# Posts by SARA

Total # Posts: 4,536

**Chemistry**

The ionization energies (kJ/mol) of hydrogen (H), nitrogen (N), sodium (Na), and oxygen (O) are 1,312, 1,402, 1,681, and 1,314, respectively. Which element combination is least likely? OH– NO3– NH4+ NaO–

**Chemistry**

Which of the following is a monatomic cation? Br NH4+ SO42– Fr+

**Chemistry**

Which of the following elements is most likely to form an ion that will then form an ionic bond with an ion of a Group 1A element? Pt I Fr Be

**mechanics**

The angled beam ABC in the figure is composed of segments AB and BC joined at B at a 90˚ angle. Both segments have length L and uniform section stiffness EI. The beam is fixed at C and loaded by a downward concentrated force, P, applied at its free end A. You will use ...

**mechanics**

Beam ABC in the figure is composed of segment AB of length L and uniform section stiffness EI joined to segment BC of length L and uniform section stiffness 2EI. The beam is fixed at C (x=2L) and loaded by a downward concentrated force, P, applied at its free end A (x=0). You ...

**chemistry**

When a 10 g sample of copper oxide is reduced by heating in the presence of carbon monoxide, how many moles of copper are formed?

**English**

I have to write a compare and contrast essay on "the pedestrian ,"the murderer" , and "there will come soft rains" - I need help choosing 3 things to compare in each story

**Chemistry**

What properties do metalloids display, and where are metalloids found on the periodic table?

**Chemistry**

Why did Mendeleev leave gaps in his early periodic table, and what was the ultimate importance of the gaps?

**Physics**

The following calculations are for EM radiation, for which the internal energy U=Vu, where u=u(T)is the total energy density. a) Show that (∂S/∂T)_v=V/T(du/dT), and (∂S/∂V)T=(u+P)/T Note: use the answers in part a in part b and c b) Using Stefan-...

**Physics**

The following calculations are for EM radiation, for which the internal energy U=Vu, where u=u(T)is the total energy density. a) Show that (∂S/∂T)_v=V/T(du/dT), and and (∂S/∂V)T=(u+P)/T Note: use the answers in part a in part b and c b) Using Stefan-...

**Physics**

The following calculations are for EM radiation, for which the internal energy U=Vu, where u=u(T)is the total energy density. a) Show that (∂S/∂T)_v=V/T(du/dT), and and (∂S/∂V)T=(u+P)/T Note: use the answers in part a in part b and c b) Using Stefan-...

**Geometry**

The measure of each interior angle in a regular hexagon is?

**AP Human Geography**

1. What role does migration play in the geographic pattern? 2. How about interaction & isolation after migration takes place? 3. When do dialects begin to become so different that they may be viewed as a different language? 4. How has the Internet contributed to the ...

**Science**

Tellurium is a metalloid. How many valence electrons does tellurium have? 3 4 5 6

**Science**

Which of the following shows three elements in order of increasing conductivity? Ge, O, Mn O, Ge, Mn Mn, O, Ge Mn, Ge, O

**Science**

Inner transition metals are composed of which of the following? metals lanthanides and actinides halogens noble gases

**Science**

Which of the following is a characteristic of nonmetals? Nonmetals are often brittle solids. Nonmetals are often malleable. Nonmetals often conduct electricity. Nonmetals are often ductile.

**Math**

20 times 4 because there is 4 sections per acre so 80 in total.

**Accounting**

In the table given below, reconstruct the remaining information using the available data. [ WHERE THE X's ARE] All of the raw material purchased during the period was used in production. (Indicate the effect of each variance by selecting "Favorable" or "...

**algebra**

The revenue achieved by selling x graphing calculators is figured to be The cost of each calculator is How many graphing calculators must be sold to make a profit (revenue - cost) of at least $466.20?

**algebra**

In one U.S. city, the quadratic function models the median, or average, age, y, at which men were first married x years after 1900. In which year was this average age at a minimum? (Round to the nearest year.) What was the average age at first marriage for that year? (Round to...

**algebra**

The owner of a video store has determined that the cost C, in dollars, of operating the store is approximately given by where x is the number of videos rented daily. Find the lowest cost to the nearest dollar.

**algebra**

The sum of 9 times a number and the reciprocal of the number is positive. Find the numbers which satisfy this condition

**Algebra**

An arrow is fired into the air with an initial velocity of 96 feet per second. The height in feet of the arrow t seconds after it was shot into the air is given by the function Find the maximum height of the arrow.

**Algebra**

You drive 129 miles along a scenic highway and then take a 29-mile bike ride. Your driving rate is 4 times your cycling rate. Suppose you have no more than a total of 5 hours for driving and cycling. Let x represent your cycling rate in miles per hour. Write a rational ...

**math**

what is the rate of this ratio in its lowest term - 48 gallons in 14 mins

**math**

Find the inverse of the function f(X)= 2x^2 - 3

**Math**

A B C

**Chemistry**

How to I find the spectator ions of BaCl2+K2SO4->2KCl+BaSO4

**english**

It is always ___ who pays the bill. he her me us would it be he?

**Math**

Thank you this makes sense now!

**Math**

If four times the square of a positive number is added to the product of -29 and the number, the result is 63. Find the number

**Chemistry**

What is the molarity of a solution prepared by placing 7.2 g of glucose in a volumetric flask and adding water to get 250.0 mL of solution?

**LA check work**

you are wrong the answers are C D A A B B im not sure about 7 and 8. and 9 you have to answer on ur own

**chemistry**

IDK what that means??????

**chemistry**

if 40g of KNO3 is dissolved in 100ml water at 25 C WHAT WILL FINAL TEMP BE? SHOW ALL WORK

**language arts**

Are the answers correct? Did anyone check them?

**SOC 320**

Ha Ha

**Science**

If an ion has 12 protons in its nucleus and 10 electrons outside the nucleus, what is the overall charge on the ion? +2 –2 –1 +1

**Statistics**

the answer will be Q1 (5) Q2 (0.754) Good Luck :)

**College Algebra**

The equationS = 1.3x + 6.4 represents the amount of sales of statin in billions of dollars in 2005. a. According to this equation, people in the U.S spent ---- billion dollars on statins in the year of 2011. b. According to this equation, sales of statin will reach 20.41 ...

**Health science**

Thank you very much I am very sorry for your lost

**Health science**

Make lists of factors that makes your lives stressful and explain how each impacts your physical health and fitness. Please help I'm confused

**physics**

A 330 kg box rests on an adjustable ramp having s = 0.25. The angle on inclination of the ramp is increased until the box begins to slide. At what angle will the box begin to slide?

**Chemistry**

Which of the following procedures involves a physical change in one of the substances? separating an oil from solution by cooling it<--- my answer allowing a nail to rust creating salt by reacting sodium metal and chlorine gas building a model rocket propelled by mixing ...

**Spanish**

Como tu eres? Como es ella/el?

**Music**

Which is an accurate statement? A high pitch will have a high amplitude. A low pitch will have a high frequency.<--- my answer A high pitch will have a high frequency. A low pitch will have a low amplitude.

**Music**

Which term names a musical parameter? tempo notation<----- My answer variation theme

**Music**

What is orchestration? A composer creates various themes in a composition. A composer writes a piece of music. A composer assigns different musical lines to different instruments in a piece of music.<---- My answer A composer weaves different themes into a symphony.

**Music**

Which term is used when a composer shortens a motive by using only part of it or by taking away notes? fragmentation<----- My answer decrescendo theme repetition

**Geometry**

Is a triangle with vertices G(3,2), H(8,5) and K(0,10) a right angle. explain plss, pls. very imp.

**biology**

You are preparing 500 mL of Denaturation Buffer containing 1.5 M NaCl and 0.5 M NaOH. Your stock solutions are 5 M NaCl and 6 M NaOH. How would you prepare the Denaturation Buffer? Include all of the solutions needed to make the buffer. For Nacl, C1V1=C2V2 5*V1=500*1.5 V1=150 ...

**Algebra 2**

Evaluate 4-1.5 using a calculator. Round you’re answer to 3 decimal places

**math**

Do 4 1/2 times 3 1/2, because you have to do the opposite operation to get the missing number.

**Sequences and Series**

use the iterative rule to find the eighth term in the sequence an = 25 − 3n. 176 49<------ My answer 8 1

**English**

A sub-genre that is often concerned more with style and theme than with plot is called: literary fiction<---- My answer magical realism short story psychological fiction

**History**

Which of the following describes a Hindu concept? A shadowy afterlife follows death. The soul is reincarnated after death. God has the same faults as humans. There is one all-powerful god.

**Math**

Which statement is false? A: Every integer is a real number. B: the number zero is a rational number. C: every irrational number is a real number. D: every real number is a rational number****

**Math**

f(x) = log2(x – 3) + 1. How do I find the Domain and Range?

**health**

Digestion, absorption, elimination

**Math Help**

Which binomial is a factor of f(x) = x^4 – 3x^3 – 28x^2 + 36x + 144? (x – 4) (x + 3) (x – 2) (x – 6) I think its the 4th one

**Math**

f(x) = x^3 + 5x^2 + 7x + 3 = (x + 1)(x + 1)(x + 3) What is the multiplicity of the root –1? 2 1 4 3

**physic**

The position function x(t) of a particle moving along an x axis is x = 6.00 - 8.00t2, with x in meters and t in seconds. (a) At what time and (b) where does the particle (momentarily) stop? At what (c) negative time and (d) positive time does the particle pass through the ...

**Georgia state history**

It was actually B but thank you anyway :)

**Georgia state history**

Thank you Ms.Sue :)

**Georgia state history**

which of the following actions does not describe land ownership in royal georgia? A: Women were allowed to own property.****** B: The largest land grants were limited to 500 acres. C: The headright system was used to determine the size of the grant. D: Land could be inherited...

**L.A**

The answers are: B A B I literally just took the test and i got a 100!

**Music**

Which phrase describes the parts of a basic music staff? 5 lines and 6 spaces high and low music notes 5 spaces and 4 lines 5 lines and 4 spaces

**ME**

Problem 3: Consider water as the substance. (a) Find the specific internal energy (Btu/lbm) when T = 500F and P = 375 psia (b) Find the pressure (psia) when T = 500F and v = 0.02024 ft3/lbm (c) Find the specific volume (ft3/lbm) when T = 500F and h = ...

**Help?**

Which units measure the amplitude of sound waves? seconds decibels watts hertz I think its Watts

**Music**

What would a researcher who studies the tango dance music of Argentina be called? ethnomusicologist historical musicologist musical theorist systematic musicologist I think its C but im not sure

**Science**

A farmer wants to determine if a new fertilizer gives her a better crop yield than her old fertilizer. She spreads the old fertilizer in field A, which has a brand new irrigation system. She spreads the new fertilizer in field B, which has an irrigation system that will be ...

**Algebra**

Thanks. Also (Explain how to solve 8 to the 2nd power + 9(12/3*2)-7.) Is the answer 74? Can you walk me through this?

**Algebra**

What is the solution to 5-t=23? My answer is 18. What is the value of b if -7+b=-8? My answer is -1. What is the solution to 5q=-75? My answer is either -25 or -15. What is the solution to -6z=72? My answer is -12. What is the solution to -7+h=12? My answer is 19. What is the ...

**CALCULUS**

How do I determine whether the function is even, odd, or neither. How do I describe the symmetry? ex 1) f(t)= t&2 +2t -3

**CALCULUS-SOMEONE HELP!!**

ok I'm actually stuck on ex.7

**CALCULUS**

I figured out 3 already and got x=-5/3 1.) -3, 3, 4

**CALCULUS**

I figured out 1. How do I do ex 3 & 7

**CALCULUS**

20.) How do I find the zeros of the function algebraically? ex1) f(x)= x^3 -4x^2 -9x +36 ex3) f(x)= 3 +(5/x) ex7) f(x) = (2x^2-9)/ (3-x)

**Chem**

18) Chlorine reacts with potassium bromide to produce potassium chloride and bromine. A) write a chemical equation, using words, to represent the above chemical reaction. My answer: chlorine + potassium bromide ==> potassium chloride and bromine ( I'm pretty sure this ...

**Chem**

No this is freshman chemistry so that's why I asked such a question. Thanks for breaking it down. Although, what are the answers to them? kinda confused.

**Chem**

A carless chemistry student pours 200 grams of methanol, a flammable substance into the sink. Another careless chemistry student causes the bad situation to get even worse by dropping a lit match into the sink. The metanol burns completely with 300 grams of oxygen from the air...

**MATH**

if nCr+2*nCr=nCr4+1*nCr-1

**Algebra**

a = first derivative of the velocity = dv/dt = -9.8 m/s² (negative since gravity is slowing the rock) Therefore, -9.8 m/s² = dv/dt, which implies that v(t) = -9.8t m/s + c Since the rock is thrown up with an initial velocity of 12 m/s, v(0) = 12 m/s Therefore, 12 m/s...

**How many milliliters of a stock solution of 6.00 M**

How many milliliters of a stock solution of 6.00 M HNO3 would you have to use to prepare 0.190 L of 0.490 M HNO3? I used the equation M1V1=M2V2 6M*V1 = 0.190L*0.490 M lead me to this V1=0.190L*0.490M/6.00 M =0.0931 L per M/6.00M =0.0155166L 0.0155166L/1000mL= 0.155166L

**chemistry**

A block of metal has a width of 3.2 cm, a length of 17.1 cm, and height of 3.6 cm . Its mass is 1.5 kg . Calculate the density of the metal.

**college math**

1. If a person jogs at a rate of mi/hr for hr in a week, how many calories will the person burn?

**Science**

4. Which geographic feature marks the last natural obstacle for Georgia's rivers on their way to the Atlantic Ocean? A) the Floridian Aquifer B) the Vally and Ridge region C) the fall line D) the Marshes of Glynn I got A but I'm not sure if it's right

**AP world**

I can do research for a thesis on whatever AP World topic I want, but I can't find a favorite. Do you guys have any interesting topics you think would be nice to research?

**Reading**

5b 6b

**Chemistry**

If the speed of light is 186,000 miles / sec, how far does light travel in 8.0 minutes?

**college chemistry**

The air in a typical La Crosse basement contains 53 atoms of 222Rn per liter. A. If the basement has 950 ft^2 of floor space and is 8.0 feet tall, how many 222Rn atoms are there in the whole basement? B. Assuming a total pressure of 1.00 atm, what is the partial pressure of ...

**college chemistry**

A 9.60 mL sample of 12.0 M HCl is used to prepare 125 mL of diluted acid. A sample of 32.4 mL of Ba(OH)2 base is exactly neutralized by 24.0 mL of dilute acid. What is the concentration of the Ba(OH)2 base? Help. I don;t know where to start.

**Physics**

In procedure 1: suppose the hanging mass is mH = 203 g and the mass of the cart is mC = 1286 g. a) Assume there is no friction anywhere in the system, and the system starts at rest. i. Find the magnitude of the acceleration of the masses. a = m/s2 ii. Find the magnitude of the...

**English**

What do Transcendentalism and Dark Romanticism have in common? How are they different? I just need help because i'm trying to write an essay.

**Physics**

Suppose the graph of displacement vs. time produced by the ball's motion is: y = 1.56t^2 + 1.04t + 8.11 What is the magnitude of the acceleration of this object?

**Math**

Solve the system of equations using linear combination. a+c=9 8a+4.5c=58

**Chemistry**

Determine what this molecule should really be named. 2,2-ethylpent-3-ene I get the answer 2,2-diethylpent-3-ene. Why would the answer be: 4-ethyl-4-methylhex-2-ene