Tuesday
April 21, 2015

Homework Help: Science: Outer Space

Recent Homework Questions About Outer Space

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

chemistry
lithium oxide is an effective absorber of carbon dioxide and can be used to purify air in confined areas such as space vehicles. what volume of carbon dioxide can be absorbed by 1.00 kg of lithium oxide at 25 degrees C and 1.00atm? Li2O(aq) +CO2(g) -> Li2Co3(s)
Sunday, November 2, 2014 at 10:07am

physics
A cylindrically shaped space station is rotating about the axis of the cylinder to create artificial gravity. The radius of the cylinder is 159 m. The moment of inertia of the station without people is 4.23 x 109 kg·m2. Suppose 299 people, with an average mass of 67.0 ...
Sunday, November 2, 2014 at 1:04am

6th grade science
we had this question on a test the measure of the amount of SPACE occupied by an object is its: weight mass area volume I put volume and it was marked wrong. The teacher said it was mass. I looked it up and still think I am correct, can you tell me which is correct? Thanks
Thursday, October 30, 2014 at 8:22pm

Geometry
A carpenter is building a staircase using his knowledge of right angles. The steps have a horizontal landing and a vertical rise causing each step to be a right triangle cut out. Depending on the purpose, steps may be adjusted by the angle of elevation which determines the ...
Thursday, October 30, 2014 at 5:00pm

Physics
A 0.50 kg hammer is taken on a space mission. What is its weight on a planet where the acceleration due to gravity is 3.8 m/s2? 0.50 kg 1.9 kg 0.50 N 1.9 N
Thursday, October 30, 2014 at 12:26am

The practice of working with school age children
One effective way to include children in developing an attractive environment is to ask them A. to describe their bedrooms. B. what color they want their car to be. C. to describe how their mom sets up the house. D. what they would do with an open space. D.
Wednesday, October 29, 2014 at 8:27pm

ms. sue
Multiple Choice 1. Which of the following terms refers to an object that orbits the sun and has enough gravity to be spherical but has not cleared the area of its orbit? (1 point) comet asteroid dwarf planet planet 2. Which of the following statements about the solar system&#...
Wednesday, October 29, 2014 at 4:30pm

science
Multiple Choice 1. Which of the following terms refers to an object that orbits the sun and has enough gravity to be spherical but has not cleared the area of its orbit? (1 point) comet asteroid dwarf planet planet 2. Which of the following statements about the solar system&#...
Wednesday, October 29, 2014 at 4:19pm

Physics
A space craft made up of two parts with masses m1 = 2.3 kg and m2 = 3.4 kg is held together by explosive bolts against a spring. The spring is compressed by 73.0 cm and has negligible mass. After the bolts are exploded m1 is found to have a speed of 3.6 m/s away from the ...
Monday, October 27, 2014 at 5:28pm

Physics , Pls help
A space station consists of two donut-shaped living chambers, A and B, that have the radii shown in the figure. As the station rotates, an astronaut in chamber A is moved 2.06 x 102 m along a circular arc. How far along a circular arc is an astronaut in chamber B moved during ...
Saturday, October 25, 2014 at 9:46pm

Secondary Math
Fill in the empty spaces to complete the puzzle. In any row, the two left spaces should multiply to equal the right-hand space. In any column, the two top spaces should multiply to equal the bottom space. ________| - 3 | ___________ 3 | -5x+1 |-15x+3 _______ | ________| 30x&...
Friday, October 24, 2014 at 10:56pm

Art
In the painting The Bridge at Argenteuil by Claude Monet how did the artist create interesting textures in this image? a. by experimenting with various brushstrokes b. by using only one color c. by concentrating on negative space d. by using no change values Is the answer A?
Friday, October 24, 2014 at 4:40pm

Need Help asap for math!
A plane is steering at S83degreesE at an air speed of 550 km/h. The wind is from N70degreesE at 85km/h. Find the ground velocity of the plane to 1 decimal space.
Friday, October 24, 2014 at 1:01am

Accounting
I need to know how to journalize this in a General Journal, but I don't know if it is required to even write down. Signed a lease agreement to rent office space for $975 per month, beginning Feb 1st. Nothing was paid today. (This happened on Jan 15)
Thursday, October 23, 2014 at 2:08pm

Geometry- thanks reiny
what's a composite space in two boxes I don't understand because there's two boxes that are together and they want the volume
Wednesday, October 22, 2014 at 11:29pm

physics...damon please help
Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115°F. Six months later the temperature has dropped to -2°F.How much space now exists between each rail?
Wednesday, October 22, 2014 at 2:51pm

physics... PLEASE HELP
en meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115°F. Six months later the temperature has dropped to -2°F.How much space now exists between each rail? (The linear expansion coefficient for steel is ...
Wednesday, October 22, 2014 at 2:16pm

guidance
The basis of a good child-guidance system is the caregiver's A. knowledge of child development.B. choice of equipment.C. arrangement of space in the facility.D. schedule of activities.  A.
Wednesday, October 22, 2014 at 12:28pm

guidance
The basis of a good child-guidance system is the caregiver's A. knowledge of child development.B. choice of equipment.C. arrangement of space in the facility.D. schedule of activities. A.
Tuesday, October 21, 2014 at 11:23pm

Physics
Ninja goes to space! If Ninja has a weight of 83.59 N on earth and she lands on a planet that has an acceleration due to gravity of 1.44 m/s2, then what is her weight on the new planet?
Tuesday, October 21, 2014 at 10:34pm

physics
Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115°F. Six months later the temperature has dropped to -2°F.How much space now exists between each rail?
Tuesday, October 21, 2014 at 12:26pm

physics
Ten meter long steel railroad rails are laid end to end, with no space between, on a hot day when the temperature is 115°F. Six months later the temperature has dropped to -2°F.How much space now exists between each rail?
Tuesday, October 21, 2014 at 10:46am

Physics
Suppose the surface (radius = r) of a cylindrical space station is rotating at 29.1 m/s to provide artificial gravity. What must be the value of r for the astronauts to weigh 1/3 of their earth weight? Don't know how to start please help.
Monday, October 20, 2014 at 11:35pm

planning & implementing for the environment
Which of these factors is most likely to determine the total number of children you can take into your facility? A. Children's needs B.Physical space available C.program philosophy D.staff members skills B.
Monday, October 20, 2014 at 6:02pm

Calculus
The number of bacteria after t hours in a controlled laboratory experiment is n=f(t). Suppose there is an unlimited amount of space and nutrients for the bacteria. Which do you think is larger, f'(5) or f'(10)? If the supply of nutrients is limited,would that affect ...
Saturday, October 18, 2014 at 2:44pm

Calculus
The number of bacteria after t hours in a controlled laboratory experiment is n=f(t). Suppose there is an unlimited amount of space and nutrients for the bacteria. Which do you think is larger, f'(5) or f'(10)? If the supply of nutrients is limited,would that affect ...
Friday, October 17, 2014 at 10:50pm

physics
A laser that emits pulses of UV lasting 2.95 ns has a beam diameter of 4.05 mm. If each burst contains an energy of 4.60 J, what is the length in space of each pulse? What is the average energy per unit volume (the energy density) in one of these pulses?
Friday, October 17, 2014 at 9:59pm

Physics
You are making a trip in a space shuttle, and your friend Jimmy is in another space shuttle. He shares the same circular orbit with you, 370 km above earth. However, he is 21 km ahead of you. A) How long will it take you to catch up with your friend if you reduce your orbital ...
Friday, October 17, 2014 at 6:13pm

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Homework Help: Science

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