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April 23, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

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earth
1. b 2. b
Wednesday, July 3, 2013 at 1:48pm

science
Create an APA reference for this chapter of the publication as one would find in the APA reference page (2 marks): Title of book: SUPERHEROES ON EARTH Pages in book: 1-250 Chapter Title: SECRET IDENTITES Pages of chapter: 45-67 Author: BRUCE WAYNE AND CLARK KENT Editors: JACK ...
Wednesday, July 3, 2013 at 1:17pm

general physics
the gravitational constant G =6.67•10⁻¹¹ N•m²/kg², Earth’s mass is M = 5.97•10²⁴kg, Earth’s radius is R = 6.378•10⁶ m. r=R+h =6.378•10⁶ +0.327•10⁶ =... ma=F F =G•m•M/r²...
Monday, July 1, 2013 at 6:23pm

general physics
His spacecraft, Vostok I, was a sphere about 2.3 m in diameter, and it reached a maximum altitude above Earth’s surface of 327 km. What was the spacecraft’s speed at this point in its orbit?
Monday, July 1, 2013 at 5:56pm

ALGEBRA
A satalites escape velocity is 6.5 mi/sec, the radius of the earth is 3960 miles and the earth's gravitational constant(g) is 32.2 ft/sec^2 How far is the satelite from the surface of the earth?
Monday, July 1, 2013 at 1:30pm

physics
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 x 106 m, determine the speed and centripetal acceleration of a person ...
Monday, July 1, 2013 at 1:06pm

physics
Even though we have found an earth sized planet around the nearest star Alpha Centauri B, we're not even close to getting there. To see this let's think about the duration of a flight to Alpha Centauri B, which is about 4×1016 meters away. Imagine a rocket that ...
Monday, July 1, 2013 at 1:05pm

Phyiscs
the gravitational constant G =6.67•10⁻¹¹ N•m²/kg², Earth’s mass is M = 5.98•10²⁴kg, Earth’s radius is R = 6.38•10⁶ m. T=L/v F = m₁•m₂/R= G•m•M/(2.07R) ² F=ma=m•v²...
Monday, July 1, 2013 at 3:38am

Phyiscs
A satellite circles the earth in an orbit whose radius is 2.07 times the earth's radius. The earth's mass is 5.98 x 1024 kg, and its radius is 6.38 x 106 m. What is the period of the satellite?
Sunday, June 30, 2013 at 8:50pm

physics
Geosynchronous communications satellites are placed in a circular orbit that is 3.59 107 m above the surface of the earth. What is the magnitude of the acceleration due to gravity at this distance?
Thursday, June 27, 2013 at 3:25pm

essex county
a robe exert a force on a 20kg crate. the crate starts from rest and accelerates upward at 5m/s^2 near the surface of the earth. how much work was done by the force in raising the crate 4.0m above the floor?
Thursday, June 27, 2013 at 12:22pm

physics
Suppose the Earth's orbit is divided in two by its minor axis as shown in the figure. How much longer in days does the Earth spend in one half than the other? The eccentricity of an elliptical orbit is defined as e:=a/c where c is the semi-major axis and a is the distance ...
Tuesday, June 25, 2013 at 9:06pm

astonomy
Assume that earth and mars are perfect spheres with the radii of 6,371km and 3,390 km, respectively. Calculate the surface area of earth. b)calculate surface area of mars
Tuesday, June 25, 2013 at 4:15pm

physics
A satellite moves in a circular orbit around the Earth at a speed of 5 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 1024 kg. The value of the universal ...
Monday, June 24, 2013 at 7:40pm

physics
A rocket of mass 4.36 × 105 kg is in flight near earth's surface. Its thrust is directed at an angle of 58.9° above the horizontal and has a magnitude of 9.61 × 106 N. Find the (a) magnitude and (b) direction of the rocket's acceleration. Give the ...
Monday, June 24, 2013 at 12:09pm

phyisics
If approximately 70% of the Earth's surface is covered with water, what is the order of magnitude for the number of raindrops in the world's oceans?
Saturday, June 22, 2013 at 5:07am

physics
a watermelon has a mass of 8kg and 600 g . how mich force of gravity of the earthwill it experience ?what will be its weight on the earth and the moo
Friday, June 21, 2013 at 10:04am

Math
Three ships — the Nina, the Pinta, and the Santa Maria — are setting sail from Spain on a mission to find the shortest route to the West Indies. The year is 1492 and Columbus is about to sail the ocean blue... "NO! It can't be so!" shouted Captain ...
Thursday, June 20, 2013 at 10:20am

Physics
W = m•g =G•m•M/R² g= G•M/R² the gravitational constant G =6.67•10⁻¹¹ N•m²/kg², Earth’s mass is M = 5.97•10²⁴kg, Earth’s radius is R = 6.378•10⁶ m.
Wednesday, June 19, 2013 at 4:18am

Physics tough
If approximately 70% of the Earth's surface is covered with water, what is the order of magnitude for the number of raindrops in the world's oceans? Hint: The order of magnitude of 2478=2.478×10^3 is 3.
Wednesday, June 19, 2013 at 2:19am

physics
the gravitational constant G =6.67•10⁻¹¹ N•m²/kg², Earth’s mass is M = 5.97•10²⁴kg, Earth’s radius is R = 6.378•10⁶ m. r = 850000 m ma=F mv²/(R+r)= G•m•M /(R+r)² v=sqrt{G•M /(R+r...
Tuesday, June 18, 2013 at 5:22pm

physics
a polar satellite is launched at 850 km above Earth .find its orbital speed.
Tuesday, June 18, 2013 at 11:18am

electronics technician
19. In a solenoid, where is the magnetic field strongest? A. Outside the coil C. At the north pole B. Inside the coil D. At the south pole 20. What is a typical coil voltage for a low-voltage relay circuit? A. 2 VDC C. 12 VDC B. 5 VDC D. 120 VDC 21. Electromagnetic stepping ...
Tuesday, June 18, 2013 at 10:26am

math
A mason's assistant's rate of pay is $0.75 per cubic foot of earth moved. He moves 220 cubic feet of earth to dig a trench. What is his pay for this job? THE ANSWER IS NOT &330
Monday, June 17, 2013 at 2:36pm

Math
PLEASE HELP !!! A mason is putting in the foundation for a wall. His assistant digs a trench in roughly the shape of a rectangular solid measuring 50 ft. in length, 12 inches deep along both sides, and 12 inches wide at the top and bottom. How many cubic feet of earth did he ...
Monday, June 17, 2013 at 12:28pm

Physics
124, I have no idea what on earth I'm doing wrong, followed your formula... and input values and got the same answer everytime I tried, apparently its incorrect! :( Can you input my values and see what answer you get?
Monday, June 17, 2013 at 11:48am

math
1.Mark makes Php 40.00 per hour if he works 40 hours or less.If works overtime,he makes an additional Php 5.00 per hour as overtime pay.What would be his total pay if he worked 58 hours? 2.The world's greatest known ocean depth of 36,201 feet was recorded in the Marianas ...
Monday, June 17, 2013 at 5:16am

physics
The free-fall acceleration on the surface of Jupiter is about two and one half times that on the surface of the Earth. The radius of Jupiter is about 11.0 RE (RE = Earth's radius = 6.4 106 m). Find the ratio of their average densities, ρJupiter/ρEarth.
Sunday, June 16, 2013 at 1:10pm

Physics
What is the gravitation field strength of a height above the surface of the earth? R is the radius of the earth. Ans a, pls correct
Saturday, June 15, 2013 at 9:33am

Physics
What is the gravitation field strength of a height above the surface of the earth? R is the radius of the earth. Ans a, pls correct
Saturday, June 15, 2013 at 9:32am

Physics
A centrifuge can be used to separate cells from a liquid. To increase the rate at which objects can be separated from solution, it is useful to make the centrifuge's speed as large as possible. If you want to design a centrifuge of diameter 1.4 m to have a force of 128,000...
Friday, June 14, 2013 at 12:39pm

Physics
A skydiver is jumping from an airplane traveling at 10.0 m/s. The plane is 3520 m above the earth. The sky diver pulls his cord at 1760 m above the earth. Neglecting air resistance, how far does the skydiver travel horizontally before pulling the cord?
Friday, June 14, 2013 at 11:15am

Science
What is the circular velocity of an Earth satellite 1000. km above Earth's surface? (Note: Earth's average radius is 6371 km.)
Thursday, June 13, 2013 at 10:09pm

Science
Compared with the strength of Earth's gravity at its surface, how much weaker is gravity at a distance of 10 Earth radii from Earth's center? At 20 Earth radii?
Thursday, June 13, 2013 at 10:08pm

space
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? Show proof of your answer through ...
Thursday, June 13, 2013 at 1:05am

Phyics Toughest question on earth
Try 16.13 seconds. Is it correct?
Tuesday, June 11, 2013 at 10:55am

physics
a. google van de grafe generator b. lines go from + to -. In a dielectric, the E is reduced. c. he potential of upper surface is 400KV w.r.t the Earth surface which itself has a electric field of 100V/m. Now, since we are always in contact with ground, we are at same potential...
Monday, June 10, 2013 at 10:51am

physics
1.descibe the construction and working of machine used to generate high voltage? 2.draw electric lines between the plates of a parallel plate capacitor with 1(air) and 2(dielectric) as a medium? 3.near the surface of earth the field is about 100V/m. why do we then not ...
Monday, June 10, 2013 at 10:46am

biology
Explain how life on earth is dependent on both polarity of covalent chemical bonds and hydrogen bonding. Reference water, proteins and nucleic acids in your answer.
Sunday, June 9, 2013 at 4:42pm

physics
The furthest distance from the Sun to Earth is df=1.521E8 The shortest distance from the Sun to Earth is ds=1.47E8 To simplify the problem, assume that the Earth's axis is always perpendicular to the plane of its trajectory around the Sun. The Sun always shines on half of ...
Sunday, June 9, 2013 at 12:17am

physics
Estimate the time difference between the longest amount of daylight in one day and the shortest amount of daylight on one day in seconds over the course of a year if you lived on the Earth's equator
Sunday, June 9, 2013 at 12:12am

Biology
Explain how life on earth is dependent on both polarity of covalent chemical bonds and hydrogen bonding.
Friday, June 7, 2013 at 7:12pm

Earth science
That is because many other sources of energy other than fossil fuels are expensive. Also, some of them are not available all the time (such as wind) and they might have other negative effects as well. Go to nationalatlas dot gov and search "energy sources" for an ...
Thursday, June 6, 2013 at 6:34pm

Earth science
Why are so few alternative sources of energy in use in the united states today??
Thursday, June 6, 2013 at 2:34pm

Earth science
In what ways do earths system interact with each other
Thursday, June 6, 2013 at 1:27pm

HELP!!! Math
The weight of an object on Earth varies directly as the weight of the same object on the moon. A 300 pound object would weight 48 pound on the moon. How muchg would a 65 pound object weigh on the moon?
Wednesday, June 5, 2013 at 6:25pm

heeeeeeeeeeeelp physics
Estimate the time difference between the longest day and the shortest day of a year in seconds if you lived on the Earth's equator with the assumptions below. Note: this is not the difference between solstices as we are adjusting the earth's rotation axis to be in the ...
Wednesday, June 5, 2013 at 4:11am

Phyics Toughest question on earth
Dude Can`t Understand Please Help
Wednesday, June 5, 2013 at 1:26am

earth science
Nothing affects nothing
Wednesday, June 5, 2013 at 12:25am

heeeeeeeeeeeelp physics vrey tough
Estimate the time difference between the longest day and the shortest day of a year in seconds if you lived on the Earth's equator with the assumptions below. Note: this is not the difference between solstices as we are adjusting the earth's rotation axis to be in the ...
Tuesday, June 4, 2013 at 7:45pm

Trigonometry
Could someone please help me out with this? I've read my text book, but can't seem to figure it out. And could you please show me how to do them? The Earth travels in a circular orbit around the Sun at 29.79 km/sec. If the radius of the orbit is 1.496 x 10^8 km, what ...
Tuesday, June 4, 2013 at 3:48pm

Phyics Toughest question on earth
Let's call the angular velocity with which the Earth rotates around its axis omega and the average angular velocity with which it rotates around the Sun, alpha. Then the average angular velocity at which the Sun moves in the sky is omega - alpha and this is equal to 2 pi/...
Tuesday, June 4, 2013 at 10:59am

Phyics Toughest question on earth
Estimate the time difference between the longest day and the shortest day of a year in seconds if you lived on the Earth's equator with the assumptions below. Note: this is not the difference between solstices as we are adjusting the earth's rotation axis to be in the ...
Tuesday, June 4, 2013 at 1:42am

To Sara: please do not multiple post the same question
There are people on earth who work with 56kb Internet connections, which means that the 3 seconds that you take to make each of the quintuple posts, it could take up to 3-4 minutes for others to just to display it. The Air America problem is a multi-step experiment, where ...
Monday, June 3, 2013 at 7:04am

s
According to science, the fastest speed possible for anything is the speed of light. The speed of light is about 186,000 miles per second. That means that in one minute, light travels 11,160,000 miles. The star nearest Earth is the Sun. It's about 93,000,000 miles from ...
Monday, June 3, 2013 at 12:12am

earth science
If a sample contains 50g of carbon14 and 50g nitrogen14 how many half lives has it undergone?
Saturday, June 1, 2013 at 3:37pm

Biology
How does the structure of Earth’s interior affect seismic waves?
Friday, May 31, 2013 at 3:10am

physics
A spaceship travels with a speed of 0.3c as it passes by the Earth on its way to a distant star, as shown in the diagram below. The pilot of the spaceship measures the length of the moving ship as 40 m. 0.3 c Earth Determine its length as measured by a person on Earth. Answer ...
Wednesday, May 29, 2013 at 12:52am

physics
I need help! i don't know how to do this problem. average atmospheric pressure at earth's surface is 1.01 x 10^5 N/m^2. Earth's radius is 6.37 x 10^6m. Show that the total weight of earth's atmosphere is about 5.15 x 10^19 N.
Tuesday, May 28, 2013 at 8:23pm

7th grade Science
1. The atmosphere of Earth is an example of a ______solution.(1point) liquid-liquid gas-liquid gas-gas** solid-liquid Am I correct?
Monday, May 27, 2013 at 10:31pm

Math
Solve for t in d(t)=25 and d(t)=0, where d(t) is given as: d(t)= -5t^2 + 10t + 20 we find that d(1)=25, and d(3.23)=0. Note: not sure if the diver was on earth. The acceleration due to gravity is only 10 instead of 32.2 f/s2 unless the distance d is in metres.
Monday, May 27, 2013 at 6:45pm

Eng
Which one of the following statements is an example of a complex sentence? A. Neap tide is the best time for digging clams. B. Sparrows as the bird feeder compete for seeds. C. The earth was spinning when Lucas firs saw Lucille. D. The crescent moon is a symbol of Islam. ...
Monday, May 27, 2013 at 1:46pm

chemistry
how much heat would be required to warm the earth's oceans by 1 degree celcius if the volume of the earths oceans is 137x100000000km3 and the density of the seawater is 1.03g/cm3
Saturday, May 25, 2013 at 6:44pm

Physics
RADIATION PRESSURE ON THE EARTH? Can comeone help with this?
Friday, May 24, 2013 at 7:57am

algebra
a. h = 50*1 - 16*1^2 = 34 Ft. b. V = Vo + g*t Tr = (V-Vo)/g = (0-50)/-32 = 1.56 s. = Rise time. Tf = Tr = 1.56 s. = Fall time. T = Tr + Tf = 1.56 + 1.56 = 3.125 s. = Time t0 return to earth. t
Thursday, May 23, 2013 at 2:41pm

PHYSICS FINAL (orbital)
The satellite's mass doesn't matter. You will need to use the fact that the Earth's radius is 6371 km. The satellite is therefore 9921 km from the Earth's center. The value of the acceleration of gravity (g') there is g' = g*(6371/9921)^2 = 4.046 m/s^2 ...
Thursday, May 23, 2013 at 2:25am

PHYSICS FINAL (orbital)
A 3300kg satellite is traveling 3550 km above the Earth's surface. Calculate the velocity and period of the satellite. THANK YOU VERY MUCH!!!!
Wednesday, May 22, 2013 at 10:44pm

PLEASE HELP FINAL PROBLEM ORBITAL
A 3300kg satellite is traveling 3550 km above the Earth's surface. Calculate the velocity and period of the satellite. THANK YOU VERY MUCH!!!!
Wednesday, May 22, 2013 at 10:44pm

PHYSICS SATELLITE PROBLEM
A 3300kg satellite is traveling 3550 km above the Earth's surface. Calculate the velocity and period of the satellite. THANK YOU VERY MUCH!!!!
Wednesday, May 22, 2013 at 9:22pm

Physics
Check units: W/m^2 = Js^(-1) m^(-2) J= N m =>W/m^2= Js^(-1)m^(-2)=Nm^(-1)s^(-1) so W/m^2/(m/s) = Nm^(-1)s^(-1)/ms^(-1) = Nm^(-2) = pressure so we have verified that the units of intensity/speed of light = units of radiation pressure therefore, the force of radiation acting ...
Wednesday, May 22, 2013 at 8:46pm

Physics
The average energy flux in the sunlight on the Earth is ⟨S⟩=1.4×103 W/m2. You might need to use some of the following constants: Distance from earth to the sun=AU=150×109m REarth=6.4×106m RSun=7.0×108m G=6.67×10−11m3/(kgs2) ...
Wednesday, May 22, 2013 at 7:24pm

Physics
We = 82kg * 9.8N/kg = 803.6 N. = Wt. on Earth. Wm = (1/6) * 803.6 = 134 N.
Tuesday, May 21, 2013 at 6:13pm

algebra
The question I have is to solve the problem. A model rocket is launched from the ground with an initial speed of 50 feet per second. The equation that models its height, h feet, off the ground t seconds after it was fired is h=-16ft^2+50t a)How high is the rocket 1 seconds ...
Tuesday, May 21, 2013 at 5:12pm

Science Help
weighs more on earth than on the moon
Tuesday, May 21, 2013 at 2:45pm

Science Help
mass = 4.5 kg Compare and contrast the mass and weight of this bowling ball on Earth and the moon.
Tuesday, May 21, 2013 at 2:31pm

Physics
Take an average 82 kg pet frog, what's it weight on earth? What is it's weight on the moon?
Monday, May 20, 2013 at 8:32pm

Life orientation
Air pollution can cause disaster It is the rise of chemical smoke to the atmosphere and that affect the ozone layer and cause ozone depletion which in turn can cause a lot of heavy rainfall and floods which can remove vegetation destroy weak housing,kill stock,injure and kill ...
Monday, May 20, 2013 at 3:55pm

Physics
The radius of planet X is 5.0 bleems. It takes 4 earth years to complete it's orbit. Another planet, Z, orbits the same sun and has an orbit with the radius of 12 bleems. How long does it take for planet Z to complete an orbit?
Saturday, May 18, 2013 at 5:09pm

Science
Explain the law of motion needed to solve thisproblem . On Planet Zorg, a 30 kg barbell can be lifted by only exerting a force fo 180N. What is the acceleration of gravity on Planet zorg? Predict how the motion of this object would change if on earth.
Saturday, May 18, 2013 at 12:39pm

physics
explain the law of motion needed to slove this problem. On Planet Zorg, a 30kg barbell can be lifted by only exerting a force of 180N. what is the acceleration of gravity on Planet Zorg? Predict how the motion of this object would change on earth.
Saturday, May 18, 2013 at 10:37am

science
in which direction are nearly all galaxies moving relative to earth
Thursday, May 16, 2013 at 5:09pm

Science
If you are talking about the moon, depending on its position in relation to sun and earth, it reflects various amounts of light, thus we have phases of the moon.
Wednesday, May 15, 2013 at 2:10pm

Science
Is the near side (facing earth)always the dark side?
Wednesday, May 15, 2013 at 12:33pm

Science 1 question SPACE
http://www.google.com/search?q=earth+to+​Uranus&hl=en&source=lnms&tbm=isch&sa=X&e​i=9vaSUa_jKKOTyQHDgoHwCw&ved=0CAcQ_AUoAQ​&biw=711&bih=453 http://www.google.com/search?q=earth+to+​Uranus&hl=en&source=lnms&tbm=isch&sa=X&e​i=9vaSUa_jKKOTyQHDgoHwCw&...
Tuesday, May 14, 2013 at 10:47pm

physics
This question begs for correction, as it is based on faulty reasoning. The centripetal force is about the center of rotation, not the center of the earth. When a mass is placed in orbit, take the moon for instance, both the moon and the Earth rotate about the center of ...
Tuesday, May 14, 2013 at 10:08pm

physics
thus far in the course we have ignored that on the earths surface an object must have a slightly unbalanced force to rotate with the earth, pretending that the normal force precisely balances the objects weight. A student with a mass of 65.0kg stands at the equator. The radius...
Tuesday, May 14, 2013 at 8:05pm

physics
the space shuttle typically orbits 400 km above the earths surface. The earth has a mass of 5.98 * 10^24 kg and a radius of 6380km. A) How much would a 2000 kg part for the space station weigh when it has been lifted to that orbit in the shuttles cargo bay? B)Use your result ...
Tuesday, May 14, 2013 at 7:54pm

chem
1. The total power used by humans worldwide is approximately 15 TW (terawatts). Sunlight striking the Earth provides 1.336 kW per square meter (assuming no clouds). The surface area of Earth is approximately 197,000,000 square miles. How much of Earth’s surface would we ...
Tuesday, May 14, 2013 at 3:48pm

How far of the Taurus form Earth?
kill the black
Tuesday, May 14, 2013 at 3:02pm

Physics to Elena
At the upper surface of the earth's atmosphere, the time-averaged magnitude of the Poynting vector is referred to as the solar constant and is given by </S/>=1.35×103W⋅mͨ​2;2 . (a) If you assume that the sun's electromagnetic radiation is a ...
Tuesday, May 14, 2013 at 4:38am

Physics
At the upper surface of the earth's atmosphere, the time-averaged magnitude of the Poynting vector is referred to as the solar constant and is given by </S/>=1.35×103W⋅mͨ​2;2 . (a) If you assume that the sun's electromagnetic radiation is a ...
Monday, May 13, 2013 at 6:20am

Symbolic Logic
Even if you know only some of them please help! 1. Give a proof of the following: (∀F)( (P)( [ιxGx][Px] ⊃ F(P) ) ⊃ F(G)) (∃F)( (P)( F(P) ≡ [ιxGx][Px]) Therefore, E!(ιxGx) 2. Prove the following: [ιxMx][Thales believed that Bx...
Sunday, May 12, 2013 at 11:26pm

English - Poetry
Here is a copy of the poem: My children play with skulls for their classrooms are guarded by warlocks who scream at walls collapsing into paper toilets plump witches mouth ancient curses in an untaught tongue test children upon their meaning assign grades in a holocaust ...
Friday, May 10, 2013 at 4:11pm

physics
What is the radius of a communications satellite’s orbital path that is in a uniform circular orbit around Earth and has a period of exactly 24.0 hours (86,400 seconds). (Measurement is from the center of Earth.)
Thursday, May 9, 2013 at 3:28pm

physics
Earthquakes are motions of the earth's crust. Essentially, they are big sound waves that travel through the earth. There are two types of waves. The first type is called a longitudinal or P wave, where the earth compresses in the same direction as the wave travels. The ...
Thursday, May 9, 2013 at 2:55am

Physics
At the upper surface of the earth's atmosphere, the time-averaged magnitude of the Poynting vector is referred to as the solar constant and is given by </S/>=1.35×103W⋅mͨ​2;2 . (a) If you assume that the sun's electromagnetic radiation is a ...
Wednesday, May 8, 2013 at 4:08pm

Science help please, thanks!
(Moon gravitational force on Earth) = (Earth gravitational force on Moon) Your weight on a scale = scale's upward force on your feet.
Wednesday, May 8, 2013 at 6:32am

physics
Two stars are 2.4 × 1011 m apart and are equally distant from the earth. A telescope has an objective lens with a diameter of 1.72 m and just detects these stars as separate objects. Assume that light of wavelength 590 nm is being observed. Also, assume that diffraction ...
Tuesday, May 7, 2013 at 7:37pm

SCIENCE
12 kg is a mass, not a weight. The mass will stay the same on Earth and Moon. If you are talking about kilograms as a weight unit, which is seldom done and not advised in physics, the answer would be about 72 kg WEIGHT, on Earth.
Tuesday, May 7, 2013 at 1:30pm

SCIENCE
IF SOMEONE WHEIGHS 12 KG ON THE MOON SO HOW MUCH HE WILL WEIGH ON THE EARTH
Tuesday, May 7, 2013 at 11:04am

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