Monday

May 25, 2015

May 25, 2015

**math vectors**

Use a specific example to prove that the cross product is also not associative. That is, use three specific vectors in 3-space to show that Vector a×(Vector b × Vector c) is not equal to (Vector a × Vector b) × Vector c. Can you help me think of an ...
*Friday, February 27, 2015 at 7:29pm*

**ela**

. In The Diary of Anne Frank, Act I, what causes the Franks and the Van Daans to move into the rooms on the top floor of the warehouse? A. Their own homes have been destroyed by bombs. B. They are hiding from the Nazis, who have been persecuting Jews. C. The warehouse has more...
*Friday, February 27, 2015 at 6:40pm*

**linear algebra**

Let V be the set of all real-valued continuous functions defined on R1. If f and g are in V, we define f ⊕ g by (f ⊕ g)(t) = f(t) + g(t). If f is in V and c is a scalar, we define c f by (c f)(t) = cf(t). Then V is a vector space, which is denoted by C(−&#...
*Thursday, February 26, 2015 at 4:20pm*

**math**

let V be the set of all real-valued continuous functions defined on R1. If f and g are in V, we define f ¨’ g by (f ¨’ g)(t) = f(t) + g(t). If f is in V and c is a scalar, we define c f by (c f)(t) = cf(t). Then V is a vector space, which is denoted by C(&#...
*Thursday, February 26, 2015 at 11:30am*

**math**

Which of the following subsets of the vector space Mnn are subspaces? (a) The set of all n × n symmetric matrices (b) The set of all n × n diagonal matrices (c) The set of all n × n nonsingular matrices
*Wednesday, February 25, 2015 at 4:25pm*

**English**

Can someone please explain this poem to me and also the literary devices used? Thanks! "Like This" If anyone asks you how the perfect satisfaction of all our sexual wanting will look, lift your face and say, Like this. When someone mentions the gracefulness of the ...
*Wednesday, February 25, 2015 at 12:09am*

**science**

CAN ONE IN THEORY OR ACTUAL DEPRIVE A PARTICULAR AREA OF SPACE; 1sq mile of space of oxygen while the surrounding area of space has normal levels of oxygen?.... This question is not limited by the use of other chemicals or machinations to achieve GOAL....
*Tuesday, February 24, 2015 at 8:51am*

**art**

where is the negative space in the rubin case?
*Monday, February 23, 2015 at 11:41am*

**chemistry**

The Russian Mir space station used a chemical oxygen generator system to make oxygen for the crew. The system ignited a tube of solid lithium perchlorate (LiClO4) to make oxygen and lithium chloride (LiCl): LiClO4 (s) 2O2 (g) + LiCl (s) If you have 500 g of LiClO4, ...
*Friday, February 20, 2015 at 1:48pm*

**science(sound #3)**

Space has no air, what is another name for no air?
*Wednesday, February 18, 2015 at 6:53pm*

**Science**

In which of the following situations is a sound wave most likely to travel through air? A. An alarm clock rings in a vaccum. B. A giant star explodes. C. A grasshopper eats a leaf. D. An astronaut uses tools in space. Is the answer A? Thank you.
*Wednesday, February 18, 2015 at 5:31pm*

**Algebra 2**

A large asteroid crashed into a moon of a planet, causing several boulders from the moon to be propelled into space toward the planet. Astronomers were able to measure the speed of one of the projectiles. the distance (in feet) that the projectile traveled each second, ...
*Wednesday, February 18, 2015 at 12:15pm*

**Astronomy**

The Hubble Space Telescope orbits at an altitude of 600 km above the Earth's surface. Assuming it is in a stable circular orbit, what is its velocity? For reference, the Earth's radius is 6400 km and Earth's mass is 6 x 10^24 kg. The formula to solve for circular ...
*Sunday, February 15, 2015 at 6:55pm*

**fundamental concepts**

Free play, eating a snack, painting, hearing a story, and so forth are related to which of the following learning concepts? A. Space B. Classification C. Size D. Time a.
*Sunday, February 15, 2015 at 12:27pm*

**statistics**

Listed below are the duration's (in hours) of a simple random sample of all flights of a space shuttle program. Find the range, variance, and standard deviation for the sample data. Is the lowest duration time unusual? Why or why not? 71, 100, 237, 199, 164, 269, 193, 379...
*Friday, February 13, 2015 at 1:35am*

**Physics**

A spaceship in deep space has a velocity of 4000 km/s and an acceleration in the forward direction of 6 m/s2. What is the acceleration of a ball relative to the spaceship after it is released in this spaceship?
*Thursday, February 12, 2015 at 4:02pm*

**Physics**

What is the maximum total force exerted on a 71 kg astronaut by her seat during the launch of the Space Shuttle?
*Thursday, February 12, 2015 at 1:59pm*

**statistics**

Listed below are the duration's (in hours) of a simple random sample of all flights of a space shuttle program. Find the range, variance, and standard deviation for the sample data. Is the lowest duration time unusual? Why or why not? 71 100 237 199 164 269 193 379 252 233...
*Wednesday, February 11, 2015 at 7:15am*

**probabilitie**

Mary and Tom park their cars in an empty parking lot with n>=2 consecutive parking spaces (i.e, n spaces in a row, where only one car fits in each space). Mary and Tom pick parking spaces at random. (All pairs of parking spaces are equally likely.) What is the probability ...
*Tuesday, February 10, 2015 at 4:35pm*

**Physics**

A proton is initially at rest in empty space, when suddenly an electric field of magnitude 8.0 x 10 4 n/c and direction due east is turned on. what is the magnitude and direction of the initial acceleration of the proton? Repeat the problem, but with an electron.
*Monday, February 9, 2015 at 7:40pm*

**ENGLISH**

The space shuttle was both a marvel and huge.
*Thursday, February 5, 2015 at 8:44am*

**fundamental concept**

"Close and far away" is an example of which of the following space concepts? A. Direction B. Position C. Distance D. Construction my answer is c.
*Wednesday, February 4, 2015 at 1:41pm*

**fundamental concepts**

"Above and below" is an example of which of the following space concepts? A. Distance B. Construction C. Direction D. Position answer c.
*Wednesday, February 4, 2015 at 12:25pm*

**Fundamental concepts**

Which of the following activities emphasizes the concept of space? A. Figuring out how many pieces of candy will fit into a jar B. Matching pictures of animals to their written names C. Figuring out how fish swim D. Using the sense of touch to describe balls my answer is a.
*Wednesday, February 4, 2015 at 12:08pm*

**Physics **

7. An early objection to the idea that the earth is spinning on its axis was that the earth would turn so fast at the equator that people would be thrown into space. Show the error in this logic by calculating the centripetal force needed to hold a 100. kg person in place at ...
*Monday, February 2, 2015 at 8:41pm*

**physics**

A space satellite has a total mass of 500kg. A portion of mass 20kg is ejected a velocity of 10ms-1 . Calculate the recoil velocity of the remaining portion (ignoring the initial velocity of the satellite).
*Monday, February 2, 2015 at 10:06am*

**english**

The space shuttle was both a marvel and huge.
*Monday, February 2, 2015 at 9:04am*

**Physics**

The space shuttle is in a 3e+5 m high orbit over the earth. The radius of the earth is 6.37e+6 m, the mass of the earth is 5.98e+24 kg. What is the distance from the center of the earth to the space shuttle? I don't know whether I would double the radius and the add the ...
*Saturday, January 31, 2015 at 11:09am*

**chemistry**

nearest star distance of 4.3 light years proxima centauri is the nearest star to our solar system. what is the distance to proxima centauri kilometers? the speed of light in space is 2.998 x10^8 m/s.
*Friday, January 30, 2015 at 8:48pm*

**Physics**

An object in space is initially stationary relative to the Earth. Then, a force begins acting on the object, starting with a force of 0 N, and increasing at a uniform rate until the magnitude of the force is 56 N after the force has acted for 10 s. The body has a mass of 15 kg...
*Friday, January 30, 2015 at 5:51pm*

**reading**

Scientists generally agree that Earth is getting warmer due to what's called the greenhouse effect. A greenhouse used for plants stays warm because sunlight and heat coming through the glass roof are mostly trapped. The heat doesn't radiate back into the atmosphere ...
*Friday, January 30, 2015 at 3:01pm*

**physics**

a) Determine the capacitance, in pF, of a paper-filled parallel-plate capacitor (dielectric constant=3.70) having a plate area of 5.40cm2 and plate separation of 590 µm. Use 8.85 x 10-12 F/m for εo, the permittivity of free space. For this I got 2998.53x10-2 b) ...
*Friday, January 30, 2015 at 2:27pm*

**physics**

Determine the capacitance, in pF, of a paper-filled parallel-plate capacitor (dielectric constant=3.70) having a plate area of 5.40cm2 and plate separation of 590 µm. Use 8.85 x 10-12 F/m for εo, the permittivity of free space
*Friday, January 30, 2015 at 1:46pm*

**physics**

A capacitor is rolled from two strips of aluminum separated by two strips of paraffin-coated paper. Each strip is 5.40cm wide. The foil is 7.00μm thick, and the paper is 50.0μm thick. What length, in cm, should the strips be if a capacitance of 24.0nF is desired? Use...
*Friday, January 30, 2015 at 1:38pm*

**Science**

Which explains the greenhouse effect? A. Greenhouse gases like water vapor and carbon dioxide trap heat in the atmosphere, thereby radiating heat energy back into space. B. Greenhouse gases like water vapor and carbon dioxide release heat in the atmosphere, thereby radiating ...
*Thursday, January 29, 2015 at 5:54pm*

**Science**

Please could someone check these for me. 1In a series of rock layers, a geologist finds fossils of a lizard-like dinosaur and a fern-like tree in layers that are 1.0 m and 1.5 m deep. However, in a layer that is 2.0 m deep, he finds fossils of bony fish and shellfish. Which ...
*Thursday, January 29, 2015 at 3:52pm*

**math**

Two station astronauts will each perform three 8-hour EVAs within 13 days to repair a damaged solar panel that was impacted by a micrometeoroid on the space station. What is the total amount of oxygen needed by the two astronauts to accomplish this? Please put your answer in ...
*Thursday, January 29, 2015 at 6:43am*

**Physics**

What is the Earth's gravitational force on you when you are standing on the Earth and when you are riding in the Space Shuttle 380 km above the Earth's surface? Answer as a fraction of the surface gravity of Earth. (The Earth's radius is 6400 km.)
*Tuesday, January 27, 2015 at 1:55pm*

**Physics**

You (m=75.0 kg) are floating outside your space station, and- oh no- a siren sounds, and the doors start to close! At the instant the siren sounds, you are exactly 10.0 m from the station doors and floating away from the space station at a speed of 1.00 m/s. The doors will ...
*Tuesday, January 27, 2015 at 12:27am*

**Science**

Check My Answers, please? Which of the following planets is considered a rocky, or terrestrial, planet? Venus **** Neptune Saturn Uranus Which of the following statements about the beginning of the solar system is true? The planets that formed closest to the sun became gas ...
*Monday, January 26, 2015 at 3:35pm*

**Physics**

A 64.3 kg astronaut is on a space walk when the tether line to the shuttle breaks. The astronaut is able to throw a 10.0 kg oxygen tank in a direction away from the shuttle with a speed of 11.9 m/s, propelling the astronaut back to the shuttle. Assuming that the astronaut ...
*Monday, January 26, 2015 at 12:11am*

**Physics**

A 83.8 kg astronaut is working on the en- gines of a spaceship that is drifting through space with a constant velocity. The astronaut turns away to look at Earth and several sec- onds later is 39.6 m behind the ship, at rest relative to the spaceship. The only way to re- turn ...
*Sunday, January 25, 2015 at 11:45pm*

**chemistry**

Diborane (B2H6) is a highly reactive boron hydride, which was once considered as a possible rocket fuel for the U.S. space program. Calculate ∆H for the synthesis of diborane from its elements, according to the equation 2 B (s) + 3 H2 (g) → B2H6 (g) using the ...
*Sunday, January 25, 2015 at 4:09pm*

**physics**

An 94.4 kg astronaut is working on the engines of a spaceship that is drifting through space with a constant velocity. The astronaut turns away to look at Earth and several seconds later is 29.6 m behind the ship, at rest relative to the spaceship. The only way to return to ...
*Sunday, January 25, 2015 at 12:01pm*

**Math .Static**

Consider two events A and B in the same sample space such that P(A)=0.4 and P(B)=0.3. Then A and B are mutually exclusive. True or False
*Saturday, January 24, 2015 at 10:59pm*

**concept development**

Free play, eating a snack, painting, hearing a story, and so forth are related to which of the following learning concepts? A. Space B. Classification C. Size D. Time my answer is d.
*Saturday, January 24, 2015 at 11:21am*

**Physics **

A(n) 57.3 kg astronaut becomes separated from the shuttle, while on a space walk. She finds herself 54.3 m away from the shuttle and moving with zero speed relative to the shuttle. She has a(n) 0.697 kg camera in her hand and decides to get back to the shuttle by throwing the ...
*Thursday, January 22, 2015 at 11:09pm*

**maths**

Five flash cards having odd numbers from 11 are shuffled well and one card is drawn from it write the sample space
*Thursday, January 22, 2015 at 9:28am*

**math**

Jamiebeatimates that,when he arrives at work tomorrow morning,there is a probability that 0.4 that he will find a convenient parking space. What is Jamie to say? A. It is very unlikely that he will find a convenient parking space. B.it is somewhat unlikely that he will find a ...
*Thursday, January 22, 2015 at 5:57am*

**math**

In Carl's drawer, he has white,gray,and black socks. In his closet,he has black brown,and blue shoes. I need to make a diagrdiagram to display the sample space for Carl choosing a sock and shoe color. Is this right White/black,brown blue Gray/black,brown,blue Black/black ...
*Wednesday, January 21, 2015 at 10:25pm*

**Civics**

"__________ should be upheld by all political parties. They would neither advise others to break the law, nor encourage others to do so even when the strongly disagree with the legislation put forward by the government of the day.' Which phrase or term best fills the ...
*Sunday, January 18, 2015 at 5:25pm*

**math**

4 PART Your weight on different planets is affected by gravity. An object that weighs 150 pounds on Earth weighs only 56.55 pounds on Mars. The same object weighs only 24.9 pounds on the Moon. A)What percent of an object's Earth weight is its weight on Mars and on the Moon...
*Wednesday, January 14, 2015 at 5:00pm*

**English**

1. She has flown on three shuttles. The shuttles were Discovery, Atlantis, and Columbia. 2. She was the first woman to earn the Congressional Space Medal of Honor. This award is given by the President of the United States. I'm writing with nouns and have to combine these ...
*Tuesday, January 13, 2015 at 10:22pm*

**ENGLISH - GRAMMAR ????**

There was no space in the drawing room. - Drawing room - uncountable The sand on the beach was clean. beach - uncountable Ruman met with an accident. Accident - uncountable Are the above are correct?
*Monday, January 12, 2015 at 10:34am*

**Math**

When finding the perimeter of the figure on a grid why do you not count the space inside the grid
*Saturday, January 10, 2015 at 10:14am*

**algebra 1**

A town is organizing a parade. There will be floats of only 2 sizes, 30ft. and 15ft. A space of 10 ft. will be left after each float. a. the parade must be at least 150 feet long, but less than 200ft long. what is the combinations of large and small floats are possible? b. ...
*Friday, January 9, 2015 at 3:03pm*

**Chemistry**

For each reaction, write the chemical formulae of the oxidized reactants in the space provided. Write the chemical formulae of the reduced reactants in the space provided. 2AgNO3 + Cu -> 2Ag + Cu(NO3)2 Reduced:Cu->Cu+ +1e- Oxidized: Ag+ + 1e- -> Ag ????????????????????
*Thursday, January 8, 2015 at 11:29am*

**physics **

A proposed space station consists of a circular tube that will rotate about its center(like a tubular bicycle tire). The circle formed by the tube has a diameter of 1.1km. What must be the rotation speed(revolutions per day) in an effect nearly equal to gravity at the surface ...
*Wednesday, January 7, 2015 at 11:33pm*

**sociology**

What does "Social Space" mean when we talk about location
*Saturday, January 3, 2015 at 1:13am*

**Rocket Science**

Calculate the minimum change in velocity (delta V or ∆V) required for the Space Shuttle to decrease its altitude to 60 miles if it’s orbiting with an apogee of 246 miles and a perigee of 212 miles above the surface of Earth
*Thursday, January 1, 2015 at 8:13pm*

**chemistry**

forums.studentdoctor.n et/thr eads/equilibrium-calculation.1113998/ Please to delete space
*Tuesday, December 30, 2014 at 11:28am*

**Physics**

Station Math Two station astronauts will each perform two 8-hour EVAs within 13 days to repair a damaged solar panel that was impacted by a micrometeoroid on the space station. What is the total amount of oxygen needed by the two astronauts to accomplish this? Please put your ...
*Saturday, December 27, 2014 at 1:52am*

**Chemistry**

I need help with this question. 1. You have a tank of helium with a volume of 10 liters that is currently under 40 atm of pressure. If you open the valve on the tank and release the helium into a room with a volume of 10,000 liters, how many atmospheres of pressure will the ...
*Thursday, December 18, 2014 at 2:12pm*

**Chemistry**

You have a tank of helium with a volume of 10 liters that is currently under 40 atm of pressure. If you open the valve on the tank and release the helium into a room with a volume of 10,000 liters, how many atmospheres of pressure will the helium now be under? Second, what ...
*Thursday, December 18, 2014 at 2:07pm*

**caculus**

A 10-ft ladder rests against a vertical wall. If the bottom of the ladder slides away from the wall at a rate of 1 ft/sec, how fast, in ft/sec, is the top of the ladder sliding down the wall, at the instant when the bottom of the ladder is 6 ft from the wall? Answer with 2 ...
*Wednesday, December 17, 2014 at 1:45pm*

**Physics**

a 1000 kg space craft at 500 m/s is on a collision course with a 400 kg satellite travelling at 700 m/s . Their paths are converging at a 45 degree angle . After the collision they remain locked together. What is the final speed of both satellites? What angle is this at
*Friday, December 12, 2014 at 3:07pm*

**science**

2) Which is not an example of matter? A. water B. air(i think it this one) C. gold D. sound 3) The amount of space an object occupies is called its ..... A. volume(i think it this one) B. mass C. electricity D. gravity 4) Atoms in a molecule are joined together by.. A. ...
*Friday, December 12, 2014 at 9:51am*

**IMPROVING WRITING**

Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides secretarial support ...
*Wednesday, December 10, 2014 at 9:38pm*

**english**

Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides secretarial support ...
*Monday, December 8, 2014 at 5:43pm*

**English**

Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides secretarial support ...
*Sunday, December 7, 2014 at 6:22pm*

**Physics Electric**

The electric potential in a region is given by V(x,y,z) = -10.0x^2 + 20.0xyz + 6.0y^3 a) Find the electric field that produces this potential? b) Find the amount of charge contained within a cubic region in space 20 cm on a side and centered at the point (10.0 cm, 10.0 cm, 10....
*Saturday, December 6, 2014 at 6:47pm*

**Child Development **

1) The recording method that's most useful in discovering the causes or results of a child's behavior is A. rating scale. ￼B. time sampling. C. event sampling. D. checklist. 2) One way a teacher can help a child stand up for her rights is A. making other ...
*Thursday, December 4, 2014 at 7:57pm*

**English**

Astronauts are learned, taught to survive in space. I think learned? ?
*Thursday, December 4, 2014 at 6:53pm*

**accounts**

Diane Gobin is the founder and manager of Gobin's World. Diane has approached the local bank for a loan to expand her business. As part of the loan application, Diane was asked to prepare Financial Statements for the business. She prepared the following balance sheet and ...
*Thursday, December 4, 2014 at 7:54am*

**Improving Writing- REVISED VERSION**

Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides secretarial support ...
*Thursday, December 4, 2014 at 4:14am*

**math**

At Soap ans Suds there are 16 washing machines in a single row with no space between each one.Each washing mashine is 2 feet 5 inches across. What is the total length of the 16 washing machines?
*Wednesday, December 3, 2014 at 4:30pm*

**Improving writing **

Background Ten years ago, you started working as a clerk for DMD Medical Supplies. Six months ago, Liz Jakowski, the human resources director, promoted you to office manager. You manage two employees: Jack Snyder and Ruth Disselkoen. Your office provides secretarial support ...
*Wednesday, December 3, 2014 at 8:26am*

**Physics**

A proposed space station includes living quarters in a circular ring 50.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?
*Tuesday, December 2, 2014 at 2:54pm*

**English**

There are no pterodactyls in Ramirez’s front yard, but there are a mother dolphin, her baby, and two sheep. There’s a Don Quixote on his horse, aiming his lance at a windmill. There’s a space alien emerging from a flying saucer and an abstract baseball player ...
*Tuesday, December 2, 2014 at 10:53am*

**math calculus**

if i,j,k are the standard unit basic vectors, in 3 space, determine the value of k dot(j-3k)+(i-4k) dot (i-4k)-8 |i cross -k| (Simplify without using components)
*Monday, November 24, 2014 at 6:48pm*

**Living a Healthy Life**

The National Association for the Education of Young Children recommends a minimum of _______ square feet of usable floor space per child. A. 50 B. 10 C. 35 D. 45 C.
*Saturday, November 22, 2014 at 3:23pm*

**Finite Math**

Let A and B be two events in a sample space S such that P(A) = 0.5, P(B) = 0.6, and P(A intersection B) = 0.15. Find the probabilities below. Hint: (A intersection Bc) union (A intersection B) = A. (a) P(A|Bc) ________ (b) P(B|Ac) ________
*Thursday, November 20, 2014 at 10:13pm*

**physics**

An astronaut (mass of 100 kg, with equipment) is headed back to her space station at a speed of 0.750 m/s but at the wrong angle. To correct her direction, she fires rockets from her backpack at right angles to her motion for a brief time. These directional rockets exert a ...
*Wednesday, November 19, 2014 at 6:47pm*

**Art**

Sketchbook 7 by Vivian W. Which element did this artist use most to emphasize her original creation of a cotton candy creature? A. negative space B. color C. line D. texture Is the answer C?
*Tuesday, November 18, 2014 at 8:23pm*

**Algebra**

The Hubble Space Telescope can see stars and galaxies where brightness is 1/50 of the faintest objects now observable using ground-based telescopes. Use the fact that the brightness of a point source, such as a star, varies inversely as the square of its distance from an ...
*Tuesday, November 18, 2014 at 3:21pm*

**physics**

To create artificial gravity, the space station is rotating at a rate of 0.80 rpm. The radii of the cylindrically shaped chambers have the ratio rA/rB = 3.80. Each chamber A simulates an acceleration due to gravity of 10.0 m/s2.
*Sunday, November 16, 2014 at 9:09pm*

**Art**

Are my answers right? Which of the following is a convention Chinese artist Shen Zhou used in his brush paintings? He used only black ink to emphasize expressive brushstrokes. He painted several seated Buddha in the background. He painted flat, realistic figures to reflect ...
*Sunday, November 16, 2014 at 6:45pm*

**Crime Scene Sketching **

you will have the opportunity to practice sketching a room. Take measurements of a small room to which you have access. Plot out the simple floor plan. Review the methods of measurement and select one for this project. Pick an object in your room and use your chosen method to...
*Sunday, November 16, 2014 at 3:03am*

**Math **

Sally has 3 planting boxes . Each box is 4 feet wide and 8 feet long. How much space does she have altogether? Is it 3x4 + 3x8= 36 total feet?
*Wednesday, November 12, 2014 at 5:52pm*

**sci i think its b**

A student is trying to identify the different forms of energy described in the following chart: Form of Energy Description Examples Energy A energy that travels in waves through space light radio waves Energy B energy that depends on the height of an object a person at the top...
*Wednesday, November 12, 2014 at 1:55pm*

**Physics**

an astronaut of mass 150 kg is stranded 100 m from the international space station and is at rest relative to it he decides to throw his movie camera of mass 4.5 kg away at a speed of 10 m/s he has 5 minutes of air left in his tank does he make it back in time?
*Wednesday, November 12, 2014 at 8:27am*

**physics**

A space station shaped like a giant wheel has a radius of 1.00 x 10^2 m and a moment of inertia of 5.00 x 10^8 kgm^2. A crew of 150 lives on the rim, and the station is rotating so that the crew experiences an apparent acceleration of 1.0g. When 120 people move to the center ...
*Tuesday, November 11, 2014 at 11:11pm*

**Physics- spring constant **

Astronauts are in space so there is no gravity, but they wish to weight themselves. The spring constant is 265 N/m. The question shows a graph; the y is the position in meters while the x is the seconds. I do not wish for an answer, but the way in which i'm supposed to ...
*Tuesday, November 11, 2014 at 7:15pm*

**Math**

how much space do sleeping quarters take if the sleeping quarters are for 100 guests and average density of the sleeping quarters are 15kg/m2
*Monday, November 10, 2014 at 6:33pm*

**Physics**

A space vehicle is orbiting Earth in a circular orbit with a radius of 10,300,000m. What is the minimum increase in speed that is needed for the vehicle to escape Earth's gravitational field? The mass of the Earth is 5.97x10^24 kg and G = 6.67x10^-11 N*m^2/kg^2. The answer...
*Monday, November 10, 2014 at 10:38am*

**math**

which would be better for determining the sample space, a tree diagram or an area model? Justify your answer
*Saturday, November 8, 2014 at 8:18pm*

**geometry**

Eddie is arguing with tana about the probability of flipping three coins. They decided to flip a penny, nickel, and a dime. Which would be better determining the sample space, a tree diagram or an area model? Justify your answer.
*Saturday, November 8, 2014 at 6:08pm*

**Physics**

What is the apparent weight of a 70-kg astronaut 3800 km from the center of the earth's moon in a space vehicle moving at constant velocity and acceleration toward the moon at 2.9m/s^2? State the direction in each case.
*Thursday, November 6, 2014 at 11:30pm*

**Calculus**

When estimating distances from a table of velocity data, it is not necessary that the time intervals are equally spaced. After a space ship is launched, the following velocity data is obtained. Use these data to estimate the height above the Earth's surface at 120 seconds...
*Thursday, November 6, 2014 at 10:10pm*

**physics**

A space station Radar locates sattelites A and B at a certain moment: A_0=(a_1,0,1^3), B_0=(0,b_2,b_3) the space station is located at (0,0,0) and the sattelites moves with a uniform velocity related to the space station: v_A=(V_A,0,0), v_B=(V_B,V_B,0) what is the minimal ...
*Sunday, November 2, 2014 at 2:32pm*