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December 18, 2014

Homework Help: Science: Outer Space

Recent Homework Questions About Outer Space

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Physics
When out in space in International Space Station (ISS), Astronauts experience weightlessness. The ISS’s orbit is 354 km (that is 3.54 x 105 m) above the surface of the earth. The distance separating the center of the earth from the center of the ISS is then approximately ...
Thursday, September 8, 2011 at 8:57am

physics
If the average speed of an orbiting space shuttle is 19600 mi/h, determine the time required for it to circle the Earth. Make sure you consider the fact that the shuttle is orbiting about 200 mi above the Earth's surface, and assume that the Earth's radius is 3963 miles
Wednesday, September 7, 2011 at 11:10pm

Physics
Suppose a space capsule with an astronaut inside is launched from the top of a tower at some angle above the horizontal. a)While the capsule is in free fall, what are the acceleration of the astronaut and the capsule? b)If the astronaut measures his acceleration compared with ...
Tuesday, September 6, 2011 at 8:24pm

English
I urgently need to check this summary of a newspaper article. As I don’t know much of economy, I’d like you to check the use of words. Thank you very much. 1) Chinese economical and political influence is rising in Europe. Examples of its growth are the ownership of ...
Tuesday, September 6, 2011 at 1:14pm

Microbiology
Which of the following statements about the outer membrane of Gram-negative cell wall is FALSE? A. The outside leaflet is largely composed of lipopolysaccharides. B. The outer membrane contains porins that allow passage of molecules and ions directly into the periplasmic space...
Sunday, September 4, 2011 at 10:06pm

Velocity and Displacement
The Space Shuttle travels at a speed of about 7.60 103 m/s. The blink of an astronaut's eye lasts about 120 ms. How many football fields (length = 91.4 m) does the Shuttle cover in the blink of an eye?
Thursday, September 1, 2011 at 4:25pm

homework
ranslate the following situation into an inequality. Do not solve. “Charlie would like to pack one less outfit than Jane for their trip. Loretta would like to bring five outfits less than twice what Jane packs. Due to space in the suitcase, they are limited to a total of ...
Tuesday, August 30, 2011 at 11:01pm

math
paint express charge $30 per gallon of paint plus $1.10 per square foot of wall space. color creations charges $24 per gallon of paint plus $1.20 per square foot of wall space. robert estimates he will need four gallons of paint for the rooms he'd like painted. how much ...
Tuesday, August 30, 2011 at 4:56pm

Chemistryy
Identify the observations of Ernest Rutherford's experiment with the gold foil. Where he experimented on alpha particles and deflection. Check all that apply.... 1) a positive charge is spread equally over the atom 2) THE MAJORity of the space inside the atom is empty ...
Monday, August 29, 2011 at 12:14am

science
Newton’s law of gravity is used with great success in most everyday situations, and indeed, in planning planetary space missions such as the Rosetta probe. However, Einstein’s theory of general relativity and a theory of quantum gravity are needed to describe the ...
Sunday, August 28, 2011 at 12:03pm

space
If the diameter of a galaxy is 243.3 kpc, how many meters is that?
Tuesday, August 23, 2011 at 3:44pm

science
I HAVE WRITTEN A MITIGATION PLAN AND WANTED TO KNOW IF SOMEONE WOULD READ IT A GIVE ME FEED BACK AS TO WHAT I CAN CHANGE Energy Conservation Mitigation Plan Humans are not making energy conservation a priority. Spending a day without energy will be a hard task to do. Society ...
Saturday, August 20, 2011 at 6:32pm

physics
A 88-kg astronaut and a 1200-kg satellite are at rest relative to the space shuttle. The astronaut pushes on the satellite, giving it a speed of 0.25m/s directly away from the shuttle. Seven-and-a-half seconds later the astronaut comes into contact with the shuttle.What was ...
Saturday, August 20, 2011 at 2:12am

Child Care Managment
which of the following is is best suited to a formative assessment of progress? A, muscular strngth and endurance B body fat analysis C. Flexibility D awareness of selfand space. I think is A. But if Im wrong can somebody help me. thanks.
Friday, August 19, 2011 at 6:57pm

physics
The space shuttle has a mass of 2.0 × 106 kg. At lift-off the engines generate an upward force of 30 × 106 N. a. What is the weight of the shuttle? b. What is the acceleration of the shuttle when launched? c. The average acceleration of the shuttle during its 10 ...
Wednesday, August 17, 2011 at 10:41pm

english
You demonstrate that you are able to revise, edit, and proofread by effectively rewriting a paragraph using the standard written conventions of American English. To accomplish this assignment, you apply the rules and skills taught in the first four study units of this course. ...
Wednesday, August 17, 2011 at 1:01pm

Math
Use the 5 steps to solve this problem. Paint Express charges $30 per gallon of paint plus $1.10 per square fooet of wall space. Color Creations charges $24 per gallon of paint and $1.20 per square feet of wall space. Robert estimates he wll need 4 gallons of paint for the room...
Wednesday, August 17, 2011 at 3:14am

english
Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on e-mail, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now and then, instead of ...
Wednesday, August 17, 2011 at 1:48am

math
John must mount a box which is 12 5/8 inches wide. He wants to leave 7 1/2 inches on each side of the box. How much space across will John need?
Saturday, August 13, 2011 at 10:26pm

Algabra 1
Buying a Home For most people, buying a house is a great investment that can offer security in an uncertain world, but buying a house is also a commitment. Application Practice Answer the following questions. Use Equation Editor to write mathematical expressions and equations...
Saturday, August 13, 2011 at 9:06pm

maths
Every day, a bakery owner buys either butter(B) or ghee(G).The type of item purchased in consecutive days is to be recorded.List the sample space.If a different type of item is purchased than in the previous day, we say that there is a switch.Let X denote the number of ...
Saturday, August 13, 2011 at 5:23am

PHYSICS
A hollow brass cylinder is weighed on a pan balance (kitchen scale) which read in kg. The scale reading is 5.56 kg. The brass cylinder is now removed from the scale and is replaced by a beaker of liquid density 1.56 * 10^3 kg/m^3; the scale now reads 17.50 kg. The brass ...
Wednesday, August 10, 2011 at 6:11pm

Physics _ Please please help
A hollow brass cylinder is weighed on a pan balance (kitchen scale) which read in kg. The scale reading is 5.56 kg. The brass cylinder is now removed from the scale and is replaced by a beaker of liquid density 1.56 * 10^3 kg/m^3; the scale now reads 17.50 kg. The brass ...
Tuesday, August 9, 2011 at 11:12pm

History
Can some one help me with these questions? Because Japan was hit by the worldwide economic depression in the 1930s, military leaders were able to gain power. Question 1 answers True False Question 2 text Question 2 After Japan withdrew from the League of Nations they aligned ...
Tuesday, August 9, 2011 at 7:20pm

Physics
Two objects x and y with a total mass od 2.5 x 10^3 kg are joined together in outer space and are at rest. An astronaut in a space shuttle presses a button that is explosive and seperates the two objects from each other. X moves to the right with a velocity of 4.8 m/s and Y ...
Monday, August 8, 2011 at 7:19pm

math
A building has 7 storeys. If the interior length is 41 m and the width is 32 m, What is the total floor space in the building including open spaces for stairs, etc?
Wednesday, August 3, 2011 at 5:59am

physics
A space probe of mass M is moving with uniform velocity v far from earth and from other massive bodies,and it is planned to deflect from its trajectory through an angle theta by firing from it a suitable mass at velocity v.Derive an expression for the suitable mass m
Tuesday, August 2, 2011 at 8:56am

Math
A mini license plate for a toy car must consist of two numbers followed by a letter. Each number must be a 5, 7 or 9. Each letter must be a C, A or N. Repetition of digits is NOT permitted. Use the counting principle to determine the number of points in the sample space. ...
Friday, July 29, 2011 at 6:44pm

hardware
What percentage of the address space of IP4 do the network classes of A, B, and C represent? ( Hint: Think of the classes in terms of power of 2.)
Friday, July 29, 2011 at 6:35pm

Math
Math help please? Eric, Jose, Shannon, and Jackie wanted to plant a garden. Jose’s dad said they could use a rectangular space in the backyard that was 8 m by 4 m. The friends decided they would first like to make a colorful border for the garden using small flowering ...
Thursday, July 28, 2011 at 7:52pm

MATH-SO LOST :(
A mini license plate for a toy car must consist of a number followed by two letters. Each letter must be a C, A or R. Each number must be a 3 or 7. Repetition of letters is permitted. Use the counting principle to determine the number of points in the sample space. Construct a...
Tuesday, July 26, 2011 at 8:38pm

chemistry
The space shuttle environment control system handles excess CO2 (it is 4.0% by mass of exhaled air) by reacting it with lithium hydroxide, LiOH, pellets to form lithium carbonate,Li2CO3, and water. If there are 7 astronauts on board and each exhales 20. L of air per minute, ...
Tuesday, July 26, 2011 at 12:08am

science
Question: If you have an electric motor on a bench and hook it to the power the shaft turns. If you put the shaft in a vise the casing of the motor will turn. Now:...put this motor in free space no gravity and attach a battery for power..when the power is turned on will the ...
Monday, July 25, 2011 at 9:43pm

english
Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on e-mail, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now and then, instead of ...
Friday, July 22, 2011 at 1:04am

english
Pretend that you writing to the editor of your local newspaper. Your purpose is to convince its readers that rather than solely relying on e-mail, people should mail a letter to their loved ones every now and then. Following is your first draft. Every now and then, instead of ...
Friday, July 22, 2011 at 1:04am

Chem
I have a chemistry test that I need help with. My answers have stars by them Can someone please help me with the answers to this test??? Part 1 – Matter as Energy & Structure 1. When a pair of electrons is shared between two atoms, a covalent bond is said to have formed...
Wednesday, July 20, 2011 at 1:52pm

physics
what causes an object to experience an artificial gravitational acceleration in a rotating space station
Wednesday, July 20, 2011 at 12:34pm

production and operations Management
Selling for $5 each, programs are a tricky business. Under substantial pressure from Wisner, Maddux knows he has to ensure that costs are held to a minimum and contribution to the new expansion maximized. As a result, Maddux wants the programs for each game to be purchased ...
Tuesday, July 19, 2011 at 9:50pm

Phys Science
Good afternoon tutors..I need help on a few problems.Im really stuck.. 1) the space shuttle orbits at an altitude of approximately 200km above the surface of the earth. If the radius of the earth itself is 6380km, whats the acceleration de to gravity at the altitude of the ...
Tuesday, July 19, 2011 at 4:33pm

phys sci
the space shuttle orbits at an altitude of approximately 200 km above the surface of the earth. If the radius of the earth itself is 6380km, what is the acceleration due to gravity at the altitude ofthe space shuttle?
Tuesday, July 19, 2011 at 2:09pm

phys science
A space shuttle orbits at an altitude of approximately 200km above the surface of the Earth. If the radius of the Earth itself is 6380 km, what’s the acceleration due to gravity at the altitude of the space shuttle?
Monday, July 18, 2011 at 10:53pm

math
A company is planning to purchase and store two items, gadgets and widgets. Each gadget costs $2.00 and occupies 2 square meters of floor space; each widget costs $3.00 and occupies 1 square meter of floor space. $1,200 is available for purchasing these items and 800 square ...
Monday, July 18, 2011 at 4:07am

programming
How do i read in a vector of integers with a space inbetween (i.e. 0 1 2 3) and make it an integer array? in java
Saturday, July 16, 2011 at 3:46pm

space
What is the role of chemistry in outer space exploration?
Thursday, July 14, 2011 at 3:50pm

Java Programming
Don't know how to start.. Can anyone help me? For this program you are to create a two class application - a driver and a principal class - that reads in text interactively from the keyboard, and then reports on two aspects of the entered text. First it should print a ...
Wednesday, July 13, 2011 at 3:51am

physics
A space vehicle accelerates uniformly from 70 at t = 0 to 172 at t = 10.0. How far did it move between = 2.0 and = 6.0 ? So I used the forumla d=vt+.5a(t)^2 but for a i got 10.2 since a=(172-70)/10 Now im stuck for v, what do i put for v?
Sunday, July 10, 2011 at 8:41pm

physics
A space vehicle accelerates uniformly from 70 at t = 0 to 172 at t = 10.0. How far did it move between = 2.0 and = 6.0 ? So I used the forumla d=vt+.5a(t)^2 but for a i got 10.2 since a=(172-70)/10 Now im stuck for v, what do i put for v?
Sunday, July 10, 2011 at 8:40pm

physics
A space vehicle accelerates uniformly from 50m/s at t=0 to 182m/s at t=1 0.0s. How far did it move between t=2.0s and t=6.0s?
Sunday, July 10, 2011 at 4:08am

linear programming
A company is planning to purchase and store two items, gadgets and widgets. Each gadget costs $2.00 and occupies 2 square meters of floor space; each widget costs $3.00 and occupies 1 square meter of floor space. $1,200 is available for purchasing these items and 800 square ...
Friday, July 8, 2011 at 2:52pm

physics
A space shuttle is launched from rest. It takes 8.00 to reach 155 km/s, and at the end of the first 1.00 km/s its speed is 1550 . What is the average acceleration (in m/s) of the shuttle during the first 8.00 s?
Friday, July 8, 2011 at 1:37am

English
I forgot to include the following few sentences. Thank you. 1) Virginia Woolf abandoned the traditional technique of novel writing for a new, more modern form. 2) What did she turn to? She turned into an interior monologue* . In her need to shift back and forth in time and ...
Wednesday, July 6, 2011 at 6:25pm

chem
The average distance between planet X and Earth is about 1.5 x 10^8 miles. How long (minutes would it take pictures transmitted from a space vehicle on Planet X's surface to reach Earth?
Saturday, July 2, 2011 at 3:32pm

Physics
In a simulation on earth, an astronaut in his space suit climbs up a vertical ladder. On the moon, the same astronaut makes the same climb. In which case does the gravitational potential energy of the astronaut change by a greater amount?
Thursday, June 30, 2011 at 10:24pm

physics
A satellite explodes in outer space, far from any other body, sending thousands of pieces in all directions. How does the linear momentum of the satellite before the explosion compare with the total linear momentum of all the pieces after the explosion?
Tuesday, June 28, 2011 at 8:13pm

early childhood development
the basis of a good child guidance system is the caregiver's (a)arrangement of space in the facility (b)kknowledge of child development (c)choice of equipment (d)schedule of activities i put b
Monday, June 27, 2011 at 1:03pm

science
an area of space with gravity so strong that it traps light (two words) it has 9 letter in it
Wednesday, June 22, 2011 at 6:07pm

science
a body that revolves around another body in space. it has 9 letters
Wednesday, June 22, 2011 at 5:25pm

science
the space telescope was named for this American astronmer it has 6 letters
Wednesday, June 22, 2011 at 5:16pm

science
the russian name given to a person who travels into space it is a 9 letter word
Wednesday, June 22, 2011 at 5:08pm

early childhood education
which one of these factors is most likely to determine the total number of children you can take into your facility (a)physical space available (b)childreds need (c)staff members skills (d)program philosophy
Wednesday, June 22, 2011 at 2:26pm

chemistry
space probe Pioneer 11 was lanced April 5, 1973, and reached Jupiter in Dec.1974 traveling a distance of 998 km. How long did it take an electromagnetic signal to travel to earth from pioneer 11 when it was near jupiter?
Monday, June 20, 2011 at 6:13pm

Poetry
Decide which word from the word bank belongs in each blank in the statements that follow. bland / contaminated / devastated / punitive / transcend / concretely / convey / procrastinating / spontaneous / uniqueness 1. Even though I know doesn't pay, I still put off until ...
Monday, June 20, 2011 at 4:08am

LA- Grade 9
"Something invisible, seeking shelter from the cruel and pitiless vacuum of space." Is an example of: a. metaphor b. personification c. symbolism d. hyperbole Your help is much appreciated !!
Friday, June 17, 2011 at 9:17am

reading
Examine the evidence of the Earth's shape. The sharp horizon at first suggests a flat Earth with an edge. But as you walk toward the horizon, the "edge" recedes ahead of you, implying that the Earth's surface is curved. Look also at a ship sailing out to sea...
Tuesday, June 14, 2011 at 1:09pm

Math
A space shuttle is spotted flying at an angle of elevation of 17° when sighted from Cape Canaveral. At the moment it is sighted, it is directly overhead a ship located 12 mi from the Cape. The height of the shuttle at this moment is approximately a)3.5 b)3.7 c)2.8 d)4.1
Sunday, June 12, 2011 at 9:35pm

Physics
A single photon in empty space is converted into an positron and an electron, each with rest mass 511Mev. (a) show this transformation is not possible (dynamaically). (b)How could this transformation be made posible. (c)what is the minimum photon energy required to enable the ...
Sunday, June 12, 2011 at 6:44pm

math
a liscence plate for a car must consist of a letter followed by two numbers. Each letter mus be an R, U or N. Each number must be a 2 or 6. Repetition of digits is permitted. Use the counting principle to determine the number of points in the sample. Construct a tree diagram. ...
Sunday, June 12, 2011 at 12:18pm

Translate the following situation into an inequali
“Charlie would like to pack one less outfit than Jane for their trip. Loretta would like to bring five outfits less than twice what Jane packs. Due to space in the suitcase, they are limited to a total of 24 outfits. How many outfits can they each pack?”
Saturday, June 11, 2011 at 3:34am

“Charlie would like to pack one less outfit than J
“Charlie would like to pack one less outfit than Jane for their trip. Loretta would like to bring five outfits less than twice what Jane packs. Due to space in the suitcase, they are limited to a total of 24 outfits. How many outfits can they each pack?”
Saturday, June 11, 2011 at 3:34am

physics
The average speed of an orbiting space shuttle is 20100 mi/h. The shuttle is orbiting about 196 mi above the Earth’s surface. Assume the Earth’s radius is 3963 mi. How long does it take to circle the Earth? Answer in units of h ( hours)
Saturday, June 11, 2011 at 1:50am

Physics
If a cylindrical space station 300 {\rm m} in diameter is to spin about its central axis, at how many revolutions per minute ({\rm rpm}) must it turn so that the outermost points have an acceleration equal to g?
Friday, June 10, 2011 at 11:36pm

Instructional materials:Their preparation and Use
if you could help please do 3. A document camera is more versatile than an opaque projector because you can use it to A. record sound. B. project three-dimensional objects. C. display book pages on a screen. D. view colored items. 4. Which one of the following guidelines ...
Thursday, June 9, 2011 at 9:23pm

Geometry
A box is filled with 6 cans of tennis balls. If the emply space was filled with sand, how much sand is needed to fill the box? Each can has a radius of 2 in. Height of box is 12in.
Thursday, June 9, 2011 at 1:51am

physics (special relativity)
A single photon in empty space is transformed into an electron and a positron, each with rest mass m(e). (a) show that the folowing process is dynamically impossible. (b) Explain in detail how this process can be made possible (c) for part b what would be the minimum photon ...
Wednesday, June 8, 2011 at 2:44pm

geometry
A box is filled with 6 cans of tennis balls. If the empty space was filled with sand, how much sand will be needed to fill the box? Each can of tennis balls has a radius of 2 in. Height of box is 12in.
Wednesday, June 8, 2011 at 10:00am

Chemistry
Any object, be it a space satellite or a molecule, must attain an initial upward velocity of at least 11.2 km/s in order to escape the gravitational attraction of the earth. What would be the kinetic energy in joules of a satellite weighing 2337 lb that has the speed equal to ...
Wednesday, June 8, 2011 at 12:39am

daycare
You've decided to operate a day care home. Which one of the following factors is the most important in helping you make your decision? A. Your family is willing to share their living space with the children in the program. B. Your home seems to be large enough. C. You find...
Tuesday, June 7, 2011 at 10:14pm

physics
Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is whisked away in a space ship at 90% of the speed of light. After 65 years they are reunited. Will they look the same? I know that the twin that was ...
Tuesday, June 7, 2011 at 9:06pm

relativity
Show that the following process is dynamically inpossible: A single photon in empty space is transformed into an electron and a positron, each with rest mass m(e).Explain in detail, How can this this process be made possible? In this case, what is the minimum photon energy ...
Tuesday, June 7, 2011 at 2:35pm

Chmistry
Any object, be it a space satellite or a molecule, must attain an initial upward velocity of at least 11.2 km/s in order to escape the gravitational attraction of the earth. What would be the kinetic energy in joules of a satellite weighing 2337 lb that has the speed equal to ...
Tuesday, June 7, 2011 at 8:20am

math
how do you explain this questionA mini license plate for a toy car must consist of a letter followed by two numbers. Each letter must be a T, O or Y. Each number must be a 4 or 6. Repetition of digits is permitted. Use the counting principle to determine the number of points ...
Sunday, June 5, 2011 at 10:41pm

n/a
Inter-department Services Step Method : O'brain's Department Store Allocates the Cost of personnel and Payroll to three retail Sales Department Housewares , Clothing and Furniture . In addition to providing services to the operating department. Personnel and Payroll ...
Saturday, June 4, 2011 at 4:26pm

physics
In outer space two identical space modules are joined together by a 500.0 massless cable. These modules are rotating about their center of mass. In each module, the cable is connected to a motor,so that the modules can pull each other together. The initial tangential speed of ...
Thursday, June 2, 2011 at 11:00pm

english
I am stuck with being able to complete this assignment and I was wondering if some1 could help me with it. I don't (can't) fail this 1. I already completed my english assignment but I totally bombed it and they want me 2 complete this assignment 2 b able 2 pass. ...
Wednesday, June 1, 2011 at 7:21pm

physics
An 80.9 kg astronaut is taking a space walk to work on the engines of his ship, which is drifting through space with a constant velocity. The astronaut, wishing to get a better view of the Universe, pushes against the ship and much later finds himself 30.3 m behind the ship. ...
Tuesday, May 31, 2011 at 4:09pm

space
A water tower has to be equidistant from three communities. The communities are at positions (-25, 20), (-5, -40) and (15, 30). Find the coordinates of the point where the water tower should be built.
Monday, May 30, 2011 at 10:19am

History checkpoint
From the list provided below, you must decide if each item was an initiative only within Kennedy’s New Frontier, if it was proposed by both presidents, or if it was an initiative only within Johnson’s Great Society. For each numbered item, place an “X” in ...
Friday, May 27, 2011 at 12:04am

English
Could you please check these sentences,please? It's really urgent. I made some changes and I would like to know if they are correct. 1) The interior monologue has the following features. First, it is immediate since it lacks the conventional syntax and it is free from ...
Wednesday, May 25, 2011 at 6:18pm

english
what a business man need to know about nigeria concepts of personal space and rules of social behaviour in order to conduct business successfully in that country
Saturday, May 21, 2011 at 12:18pm

Physics
Which of the following are not transverse waves? a) Wind (Airy) waves on the ocean. b) Water ripples in a small pool. c) Microwaves inside a microwave oven. d) Vibrations travelling on the string of a guitar. e) Radio waves travelling through space. f) Vibrations travelling on...
Wednesday, May 18, 2011 at 9:04pm

math
what is the amount of space, in cubic units, occupied by a three-dimensional object?
Wednesday, May 18, 2011 at 8:36pm

English
Thank you very much. Could you check these sentences about the interior monologue. 1) The American psychologist William James coined the phrase “stream of consciousness” to define the continuous flow of thoughts and sensations that characterize the human mind. 2) The...
Wednesday, May 18, 2011 at 7:00pm

Physics
An astronaut takes a space trip to newly discovered palnet X. measurements from earth indicate that: Mx=3Me and Rx=2Re. What is the acceleration of gracity gx on this planet as a multiple of ge?
Wednesday, May 18, 2011 at 11:17am

Geometry
how many planes can be passed through two points in space? and is there exactly one plane containing two nonparallel lines?
Sunday, May 15, 2011 at 6:42pm

Algebra- word problem
Jordan has a photograph on his wall that is 3 in. long and 6 in. wide. He takes it to be framed which increases the length and width by 2 in. each. How does getting the picture framed change the amount of wall space needed? My choice is B- Correct?? Choices A. the wall needed ...
Sunday, May 15, 2011 at 8:14am

Math
Suppose it takes 3 days for a space vehicle to travel from the earth to the moon. About how long would it take the same vehicle traveling at the same speed to Venus? Moon= 240,000mi Venus=26,000,000mi Round to the nearest whole number. Use scientific notation. I know it is 325...
Friday, May 13, 2011 at 10:19pm

Grammar
Choose the best answer: 1. (You're, Your) sister-in-law's car is parked in (its, it's)space. Answer: Your sister-in-law's car is parked in its space. 2. Four patients (was, were) sutured with 3-0 silk, and (its, it's) their responsibility to return for (...
Friday, May 13, 2011 at 5:45pm

Astronomy
In what ways do Earth and the moon move through space? How do these motions produce such phenomena as day and night, the seasons, phases of the moon, and eclipse?
Thursday, May 12, 2011 at 11:56pm

Physics
The space shuttle is in a 150km-high circular orbit. It needs to reach a 560km-high circular orbit to catch the Hubble Space Telescope for repairs. The shuttle's mass is 7.00×10^4kg. How much energy is required to boost it to the new orbit? In the original orbit, I ...
Wednesday, May 11, 2011 at 5:09pm

Math
An observer 2.5 miles from the launch pad of a space shuttle measures the angle of elevation to the base of the shuttle to be 25 degrees soon after lift off. How high is the shuttle at that instant? (Assume that the shuttle is still moving vertically)
Tuesday, May 10, 2011 at 4:20pm

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