Friday
April 18, 2014

Posts by Liz


Total # Posts: 992

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.

physical science
SO CONFUSED???? IS suntan lotion a homogeneous or heterogenous mixture and do heterogenous mixtures often appear clody GRATEFUL

science
is salad dressing - homogenous or heterogenous if it is homogenous is it solution or colloids 8th grade science " just says salad dressing"

science HELP
these are the ones we could not figure out? Are these heterogenous or homogenous ( if homogenous are they solutions or colloids) lemonade brass paint suntan lotion stainless steel

Math
4/5 of 10=

spanish
To circle the indirect object pronouns and draw an arrow to the indirect objects they stand for. Es muy divertido comprar regalos para mi familia y mis amigos. I circled regalos and drew the arrow to mi familia y mis amigos QUESTION: is regalos circled or just the los( in rega...

spanish
To circle the indirect object pronouns and draw an arrow to the indriect objects they stand for. Es muy divertido comprar regalos para mi familia y mis amigos. I circled regalos and drew the arrow to mi familia y mis amigos QUESTION: is regalos circled or just the los( in rega...

SPANISH HELP HELP
To cirle the indirect object pronouns and draw an arrow to the indriect objects they stand for. Es muy divertido comprar regalos para mi familia y mis amigos. I circled regalos and drew the arrow to mi familia y mis amigos QUESTION: is regalos circled or just the los( in regal...

English
CHOICE OF WORDS " perfidy and usurpations" which goes in each BLANK I looked these up in 4 places and I am still confused they seem to have very similar meanings - I think 1 = perfidy and 2 = usurpations 1. We have already seen " circumstances of cruelty and ___...

English
In matching vocabulary for the constitution I can not figure out the last two. CHOICE OF WORDS " perfidy and usurpations" which goes in each BLANK 1. We have already seen " circumstances of cruelty and ___________ scarcely paralleded in the most barbarous ages ....

spanish
hi thanks can you please send me the chart on direct and indirect pronouns

spanish help PLEASE
I answered le le me te * most confused with # 2 b/c it then the sentence read le la 1. El camarero va a traer ____ la cuenta a mi papa 2. A mi hermana Elena _____ encanta el flan 3. a mi ____ gustan las papitas 4. A ti ___ gusta el jamon

SPANISH one more ??
in the following sentence I am to cirle the indirect object pronouns and draw an arrow to the direct object they stand for. A mi me gusta ir de compras. Es muy divertido comprar regalos para mi famililia y mis amigos. MY ANSWSER is this correct. ** cirled me arrow to a mi ** c...

Spanish SO confused
Hi thanks for the help? Which are the correct indirect pronouns for the following: me te le nos les 1. El camarero va a traer ____ la cuenta a mi papa 2. A mi hermana Elena _____ encanta el flan 3. a mi ____ gustan las papitas 4. A ti ___ gusta el jamon

spanish HELP HELP
Indirect verbs me te le nos os los Hi I am trying to see if I did these right? We are asked to fill in the blank with the indirect object pronoun. It seems like each of these is le ( in the blank ) help so confused!!!! 1. Hoy mi madre ____ va a pedir al camarero los camarero l...

Science
How does its mass affect the way an object moves

Chemistry
I NEED HEPL TO BALANCE THIS NH4CL + Na2SO4

math
i have trouble finding the answer to this and how to srt. there is a square and i havbe to find the area. HOweever inside the square is a triangle. the base of the triangle is 3 and the leg is 7. no height is given. plz help. Is this a right triangle? Is the base or leg equal ...

Probablilty
2 questions Roll a fair 6 sided die 3 itmes. What is the probablity that you obtain at least one 5? Use the binomial. A 28 yr old man pays $208 for a 1 year life insurance policy with coverage of $110,000. If the probability that he will live through the year is .9993, what is...

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