls smoothly on the horizontal surface, and the acceleration of its center of mass has magnitude 0.50 m/s2. What is the friciotnal force ...

physics
If a 31.0 N·m torque on a wheel causes angular acceleration 22.0 rad/s2, what is the wheel's rotational inertia?

math
Show 1/4 of a set of 8 counters. How many counters is that?

biology
How could a substance that stops the sythesis of mRNA cause the liver to stop functioning(the death of liver cells)?

Object Orientation
WHAT IS THE MODULARITY IN OOP? AND WHAT IS HIERARCHY? AND WHATS THE DIFFERENCE BETWEEN BOTH AND INHERITANCE?

Object Orientation
Use your own words to describe or Explain the 4 basic principles of Object Orientation. ( Abstraction, Encapsulation, Modularity, and Hierarchy) Thanks for the help

physics
Weight is equal to the mass of the object multiplied by the force of gravity attracting the object. giving the equation W=mg with mass in kg (i)W=2000x9.8 = 19,600N (ii) for this one we need to work out what the force of gravity will be at an altitude of 1000km above the Earth...

math
place each of them on a common denominator of w^2, so it will become (49/w^2) + (8/w^2) = (57/w^2)

PHYSICS
alright then, I'll check out some books. Thanks for your help.

PHYSICS
Can you explain more of the theory side? with the double slit experiment, photoelectic effect, compton effect, reflection, refraction, stuff like that?

PHYSICS
How can an election be particle and a wave at the same time?

geometry
2x-3+4xx+1+2xx-3xx-5

what kind of triangle has all 3 angles that are all less than a right angle?

physics
A 3 meter tall 40 degree inclined plane with a coefficient of friction of .3 with a box sliding from its top has this acceleration and final velocity.

the industrial revolution helped provide jobs in europe

I am also doing this same exam and confused of all the above! Someone please help us!!!!

What website can I go to to help me with my math?

arithmetic
how do you write this as a unit rate 25000/5

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