# Posts by jane

Total # Posts: 1,644

**physics repost bobpursley**

The energy given off by 300 grams of an alloy as it cools through 50°C raises the temperature of 300 grams of water from 30°C to 40°C. The specific heat of the alloy (in cal/g C ) is: i know Q=CpM(delta T) but what is what? Responses * physics - bobpursley, Monday...

**physics**

The energy given off by 300 grams of an alloy as it cools through 50°C raises the temperature of 300 grams of water from 30°C to 40°C. The specific heat of the alloy (in cal/g C ) is: i know Q=CpM(delta T) but what is what?

**physics please!**

A 0.21 kg block oscillates back and forth along a straight line on a frictionless horizontal surface. Its displacement from the origin is given by x = (16 cm)cos[(16 rad/s)t + π/2 rad] What force, applied to the block by the spring, results in the given oscillation? why ...

**physics**

A 0.21 kg block oscillates back and forth along a straight line on a frictionless horizontal surface. Its displacement from the origin is given by x = (16 cm)cos[(16 rad/s)t + π/2 rad] What force, applied to the block by the spring, results in the given oscillation? why ...

**help with physics please!**

2.50 kg particle (the function U(x) has the form bx2 and the vertical axis scale is set by Us = 2.0 J).(a) If the particle passes through the equilibrium position with a velocity of 55.0 cm/s, will it be turned back before it reaches x = 18.0 cm?(b) If yes, at what position (...

**physics**

THANK YOU SO MUCH!

**physics**

A 0.400 kg ball is shot directly upward at initial speed 40.0 m/s. What is its angular momentum about a point 2.0 m horizontal from the launch point, when the ball is a) at maximum height and b) halfway back to the ground? What is the torque on the ball about the point 2m from...

**college**

1. What is one way the U.S. legal system affects U.S. businesses? There are several ways the legal system can affect businesses but the one way the U.S. legal system affect U. S. businesses are the antitrust law which changed the way businesses operate. This law controlled ...

**10 GRADE GLOBAL**

is it choice 3

**10 GRADE GLOBAL**

one way in which the magna crata,the petition of right and the glorious revolution are similar is that each 1-strenghtened the power of the pope 2-led to the exploration of africalimited the power of the english monarchy 4-settled religious conflicts

**10 GRADE GLOBAL**

soo its choice 2

**10 GRADE GLOBAL**

sorrrrrrrryyyyyyy.. so its choice 1

**10 GRADE GLOBAL**

WELL, MOST RUSSIAN RULERS LIKED TO INVADE OTHER COUNTRIES

**10 GRADE GLOBAL**

I THINK ITS CHOICE 1

**10 GRADE GLOBAL**

THE FOREIGN POLICY OF MANY RUSSIAN RULERS SUPPORTED THE COUNTRYS DESIRE FOR 1.-ACESS TO INLAND CITIES 2.-MORE MINERAL RESOURCES 3.-EXTENSIVE CANAL SYSTEMS 4.-WARM WATER PORTS

**physics**

Oasis B is a distance d = 9 km east of oasis A, along the x axis shown in the Figure. A confused camel, intending to walk directly from A to B instead walks a distance W1 = 20 km west of due south by angle θ1 = 15.0°. It then walks a distance W2 = 32 km due north. If ...

**Math**

Translate into an algebraic expression. The product of 21% and sum number.

**Math**

Solve the following system of equations. x+3y=9 (1) x=3-3y

**math**

Is there a formula to sum the digits between two numbers? eg. 1 to 20 = 1+2+3+4+5+6+7+8+9+1+0+1+1+1+2+1+3+1+4+1+5+1+6+1+7+1+8+1+9+2+0 = ?? I am looking for the numbers 1 to 2008 so I really need a formula! Please help, thank you. Jane

**trig**

Give the measure of the acute angle with each given value to the nearest tenth of a degree. cos A = 0.1 (84.3 degrees) sec D = 1.8 (65.3 degrees) That is all it gives :( How would I go about solving this?

**Accounting Tax**

A taxable corporation faces a flat 35% marginal tax rate. What is the tax savings from an additional $100,000 deduction?

**Account Tax**

Frankland Company is an accrual method company, On December 30, 2003, it received a prepayment of $36,000 from a tenant, who is leasing a warehouse from Frankland. The payment represents the rental for the period January 2004 through December 2006. How much inocme does ...

**algebra**

Karen is 5 feet tall and her shadow measures 7 feet. A flag pole next to her casts a shadow of 28 feet. How tall is the flagpole in feet?

**1st grade**

thanks

**1st grade**

They all have scales. can i used this as a sentence

**1st grade**

He doesn't wants to read Snow White. Is that a sentence

**AP Bio**

Transpiration Lab- I need to calculate the rate for each of the treatments. Here is the data These are the results of an experiment that was done you need to graph the results and answer the questions. Class Average Cumulative Water Loss in ml/m2 Time (minutes) Treatment 0 10 ...

**Help me expand my paper PLEASE**

as many subtopics as possible, and thanks to everyone that contributed

**Help me expand my paper PLEASE**

I'm doing it on overfishing I need subtopics :[

**science-writing-research paper**

I need tips on how to expand a research paper..my subject is overfishing and I need help with what to talk about..like what are some subtopics? Help is greatly appreciated

**haha how do i respond to responses?**

omg i can't believe i just forgot c in part c. it's even called part c! and thank you for the help with part b. i completely forgot about that!

**calc**

i did this problem and it isn't working out, so i think i'm either making a dumb mistake or misunderstanding what it's asking. A particle moves along the x axis so that its velocity at any time t greater than or equal to 0 is given by v(t) = 1 - sin(2pi*t). a. ...

**reading**

what does this mean "by the skin of their teeth"

**science**

what types of materials are volcanoes like Mount St. Helens made of?

**science**

why does a cinder cone have such steep sides? PLEASE HELP THIANKS!

**science**

i found this from my textbook is it right it erupt violently releasing large qualities of ash and gas. its eruptions have rendered more than half of montserrat uninhabitabe. it caused widespread evacautions.

**science**

Describe the processes that have led to the formation of the Soufriere Hills volcano. how have the inhabitants of Montserrat been affected by this volcano?

**Business Communication**

D - I am not so sure about my answer

**Calculus**

There was a typo in last question A company estimates that the cost ($) of producing x units of a certain product is given by: C= 800 + .04x + .002x^2 Find the production level that minimizes the average cost per unit.

**Calculus**

I still do not see what the answer would be . Is x = .001

**Calculus**

Sorry for the typo - you are correct it should be -.002x^2

**Calculus**

Here's one more that I do not understand A company estimates that the cost ($) of producing x units of a certain product is given by: C= 800 + .04x + .0002x^2 Find the production level that minimizes the average cost per unit. Thank you so much

**Calculus**

This is the question - you are designing a rectangular poster to contain 256 in^2 of printing with a 3 " margin at the top & bottom and a 2 " margin at each side. What overall dinmensions will minimize the amount of paper used? Round to the nearest whole inch if ...

**Calculus**

Here's another one that I do not really understand. A company estimates that the cost (in dollars) of producing x units of a certain product isgiven by: C=800 + .04x + .0002x^2. Find the production level that minimizes the average cost per unit.

**HS Calculus**

Having trouble with this questions. Please help. A particle moves on the x-axis so that its position at any time t (is greater than or equal to) 0 is given by x(t) = 2te^-t a) Find the acceleration of the particle at t=0 b)find the velocity of the particle when its ...

**spanish**

How do you say great great grandmother and great great grandfather in spanish?

**college**

What was the result of your IAT, and do you feel that the test produced valid results in your case? o In your opinion, is it difficult to accurately measure prejudice? Why or why not? o Describe other measurements sociologists use to calculate prejudice

**Chemistry**

thx 4 the help.

**Chemistry**

Why might exposure to organic chemicals be a problem? Refer especially to halogenated hydrocarbons and alcohols. Help please. thx

**calculus**

f(x) = cos(x) - (cos(x))^2 for -pi is less than or equal to x is less than or equal to pi 1) x-intercepts? 2) x and y coordinates of all relative maximum points? 3) intervals on which f is increasing? then i have to sketch f, so tips on doing so would be appreciated. thank you!

**Aantomy**

How would damage to inter neurons in the spinal cord affect nervous system function?

**calculus**

thanks!

**calculus**

Find the exact value of: cos(arctan(2) + arctan(3)) Please explain how you got your answer. I have the answer, but I don't know how to get to it.

**i lied. very quick calc problem.**

f(x) = abs(sin(x)), -pi less than or equal to x less than or equal to pi g(x) = x^2 let H(x) = g(f(x)) i got that H(x) would equal sin^2(x). THIS IS WHERE I AM STUCK! find the domain of H. do i still need to account for "-pi less than or equal to x less than or equal to ...

**last calc question, i promise!**

the second one would be x = 2, resulting in the original point (2,1), i think. but other than that, thank you sooooo much!

**last calc question, i promise!**

ALSO ALSO ALSO - on my first calc question (a couple posts down!), i added more to the problem that i forgot, so i need help with that too.

**last calc question, i promise!**

i mean: do i just set (-1-y)/(x+4y) equal to -1/3 AND use the original formula to come up with an answer? like a two-variable system?

**last calc question, i promise!**

given the curve x + xy + 2y^2 = 6... a. find an expression for the slope of the curve. i got (-1-y)/(x + 4y) as my answer. b. write an equation for the line tangent to the curve at the point (2,1). i got y = (-1/3)x + (5/3). but i didn't any answer for c! c. find the ...

**calc again!**

thank you sososososo much! i was pretty sure of these, but i wanted to double-check.

**calc again!**

i got answers for this one, but i feel like i did something wrong. f(x)= 2x+1 when x is less than or equal to 2 (1/2)x^2 + k when x is greater than 2 1) what value of k will make f continuous at x = 2? my answer: i got k = 3 because it would make the two parts of the function ...

**calculus please**

i forgot the part that said "for -pi is less than or equal to x is less less than or equal to pi" this was attached to the f(x) - does it change the answer? the domain?

**calculus please**

given f(x) = abs(sin x) and g(x) = x^2 for all real x: 1) let H(x) = g(f(x)) and write an expression for it. 2) find domain and range of H(x). 3) find an equation of the line tangent to the graph of H at the point where x = pi/4.

**Algebra**

3) ab+mn+an+mb ab + an + mn + mb a(b + n) + m(n+b) (a + m)(b + n)

**Algebra**

6) P = 22 A = 24 2l + 2w = 22 lw = 24 l = 24/w 2(24/w) + 2w = 22 48/w + 2w = 22 48 + 2w^2 = 22w w^2 - 11w + 24 = 0 (w - 8)(w - 3) = 0 w = 8 or 3 l = 3 or 8 dimensions = 3 x 8

**Algebra**

4) GARDEN width = w length = w +5 GARDEN w/CEMENT WALK width = w + 6 length = w + 5 + 6 = w + 11 a = 546 ft sq. a = lw a = (w+6)(w+11) 546 = (w+6)(w+11) 546 = w^2 + 17w + 66 0 = w^2 + 17w - 480 w = (-17 +/- sqrt(289 - 4(1)(-480))/2 w = (-17 +/- sqrt(289 + 1920))/2 w = (-17...

**French**

Can you please unscramble these letters into 4 words with this spacing. xxx xxx xx xxxxxxxx? CPOBETULEEIQSAUL Thank you

**Organic chemistry**

Write contributing (important) resonance structures for each of the following compounds and predict their relative C=O vibrational frequencies based on the importance of the contributing resonance structures. List in them order from highest to lowest frequency. a.) ...

**chemistry**

I am trying to synthesize CH3CH2CH2CH2CL from only 2HC=CH2, and am unsure about which mechanism to use, any ideas?

**chemistry**

I am trying to synthesize CH3CH2CH2CH2CL from only 2HC=CH2, and am unsure about which mechanism to use, any ideas?

**math**

f''(x) = 24x^2(x^2-1) + 6(x^2-1)^2 when is the graph of f concave upward?

**Organic chemistry**

Suggest an appropriate reducing reagent for the following substrates and predict the product of the reaction: a) 2-hexanone b) ethyl 4-nitrobenzoate (reduction of the nitro group) c) hexanal

**history**

oh wow, thank you so much!

**history**

i have a bunch on her rule in my history notes, but i wanted some extra information and she apparently doesn't exist by that name online! she ruled china in place of several child rulers and ruled during a war in maybe the late 1800s? that's all i have and i need more.

**history**

i really need to know who zuxi is and google isn't coming up with anything and for some reason, my last question was deleted. help please?

**history**

Why did westernization fail in the Ottoman Empire?

**Pre Calculus**

42

**chemistry another Q**

Which, 9-fluorenol or 9-fluorenone, would have higher Rf value on a silica gel plate with 30% acetone/70% hexane at the eluent? Explain.

**chemistry**

Calculate the amount (volume) of 5.25% (wt./vol.) NaOCl solution (commercial bleach) required to oxidize 100mg of 9-fluorenol to 9-fluorenone. Whenever appropriate, use balanced chemical equations as a part of your calculation.

**history**

Was Westernization the best policy for China, Japan, Egypt, and the Ottoman Empire? i don't need a direct answer, just links to websites that could help me out with this. google didn't come up with anything for me.

**how children learn**

according to carl jung what are the two main ways that people process information

**Calculus**

Got a midterm worksheet. Realized how confused I am. Here are some questions: lim x^3 + 12x^2 - 5x/5x x->0 Find the indicated limit: lim 11x/absolute value x x->0+

**calculus**

Consider curve given by x^2+ 4y^2= 7 + 3xy.. Three part question A) show that dy/dx = 3y-2x/8y-3x B) Show that there is a point P with x-coordinate 3 at whiich the line tangent to the curve at P is horizontal. Find the y-coordinate of P. C) find the value of d^2y/ dx^2 at the ...

**Calculus**

Find: 1)x^2-y^2=15, normal at (-8,7)

**Eth125**

What was the result of your IAT, and do you feel that the test produced valid results in your case? o In your opinion, is it difficult to accurately measure prejudice? Why or why not? o Describe other measurements sociologists use to calculate prejudice

**Calculus**

I rewrote the quesion y = sqrt (4 + sin 10x)

**Calculus**

y = sqrt (4 + sin 10x)

**Calculus**

More questions on - finding dy/dx 1) y = sqrt 4 + sin 10 x - I am lost again 2) y = 10/sin x answer: - 10 csc x cot x 3) y = sin x/ 8x

**Calculus**

Need help to find dy/dx: 1) y = (sin x) ^-1/3 answer dy/dx = - 1/ 3(sinx) ^4/3 2) y = sqrt 8 + sin(6x) answer - lost

**spelling**

brother is to mother like fly is to? 4 letters and must include scr spr str or thr

**Calculus**

Answer ? - impicit differentiation Find dy/dx & d^2y/dx^2 y^2 - x^2 = 2 is the answer dy/dx=x/y; d^2y/dx^2= y^2-x^2/y^2

**Calculus**

I did miss the sign but would the answer be: 7x^6 - ----- csc^2y

**Calculus**

Here's another one - I think that I am starting to understand it. Find dy/dx by implicit differentiation: x^7 = cot y My answer is csc^2y / 7x^6

**Calculus**

Thanks Remy. I have one more - 2y + 9xy-4=0 I got -9y/2 + 9x

**english**

Neither Shanti nor Neelima have an extra pen. I think

**Calculus**

I am lost. Find dy/dx by implicit differentiation. 1) 5y-2x^2=x-3

**PHysics**

describe briefly how a generator works. Well, I'm in the electricity unit of my course, so would this mean I have to describe how electricity's generated?

**english**

annagrams aeiifglnhpwystThis is an event that will never happen. However, I suppose it could on any given Saturday Night. Here are your letters, you will have 3 left over. A E I I F G L N H P W Y S T

**english**

solve this puzzle make two words you will have one letter left. aeeioumnrrstv

**physics**

In the figure below, a uniform sphere of mass m = 2.50 kg and radius r = 2.4 cm is held in place by a massless rope attached to a frictionless wall a distance L = 10.2 cm above the center of the sphere. (a) What is the tension in the rope? N (b) What is the force on the sphere...

**physicscalculus**

An automobile with a mass of 1310 kg has 3.10 m between the front and rear axles. Its center of gravity is located 1.78 m behind the front axle. The automobile is on level ground. (a) Determine the magnitude of the force from the ground on each front wheel (assuming equal ...