Wednesday

July 30, 2014

July 30, 2014

Total # Posts: 176

**Math/Biz Math**

Argh too much!!! Who has time to read all this!

**Math**

(-5a)^2 = 625 but -5a^2 = -125 when a=5 Why? order of operations in this one (-5a)^2 you do what is in inside teh () first which is (-5 times 5) = (-25) and square that = 625 But in this one -5a^2 you so the a^2 first which is 5^2 = 25 then you have -5 times 25 which is -125 1...

**Math**

I am cofussed is this one question or three?

**Algebra**

Okay I am considering, do you have a question?

**math**

Math Homework ;)

**Math for educators**

I think the reason is asking you this because your question makes little sense. When looking for domain and range you are usually working with ordered pairs (x,y) (3,4). Unless you mean range as in Central Tendency, but taht wouldn't have a domain.

**Math/algebra**

Looks right to me :)

**math**

Times 250000 by 0.15 which is 37500 Look us up on Google SecondTeacher

**8th grade Clinton Junior High School**

Divide powers means you subtarct the exponent Example (^ means "to the power of") 5^4 divided by 5^2 = 5^4-2 = 5^2 Secondteacher (look it up on Google) Trev

**Math - Trigonometry**

Verify the following: 1. cos x/(1-sinx)= sec x + tan x 2. (tanx+1)^2=sec^2x + 2tan x 3. csc x = )cot x + tan x)/sec x 4. sin2x - cot x = -cotxcos2x

**physics**

A person jumps from a window 57 meters high and is caught in a firefighter's net which stretches 0.6 meter. To the nearest tenth of a m/s^2, what is the magnitude of the person's acceleration in the net?

**math (percent)**

Both Sam and Sylvia work at a bookstore. During a sale, Sam sold 15 percent more books than Sylvia. If Sam sold 69 books, how many books did Sylvia sell? A. 60 C. 54 B. 58 D. 50 B

**accounting**

thanks

**accounting**

Which of the following would you use to record your checking account transactions? A. A check stub or check book registry B. A deposit slip C. A signature card D. Checks or drafts A

**health**

The Genetic Information Nondiscrimination Act applies to A. life insurers. C. disability insurers. B. health insurers. D. accident insurers. I think (B)

**9th grade Algebra**

2x+y=10

**Chemistry**

Assume that you had 15 nuts (N) and 10 bolts (B). How many N2B molecules could you make by screwing two nuts onto each bolt? There are two nuts for each bolt. We have 15 nuts so we can make 7. I'm supposed to "Show all calculation for full credit." Is there anywa...

**Math/Geometry**

Actually, I'm using the same formula as you. I searched for formulas yielding Pythagorean triples and it listed a few,yours being one. I'm not getting any results though..

**Math/Geometry**

A correct answer will yield me an "A" all SEMESTER, so help is appreciated Question: Can you find a pythagorean triple whose nonhypotunese legs ARE NOT divisible by 12? That is to say that triples like 3,4,5 would not work because a(3)xb(4)=12/12=1 meaing that their ...

**Math/Geometry**

A correct answer will yield me an "A" all SEMESTER, so help is appreciated Question: Can you find a pythagorean triple whose nonhypotunese legs aren't divisible by 12? Whatever the answer, yes or no, it must be proven.

**Chemistry**

I don't know why these aren't posting? Can someone please explain this to me? The maximum number of electrons that can occupy ONE f orbital is: A. 14 B. 6 C. 2 D. 18 E. 10 Wrong Points Earned: 0/2 Your Response: A

**Chemistry *Urgent***

The maximum number of electrons that can occupy ONE f orbital is: A. 14 B. 6 C. 2 D. 18 E. 10 Wrong Points Earned: 0/2 Your Response: A I don't know why that didnt post anything... But can't a f orbital hold 14 electrons? according to my professors online quiz it can&...

**Chemistry *Urgent***

The maximum number of electrons that can occupy ONE f orbital is: A. 14 B. 6 C. 2 D. 18 E. 10 Wrong Points Earned: 0/2 Your Response: A Seriously can't an f orbital hold 14 electrons?

**chem**

What is the energy of one mole of photons with a wavelength of 375 nm? (h = 6.63 x 10-34 J • s, N = 6.02 x 1023) A. 5.30 x 10-19 J B. 2.39 x 105 J C. 2.66 x 10-18 J D. 5.30 x 105 J E. 1.60 x 106 J

**chem**

Thanks guys, brain fart i guess. I wasn't putting together the E=7.26e-19

**chem**

What is the wavelength of light associated with the radiation of 7.26 x 10-19 J/photon? (h = 6.63 x 10-34 J • s)

**Chemistry**

A 230-gram sample of metal at 82 degrees centigrade is added to 632 grams of water at 14.4 degrees centigrade in an ideal calorimeter. The final temperature of the system (water and metal) is 22.8 degrees centigrade. What is the heat acapacity of the metal. The specific heat o...

**Chemistry**

What is the quantity of heat evolved when 111.9 grams of H2O(l) is formed from the combustion of H2(g) and O2(g)? H2(g) + 1/2 O2(g) --> H2O(l) Delta Ho = -285.8 kJ

**science**

Carbon. Wikipedia it.

**Chemistry**

To assay silver content in an alloy, a 13.38 g sample of alloy was dissolved in nitric acid. The addition of 0.53 molar sodium chloride resulted in the precipitation of silver chloride. If the alloy were pure silver, what volume of sodium chloride is needed to precipitate the ...

**Chemistry**

Thank You SOOO much!

**Chemistry**

What volume of 0.7 molar sodium hydroxide is needed to completely neutralize 90.04 mL of 0.4 molar sulfuric acid?

**Chem**

That is what I though, but that is all the question asks... I am assuming they just mean decomposition. ???

**Chem**

The anions sulfite, carbonate and sulfide produce what gassesrespectively?

**Chemistry**

I got C4H5. And it says that is wrong. Can someone help me on this one?

**Chemistry**

I don't know why that didn't post... Complete combustion of a 0.20 mole sample of a hydrocarbon, CxHy, yields 0.80 mol of CO2 and 1.0 mol of H2O. What is the empirical formula for the hydrocarbon? A. C2H5 B. C4H5 C. C4H8 D. C4H10 E. C3H8 I got an answer of C4H5. Is tha...

**Chemistry**

9. Complete combustion of a 0.20 mole sample of a hydrocarbon, CxHy, yields 0.80 mol of CO2 and 1.0 mol of H2O. What is the empirical formula for the hydrocarbon? A. C2H5 B. C4H5 C. C4H8 D. C4H10 E. C3H8 I have C4H8 Correct?

**Chemistry**

(138 g H2SO4)/(98 g H2SO4/mol)/(8 moles S8)x(256 g S8)= 45.1 g S8 Should have been: (138 g H2SO4)/(98 g H2SO4/mol)/(8 moles {{{H2SO4}}})x(256 g S8)= 45.1 g S8 I typed S8 by mistake instead of H2SO4, I had H2SO4 on my paper. Thanks for your help.

**Chemistry**

Ok, I think I might have just had a lightbulb moment. (138 g H2SO4)/(98 g H2SO4/mol)/(8 moles S8)x(256 g S8)= 45.1 g S8 =45.1g S8 <---can someone confirm????

**Chemistry**

Elemental sulfur can form sulfur trioxide when burned. When sulfur trioxide is dissolved in water, it yields sulfuric acid. The net reaction is shown. What mass of sulfur is needed to yield 138 grams of sulfuric acid. S8(s) + 12O2(g) + 8H2O(l) --> 8H2SO4(l) Help?

**math**

8,426. Let x represent the hundreds digit. My thousands digit is twice my hundreds digit --> Thousands= 2X Hundreds= X My hundreds digit is 2 more than my tens digit. --> Tens= X-2 Ones= Y The sum of my tens and ones digit is my thousands digit. --> 2X=(X-2)+Y My tens...

**networking**

there is no way to cause windows xp to retain permissions when an object is copied tor moved to another ntfs volume.

**grammar**

What is verb in the following sentence? There are many boats at the campsite.

**Chem**

2NH3 <--> NH4+ + NH2- In liquid ammonia the reaction represented above occurs. In the reaction, what does the NH4+ act as? A catalyst? And acid & a base? the conjugate acid of NH3? The reducing agent? The oxidizing agent?

**Chem**

Which of the following produces a coordinate complex? H2SeO4 + 2Cl- + 2H+ --> H2SeO3 + Cl2 + H2O S8 + 8O2 --> 8SO2 3Br2 + 6OH- --> 5Br- + BrO3- + 3H2O Ca+2 + SO4-2 -->CaSO4 PtCl4 + 2Cl- --> PtCl6(-2)

**Precalculus**

nevermind i got it. Thanks anyway.

**Precalculus**

.5=e^(-20t) I am assuming this involves logs but we did't really learn logs. Anyone care to walk me thru with a calculator. Have the Ti-83

**Physics**

They Are Vertical with the ball in between them.

**Physics**

A small plastic ball with a mass of 6.50x10^-3 kg and with a charge of +0.150x10^-6 C is suspended from an insulating thread and hangs between the plates of a capacitor. The ball is in equilibrium, whit the tread making an angle of 30 degrees with respect to the vertical. The ...

**managerial econ**

DAMON is Working on it for you so stop posting it!

**physics**

A small plastic ball with a mass of 6.50x10^-3 kg and with a charge of +0.150x10^-6 C is suspended from an insulating thread and hangs between the plates of a capacitor. The ball is in equilibrium, whit the tread making an angle of 30 degrees with respect to the vertical. The ...

**Physics**

A small plastic ball with a mass of 6.50x10^-3 kg and with a charge of +0.150x10^-6 C is suspended from an insulating thread and hangs between the plates of a capacitor. The ball is in equilibrium, whit the tread making an angle of 30 degrees with respect to the vertical. The ...

**Physics**

Velocity I think if it is a distance vs. Time graph, If it was a Velocity vs. Time graph then Acceleration.

**Physics**

A small plastic ball with a mass of 6.50x10^-3 kg and with a charge of +0.150x10^-6 C is suspended from an insulating thread and hangs between the plates of a capacitor. The ball is in equilibrium, whit the tread making an angle of 30 degrees with respect to the vertical. The ...

**Physics**

Two charges are placed between the plates of a parallel plate capacitor. One charge is +q1 and the other is q2= +5.00x10^-6 C . The charge per unit area on each plate has a magnitude of sigma=1.30 x 10^-4 C/m^2. The force on q1 due to q2 equals the force on q1 due to the elect...

**Physics**

Two charges are placed between the plates of a parallel plate capacitor. One charge is +q1 and the other is q2= +5.00x10^-6 C . The charge per unit area on each plate has a magnitude of sigma=1.30 x 10^-4 C/m^2. The force on q1 due to q2 equals the force on q1 due to the elect...

**Physics**

I did it the way you said to solve it and I got a number different than the correct answer.

**Physics**

A 2 kg pendulum bob is hanging from a 30 cm long piece of string. If the pendulum bob is allowed to move in circular motion in a horizontal plane, determine the tension in the string if the angle the string makes with the vertical is 37 degrees. Need Step by step solution.

**Physics**

How would I convert that to m/s

**Physics**

You have a 30g quarter on an old LP turntable at a radius of 30 cm from the turntable's center. If the coefficient of Friction between the coin and the turntable is 0.6, at what speed will the coin slide off the turntable? Hint: this is a circular motion problem. To find t...

**Physics**

NVM you are relating GPE for Horizontal to KE of Horizontal.

**Physics**

Is it vertical vs. Horizontal energy to get the Acceleration?

**Physics**

An object is swinging from a point that is horizontal compared to the lowest point the object will reach (where the rope is vertical). If the length of the rope is 2 meters and the mass of the object is 30 kg, what is the tension in the rope at the bottom of the swing? Need St...

**Chemistry**

Correction: Under part a, that is supposed to be 25.0 grams hydrogen peroxide.

**Chemistry**

N2H4+2H2O2->N2+4H2O a) If you start with 23.0 g of hydrazine and 23.0g of hydrogen peroxide, which substance is the limiting reactant? b) How much of the other chemical is left unreacted? c) Assuming 75% yield, how many grams of water are formed? I have no idea how to do th...

**English**

I need to find the subject and the verb 1.In the!@#$%^&pit the pilot checked the instruments. (pilot is the subject and checked is the verb?) 2.From the kitchen drifted the delicious aroma of spaghetti sauce. (drifted is the verb and aroma is the subject?) 3. In the distance w...

**English**

Oh, Okay-we could see, so we is the subject?!

**English**

2. pilot is the subject? 4. we is the verb and car is the subject? From the kitchen drifted the delicious aroma of spaghetti sauce. (drifted is the verb and aroma is the subject?)

**English**

1.onions and tomatoes is the verb? 3. flowed is the verb? Couple more questions-I don't quite have it- 1. Into the store burst the excited shopper. (burst is the verb and shoppers is the subject?) 2.In the!@#$%^&pit the pilot checked the instruments (instruments is the sub...

**English**

Okay-so were is the verb? 3 more questions-just to make sure! 1.In the garden the onions and the tomatoes sprouted among the other vegetables. (Vegetables is the subject and sprouted is the verb?) 2.The porpoises and dolphins leaped through the hoop. (porpoises and dolphins is...

**English**

Here's another one- Several photographs and candles were on the mantel. I think photographs and candles is the subject and several is the verb?

**English**

I think the subject is messanger and the verb is rode?

**English**

I think rode is the verb and messenger is the subject?

**English**

I need to find the verb and the subject in this sentence and I am having trouble- 1. On and on, through the night, rode the messenger.

**Power**

I want absolute, cosmic power. Can anyone point me in the direction of some useful resources? 6 ways: 1) Avoid becoming a teacher. 2) Watch "Pinky and the Brain." Form your own plan to take over the world. 3) Freeze yourself for several million years. Wake up when hu...

**Math/Financing**

I need help with a math problem. If someone finances an item at an apr rate of 17.99% interest, and pays all charges off in 2 months, what will the total amount paid for the item be. Assuming there is no annual fee and the minimum finance charge is $2.00