# Posts by dave

Total # Posts: 870

**science**

i want to know what is the common place this element is found in

**science**

what are place to find the element ununbium or copernicium

**MATH**

a 5 b 3 c 7 d 38

**physics**

A rugby player runs with the ball directly toward his opponent's goal, along the positive direction of an x axis. He can legally pass the ball to a teammate as long as the ball's velocity relative to the field does not have a positive x component. Suppose the player ...

**french**

thankyou

**french**

Le gouvernement a décidé de programmer à nouveau ces spots sur les chaînes de radio et télé, accompagnés d'autres recommedations.

**french**

does spots mean commercial i have tried dictionaries and online translators none of them know the word

**Computers**

Operator overloading: Array indexing [] – allow for double indexing [][] I'm not sure how to overload the operator[] for double indexing. Please help if you can. Thanks

**Computers**

The test data I'm using is y = 3. I tried using a trace table, but I get back to 2. Not sure how to get an answer in the form x * Z - y. Any help will be much appreciated. Thanks

**Computers**

Show what the final output of this function will be. The answer will be in the form x * Z - y Private Function F(x as Int, y As Int, z as Int) If (y = 1) then Return 2 Else Return x * Z - y + F(x-1,y-1, z) End If End Function

**Accounting**

Determine the amount to be paid within the discount period for purchase with an invoice price of $7,745, subject to credit terms of 2/10, n30. Explain how you reached your answer.

**Accounting**

Discuss the advantages and disadvantages of sole proprietorships, partnerships, and corporations.

**calculus**

Find an equation for (a) the vertical line and (b) the horizontal line through the given point. (-3.14,0)

**economics**

Suppose that the typical snowboarder/skier visiting Mount Unknown ski resort on a typical day would be willing to pay for lifts up the mountain according to the following schedule. (see graph …url below) 1. Why does the WTP schedule slope downward ? 2. Suppose all skiers ...

**Physics**

Millikan's oil drop experiment suspended a charged oil drop in an electric field. By measuring the size of the drop and using the oil's density, the weight of each drop could be calculated. This allowed the charge of each drop to be found, which was always found to be ...

**Chemistry**

Hi! I have another question. So 1 kcal of heat is added to 1.5 L of oxygen in a container at constant pressure. (1atm). Then volume increases to 3.1L. they want to know total energy change. Now i think the formula is DH=DU + PDV so what i did was DH = 1 kcal + 1atm(3.1-1.5) = ...

**high school**

what?

**Chemistry**

Hi! I have another question. So 1 kcal of heat is added to 1.5 L of oxygen in a container at constant pressure. (1atm). Then volume increases to 3.1L. they want to know total energy change. Now i think the formula is DH=DU + PDV so what i did was DH = 1 kcal + 1atm(3.1-1.5) = ...

**Chemistry**

Hi! I have another question. So 1 kcal of heat is added to 1.5 L of oxygen in a container at constant pressure. (1atm). Then volume increases to 3.1L. they want to know total energy change. Now i think the formula is DH=DU + PDV so what i did was DH = 1 kcal + 1atm(3.1-1.5) = ...

**Chemistry**

sweet thanks GK!

**Chemistry**

A person falls in water at 0 C. After 30 min in the water, he/she suffers from hypothermia, as their body temp drops to 30 C. Since we are water.... we assume the heat capacity is 4.18 J/g/C. 180 Kcal of energy is required to raise the persons temp to 40 C. I need to find the ...

**Chemistry**

Which is the anode and which is the cathode when doing the electrochemistry: Zn or I2/I- Cu or I2/I- Fe or I2/I- Ni or I2/I-

**Critical Thinking**

What is a true, non-subjective, factual claim.

**critical thinking**

what word or phrase shows that a conclusion is up ahead

**Science**

How many Coulombs of charge pass through a 95W amplifier plugged into 110V wall socked over the course of a 2 hour concert?

**Chemistry-Solubility Product**

Why does effervescence when the Group 2 anion precipitate is acidified imply the presence of (CO3)2- ?

**math**

the incompetent bullfighter was by gordan bluddy.

**math**

The acceleration of a particle at a time t moving along the x-axis is give by: a(t) = 4e^(2t). At the instant when t=0, the particle is at the point x=2, moving with velocity v(t)=-2. Find the position of the particle at t=1/2 if you could show me how to get that please

**spanish**

what is wrong with saying llegamos con mi mama en el aeropuerto? should the en el be del?

**chemistry**

a compound made in the first part of an experiment, [Co(NH3)5Cl]Cl2 appeared to be a dark brown/orange/purple color. This product was then used as a reactant to synthesize [Co(NH3)5ONO], which was a red color. how do you account for the differences in color between these two?

**chemistry**

what ions would for from this compound in an aqueous solution? how would i write the equation that forms these ions? [Co(NH3)5Cl]Cl2

**Physics**

Do you go to Connections Academy?

**9th grade**

ms.sue whats the answer?to my question? Thanks,Daves dad

**9th grade**

using only 15 of these letters,tlpuytsiaaganbrnlrog,what do you call a female bug that floats?

**9th grade science**

what do you call a female bug that floats?

**math**

blank times blank equals 140 what is the two blanks

**precalculus**

show that (-1,1), (9,4), (20,6) and (10,1) are the vertices of a rhombus and then find the area of this rhombus?

**9th grade : Algebra**

how do you solve linears

**math**

lula wants to round 76.24491 to the nearest hundreth. how do you do it?

**chemistry**

2 Cl(g) --> Cl2(g) exo-on H2O(l) --> H2O(g) endo-by 2 H2(g) + O2(g) --> 2 H2O(l) exo-on 2 Li(s) + H2O(l) --> 2 LiOH(aq) + H2(g) endo-by 3 NaN3(s) --> Na3N(s) + 4 N2(g)endo-by

**math**

WHAT IS THE RECIPROCAL OF 5 3/4

**business**

why must a business manage information as a resource?

**Home work help**

742

**5th grade**

draw some quadrilaterals. one fifth is blue. one half is yellow.

**AP World History**

is this good, The Han and Roman Empire were important empires during the time of their existence. The Han Empire began around 206 B.C.E and ended 220 C.E. The Roman Empire began around 27 B.C.E. Throughout their existence, Han China saw technology as an important and ...

**AP World History**

i need help!

**Math -5th Grade**

Using on 3, 11, 21, and 24 only once, and using any combination of divide, multiply, addition, and subtraction, what formula can be created to equal 24?

**acton high**

how do you detect the presence of co2 in a liquid

**Macroeconomics**

Can someone check this for me? 1. Where in the US National Income and Product Accounts and the circular flow of expenditure and income do new home sales appear? ANSWER: I said they appear with money going from the households to the goods and services market. 2. How does a fall...

**MATH**

Suppose that g(X)=f(cx). Show from the definition that g'(x)=cf'(cx)

**Calculus**

Find (fg)'(1) if f(1)=1, g(1)=2,f'(1)=3, g'(1)=-3

**Axia College**

I can not believe the amount of errors on this page with spelling etc. There is no problems getting jobs as long as you know your stuff. People usually gripe about the school because they cant handle not having a teacher around. If you are self-paced and do not need constant ...

**help math**

a partial moves along the x-axis so that its velocity at time t, for 0< = t = < 6, is given by a differentiable function v whose graph is shown above. The velocity is 0 at t=0, t=5, and the graph has horizontal tangents at t=4. the areas of the regions bounded by the t-...

**calc help**

t= hours 0 1 3 4 7 8 9 l(t) people 120 156 176 126 150 80 0 concert tickets went on sale at noon (t=0) and were sold out within 9 hours. the number of people waiting in line to purchase tickets at time t is modeled by a twice-differentiable function L for 0< = 0 < = 9. ...

**government**

Why did the South choose to return to a Confederacy despite the failures of this governmental form in the late 18th Century?

**math**

How is doing operations (adding, subtracting, multiplying, and dividing) with rational expressions similar to or different from doing operations with fractions? Can understanding how to work with one kind of problem help understand how to work another type? When might you use ...

**physics/chem**

n Fig. 21-41, three identical conducting spheres initially have the following charges: sphere A, 7Q; sphere B, -8Q; and sphere C, 0. Spheres A and B are fixed in place, with a center-to-center separation that is much larger than the spheres. Two experiments are conducted. In ...

**physics/chem**

(a) What equal positive charges (in Coulombs) would have to be placed on two celestial objects with masses 9.40 x 1027 and 1.99 x 1022 kg to neutralize their gravitational attraction? (b) What mass of hydrogen would be needed to provide the positive charge calculated in (a)? I...

**physics/chem**

Calculate the number of coulombs of positive charge in 261 cm3 of (neutral) water. (Hint: A hydrogen atom contains one proton; an oxygen atom contains eight protons.)

**geography**

Thanks for all the help. I realize this isn't a site for doing other's homework, but this is not for the purpose of a homework assignment, but for creating a map of East Asia. I am merely trying to source outside help due to time constraints.

**geography**

Also the principal roadways; airports, harbors; and railroads in each region would be very helpful too.

**geography**

Need to know the principal rivers, mountains, and bodies of salt and fresh waters within and around China, Taiwan, Japan, North and South Korea. Thanks.

**science**

Describe (with calculations) how you prepare 1.00 L of 0.750 M barium hydroxide solution starting with Solid barium hydroxide

**Math (Geometry)**

the figure at right is a sguere. find an xepression for the area of the shaded region . write yuor answer in standard form.

**English**

chameleon,

**Physics E&M**

Holy bals this is hard

**Health Project**

Could someone help me find a medical supply company presentation which involves information about the products, jobs, services, etc available. I would greatly appreciate that!! Thanks

**Access Database - computers**

I have to make a database to track university apartments in access. I am stuck trying to decide what type of tables and field names i should have. would it make sense to have a table for students including first, last names, address, city, postal code, telephone number table ...

**Physics**

why is the initial speed down equal to 0?

**Chemistry**

don't forget when finding the mass for the volume equation you must add the mass of your solute, citric acid. once you find the total mass, then divide by the density to give you the total volume. Then moles of citric acid divided by your total volume gives you the ...

**math**

how do you find the reference angle of csc,sec, cot? for example: csc theta= 2 times square root of 3 / 2

**chemistry**

The total pressure in a flask containing air and ethanol at 257C is 878 mm Hg. The pressure of the air in the flask at 257C is 762 mm Hg. If the flask is immersed in a water bath at 300C , the total pressure is 980 mm Hg. The vapor pressure of ethanol at the new temperature is...

**chemistry**

When a student plotted ln [vapor pressure of a gas] vs. inverse Kelvin temperature, she obtained a straight line with a slope equal to -9.500 x 10^3 K. According to the Clausius Clapeyron equation, Hvap is kJ/mol.

**Microecon**

If you are given this function: P=1000-40Q where P=price and Q=sales..... How do you get the price elasticity of demand at a price that is $500? At what price, if any is the price elasticity of demand equal to one?

**English**

It takes someone with a really big heart to give to our charity, and you seem like someone who cares more than most

**algebra**

well i redid it and i got this: = x^2 + 4x + 4 - 2x - 4 - 2^2 - 4 / 2 = x^2 + 2x / x divide the x and i get "x+2" is it correct??

**algebra**

wait, i mistyped. it should be: if f(x) = x^2 - 2x, find f(x+2) - f(2) / x divided by x, not 2. sorry...

**algebra**

if f(x) = x^2 - 2x, find f(x+2) - f(2) / 2 the answer is: x+2 but l got: x^2 - 2x - 8 = 0 which is x = 4 or x = -2

**geography**

Sammy goes out to play. His Mother tells him to be home by 5:00. Sammy is almost an hour late, but he has an excuse. He says that he got lost. He tells his mother that when he checked his compasd, it was pointing to the west, so he followed a path in that direction, but still ...

**Math For Business**

A man has decided to invest at most $90,000 in securities in the form of corporate stocks. He has three options: blue chip stocks he assumes will yield a 6% return, growth stocks @ 12%, and speculative stocks @ 20%. No more than 25% of his investment should be in growth and ...

**English rhymes/riddles**

small parts of wild plants

**Calculus**

find the equation of a line tangent to the graph of y = x / (square root of 5x^s +4), at x = 1. am i suppose to take the derivative? if so, then what else?

**American History**

thanks but i'm still lost...

**American History**

Hi, I need help on answering this question: To what extent did foreign affairs shape American domestic politics in the 1790s? -- I know about the competing visions between Hamilton and Jefferson as well as the British and the French... But i'm lost. i don't know which ...

**calculus : related rates**

a balloon rises at a rate of 3 meters per second from a point on the ground 30 meters from an observer. find the rate of change of the angle of elevation of the balloon from the observer when the balloon is 30 meters above the ground... so i drew a small picture depicting it ...

**crt 205**

Wishful Thinking

**algebra**

how do I work this? (-4x^12y^7)^2 (2x^-3y^-2)^2 divided by (5x^-3y^10)^-1 i need step by step help

**algebra**

how do you get that answer???

**algebra**

(2x^2y^-4z^-5)^3 How is the answer 8x^6 _____ y^12z^15

**Science**

What is the mathematical calculations that lead to the theory of Dark matter or Dark energy? What is the calculation for energy in the universe? What is the calculation for matter in the universe? What is the discrepancy between the two calculations? Please note that we don&#...

**Science**

Prior to the detonation of the first atomic bomb, had the scientist been able to prove by theory that the reaction would stop? I assume they did considering they continued with the test. If not, how was Bethe able to calculate the yield of the explosion? It stops because the ...

**physcial science**

Why is a nail attracted to either pole of a magnet, but another magnet is attracted to only one of the poles? Did you post this twice? Please review my answer posted yesterday It looks like my answer to this same question by "jan" did not get posted. It was related ...

**physcial science**

Does a light bulb glow because.... a) there is burning inside b) an electric current glows c) the filament is hot d) a very small current is flowing Wouldn't you think it was because the filament was hot? Of course, a very small current also CAN make a filament hot if the ...

**physcial science**

Does a 5000-watt heater use twice the energy of a 2500-watt heater. What calculation do I need to do to compare these and answer the question? It does while it is on. But if it is controlled by a thermostat, it needs to be on only half as long to maintain the same temperature...

**physcial science**

How do I calculate the orbital velocity of a satellite that is 400 miles above the earth? Set the centripetal acceleration V^2/(R+h) equal to the gravitational acceleration, g * [R/(R+h)]^2 Then solve for V R is the earth's radius and h is the 400 mile height. g is the ...

**Economics**

If Mary takes money from her savings account and buys a T-bond from Jody with that money, it's: A. An expansionary fiscal policy. B. An example of contractionary monetary policy. C. An example of expansionary monetary policy D. An example of neutral (neither expansionary ...

**physcial science**

When a thermometer is placed in a beaker of hot water, WHY does the mercury level DROP, then rise? See my answer below to the same question.

**physical science**

When a thermometer is placed in a beaker of hot water, why does the mercury level drop, rise? The mercury expands when heated and that forces it from the bulb at the base of the thermometer higher into the capillary. But Why does the mercury Drop First , then rise? If the ...

**Economics**

Will the aggregate quantity of goods and services demanded become more sensitive or less sensitive to changes in the price level if an economy becomes closed (that is, as foreign trade disappears)? In terms of the AD/AS diagram, will the AD curve become steeper or flatter? ...

**Purchasing Power of Income/ Economy**

We use the _________ to determine the purchasing power of income. A. Interest rate. B. Real GDP. C. CPI. D. GDP. E. None of the above. Check this site for your answer. http://www.bls.gov/cpi/