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April 20, 2014

Homework Help: Science: Outer Space

Recent Homework Questions About Outer Space

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Physics
The following might be of some help to you. 1/23/02 What is the final burnout velocity of the Space Shuttle? The final burnout velocity of the Space Shuttle, or any rocket for that matter, is a function of the altitude at burnout and the orbit that the rocket is being injected...
Wednesday, December 7, 2011 at 5:07pm

Physics
The space shuttle has a weight 2.00 x 10^7 N. The shuttle is accelerated upward at a rate of 5.50 m/s^2. What is the mass of the shuttle? What is the thrust (force) of the combined engines? What is the magnitude of the net force applied to the space shuttle?
Wednesday, December 7, 2011 at 4:35pm

physics
A rocket in outer space with a velocity of 12,000 m/s. How long will it take to travel 3,000,000 meters?
Wednesday, December 7, 2011 at 3:36pm

Physics
A 115 kg astronaut on a space walk pushes against her space capsule that has mass 2250 kg. The astronaut accelerates 1.50 m/s2, 0°. (a) Find the force exerted on the astronaut. (b) Find the force exerted on the capsule. (c) Find the acceleration of the capsule.
Monday, December 5, 2011 at 7:19pm

Math
A model of the ocean floor takes up 2/5 of the space in an aquarium. if 3/8 of the model is coral, what fraction of the space in the aquarium is taken by coral?
Monday, December 5, 2011 at 4:55pm

science
Earths mass is 6 x 10^24kg and its radius is 6.38 x 10^6m (6380 km ). Use the inverse-square law to show that in space-shuttle territory, 200 km above the earths surface the force of gravity on a shuttle is about 94% of that at the earths surface.
Monday, December 5, 2011 at 6:21am

English
Both sentences are fine. Put a space after that comma in the first sentence, though.
Sunday, December 4, 2011 at 8:21pm

chemistry
Which is not a true statement concerning electromagnetic radiation? It travels through space at 3.0 x 1010 cm/s. It travels in a straight line. It has the fastest speed possible in nature. The sun is a source of it.
Thursday, December 1, 2011 at 6:10pm

physics
Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. a.) Calculate the speed of a 103-kg ...
Wednesday, November 30, 2011 at 8:36pm

Physics
Early skeptics of the idea of a rotating Earth said that the fast spin of Earth would throw people at the equator into space. The radius of Earth is about 6400 km. Show why this objection is wrong by determining the following information. a.) Calculate the speed of a 103-kg ...
Wednesday, November 30, 2011 at 8:30pm

english
The best way to correct this is to first tell you the kinds of mistakes you made. Then I'll take the entire story, adding punctuation, correcting spelling, etc. 1. When you begin to tell a story, decide first of all if you are telling it in the Present Tense (now) or the ...
Tuesday, November 29, 2011 at 5:44pm

Physics
Engineers are trying to create artificial "gravity" in a ring-shaped space station by spinning it like a centrifuge. The ring is 100m in radius. How quickly must the space station turn in order to give the astronauts inside it weights equal to their weights at the ...
Sunday, November 27, 2011 at 6:59pm

Physics
Engineers are trying to create artificial "gravity" in a ring-shaped space station by spinning it like a centrifuge. The ring is 100m in radius. How quickly must the space station turn in order to give the astronauts inside it weights equal to their weights at the ...
Sunday, November 27, 2011 at 2:35pm

English
1. OK 2. OK 3. I'd say "electric" not "electrical." 4. Use "inhabited." 5. I don't understand "close to this." 6. "electric" 7. "...explain to everyone..." 8. "...older people's attitudes by talking...
Sunday, November 27, 2011 at 2:29pm

space
2ft(12in/ft)(8 oneeights/inch)=24*8 eights in two feet, which is 10 au. xxxxeigthinch/au= 24*8/10=19.2 eigthinches is one AU. or 2.4inch is one AU. or 2 inches + 2.4 eights is one AU.
Sunday, November 27, 2011 at 1:59pm

space
I'm doing a solar system project for school. The problem I'm facing is that I'm am doing every two feet is 10 astronomical units, but how many 1/8 inch's is one astronomical unit?
Sunday, November 27, 2011 at 1:26pm

ALGEBRA
Many states offer personalized license plates. California, for example, allows personalized plates with seven spaces for numerals or letters, or one of the following four symbols. What is the total number of license plates possible using this counting scheme? (Assume that each...
Saturday, November 26, 2011 at 5:54pm

Spanish Preterit for Mía
EL PRETERITO: THE PRETERIT OF REGULAR VERBS: -AR: hablar = to speak yo hablé = I spoke, I DID speak tú hablaste él/ella/usted habló nosotros/nosotras hablamos vosotros/vosotras hablasteis ellos/ellas/ustedes hablaron endings: é, aste, ó...
Saturday, November 26, 2011 at 1:43pm

Physics help please
The space shuttle orbits at a distance of 335 km above the surface of the Earth. What is the gravitational force (in N) on a 1.0 kg sphere inside the space shuttle. Assume that the mass of the Earth is 5.98x1024 kg and the radius of the Earth is 6370 km Compare (as %) the ...
Friday, November 25, 2011 at 8:36pm

physics
A 2.0 nF parallel plate capacitor with a sheet of mylar (k= 3.1) filling the space between the plates is charged to a potential difference of 90 V and is them disconnected. How much work would be required to completely remove the sheet of mylar from the space between the two ...
Tuesday, November 22, 2011 at 7:57pm

geometry
h ttp://img64.imageshack.us/img64/574/plot​formula.jpg (please remove the space in the link above, because I could not post the full problem) I think that I should use the following: a<b+c ,b<a+c ,c<a+b or the inequality of the means, but I have no idea how to ...
Tuesday, November 22, 2011 at 8:55am

socials
I not find the poster online either but teacher gave us picture and i upload it on internet. i give link down below. i leave space in there it not allow me to post link so i leave space in there. last poster is the : If they over-run canada your money'll be useless... it ...
Monday, November 21, 2011 at 6:56pm

math problem
please help me solve 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 ...
Monday, November 21, 2011 at 5:26pm

gravity
Addendum to my earlier response. A reduction in velocity of only 1.5m/sec. will drop the space shuttle into an ever so slightly elliptical orbit with an apogee of 6828km, a perigee of 6825.6km. and a period of 5611.86 sec. or 93.53min., allowing the shuttle to catch up with ...
Monday, November 21, 2011 at 3:00pm

Linear Algebra
The dimension of vector space R3 is 3. n=(2,3,2) occupies one of the three dimensions, so the subspace orthogonal to n has a dimension of two, i.e. two vectors span the remaining subspace. The basis of the remaining subspace can be in many forms. One way is to start with an ...
Sunday, November 20, 2011 at 11:47pm

Pre calculus
Not sure where the calculus comes into play here. The figure will obviously have width equal to twice the height, so that the radius of the semicircle extends all the way to the top of the rectangle. Any wider, and the semicircle will not fit. Any narrower, and there is unused...
Sunday, November 20, 2011 at 10:20pm

Chemistry
The space shuttle uses fuel cells( AFC's) to produce electricity . In these fuel cells,O2 reacts with water and electrons to produce OH- ioins travel to the other electrode where they react with H2 to release electrons and produce more water. Based on this information,...
Sunday, November 20, 2011 at 9:17pm

finiance
WM3 is a company who is looking to expand. There is a potential deal with a furniture company but MW3 is not sure if they should take this deal. The furniture company is offering a 4 year contract for 100,000 units per year at a fixed price of $55.50 per unit. WM3 has ...
Sunday, November 20, 2011 at 7:55pm

PLEASE HELP-PHYSICS HW
A 130 kg astronaut (including space suit) acquires a speed of 2.80 m/s by pushing off with his legs from an 2000 kg space capsule. What is the change in speed of the space capsule? As the reference frame, use the position of the space capsule before the push. If the push lasts...
Sunday, November 20, 2011 at 7:04pm

Math problem
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 ...
Sunday, November 20, 2011 at 4:49pm

Linear Algebra
Find the basis for the following vector space. Please state the dimension of the vector space. S consists of all x in R3 such that x is orthogonal to n=(2,3,2)
Sunday, November 20, 2011 at 3:09pm

gravity
Assume, for discussion purposes, a satellite and the shuttle are in the same 91 minute circular orbit, the satellite 2 minutes ahead of the space shuttle. The shuttle fires its on-orbit thrusters to reduce its orbital velocity. In doing so, the space shuttle drops into an ...
Sunday, November 20, 2011 at 11:18am

gravity
You are an astronaut in the space shuttle pursuing a satellite in need of repair. You are in a circular orbit of the same radius as the satellite (450 km above the Earth), but 24 km behind it. How long will it take to overtake the satellite if you reduce your orbital radius by...
Saturday, November 19, 2011 at 2:17pm

earth
Six artificial satellites complete one circular orbit around a space station in the same amount of time. Each satellite has mass m and radius of orbit L. The satellites fire rockets that provide the force needed to maintain a circular orbit around the space station. The ...
Saturday, November 19, 2011 at 2:03pm

algebra
1. Which expression belongs in the space? |--------------- x-2 |x^2 + 7x - 18 -(x^2-2x) -------- 18 a.5x - 18 b.5x + 18 c.9x - 18 d. 9x + 18
Thursday, November 17, 2011 at 11:00am

math
how many different tetrahedrons are determined by ______ given no four are coplanar? 4 points in space 9 points in space 15 points in space n points in space
Thursday, November 17, 2011 at 7:35am

English
1 OK 2 - need space after the period and a comma in the second sentence 3 - analyst (<~~watch the spelling) or therapist
Thursday, November 17, 2011 at 7:09am

Science
Try some of the following links for information: http://www.google.com/search?q=Which+ele​ctromagnetic+radiation+can+be+used+in+sp​ace+to+detect+low+temperatures%3F&ie=utf​-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:o​fficial&client=firefox-a Sra
Wednesday, November 16, 2011 at 8:53pm

physics
Using Newton's Law of Universal Gravitation, compare the weight of a 68.1 kg astronaut on the surface of the earth to the gravitational pull of the Earth on the same astronaut when she is on the International Space Station. Constants: Average altitude of the ISS above the ...
Wednesday, November 16, 2011 at 6:36pm

physics
Using Newton's Law of Universal Gravitation, compare the weight of a 68.1 kg astronaut on the surface of the earth to the gravitational pull of the Earth on the same astronaut when she is on the International Space Station. Constants: Average altitude of the ISS above the ...
Wednesday, November 16, 2011 at 6:36pm

physics
A box and its contents have a total mass M = 9 kg. A string passes through a hole in the box, and you pull on the string with a constant force F = 77 N (this is in outer space; there are no other forces acting). (a) Initially the speed of the box was vi = 5 m/s. After the box ...
Wednesday, November 16, 2011 at 5:58pm

Algerbra1
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, November 16, 2011 at 5:20pm

Algerbra1
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, November 16, 2011 at 4:15pm

Physics
Which electromagnetic radiation can be used in space to detect low temperatures? Gamma Rays Infra Red Ultra Violet Or any of the others?
Wednesday, November 16, 2011 at 12:17pm

Science
Which electromagnetic radiation can be used in space to detect low temperatures? Gamma Rays Infra Red Ultra Violet Or any of the others?
Wednesday, November 16, 2011 at 11:20am

Physics
Since there is no atmosphere in space, the typical control surfaces such as the aileron, rudder, or elevator, used on an airplane would serve no purpose. All spacecraft use what is called an Attitude Control System(ACS) or a Reaction Control System(RCS) to control the attitude...
Wednesday, November 16, 2011 at 10:51am

Physics
What exerts the force obn a rocket in outer space to make it move forward?
Tuesday, November 15, 2011 at 8:34pm

physics
A rocket is fired in deep space, where gravity is negligible. In the first second it ejects 1/160 of its mass as exhaust gas and has an acceleration of 15.1 m/s^2.What is the speed v_gas of the exhaust gas relative to the rocket? By means of the rocket equation, deltaV = cln(...
Tuesday, November 15, 2011 at 10:44am

algebra
Explain in your own words what it means for an equation to model a real world situation an give an example. -it is right to say that when given a problem, we want to identify the quality of the problem we want to find, translate form word to algebra, and make up an equation ...
Tuesday, November 15, 2011 at 8:51am

physics
A rocket is fired in deep space, where gravity is negligible. In the first second it ejects 1/160 of its mass as exhaust gas and has an acceleration of 15.1 m/s^2.What is the speed v_gas of the exhaust gas relative to the rocket?
Monday, November 14, 2011 at 11:22pm

Science
Ok i got that right :D What is 1 energy from forces in space?
Monday, November 14, 2011 at 6:27pm

Physics
It has been suggested that rotating cylinders about 9 mi long and 5.1 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? ? rad/s
Monday, November 14, 2011 at 12:17pm

physics
It has been suggested that rotating cylinders about 9 mi long and 5.1 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?
Monday, November 14, 2011 at 12:02pm

Math
If the grid is 4x4, then there is a space between rows 2&3 (or columns 2&3). Draw the line through that space.
Monday, November 14, 2011 at 11:16am

Chemistry
An estimation of the radius of a lead atom: a. You are given a cube of lead that is 1.000 em on each side. The density of lead is 11.35 g/cm3. How many atoms of lead are contained in the sample. b. Atoms are spherical; therefore, the lead atoms in this sample cannot fill all ...
Sunday, November 13, 2011 at 8:57pm

Science/Physics
An astronaut is about 20 m from her space station when the rocket thrusters run out of fuel. If she is carrying a few tools and can remove the rocket thruster, what should she do to get back to the space station? Explain reasoning.
Sunday, November 13, 2011 at 6:07pm

socials
Canada was chosen to host this training because it was far from Germany and had a lot of air space and land for airfields.
Friday, November 11, 2011 at 11:00pm

Learning Log
Space betweenyour fingers time capsule
Thursday, November 10, 2011 at 4:00pm

statistics
space shuttle astronauts each consume an average of 3000 calories per day. one meal normally consists of a main dish, a vegetable dish, and 2 different desserts. the astronauts can choose from 11 man dishes, 8 vegetable dishes, and 12 desserts. how many different meals are ...
Wednesday, November 9, 2011 at 4:23pm

Algebra 3
There should be no i (sqrt(-1)) in your answer. "greater than" and "less than" have no meaning in complex number space, unless you are talking about real magnitudes. Your statement " x < +/- 3 " would imply, more simply, x < -3, since ...
Tuesday, November 8, 2011 at 7:53am

CHEM AP please help!!
Why does the octet rule not hold for many compounds containing elements in the third row of the periodic table and beyond? (Select all that apply.) 1. Atoms of elements in the third period are less subject to destabilization from additional electron-electron repulsions. 2. ...
Monday, November 7, 2011 at 5:32pm

working with school-age children
Which of the following is one of the steps for successful inclusion? 1) Use every inch of space in designated areas. 2)Organize all children in an assigned, designated area. 3) Modify appropriate environments and curriculum. 4)Provide every program requested.
Monday, November 7, 2011 at 10:48am

Physics
The atmosphere of Mars exerts a pressure of only 600 Pa on the surface and has a density of only 0.02 kg/m3. (a) What is the thickness of the Martian atmosphere, assuming the boundary between atmosphere and outer space to be the point where atmospheric pressure drops to 0.01% ...
Monday, November 7, 2011 at 3:39am

$$college algebra$$
Consider g(x) = -2x2 + 36x - 142 for x > 9. Find g-1(12). If this value does not exist, the type DNE in the space provided.
Sunday, November 6, 2011 at 10:10pm

Physics
There are two particles (1 and 2) that are moving around in space. The force that particle 2 exerts on 1 is given by: F21(t)=Fx*e^−(t/T)i^ + Fy*sin(2πt/T) j^ Where the parameters have the values: Fx = 13.4 N Fy = -84.2 N T = 74 s tf = 140.46 s Find the average force...
Sunday, November 6, 2011 at 3:55pm

college algebra
Let g(x) = 0.5x + 18. Write the rule for g-1(x). Then, evaluate g-1(x) at x = 20. Enter this result in the space provided.
Friday, November 4, 2011 at 8:44am

consumer mathB
(2.25-1.89)/1.89, converted to %. That would be 19% inflation rate, if the amount of cereal inside stays the same. Quite often, they also make the box smaller, or leave more empty space inside.
Thursday, November 3, 2011 at 10:43am

Math
barry puts TVs on a 15-foot shelf in his electronics store. He allows 2 1/2 feet of space for each TV. He will be able to put 5.5 TVs on the shelf. Is this reasonable or not
Wednesday, November 2, 2011 at 8:55pm

PHYSICS
An astronaut of mass 78.0 kg is taking a space walk to work on the International Space Station. Because of a malfunction with the booster rockets on his spacesuit, he finds himself drifting away from the station with a constant speed of 0.500 m/s. With the booster rockets no ...
Wednesday, November 2, 2011 at 6:43pm

statistics
6. You read in a book about bridge that the probability that each of the four players is dealt exactly one ace is about 0.11. This means that A. in every 100 bridge deals, each player has one ace exactly 11 times. B. in one million bridge deals, the number of deals on which ...
Tuesday, November 1, 2011 at 9:41pm

statistics/probability
describe the sample space for a spinner with four equal sections of blue, red, green and yellow.
Tuesday, November 1, 2011 at 6:37pm

Math
On a game board, landing on blue means to move ahead 1 space, landing on red means to move ahead 2 spaces,a dn landing on orange means to move back 1 space. If you took 30 spins, about where would you expect to be on the game board, relative to where you started?
Tuesday, November 1, 2011 at 5:48pm

physics
A 1000kg rocket is moving forward at 10m/s in space. A 10,000N force is applied to the rocket for one second from behind. How fast is the rocket now traveling? a. 0m/s b. 10m/s c. 15m/s d. 20m/s
Tuesday, November 1, 2011 at 11:15am

Math
An Air Force study indicates that the probability of a disaster such as the January 28, 1986 explosion of the space shuttle Challenger was 1 in 35. The Challenger flight was the 25th mission. a. How many disasters would you expect in the first 25 flights? b. Use the normal ...
Monday, October 31, 2011 at 9:09am

English
Thank you very much for your corrections! Here are other statements on the same newspaper article. 1) The cheetah reintroduction programme is kicking off (starting?) with a meeting of experts in September. 2) The project includes the foundation of a breeding site in which ...
Monday, October 31, 2011 at 7:50am

****college algebra****
Let h(x) = 3x + 4. For what value of x is (h o h)(x) = h(x). If no such value exists, type DNE in the space provided.
Sunday, October 30, 2011 at 11:08pm

****college algebra****
Let g(x) = -2x + 8 and h(x) = 3x + 4. For what value of x is composition (g o h)(x) = (h o g)(x). If no such value exists, type in DNE in the space provided.
Sunday, October 30, 2011 at 11:00pm

Physics
The magnetic field at the charge location is B = mu_o* I/(2*pi*R) where mu_o is the permeability of free space, 4*pi*10^-7 Weber/(amp*meter) The force on the charge is q V B since V and B are in perpendicular directions
Sunday, October 30, 2011 at 2:45am

hvac
See if any of the following links will help you: http://search.yahoo.com/search?fr=mcafee​&p=what+is+the+effect+on+the+system+when​+gas+is+trapped+in+a+reciprocating+pisto​n+compressor%27s+clearance+space%3F Sra
Sunday, October 30, 2011 at 2:19am

hvac
gas trapped in a reciprocating piston compressors clearance space expands at the beginning of the suction stroke what effect does this have on the system
Saturday, October 29, 2011 at 11:25pm

chacking if i paraphrased correctly helppppppppppp
Watch spacing, as there is no space immediately after the word but there is one space after the comma: "arrested ,and fined " = arrested, and fined (Lots of those to fix) Every sentence begins with a capital letter: she = She (in the next sentence) I can already see ...
Saturday, October 29, 2011 at 10:30am

Physics
An astronaut in outer space pushes himself away from his spaceship. About how far does the astronaut go before stopping? What does the astronaut have to do to stop himself?
Friday, October 28, 2011 at 2:33pm

ART
Not knowing just what list you have and how detailed it might be, here are some questions you might ask yourself: 1. Are the lines gaphic, curved, straight, directional, horizontal, vertical, diagonal? 2. Is the shape naturalistic, geometric? 3. Is the space/size large, ...
Thursday, October 27, 2011 at 1:21pm

HW CHECK
What is the verb in the following sentence? (only one answer) 1. Many people believe that the economy is not the worst problem in America. a. Many b. believe c. is d. is not e. in What is the subject in the following sentence? (may be one or more) 2. Her problems, her ...
Wednesday, October 26, 2011 at 7:36pm

French
May I apologize, Ruth? I corrected a similar essay SO MANY TIMES, and may not have all been for you! I'm sorry if that is the case. It's just when I correct the SAME/SIMILAR thing so many times (and it has been at least 7 times), I "lose it" when I know I'...
Wednesday, October 26, 2011 at 6:31pm

literary
I'll deal with the first parts of your paper. Then you need to go through it to find similar errors and fix them. Antigone and Whale Rider These are titles of the original works. You need to create your own title. Don't use other writers' titles. In the play ...
Wednesday, October 26, 2011 at 7:32am

physics
An astronaut in her space suit has a total mass of m1 = 69.7 kg, including suit and oxygen tank. Her tether line loses its attachment to her spacecraft while she's on a spacewalk. Initially at rest with respect to her spacecraft, she throws her oxygen tank of mass m2 = 12....
Tuesday, October 25, 2011 at 11:51pm

literary
Paikea and Antigone they both have similarities in common = delete "they" = P & A both have... considered Hero’s = Heros (not possessive)... hardships (plural) and telling to Creon = delete "to" = telling Creon she is an hero = she is a hero (or ...
Tuesday, October 25, 2011 at 3:31pm

Decimal problem #2
The glass mirror of the Hubble telescope had to be repaired in space because it would not focus properly. The problem was that the mirror's outer edge had a thickness of 0.6248 cm when it was supposed to be 0.625 cm. Was the edge too thick or thin? By how much?
Monday, October 24, 2011 at 6:21pm

physics
index of refraction= speed of light in space/speed of light in material=3.0/1.75=
Monday, October 24, 2011 at 6:01pm

statistics
government data assign a single case or each death that occurs in the u.s. the data show that the probability is 0.45 that a randomly chosen death was due to cardiovascular disease, and 0.22 that i was due to cancer. Suppose a docote checked the cause of death of 2 randomly ...
Monday, October 24, 2011 at 2:12pm

c++ program
how can a modfiy this source code to a menu. #include <stdio.h> #include <stdlib.h> #include <time.h> main() { char cYesNo = '\0'; int iResp1 = 0; int iResp2 = 0; int iResp3 = 0; int iElaspedTime = 0; int iCurrentTime = 0; int iRandomNum = 0; int i1...
Monday, October 24, 2011 at 12:18pm

geography
Which statements describe cultural influences? Florida is bordered by water on three sides. French is spoken in parts of Louisiana. Forests are cleared to provide space for cattle grazing. Male children are encouraged to attend the university. The longest river on the ...
Monday, October 24, 2011 at 10:40am

Physics
Please help me with these choose the best answers since I'm not sure of my answers. A current element produces a magnetic field in the region surrounding it. at any point in space, the magnetic field produced by this current element points in a direction that is a) radial ...
Sunday, October 23, 2011 at 10:02pm

Physics
Please help me with these choose the best answers since I'm not sure of my answers. A current element produces a magnetic field in the region surrounding it. at any point in space, the magnetic field produced by this current element points in a direction that is a) radial ...
Sunday, October 23, 2011 at 9:31pm

physics
-Observations of neutrinos coming from the Sun -Measurements of the Sun’s total energy output into space
Sunday, October 23, 2011 at 5:17pm

Physics
Hi,I need help with question 1) There were twins on our planet earth. They were physicst. One of them were sent to space at his 20 year. When he comes back after 20 years of stay in the space he was 40 years but his brother who stayed on earth was 60 years old. How can it be? ...
Sunday, October 23, 2011 at 1:36am

zoology
The space between two front incisor teeth. Condoleeza Rice and David Letterman are prominent examples. It treatable with orthodontic methods or a "cap", but many choose to leave it alone.
Friday, October 21, 2011 at 8:49am

English
1. Aesthetes were very sensitive, searching for beauty; I wouldn't say they were decadent. 2) for eternal (spelling)beauty (spelling) the signs? (need a space) 3) novel, (add comma) 5) Whate'er or Whatever test; (new sentence?) try to be calm synonyms = (from the ...
Wednesday, October 19, 2011 at 11:23am

Math
A tile is 38 cm long and the space between the tiles is 0.8. How many tiles are required to build a floor 5.82 m long?
Wednesday, October 19, 2011 at 6:27am

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