Saturday
May 18, 2013

# Homework Help: Science: Outer Space

Recent Homework Questions About Outer Space

Algebra
Jim is installing ceramic tile behind his kitchen sink. Each tile is a square with side length 4 1/4 inches. For each tile, he allows an additional 1/8 inch per side for the grout between tiles. How many tiles should he buy if the space measures 2.1 square feet? What is the ...
Wednesday, October 24, 2007 at 9:05pm

Sciece
How do scientist on earth communicate with a space probe?
Tuesday, October 23, 2007 at 9:44pm

physics
20. does the international space station have gravitational pe? ke? explain? -It has gravitation pe. I thought that Gravitational potential energy is the energy stored in an object as the result of its vertical position or height? 30.a moving hammer hits a nail and drives it ...
Wednesday, October 17, 2007 at 10:16am

physics
please check my answers. 20. does the international space station have gravitational pe? ke? explain? -It has gravitation pe. I thought that Gravitational potential energy is the energy stored in an object as the result of its vertical position or height? 30.a moving hammer ...
Tuesday, October 16, 2007 at 10:04pm

physics problems
please check my answers. 17. explain how the sport of pole vaulting dramatically changed when flexible fiberglass poles replaced still wodden poles? -the fiberglass poles had more momentum and PE than still wooden poles? 20. does the international space station have ...
Tuesday, October 16, 2007 at 7:41pm

SCIENCE
i need a 10 letter word for "all the members of a species that live in the same space
Saturday, October 13, 2007 at 10:41pm

SCIENCE
HOW MANY SATELLITE ARE THERE IN SPACE AND WHAT ARE THEY FOR
Friday, October 12, 2007 at 11:10am

accounting
in the blank space beside each adjustin entry, enter the letter of the explanation A through F that most closely describes the entry. A. to record this periods depreciation expense B. to record accrued salaries expense. C. to record this period's use of a prepaid expense D...
Friday, October 12, 2007 at 7:27am

Physics/Boyles Law
Please confirm/tidy up my fragile understanding as follows: Boyles Law is apparently now known by another name???? If I compressed the air in a room into a cylinder obviously everything that was in the room is now in the cylinder including the heat. As the heat out of a large ...
Friday, October 12, 2007 at 1:47am

Physics
The drawing shows two surfaces that have the same area. A uniform magnetic field B fills the space occupied by these surfaces and is oriented parallel to the yz plane as shown. If = 17°, find the ratio xz/ xy of the magnetic fluxes that pass through the surfaces.
Thursday, October 11, 2007 at 6:11pm

accounting
in the blank space beside each adjustin entry, enter the letter of the explanation A through F that most closely describes the entry. A. to record this periods depreciation expense B. to record accrued salaries expense. C. to record this period's use of a prepaid expense D...
Thursday, October 11, 2007 at 1:51pm

Physics
A space station is shaped like a ring and rotates to simulate gravity. If the radius of the space station is 140 m, at what frequency must it rotate so that it simulates Earth's gravity?
Tuesday, October 9, 2007 at 12:02am

economics
I tried answering b, but stuck with a. Can someone please take a look at this and help me out? Also check, if answer to b is correct? 1)Bob and Jane decide to open their own business selling ergonomically correct office furniture that Jane has designed. They have so much faith...
Friday, October 5, 2007 at 1:20pm

Economics
Hi, Could you please help me with the following question? Bob and Jane decide to open their own business selling ergonomically correct office furniture that Jane has designed. Assume they operate this business from leased office space near their home. Also assume that they ...
Thursday, October 4, 2007 at 10:03am

As an eight-year-old-girl, it was my first time on an airplane, traveling from my home in India to the United States with my mom and brother. I sat on the airplane for seventeen hours and felt restless just sitting in my seat. I was wrapped in my blanket and was watching a ...
Wednesday, October 3, 2007 at 11:04pm

MATH
THE STUDENTS FROM JEFFERSON SCHOOL TURNED A VACANT LOT INTO A VEGETABLE GARDEN. TOMATOES WERE PLANTED IN 4/5 OF THE GARDEN SPACE. CHERRY TOMATOES TOOK UP 1/6 OF THAT SPACE. WHAT PART OF THE GARDEN WAS PLANTED IN CHERRY TOMATOES?
Wednesday, October 3, 2007 at 8:52pm

Life in America is completely different compared to life in India. As my father drove us to our new house after he picked us from the airport, all I saw was open space and emptiness. I lived in a town in India where there were always people walking and cars honking on the road...
Tuesday, October 2, 2007 at 6:34pm

economics
a job can be advertised as a a)free space b)work gap c)empty posting d)vacant position
Tuesday, October 2, 2007 at 5:36pm

Algebra
A homeowner wishes to insulate her attic with fiberglass insulation to conserve energy. The insulation comes in 40-cm wide rolls that are cut to fit between the rafters in the attic. If the roof is 6 m from peak to eave and the attic space is 2 m high at the peak, how long ...
Monday, October 1, 2007 at 12:34pm

Physics
In a lightning bolt, 16 C of charge flows in a time of 1.5 10-3 s. Assuming that the lightning bolt can be represented as a long, straight line of current, what is the magnitude of the magnetic field at a distance of 24 m from the bolt? please tell me where I am going wrong. B...
Friday, September 28, 2007 at 2:43am

Physics
A piece of copper wire has a resistance per unit length of 5.95 10-3 /m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.200 m. The ends of the wire are connected to a 12.0 V battery. Find the magnetic field strength at the center of the coil. In ...
Thursday, September 27, 2007 at 11:06pm

science
I can travel where there are no molecules, but never through a brick. I can travel through space, but never around a corner. What am I?
Wednesday, September 26, 2007 at 10:01pm

math
Mr. Balk and Mr. Sullivan have created their own cookie factory. In their factory, they bake two and only two types of cookies: the Balkster and the Sullivander. The Balkster cookie requires 1 pound of cookie dough per dozen while the Sullivander requires 0.7 pounds of cookie ...
Monday, September 24, 2007 at 12:21am

French for Mischa
The first question I used to ask my students was "Why are you studying French?" They didn't always have the "best" reason but those that had a good reason, started with a great attitude and did well. In case they didn't have a good reason, I had a ...
Saturday, September 22, 2007 at 4:44pm

Physics
A space probe has two engines. Each generates the same amount of force when fired, and the directions of these forces can be independently adjusted. When the engines are fired simultaneously and each applies its force in the same direction, the probe, starting from rest, takes...
Monday, September 17, 2007 at 11:52pm

science
Systems in space are called blank science?
Monday, September 17, 2007 at 7:30pm

math
The Rossi family wants to install new tiles on the floor on their kitchen. The tiles they plan to use are 3 in x 3 in squares. The floor space to be covered is shown in the diagram below with measurements given in feet. How many square tiles will the Rossi family need to cover...
Monday, September 10, 2007 at 3:57pm

Music
I need to know about Columbia in America. Like the D.C.'s and how the space shuttle Columbia got her name.
Sunday, September 9, 2007 at 3:05pm

Physics
Suppose that an object travels from one point in space to another. Make a comparison between the displacement and the distance traveled. a) the displacement is either greater than or equal to the distance traveled b)the displacement is always equal to the distance traveled. c)...
Sunday, September 9, 2007 at 1:34pm

Language/Listening Skills
Would (D) be the best answer for this question? Listening activities should be: A. on the floor,in a corner of the room. B. in a large area for children to have space and feel comfortable. C. required of all students D. in a small area with the least number of distractions.
Friday, September 7, 2007 at 3:06pm

science
Suppose that an object travels from one point in space to another. Make a comparison between the displacement and the distance traveled. a) the displacement is either greater than or equal to the distance traveled b)the displacement is always equal to the distance traveled. c)...
Thursday, September 6, 2007 at 5:12pm

Math (Sorry, Forgot to add Part B)
The Pleasant Valley Library is moving to a larger building. To get ready for the move, the staff is packing all of the books into boxes. The library owns 35,000 books. On average, each book measures 8 inches by 10 inches by 2 inches. Each box measures 2 feet by 2.5 feet by 1.5...
Wednesday, September 5, 2007 at 7:05pm

physics
The Space Shuttle astronauts use a massing chair to measure their mass. The chair is attached to a spring and is free to oscillate back and forth. The frequency of the oscillation is measured and that is used to calculate the total mass m attached to the spring. If the spring ...
Wednesday, September 5, 2007 at 4:17pm

French = one more!
IMPARFAIT/PASSE COMPOSE The non-native speaker is often confused about when to use the imperfect (imparfait) and present perfect (passé composé). The imperfect is most often used to indicate continuity, habit and repetition, in the past; keywords which help to ...
Wednesday, September 5, 2007 at 11:08am

French #2
IMPARFAIT/PASSE COMPOSE The non-native speaker is often confused about when to use the imperfect (imparfait) and present perfect (passé composé). The imperfect is most often used to indicate continuity, habit and repetition, in the past; keywords which help to ...
Wednesday, September 5, 2007 at 11:04am

Art
I choose a painting to write about and I am having the hardest time trying to see the form, color, space and much more. Is there anyone that knows this kind of stuff?
Tuesday, September 4, 2007 at 3:26pm

sci
Suppose you are in charge of planning a forest reserve, and one of your main goals is to help sustain locally beleaguered populations of woodland birds. Parasitism by the brown-headed cowbird is an escalating problem in the area. Reading research reports, you note that female ...
Wednesday, August 22, 2007 at 11:54pm

BIOLOGY
Suppose you are in charge of planning a forest reserve, and one of your main goals is to help sustain locally beleaguered populations of woodland birds. Parasitism by the brown-headed cowbird is an escalating problem in the area. Reading research reports, you note that female ...
Wednesday, August 22, 2007 at 6:45pm

Earth and Space Science
Hi everyone! I am having the darndest time figuring out the answer to a test question and am wondering if anyone can shed some light and help me out. Here is the question: The temperature (the average kinetic energy of the molecules) of a star is evidenced by its color (its ...
Saturday, August 18, 2007 at 6:24am

math
This is about problem solving patterns in 4th grade. The question asks What are the fewest nunber of buttons you need to make six rows in this pattern?Then to the right of the picture there is 6 buttons in one row and 5 buttons in the second row and 4 buttons in the third row...
Thursday, August 16, 2007 at 10:54pm

Dr.Bob (Tooth bleaching etc.)
From what was commented on my report on tooth bleaching hazards, I was curious to know what exactly everyone thought about it. I really thought from the comments I read besides those from drwls, that ideas were inconclusive as to whether it was a good report or not. As I'...
Monday, August 13, 2007 at 8:20pm

English
Are these complex sentences???? =/ help. 1. Although my friend did not believe, I am a devout Christian. 2. If i remain diligent, I will succeed. 3.Unless he gets the defiant behavior under control, he will be expelled. 4.Because I hate spending my money, shopping makes me ...
Sunday, August 12, 2007 at 11:33am

physics
The distance from earth to the center of the galaxy is about 22500 ly (1 ly = 1 light-year = 9.47 1015 m), as measured by an earth-based observer. A spaceship is to make this journey at a speed of 0.9995c. According to a clock on board the spaceship, how long will it take to ...
Friday, August 10, 2007 at 5:08pm

Communication Technology
A digital fsk equipment transmits bipolar return to zero data. when sending a sequence of alternating ones and zeros how many different frequenies will be transmitted? The fsk is actually sending mark and space signals, isn't it? The actual frequncies depnends on the ...
Thursday, August 9, 2007 at 7:49pm

algebra 2(check)
1)Choose the correct description of the system of equations:2x+3y=10 and 4x+6y=20. I got consistent/dependent 2)The first equation of the system is multiplied by 2. By what number would you multiply the second equation to eliminate the x variable by adding? 6x-5y=21 4x+7y=15 I...
Friday, July 27, 2007 at 9:57pm

math
How do you solve system of equations and tell if they're consistant and independant,consistant and dependent,and inconsistant? If you find no solutions then the system is inconsistent. Suppose you have N variables and M equations (N larger than or equal to M). Then, if you...
Friday, July 27, 2007 at 1:31pm

Hi. Can you fix any errors in my essay. Thanks Last week, I went to public court to learn and have a new experience. I was surprised the name of the street was courthouse circle where the court was. There were many police cars parked on the street. It was a tall building. ...
Monday, July 23, 2007 at 5:56pm

Anatomy and Physiology
Why is the epidural space absent in the brain? Since this is not my area of expertise, I searched Google under the key words "brain 'epidural space'" to get these possible sources: http://depts.washington.edu/anesth/regio​nal/epiduralspacetext.html http...
Friday, July 20, 2007 at 8:09pm

English
Are these sentences correct: The littel boy handed Santa a list that said he wanted: a truck, a train, and a million dollars. Her mind flew so quickly-she had so much to remember-that she forgot to stop at the light First sentence: ~~correct the spelling of "little"...
Friday, July 20, 2007 at 6:20pm

MATH
I'M HAVING A PROBLEM WITH THIS PROBLEM,IT SAY'S FIND THE MISSING NUMBER HERE IS AN EXAMPLE PROBLEM, _ + 7 + -7 = -8 ,I NEED HELP WITH THAT . First: + 7 + -7 = 0 ___ + 0 = -8 Do you see what the answer is now? WHAT MISSING NUMBER GO IN THAT SPACE,I DON'T UNDERSTAND ...
Monday, July 16, 2007 at 1:45pm

science(chem&statistics)
I have to write a abstract for my paper I was wondering if it was better to write it at the beginning or the end of the lab report. If I was to eliminate 1 value as an outlier would I go and include that in calculations of the RSD? I would assume not since It would affect the ...
Thursday, July 12, 2007 at 8:57pm

linear algebra
Show that a subset W of a vector space V is a subspace of V if and only if the following condition holds: If u and v are any vectors in W and a and b are any scalars, then au + bv is in W.
Wednesday, July 11, 2007 at 10:03pm

linear algebra
If A is a nonsingular matrix, what is the null space of A? If A is nonsingular then the equation: A x = y has a unique solution. Now, the equation: A x = 0 always has a solution: x = 0. If A is nonsingular, then this must thus be the only solution. This means that the null ...
Wednesday, July 11, 2007 at 9:08pm

Finance Management
How do I solve this problem using net present value and internal rate of return methods? Julie Kowalis, an investment analyst, wants to know if her investments during the past four years have earned at least a 12% return. Four years ago, she had the following investments:She ...
Tuesday, July 10, 2007 at 2:33pm

physics
what is physics?i know that its subject but what is defination of physics? The study of matter, energy, space, and time, and the interactions thereof.
Saturday, July 7, 2007 at 8:42am

Math-precalc
Is it possible to find a rational function that has x-intercepts (-2,0) and (2,0), but has vertical asymptote x=1 and horizontal asymptote of y=0? The horizontal asymptote and the x-intercepts parts stump me. If you can't reach y=0, then how can you get the x-intercepts? ...
Saturday, July 7, 2007 at 12:08am

algebra
A homeowner wishes to insulate her attic with fiberglass insulation to conserve energy. The insulation comes in 40-cm wide rolls that are cut to fit between the rafters in the attic. If the roof is 6 m from peak to eave and the attic space is 2 m high at the peak, how long ...
Wednesday, July 4, 2007 at 4:24pm

science (chem)
Does EDTA react with light? I forgot to cover a dilute bottle of EDTA (about 0.01M) and was wondering if that would have any affect on the solution I don't think so. I have used EDTA many times and never covered it or used a tinted container. okay =) i posted an answer to ...
Monday, July 2, 2007 at 7:13pm

Math, Help
I am lost with these two problems... Problem #1 Write a sample space for the given experiment A box contains 3 blue cards numbered through 3, 4green cards numbered through 4. A blue card is picked , followed by a green card. Problem #2 Write the indicated even in set notation ...
Friday, June 29, 2007 at 11:27am

reasons why people read... People read because they: want information need information want to be entertained want to escape can't help themselves and automatically read everything in sight love the written word enjoy literature In application of and in addition to please ...
Wednesday, June 27, 2007 at 9:26pm

music
Who invented the trumpet and when? Stoelzel reported his invention in the following letter, dated December 6, 1814, which was sent to Friedrich Wilhelm III, King of Prussia: Most illustrious, most mighty King Most gracious Lord and Majesty! The horn, to which I have chiefly ...
Sunday, June 24, 2007 at 10:22am

Algebra
I have to explain how I might apply rational expression to my everyday life. I have to explain the application and discuss what the equation might be. Is this a good example? You go shopping for a big flat-screen HDTV. They always measure TVs diagonally, and HDTV screens have ...
Friday, June 22, 2007 at 2:04am

Geography. plz help its urgent.
Ok, so i was given an essay question to do. In a well developed essay, list and explain the three types of immigrants that Canada accepts. Explain why the Canadian Government would want to allow such immigrants to enter into Canada. Pleasee help. I know already the three types...
Wednesday, June 20, 2007 at 8:32pm

Science
I have a science exam tomorrow for 9 Space Science. I was wondering if you could help me find free practice exams, tests or questions to review for my exam. We have no way of knowing what your exam will cover. Your best bet is to review your own text, notes, and handouts.
Wednesday, June 20, 2007 at 6:40pm

Two parallel wires are carrying 5A and are separated by 2.0 m. if the currents are in opposite directions, what is the magnitude of the magnetic field halfway between them? Someone please help as I can't figure out the question. Thanks, They are asking for the field ...
Wednesday, June 20, 2007 at 12:58pm

Algebra
How would you prove this theorem: The column space of an m x n matrix A is a subspace of R^m by using this definition: A subspace of a vector space V is a subset H of V that has three properties: a) the zero vector of V is in H. b) H is closed under vector addition. c) H is ...
Tuesday, June 19, 2007 at 1:26am

Physics- sound
As the drawing shows, the length of a guitar string is 0.628 m. The frets are numbered for convenience. A performer can play a musical scale on a single string, because the spacing between the frets is designed according to the following rule: When the string is pushed against...
Monday, June 18, 2007 at 8:52pm

social studies
wat the hell is rampurva bull capital.......? please plz plz plz plz plz plz..... temme.... Bull Capital Rampurva Maurya 323 - 185 BCE The 8’9" Rampurva Bull capital comes from one of a pair of pillars found at the same site on the Gandak river, about half way from ...
Monday, June 18, 2007 at 2:50am

sociolinguistics-one more question
i forgot to ask one more thing..what is a regional dialect?i can't find anything about that A regional dialect is the use of certain words and accents peculiar to a given region. Y'all, for instance, marks a southern U.S. speaker. The pronunciation of some words such ...
Sunday, June 17, 2007 at 4:52pm

Intro. to Computers
Can you help with these 2 questions? 1. The law firm you work at regularly scans documents into the computer system. They now want to be able to edit the digital image copies of those documents. Which do they need to accomplish this? (A) Optical character recognition software ...
Wednesday, June 13, 2007 at 6:31pm

Intro. to Comp.
I tried them on Google -- and # 3 got me lots of sites with poodles. See how I found dog sites without any references to poodles. http://www.google.com/search?source=ig&h​l=en&q=dogs+-poodles Can you help with this question? You want to do a search on the internet for ...
Tuesday, June 12, 2007 at 1:38pm

Can you check if my french is right? Each part of France has its own type of cuisine. The French cuisine varies by season. In the summer season, salads and fruit dishes are popular and the winter and autumn seasons are the hunting seasons, foods of all kinds are eaten. There ...
Sunday, June 10, 2007 at 9:33pm

Spanish Help, Por Favor!
Please help me correct the following paragraph for grammar, spelling, and word usage. Thanks! El testigo del Jehová estaba parado en el borde de la tabla y gritó para sus pantalones. Desafortunadamente, los tres enanos habían funcionado ya lejos, llevando ...
Thursday, June 7, 2007 at 11:18pm

math,algebra II
I have to work with these types of problems dealing with matrises can someone show me how to solve them.Heres one of them: Directions: Find the values of the variables in each equation in the first matrix it looks like this a+2 3z+1 5m 4k 0 3 then theres a plus sign and the ...
Wednesday, June 6, 2007 at 4:22pm

Science
Why has it taken astronomers so long to discover the planet QUAOAR? Space is huge. The object is dim. Under high magnification, even a small amount of space takes a very long time to scan. Plus the object is moving so it's in a different place. That's one way such ...
Monday, June 4, 2007 at 9:44pm

French
can someone please prrof read this for me please?and correct me if i have made any mistakes?thanks. J'habite a Morley,c'est un banlieue pres de centre ville. J'habite dans une maison au premier etage.c'est grand et anciens (ca date de 1850).au rez-de-chaussee, ...
Monday, June 4, 2007 at 1:31am

Plz!!! HELP MEE!!! Are there any similarities between elements and compunds? Are there any similarities between elements and mixtures? <G>Yes they are both made of matter and hence occupy space. They occur in 3 states Solid, liquid, Gas.<G> please read: http://www....
Sunday, June 3, 2007 at 10:28pm

French
Please check this over. Thank you. Dans les histoires, la poignée de main et Nathalie et le Bonheur, les caractères principaux se battent rendre leurs parents satisfaits en essayant d'accomplir des buts de les rendre heureux. Sans tenir compte de toutes les ...
Sunday, June 3, 2007 at 1:11pm

French
Nathalie a cru qu'elle n'était pas responsable du bonheur de ses parents. Son père et mère se sont disputés pour les raisons qui un ont appelé d'enfant. Pourtant, Nathalie savait qu'ils n'argumentent pas en faveur des ...
Saturday, June 2, 2007 at 8:06pm

French
I translated a summary of a story from English to French. Please correct the french. Some of the english I wrote was not perfect, but only because it would be easier for me to translate it into French. Martin Dubois a vécu dans une ville extrayante de l'Abitibi. ...
Saturday, June 2, 2007 at 3:50pm

physics
A) What is the minimum speed, relative to the Sun, necessary for a spacecraft to escape the solar system if it starts at the Earth's orbit? B) Voyager I achieved a maximum speed of 125 000 km/h on its way to photograph Jupiter. Beyond what distance from the Sun is this ...
Wednesday, May 30, 2007 at 11:52pm

Science
Why are salts, such as sodium chloride made of elements found on opposite ends of the periodic table? a. elements on the far left tend to form positive ions while those on the right tend to form negative ions. b. elements on opposite ends of the periodic table have similar ...
Tuesday, May 29, 2007 at 3:47pm

English
Punctuating Sentences The goose bit the mailman on the leg. Your answer: 1. no change good ~~~~~~~~~~~~~~~~~~~ Punctuating Sentences With five gallons of gas. Your answer: 2.With five gallons of gas, the car will not run for long. good ~~~~~~~~~~~~~~~~~~~~ Punctuating ...
Tuesday, May 29, 2007 at 12:41pm

French
Hey, could someone please proof read my homework? I have already checked over it but I think that there's still mistakes in it. Thanks alot. De l’autre côté, on faux de ne fume pas pour être en forme. Fumer n’est bonne pas pour ton santé...
Thursday, May 24, 2007 at 3:17pm

French
Hey, could someone check my short piece of French homework for mistakes? Have you got any ideas what I could add into it to make it a better text? Thank you, here it is: Pour être en forme, il est important de faire de l’exercise souvent et manger sain. Je ne faire ...
Wednesday, May 23, 2007 at 4:23pm

More Algebra 2
It would be great if, again, someone would check these answers for accuracy. I'd like to know if I'm doing them right. 1) What equation defines an exponential decay function? a) y=x^pi b) y=pi^-x c) y=(1/pi)^-x d) y=pi times x I think the answer is c. 2) Suppose a lake...
Wednesday, May 23, 2007 at 4:19pm

english
I'm suppose to figure out what the leg is a metaphor for in the following story. I can't figure it out. Any suggestions?! Letter from Gaza by Ghassan Kanafani Dear Mustafa, I have now received your letter, in which you tell me that you've done everything necessary ...
Tuesday, May 22, 2007 at 9:57pm

French
I hope you very kind people out there will correct my French essay! Some places I have problems with past tense, so there I could use some help. Here's my essay: Chère mère et père, Comment Va va? Ici il va bien! Hier nous arrivér dans la ...
Monday, May 21, 2007 at 10:01am

Physics
Any help pleeeze!! I'm totally lost on these!! 1. A 14 g coin slides upward on a surface that is inclined at an angle of 16° above the horizontal. The coefficient of kinetic friction between the coin and the surface is 0.23; the coefficient of static friction is 0.31. ...
Sunday, May 20, 2007 at 11:03am

Art
what are the form and content in Michaelangelos Creation of man? How do you pick out line, balance, shape, color, contrast, texture, space, and proportion to size in this painting. Posted for Guru Blue These sites will give you some information on that painting: http://en....
Friday, May 18, 2007 at 4:47pm

Lin. Alegra Help
Suppose that you are given the following system of linear equations [variables are x1, x2, x3 and x4] x1 + 3x2 + 9x3 + 2x4 =5 x1 + 3x3 - 4x4 =5 x2 + 2x3 + 3x4 =-1 -2x1 + 3x2 + 5x4 =-1 Let b be the vector such that B = [A b] , and let a1, a2, a3 and a4 be the columns of A. a) ...
Wednesday, May 16, 2007 at 8:55pm

Science
Can sound exist in a vacuum? No Yes...my hoover is loud when I turn it on! Ignore Eddie's remark. His Hoover is not in a vacuum. It only creates a partial volume inside itself. Since sound is produced by the movement of molecules, and there are no molecules in outer space...
Wednesday, May 16, 2007 at 7:04pm

science
What is on pulsars and pulsar planets. Using this information, describe what you might encounter on your space mission. Thank you for using the Jiskha Homework Help forum. Rather than my posting an entire page of sites, please go to the following, which I found with a Google ...
Tuesday, May 15, 2007 at 4:26pm

Astronomy
Imagine that you are on a mission to explore a pulsar type star. What will you find there on pulsars and pulsar planets. Using this information, describe what you might encounter on your space mission. Thank you for using the Jiskha Homework Help forum. Rather than my posting ...
Tuesday, May 15, 2007 at 2:59pm

Astronomy
Imagine that you are on a mission to explore a pulsar type star. What will you find there on pulsars and pulsar planets. Using this information, describe what you might encounter on your space mission. Be sure to include references of your sources. Be careful to avoid using ...
Tuesday, May 15, 2007 at 1:25pm

reaearch paper
How can I narrow down all my research to 3 pages? Smaller font, no run on sentences, no useless info if you have to dubble space dont (hearts) Edit out all of the parts that don't directly pertain to your thesis statement.
Monday, May 14, 2007 at 5:52pm

HELP
i keep getting this error when I type my assignment in, You are not allowed to post internet addresses. If you own a website and would like Jiskha to link to it, please contact us. but there is no internet address. AH! Look for a www in your text. there isn't three w's...
Thursday, May 10, 2007 at 7:50pm

physics (for bobpursley, or anyone)
Hey bob, its Mike and Jake. We wanted to start over on a new foot with you. We got assignment worth over 300pts, so far we getting 80% of the questions right, which is pretty good. We are stuck on some questions. We will tell you the questions and tell you what we think and ...
Thursday, May 10, 2007 at 6:40pm

Math
What is a "sample space" when you are listing outcomes? Pls respond! http://www.google.com/search?as_q=&hl=en​&num=10&btnG=Google+Search&as_epq=sample​+space&as_oq=&as_eq=&lr=&as_ft=i&as_file​type=&as_qdr=all&as_nlo=&as_nhi=&as_occt​=title&...
Tuesday, May 8, 2007 at 4:55pm

science
Couple of questions. Why does the earth keep moving? The engine of a rocket applies a continual force to push the rocket along. When the engine stops what will happen? I think the rocket will stop acceleration You need to be aware of the concept of inertia. Inertia is the ...
Tuesday, May 8, 2007 at 3:03pm

physics
when a power station converts chemical or nuclear energy to electrical energy it converts about 50% of the energy to low grade heat suggest how people could use this energy before the power station operators allow it to enter the environment. why is this low grade heat energy ...
Tuesday, May 8, 2007 at 7:00am

French
Can someone edit this? Mon rêve a commencé dans un ascenseur. J'allais au cinq millième cinq cent et cinquante cinquième plancher. Pendant que j'étais dans l'ascenseur j'ai rencontré un petit garçon. Il é...
Monday, May 7, 2007 at 8:51pm

Microbiology
How would someone identify an unknown bacteria? "Due to the prospect of interplanetary travel, how would you attempt to isolate and identify a bacterial infection acquired on another planet. This bacteria is unknown to use and does not appear in Bergey's or the manual...
Saturday, May 5, 2007 at 6:51pm

algebra
A homeowner wishes to insulate her attic with fiberglass insulation to conserve energy. The insulation comes in 40-cm wide rolls that are cut to fit between the rafters in the attic.if the roof is 7 m from peak to eave and the attic space is 3 m high at the peak, how long does...
Friday, May 4, 2007 at 2:57pm

physics
why does an heater with a fan is more efficient than a similar heater that doesn't have a fan? It distributes the heat throughout the space (room) that is being heated.
Friday, May 4, 2007 at 9:21am

physics-heat transfer
consider a brick wall that has been exposed to the sun for some time. 1.how did the heat get from the sun's surface to the wall?(is it something about radiation?please help.) 2.the air over the wall seems to shimmer and shake as air currents rise from it.explain what ...
Friday, May 4, 2007 at 7:19am

Homeowork
I basically just have trouble staying focused and doing my homework, and often get discouraged when it looks long- how can I keep myself on track, because hw is my biggest issue? Go here , with your mom. http://www.pinkmonkey.com/electricdesk/e​lec-desk.asp Go thru the ...
Tuesday, May 1, 2007 at 9:16pm

stastics
a car dealer estimates that they sell two cars on average per week. they only have space in their showroom for 4 cars. if stock replacement cannot take place within a week, what is the probability assuming that weekly car sales follow a poisson distribution that, the dealer ...
Friday, April 27, 2007 at 3:51am

Spanish
I would like to know if my answers to the following questions are correct: ¿Qué es lo importante para tí en un trabajo? Opino que un trabajo debe ser interesante. Me gustaría un trabajo que es un desafío y pienso que es bueno si paga bien, ...
Thursday, April 26, 2007 at 1:38pm

Science
Does air have mass? I think it does because air takes up space so it is matter and matter has mass. right you are. To weigh it is a bit tricky. One way is to compress it.
Wednesday, April 25, 2007 at 11:13pm

essay help
Jon, this is exactly the site you need to check... http://owl.english.purdue.edu/owl/resour​ce/557/03/ I dont have to have a works cited page and all of that good stuff. I dont have that many pages to work with my instruction is just to cite the sources so what I did was...
Wednesday, April 25, 2007 at 2:58pm

position paper+can someone edit it for me thanks!
thanks Writeacher What is a senate? A senate is the upper house of the legislature. It is also know as the red chamber. The senate’s job is to undertake in-depth inquiries into issues. Many people argue against and for the senate this is an important issue because this ...
Monday, April 23, 2007 at 11:47am

chem - dry ice activity
does the dry ice disappear more quickly in air or in water? can you explain why? supplement your explanation with a drawing of molecular behavior based on kinetic molecular theory What do you think and why? We shall be happy to critique your thoughts. The dry ice disappears ...
Sunday, April 22, 2007 at 9:46pm

math!!!
can you please check my work 19mm=? m ?=.19??? .017km=? cm ?=1700? 61500cm/min =? km/h ?=.615? thank youuu! .019 (missed a decimal space) 1700 is correct The last one is a little trickier. First, figure out how many km per minute you are moving: .615 km/minute Since that is ...
Saturday, April 21, 2007 at 4:55pm

French for Pauline
Some of this may be repetitive, but "repetition" is the "key" to success! These all came from separate sheets, just put together. So you want to learn another language? The first thing to do is analyze what type of learner you are. If you learn best by ...
Friday, April 20, 2007 at 10:51am

chem
Sorry about that. I don't know why it did that? I will try to recap the two or three sentences I read. The oxygen molecules dissolve in H2O in the spaces between the molecules of H2O. Liquid water consists of a network of hydrogen bonded water molecules. The oxygen, in a ...
Thursday, April 19, 2007 at 10:28pm

My Retyped Algebra Post
1. Use the arithmetic sequence of numbers 2,4,6,8,10.. to find the following: a)What is d, the difference between any consecutive terms? Answer: Show work in this space: b)Using the formula for the nth term of an arithmetic sequence, what is 101st term? Answer: Show work in ...
Thursday, April 19, 2007 at 5:02am

math
Can someone explain this to me. Determine if the given rule is a function, and if not, explain why. a. People assigned to their fathers b. Numbers assigned to the sums fo their digits. c. Mothers assigned to their children. a) Here the rule defines a function from the set of ...
Wednesday, April 18, 2007 at 8:40pm

science science science science science science
The moon orbits around the earth.Which of the following keeps the moon traveling in the same path each time it orbits the earth? A.energ from the surroundings B.Pull of gravity between the moon and the earth C.orbits in space are pushing the moon towards the earth D.the winds ...
Wednesday, April 18, 2007 at 5:31pm

science
the planets of the solar system revolves around the sun in orbits because the the Suns__________. A.The suns gravity B.The suns rotation C.the suns heat energy D.The suns magnetic feild Maybe C. & d. is wrong i think What keeps anything from flying off into space? the gravity...
Wednesday, April 18, 2007 at 4:53pm

Science
A student goes fishing in the bay.He catches a few fish and dicides to put them with other fish in a small fishpond behind his house.The next day he notices that all the new fish have died. Which is the MOST LIKELY reason the fish died? A.They did not have enough space B.They ...
Wednesday, April 18, 2007 at 4:19pm

physics
A 92kg astronaut and a 1.2E3kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving a speed of 0.14m/s directly away from the shuttle. Seven and a half seconds later the astronaut comes into contact with the shuttle. What was the ...
Tuesday, April 17, 2007 at 2:03am

French
Is this paragraph correct? Would someone mind editing it for me? La derniere semaine, une partengue a piqué Steve Irwin quand il a nagé à la nord de l'Australie. Steve Irwin est mort de la poison. Il n'y a pas d'un accident. La partengue a &...
Sunday, April 15, 2007 at 2:42pm

Poetry
I am supposed to give a literal explanation of this poem, but I am really confused by it. Your help will be much appreciated. Snow & Ice by Quincy Troupe ice sheets sweep this slick mirrored dark place space as keys that turn in tight, trigger pain of situations where we move ...
Friday, April 13, 2007 at 2:36pm

Admissio Appeal Letter, the most updated one
Plz give some helps for my appeal letter. Thanks Dear Undergraduate Admission Office, I recently received a letter from Purdue University informing me that I have been offered an admission to The College of Engineering for Summer 2007 at Purdue University Park campus because ...
Friday, April 13, 2007 at 3:27am

French
Can someone check this french recipe? Thanks! Pâte : 2 cuillère de miettes de biscuit sec de Graham 16 once de fromage blanc de Crème-Style 16 once de fromage de Crème amolli 1 1/2 tasse de Sucre 4 Oeufs ; légèrement battu 16 once de cr...
Thursday, April 12, 2007 at 9:10pm

english
I am supposed to give a literal explanation of this poem, but I am really confused by it. Your help will be much appreciated. Snow & Ice by Quincy Troupe ice sheets sweep this slick mirrored dark place space as keys that turn in tight, trigger pain of situations where we move ...
Thursday, April 12, 2007 at 7:42pm

Poetry
I am supposed to give a literal explanation of this poem, but I am really confused by it. Your help will be much appreciated. Snow & Ice by Quincy Troupe ice sheets sweep this slick mirrored dark place space as keys that turn in tight, trigger pain of situations where we move ...
Thursday, April 12, 2007 at 5:42pm

journalism
you're laying out an inside page in a 5-column format. the ads stack up pretty high; your available space for news is 6 inches deep and the full page (5 columns) across. you need to dummy two stories: one 15 inches long, the other 10 inches. neither has art. you can trim ...
Wednesday, April 11, 2007 at 9:33pm

Astronomy
A cinder block can be weightless in space. Would you want to kick it with your bare foot? Even If it is weightless, does it have mass? An astronaut, circling the earth in the Space Shuttle, senses that his apparent weight is zero. He cannot feel the normal earthbound sensation...
Tuesday, April 10, 2007 at 3:56pm

CHEMISTRY
How many moles of NAOCl are there in 3mL of bleach solution. The density of the solution is 1.005g bleach soln/mL and it is 5.25% by mass (5.25 NAOCl/100g soln. Can someone tell me if I have this set up correctly? 3mL * 1.005g/1ml * 5.25g/100g* 1mol NAOCl/74.44g NAOCl Thank ...
Tuesday, April 10, 2007 at 8:36am

physics
An astronaut is in space at the midpoint between two stars of equal mass. Everything else is infinetly far away. What is the weight of the astronaut? Explain your answer. The attraction to each of the stars is equal, but opposite direction. Weight is the net force of attraction.
Monday, April 9, 2007 at 11:04am

physics
Zero, a hypothetical planet, has a mass of 3.0*10^23 kg, a radius of 3.0*10^6 m, and no atmosphere. A 10 kg space probe is to be launched vertically from its surface. (a) If the probe is launched with an initial kinetic energy of 5.0*10^7 J, what will be its kinetic energy ...
Sunday, April 8, 2007 at 7:34pm

MATH!
Finding Common Demoninators in fractions. 1) 2 4 -- - --- x^2-16 x^2+x-12 2) x-3 x+3 ---- + ------ x^2+2x-8 x^2+7x+12 Can ANYONE help me with these. I cant figure out how to get the DEMONINATORS THE SAME!? Use brackets to write these kind of fractions, the text editor of this ...
Sunday, April 1, 2007 at 5:37pm

Physical Science
Harry takes a space voyage and returns to find his twin sister has aged more than he has. This is evidence that they have been in a different....? health plan :-) spcae times
Thursday, March 29, 2007 at 9:49pm

French
Someone please correct this. Ma soeur et je toujours ai se ressemblent comme deux gouttes d'eau. Tout le monde nous avons rencontré avons pensé nous étions des jumeaux. Elle est une année plus vieille que me. Nous avions des cheveux sombres et ...
Wednesday, March 28, 2007 at 10:01pm

Foreign Languages
Proofread Please!!! ¡El acontecimiento que ha ocurrido hoy eso ha dado lugar a este día que era extraordinario ha sido que he conseguido presentes porque es mi cumpleaños hoy! Hoy en la universidad de Carolina del Norte en la colina de la capilla mis amigos...
Wednesday, March 28, 2007 at 8:51pm

Foreign Languages
Proofread Please!!!! La decisión más grande de mi vida que he tenido que hacer, me fue dada en la Escuela secundaria, estaba en mis tres ano y jugue a cautro anos en el equipo fútbol del varsity. En el comienzo de la temporada, sabía que iba a hacer...
Wednesday, March 28, 2007 at 8:50pm

Foreign Languages
Can someone proof read this spanish paragraph for me. La decisión más grande de mi vida que he tenido que hacer frente, me fue dada en High School secundaria. En High School secundaria, estaba en mi año menor y jugué a fútbol del varsity. En ...
Wednesday, March 28, 2007 at 4:33pm

Chemistry
A cement compound CaO.Al2O3.10H2O gives certain peaks when using the powder diffraction method. The compound now increases its water of crystallization to become CaO.Al2O3.11H2O.Will the diffraction pattern obtained be basically the same as the former, with only a slight ...
Wednesday, March 28, 2007 at 12:41pm

math
A specific brand of bike comes in two frames, for males or females. Each frame comes in a choice of two colors, red and blue, and with a choice of three seats, soft, medium, and hard. a) Use the counting principle to determine the number of different arrangements of bicycles ...
Monday, March 26, 2007 at 3:36pm

math
A specific brand of bike comes in two frames, for males or females. Each frame comes in a choice of two colors, red and blue, and with a choice of three seats, soft, medium, and hard. a) Use the counting principle to determine the number of different arrangements of bicycles ...
Monday, March 26, 2007 at 1:25pm

Math
In an experiment, a pair of dice is rolled and the total number of points observed. (a) List the elements of the sample space (b) If A = { 2, 3, 4, 7, 8, 9, 10} and B = {4, 5, 6, 7, 8} list the outcomes which comprise each of the following events and also express the events in...
Sunday, March 25, 2007 at 8:40am

Math
) In an experiment, a pair of dice is rolled and the total number of points observed. (a) List the elements of the sample space (b) If A = { 2, 3, 4, 7, 8, 9, 10} and B = {4, 5, 6, 7, 8} list the outcomes which comprise each of the following events and also express the events ...
Sunday, March 25, 2007 at 1:52am

math correction
Problem#1 Find the length x in each triangle. Express your answer in simplified radical form. Leg 1 = 8 hypotenuse = 10 leg 2 = x My answer is: x = ã27 Problem #2 Geometry. For the home described in exercise 15, if the roof is 7 m from peak to eave and the attic ...
Saturday, March 24, 2007 at 8:17pm

biology
please help me unscrample the following words: (the space means thate the anagram has two words in it, but the space is not necessarily at the space) rmns teizysecntiore nt roetssieitrsic id ksdxlne so derrecisgntdie Thank you very much for your time! -Lily ...
Monday, March 19, 2007 at 11:52pm

English
Can someone please proofread my paper? Thanks. PlayMakers Repertory Company’s production of The Bluest Eye on Wednesday, February 28, 2007 at 8 P.M. was as stimulating as the Pulitzer-prize winning novel written by Toni Morrison. Trezana Beverley, the director, ...
Sunday, March 18, 2007 at 11:44pm

Spanish Essay: Looking for Corrections
Hello. Just wondering if anyone could look this over for me and make any corrections. It'd be really appreciated. I've never been a good writer in Spanish, and it's this once-a-quarter essay projects that cause me trouble. Thanks in advance for any help! Gracias...
Saturday, March 17, 2007 at 7:09pm

drivers ed
when crossing multilane highways, you should treat each side as a one way street. TRUE FALSE??? I would say true. If there is an island in the middle, cross one half of the highway at a time. And nearly all US highways have an island in the middle. I think Leo assumes that ...
Wednesday, March 14, 2007 at 11:44pm

science
I need to know about the wind patterns, tides/high and low,or upwelling for the north sea,irish sea,and the bay of biscay Thank you for using the Jiskha Homework Help Forum. Here is what I find: 1. http://gpc.edu/~pgore/Earth&Space/GPS/wa​ves-currents-tides.html 2. http...
Wednesday, March 14, 2007 at 10:05am

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