Monday
October 24, 2016

# Posts by justin

Total # Posts: 916

Physics
Suppose a straight 1.25 mm diameter copper wire could just "float" horizontally in air because of the force of the Earth's magnetic field B, which is horizontal, perpendicular to the wire, and of magnitude 5.00 multiplied by 10-5 T. What current would the wire ...
February 10, 2011

language arts peer edit
The Lightning Thief book and movie are different and same in many ways. The book of the Lightning Thief is more interesting and detailed for most people who read the book and watched the movie. The movie sometimes has things that the book doesn’t have and sometimes the ...
February 8, 2011

Language Arts
Is my first paragraph of the essay good? Correct some mistakes. The Lightning Thief book and movie are different and same in many ways. The book of the Lightning Thief is more interesting and detailed for most people who read the book and watched the movie. The movie sometimes...
February 8, 2011

science
what are the defers and the offence of the crocodile?
February 8, 2011

science
what is the lifecycle of the crocodile?
February 8, 2011

science
what are the defence and offence of crocodile?
February 8, 2011

Pre-Algebra
solve for m 2/3m - 5 = n
January 26, 2011

Math
sole for the variable s r=2s - 8
January 26, 2011

Math plz help
1/2c - 1/4 < -3/4
January 25, 2011

math
lionel says the digits in his mystery number have a sum of 6. you say this mystery number if you count by 3's or count by 4's. what is lionel's mystery number?
January 25, 2011

economics
The table provides data on the demand for and the supply of eggs in the United States. At a price of _____________ there would be a surplus. Price (per dozen) \$0.50 \$1.00 \$1.50 \$2.00 \$2.50 Quantity Demanded 90 80 70 60 50 Quantity Supplied 30 50 70 90 100 Answer Question 9 ...
January 21, 2011

criminal procedure
8. A journalist is being compelled to reveal a confidential source of information, but the source would be useful to the government in a criminal investigation, or helpful to a criminal defendant at trial. What constitutional issues are involved? Should the government be able ...
January 19, 2011

criminal procedure
Should members of the news media have greater access than the general public to court proceedings and court records? What about greater access to prisons to interview prisoners? What about greater access to police investigative files?
January 19, 2011

Math - D.E.Q.
The half-life of a radioactive isotope is the amount of time it takes for a quantity of radioactive material to decay to one-half of its original amount. i) The half-life of Carbon 14 (C-14) is 5230 years. Determine the decay-rate parameter  for C − 14.
January 18, 2011

math
A praire vole has an average of 9 babies per litter. if it has 17 litter in season about how many babies are produced?
January 17, 2011

math
8,050
January 17, 2011

math
A koala sleeps an average of 22 hours each day about how many hours does a koala sleeps in a year?
January 17, 2011

physics/dynamics
The position of a ball as its kicked upwards is measured as y(t) =−(4.9 t^2 + 20t + 0.50)m, where t is measured in seconds. Find the vertical component of velocity and acceleration of the ball as a function of time. If the ground is located at yg = 0, ﬁnd the time...
January 12, 2011

math
jim ran the 400-meter dash in 47 seconds. if he ran at a constant rate, about how many meters did he run in a second?
January 4, 2011

intro to algebra
I have a worksheet to do and I have TO SHOW ALL MY WORK: Can you help. If this is the problem 29+n=13 How do I show each step?
December 29, 2010

physics
Thanks
December 15, 2010

physics
20 kg , 30 cm diameter disk is spinning at 300 rpm. How much friction force must be applied to rim to bring the disk to a halt in 3.0s?
December 15, 2010

calculus
The moment of inertia about the pole(origin) of the plane region which is inside the cardiod: r = 1 + cosO and outside the circle r =1. It's mass density is equal to it's distance from the pole..... I need someone who is way smarter than me to help with this one... ...
December 8, 2010

Math
The mass of the solid inside the sphere: x^2+y^2+z^2=1, above the xy plane and below the cone z=SqRT(x^2 + y^2. It's mass density is equal to the square of a distance from the origin, setup in both spherical and cylindrical coordinates. I don't have to evaluate, but i ...
December 8, 2010

chemisty
how many grams of Na are needed to react with H2O to liberate 400mL of H2 gas at STP?
December 8, 2010

Math
Use lagrange multipliers to find the point on the plane x-2y 3z-14=0 that is closet to the origin?(try and minimize the square of the distance of a point (x,y,z) to the origin subject to the constraint that is on the plane) Help me please!
December 7, 2010

.10*(1/2)x+.25x = 9.00 x(.10*(1/2)+.25)= 9.00 x= 9.00 ___(.10*(1/2)+.25) x = 30 Since you times the dimes by 1/2, you take half of x. So Dimes = 15, and Quarters = 30 Check, .10(15)+ .25(30) = 9.00
December 7, 2010

Singing
I am having a total meltdown.... I want to sing, but my voice is too low! HELP!!
December 6, 2010

spanish
You are good. Nothing to add. Good job!
December 6, 2010

Chemistry
What volumes of 0.46 M HNO2 and 0.54 M NaNO2 must be mixed to prepare 1.00 L of a solution buffered at pH = 3.40? a) HNO2 b) NaNO2 answer in L
December 5, 2010

Chemistry
How many moles of NaOH must be added to 1.0 L of 1.4 M HC2H3O2 to produce a solution buffered at each pH? (a) pH = pKa mol (b) pH = 3.07 mol (c) pH = 5.15 mol
December 5, 2010

Physics
a 55 kg skateboarder starts out with a speed of 1.8 m/s. he does +80 J of work on himself by pushing with his feet against the ground. in addition, the friction does -265 J of work on him. in both cases, the forces doing the work are nonconservative. the final speed of the ...
December 4, 2010

math
how do I rewrite using the distributive property 3^2 + (9-3) 3 x (24/8) + 2
December 1, 2010

EXP105: Personal Dimensions of Education (ABA1047G
Identify at least two skills that you that you would like to improve. Provide details on what actions you will do to develop each skill. Who do you consider to be a part of your personal support system? How do they offer support and encouragement to you?
December 1, 2010

science
how much energy is required to raise 5 kg of silver 36 degrees celcius with a specific heat of 234 j/kg degrees celcius
November 30, 2010

Geometry
1. How many sides does a regular polygon have if one exterior angle is 90 degrees? 3 4 5 6 2. The measures of three angles of a quadrilateral are 80, 90, and 103 degrees. Find the measure of the fourth angle. 67 77 87 97 3. The sum of the interior angles of a 7-gon is 900 1,...
November 30, 2010

geometry
1. An exterior angle of a regular polygon measures 30 degrees. What is the measure of an interior angle? 30 60 120 150 2. How many degrees are in each interior angle of a regular pentagon? 50 72 108 120 3. If all of the diagonals are drawn from a vertex of a hexagon, how many...
November 30, 2010

math
draw an rectangle that has an area of 12sq.in and a perimeter that is greater than 25in.?
November 29, 2010

Fine Art
Keystone questions? Hit me up. justintime5492 at yaahoo
November 29, 2010

chemistry
How many liters of 0.250 M HCl would be required to react completely with 7.50 grams of magnesium hydroxide?
November 28, 2010

college
If I combined 25.0 grams of aluminum hydroxide with 75.0 mL of 0.500 M HNO3 how many grams of aluminum hydroxide would be formed?
November 28, 2010

Chemistry
1. State specifically how you would make a conclusive test for an iron (III) salt. 2. Which test for iron (II) ions is conclusive. 3. Suppose you have a solution containing both an iron (II) salt and an iron (III) salt. How would you proceed to identify both Fe2+ and Fe3+ in ...
November 28, 2010

Chemistry
1. State specifically how you would make a conclusive test for an iron (III) salt. 2. Which test for iron (II) ions is conclusive. 3. Suppose you have a solution containing both an iron (II) salt and an iron (III) salt. How would you proceed to identify both Fe2+ and Fe3+ in ...
November 28, 2010

chemistry
A 0.20 M sodium chlorobenzoate (NaC7H4ClO2) solution has a pH of 8.65. Calculate the pH of a 0.19 M chlorobenzoic acid (HC7H4ClO2) solution.
November 28, 2010

chemistry
Calculate the pH of 3.9 10-8 M HNO3.
November 28, 2010

chemistry
Calculate the pH of a 5.20 10-3 M solution of H2SO4.
November 28, 2010

chemistry
What mass of KOH is necessary to prepare 799.9 mL of a solution having a pH = 11.68?
November 28, 2010

chemistry
You have 100.7 g of saccharin, a sugar substitute, and you want to prepare a pH = 5.80 solution. What volume of solution can be prepared? For saccharin (HC7H4NSO3), pKa = 11.70 (pKa = −log Ka).
November 28, 2010

Precalculus
1. What quadrant would the terminal side of the angle of t=4pie/3 be? 2. What quadrant would the terminal side of the angle of t=3pie/2
November 22, 2010

physics
A 2 kg mass on a horizontal friction-free air track is accelerated by a string attached to a 115 kg mass hanging vertically from a pulley as shown. Compare the accelerations when the masses are interchanged, that is, for the case where the 115 kg mass dangles over the pulley, ...
November 19, 2010

biology
u sure?
November 18, 2010

biology
Why can maintaining homeostasis be particularly challenging for multicellular organisms?
November 18, 2010

HELP
How did the Indian reeducation movement affect young Native Americans?
November 17, 2010

physical science
In the cabin of a jetliner that travels at 600 km/h, a pillow drops from an overhead rack into your lap below. Since the jetliner is moving so fast, why doesn't the pillow slam into the rear compartment of the plane? What is the horizontal speed of the pillow relative to ...
November 15, 2010

Chemistry
A compound has the empirical formula CHCl. A 256 mL flask, at 373 K and 750. torr, contains 0.800 g of the gaseous compound. Give the molecular formula.
November 6, 2010

Chemistry
Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. This causes sodium azide (NaN3) to decompose explosively according to the following reaction. 2 NaN3(s) 2 Na(s) + 3 N2(g) What mass of NaN3(s) must be ...
November 6, 2010

Physics
1. A stroboscopic photo of a club hitting a golf ball, such as the photo shown in Figure 6.3, was made by Harold Edgerton in 1933. The ball was initially at rest, and the club was shown to be in contact with the club for about 0.0022 s. Also, the ball was found to end up with ...
November 6, 2010

Discrete Math
7.A group has 9 women and 7 men. d. Suppose 2 members of the group refuse to work together. How many subgroups of 5 can be chosen 8. In how many ways can 16 people be seated: a. In a row, if 4 of the 16 do not want to sit next to one another b. In a row, if 3 of the 16 must be...
November 4, 2010

Discrete Math
7.A group has 9 women and 7 men. d. Suppose 2 members of the group refuse to work together. How many subgroups of 5 can be chosen 8. In how many ways can 16 people be seated: a. In a row, if 4 of the 16 do not want to sit next to one another b. In a row, if 3 of the 16 must be...
November 4, 2010

Math
How do you solve: (-2t)^2(3t^7)^2
October 31, 2010

Math
If the sides of a square are lengthened by 7cm, the area becomes 121cm2. Find the length of a side of the original square.
October 31, 2010

chemistry
What volume of 0.0482 M Ba(OH)2 is required to neutralize exactly 16.10 mL of 0.141 M H3PO4? Phosphoric acid contains three acidic hydrogens.
October 28, 2010

chemistry
Calculate the sodium ion concentration when 72.5 mL of 4.4 M sodium carbonate is added to 32.6 mL of 2.5 M sodium bicarbonate.
October 27, 2010

slope
Which line has a slope of 1/3 and goes through (3, -1)?
October 24, 2010

physics
need some help, A ball with an initial angular velocity of 20.0 rads /s and a rotational inertia of 0.4kgm rolls uphill with an acceleration of -4.00 rad/s . Calculate the net torque acting on the ball. Calculate the angular displacement after 5.00 s.
October 18, 2010

physics
really confused, A 2kg box is sliding east at 50m/s on a frictionless floor when it collides with a 4kg box sliding east at 10m/s. After the collision, the 2 kg box is sliding east at 20m/s and the 4kg block is sliding east at 25m/s. Calculate the coefficient of restitution. ...
October 16, 2010

Math
Solve each equation by factoring: (2x+1)(3x-2)=10 How do you get -4/3 and 3/2 out of this equation? I'm so confused
October 12, 2010

Algebra
Solve the equation by factoring: 6y^2+7y-3=-12y^2-54y+4 The answers are suppose to be -7/2, 1/9
October 12, 2010

physics
A boy walks a total distance of 210 km due North. His starting position is at 20 km and his final position is 34 km. If it takes him 3 hours and 20 minutes to make his trip, what is his velocity? What is his speed?
October 6, 2010

Physics
A skateboarder shoots off a ramp with velocity of 6.5 m/s directed at a 59 degree angle. The end of the ramp is 1.3m above the ground. a)How high above the ground is the highest point that the skateboarder reaches? b) When the skateboarder reaches the highest point, how far is...
October 5, 2010

if you had between 3 and 100 shells and counted by 3's, 4's and 5's and had 2 left over each time how many shells would you have
September 29, 2010

The statment means that the elements that form the salt are completely different when they aren't formed into salt. For example, when the element A, B, C are put together they can form salt, but when if you just looked at A it would be different from the salt because it ...
September 27, 2010

social studies
two examples of lines of lattitudes which can be found on a map?
September 25, 2010

college physics
A 78-kg man stands on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.2 m/s in 0.74 s. The elevator travels with this constant speed for 5.0 s, undergoes a uniform negative acceleration for 1.8 s, and then comes to rest...
September 21, 2010

ethics
What is virtue and how do we acquire it? this is according to aristotle
September 20, 2010

science
on myth busters there was a,project "people escaping from jail using real hair,toilet paper,and sheets i need the independent,dependent,and control variable on each
September 19, 2010

science
i need the independent,dependent ,control group variable on a cat always landing on their feet
September 19, 2010

music
health ins is so you can go to the dr or hospital and wont cost as much as self pay,,disability ins is if you get injured your still covered even if your not working,,life ins is so your funeral arragment will be paid for and tour family wont be struggling with bills after ...
September 19, 2010

ethics
what does kant mean by a good will without qualification?
September 13, 2010

algebra
How big is the solution set for an equation that cannot be solved
September 9, 2010

math
a fireman stood on the middle step of a ladder, shooting water into a burning building, as the smoke lessened, he climbed up 3 steps, and continued his work, the fire got worse, so he had to go down 5 steps, later he climbed up the last 6 steps and was at the top of the ladder...
September 5, 2010

123 you come back to me
August 31, 2010

math
danny has a money market account with \$1,200. the bank offered him a special rate of 5.25% per month. how much money will danny have after the first month
August 5, 2010

college differential equations
Find two linearly independent power series solutions to the diffrential equation. State the first 3 therms of each series: 2x^2y''+xy'-(1+2x^2)y=0
July 28, 2010

algebra
Oh hey im taking algebra.
June 3, 2010

calculus
Sorry for the misunderstanding. The X is a multiplication sign and the 4 is multiplied to the cubed root of 3.
May 23, 2010

calculus
Write the complex number -4 x 3^1/3 - 4i in exponential form. I'm not sure how I use euler's formula to solve for this. A brief explanation would be greatly appreciated.
May 23, 2010

Math
Which of the following conditions does not ensure that a quadrilateral is a parallelogram? A) Both pairs of opposite sides are parallel. B) The diagonals bisect each other. C) A pair of opposite angles are congruent. D) All of the above Can anyone tell me if C is the right ...
May 23, 2010

Math/Albebra
Give the equation of the circle with the given center and radius. Center at (0, 0); radius = 5
May 16, 2010

U.S. and Global Economics
(This homework question was removed due to a copyright claim submitted by K12 Inc.)
May 13, 2010

human growth and developmnet
it is stupid
May 12, 2010

What specific visual film techniques do you see utilized in contemporary television?
May 10, 2010

Chemistry
Itz Balanced.
May 3, 2010

CHEMISTRYYY
consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP?
April 26, 2010

Chemistry!
a)consider the following reaction: Mg(s)+ 2HCl(aq) --> MgCl2 (aq)+H2 (g) What minimum amount of 1.75 M HCl is necessary to produce 27.5 L of H2 at STP? b) What is the freezing point of an aqueous solution that boils at 102.1 C?
April 26, 2010

Chemistry
What is the freezing point of an aqueous solution that boils at 102.1 C?
April 26, 2010

algebra
I was wondering what the answer to this is. (x-7)3 3 means it is cubed i workedit out but i was wondering what it might be.
April 20, 2010

Math
Factor each expression completely. Can you please show me the steps for these. I'm so confused and don't know how to do them. Thank you so much!! kx^3+2kx^2-63kx and 3xz^2+42xyz+99xy^2
April 16, 2010

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