Friday

July 25, 2014

July 25, 2014

Total # Posts: 183

**science**

ZnS(aq) + 2HCl(aq) --> ZnCl2(aq) + 2H2S(g) what happens in this reaction means what changes& colour happens????

**geometric progresions**

The ratio of the sum of the first 8 terms of a G.P. to the sum of the first 4 terms of the same G.P. is 97:81, where the common ratio of the G.P. is a real number. What is the common ratio?

**arithmetic**

The ratio of the sum of the first 8 terms of a G.P. to the sum of the first 4 terms of the same G.P. is 97:81, where the common ratio of the G.P. is a real number. What is the common ratio?

**bio**

How is the oxygen production in 30 seconds related to the rate of the reaction?

**math**

thank u..

**math**

divide the polynomial x^3-3x^2+x+2 by x+2. Express your answer in the form f(x)=d(x)q(x)+r(x).

**math**

factor x^4-3x^3-11x^2+3x+10 completely using the factor theorem.

**physics**

A large, flat, horizontal sheet of charge has a charge per unit area of 2.05 µC/m2. Find the electric field just above the middle of the sheet. kN/C

**physics**

The charge per unit length on a long, straight filament is -87.0 µC/m. (a) Find the electric field 10.0 cm from the filament. Distances are measured perpendicular to the length of the filament. (Take radially inward toward the filament as the positive direction.) MN/C (b...

**physics**

The electric field everywhere on the surface of a thin, spherical shell of radius 0.710 m is measured to be 860 N/C and points radially toward the center of the sphere. (a) What is the net charge within the sphere's surface? nC (b) What can you conclude about the nature an...

**PHYSICS**

An automobile battery has an emf of 12.6 V and an internal resistance of 0.0500 . The headlights together present equivalent resistance 5.60 (assumed constant). (a) What is the potential difference across the headlight bulbs when they are the only load on the battery? V (b) Wh...

**physics**

Two resistors connected in series have an equivalent resistance of 783.4 Ω. When they are connected in parallel, their equivalent resistance is 171.3 Ω. Find the resistance of each resistor. Ω (small resistance) Ω (large resistance

**physics**

A 120-V motor has mechanical power output of 2.20 hp. It is 92.0% efficient in converting power that it takes in by electrical transmission into mechanical power. (a) Find the current in the motor (A) (b) Find the energy delivered to the motor by electrical transmission in 2.9...

**physics**

The quantity of charge q (in coulombs) that has passed through a surface of area 2.08 cm2 varies with time according to the equation q = 4t3 + 5t + 6, where t is in seconds. (a) What is the instantaneous current through the surface at t = 1.08 s? (b) What is the value of the c...

**Healthcare Finance**

accounting practices within health care organization

**12th**

an electron above the earth is balanced by the gravitational force and the electric field of the earth. find the electric field of the earth.

**physics**

Amplitude of the wave is 0.2m. The time period of the vibration is 0.5secs. Calculate the frequency, velocity and the wave length.

**grade 11 math**

Determine two angles between 0°and 360°that have a secant of -4. Round your answers to the nearest degree. There are tw answer 104°( I got this one but there is also 256° I dont have anyidea for this one please explain to me I appreciate your time thankyou sooo...

**grade 11 math**

Determine two angles between 0°and 360°that have a secant of -4. Round your answers to the nearest degree. There are tw answer 104°( I got this one but there is also 256° I dont have anyidea for this one please explain to me I appreciate your time thankyou sooo...

**Chemistry**

Ok thxxx:)

**Chemistry**

Heyy Jiskha!! I need ur help today:) Hope you will help:D My question is that why is supersaturation unstable... I read the explanations for this on many websites but for some odd reason I just cannot get it to sink in my mind. What does it mean by it is unstable how is it uns...

**Grade 11 math**

I don'tquite understand we never learned y and r stuff. We just started this..the chapter is called Angles of rotation. Andwhere did u get the 10 from... and um sorry for bothering you but can u help me do one because there are many..:( Thanks I greatly appreciate you help!

**Grade 11 math**

If the given point is on the terminal arm of an angle A in stadard position. 0 degrees more than or equal too A and less than or equal too 180 degree, find sin A and cos A: a) (6,8) b) (-5,12) Can you tell me how you get it because I do not understand it at all please help!

**math**

write a subtraction story using the numbers 63 and 18

**Physics**

I though that the entire system goes through uniform acceleration.

**Physics**

Hello. I'm having difficulty with this question In the diagram, the coefficient of kinetic friction between the 2.00 kg and the 3.00 kg blocks is 0.300. The horizontal surface and the pulleys are frictionless, and the masses are released from rest. (a) Draw a free body dia...

**Math**

Supplier on-time delivery performance is critical to enabling the buyer’s organization to meet its customer service commitments. Therefore, monitoring supplier delivery times is critical. Based on a great deal of historical data, a manufacturer of personal computers @...

**math**

921 and 129. 9+2+1=12 and 1+2+9=12

**Microeconomics**

You are the manager of a California winery. How would you expect the following events to affect the price you receive for a bottle of wine? You may include graphs if they help illustrate your response. a)The price of comparable import wines decreases b)One hundred new wineries...

**Microeconomics**

The market equilibrium price for coffee beans in Ecuador is $2.75/pound, a price at which growers are unable to make a profit. Due to the lack of profits, many growers have stopped production and the output of coffee beans has fallen from 400 tons per year (capacity for the re...

**math**

23+43

**analytical geometry**

the points M(6,-8) and E(8,6) are on a circle with radius 10 units. Determine the equation of the line equidistant from points M and E

**Math**

A lends altogether Rs 6000 to B and C for two years.B pays Simple Interest @ 10%p.a. and C pays Compound Interest @8 %.If C pays Rs 50 more than B as the interest , how much did A lend to each of them?

**AP calculus AB**

How does Limit as delta x approaches 0 = 4x + 2deltax +1 simplify to 4x +1? I'm supposed to find the derivative using the limiting process orig equation: f(x) 2x^2+x-1

**chemistry**

e) In performing an immunological procedure, you add 2 mL of serum to 8 mL of saline. Two 1:2 serial dilutions are then made. What is the dilution of serum contained in the final tube?

**maths**

in a model of ship the mast is 9m high while. if the length of the actual ship is12m high.if the lenght of the ship is 28m. how long is model of ship?

**Math**

(x^2 -2)(x^3 - 4x + 9) (x^2) (x^3) = x^5 (x^2) (-4x) = -4x^3 (x^2) (9) = 9x^2 (-2) (x^3) = -2x^3 (-2) (-4x) = 8x (-2) (9) = 18 Now, we add the right-hand sides of the equeal sign. x^5 - 4x^3 - 2x^3 + 9x^2 + 8x - 18 x^5 - 6x^3 + 9x^2 + 8x - 18 There I did the 1st one for u. Try...

**English **

I will add a period at the end of "me" in the last sentence. Thank you Sar and Writeacher! You all have been very helpful.

**English **

Most students do not like English class. They think it's a waste of their time and energy. Nobody likes to write papers and take tests. Anyway, you and I don't. My friend Johnny knows a lot about grammar. I am always asking him to help me, with my English homework. He ...

**English **

Please check my work: Proofread the passage looking for grammar, puntuation, and spelling errors. Most students do not like english class. They think think its a waste of there time and energy. An't nobody likes to right papers and take tests anyway? Me and you dont. My fr...

**English**

Thank you Ms. Sue and Writeacher.

**English**

Sorry I made the same mistake again for #1 I think (there, their, they're) son is the quarterback of the team. ---> "their" "Their" is a 3rd person pronoun, but in this sentence it used as a possessive adjective. Question #7 The streets surrounding t...

**English**

Sorry, I made a mistake for #1, the correct answer is - I think (there, their, they're) son is the quarterback of the team. ---> "there" Question #2. She performed (good, well) on the balance beam. ---> "well" (In this sentence well is an adverb t...

**English**

Please check my work. Which word is correct? 1. I think (there, their, they're) son is the quarterback of the team. ---> "there" 2. The strom didn't have as much (affect, effect) on our community as it did no others. ---> effect 3. He is much bigger (th...

**English**

That’s very nice of you & Writeacher to help me out. I appreciated. Thank you both.

**English**

Wow! I’m impress, thank you for let me know that.

**English**

Thank you Ms. Sue.

**English**

Please check my work. Identify whether if this sentence is complex, an exclamation, declarative, or interrogative. The car broke down, but a rescuer van arrived within minutes. ----- Complex

**Eath Science**

I'm sorry. Please forgive me. Ms . Sue, Please check my work on Wednesday, July 20, 2011 at 9:34am. Thank you.

**English**

Please check my work. Identify whether each sentence is complex, an exclamation, declarative, or interrogative. 1. Tim likes soup, so Mary bought tomatoes. ----- Complex 2. Oh no! ----- Exclamation 3. Do you want to play in the Garden? ----- Interrogative 4. In the story, the ...

**English**

Please check my work. Identify whether each sentence is complex, an exclamation, declarative, or interrogative. 1. Tim likes soup, so Mary bought tomatoes. Complex 2. Oh no! Exclamation 3. Do you want to play in the Garden? Interrogative 4. In the story, the author told how us...

**English**

I got it. The (definite article) new (adjective) mail carier (compound noun) finally (adverb) arrived (past tense verb). Thank u again.

**English**

Okay. This will be my finally draft. The (definite article) new (adjective) mail (noun) carrier (noun) finally (adverb) arrived (past tense verb. Thank u both Ms Sue & Writeacher.

**English**

Thank u. Is "mail" a noun or an adjective in the sentence?

**English**

I need to know what part of speech is the word "mail" in the text.

**English**

Please check my work. Correctly identifying the part of speech of each of the word in the sentence. The new mail carrier finally arrived. The (definite article) new (adjective) mail (adjective) carrier (noun) finally (adverb) arrived (past tense verb).

**English**

The word "mail" is a noun or an adjective in the sentence?

**English**

Please check my work. Correctly identifying the part of speech of each of the word in the sentence. The new mail carrier finally arrived. The (definite article) new (adjective) mail (noun) carrier (noun) finally (adverb) arrived (past tense verb).

**chemistry**

for the chemical reaction A+B= C+D, the following experimental data were taken to determine the ratelaw equation at 300K. determine the rate law for the chemical reaction. fromthe experiment data i found out the exponetial value... but 300k part confuses me. the equation i got...

**chemistry**

Calculate the heat of formationof benzene if the heat of combustion of benzene is 3260 kj/mol, given the following enthalpies of formation of the product. enthalpies of formation for O2= 0k (element) enthalpies of formation CO2 = -394kj/mol enthalpies of formation H2O= -285 kJ...

**english**

hay i really really need help!!! im doing a poem project and it invloves explainig what does "no time to turn at beautys glance and watch her feet and how they can dance"means pleasee help me i really need help:)

**biology**

name the gas transporting protein molecule present in the blood ? why this molecule is employed to transport oxygen but not carbondioxide.

**math **

I tried everthing but,I couldnt solve it. Please help me.the answer at the back is 40960.13 question: solve for x and check your solution. logx/log2 + logx/log4 + logx/log8 + logx/log16 = 25 THANK YOU FOR YOUR KIND HELP!!!!

**math**

THANKS ALOT... I GET IT NOW!!!!!!

**math**

THANKS ALOT... I GET IT NOW!!!!!!

**math**

what is inverse of this funtion f(x)=(1 / 3)^x? I think the answer is f-1(x)= log base 1/3 of x, but i know im wrong... please help!!! THANK YOU

**Chemistry**

Magnesium metal reacts with hydrochloric acid to form magnesium chloride and hydrogen gas. Suppose we react an excess of magnesium metal with 13.2 mL of a 3.00 M solution of hydrochloric acid and collect all of the hydrogen in a balloon at 25oC and 1.00 atm. What is the expect...

**math**

A cylinder has a diameter of 80 cm and a length of 45 cm. Another cylinder has the same volume but is 80cm long. What is the diameter of the longer cylinder?

**english**

provided the incorrect steps in resolve the issue

**Math**

Suppose human activity has caused a 0.1 Fahrenheit increase in global temperatures so far, and that this sift will grow exponentially with a doubling time of 10 years. a. How much will temperatures have risen 50 years from now? b. A politician suggests that a crisis can be ave...

**Grade 11 Math**

simplify √(x^5y^8) the answer is x^5/2y^4 does it matter if 5/2 is replaced with 2.5? x^2.5y^4 its the same thing right?

**math grade 11**

simplify √(x^5y^8) the answer is x^5/2y^4 does it matter if 5/2 is replaced with 2.5? x^2.5y^4 its the same thing right?

**math grade 11**

A quadratic function is defined by f(x)= 3x^2+4x-2. A linear function is defined by g(x)= mx-5. what values(s) of the slope of the line would make it a tangent to the parabola

**lever**

a rigid object that is used with an appropriate fulcrum or pivot point to multiply the mechanical force (effort) that can be applied to another object (load).

**math grade 11**

A quadratic function is defined by f(x)= 3x^2+4x-2. A linear function is defined by g(x)= mx-5. what values(s) of the slope of the line would make it a tangent to the parabola.

**math grade 11**

Determine the value of k for which the function f(x)= 4x^2- 3x+2kx+1 has two zeros. check these values in the original equation? i cant figure out the answer to it. It says in the book that it is k<-0.5 or k> 3.5,but i don't know how they got it.

**trig**

the shadow of a tower is 2y meters longer at 30 degree than when it was at 45 degree. find the height of the tower

**math grade 11**

I need help with this question determine the values in k for which the function f(x)= 4x^2-3x+2kx+1 has two zeros. Check these values in the original equation. i don't get how to do it please help me.

**math grade 11**

I need help with this question determine the values in k for which the function f(x)= 4x^2-3x+2kx+1 has two zeros. Check these values in the original equation. i don't get how to do it please help me.

**grade 11 math**

I don't get how to do this. I'm so lost please help me. Determine the equation of the parabola with roots 2+√3 and 2-√3, and is passing through the point (2,5) this is what i did but its the wrong answer: y= a[x + (2+√3)] [x+(2-√3)] 5= a[2 + (2+...

**math grade11**

for -2 < x < +3 and f(x) = 3x^2 - 6x a)determine the domain and range of f(x) b) the eqn of f inverse if f(x) is further restricted to 1 < x < 3. i don't know how to these problems i tried everything please help me

**Grade 11 Math**

i need help doing this question... a quadratic funtion has these characteristics axis of symmetry: -1 x=3 is the x- int y= 32 is the maximum value determine the y int of this parabola.

**accounting**

what will be the adjusting entry if partners take distributions from their business instead of taking salary?

**math grade 11**

i need help with this quretsion ; i dont know if im right, and i dontknwo what do next question expand and simplfy: 4√7(2√3 + 3√6 - √7) my work = 8√21 + 12√42 -4√49 please help me

**math grade 11**

i need help with this quretsion ; i dont know if im right, and i dontknwo what do next question expand and simplfy: 4√7(2√3 + 3√6 - √7) my work = 8√21 + 12√42 -4√49 please help me

**chemistry**

Describe how you would weigh your KHP samples, if you didn’t know about weighing by differences. Mentioning any differences between your method and the method we made you use, explain why we use the technique of weighing by difference.

**grade 11 chemistry **

12.0 g of carbon reacts with 32.0 g of oxygen to form 44.0 g of Co2. if we react 20.0 g of oxygen with 20.0 g of carbon,how many grams of carbon will be used up?..... i have no clue where to start... can u just tell me the steps to solve similar problems like this

**Chemistry 11**

12.0 g of carbon reacts with 32.0 g of oxygen to form 44.0 g of Co2. if we react 20.0 g of oxygen with 20.0 g of carbon,how many grams of carbon will be used up?..... i have no clue where to start... can u just tell me the steps to solve similar problems like this

**Math 11**

for f(x)= squareroot x to h(x)= f(-3x-12) sketch thegraph.... when i did this i did h(x)= f(-3(x+4)) you know the negitve 3 isit reflection on the x ais or the y axis... thank you!!!

**10th grade**

2x + 4x=60 6x=60 x=60/6 so x=10 very simple.....

**physics 12**

im stuck i have no clue where to start, please help me i just know the givens and some claculations. question: kevin stands on he top of a buiulding and he throws an aboject up into the air at a velocity of 16.0m/s at an angle of 25 degrees to the horizontal. if the building i...

**geography**

3. the soil of much of the steppe region of northern eurasia is ... A. very fertile and productive B. lacking in minerals and unproductive C. too cold to produce much food. D. heavily fertiled with chemicals to make it marginally productive.

**social studies**

All of the following statements about Brazil's economy are true except: (A) Because of the development of gasohol, Brazil no longer has to import expensive foreign oil. (B) Industrial developments have destroyed the middle class. (C) Jobs in service industries usually pay ...

**social studies**

Which of the following statements is NOT true in regard to Brazil's interior plateau? (A) It experiences periods of drought. (B) Its soil is often devastated by heavy rains that cannot penetrate the dry, hard ground. (C) Poverty is prevalent in this region. (D) Farmland is...

**math**

x is a perfect square and x+5 is also a perfect square and x-5 is a perfect square.what is the value of x?

**social studies**

The main landforms of Mexico are the Sierra Madres and the (a) central plateau. (b) isthmus of Panama. (c) Amazon Basin. (d) Andes.

**social studies**

8. Four major vegetation regions common to both the United States and Canada are (A)tundra, rain forest, ice cap, and desert scrub. (B)forest, desert scrub, savanna, and continental. (C)tundra, forest, grassland, and highlands. (D)ice cap, grassland, forest, and savanna.

**CHEMISTRY**

I need help with these problems ASAP: I need help setting these problems up: pleas!! (1)Calculate the volume of 1.87 M NaI that would be needed to precipitate all of the Hg+2 ion from 199 mL of a 1.96 M Hg(NO3)2. The equation for the reaction is 2NaI (aq) + Hg(NO3)2 (aq) ---&g...

**geography**

I think the correct answer is: (d) Natural resources are spread out unevenly around the earth.

**geography**

How are natural resources distributed throughout the world? (a) Most natural resources are found in developed nations. (b) Most natural resources lie beneath the ocean floor. (c) Natural resources are distributed evenly among all nations. (d) Natural resources are spread out u...