Friday
July 25, 2014

Posts by liz


Total # Posts: 1,110

science
How do organs and tissues work together to help write your name?

Math with science
thank you so much!!

Math with science
Radioactive iodine treatment is so successful at treating hyperthyroidism that it has virtually replaced thyroid surgery. To the nearest full day, determine how long it will take for 400 millicuries of I-131, which has a half-life of 8 days, to decay to 3.125 millicuries. 56 d...

Algebra
Thanks you were a great help

Algebra
An office building containing 96,000 square feet of space is to be made into apartments. There will be at most 15 one-bedroom units, each with 800 square feet of space. The remaining units, each with 1200 square feet of space, will have two bedrooms. Rent for each one-bedroom ...

Reseach paper
I too am just one of many people on here doing the same paper and so far I havnt been able to find much to help answer the questions and get this paper written. NO I dont want anyone to do my work for me but my goodness a little help would be nice. Good Luck to everyone trying...

writing skills
which one of the following sentences contains an unnecessary word? A.Why dont you leave before the crowd arrives B.The snake raised up its head and struck C.She left early, thoguh he told her not to. D.Rich was angry, but he concealed his feelings

statics
If a court acquits every defendant, they will never commit a Type I error. A) True B) False 2. The probability of rejecting a true null hypothesis increases as the sample size increases. A) True B) False 3. For a given level of significance, the critical value of Student's...

chemistry
so its 2 electrons?

chemistry
How many electrons are transferred in the reaction of hydrogen peroxide with iron (II) ion in acidic solution to form iron (III) ion and water?

Literature poetry, part 1
If this be error and upon me proved, I never writ, nor no man ever loved. These lines are an example of a/an a. quatrain b. octet c. couplet d. sestet

theology
How does the Book of Daniel present a spiritual message? What is the main purpose of this message?

math
From the foot of a building I have to look upwards at an angle of 22 degrees to sight the top of a tree. From the top of the building, 150m above ground level, I have to look down at an angle of 50 degrees below the horizontal to sigh the tree top. a.) How hight is the tree? b...

math
Two observation posts are 12km apart at A and B. From A, a third observation post C is located such that angle CAB is 42 degrees while CBA is 67 degrees. Find the distance of C from both A and B.

math
prove the following trigonometric identity: (cos x/(1+sinx))+tanx = secx

world literature
How do poets utilize literary devices and conventions to develop themes in their poetry? I don't understand how to read a poem so I understand what it is really saying either?

chemistry
Definitely C

simple math
i just wanted to know how many significant figures in the number 100

trig
Determine the height of a tree which casts a shadow of 13.7m when the sun is at an angle of 28 degrees.

math
find the constant term of the expansion of (3x²+(1/x))^8 I don't know where to start =\

math
Find the coefficient of x³ in the expansion of (2x+5)^6

Math
Use Pascal's triangle to expand (a+b)^6 and hence find the binomial expansion of: (x-3)^6

Spelling/Analogy
i think this site sukes i give it no stares in less you are as dum as dirt

math
what is probability

astronomy
yes this is explained much better thank you for your time

astronomy
my book tells me the answer is 49 AU. I am just not getting the calculation. Please help

astronomy
if a comet is 125 years from sun and has a perihelion distance of 1. AU..What is the aphelion distance? I formulated it this way, is this right? 125years^2/1.AU^3= 15,625

science
balance FeS2 + O2 < Fe2O3 + So2

science
how do you balance the equation below? Mg + O2 > MgO

astronomy help please
A planet is growing by accretion of material from the solar nebula. Suppose that as it grows, its density remains constant. Does the force of gravity at its surface increase, decrease, or stay the same? Why? Also, What would happen to the surface gravity as the radius of the p...

thank you
thank you

Astronomy help
If a comet has a perihelion distance of 1.AU and an orbital period of 125 Earth years.. What is the comet's aphelion? Cannot seem to find the correct calculation

Astronomy
Are you saying that as the radius of the planet doubled the surface gravity would double too and it is because of the answer you gave before

can you explain what you are saying
cannot understand your point

Astronomy
A planet is growing by accretion of material from the solar nebula. Suppose that as it grows, its density remains constant. Does the force of gravity at its surface increase, decrease, or stay the same? Why? Also, What would happen to the surface gravity as the radius of the p...

Astronomy
If a comet has a perihelion distance of 1.AU and an orbital period of 125 Earth years.. What is the comet's aphelion? Cannot seem to find the correct calculation

Astronomy
Describe in one sentence the rotations and revolutions of the planets.

Astronomy
How could you tell if a moon or planet did not form with the rest of the solar system bodies? How might it have gotten there then?

Astronomy
Do the rotations of the solar syatem bodies seem to indicate that most of them formed together at the same time in the same way, or seperately under different conditions?

thanks
thanks

Astronomy
In one sentence I need to describe the shapes of the orbits of the planets. The shape must be accounted for in a model of the solar system, and of the solar system formation. My answer would be that the shapes of the orbits are round. Yet this seems to obvious! Need help.. is ...

Math
i feel your hatred. veronica... i feel ya

Astronomy
How did the voyager mission change our preconception of Jupiter and its moons

physical science
are alkali metals or alkaline earth metals soft silver - white, shiny metals

physical science
flourine is a halogen is it also a non-metal

science
Never found in nature uncombined? Alkali metals Alkaline Earth Metals Boron Family Carbon Family Nitrogen Family Oxygen Family Halogen Family Noble Gases

physical science
do not noramlly react with other elements? Alkali metals Alkaline Earth Metals Boron Family Carbon Family Nitrogen Family Oxygen Family Halogen Family Noble Gases

Physical science
Never found in nature uncombined? Alkali metals Alkaline Earth Metals Boron Family Carbon Family Nitrogen Family Oxygen Family Halogen Family Noble Gases

physical science
what is transition metal number 24 a common solid halogen family 13 bears this name

pre-algebra
what is the answer for this equation? -4x+9x

physical science
The exact question how are the following terms related - subatomic particels and atomic mass unit. The heading on the page is review and reinforcement structure of an atom - the three main subtomic particles are the proton, the nuetron and the electron.

physical science
The exact question how are the following terms related - subatomic particels and atomic mass unit. The heading on hte apge is review adn reinforcement structure of an atom - the three main subtomic particles are teh proton, hte nuetron and hte electron.

physical science
what is a one sentence that describes how subtatomic particles and atomic mass unit are realted?

13 colums science
K S S S S S S J S S F S S S S S S S S S D S S R S S S S S S

science
The following is a periodic table below All the letters are in squares The S = an empty square 13 Colums in total Questions: 1. What pair of elements is in the same period? D and R 2. Which pair of elemetns is in hte same family? K and F 3. Which element has the smallest atomi...

science Dr. Bob /Pursley
this is the chart we were given S = empty square 13 columns Question which elemnts are classified as metals. K S S S S S J S S F S S S S S S S S S D S S R S S S S S S

science -purlsey/DrBob
If K is the single one would it still be a metal? see prior question for chart also if the question asks for metals does it mean transitional and metaloids

science
The following is a periodic table below All the letters are in squares The S = an empty square 13 Colums in total Questions: which elements would be classified as metals is it just D & R or other metals which would be J K S S S S S J S S F S S S S S S S S S D S S R S S S S S S

science
How does an electron relate to energy level? How does subatomic particles relate to atomic unit? The reviews ask for 1 to 2 sentences.

science Dr Bob
In reference to table you helped me with the last question is which elements would be classified as metals. Does this include just metals or metals and alltoids and other metals I answered D & R I have a huge test thanks so much.

Physical science
The question which elements would be classified as metals? Would this include: metals - other metals and metaloids. Does metaloids fall under hte category of metals - we are to look at the periodic table and list the metals - not sure if this inclds metaloids and other metals

Phyiscal science test monday
The following is a periodic table below All the letters are in squares The S = an empty square 13 Colums in total Questions: 1. Which pair of eleemtns has hte same number of valence electrons? clueless 2. What pair of elements is in the same period? D and R 3. Which pair of el...

physical science
How is an electron related to an electron cloud

physical science
How is a subatomic particle related to atomic mass unit How is an electron related to enrgy level. Our study guide asks 1 to 2 sentences

physical science
how is an electron related to atomic mass how is an isoptope related to mass number I truly do not understadn how they are realted any help

physical science
how is an electron related to atomic mass how is an isoptope related to mass number

physical science
how is subatomic particles related to atomic mass unit how is an electron related t oenergy level

physical science
How is an isotope and a nuetron related? how is an atomic number and a proton realted?

physical science
What is the substance name for NH3

physical science
is AL ( aluminium) an element compound formula atom molecule

physical science
Most easily observed in the behavior of large objects electromagnetic strong force gravity weak force I answered electromagnetic

physical science
the greatest of the 4 forces would be strong force not electromagnetic force - I am a little confused from the reading

physical science
which one opf the 4 forces opposes the electromagnetic force in the nucleus of an atom: strong force weak force gravity I thought it was stong force

physical science
O = oxygen o2 = ??? it ask for us to name the substance.

physical science
we have a whole list and I am confused and can someone help me with the first 2 as a reference to use. substance O substance O2 **these are both seperate lines** name = under the rest we check appropriate box element compound symbol formula atom molecule

physical science
which one is responsible for holding an atom together strong force weak force electromagnetic gravity I answered both weak force and strong force

physical science
which one opf the 4 forces opposes the electromagnetic force in the nucleus of an atom: strong force weak force gravity I thought it was stong force

physical science
is this correct or incorrect nonmetal are elements that tend to gain electrons in chemical reactions.

phyiscal science
which one opf the 4 forces opposes the electromagnetic force in the nucleus of an atom: strong force weak force gravity I thought it was stong force

phyiscal science
I have to choose one as the greatest of the 4 forces. gravity - weakest weak force - no so it would have to be strong force or electromagnetic force

phyiscal science
can you help me with the first two - I have a chart of 20. Substance O - check any appropriate element - compound - symbol-formula - atom - molecule Substance O2 - check any appropriate element - compund - symbol-formula- atom - molecule

physicalscience
1. which one of the 4 keeps electrons in orbit around the nucleus? electromagnetic force weak force strong force gravity 2. which is the greatest of the 4 fources

physical science
is this correct if not we are to replace the word families elements that have the properties of both metals and non-metals are called families I think it is metaloids?

physical science
a family of elements is the same as a group. is this or should it be a family of elements is teh same as a column

physical science
a family of elements is the same as a group. The word groud needs to be replaced with the correct word????

physical science
is a property of metals luster

physical science
the question ask if charcoal has a luster - and is maleable. I know it is not maleable - but does it have a luster - I am guessing no.

physical science
Thanks got thru all but one Element P has an atomic number of 92 and atomic mass of 238. Element s has 92 protons and 143 neutrons. atomic number and protons are the same would htese two elements be an isotope or different elements

physical science
Can someone explain this to me. Element D has 6 protons and 7 neutrons Element F has 7 protons and 7 nuetrons are the pair isotopes or different elements

Algebra
?I was wondering if you could tell me

math
there are 3 dwrs

math
Low-voltage lighting is a popular feature of landscaping. Two pathways meet at 30 degrees to each other. One pathway has the lighting, and the first light is placed where the two paths meet. The distance between successive lights is 5m, and each has a range of effective illumi...

Algebra
please check my answers. thanxs! Solve the polynomial inequality and graph the solution set on a number line. Express the solution set in interval notation. x^2 - 6x + 5 > 0 -I got (-ininity,1) u (5, infinity) x^2 - 3x - 18 < 0 -I got (-infinity,-3) u (6, infinity) x^2 -...

Inequality
please check my answers. thanxs! Solve the polynomial inequality and graph the solution set on a number line. Express the solution set in interval notation. x^2 - 6x + 5 > 0 -I got (-ininity,1) u (5, infinity) x^2 - 3x - 18 < 0 -I got (-infinity,-3) u (6, infinity) x^2 -...

Chemistry
thank you!

Chemistry
1.What is the formula for finding percent water hydrates? 2. And what is molecular formula?

science
physical or chemical change 1. a water molecule gains enough energy to enter the vapor phase? 2. anti freeze is added to a car radiator to lower the freezing point. 3. a glowing splint placed in a test tube causes it to make a loud "pop"

physical science
can two or more elements be combined chemically to make a new element? Explain. My answer: No, it becomes a compound which is a substance combined of two or more elements chemically combined not sure if correct - I am doing the review and not sure of a few questions thanks

physical science
Does not settle on standing: I answered homogeneous mixture - solution and compound is this correct? Can seperate when allowed to stand alone I answered heterogenous mixture * choices solution, compund, heterogenous mixture and homogeneous mixture

physical science
does not settle on standing? homogeneous mixture, solution and compound is this correct? can seperate when allowed to stand? only heterogenous mixture.

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