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April 1, 2015

April 1, 2015

**Recent Homework Questions About Outer Space**

Post a New Question | Current Questions

**Astronomy Grade 9**

What hazards do humans face when they are in space and what technologies have been developed in response to these hazards?
*Thursday, November 29, 2012 at 11:03pm*

**Physics, Please Help**

A 2130-kg space station orbits Earth at an altitude of 455 km. Find the magnitude of the force with which the space station attracts Earth. The mass and mean radius of Earth are 5.98 × 1024 kg and 6370 km, respectively.
*Thursday, November 29, 2012 at 10:56pm*

**space**

i need help.i need info about if the sun gives the same amount of lite to both sides of the world.HELP ITS TOMMORROW
*Thursday, November 29, 2012 at 9:10pm*

**account**

Assume it is Monday, May 1, the first business day of the month, and you have just been hired? Assume it is Monday, May 1, the first business day of the month, and you have just been hired? Assume it is Monday, May 1, the first business day of the month, and you have just been...
*Wednesday, November 28, 2012 at 7:00pm*

**earth space**

What man made or natural features can interfere with the weather radar?
*Wednesday, November 28, 2012 at 5:10pm*

**painting**

a gallon of paint will cover about 350 square feet of space. You are painting 3 halls of a school. Ignoring the doors, the halls are 10 feet tall and 125 feet long. You buy 11 gallons of paint. Did you buy enough of paint?
*Wednesday, November 28, 2012 at 10:46am*

**Physics**

A rocket of total mass 3100 is traveling in outer space with a velocity of 120 . To alter its course by 40.0, its rockets can be fired briefly in a direction perpendicular to its original motion.
*Tuesday, November 27, 2012 at 3:59pm*

**calculus**

3 letters are chosen at random from the letters P, A, N, S, O, L. What is the size of the sample space of this experiment? 12 10 20 30 35
*Tuesday, November 27, 2012 at 10:20am*

**physics**

An astronaut throws a wrench in interstellar space. How much force is required to keep the wrench moving continuously with constant velocity? Select one of the options below as your answer: A. a force equal to its weight on Earth B. a force equal to zero C. a force equal to ...
*Tuesday, November 27, 2012 at 10:08am*

**Physics Please Help ASAP**

Suppose the space shuttle is in orbit 390 km from the Earth's surface, and circles the Earth about once every 92.4 minutes. Find the centripetal acceleration of the space shuttle in its orbit. Express your answer in terms of g, the gravitational acceleration at the Earth&#...
*Monday, November 26, 2012 at 11:43pm*

**physics**

During winter break, the police department in your hometown asks you to consult in the investigation of a traffic accident that occurred in a large parking lot. It seems that a car was backing out of a parking space when a pickup truck plowed straight into it from behind. The ...
*Monday, November 26, 2012 at 11:36pm*

**Physics ASAP**

Suppose the space shuttle is in orbit 390 km from the Earth's surface, and circles the Earth about once every 92.4 minutes. Find the centripetal acceleration of the space shuttle in its orbit. Express your answer in terms of g, the gravitational acceleration at the Earth&#...
*Monday, November 26, 2012 at 10:47pm*

**stats math**

Suppose that two cards are randomly selected from a standard 52-card deck. What is the probability that the first card is a spade and the second card is a space if the sampling is done without replacement?
*Monday, November 26, 2012 at 10:47pm*

**algebra**

You are planning an ornamental garden that has a total area of 200 square feet. There are two sizes of ornamental plants you have chosen for your garden. Each small plant requires 2.5 square feet of space and each large plant requires 8 square feet of space. This situation can...
*Monday, November 26, 2012 at 6:41pm*

**Earth-Space Science**

what factors might affect the length of the rays after an impact?
*Monday, November 19, 2012 at 10:17pm*

**Physics**

An unfortunate astronaut loses his grip during a spacewalk and finds himself floating away from the space station, carrying only a rope and a bag of tools. First he tries to throw a rope to his fellow astronaut, but the rope is too short. In a last ditch effort, the astronaut ...
*Monday, November 19, 2012 at 3:26pm*

**physics**

A crate with a mass of 110 kg glides through a space station with a speed of 2 m/s. An astronaut speeds it up by pushing on it from behind with a force of 240 N, continually pushing with this force through a distance of 4 m. The astronaut moves around to the front of the crate...
*Sunday, November 18, 2012 at 10:17pm*

**Physics**

A crate with a mass of 110 kg glides through a space station with a speed of 2 m/s. An astronaut speeds it up by pushing on it from behind with a force of 240 N, continually pushing with this force through a distance of 4 m. The astronaut moves around to the front of the crate...
*Sunday, November 18, 2012 at 10:12pm*

**english**

please proofread my contrast and comparision paper Another War for the People of the United States Although the Air Force, Navy, and Army were different in the 1940's and the 200's show that, even though technology and communication have improved, conflicts between ...
*Sunday, November 18, 2012 at 9:54pm*

**math**

One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It has been determined ...
*Sunday, November 18, 2012 at 12:19pm*

**Physics**

Evaluate the following as true or false. If the Earth shrank in size, but all other factors remained the same, all of its satellites, including the Moon, would fly off into space. a) True b) False
*Sunday, November 18, 2012 at 9:53am*

**math**

One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It has been determined ...
*Saturday, November 17, 2012 at 3:01pm*

**posibility **

One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It has been determined ...
*Saturday, November 17, 2012 at 9:13am*

**math**

One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It has been determined ...
*Saturday, November 17, 2012 at 8:41am*

**8th Grade math - Ms. Sue please**

An archaeologist has set up a dig at a newly discovered site. She and her team start excavating an area that is 36 feet by 24 feet. Because the scientists find many artifacts near the edges of this area, they decide to expand the dig. They add nine feet in all directions to ...
*Friday, November 16, 2012 at 9:45pm*

**posibility**

One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It has been determined ...
*Friday, November 16, 2012 at 8:35pm*

**math**

One problem encountered by developers of the space shuttle program is air pollution in the area surronding the launch site. Acertain direction from the launch site is considered critical in terms of hydrogen chloride pollution from the exhaust cloud. It has been determined ...
*Thursday, November 15, 2012 at 8:46pm*

**statistics**

Which of the following is NOT true with respect to the properties of probability? 0 < x < 1 P(S) = 1, where S is the sample space P(A) + P(Ac) = 0 If two events are independent then P(A and B) = P(A) * P(B)
*Thursday, November 15, 2012 at 10:27am*

**physics**

It has been suggested that rotating cylinders about 12 mi long and 4.1 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?
*Wednesday, November 14, 2012 at 10:48pm*

**Calculus**

A wire 4 meters long is cut into two pieces. One piece is bent into a square for a frame for a stained glass ornament, while the other piece is bent into a circle for a TV antenna. To reduce storage space, where should the wire be cut to minimize the total area of both figures...
*Wednesday, November 14, 2012 at 7:44pm*

**Physics**

Two astronauts, each having a mass M are connected by a length of rope of length d have a negligible mass. They are isolated in space, orbiting their center of mass at an angular speed of ù0. By pulling on the rope, one of the astronauts shortens the total distance ...
*Wednesday, November 14, 2012 at 7:01pm*

**physics HELPP!!!!!!!**

Two astronaut, as shown in the figure, each having a mass of 88.0 kg, are connected by a 10.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 6.00 m/s. By pulling on the rope, the astronauts shorten...
*Wednesday, November 14, 2012 at 4:44pm*

**statistics**

Which of the following is NOT true with respect to the properties of probability? 0 < x < 1 P(S) = 1, where S is the sample space P(A) + P(Ac) = 0 If two events are independent then P(A and B) = P(A) * P(B)
*Wednesday, November 14, 2012 at 1:03pm*

**earth**

HELP? Two students are given cubic boxes, measuring 10 cm on a side. Robert puts a single glass marble with a diameter of 10 cm in the box. Susan puts 1,000 1-cm glass marbles in her box. 1.Whose box has more empty space? Explain. 2.Whose box will be heavier? Explain. Can you ...
*Wednesday, November 14, 2012 at 12:24pm*

**statistics**

Which of the following defines the probability of an event A, or P(A)? The probability of A equals 0.50. The probability of A equals the number of possible outcomes in the sample space divided by the number of outcomes favorable to A. The probability of A equals the number of ...
*Wednesday, November 14, 2012 at 10:09am*

**Physics**

An astronaut in his space suit and with a propulsion unit (empty of its gas propellant) strapped to his back has a mass of 146 kg. The astronaut begins a space walk at rest, with a completely filled propulsion unit. During the space walk, the unit ejects some gas with a ...
*Tuesday, November 13, 2012 at 3:52pm*

**physics**

Two parallel plate capacitors are identical, except that one of them is empty and the other contains a material with a dielectric constant of 4.2 in the space between the plates. The empty capacitor is connected between the terminals of an ac generator that has a fixed ...
*Tuesday, November 13, 2012 at 1:33pm*

**physics**

Radio waves transmitted through space at 3.00¡¿10 8 m/s by the Voyager spacecraft have a wavelength of 0.120 m. What is their frequency?
*Tuesday, November 13, 2012 at 1:29pm*

**physcis**

Two astronaut, as shown in the figure, each having a mass of 62.0 kg, are connected by a 12.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.00 m/s. Treating the astronauts as particles, calculate...
*Monday, November 12, 2012 at 3:43pm*

**physics**

Two astronaut, as shown in the figure, each having a mass of 62.0 kg, are connected by a 12.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.00 m/s. Treating the astronauts as particles, calculate...
*Sunday, November 11, 2012 at 7:48pm*

**physics**

Two astronaut, as shown in the figure, each having a mass of 62.0 kg, are connected by a 12.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.00 m/s. Treating the astronauts as particles, calculate...
*Sunday, November 11, 2012 at 7:43pm*

**Physics**

A rotating cylinder 7.95 kilometers in radius is designed to be used as a space colony. With what period must it rotate so the residents on it feel as heavy as they would on Earth?
*Sunday, November 11, 2012 at 7:35pm*

**physics**

Two astronaut, as shown in the figure, each having a mass of 62.0 kg, are connected by a 12.00 m rope of negligible mass. They are isolated in space, moving in circles around the point halfway between them at a speed of 5.00 m/s. Treating the astronauts as particles, calculate...
*Sunday, November 11, 2012 at 5:50pm*

**physics**

An astronaut in his space suit and with a propulsion unit (empty of its gas propellant) strapped to his back has a mass of 146 kg. The astronaut begins a space walk at rest, with a completely filled propulsion unit. During the space walk, the unit ejects some gas with a ...
*Sunday, November 11, 2012 at 2:22pm*

**physics**

The Earth’s radius is about 6380 km. The space shuttle is orbiting about 275.0 km above Earth’s surface. If the average speed of the space shuttle is 23500 km/h, find the time required for it to circle Earth.
*Sunday, November 11, 2012 at 12:49pm*

**physics**

A 7.00 104-kg space probe is traveling at a speed of 12000 m/s through deep space. Retrorockets are fired along the line of motion to reduce the probe's speed. The retrorockets generate a force of 4.00 105 N over a distance of 2700 km. What is the final speed of the probe?
*Sunday, November 11, 2012 at 6:42am*

**Physics**

Each of the space shuttle's main engines is fed liquid hydrogen by a high-pressure pump. Turbine blades inside the pump rotate at 595 rev/s. A point on one of the blades traces out a circle with a radius of 0.02 m as the blade rotates. (a) What is the magnitude of the ...
*Thursday, November 8, 2012 at 4:18am*

**Physics**

Suppose the surface (radius = r) of the space station in the figure is rotating at 38.6 m/s. What must be the value of r for the astronauts to weigh one-half of their earth-weight?
*Thursday, November 8, 2012 at 3:18am*

**Physics**

Suppose the surface (radius = r) of the space station in the figure is rotating at 38.6 m/s. What must be the value of r for the astronauts to weigh one-half of their earth-weight?
*Wednesday, November 7, 2012 at 11:00pm*

**physics**

A 2130-kg space station orbits Earth at an altitude of 455 km. Find the magnitude of the force with which the space station attracts Earth. The mass and mean radius of Earth are 5.98 × 1024 kg and 6370 km, respectively
*Wednesday, November 7, 2012 at 8:32pm*

**physics**

Each of the space shuttle's main engines is fed liquid hydrogen by a high-pressure pump. Turbine blades inside the pump rotate at 595 rev/s. A point on one of the blades traces out a circle with a radius of 0.02 m as the blade rotates. (a) What is the magnitude of the ...
*Wednesday, November 7, 2012 at 2:55pm*

**physics**

The National Aeronautics and Space Administration (NASA) studies the physiological effects of large accelerations on astronauts. Some of these studies use a machine known as a centrifuge. This machine consists of a long arm, to one end of which is attached a chamber in which ...
*Wednesday, November 7, 2012 at 2:35pm*

**physics**

In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotational motion is faster than ...
*Wednesday, November 7, 2012 at 2:17pm*

**Physics**

Suppose the surface (radius = r) of the space station in the figure is rotating at 38.6 m/s. What must be the value of r for the astronauts to weigh one-half of their earth-weight?
*Wednesday, November 7, 2012 at 2:13pm*

**writing**

PLEASE PROOF READ IT WILL BE DOUBLE SPACED WHEN I SUBMIT IT. In approximately 200–350 words, using compare/contrast strategies, discuss the benefits and/or advantages of shopping online, rather than shopping in a store. The Benefits of Online Shopping Rather Than ...
*Sunday, November 4, 2012 at 7:44pm*

**Capacitance (tricky)**

Two parallel plates of area 41 cm.^2 have equal but opposite charges of 2.60E-07 C. Within the dielectric material filling the space between the plates, the electric field is 5.80E+05 V./m. Find the dielectric constant of the material. Feel like there is a huge lack of ...
*Saturday, November 3, 2012 at 1:18am*

**AP Physics B**

A gadget of mass 17.85 kg ﬂoats in space without motion. Because of some internal malfunction, the gadget violently breaks up into 3 fragments ﬂying away from each other. The ﬁrst fragment has mass m1 = 4.12 kg and speed v1 = 3.57 m/s while the second ...
*Thursday, November 1, 2012 at 6:34pm*

**Physics **

A space station shaped like a giant wheel has a radius 105 m and a moment of inertia of 5.09 108 kg · m2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1g. When 100 people move to the center of the ...
*Thursday, November 1, 2012 at 1:30pm*

**Physics**

When we lauch a space shuttle will it go with Earths rotationor would it go opposite?
*Wednesday, October 31, 2012 at 10:03pm*

**PHYSICS**

A space station shaped like a giant wheel has a radius 105 m and a moment of inertia of 5.09 108 kg · m2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1g. When 100 people move to the center of the ...
*Wednesday, October 31, 2012 at 3:37pm*

**Intro to physics**

A space station shaped like a giant wheel has a radius 105 m and a moment of inertia of 5.09 108 kg · m2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1g. When 100 people move to the center of the ...
*Wednesday, October 31, 2012 at 12:10pm*

**physics**

The space probe Deep Space I was launched on October 24, 1998. It's mass was 474 kg. The goal of the mission was to test a new kind of engine called an ion propulsion drive. This engine generated only a weak thrust, but it could do so over long periods of time with the ...
*Tuesday, October 30, 2012 at 1:35am*

**comp.sci-python**

For this option, first ask the user what the maximum number of columns for printing will be. ("How wide should the output be?") Next, the user will enter in a paragraph of text. They may enter it in as many lines as they'd like, and the only way you know they are...
*Monday, October 29, 2012 at 11:03pm*

**computer science**

Python 3 For this option, you will first ask "how many rows?", and get a positive integer from them. Next, you will ask "how many columns?", and get another positive integer from them. The next step is to ask for an alignment of each column. They will enter...
*Monday, October 29, 2012 at 11:00pm*

**Statistics**

A university has an exclusive agreement with the coffee chain Monobeans. Several students and faculty complained about their lack of baked goods. Looking for a better provider of carbs and caffiene, the university management rents out for one trial semester a space within a ...
*Monday, October 29, 2012 at 3:57pm*

**phyicis**

Homer Hickham and his buddies launched model rockets in the late 1950's when the US was trying to get a rocket into space. If homer launches a rocket from rest and its engine delivers a constance acceleration of 8.2 m/s^2 for 5.0seconds after which the fuel is used up by ...
*Monday, October 29, 2012 at 1:18pm*

**Statistics**

A university has an exclusive agreement with the coffee chain Monobeans. Several students and faculty complained about their lack of baked goods. Looking for a better provider of carbs and caffiene, the university management rents out for one trial semester a space within a ...
*Sunday, October 28, 2012 at 2:54pm*

**science **

What property of gases allow them to completely fill whatever space they are in?
*Wednesday, October 24, 2012 at 9:15pm*

**information literacy**

1. which article title represents a citation under the news results? A)priceton paleontologist produces evidence for new theory on dinosaurs extinction B)chunk of death dealing with astroid found C)second crater points to killer comets D)extinctions tied to impact from space
*Wednesday, October 24, 2012 at 6:17pm*

**c++**

Distance between two 3-D points. Given two points in space (3-dimensional), find the distance between them. The user will input the coordinates (x,y,z) of the two points and your program will calculate and display the distance between the points.
*Wednesday, October 24, 2012 at 4:09pm*

**physics college**

A rocket booster fires in space with a force of 500N and moves the 10kg satellite from rest to motion in 2.1 seconds. Find the acceleration? What is the final speed of the satellite?
*Tuesday, October 23, 2012 at 11:30pm*

**physics**

You are explaining to a friend why the crew of the International Space Station feels weightless while orbiting the Earth. Your friend responds that he thought gravity was just a lot weaker up there. Show that it isn’t so by calculating the acceleration due to gravity 350 ...
*Tuesday, October 23, 2012 at 10:45pm*

**Science Fair**

Hi, my question is are part 1,2, and 3 different ways you can do the project? There are three parts. Each part should take less than 1 hour. In Part 1, you will stare at a colored object for various amounts of time, then measure how long it takes for the afterimage to ...
*Tuesday, October 23, 2012 at 6:21pm*

**Physics**

In a science fiction novel two enemies, Bonzo and Ender, are fighting in outer space. From stationary positions they push against each other. Bonzo flies off with a velocity of +1.7 m/s, while Ender recoils with a velocity of −2.7 m/s. (b) Determine the ratio mBonzo/...
*Monday, October 22, 2012 at 7:29pm*

**algebra**

can anyone please help me set this problem up, I can do the math but I have tried for hours... Air fare club offers membership at $300.00, at least 50 people must join.For every member over 50 their fare will be reduced by $2 for every member. Due to space limits only 125 ...
*Monday, October 22, 2012 at 1:59pm*

**math**

air fare club offers membership at $300.00, at least 50 people must join.For every member over 50 their fare will be reduced by $2 for every member. Due to space limits only 125 passengers will be allowed. how many memberships will maximize the revenue?
*Monday, October 22, 2012 at 1:11pm*

**calculus**

A health club offers memberships at the rate of $300, provided that at least 50 people join. For each member in excess of 50, the membership fee will be reduced by $2 for all members. Due to space limitations, at most 125 memberships will be sold. How many membersips should ...
*Monday, October 22, 2012 at 11:15am*

**Math**

Radius of earth 3,959 miles Space shuttle orbits 200 miles above earths Surface Space shuttle completes 220 degrees of a Revolution around earth in one day What is the average speed of the space Shuttle
*Sunday, October 21, 2012 at 5:22pm*

**Math**

Radius of earth 3,959 miles Space shuttle orbits 200 miles above earths Surface Space shuttle completes 220 degrees of a Revolution around earth in one day What is the average speed of the space Shuttle
*Sunday, October 21, 2012 at 4:52pm*

**Physics**

On earth, two parts of a space probe weigh 18300 N and 4440 N. These parts are separated by a center-to-center distance of 5.11 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the other out in space, far...
*Friday, October 19, 2012 at 5:00pm*

**Physics**

Calculate a space shuttle territory 250 km above Earth's surface. Earth's mass is 6.0 * 10^24kg and its radius is 6.38 * 10^6 m (6380km)
*Thursday, October 18, 2012 at 12:57pm*

**math**

A group medical practice has 40,000 patients. Charts vary in thickness from 1/4 to 1 inch thick. The average of all charts is 1/2 inch thick. Using the average 1/2 inch thickness, how many inches of shelf space will be required for 40,000 charts?
*Tuesday, October 16, 2012 at 11:36pm*

**science**

Also is did cassini send out a space probe or satellite?
*Tuesday, October 16, 2012 at 6:54pm*

**Physics**

An asteroid with mass m = 1.85*10^9 kg comes from deep space, effectively from infinity, and falls toward Earth. How much work would have to be done on the asteroid by friction to slow it to 550 m/s by the time it reached a distance of 1.50*10^8 m from Earth?
*Tuesday, October 16, 2012 at 6:34pm*

**Math**

24 (6-)-1 divided by-5. There is a big space between the 24 and the -6. I don't know if I multiply 24x-6 or do I multiplying-6x-1and then times it by 24. Please help
*Tuesday, October 16, 2012 at 11:17am*

**math**

The question is 24 (-6)-1/-5 I don't understand what you do with the 24. I got -145/-5=29 I multiplied 24 by -6 but I don't think this is right there is a big space between the 24 and the other numbers.
*Friday, October 12, 2012 at 12:01pm*

**Communication**

Which of the following is NOT a technique for emphasizing material in a resume? A. Presenting it in vertical lists B. Including it as part of a lengthy paragraph C. Offsetting it with white space D. Positioning it as the top of a page
*Monday, October 8, 2012 at 7:56pm*

**Science**

How many minutes are required for a radio signal to travel from Earth to a space station on Mars if Mare is 7.83 x 10 to the 7th power km?
*Monday, October 8, 2012 at 2:03am*

**Physics**

To create artificial gravity, the space station shown in the drawing is rotating at a rate of 1.60 rpm. The radii of the cylindrically shaped chambers have the ratio rA/rB = 3.00. Each chamber A simulates an acceleration due to gravity of 9.60 m/s2. Find values for (a) rA, (b...
*Saturday, October 6, 2012 at 11:32pm*

**PLEASE read over essay**

I did this for chemistry. Are the examples and grammer correct? THANK YOU SO MUCH TO WHOEVER ACTUALLY TAKES THE TIME TO READ THIS I LOVE YOU OMG. Naming Chemical Compounds By: Bryce R The periodic table is made up of the most simplest and complex elements. These elements ...
*Thursday, October 4, 2012 at 10:45pm*

**physics**

A space traveler weighs 635 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth?
*Thursday, October 4, 2012 at 1:03am*

**physics**

The Hubble Space Telescope orbits Earth 621 km above Earth's surface. What is the period of the telescope's orbit? Give answer with 5 significant figures.
*Wednesday, October 3, 2012 at 10:24pm*

**science **

how many days would it take to fly to Jupiter (from Earth) in a space shuttle at 45,000 miles per hour? The minimum distance between the Earth and Jupiter is 365 million miles.
*Wednesday, October 3, 2012 at 9:44pm*

**Physics**

Each of the space shuttle's main engines is fed liquid hydrogen by a high-pressure pump. Turbine blades inside the pump rotate at 635 rev/s. A point on one of the blades traces out a circle with a radius of 0.021 m as the blade rotates. (a) What is the magnitude of the ...
*Tuesday, October 2, 2012 at 5:45pm*

**space**

What causes the rings around the equators of Saturn and jupiter
*Tuesday, October 2, 2012 at 5:29pm*

**Physical science **

I need help on how to set up a formula for 27c and 750 mm hg,a sample of hydrogen occupies 5.00 l how much space will it occupy at stp
*Tuesday, October 2, 2012 at 5:29pm*

**Uni Physics**

A 67 kg astronaut (Jeff), an 88 kg astronaut (Brett) and a 17 kg rock are tied together by a light rope during a space walk. The distance between Jeff and the rock is 5.0 m, the distance between Brett and the rock is 2.0 m. Find the position of the centre of mass of the system...
*Tuesday, October 2, 2012 at 12:00am*

**stor**

Suppose that you flip a fair coin (P(H)=P(T)=1 2 ) three times and you record if it landed on heads, H, or tails, T. (a) What is the sample space of this experiment? What is the probability of each event? (b) [1 pt] Let X be the number of times that you observe heads. What ...
*Saturday, September 29, 2012 at 6:18pm*

**Math**

Pool tables are rectangular, and their length is twice the width. Find the dimensions of a pool table if it occupies 162 ft2 of floor space
*Friday, September 28, 2012 at 6:33pm*

**7th grade Science help**

1. _______ is energy that flows from an object with a higher temperature to an object with a lower temperature. (1 point) Heat Radiation Potential Chemical 2. The transfer of energy that occurs when molecules bump into one another is called _____. (1 point) radiation ...
*Wednesday, September 26, 2012 at 7:51pm*

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