Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 1,726

**GenChemistry**

Exposure to high doses of microwaves can cause tissue damage. Estimate how many photons with a wavelength = 12cm, must be absorbed to raise the temperature of your eye by 3.0 deg C. Assume the mass of the eye is 11g and its specific heat is 4.0 J/gK

**Chemistry**

CaO(s) + 3C(s) > CaC2(s) + CO(g) deltaHrxn = +464.8 kJ/mol-rxn Is the reaction endothermic or exothermic? What is the enthalpy change if 10.0 g of CaO is allowed to react with an excess of carbon?

**Physics**

The A string of a violin is 31 cm long between fixed points with a fundamental frequency of 440 Hz and a mass per unit length of 5.8×10^−4 kg/m. What are the wave speed in the string? What are the tension in the string? What is the length of the tube of a simple wi...

**Chemistry**

Write a nuclear equation for the following: Iodine 131 undergoes beta decay two times Plutonium 239 is an alpha emitter Th 234 undergoes beta decay once and then alpha decay How do I go about writing nuclear equations?

**Chemistry**

Calculate the energy changes associated with each of the following reactions. Label each as endothermic or exothermic. A.) 2(C2H2)+5(O2)------->4(CO2)+2(H2O) B.) N2+O2------>2(NO) C.) NH3+H2O----->NH4OH D.) 2(BrCl)----->Br2+Cl2

**algebra**

K*T=K*T I need help solving for T. How would I do it?

**algebra**

K*T=K*T How would I solve for T?

**10th grade**

how do you calculate the volume of the aluminum block from the apparent change in the volume of water in the cylinder?

**Physics**

The intensity of an earthquake wave passing through the Earth is measured to be 2.5×106 J/m^2 at a distance of 48 km from the source. What was its intensity when it passed a point only 2.0 km from the source? At what rate did energy pass through an area of 3.0 m^2 at 2.0...

**Geometry Please Help**

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

**Geometry Please Help**

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

**Geometry**

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

**Geometry**

/Users/szeringue/Desktop/SCAN0001.JPG Can you help me solve this problem, Please AB=27 BC=x CD=4/3x AD=x AC=? How do I get what AC equals?

**chemistry**

One reaction of iron with hydrochloric acid is represented by the following thermochemical equation. Fe(s) + 2HCl(aq) → FeCl2(aq) + H2(g); ΔH°= –87.9 kJ How much heat is liberated at constant pressure if 0.416 g of iron reacts with 42.0 mL of 0.457 M HCl?

**college chemistry**

Consider the following metals. Metal Specific Heat copper 0.385 J/(g · °C) magnesium 1.02 J/(g · °C) mercury 0.138 J/(g · °C) silver 0.237 J/(g · °C) lead 0.129 J/(g · °C) If the same amount of heat is added to 25.0 g of e...

**chemistry**

From the following information, determine ΔH°f of malonic acid, CH2(COOH)2(s). CH2(COOH)2(s) + 2O2(g) → 3CO2(g) + 2H2O(l); ΔH° = –861.0 kJ Substance ΔH°f (kJ/mol) CO2(g) –393.5 H2O(l) –285.8 A. 2613.1 kJ B. –1540.3 kJ C. &#...

**English**

you're correct

**physical science**

what is non convective rain?

**math**

due to it's shape

**Algebra**

try using the quadradic formula!

**Consumer Math**

1. You are debating about whether to buy a new computer for $800.00 or a refurbished computer with the same equipment for $640.00. If a savings account earns 4.5% APR interest, how much do you really save with a refurbished computer if you put the difference into the savings ...

**Chemistry**

Write the balanced equation and solubility product expression for the solubility equilibrium of Mn3(PO4)2: i thought the answer was Mn3(PO4)2 (s) = Mn^2+(aq) + (PO4)2 ^3- (aq) but thats not right. then for the Ksp expression i thought it was [Mn^2+] [PO4]^2

**Chemistry**

Write the balanced equation and solubility product expression for the solubility equilibrium of Mn3(PO4)2: i thought the answer was Mn3(PO4)2 (s) = Mn^2+(aq) + (PO4)2 ^3- (aq) but thats not right. then for the Ksp expression i thought it was [Mn^2+] [PO4]^2

**Math**

What is the inverse of f(x) = x^2 − 7, x ≤ 0

**chemistry**

The net ionic equations for the following 1. Dissolution of silver oxalate with nitric acid 2. Complexation of the iron(III) by the thiocyanate ion 3. Precipitation of the carbonate ion with barium ion 4. precipitation of the oxalate ion with barium ion 5. precipitation of the...

**Math**

for what values of _ is 2,3_1 divisible by 9? by 3?

**math**

f(x) = -x squared + 1 for x= -3

**physics**

A wave with frequency 11.3Hz and amplitude 48.1 mm moves in the positive x direction with a speed of 5.6 m/s. What is the waves wavelength?

**physics**

A wave with frequency 11.3Hz and amplitude 48.1 mm moves in the positive x direction with a speed of 5.6 m/s. What is the waves wavelength?

**Physics**

If I'm travelling with a bag of objects on the seat next to me and I turn right, which direction does the bag fall and why? What does this have to do with friction, centripetal and inertia

**physics**

what is the SI unit for torque? :)

**college chemistry**

To dilute a solution from 0.600 M to 0.100 M, the final volume must be A. 1/6 the original volume. B. 0.7 L. C. More information is needed to answer this question. D. 6 times the original volume. E. 60 L.

**Kinsesiology**

Which actually are the muscles of the hip?

**chemistry**

What is the net ionic equation for the reaction of formic acid, HCOOH, with NH3? A. H+(aq) + NH3(aq) → NH4+(aq) B. H+(aq) + OH–(aq) → H2O(l) C. HCOOH(aq) + NH3(aq) → NH4+(aq) + HCOO–(aq) D. HCOO–(aq) + H+(aq) + NH3(aq) → NH4HCOO(aq) E. HC...

**chemistry **

thanks!

**chemistry **

Which two orbitals from CV+ and –OH will overlap creating the C-O bond in CVOH? Which of the following accurately shows the orbital interaction that leads to bond formation between CV+ and –OH?

**MATH INTEREST **

IT'S OKAY MY CAPS LOCK IS BROKEN TOO

**College Chemistry**

When 20.0 g C2H6 and 60.0 g O2 react to form CO2 and H2O, how many grams of water are formed?

**English**

They are arguing about rules and regulations again. I have to identify the adverb. again

**chemistry 1A**

If 0.2178 g of a diprotic solid acid is neutralized by 44.81 mL of 0.0953 M NaOH, calculate the molar mass of the solid acid

**English**

For my essay I have to write about a character in Middlemarch by George Eliot and explain how the character is brought to life. How does she (the author) introduce, develop, and represent the character? I'm thinking about writing about Dorothea or Causabon, but I have no i...

**English **

For my essay I have to write about a character in Middlemarch by George Eliot and explain how the character is brought to life. How does she (the author) introduce, develop, and represent the character? I'm thinking about writing about Dorothea or Causabon, but I have no i...

**SOCIAL STUDIES **

WHAT 2 AQUIFERS PROVIDE THE WATER SUPPLY TO HALF THE PEOPLE IN NJ

**SOCIAL STUDIES**

WHAT IS THE SOURCE OF THE DELAWARE RIVER IN NJ?

**English**

For my english class we had to make a list of things that annoy us and we have to do a log entry that "select hits" and develop some clusters. Like i know cluster refers to groups, so things like traffic and red lights can be grouped together (driving), but i dont ge...

**math**

calculate the discriminant of 3x^2 - 4x + 2

**chem buffer**

A & D

**Kennard Dale**

Estimate what the value of G would need to be if you could actually "feel" yourself gravitationally attracted to someone near you. Assume that each person has a mass of 72 kg, the force of attraction is F = 4 N, and the distance of separation is 0.5 m.

**math**

tony is making flower arrangements. he is using 3 different kinds of flowers-roses, daisies, and tulips. each arrangement will have the same number of each kind of flower. he figures that if he uses all the flowers, the greatest number of arrangements he can make is 7. he has ...

**Psychology**

What is an advantage and disadvantage of the Incentive Motivational Theory in Psych?

**English**

Is the infinitive "to use" used as an adjective in this sentence: "In your opinion, what is the easiest word-processing program (to use)?

**English**

Is the infinitive "to use" used as an adjective in this sentence: "in your opinion, what is the easiest word-processing program (to use)?

**Physics**

A car drives straight off the edge of a cliff that is 58 m high. The police at the scene of the accident note that the point of impact is 126 m from the base of the cliff. How fast was the car traveling when it went over the cliff?

**Physics**

you should get 272m/s

**Physics**

sqrt(270^2)+(39.8^2)

**algebra**

5g+4(-5+3g)=1-g my solve(which didnt work tried 5 times) 5g-20+12g=1-g 17g-20=1-g 18g-20=1 18g=21 g=21/18=7/6 where did i go wrong?

**chemistry**

A coin dealer, offered a rare silver coin, suspected that it might be a counterfeit nickel copy. The dealer heated the coin, which weighed 14.0 g to 100°C in boiling water and then dropped the hot coin into 29.5 g of water at T = 15.0°C in an insulated coffee-cup, and ...

**college chemistry**

Use standard enthalpies of formation to determine ƒ¢Horxn for: 2NH3(g) + 3O2(g) + 2CH4(g) ¨ 2HCN(g) + 6H2O(g) in kilojoules. Find the change in internal energy for this reaction in kJ

**English**

The best way to get there is to take the bus. In this sentence is the infinitive phrase "to take" an adjective?

**Foreign Languges**

This is some Greek and Latin root words for my 6th grade gifted homework. Whats the difference between medicus and medicinal?

**5th grade math**

I'm in 6th grade and I've never heard of this.

**physics**

An object is thrown vertically upward with a speed of 22.4 m/s. How high does it rise?

**Physics**

An arrow is launched vertically upward from a crossbow at 98.2 m/s. Ignoring air friction, what is its instantaneous speed at the end of 10.0 s of flight? What is its average speed up to that moment? How high has it risen? What is its instantaneous acceleration 4.20 s into the...

**Physics..help please**

A rifle with a weight of 35 N fires a 4.0 g bullet with a speed of 250 m/s. (a) Find the recoil speed of the rifle. ___m/s (b) If a 700 N man holds the rifle firmly against his shoulder, find the recoil speed of the man and rifle. ___m/s

**Physics..help please**

A 715 N man stands in the middle of a frozen pond of radius 10.0 m. He is unable to get to the other side because of a lack of friction between his shoes and the ice. To overcome this difficulty, he throws his 1.2 kg physics textbook horizontally toward the north shore at a sp...

**music**

How has Islam shaped conceptions of music for the peoples of the Middle East? I would rather a specific answer instead of saying using wikipedia. Thank you

**Music**

How has Islam shaped conceptions of music for the peoples of the Middle East? I would rather a specific answer instead of saying using wikipedia. Thank you

**Chemistry**

How do I find the radius of a sulfide ion?

**Chemistry**

I used coulomb's law to find the force of attraction between the ionic atoms in BeS and BeO. For BeS, F = -6.85x10^29 J/m For BeO, F = -9.078x10^29 J/m Which has the stronger force of attraction? BeO? What does the "-" sign mean?

**chemistry**

Is it true that the greater difference in electronegativity in an ionic compound, the greater attraction between the elements in the compound?

**Chemistry**

I am comparing the ions BeS and BeO. BeS... d=229 pm Force of attraction = -6.856x10^29 J/m BeO... d=199 pm Force of attraction = -9.078x10^29 J/m I used Coulumb's to find this. Can you explain this?... the reasoning why BeS has a greater attraction?

**Chemistry**

How do I find the radium of the sulfide ion in BeS? The radius of Be is 59 pm. I am also given the force between them.

**physics**

An athlete executing a long jump leaves the ground at a 20° angle and travels 7.80 m. (a) What was the takeoff speed? 1._____ m/s (b) If this speed were increased by just 5.0%, how much longer would the jump be? 2.______ m

**physics**

A delivery truck travels 20 blocks south, 24 blocks west and 25 blocks north. What is its final displacement from the origin? Assume the blocks are equal length. Need magnitude of blocks, and direction(counterclockwise from east is positive)

**chemistry**

We add excess NaCl solution (58.44 g/mol) to 64 mL of a solution of silver nitrate (AgNO3 169.88 g/mol), to form insoluble solid AgCl. When it has been dried and weighed, the mass of AgCl (143.32 g/mol) is found to be 1.91 grams. What is the molarity of the original AgNO3 solu...

**Music**

ok, well it says what it is but it doesnt say whether it is classical, folk, or popular...so i have no idea?

**Music**

I'm learning about Asian music and i have 7 terms, and i have to group them into either folk, classical or popular. The 7 terms are khaen, tai thu, metallophone, piphat, ramayana, Lam sing, and gamelan. Which terms fall into each of the 3 groups. Any help is appreciated th...

**Music**

I'm learning about Asian music and i have 7 terms, and i have to group them into either folk, classical or popular. The 7 terms are khaen, tai thu, metallophone, piphat, ramayana, Lam sing, and gamelan. Which terms fall into each of the 3 groups. Any help is appreciated t...

**Music**

I'm learning about Asian music and i have 7 terms, and i have to group them into either folk, classical or popular. The 7 terms are khaen, tai thu, metallophone, piphat, ramayana, Lam sing, and gamelan. Which terms fall into each of the 3 groups. Any help is appreciated th...

**math**

2n-8=3n+3

**Math**

2n+5+7n-8=15

**accounting**

credit revenue $55,000 Debit A/R $8,000 Debit Cash $47,000 Debit Cash $3,000 Credit Unearned Revenue $3,000 Debit Expense Account $7,000 Credit A/P $7,000

**Physics**

A 3.0-kg block is at rest on a horizontal floor. If you push horizontally on the 3.0-kg block with a force of 12.0N it just starts to move. What is the coefficient of static friction?

**math**

Just divide??

**math**

I am trying to find a pattern in these numbers. I have looked for what feels like hours, and can't find it. -3,-9,-14,-42,-47,-141

**Writeacher-geography **

i think im doing the same homework as anika i was just wondering where Dubai and Switzerland came on the top 20 cities in the world of 2005. thankyou

**chemistry**

Naturally occuring chlorine gas has 3 isotopes 35cl-35cl, 35cl-37cl , 37cl-37cl a) mass of one molecule in terms of amu. b) mass of one molecule in terms of grams. c) mass of one mole in terms of grams. d) Naturally occuring Cl has 75% 35cl and 25% 37cl, calculate the mass of ...

**math**

find D from the formula C= pie D WHEN pie= 3.142 and c= 27

**chemistry**

Naturally occuring chlorine gas has 3 isotopes 35cl-35cl, 35cl-37cl , 37cl-37cl a) mass of one molecule in terms of amu. b) mass of one molecule in terms of grams. c) mass of one mole in terms of grams. d) Naturally occuring Cl has 75% 35cl and 25% 37cl, calculate the mass of ...

**calculus**

Lim sin2h sin3h / h^2 h-->0 how would you do this ?? i got 6 as the answer, just want to make sure it's right. and i couldn't get this one (use theorem 2) lim tanx/x x-->0 and also this one (use squeeze theorem to evaluate the limit) lim (x-1)sin Pi/x-1 x-->1

**calculus**

Evaluate the limit or state that it does not exist. lim Root(6+x)-Root(6-x)/x x->0 i kept getting zero which ever way i tried to solve it.. help plz.

**Math**

3=43

**college physical science**

Mass/Density = Volume _11.4_g_ = v 7.87g/cm3 1.45cm3 = v

**Calculus**

lim x-->0+ f(x), where f(x)= x ln x values for x are 1,0.5,0.1,0.05,0.01,0.005,0.001 when i plugged in 1 i got 0 then -.34657 then -.23025 ................... leading up to -0.00690 what is the value of the limit is it approaching 0?? and if it is approaching 0 then why is ...

**calculus**

lim t-->0 h(t), where h(t)= cos(t)-1/t^2. for the table values t is +/- .002 , .0001 , .00005 , .00001 what do you guys get for the value of h(t) and limit?? when i plugged in .002 i got -.499999975 when i plugged in .0001 i got -.5 when i plugged in .00005 i got -.5 when i...

**spanish 1**

1-7 What would you say in the following situations? 1. You are dancing with a friend and accidentally step on his/her toe. 2. A friend gives you a birthday present. What do you say to him/her? How does he/she respond? 3. You want to pass by some people who are blocking the re...

**spanish**

in Latin America, to several friends Your response: ellos Points earned: 0 out of 1 what pronoun would you use??

**spanish**

and then from this i got 2 correct Modelo: You want to greet Mrs. Gutiérrez. It is 10:00 A.M. Buenos días, señora Gutiérrez. 1. You want to greet Mr. Gutiérrez. It is 2:00 P.M. Your response: Buenos días, señor Gutiérrez....

**spanish 1**

i got the first one right need help with other 3, i don't know if it's the grammar or what but the online website is not accepting my answers so help please.

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