Homework Help: Science: Outer Space

Recent Homework Questions About Outer Space

physics
An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the reaction force is zero ...
Sunday, November 22, 2009 at 9:33pm

Physics
Two astronauts, one of mass 61 kg and the other 82 kg, are initially at rest in outer space. They then push each other apart. How far apart are they when the lighter astronaut has moved 12 m?
Sunday, November 22, 2009 at 4:08pm

physics
A 2000 kg space probe is moving rightward in empty space along the x axis at 12 m/s. One of the probe’s rockets is fired providing a thrust of 1800j N along the y axis. The rocket fires for 1.5 s. How can I derive the equation for the trajectory of the probe during the ...
Sunday, November 22, 2009 at 12:41pm

physics
It has been suggested that rotating cylinders about 12 mi long and 5.4 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth?
Saturday, November 21, 2009 at 12:54am

Literature
'Imagine that you are an extremely intelligent alien from outer space, but you have never seen a human before. For the very first time, you watch a human get out of bed, brush their teeth, sing in a chorus, or play softball. Choose a few of these activities or some others ...
Thursday, November 19, 2009 at 2:01pm

space
I can't use wikipedia
Tuesday, November 17, 2009 at 9:33pm

space
What is the color of the star HD 217107 in the constellation Pisces?
Tuesday, November 17, 2009 at 9:23pm

Physics
(a)Compute the value of G at a point in space that is 7.0X10^6 m from the center of the earth. What will be the value of G at a point with a radius twice that in (a)?
Sunday, November 15, 2009 at 6:57pm

ART paper
This is for my art paper but i was wondering if somebody can check my grammar mistakes...I'd really appreciate it..it is due 11/12/09 Formal Analysis: A Geometric krater, from Dipylon cemetery, Athens date back to 750BC from Geometric Period, is of the magnificent creative...
Wednesday, November 11, 2009 at 5:29pm

physics
Which has more momentum, a speeding baseball or an ocean liner at rest in a harbor? Baseball. Ocean liner. Both the same. Can't say without more information. 2 . A truck moves with a certain momentum. If both its speed and its mass are doubled, how much greater is its ...
Monday, November 9, 2009 at 12:28pm

Grammar and Composition
ok, after i posted this yesterday: ok, now that i have my pet peeve, i have to fill out this sheet. (please read my earlier post for more info on the assignment) Pet Peeve--Organizational Sheet Audience: Who will be your audience? You must indicate an audience that your ...
Monday, November 9, 2009 at 11:56am

9th Chemistry
Why is there a big space in the periodic table between the 2nd & 3rd periods? The activity of the electrons is related somehow.
Sunday, November 8, 2009 at 8:54pm

childhood
By providing shelves low enough for children to select materials, you encourage the development of A Social skills B solitary play C Cleanliness D Independence I believe that A is the correct answer Which of these factors is most likely to determine the total number of ...
Sunday, November 8, 2009 at 8:50pm

Grammar and Composition
ok, now that i have my pet peeve, i have to fill out this sheet. (please read my earlier post for more info on the assignment) Pet Peeve--Organizational Sheet Audience: Who will be your audience? You must indicate an audience that your delivery is geared toward. ...
Sunday, November 8, 2009 at 3:39pm

Physics
Hi, I had some questions about Physics and Newton’s Three Laws of Motion and was wondering if someone could possibly help me. I wasn't sure if my answers were correct and I need to make sure they are. #1 Write out in words what “acceleration ~ net force” ...
Saturday, November 7, 2009 at 6:47pm

Physics
Hi, I had some questions about Physics and Newton’s Three Laws of Motion and was wondering if someone could possibly help me. Some of the questions I wasn’t sure about the answers. #1 Write out in words what “acceleration ~ net force” means. My Answer: I ...
Saturday, November 7, 2009 at 4:46pm

physics
Upon its return voyage from a space mission, the spacecraft has a velocity of 24000km/h at point A, which is 7000km from the center of the earth. Determine the velocity of the spacecraft when it reaches point B, which is 6500km from the center of the earth. The trajectory ...
Friday, November 6, 2009 at 7:04pm

algebra 2.
Mr. Green, the Herbarium's owner, has come to you with another problem to solve. He wants to create a new sales display featuring giant potted plants and plants in smaller hanging baskets. He wants to set up the display in such a way that he can maximize his profit from ...
Thursday, November 5, 2009 at 12:28pm

science
what is the speed needed to launch a space crop in outer space?
Wednesday, November 4, 2009 at 7:45am

Corporate Finance --
PBC Ltd., a general insurance company, has historically focused its business strategy in eastern Canada. Management is now considering a plan to expand into western Canada and, as a trial, is evaluating the opening of an office in Vancouver. If the office turns out to be a ...
Monday, November 2, 2009 at 5:45pm

Physics
Astronauts who spend long periods in outer space could be adversely affected by weightlessness. One way to simulate gravity is to shape the spaceship like a cylindrical shell that rotates, with the astronauts walking on the inside surface. Explain how this simulates gravity. ...
Sunday, November 1, 2009 at 4:38pm

space science
how does the size of the moon's core support the impact theory of the moon's formation? please help and thank you
Sunday, November 1, 2009 at 3:42pm

Writing I
Label each sentence below. Use S for simple, CD for compound, CX for complex, and CD-CX for compound-complex. 1. Do you know the theory of black holes? 2. Objects in space have gravitational pull, so smaller objects are attracted to larger object. 3. Throw a rock into the air...
Friday, October 30, 2009 at 10:47pm

English
Lisa thinks the people will be happy in the future. They will enjoy their holidays and can travel to the space. But Tommy thinks the people will be unhappy in the future. They will suffer from hunger and air pollution. (Would you like to correct the passage? Thank you.)
Friday, October 30, 2009 at 3:10am

English
1. Lisa thinks people will be happy in the future. They will have more food and longer holidays. They can also travel to the space. However, Tommy thinks people will be sad in the future. They will suffer from hunger, air pollution and water pollution. 2. Lisa looks on the ...
Wednesday, October 28, 2009 at 4:54pm

computers
If a term paper consisted 42 pages,each containing 40 lines of 100 symbols each (counting each space as symbol)was to be encoded using unicode, how many bytes of storage space would be required?
Sunday, October 25, 2009 at 11:21am

Technology
is there anything i should add to my answer: 1. There are seven inputs common to all technological systems. List these inputs and give an example of each one. There are seven inputs common to all technological systems. These include people, materials, tools (machines), energy...
Saturday, October 24, 2009 at 3:33pm

art
Compare and contrast the representation of weight and space in the painting of The Good Shepherd in the Catacomb of Saints Pietro and Marcellino and the mosaic of Justinian and Attendants in Ravenna's Church of San Vitale. Devote and space. In your third paragraph discuss ...
Friday, October 23, 2009 at 4:50pm

physics
It has been suggested that rotating cylinders about 12 mi long and 4.6 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth?
Thursday, October 22, 2009 at 2:33am

cathedral
How do you figure out the space and volume ratio cube
Wednesday, October 21, 2009 at 12:18pm

physics - linear momentum with rockets
A rocket of total mass 3180 kg is traveling in outer space with a velocity of 115 m/s. To alter its course by 35.0 degrees, its rockets can be fired briefly in a direction perpendicular to its original motion. If the rocket gases are expelled at a speed of 1750 m/s, how much ...
Friday, October 16, 2009 at 2:24am

math
1. You have recently found a location for your bakery and have begun implementing the first phases of your business plan. Your budget consists of an $80,000 loan from your family and a $38,250 small business loan. These loans must be repaid in full within 10 years. a) What ...
Wednesday, October 14, 2009 at 7:57pm

Physics
An astronaut is taking a space walk near the shuttle when her safety tether breaks. What should the astronaut do to get back to the shuttle? Answer: Take a tool from her tool belt and throw it away from the shuttle. Next Question:Assuming that the astronaut can throw any tool ...
Tuesday, October 13, 2009 at 7:18pm

physics
You are explaining to friends why astronauts feel weightless orbiting in the space shuttle, and they respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating how much weaker gravity is at h = 330 km above ...
Monday, October 12, 2009 at 9:37pm

Accounting
I am having trouble with this problem that is due tonight. Can someone please help!! I am unsure what to do with the information given after the adjusted trial balance. Do I add those numbers into the adjusted trial balance or what do I do with them? HELP!! BizKid Company’...
Sunday, October 11, 2009 at 9:01pm

Math
How much space (in ft³ ) will be taken up by the 458 balloons.
Sunday, October 11, 2009 at 8:06pm

physic
Jules Verne in 1865 suggested sending people to the Moon by firing a space capsule from a 220-m-long cannon with a launch speed of 10.97 km/s. What would have been the unrealistically large acceleration experienced by the space travelers during launch? Compare your answer with...
Thursday, October 8, 2009 at 9:01am

Bio
What's the homeostatic response to increasing dead space? If you increase dead space the respiratory frequency decreases, right? Can you help me elaborate on this point and guide me to any references. Thanks!
Thursday, October 8, 2009 at 12:53am

space
in whgich group are the spheres of earth listed in order of increasing density?
Wednesday, October 7, 2009 at 6:22pm

space
does taking a photo from outer space help earth spherical shape?
Wednesday, October 7, 2009 at 6:19pm

english1A- Gender Myths Essay
Can someone proofread my essay and tell me if it makes sense? I don't want it to sound like I'm going off the subject. Gender Myths (Introduction)Society plays a big role on gender identities. People were always taught to dress and behave according to one’s gender...
Wednesday, October 7, 2009 at 4:33pm

biology
it is everything that occupies a place in the space
Tuesday, October 6, 2009 at 10:14pm

English+Essay
I have to write an essay, but I have no idea how to start it. It says that my essay has to be MLA formatted, and only 3/4 to 1 page long. 2 page is the longest it can be and must be double placed. Using MLA format, there's is no way for me a write a proper essay with that ...
Sunday, October 4, 2009 at 11:09pm

Physics
You are explaining why astronauts feel weightless while orbiting in the space shuttle. Your friends respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating the acceleration of gravity 562 km above the ...
Sunday, October 4, 2009 at 8:58pm

Physics
In outer space, a constat net force of magnitude 140 N is exerted on a 32.5 kg probe initially at rest. (a) what acceleration does thie force produce? (b) how far does the probe travel in 10.0 s?
Sunday, October 4, 2009 at 7:22pm

Math
I'm doing linear programming and I'm having trouble with this one problem. The Backstage Dance Studio director must plan for and operate many different classes, 7 days a week, at all hours of the day. Saturday is very important day for younger students, and each ...
Tuesday, September 29, 2009 at 7:27pm

Algebra 2
I'm doing linear programming and I'm having trouble with this one problem. The Backstage Dance Studio director must plan for and operate many different classes, 7 days a week, at all hours of the day. Saturday is very important day for younger students, and each ...
Tuesday, September 29, 2009 at 6:36pm

Math
Budget $80,000 & $38,000. 25% OF THIS BUDGET WILL BE USED TO RENT BUSINESS SPACE & PAY FOR UTLITIES.Write an algebraic expression that indicates how much money will be spent on business space & utilities. Don't solve. How much money will rent & utilities cost? Explain how ...
Sunday, September 27, 2009 at 10:45am

study skills
List 10 things a new high school student can do to be more organized. I have 1. Keep a planner 2. Don't procrastinate on your homework. 3. Keep your study space for studying only. 4. Keep a calander so you can schedule after school activities. 5. Have everything you need ...
Sunday, September 27, 2009 at 9:01am

math
1. You have recently found a location for your bakery and have begun implementing the first phases of your business plan. Your budget consists of an $80,000 loan from your family and a $38,250 small business loan. These loans must be repaid in full within 10 years. The first ...
Saturday, September 26, 2009 at 6:33pm

Math
List the elements in the sample space of the experiment. A 6 sided die is rolled. The sides contain the numbers {1,2,3,4,5,6}. List the sample space of rolling one die. A){6} B){1,2,3,4,5,6} C){36} D)None of these. My answer is: B){1,2,3,4,5,6}. Is this correct? Thanks.
Thursday, September 24, 2009 at 8:45pm

Honors Chemistry
In my vocabulary crossword puzzle, I have one clue answer left to fill in the puzzle, but the clue doesn't match anything that even EXISTS: 9. A group 18 element (on the periodic table) Answer so far: N??E?????S NONE of the group 18 elements fit in here, though. And I ...
Thursday, September 24, 2009 at 8:31pm

Statistics
Events A, B, and C are defines on sample space S. Their corresponding sets of sample points do not intersect and their union is S. Further, event B is twice as likely to occur as event A, and event C is twice as likely to occur as event B. Determine the probability of each of ...
Thursday, September 24, 2009 at 11:58am

Chemistry
Can someone please help me determine if these questions are correct. If there not can you point me in the rightdirection...please...please...and thank you! 1. Compared to the particles of a gas, the particles of a liquid a. Are not in constant motion b. Collide with the sides ...
Wednesday, September 23, 2009 at 12:03pm

math
Suppose that an experiment has five separate mutually exclusive outcomes: A, B, C, D, and E. If the sample space for the experiment is a uniform sample space, what is P (A, B or E)?
Tuesday, September 22, 2009 at 9:25pm

space
why is outer space considered science?
Tuesday, September 22, 2009 at 8:06pm

Microecomices
In each of the following cases, explain whether you think the situation is efficient or not. If it is efficient , why not? What actions would make the situation efficient? (a) Electricity is included in the rent at the your dorm. Some of the resdients in your dorm leave lights...
Tuesday, September 22, 2009 at 2:15am

6th grade math
You are putting up a 60 foot long fence in your backyard. According to the manufacturer's instructions, the fence posts should be equally spaced along the length of the yard. List all the possible spacing options if the amount of space between the posts is a whole number ...
Monday, September 21, 2009 at 9:26pm

Chemistry
Will someone please let me know if these answers are correct or not? If there not can you help me with them? Thanks so much in advance ;-) 1. In a tetrahedral molecule, how many unshared pairs of valence electrons does the central atom have? a. None b. One c. Two d. Three e. ...
Monday, September 21, 2009 at 3:02pm

science
I can travel where are no molecules,but never through a brick.I can travel through space,but never around a corner.What am I?
Monday, September 21, 2009 at 11:27am

algebra
Moon - 240000 mi Jupiter - 391000000. The space vehicle would take how many days to reach Jupiter? Saturday,
Sunday, September 20, 2009 at 1:40pm

MATH 157
List the elements in the sample space of this experiment: a 6 sided die is rolled. the sides contain the numbers 1,2,3,4,5,6. list the sample space of rolling one die.
Saturday, September 19, 2009 at 9:04pm

Ecology
A space can hold a maximum of 256 paramecia before over-crowding. The paramecium undergoes 8 cell divisions before over-crowding. Suppose that the paramecium takes 2 hours to divide one, how many hours will it take the paramecium to reach maximum capacity?
Saturday, September 19, 2009 at 4:04pm

physics
the solid fuel rocket boosters used to launch the space shuttle are able to lift the shuttle 45 kilometers above earths surface. During the 2.00 min that the boosters operate, the shuttle accelerates from rest to a speed of nearly 7.50 x 10^2 m/s. What is the magnitude of the ...
Tuesday, September 15, 2009 at 9:51pm

Types of Violence
Types of Violence For each of the following scenarios, write the correct number of the heading in the space beside it. Each heading may be used more than once. 1. Financial abuse 2. Physical abuse 3. Sexual abuse 4. Bullying 5. Psychological/Emotional abuse A. A grade eleven ...
Monday, September 14, 2009 at 6:59pm

outer space
how made the name science
Saturday, September 12, 2009 at 12:11pm

Geometry
The inside lane in the track is 50m and the outside of the track is 100m 4 lanes are added around the outside of the track shown above. Each lane is 1 meter wide and the lanes are immediately next to each other with no space in between. If Teresa runs once around the outside ...
Friday, September 11, 2009 at 5:02pm

physics
The drawing shows a force vector vector F that has a magnitude of 600 newtons. It lies at alpha = 67° from the positive z axis, and beta = 31° from the positive x axis. (that's the diagram given) webassign. (delete this space) net/CJ/p1-39alt.gif (a) Find the x ...
Thursday, September 10, 2009 at 9:53pm

Physical Education
"what are the properties of space and what is general space"?
Wednesday, September 9, 2009 at 3:32pm

MATH 156
The inside lane in the track is 50m and the outside of the track is 100m 4 lanes are added around the outside of the track shown above. Each lane is 1 meter wide and the lanes are immediately next to each other with no space in between. If Teresa runs once around the outside ...
Wednesday, September 9, 2009 at 2:35pm

Computers(Java Programming)
Service Class: Lottery Write a Lottery class that simulates a lottery. The class should define an array of five integers named lotteryNumbers. The constructor should use the Random class (see the Java API) to generate a random number in the range of 0 to 50 for each element on...
Tuesday, September 8, 2009 at 12:35am

Biology
bio 1003 lab notes baruch Experimental setup 1 contains live, germinating pea seeds. Experimental setup 2 contains germinated then boiled pea seeds. Experimental setup 3 contains dry pea seeds that have not begun to germinate. Experimental setup 4 is a tube of phenol red and ...
Monday, September 7, 2009 at 11:10pm

physic
Jules Verne in 1865 proposede sending men to the moon by firing a space capsule from a 220-m-long cannon with final velocity of 10.97 km/s. what would have beed the unrealistically large accelerationexperienced travels during launch? compare your answer with the free-fall ...
Monday, September 7, 2009 at 9:02pm

space
How early south africans incorporated the stars into their world,explaining how they used the stars to mark seasons and events and retelling some legends and stories linked with specific stars and constellations
Sunday, September 6, 2009 at 4:58pm

science
The amount of matter in an object is its______. The amount of matter in a given space or volume is its_______.
Saturday, September 5, 2009 at 1:33pm

6th grade
in my workbook it says why do you think earth looks like a blue and white marble from space ? the reason why is because there coler blind PLEASE HELP !!!!
Tuesday, September 1, 2009 at 5:43pm

Physics
1. What is the weight of a 24kg mass on Mars if its surface gravitaional field = 3.5N/KG? a) 235.2 N b) 84 N c) 24 kg d) 6.86 kg 2. A space shuttle is placed in a circular orbit around the Earth. It then thrusts its engine and moves to a new orbit, as shown below. Which ...
Monday, August 31, 2009 at 6:02am

Physics
(A) Identify how the gravitational potential energy changes as a shuttle takes off from the launch pad. (b) Explain the consequences to the space craft and its occupants if the shuttle is undergoing re-entry, and the angle of re-entry is significantly greater (steeper) than ...
Monday, August 31, 2009 at 5:59am

History
Can somebody please look this over and let me know if I am right with all of them? I am to tell who proposed what. Head Start-Johnson Peace Corps- Kennedy Job Corps- Johnson Civil Rights Act-Johnson Voting Rights Act-Johnson New food stamp program- Kennedy Medical aid for the ...
Tuesday, August 18, 2009 at 8:03pm

economics
1. The rationale for punishment and correction comes from A. the social contract theory. B. RawlsÃ‚Â’s theory. C. utilitarianism. D. egoism. 2. The two major justifications for treatment and punishment are A. incapacitation and deterrence. B. just ...
Friday, August 14, 2009 at 8:45am

Science HELLLP!!
How do astronauts fix parts in space?
Friday, August 14, 2009 at 2:13am

Science
How do astronauts fix things in a space station?
Friday, August 14, 2009 at 1:42am

physics
"The actual value of computed g, assuming no drag, also varies somewhat over the earth's surface due to the earth's spin (which causes a latitude-dependent centrifugal force to get subtracted), lack of a perfect spherical shape of the earth, and the proximity of ...
Thursday, August 13, 2009 at 1:41pm

English
Should I double space anywhere on this? I'm replying to your advertisement in the San Jose Mercury newspaper. I understand that you’re actively seeking to hire a quality Medical Office Assistant. I worked for The Berman Skin Institute as a Front Desk Receptionist for ...
Wednesday, August 12, 2009 at 2:13am

math
Suppose that an experiment has five separate mutually exclusive outcomes: A, B, C, D, and E. If the sample space for the experiment is a uniform sample space, what is p (a or e)
Tuesday, August 11, 2009 at 10:34pm

check geo
places located in high latitudes have: a)the coldest climates on earth B)the same weather as places in other latitiudes. i choose a. places the atmosphere: A)create tides B)has no effect on heat gain or loss C)allows heat to escape quickly in order to cool the planet D)keeps ...
Saturday, August 8, 2009 at 9:13pm

geography check
the atmosphere:A)creayes tides b)has no effect on heat gain or loss c)allows heat to escape quickly D)keeps heat from escaping too quickly into space. i choose b
Saturday, August 8, 2009 at 6:47pm

MATH Prob.
A box contains 13 white cards numbered 1 through13. List the sample space of the event choosing one card with a number greater than 6.
Saturday, August 8, 2009 at 1:01pm

MATH Prob.
A 6-sided die is rolled. The sides contain the numbers 1,2,3,4,5,6. List the sample space of rolling one die.
Saturday, August 8, 2009 at 1:00pm

Math
Can someone please explain this problem? Consider the experiments involving rolling a single die once. Give the probabilities of the events described. Suppose that an experiment has five separate mutually exclusive outcomes: A,B,C,D and E. If the sample space for the ...
Wednesday, August 5, 2009 at 3:37pm

literature
Regarding the difference between fiction and nonfiction, which statement is most accurate? A. Nonfiction writers are more often free to move about in time and space. B. Literary fiction does little except inform and specify. C. Nonfiction writers are free to embellish the ...
Tuesday, August 4, 2009 at 11:19pm

MATH
Suppose that an experiment has five separate mutually exclusive outcomes: A, B, C, D, and E. If the sample space for the experiment is a uniform sample space, what is P(A or B)?
Tuesday, August 4, 2009 at 12:31pm

com130
Write a 1,750- to 2,100-word research project detailing one of the following career choices: o Web developer or administrator o Project manager o Database administrator o Computer programmer o Network and computer systems administrator o Computer engineer (software or hardware...
Monday, August 3, 2009 at 5:31pm

Macroeconomics
9. In each of the following cases, explain whether you think the situation is efficient or not. If it is not efficient, why not? What actions would make the situation efficient? a. Electricity is included in the rent at your dorm. Some residents in your dorm leave lights, ...
Sunday, August 2, 2009 at 9:51pm

Algebra
Twenty-five percent of the budget (which is $118,250) will be used to rent business space and pay for utilities. "Write an algebraic expression that indicates how much money will be spent on business space and utilities". Do not solve.
Sunday, August 2, 2009 at 8:06pm

Chem
An air purifiction system involving litium hydroxide, LiOH, was used. LiOH absorbs carbon dioxide. 2LiOH(s) + CO2(g) <---> Li2CO3(s) + H2O(l) Use Le Chatelier's principle to explain why the amount of time astronauts can spend in a space-craft is limited?
Saturday, July 25, 2009 at 6:25pm

chemistry
A microtube is found to have an ungraduated portion that will contain 0.26 g of water. Upon setting up the experimental apparatus as described in the experiment, a microtube is filled to 0.01 ml with water at 4ºC. At a temperature of 60ºC, the volume of head space ...
Friday, July 24, 2009 at 3:45pm

Finite Math
Solve the matrix equation AX =B for X using: A= [ 2 -3] B= [4 ] [ 1 5] [2 ] (theres a blank space between the 4 and the 2)
Thursday, July 23, 2009 at 6:07pm

accounting and finance
unadjusted trail balance(December 31,2008)(Bed Bugs R Us Ltd): prepaid rent $8,000 rent expense $24,000 adjusting entry question: 4 months worth of prepaid rent had been purchased on September 1 2007 in an adjacent building to b used as thier office. The rent on this space was...
Monday, July 20, 2009 at 3:00pm

college
unadjusted trail balance(December 31,2008)(Bed Bugs R Us Ltd): prepaid rent $8,000 rent expense $24,000 adjusting entry question: 4 months worth of prepaid rent had been purchased on September 1 2007 in an adjacent building to b used as thier office. The rent on this space was...
Monday, July 20, 2009 at 2:24pm

Math
A property company purchases a new office space for lease to a small business for $2,400,000 including a land value of$400,000. the property is placed in service on March 15,1999.using MACRS,what is the depreciation on this property at the end of its first year?
Thursday, July 9, 2009 at 11:40pm

Chemistry
Some (or all) of the structures below are representations are of the same molecule. How many unique structures are shown (i.e., how many structures with different molecular formulae)? Image: img6(dot)imageshack(dot)us/content.php?page=done&l=img6/5716/80685628.jpg&via=...
Thursday, July 2, 2009 at 12:27am

MATH
a library shelf is 9 ft wide. a set of books fills 1/6 of the shelf space.each book in the set is 3/5 inch thick. how many books are in the set? I have tried working this fraction problem and I am stuck
Tuesday, June 30, 2009 at 1:13am

math 209
Swimming space. The length of a rectangular swimming pool is 2x 1 meters, and the width is x 2 meters. Write a polynomial A(x) that represents the area. Find A(5).
Monday, June 22, 2009 at 8:40pm

11th grade
how man built space station in universe
Friday, June 19, 2009 at 1:01am

Physics
Outside the International Sapce Station, a 60 kg astronaut holding a 4.0 kg object (both initially at rest) throws the object at 10 m/s relative to the space station. A 50 kg astronaut, initially at rest, catches the object. What is the speed of the separation of the two ...
Thursday, June 18, 2009 at 1:59am

science
why a necked human body bursts in space
Friday, June 12, 2009 at 1:54am

check
Revise each frag. by attaching it to a related sentence or by recasting it as a full sentence. Sentences: 1.The first person to produce an artifical dye comercially was William Perkin. A nineteen-year-old Englishman. 2. Many food producers package their products in red. ...
Monday, June 8, 2009 at 1:46pm

earth/space science
How does length of the year change with distance from the sun?
Sunday, June 7, 2009 at 3:52pm

Chemistry
If 200 ml of gas held at a constant pressure has a starting temperature of 300 degrees K, and it expands to fill a 300 ml space, what would be the new temp? (I got 454.54) Thanks!
Thursday, June 4, 2009 at 9:08pm

Science - Weather
Describe what would happen to the temperature on Earth if the amount of energy reflected back to space a) increased to 80% b) decreased to 5%
Thursday, May 21, 2009 at 11:13pm

Logarithmic Function
A spacecraft is approaching a space station that is orbiting Earth. When the craft is 1000 km from the space station, reverse thrusters must be applied to begin braking. The time, t, in hours, required to reach a distance, d, in km, from the space station while the thrusters ...
Sunday, May 17, 2009 at 8:37pm

space
1 what is the name of the first man to move round the orbit round thesun 2 the first man to move in the orbit round the sun 3 tts country 5 the year of travel 7 the month YHANKS!!!!!!!!!!!!!!!!!!!!!!
Saturday, May 16, 2009 at 8:39am

Chemistry
Rank the crystal lattice structures in order of decreasing efficiency of space in the structure? Face centered cubic, body centered cubic, simple cubic, hexagonal close packing.
Thursday, May 14, 2009 at 11:05pm

physics
Party hearing. As the number of people at a party increases, you must raise your voice for a listener to hear you against the background noise of the other partygoers. However, once you reach the level of yelling, the only way you can be heard is if you move closer to your ...
Thursday, May 14, 2009 at 10:10pm

Grammar
Are these correctly answered?- Choose the answer that best completes the sentence: 1.Painting the door in the storage area were Lizzie and ______ A.she B.her C.them D.me A 2.Each of the boys had prepared _____ remarks well. A.his B.their A 3.Carefully balanced on the arm of ...
Wednesday, May 13, 2009 at 5:09pm

English
I have two dice. I will roll the dice and according to the numbers on the faces of the dice, you should solve each problem in the space. (After rolling the dice). I got 1 and 7. Who is # 17? Stand up and solve the first problem in the first space on the dice board.... Good job...
Wednesday, May 13, 2009 at 7:00am

Math
The weight W of an object varies inversely as the square of the distance d from the center of the earth. At sea level (3978 mi from the center of the earth), an astronaut weights is 110lb. Find her weight when she is 459 mi above the surface of the earth and the space craft is...
Tuesday, May 12, 2009 at 9:00pm

space
1give the diameter of the earth 2how far is the earth from the sun 3describe what causes night and day
Sunday, May 10, 2009 at 4:36am

CURRENT POSTS
ALL POSTS BY MYSTERYCHICKEN TODAY CAN BE DELETED; THEY ARE TAKING SPACE AND ARE NOT NEEDED. [Note: Not y912f, just MC] Thanks!
Saturday, May 9, 2009 at 6:43pm

space
What are the parts of a spacecraft and what is the science behind them?
Thursday, May 7, 2009 at 12:37pm

Chemistry
Can someones please check my work? 1. Why does a liquid take the shape of whatever container it is in but does not expand to fill the container completely? A: It takes the shape of its contaienr because its particles can slip past each other. but it has fixed volume and does ...
Thursday, May 7, 2009 at 11:17am

Science (URGENT)
Can someones please check my work? 1. Why does a liquid take the shape of whatever container it is in but does not expand to fill the container completely? A: It takes the shape of its contaienr because its particles can slip past each other. but it has fixed volume and does ...
Thursday, May 7, 2009 at 2:57am

astronomy & space
What is the redshift of a galaxy which lies at a distance of 50 mpc, asssuming that the hubble constant is H_0 = 67 km s^-1 Mpc^-1? assume that the speed of light is c=3.0x10^5 Km s^-1 please answer to an accuracy of 2 sig figs. Thankyou.
Tuesday, May 5, 2009 at 5:21pm

Physical Science
I've answered these two questions and need someone to check them for me: 1.Describe two characterisitics that light and sound have in common. Ans- They both transfer energy [and I need help thinking of a second one] 2.Describe two ways in which light and sound are ...
Tuesday, May 5, 2009 at 10:05am

Science
Help with these questions. 1. Describe a disadvantage of using a telescope positioned in space. 2. What advantage is there to doing laboratory experiments on the International Space Station rather than doing the same experiments on Earth? 3. Explain why it is unlikely that ...
Sunday, May 3, 2009 at 3:12am

Linear Algebra
V = Mnxn is a space vector formed by all the square matrices. Is W = {A in Mnxn : A^x = A} a subspace of V? Thanks
Friday, May 1, 2009 at 9:03pm

math
The position function of a spaceship is below and the coordinates of a space station are (8, 5, 11). The captain wants the spaceship to coast into the space station. When should the engines be turned off? r(t) = (5+t)i + (3+ln(t))j + (9 - 4/(t^2) +1
Friday, May 1, 2009 at 6:17pm

space
what do the pattern of lines in a star's absorption spectrum represent?
Thursday, April 30, 2009 at 6:52pm

Physics - please check over
A charged particle moves at a constant velocity in a straight line through a region in space... a) is the electric field zero in the region? Explain b) is the magnetic field zero i the region? Explain I think a is yes because a charged particle will always create an electric ...
Tuesday, April 28, 2009 at 9:03pm

science
The moon spins,or_____ ,in space. The words to use for this is revolves ...rotates...orbit lunar eclipse...or solar eclipse
Tuesday, April 28, 2009 at 6:02pm

business
i work at a small company that creates and markets video games. it is a 4 story office building.other business in the building are a dentist, young lawyer,and an insurance company.the building supplies space but little else in the way of service. i need to come up with a new ...
Saturday, April 25, 2009 at 5:53pm

Physics
A team is chosen to design an orbiting space station that is shaped like a wheel 5o meters in diameter with is mass of 4*10^5 kg contained in the rim portion of the wheel. The space station will rotate at a rate such that a person working in the wheel will experience a ...
Thursday, April 23, 2009 at 12:55am

To Henri - applied mechanics
When you re-post, be sure to put the SUBJECT AREA in the space marked SCHOOL SUBJECT. Thanks.
Sunday, April 19, 2009 at 8:56am

Physics
Cosmic microwave background radiation fills all space with an average energy density of 4 x 10^-14 j/m^3.(a) Find the rms value of electric field associated with this radiation.(b) How far from a 7.5 kW radio transmitter emitting uniformly in all direction would you find a ...
Friday, April 17, 2009 at 10:51pm

English
I am a high school student and my homework is to write a resume, and in my resume I have to write my recent jobs; but me I havent ever worked before what should I write in that space for my recent jobs. Thank You.
Friday, April 17, 2009 at 8:44am

PHYSICS PLLZ HELP
1- wave velocity is related to a- period b-wavelength c-amplitude d-all of these 2- wave amplitude is related to a- wave velocity b- frequency c- energy d-wave length 3-which of the following radiation has te smallest frequency? a- infrared b- visible c- ultraviolet d-x-rays 4...
Tuesday, April 14, 2009 at 9:09pm

physics
I am having some difficulty with a few problems on my homework and I'm hoping to get some insight. the first one: a robotic space probe of mass 7600 KG is traveling through space at 120 m/s. Mission control determines that a change in course of 30.0 degrees is necessary ...
Monday, April 13, 2009 at 1:11pm

Math
I need to research the following fractal-related topics and find enough information to write five sentences. a. a Peano curve b. the devil's staircase c. self-similarity d. space-filling curve I also need to find out how the concept of fractals is applied in modern ...
Tuesday, April 7, 2009 at 11:09pm

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