Sunday

December 21, 2014

December 21, 2014

Total # Posts: 803

**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 ...
*October 20, 2010*

**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 ...
*October 20, 2010*

**MATH**

SHOW IN A SKETCH 3/5 OF AN HOUR
*October 18, 2010*

**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 ...
*October 15, 2010*

**Advanced Algebra 1**

A polygon has a perimeter of 24mm. Find the new perimeter after a scale factor of 1/4 is applied?
*October 14, 2010*

**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. ...
*October 14, 2010*

**science**

how many hm are in 726.5 dm ?
*October 8, 2010*

**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?
*October 8, 2010*

**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
*October 7, 2010*

**CALC**

Nevermind, I lied.
*October 7, 2010*

**CALC**

You have to start from the origin. Try calculating it in terms of r, where x=2r. You will get the right answer
*October 7, 2010*

**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 ...
*October 7, 2010*

**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...
*October 6, 2010*

**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
*October 4, 2010*

**math**

did you hear about...
*October 4, 2010*

**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?
*September 29, 2010*

**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?
*September 29, 2010*

**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?
*September 26, 2010*

**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.
*September 23, 2010*

**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?
*September 20, 2010*

**physics**

d=vot+1/2at^2 vf=vo+at V=d/t Use these equations to solve the problem.
*September 19, 2010*

**11th grade**

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
*September 13, 2010*

**space**

How could measuring the orbit of a comet help scientists understand when it will next be visible from Earth?
*September 9, 2010*

**Math**

Draw a number line make sure the following numbers are on your number line 1,472: 1,560: 1,481
*September 9, 2010*

**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
*August 29, 2010*

**math**

It's from a website called WebWork where we do the homework on.
*August 22, 2010*

**math**

wow thank you so much! i spent hours on that problem. thanks again for the help.
*August 22, 2010*

**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...
*August 22, 2010*

**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.
*August 22, 2010*

**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...
*July 11, 2010*

**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?
*July 6, 2010*

**dynamath**

the value of 2 coins is 35 cents. one of the coins is not a quarter. what are the 2 coins
*June 7, 2010*

**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?
*May 24, 2010*

**math**

solve this equasion-4x-18+3x+20=4
*May 24, 2010*

**math **

thank ya soooo much...this really helped ;)
*May 20, 2010*

**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 ...
*May 6, 2010*

**Science**

A car is traveling at 15 m/sec. Ten minutes later it is traveling at 70 m/sec. What is the acceleration?
*May 2, 2010*

**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?
*April 20, 2010*

**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?
*April 13, 2010*

**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 ...
*April 9, 2010*

**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 ...
*April 7, 2010*

**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?
*April 7, 2010*

**math**

Show 1/4 of a set of 8 counters. How many counters is that?
*April 7, 2010*

**biology**

How could a substance that stops the sythesis of mRNA cause the liver to stop functioning(the death of liver cells)?
*March 23, 2010*

**Object Orientation **

WHAT IS THE MODULARITY IN OOP? AND WHAT IS HIERARCHY? AND WHATS THE DIFFERENCE BETWEEN BOTH AND INHERITANCE?
*March 15, 2010*

**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
*March 15, 2010*

**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...
*March 10, 2010*

**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)
*March 9, 2010*

**PHYSICS**

alright then, I'll check out some books. Thanks for your help.
*March 7, 2010*

**PHYSICS**

Can you explain more of the theory side? with the double slit experiment, photoelectic effect, compton effect, reflection, refraction, stuff like that?
*March 7, 2010*

**PHYSICS**

How can an election be particle and a wave at the same time?
*March 7, 2010*

**geometry**

2x-3+4xx+1+2xx-3xx-5
*March 4, 2010*

**4th grade**

what kind of triangle has all 3 angles that are all less than a right angle?
*March 3, 2010*

**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.
*March 1, 2010*

**6th grade**

the industrial revolution helped provide jobs in europe
*February 25, 2010*

**Improving Your Writing**

I am also doing this same exam and confused of all the above! Someone please help us!!!!
*February 24, 2010*

**5th Grade Math**

What website can I go to to help me with my math?
*February 12, 2010*

**arithmetic**

how do you write this as a unit rate 25000/5
*February 9, 2010*

**college physics**

Vector A points in the negative x direction. Vector B points at an angle of 27.0 degress above the positive x axis. Vector C has a magnitude of 20 m/s and points in a direction 39.0 degress below the positive x axis. Given that A+B+C=0, find the magnitudes of A and B.
*February 8, 2010*

**math**

it is given that 'y' is 90% rewriting the equation using this value gives 0.9 = 0.0102x + 0.644 now simply solve for x
*January 28, 2010*

**5th grade**

what do moms use to read?
*January 25, 2010*

**5th grade speeling**

I need the analogy to figure out the word curved
*January 19, 2010*

**Waves-Science**

I had a couple of questions on the topic of Waves-Sound and Light. 1. What is the source of all waves? *Vibration* 2. In one word, what is it that moves from source to receiver in a wave motion? *Energy* 3. Does the medium in which a wave travels move with the wave? *No* 4. ...
*January 7, 2010*

**englisd-french**

Months (they are not capitalized.) janvier février mars avril mai juin juillet août septembre octobre novembre décembre Seasons le printemps (spring) l'été (summer) l'automne (fall, autumn) l'hiver (winter) I don't understand ...
*January 7, 2010*

**French**

1. à/Jean/allons/un/Nous/donner/pantaloon 2. Chapeaux/porte de/ne/pas/Lucie 3. professeur/Le/donne/examens/ne/d’/pas/faciles **I thought this one was=Le professeur ne donne pas faciles d’examens.
*January 7, 2010*

**French**

I need to know if either un, une, des, or de (d’) go in the following blanks. 1. Le professeur ne donne pas____ devoirs aujourd’hui. 2. Le père de Luc a _____ nouvelle voiture américaine. 3. Nous avons ______ amis à Berlin. 4.Le banquier porte ...
*January 7, 2010*

**French**

I need help unscrambling these words to form sentences in French. 1. Je/des/cherche/bibliothèque/à/livres/la 2. à/Jean/allons/un/Nous/donner/pantaloon 3. Chapeaux/porte de/ne/pas/Lucie 4. professeur/Le/donne/examens/ne/d’/pas/faciles **I thought this ...
*January 7, 2010*

**Intergarted Science**

I had a couple of questions on the topic of Waves-Sound and Light. 1. What is the source of all waves? *Vibration* 2. In one word, what is it that moves from source to receiver in a wave motion? *Energy* 3. Does the medium in which a wave travels move with the wave? *No* 4. ...
*January 7, 2010*

**physics =(**

A person on a small, 7.00 meter high, hill aims a water-balloon slingshot straight at a friend hanging from a tree branch 4.00 meters above and 6.00 meters away. At the instant the water balloon is released at 7.00 m/s, the friend lets go and falls from the tree, hoping to ...
*December 12, 2009*

**Physics**

Kyle wishes to fly to a point 450 km due south in 3 hours. A wind is blowing from the west at 50 km/hr. Compute the proper heading and speed that Kyle must choose in order to reach his destination on time.
*December 9, 2009*

**Physics**

A football is kicked at 45 degrees and travels 82 meters before hitting the ground. A) What was its initial velocity? B) How long was it in the air? C) How high did it go?
*December 9, 2009*

**physics**

for this question A bullet is fired from a rifle that is held 1.8 m above the ground in a horizontal position. The initial speed of the bullet is 1120 m/s. Find why is the equation just (.5)(9.8)(t^2)=1.8 why dont we have to take in account for initial velocity: (.5)(a)(T^2)+(...
*December 7, 2009*

**physic**

please help me im stuck. A 400 g air-track glider attached to a spring with spring constant 9.00 N/m is sitting at rest on a frictionless air track. A 600 g glider is pushed toward it from the far end of the track at a speed of 94.0 cm/s. It collides with and sticks to the 400...
*December 5, 2009*

**math**

the difference between two numbers is 3. the sum of the numbers is 45. what are the two numbers
*December 3, 2009*

**math**

the profits of Mr/ Lucky's company can be represented by the equation y=-3x^2+18x-4, where y is the amount of profit in hundreds of thousands of dollars and x is the number of years of operation. He realizes his company is on the downturn and wishes to sell it before he ...
*December 1, 2009*

**physics!!!!**

A spaceship passes Earth at a speed such that γ = 112. A creature aboard the vessel does the Mongoian greeting dance that takes it 21 s (on its clock -- bought on a previous visit -- which is why it reads in seconds) to perform. How long will the welcoming committee on ...
*November 30, 2009*

**Phyiscs**

two examples of everyday devices of relativity? besides a gps?
*November 29, 2009*

**United States History**

i think its e right?
*November 28, 2009*

**United States History**

What do the "sick chicken" case (schechter poultry) and Jefferson's objection to hamilton's bank of the United states have in common? A. both- neessary and proper clause B. oppostiion of direct taxation of fed govt C. attempts to control inflation thro bankng...
*November 28, 2009*

**cooking **

the common name for grain is called?
*November 18, 2009*

**cooking**

name the seven principle grains?
*November 18, 2009*

**cooking**

what does more liquid do for a recipe ?
*November 13, 2009*

**cooking**

question why are many eggs used in some recipes?
*November 13, 2009*

**COOKING**

ON MY ASSIGNMENT IT ASKS LIST ALL OF THE LEAVING AGENTS IN EACH RECIPE NOT SURE WHAT THAT MEANS
*November 12, 2009*

**COOKING**

WHAT DOES SUGAR DO IN A RECIPE?
*November 12, 2009*

**cooking**

what does more liquid do to a receipe?
*November 12, 2009*

**cook**

why are many eggs used in receipes
*November 12, 2009*

**math**

a function is defined as every "x" value giving a unique "y" value, if you have a graph then you can tell if it's a function by 'the vertical line test' simply a vertical line placed anywhere on the graph will only cross through the graph once ...
*November 10, 2009*

**Physics**

saying that the tree is stationary would give it a velocity of 0 therefor meaning it has no momentum as mass x 0 = 0 that sort of disproves your whole explanation think about the question too, what does the Law of Conservation of Momentum say? think about what a law is, can ...
*November 9, 2009*

**Chemistry**

apologies M(MgCO3*5H20) = 154 ratio = 70/154 = 0.4545 so 45.5% is water, same process as above just use this value instead
*November 9, 2009*

**Chemistry**

no i don't think the weight will be increasing after getting rid of the water. work out the molar mass of hydrated magnesium carbonate, then find the ratio of water to the whole thing in regard to molar mass eg M(MgCO3*5H20)= 144 M(5H2O) = 70 ratio = 70/144 = 0.486 this ...
*November 9, 2009*

**Chemistry**

sorry i'm a bit confused, what are we trying to find?
*November 9, 2009*

**physics 20 **

acceleration due to gravity must be factored in as the rocket is traveling upwards. since you have chosen up to be positive acceleration down must be negative, making gravity -9.8m/s the equation is still force=mass x acceleration accept the formula used to calculate ...
*November 3, 2009*

**Math**

the second answer would be -70 technically all square roots have two answers, when you multiply two negative numbers you get a positive number
*November 3, 2009*

**9th grade**

3 over the square root of 6
*November 3, 2009*

**algebra**

y=3x+4; -1, 1 2, 10 3, 12 7, 1 find the solution set for each equation , given the replacement set
*November 2, 2009*

**AP 9th grade-Philosophy **

In order to prove this thesis by the Greek Thales, "All substances can be reduced to water." what would i have to do?! im clueless...
*October 27, 2009*

**science**

How are elements represented on a periodic chart?
*October 26, 2009*

**6th grade**

Show me a plot diagram example please.
*October 26, 2009*

**chemistry**

density is given by mass/volume so if the density is 1.53 g/L then we rearrange the formula to find the mass which just happens to be 1.53grams due to there only being 1 litre so depending on whether the question is asking for how many moles of NAOH or how many grams of pure ...
*October 21, 2009*

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