Wednesday

April 16, 2014

April 16, 2014

Total # Posts: 2,568

**American Government**

1. Justice Stephen Breyer stated, “people need to understand the importance of the Court as an institution, even though the Court’s decisions may at times be unpopular and possibly wrong,” Explain how this statement relates to the concepts of “Judicial Inde...

**Math**

It is given that the straight line passing through (2,1)and perpendicular to L.

**Math **

the equation of striaght line is 2x-3y+8=0 find the equation of the straight line passing through (4,-2)and parallel to L

**physics**

What is the angular momentum (in kilogram-meter^2/second) of a 300.0 g ball rotating on the end of a string in a circle of radius 1.87 m at an angular speed of 1.50 rad/s? Is there certain equations to find angular momentum for different shapes?

**physics**

A 1350 kg car rolling on a horizontal surface has a speed of 40 km/hr when it strikes a horizontal coiled spring and is brought to rest in a distance of 5.5 m. What is the spring constant (in N/m) of the spring?

**physics**

thanks

**Chemistry**

To produce 3.00 L of a 1.9 M solution of NaOH, how many grams of NaOH must be dissolved?

**Math**

thank you that helped alot

**Math **

ok so the point are A(3,0) and B(-4,6) and the question asks : the images of points A and B after a reflection in the line y=x. what im trying to ask is what axis does it go over the y or x axis?

**Physics**

I used that equation to solve for the contributions from each wire. I accidently used the equation for magnetic field for a loop (instead of this wire equation) the first time I submitted the homework problem. The angle was incorrect the first time I submitted it too, but it i...

**Physics**

The figure below shows two current carrying wires and the directions of the currents they carry. The wires carry the following currents: I1 = 7.1 A and I2 = 8.9 A. Wire 1 is at (0, 5.8) mm; wire 2 is at (15.1, 0) mm; point P is at (15.1, 5.8) mm. Wire 1 is pointing into the pa...

**Math (Algebra)**

I am having a bit of trouble with the question stated below. I am home-schooled and learning math on your own has proven to be quite the difficult task. If someone could please explain how to do this as thoroughly as possible, I would greatly appreciate it. I honestly have no ...

**Chemisty Help**

for each of the molecules below, show the dipole you would expect. you must show the direction of the dipole - arrow head pointing toward the negative end. 1) CF4 2) CH3Cl

**Chemistry**

Addition of which of the following substances will increase the solubility of CuCO3 (s) in water ? CuCO3 ---- Cu^2+ (aq) +2 CO3^2- (aq) 1. Aqueous hydrochloric acid 2. Aqueous sodium carbonate 3. Solid copper (II) carbonate a) 1 only b) 2 only c) 3 only d) 1 and 3 only e) 1,2 ...

**MathLog#4**

But Steve, you used the equation 2x^n-1 rather than 2x^n+1, does that make a difference??

**MathLog#4**

Thank you guys so so so so much! I have been looking at this forever trying to see how to solve it, when it was right in front of me!! :D

**MathLog#4**

Simplify: ((2x^n)^2 - 1)/(2x^n-1) where x is an integer and n is a positive interger. for this one igot the answer the same as 2n^x+1, but will the value of the given expression be even, odd, or either? Please explain. :) Thank Yoo

**MathLog#4**

is the product of two linear functions always a quadratic function? Explain..

**algebra**

the binomial 8y^12+z^6 can be factored into a binomial and a trinomial. the binomial factor is (2y^4+z^2). whats the trinomial?

**Physical Science**

Distinguish between longitudinal and transverse waves. Do all waves fall into one or the other of these categories? If not, give an example of one that does not?

**MathLog#4**

Simplify: ((2x^n)^2 - 1)/(2x^n-1) where x is an integer and n is a positive interger.

**Science**

michelle weighs 900 N. How much pressure does she apply when she stands on her head, if the part of her head touching the floor has a radius of 2cm?

**AP English**

can someone please tell me what Luisa Santiago has to do with the role of women in a Chronicle of a Death Foretold by Gabriel Garcia Marquez?

**poetry, please comment**

I like the theme but your rhyme scheme is throwing me off. Why don't you try rhyming the last two words of each stanza instead. Just because it's a poem doesn't mean it has to rhyme. Hope this helps :)

**math**

sorry i meant simplify instead of simply

**math**

It's like miles per hour except in this case it's miles per minute Miles/minute Then just simply :)

**algebra**

how would u factor 2x^2 +13x-7 =27? please help

**Chemistry**

Consider the equation: A + 4B=3C+3D, when equal masses of A and B are reacted, which is limiting? My possible answers are: A)if the molar mass of A is less than the molar mass of B, then B must be limiting. B) If the molar mass of A is greater than the molar mass of B, then A ...

**Chemistry**

Consider the reaction of magnesium metal with hydochloric acid to produce magnesium chloride and hydrogen gas. If 3.85 mol Mg and 3.85 mol of HCl are reacted, how many mol of oxygen are left over? I balanced the equation and got Mg(OH)2+2HCl=MgCl2+2H2O. Can you please walk me ...

**psychology**

Is community treatment for schizophrenia effective? Think about what constitutes “community” and is it the same everywhere? Explain.

**Calculus**

2. An object is moving along the parabola y = 3x^2. a) When it passes through the point (2, 12), its “horizontal” velocity is dx/dt= 3. What dt is its “vertical” velocity at that instant? b)If it travels in such away that dx/dt=3 for all t,then what happens...

**chemistry**

which of the following chemical substances would you expect to exhibit the greatest degree of hydrogen bonding? A. ethanol B.propanol C. methanol D. butanol

**Pre-Calc**

The Greek mathematician Eratosthenes (ca. 276-195 B.C.) measured the circumference of the earth from the following observations. He noticed that on a certain day the sun shone directly down a deep well in Syene (modern Aswan). At the same time in Alexandria, 500 miles north (o...

**accounting**

The predetermined overhead rate for manufacturing overhead for 2008 is $4.00 per direct labor hour. Employees are expected to earn $5.00 per hour and the company is planning on paying its employees $100,000 during the year. However, only 75% of the employees are classified as ...

**Chemistry**

7.93 mol

**Chemistry**

Refer to the following equation: 4NH3 + 7O2= 4NO2 +6HO, How many moles of ammonia would be required to produce 11.9 mol of water? Can you please walk me through the steps on how to figure this problem?

**english 11**

D D A A B B

**organic chemistry**

gas chromatographic analysis of a mixture of organic compounds gave the following peak areas: 2-hexene= 2.5 2-bromogexane=4.0 2-henanol=1.8, calculate the mole percent compostion of the mixture

**Help please ???**

Verify the given linear approximation at a = 0.Then determine the values of x for which the linear approximation is accurate to within 0.1. (Enter your answer using interval notation. Round your answers to three decimal places.) (1+2x)^(1/4)¡Ö 1 +(1/2)x

**physics**

How far (in meters) above the earth's surface will the acceleration of gravity be 27.0 % of what it is on the surface? can someone please just give me an equation to figure this out please I am lost

**chemisty**

would you do the same thing to find out how many moles of 50 microliters of 18M sulferic acid?

**chemisty**

how do you convert 50 microliters of 2 butanol to moles?

**physics**

What is the maximum speed (in meters/second) with which a 1300 kg car can round a turn of radius 700 m on a flat road, if the coefficent of friction between tires and road is 0.530

**Chemistry 2**

An industrial chemical reaction has a rate law: rate = k [C]. The activation energy for the reaction is 3.0000 x 10^4 J/mol and A = 2.000 x 10^-3. What must be the reaction temperature if a rate of 1.000 x 10^-9 M/s is required and [C] must be kept at 0.03000M. Hint: What must...

**MATH...YUCK!!!H8 IT **

IM DOING A PROJECT FOR SCHOOL AND CAN"T FIND THE ANSWER.... WHY IS Pi so important?

**Math PLEASE HELP ME!!**

why son't you do it yourself. I'm not here to do your homework if you don't know this than that's really sad.

**Calculus**

If I factor it out, it'll be 17t/4 + 500. then plug in 3 17(3)/4+500=512 x 1000 =512,750. therefore the population would be 512,750?

**Calculus**

Could someone explain this question please. Suppose the population (in thousands of a certain species of insect after t months is described by the function p(t)=4t+ (100t)/(t^2+400) + 500. Determine the maximum population in the first three months.

**Calculus-verify **

What is the second derivative of f(x) = 5/3x^(3) - x^(3/2) + 6? Second derivative of f(x) = 5/3x^(3) - x^(3/2) + 6 is f''(x)=10x + 3/(4sqrt of x)

**Science**

Radioactive substance decays so that after t years, the amount remaining, expressed as a percent of the original amount, is A(t)=100(1.6)^(-t). a) Determine the function A’, which represent the rate of decay of the substance. b) what is the half-life for this substance? c...

**Physics**

Yes, I do have calculus. So the acceleration function is -60(0.7t)(In0.7) b) What is the accerlation at t=2s? -60(0.7(2))(In0.7)= 29.996. The acceleration would be 29.99 m/s^2? --------------------------------------- How do I do part c and d?

**Physics**

I have no idea how to do this question. Would be appreciated if someone help =) The velocity of a car is given by v(t)=60(1-[0.7]^t), where v is measured in m/s and t is measured in s. Determine the following: a)What is the acceleration function? b) What is the accerlation at ...

**Calculus**

2. Determine the minimum value of the function f(x)= e^(-x) - 2e^x on the interval -1≤x≤2. Answer is minimum value 7.12?

**Calculus**

I have no idea how to do this question. Would be appreciated if someone help =) The velocity of a car is given by v(t)=60(1-[0.7]^t), where v is measured in m/s and t is measured in s. Determine the following: a)What is the acceleration function? b) What is the accerlation at ...

**Calculus**

1.Determine the maximum value of the function f(x)= 5^x -x^5 on the interval 0≤x≤≤2. 2. Determine the minimum value of the function f(x)= e^(-x) - 2e^x on the interval -1≤x≤2.

**Chemistry**

At a given temperature, the elementary reaction A <=> B in the forward direction is first order in A with a rate constant of 2.60 x 10^-2 s^-1. The reverse reaction is first order in B and the rate constant is 8.50 x 10^-2 s^-1. What is the value of the equilibrium const...

**Calculus**

Determine the point on the curve y^2=4x that is closest to the point (1,0) a) (0,0) b) (1,2) c) (0.5,sqrt of 2)

**Calculus**

Determine the absolute extreme values of f(x)=4√x -2x on the interval [1,4] I found the derivative of f(x)=4√x -2x f'(x)=2/x^(1/2) - 2 - I have no idea what to do now.

**Calculus**

Thank you!

**Calculus**

What values of x is there an absolute minimum for the function y= -1/3x^2 + 2x? I found the derivative of the function which is y'=-2/3x + 2 set it to 0=y'=-2/3x + 2 x=3 What do I do now?

**Calculus**

The fuel efficiency, E, in litres per 100 km, for a car driven at speed v, in km/h is E(v)=1600v/(v^2+6400) a)If the speed limit is 50 km/h, determine the legal speed that will maximize the fuel efficiency. Could someone explain to me why the legal speed is 50 km/h to maximize...

**Calculus**

Could someone help me with these questions. If an equation s(t)=t^3 - 2t^2 + 1 describes an object's motion in metres, at what time t, in seconds, will the object be stationary? a) 1s b) 0s and 4/3s c) 0s d) 4/3s -------------------------------------- A box is to be constr...

**Calculus**

Could someone help me with these questions. If an equation s(t)=t^3 - 2t^2 + 1 describes an object's motion in metres, at what time t, in seconds, will the object be stationary? a) 1s b) 0s and 4/3s c) 0s d) 4/3s -------------------------------------- A box is to be constr...

**Chemistry**

you think you could help me with another? How many moles of chlorine are needed to react with 2.5 moles of sodium?

**Chemistry**

thank you(:

**Chemistry**

6*2=12/1= 12? am i right?

**Chemistry**

How many moles of sodium chloride (salt) can be made from 6 moles of chlorine?

**chemistry**

a gas sample is collected at 16 degrees c and 0.982 atm. if the sample has a mass of 7.40 g and a volume of 3.96 l, find the volume of the gas at stp and the molar mass?

**algebra 2**

solve -x^2+6x-15=0

**Science**

hehehehehehehe

**Chemistry**

a 5.00-g sample of octane is burned in a bomb calorimeter containing 2.00x10^2 h h2o. how much energy, in cal,is released if the water temperature increases 6.00 degrees celcius?

**algerbra**

the length of a rectangle is one foot more than twice its width. If all sides were increased by 7feet the perimeter of the new triangle would be 122 ft. find the new dimensions of the new rectangle

**Animal Behavior**

If someone could give me an example of when developmental homeostasis works in an animal, and when it doesn't. Thanks!!!

**algebra**

One side of a triangle is half the longest side. The third side is 9 meters less than the longest side. The perimeter is 61 meters. Find all three sides.

**statistics**

Using the county auditor's list of households the researcher randomly selected 100 homes and contacted the residents. Of the 100 homes it was found that 62 had cable television. Which of the following are true? The population of interest is the proportion of all homes in F...

**Physical Science**

A 200-L iron tank has a mass of 36 kg. a) Will it float on seawater if empty? b) What mass of potatoes could be added such that the tank would still float? [Note: 1000 L = 1 m3 ]

**Physical Science**

A wooden raft 3 m long x 2 m wide x 20 cm thick floats on a freshwater lake. A) Determine the buoyant force? B) If the raft itself has a mass of 600 kg, how many 65-kg people could it support?

**physics**

A wire having mass per unit length of 0.440 g/cm carries a 2.80 A current horizontally to the south. What are the direction and magnitude of the minimum magnetic field needed to lift this wire vertically upward?

**algebra**

the price of a car depricates over time at a rate of approximately 18% according to the formula (C)t=36,500(0.82)^t. what was the inital cost of the car? what will the car be worth in 4 years? when will the car be worth less than 5,000?

**Physics**

A penny is placed at the outer edge of a disk (radius = 0.159 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.50 s. Find the minimum coefficient of friction necessary to allow the penny to rotate along with th...

**Physics**

A penny is placed at the outer edge of a disk (radius = 0.159 m) that rotates about an axis perpendicular to the plane of the disk at its center. The period of the rotation is 1.50 s. Find the minimum coefficient of friction necessary to allow the penny to rotate along with th...

**physics**

A 32.2-kg child swings on a rope with a length of 6.06 m that is hanging from a tree. At the bottom of the swing, the child is moving at a speed of 4.2 m/s. What is the tension in the rope?

**Physical Science**

Where did you get the 19.6 from? Also what formula are you using? The Vf^2 = Vo^2 + 2g*d....i've never seen that before

**Physical Science**

A 3-kg stone is dropped from a height of 100 m. Find its kinetic and potential energies when it is 50 m from the ground.

**SCIENCE**

I have a homework pqage for kindergarten that says Petal Patterns. Label each pattern. I'm not sure what the teacher is looking for. Can anyone help me?

**science**

what is the conclusion for what types of water will make a carrot softer

**biology**

1) I can't finish my homework due to this one question, please tell me where I can find this question, thanks! What are levels of protein structure of Angiosperms?

**physics**

A car drives off a sheer cliff, moving horizontally at 17.2 m/s. If the base of the cliff is 14.4 meters below, estimate how long does the car remains in the air.

**physics**

A car drives off a sheer cliff, moving horizontally at 17.2 m/s. If the base of the cliff is 14.4 meters below, estimate how long does the car remains in the air.

**chemistry**

how many grams are contained in 500.g of a 25% solution of H2SO4?

**physics**

A golf ball is struck with a five iron on level ground. It lands 92.7 m away 4.40 s later. What was (a) the direction and (b) the magnitude of the initial velocity?

**Literature**

theseus talking about plays

**chemistry**

Calculate the molarity of 2.05 L of a solution containing 1.51 g of dissolved KBr

**chemistry**

What is the molarity of an aqueous solution containing 43.7 g of glucose (C6H12O6) in 1.1 L of solution?

**Algebra**

Rachel and Lindsay are in third place in a race. Due to a time penalty, they must start the next leg 90 minutes after the second place team. If rachel and lindsay travel at an average rate of 16.8 mph and the second place team travels at an average rate of 14 mph, how long wil...

**Science**

I learned the formula to be v=gt...why are you subtracting? Also what is vf and vi?

**Science**

a ball is thrown upward at a speed of 12 m/s. It will reach the top of its path in about: a) 0.6 sec b) 1.2 sec c) 1.8 sec d) 2.4 sec Please explain how you find the answer!!! I cannot figure it out

**pre calculus**

The graph of a one-to-one function is shown below. Draw the graph of the inverse function, f^(-1) , and submit it to the Dropbox. Please show your work

**physics**

A 200g mass attached to a horizontal spring oscillates at a frequency of 2.0 Hz. At one instant, the mass is at x= 5.0cm and has v= -30cm/s. find amplitude

**chemistry**

How can I group white substances into 2 groups according to their properties&list the properties of each group? Calcium carbonate, citric acid, sucrose, Phenyl salicylate, Potassium iodide,and Sodium chloride Also, which of them dissolves in water and which has solubility in e...

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