Saturday

April 19, 2014

April 19, 2014

Total # Posts: 446

**Chemistry**

Nevermind. They were also converting natural log to log10.

**Chemistry**

At 25 C, RT/F = (8.314 J/mol/K *298 K) /(96500 C/mol) =0.0257 volts. My textbook lists 0.0592. What am I doing wrong?

**Chemistry**

Write the balanced net ionic equation for the following? a) Copper metal and zinc ion b) zinc and cupric ion c) Copper metal and hydrogen ion d) zinc metal and hydrogen ion e) iron metal and hydrogen ion f) Chlorine (Cl2) and bromide ion (Br-) g) Chlorine (Cl2) and iodide ion ...

**statistics**

Assuming that the distribution is normal for weight relative to the ideal and 99% of the male participants scored between (–53.68, 64.64), where did 95% of the values for weight relative to the ideal lie? R

**Math**

Two friends cut a large candy bar into equal pieces Harriet ate 1/4 of the pieces nisha ate 1/2 of the remaining pieces 6 pieces were left over how many pieces was the candy bar originally divided into

**Physics**

A block of mass 21.0kg kg slides down a frictionless surface inclined at 33 ∘ ^\circ.To ensure that the block does not accelerate, what is the magnitude of the smallest force that you must exert on it?

**physics**

A figure skater pushes off from rest and glides along a circular path, the radius of which is 3 times her height. What must be her minimum initial velocity in order to come full circle without having to push off a second time?

**math**

The question is a real-life question.

**math**

A figure skater pushes off from rest and glides along a circular path, the radius of which is 3 times her height. What must be her minimum initial velocity in order to come full circle without having to push off a second time?

**math**

how wide is a rectangular table with a length of 2/3 yard and an area of 1/2 square yard

**English**

I think I get want to write now. Thanks!

**English**

My essays on giving people second chances.

**English**

What should the warrant be about in a argumentative essay?

**Chemistry 12**

Given the following [H3O+] or [OH-] and the concentration of the solution calculate the dissociation constant, Ka. [OH-] = 3.9 x 10^(-9) M, with a concentration of 0.50M Answer:1.3 x 10^(-11) How do I get this answer?

**algebra**

Thank u...But how did u get the 162a+9b=.129??

**algebra**

An archer releases an arrow from a shoulder height of 1.39 m. When the arrow hits the target 18 m away, it hits point A. When the target is removed, the arrow lands 45 m away. Find the maximum height of the arrow along its parabolic path. please help!!I know my points are (0,...

**algebra**

An archer releases an arrow at shoulder height. â€¢ Measure the distance from the fl oor to your shoulder when you are standing. Suppose you release an arrow and it hits the target at a point 5 ft above the ground. Sketch a possible parabolic path of your arrow...

**algebra**

A triangle has points A(2, 2), B(2, 4), and C(6, 3) and is reflected over the x-axis. A'B'C' are the coordinates of the reflected image. What is the B' coordinate

**poetry**

I have to choose a poem to analyze and it has to be classroom appropriate. I was wondering is the poem "The Sick Rose" by William Blake appropriate for a grade 12 classroom? Thanks (posted the poem below) O Rose thou art sick. The invisible worm, That flies in the ni...

**(ENGLISH) please check over english work.**

She is young, I guess she is in her twenties. Instead of writing "I" can I use the word daughter?

**(ENGLISH) please check over english work.**

I have finished all of the questions, just need someone to look over them. I have posted these questions before, but someone told me to re-do them and I decided to post them again. Canada Day Love Match My mother stalked her future son in law, convinced he was the one for me....

**poetry**

For Question 1: The persona speaking in the poem is a female who is middle-aged because she can relate to the incidents that the character in the poem is going through. Sounds right when i read it out loud, does it seem right to you?

**poetry**

Alright, but are my ideas alright?

**poetry**

I have done the questions, just need someone to look them over to see if they make sense and are correct. THANK YOU! Canada Day Love Match My mother stalked her future son in law, convinced he was the one for me. Through the crowd at the Forks Market, she kept behind him like ...

**poetry**

Hi, I am analyzing a poem which is Sick Rose by William Blake. O Rose thou art sick. The invisible worm, That flies in the night In the howling storm: Has found out thy bed Of crimson joy: And his dark secret love Does thy life destroy. I need to know the persona in this poem....

**poetry (Pioneer by Dorothy Livesay)**

I think it is B not sure. can someone clearify

**Statistics**

1. A simple random sample of FICO credit rating scores is listed below: 714 751 664 789 818 779 698 836 753 834 693 802 a. Find range, variance, and standard deviation. b. As of this writing, the mean FICO score was reported to be 678. Based on these results, is a FICO score o...

**math **

how do I write 20,000,000+ 70,000+4,000+900 in standard form

**Physical Science**

Judy (mass 45.0 kg), standing on slippery ice, catches her leaping dog, Atti (mass 12kg), moving horizontally at 4.0 m/s. Use the conservation of momentum to find the speed of Judy and her dog after the catch.

**science**

what causes scientific knowledge to change?

**Math (fractions)**

52 - (x/8) = (x/5)

**Math**

Find the 40th term in the sequence: 4,-1, -5,-11

**pre algebra**

I have a cube of 3 by 3 by 3 centimeters , I paint all the surfaces white. After that I'd take my saw, and saw it into cubes of 1 by 1 by 1. I will have 27 cubes after. How many will have no white color on any surface?

**Chemistry**

The following data was obtained from titrating a solution containing 25 mL of 0.0100 M MgCl2 solution, 1 mL of NH3OH buffer, and 10 drops of Calmagite with EDTA. Calculate the concentration of EDTA. Report the answer with three sig figs. Please help it only shows a graph with ...

**Math**

The expression sin 25° cos 47° + cos 25° sin 47° is equivalent to (1) sin 22° (2)sin 81° (3) cos 22° (4) cos 81°

**Math**

1. The expression log 5x is equivalent to 2. Write the equation of a polynomial whose sum of the roots equals -3 and the product of the roots equals 9\2? P.S. - I have been trying to solve these problems on my own and have not been successful at it. Can someone please help ASA...

**statistics**

okay thank you

**statistics**

students who learned English as well as another language simultaneously score worse on the SAT critical Reading exam than the general population of test takers? The mean score among all test takers on SAT Critical Reading exam is 501 A random sample of 100 test takers who lea...

**statistics**

so, for the fist part it will be (501-485)/116= .1379? what is the SE?

**statistics**

do students who learned English as well as another language simultaneously score worse on the SAT critical reading exam than the general population of test takers? the mean score di 501. A random sample of 100 test takers who learned English as another language simultaneously ...

**Calculus**

A cylinder is inscribed in a right circular cone of height 6.5 and radius (at the base) equal to 6. What are the dimensions of such a cylinder which has maximum volume?

**Calculus**

A woman at point A on the shore of a circular lake with radius 2.5mi wants to arrive at the point C diametrically opposite A on the other side of the lake in the shortest possible time. She can walk at a rate of 3.25 mi/hr and row at a rate of 2 mi/hr. Find shortest time.

**Physics**

An electron in the c level of a mercury atom returns to the ground state. Which photon energy could not be emitted by the atom during this process?

**Chemistry**

Calculate the molar mass of a diprotic acid. The reaction reaches the endpoint of the titration with NaOH at 28ml. The initial concentration of NaOH is 0.09792. and the initial mass of the diprotic acid is 0.685g. How do you get to the final answer? All of the options are arou...

**Math**

One jar of peanut butter and 3 loaves of bread cost $6.70. Three jars of peanut butter and 1 loaf of bread cost $9.32. Find the cost of a jar of peanut butter and a loaf of bread.

**physics**

A charged particle with a charge-to-mass ratio of |q|/m = 5.7 × 108 C/kg travels on a circular path that is perpendicular to a magnetic field whose magnitude is 0.86 T. How much time does it take for the particle to complete one revolution?

**Physics**

F=ma F=10x.1 F=.1N

**Budgeting**

A quaint but well-established coffee shop, the Hot New Café, wants to build a new café for increased capacity. It’s expected sales are $800,000 for the first 5 years. Direct costs including labor and materials will be 50% of sales. Indirect costs are estimat...

**math**

A rectangular photograph is mounted on a rectangular card. There is a border ofequal width around the photograph. The perimeter of the card is 40 centimeters longer than that of the photograph. Find the width of the border in centimeters.

**math**

A rectangular photograph is mounted on a rectangular card. There is a border ofequal width around the photograph. The perimeter of the card is 40 centimeters longer than that of the photograph. Find the width of the border in centimeters.

**math**

The owner of a luxury motor yacht that sails among the 4000 Greek islands charges $430 per person per day if exactly 20 people sign up for the cruise. However, if more than 20 people (up to the maximum capacity of 90) sign up for the cruise, then each fare is reduced by $4 per...

**physics**

The membrane that surrounds a certain type of living cell has a surface area of 4.9 x 10-9 m2 and a thickness of 1.2 x 10-8 m. Assume that the membrane behaves like a parallel plate capacitor and has a dielectric constant of 5.5. (a) The potential on the outer surface of the m...

**MATH**

7s-5s+10<30 &what work would i do to get this. Thankyou!

**math 209**

.78=2(3.14)*sqrt.5/g solve for g

**math 209**

the time t for a pendulum to swing back and forth once is called its period and is given by t=2pi*sqrt l/g where l equals the length of the pendulum solve for g

**stoichiometry**

How many liters of H2 are required to react completely with 5.7 liters of O2?

**chemistry**

Tell how to make a 1 M solution of Mg3(PO4)2 and a 0.1 M solution of CaSO4.

**Math**

factor √7x^2-16√7

**math**

which is equal to 435 in? A. 37ft B.36ft C.12yd 3 in D.12ft 3in

**Physics**

As a box is pushed 30 meters across a horizontal floor by a constant horizontal force of 25 newtons, the kinetic energy of the box increases by 300 joules. How much total internal energy is produced during this process?

**math**

The management of Ditton Industries has determined that the daily marginal revenue function associated with selling x units of their deluxe toaster ovens is given by the following, where R '(x) is measured in dollars/unit. R '(x)=-0.1x-40 (a) Find the daily total reven...

**math**

The demand function for a certain brand of CD is given by the following equation where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. p=-0.01x^2-0.1x+6 Determine the consumers' surplus if the wholesale m...

**math**

The demand function for a certain brand of CD is given by the following equation where p is the wholesale unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. p=-0.01x^2-0.1x+6 Determine the consumers' surplus if the wholesale ma...

**math**

Phillip, the proprietor of a vineyard, estimates that the first 9600 bottles of wine produced this season will fetch a profit of $5 per bottle. However, the profit from each bottle beyond 9600 drops by $0.0002 for each additional bottle sold. Assuming at least 9600 bottles of ...

**math**

thanx! :) i got it!

**Stats**

In one study of smokers who tried to quit smoking with nicotine patch therapy, 36 were smoking after one year after the treatment, and 34 were not smoking one year after the treatment. Use a 0.10 significance level to test the claim that among smokers who try to quit with nico...

**Physics**

A soccer ball kicked on a level field has an initial vertical velocity component of 15 meters per second. Assuming the ball lands at the same height from which it was kicked, what is the total time the ball is in the air? [Neglect friction.]

**Math**

Find the absolute maximum value and the absolute minimum value, if any, of the following function. f(x)=1/x^2+2x+8 on [-2,1]

**math**

what is two equvalent fractions of 8 over 36

**Physics- Someone Please Help!!!**

For a I am getting 43 and I don't think that is right and for b I am getting 12 and I don't think that is right either. Are your values any where close to mine?

**Physics- Someone Please Help!!!**

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is placed on the carouse...

**Physics URGENT!!!**

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is placed on the carouse...

**Physics- PLEASE HELP**

A luggage carousel at an airport has the form of a section of a large cone, steadily rotating about its vertical axis. Its metallic surface slopes downward toward the outside, making an angle of 21.0° with the horizontal. A 37.0 kg piece of luggage is placed on the carouse...

**Physics**

3. A 2000 kg sports car moves in a horizontal circular path of 150 m\radius at a constant speed of 80 m\s. a. magnitude of centripetal acceleration b. magnitude of centripetal force

**Physics**

A cannon ball is fired with a velocity of 200 m\s2 at an < of 25° above ground. The total flight time is 45.6 seconds. (Neglect air resistance.) a. Calculate the initial horizontal\vertical components of the velocity b. Calculate maximum height of the cannon ball above ...

**Physics**

1. A rescue plane flying horizontally at an altitude of 500 m and velocity of 300 m\s east drops a food supply packet to plane crash survivors on the ground. The packet falls freely to the ground without a parachute. Assume that the weather is perfect. a. Calculate the time it...

**accounting**

18. Balance sheet and income statement data indicate the following: Bonds payable, 6% (issued 2000, due 2020) $1,200,000 Preferred 8% stock, $100 par (no change during the year) 200,000 Common stock, $50 par (no change during the year) 1,000,000 Income before income tax for ye...

**Science 8R - Homework Check**

2000m= 200000cm The rest are correct!

**Math 8R - Help!!!!**

Hours x pay per hour= total pay 6 2/3 x 27=v 180 dollars

**Physics**

A diver springs upward from a board that is 4.40 m above the water. At the instant she contacts the water her speed is 14.0 m/s and her body makes an angle of 68.8 ° with respect to the horizontal surface of the water. Determine her initial velocity, both (a) magnitude and...

**Physics **

The drawing shows an exaggerated view of a rifle that has been ‘sighted in' for a 91.4-meter target. If the muzzle speed of the bullet is v0 = 392 m/s, there are the two possible angles θ1 and θ2 between the rifle barrel and the horizontal such that the bull...

**math**

11, 121

**physics**

Nevermind, I figured it out. Thanks.

**physics**

A major-league pitcher can throw a ball in excess of 36.2 m/s. If a ball is thrown horizontally at this speed, how much will it drop by the time it reaches a catcher who is 17.0 m away from the point of release? I got -1.08 for the answer but my book is saying its wrong! pleas...

**physics**

The drawing shows an exaggerated view of a rifle that has been ‘sighted in' for a 91.4-meter target. If the muzzle speed of the bullet is v0 = 392 m/s, there are the two possible angles θ1 and θ2 between the rifle barrel and the horizontal such that the bull...

**physics**

A diver springs upward from a board that is 4.40 m above the water. At the instant she contacts the water her speed is 14.0 m/s and her body makes an angle of 68.8 ° with respect to the horizontal surface of the water. Determine her initial velocity, both (a) magnitude and...

**science**

average speed= distance/time 6m/2sec= 3meters/second

**math**

for this problem multiplication/division should be done first, then addition/subtraction

**Science (Physics)**

1.A hiker started to walk from her campsite heading east with a velocity of 5 m\s after 6 seconds, she attained a velocity of 7 m\s. What is the average velocity of the hiker? What is the hiker’s acceleration? If the hiker continues walking for another 60 seconds, how far...

**Chemistry**

filtration is the only possible method.

**math**

if cos x= 2/5, what is the measure of less than x, to the nearest degree?

**Pysc**

Benjamin Whorf argued that because the Inuit have many words for snow, A. they have more ways to describe snow than speakers of other languages. B. they have better perceptual skills than speakers with fewer words for snow. C.they have more uses for snow in their culture. D.th...

**alg 1**

use the method of substitution to solve the system of linear equation 2x-y=5, 9x-4y=22

**Math**

(15 - 2x)0, for x = -3

**math**

3/7 of $250=

**Math - Functions**

Thanks so much, Mr. Steve!

**Math - Functions**

Please help! I have a test tomorrow. I've been working on this forever and just can't figure out the equation. Inputs X - 0, 3, 6, 9 Outputs Y - 1, 2, 3, 4

**Math - Functions**

I've been working on this function for quite awhile and just can't seem to get it. Inputs x 5, 6, 7, ? Outputs y 50, 72, 98, ? I need the equation too. Please help!

**Math**

I've been working on this function for quite awhile and just can't seem to get it. Inputs x 5, 6, 7, ? Outputs y 50, 72, 98, ? Please help!

**English II**

Imagination is a basic factor in correct expository writing.

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