Sunday

April 20, 2014

April 20, 2014

Number of results: 8,852

**Physics**

a) If the period on planet X is 2T, the acceleration of gravity (g) at the surface is 4 times less than Earth's, because Period = 2 pi sqrt(L/g) Since g = GM/R^2, if g is 1/4 as large as Earth's, and R is half the Earth's radius, M is 1/16 of Earth's. g(X) = g(earth)*[M(X)/M(...
*Sunday, May 15, 2011 at 11:10pm by drwls*

**physics**

Huh? g is not 9.8 on Earth. the acceleration at Earth's surface is 9.8m/s^2. The gravitational field at Earth is 9.8N/kg Why that number? The mass of the Earth, and the diameter of Earth determine it. g=G*MassEarth/radiusEarth^2
*Thursday, May 6, 2010 at 10:13pm by bobpursley*

**physics**

Find the distance (measured in earth radii, RE) from the center of the earth to a point outside the earth where the acceleration of gravity due to the earth is exactly one ninth of its value on the surface of the earth.
*Saturday, April 24, 2010 at 8:16pm by Muhammad*

**physics**

Get the velocity of the earth in its orbit from V = (2 pi R)/P P is the orbital period, which is one year converted to seconds. R is the Earth's orbital radius. The centripetal acceleration of the Earth is a = V^2/R. The force exerted on the Earth by the sun is Me * a where Me...
*Tuesday, April 27, 2010 at 3:37pm by drwls*

**Physics**

At the heighest point on earth, the distance to the center of the earth is approximately equal to 1.0014 times the radius of the earth. What would be in N/kg the magnitude of the gravitational field (g) due to the earth at that position? Assume 9.8 N/kg for g at the surface of...
*Tuesday, September 6, 2011 at 11:58pm by Hannah*

**physics**

What is the distance from the Earth's center to a point outside the Earth where the gravitational acceleration due to the Earth is 1/22 of its value at the Earth's surface? _ m
*Friday, December 18, 2009 at 9:54pm by asia*

**physics**

What is the distance from the Earth's center to a point outside the Earth where the gravitational acceleration due to the Earth is 1/45 of its value at the Earth's surface?
*Monday, February 22, 2010 at 7:47pm by Anonymous*

**phy**

What is the distance from the Earth's center to a point outside the Earth where the gravitational acceleration due to the Earth is 1/12 of its value at the Earth's surface?
*Friday, September 17, 2010 at 6:33pm by ami*

**Physics**

What is the distance from the Earth's center to a point outside the Earth where the gravitational acceleration due to the Earth is 1/20 of its value at the Earth's surface?
*Sunday, October 3, 2010 at 7:48pm by Eden*

**physics**

As you walked on the moon, the earth’s gravity would still pull on you weakly and you would still have an earth weight. How large would that earth weight be, compared to your earth weight on the earth’s surface? (Note: The earth’s radius is 6378 km and the distance separating ...
*Thursday, March 31, 2011 at 10:44pm by olga*

**colllege physics**

What is the distance from the Earth's center to a point outside the Earth where the gravitational acceleration due to the Earth is 1/45 of its value at the Earth's surface?
*Monday, February 22, 2010 at 4:47pm by Anonymous*

**Astro**

What is the distance in meters from the Earth's center to a point out-side the Earth where the gravitational acceleration due to the Earth is 1/20 of its value at the Earth's surface?
*Friday, October 2, 2009 at 1:06pm by Ryrya*

**Algebra**

The gravitational force between an object & the Earth is inversely proportional to the square of the distance from the object to the center of the Earth. If an astronaut weighs 210 lbs on the surface of the Earth, what will he weigh 100 miles above the Earth? Assume that the ...
*Friday, April 29, 2011 at 5:56pm by Crystal*

**Physics**

When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? The distribution of mass in the earth is spherically symmetric. The density of the earth is the same everywhere. The earth's interior is solid everywhere...
*Friday, January 25, 2013 at 4:14pm by arcos15*

**Physics**

When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? -The distribution of mass in the earth is spherically symmetric. -The density of the earth is the same everywhere. -The earth's interior is solid ...
*Friday, January 25, 2013 at 4:15pm by arcos15*

**math**

The mean radius of the Earth is 6.37 x 106 meters (m). Assuming the earth can be modeled as a perfect sphere a. In cubic meters (m3 ) what is the volume of the Earth? b. In meters (m) what is Earth’s circumference? c. If the mean density is 5.515g/cm3, what is the Earth’s mass...
*Monday, February 21, 2011 at 12:18pm by Rocio Aguilera*

**Physics HELLLPPPP**

When we say that the weight of an object is Mg, and that g = 9.8 N/kg, what assumptions are we making? Which of the below? -The distribution of mass in the earth is spherically symmetric. -The density of the earth is the same everywhere. -The earth's interior is solid ...
*Friday, January 25, 2013 at 4:16pm by NATTT*

**Science**

Luis wanted to create a clay model of earth and the sun. To show how Earth rotates, Luis wants to use a toothpick to represent Earth's axis of rotation. Where should Luis place the toothpick? A. Horizontally through Earth in the direction Earth is traveling B. Vertically ...
*Wednesday, November 20, 2013 at 8:27pm by Anna*

**earth**

A particle weighs 120 N on the surface of the earth. At what height above the earth's surface will its weight be 30 N? Radius of the earth = 6,400 km.
*Thursday, May 31, 2012 at 11:31am by Anonymous*

**AP Physics B**

Hmmm. If it is 2 earth radii from the EArth, that means comparing g at the surface of earth (1 earth radi) to "g" at 3 earth radi is 1/9 gsurface So the gravitaional force field is g=1/9*9.8N/kg force on spacecraft= mass* 1/9*9.8 N/kg =1400kg*1.09N/kg=not your answer. Your ...
*Friday, September 11, 2009 at 7:56pm by bobpursley*

**earth**

Compared with the strength of Earth's gravity at its surface, how much weaker is gravity at a distance of 11 Earth radii from Earth's center?
*Thursday, September 29, 2011 at 12:14pm by chris*

**earth science**

The earth's differentiation and size were significant factors for life on Earth because Earth's composition and gravitational attraction _____. a.keep the moon and sun in orbit b.keep people grounded c.helped to create and retain Earth's atmosphere d.create and retain ...
*Thursday, November 29, 2007 at 11:31pm by kelly*

**physics entry **

A meteor headed straight towards the earth has an approach speed of 2.00e3 m/s at a distance of 7 earth radii from the center of the earth. What will be its speed when it reaches earth a 6.38e6 m(ignore the effects of atmosphere)?
*Tuesday, November 17, 2009 at 6:02pm by Andy *

**earth**

since it weighs 1/9 its original weight, and F = GMm/r^2 and the masses involved have not changed, that means that r^2 has grown by a factor of 9. So, the satellite is 3 earth radii away from earth center, or 2 earth radii high.
*Thursday, April 12, 2012 at 10:44pm by Steve*

**physics**

Which of the following best describes the strength of the gravitational force on Earth due to your mass? A) It is zero as long as you are standing on Earth’s surface. B) It is much greater than Earth’s gravitational force on you because Earth’s mass is so great. C) It is equal...
*Tuesday, May 15, 2012 at 6:46pm by blue ivy*

**physics**

What is the acceleration due to gravity at a distance of 1.2 Earth radii above Earth�s surface? Use M_{Earth} = 5.972 x 10^{24} kilograms and r_{Earth} = 6370 km a_{gravity} =______________{m}{s^2}
*Monday, March 3, 2014 at 2:54pm by Melissa*

**math**

What is the acceleration due to gravity at a distance of 1.2 Earth radii above Earth�s surface? Use M_{Earth} = 5.972 x 10^{24} kilograms and r_{Earth} = 6370 km a_{gravity} =______________{m}{s^2}
*Monday, March 3, 2014 at 2:55pm by Melissa*

**English**

What makes our earth sick? - Steel cans make the earth sick. - Shampoo makes the earth sick. - Empty bottles make the earth sick. - Plastic bags make the earth sick. - ___________ make/makes the earth sick. (Are the answers all grammatical? What other expressions can we use in...
*Tuesday, November 17, 2009 at 3:29pm by rfvv*

**earth**

The Earth orbits the Sun once every 365 days. The distance between the Earth and the Sun is 1.5 x 1011 m. What is the average orbital velocity of the Earth as it travels around the Sun?
*Sunday, November 21, 2010 at 8:10pm by Anonymous*

**physics**

Find the speed of a satellite in a circular orbit around the earth with a radius 2.69 times the mean radius of the earth; Radius Earth= 6.37E+3km; Mass Earth= 5.98E+24kg.
*Tuesday, March 11, 2014 at 7:51pm by Marie*

**physics**

calculate the centripetal acceleration of the earth in its orbit around the sun and the net force exerted on the earth. What exerts this force on the earth? Assume that the earth's orbit is a circle of radius 1.50x10^11m. (earth's mass= 5.98x10^29kg, Sun's mass= 1.99x10^30kg)
*Tuesday, April 27, 2010 at 3:37pm by krista*

**science**

A distant spaceship carrying a red headlight, emitting light with wavelength 600nm, is heading towards the earth. Observers on the earth detect the light from the headlight as ultraviolet light with wavelength 200nm. What is the velocity of the spaceship? b) As the space ship ...
*Sunday, March 9, 2014 at 12:44pm by Relativity quest. help pls*

**earth-physics**

The Earth has an angular speed of 7.272 10-5 rad/s in its rotation. Find the new angular speed if an asteroid (m = 1.07 1022 kg) hits the Earth while traveling at a speed of 1.30 103 m/s (assume the asteroid is a point mass compared to the radius of the Earth) in each of the ...
*Sunday, February 26, 2012 at 7:35pm by huiol*

**math**

F = G * Mass earth * Mass object /radius of earth^2 The earth pulls the object exactly as hard toward the center of the earth as the object pulls earth toward the object. Neither accelerates as a result because if the object is on earth it is pushing down on the surface and ...
*Sunday, March 28, 2010 at 5:57pm by Damon*

**science**

The pull of gravity keeps the Moon in orbit around Earth. The distance between the Earth and Moon is about 380,000 kilometers. A crew of astronauts leaves Earth on a Monday and lands on the Moon on a Thursday. They land on the side of the Moon facing away from the Earth. On ...
*Thursday, February 2, 2012 at 6:05pm by Bryan*

**earth**

a space traveller determines the radius of a planet to be half of earth . After landing on its surface , he finds the acceleration due to gravity to be twice of that of surface of earth. Find the ratio of mass of planet to the earth
*Wednesday, September 19, 2012 at 5:53am by hanu*

**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 by Mia*

**English**

1. What makes our earth sick? Gases from cars make the earth sick. Paper cups make the earth sick. _________ make(s) the earth sick. _________ make(s) the earth sick. (Would you name what makes the earth sick? The more,the better. The things suitable for the subject? Thank you.)
*Tuesday, November 10, 2009 at 12:41am by rfvv*

**phy.**

check my understanding please. Larry weighs 300 N at the surface of the earth. what is the weight of the earth in the gravitational field of Larry? -would it still be 300 N an astronaugt lands on a planet that has twice the mass as earth and twice the diameter. how does the ...
*Tuesday, October 16, 2007 at 8:34pm by Julie*

**physics**

g = (G*M)/r² Where G is The gravitational constant, M is the mass of earth, and r is the distance from the center of the earth. Given this formula, you should be able to calculate the distance (for data about earth's mass and radius, search wikipedia for "Earth" and look in ...
*Thursday, December 11, 2008 at 8:07pm by Christiaan*

**physics**

When a spacecraft travels from Earth to the Moon, the gravitational force from Earth initially opposes this journey. Eventually, the spacecraft reaches a point where the Moon's gravitational attraction overcomes the Earth's gravity. How far from Earth must the spacecraft be ...
*Thursday, October 4, 2012 at 10:17pm by Garcia*

**physics**

A child learns in school that the earth is traveling faster than 100,000 kilometers per hour around the sun, and in a frightened tone asks why we arent swept off. What statement about the motion of the Earth is, on average,true? A. We are traveling slower than the Earth B. We ...
*Tuesday, July 12, 2011 at 12:33pm by alexa*

**Earth Space (In desperate need)**

Just FYI, earth's rotation on its axis causes day/night, not the seasons. The earth's axis tilts from being perpendicular to the plane of the ecliptic, and that is what causes the seasons. (The orbit of earth is very very close to circular, so earth's revolution about the sun ...
*Thursday, August 15, 2013 at 4:07pm by Steve*

**physics**

sqrt (1/4)=1/2 so wouldn't it be one radius of earth above earth (doubling distance from center of Earth).
*Tuesday, April 19, 2011 at 9:44pm by bobpursley*

**earth**

if you are in a spacecraft moving away from earth, how would your weight change as your distance from earth increases?
*Tuesday, May 31, 2011 at 6:26pm by deanna*

**science**

The earth rotates on its axis. As the earth turns, the sun irradiates the approximately half of the earth's surface exposed to it.
*Monday, November 17, 2008 at 4:28pm by DrBob222*

**earth**

how far should a man go from the centre of the earth such that his weight is 1\4th of that on the earth?radius=6400km.
*Wednesday, October 20, 2010 at 9:17am by jahnvi*

**environmental science**

The earth's differentiation and size were significant factors for life on Earth because Earth's composition and gravitational attraction
*Tuesday, December 28, 2010 at 6:53pm by Anonymous*

**Physics**

When the space shuttle (mass of the shuttle = 2 x10^6 kg) was at the outer limit of Earth's atmosphere (distance = 350 km above Earth's surface), astronauts measured the gravitational force from Earth to be equal to 1.7 x 10^7 newtons. Assuming that both Earth and the shuttle ...
*Sunday, May 20, 2012 at 4:29pm by Leila*

**Physics**

The Earth has an electric field with magnitude roughly 100 N/C at its surface. A) Assuming there is a point charge at the earth's center creating this field, how much charge does the earth posses? Treat the earth as a sphere of radius 6.37 * 10^6 m. B)As the earth orbits the ...
*Thursday, March 6, 2008 at 7:54pm by jenish*

**physics**

Assuming the Earth's magnetic field averages about 0.50×10−4 T near Earth's surface, estimate the total energy stored in this field in the first 15km above Earth's surface. The radius of Earth is 6380 km.
*Sunday, March 23, 2014 at 8:15pm by Jennifer*

**physics**

A boulder weighs 800N at the surface of the earth. What would be its weight at a distance of three earth's radii from the center of the earth?
*Wednesday, July 7, 2010 at 11:43pm by weng*

**physics**

A boulder weighs 800N at the surface of the earth. What would be its weight at a distance of three earth's radii from the center of the earth?
*Thursday, July 8, 2010 at 2:00am by weng*

**earth science**

describe a possible pathway of carbon through the four spheres of the earth.Identifty what each the fourspheres of the earth contains
*Sunday, February 13, 2011 at 11:08pm by jason*

**physics**

Calculate the force of gravity on a 12 kg mass if it were 6.4 106 m above Earth's surface (that is, if it were 2 Earth radii from Earth's center.)
*Monday, January 24, 2011 at 11:05am by Anonymous*

**physics**

Calculate the force of gravity on a 12 kg mass if it were 6.4 106 m above Earth's surface (that is, if it were 2 Earth radii from Earth's center.)
*Monday, January 24, 2011 at 11:06am by taylor*

**physics**

Calculate the force of gravity on a 10 kg mass if it were 6.4x10^6 m above Earth's surface (that is, if it were 2 Earth radii from Earth's center.)
*Thursday, January 26, 2012 at 9:41pm by ginger*

**Physics HELP!!**

What is the acceleration due to gravity at 7220km above the Earth's surface? Take the radius of the Earth to be 6.37e6m and the mass of the Earth to be 5.972e24kg.
*Tuesday, October 16, 2012 at 11:22am by LS*

**physics-mechanics**

A 1.0 kg mass weighs 9.8 N on Earth's surface, and the radius of Earth is roughly 6.4 x 10^6 m. Calculate the average density of Earth
*Thursday, December 27, 2012 at 7:09pm by Rebecca*

**Math**

The gravitational acceleration, g, on the Earth is proportional to the mass, M, of the Earth and inversely proportional to the square of the distance, r, from the Earth's center. If the gravitational acceleration on the center of the Earth is 9.8 m/s^2, what is the ...
*Monday, April 1, 2013 at 1:51pm by Lorie*

**Physics HELLLPPPP**

-The distribution of mass in the earth is spherically symmetric. Yes, if all the mass were under Paris, g would be very high there. -The density of the earth is the same everywhere. No, all the mass could be at the center -The earth's interior is solid everywhere. No, again ...
*Friday, January 25, 2013 at 4:16pm by Damon*

**principles of physics**

If the Earth had two identical moons in one circular orbit, and the moons were as far apart in that orbit as they could be, the center of gravity of the Earth-moons system would beA) at the center of the Earth.B) outside the Earth, but beyond the orbital path of the moons.C) ...
*Friday, March 2, 2012 at 11:27am by CHRIS*

**physics**

If the Earth had two identical moons in one circular orbit, and the moons were as far apart in that orbit as they could be, the center of gravity of the Earth-moons system would beA) at the center of the Earth.B) outside the Earth, but beyond the orbital path of the moons.C) ...
*Saturday, March 3, 2012 at 3:59pm by Mrs G*

**science **

A person who weighs 600 newtons on Earth would weigh only 100 newtons on the Moon. Which statement best explains why? A.The circumference of Earth is larger than that of the Moon. B.The density of Earth is greater than that of the Moon. C.The mass of Earth is greater than that...
*Monday, February 17, 2014 at 4:43pm by victoria *

**geometry**

The Hubble Space Telescope is orbiting Earth 600 km above Earth's surface. Earth's radius is about 6370 km. Use the Pythagorean Theorem to find he distance a from the telescope to Earth's horizon. Round your answer to the nearest ten kilometers.
*Tuesday, December 9, 2008 at 10:28pm by sarah*

**Physics**

Escape velocity from the surface of earth depends upon mass of the earth and radius of the earth. Find the realtion between these quantities dimensionely.
*Sunday, April 5, 2009 at 8:47am by Akash*

**science**

How far away from the earth does acceleration due to gravity become 1% of its value at the earth's surface. Assume that the earth is a sphere of radius 638000000cm.
*Friday, September 30, 2011 at 11:48am by Derrick*

**Physics**

Compute the angular momentum of the earth arising from the following motions. (a) Earth's orbital motion around the sun. (b) Earth's rotation on its axis.
*Monday, October 22, 2012 at 4:03pm by Pat*

**Physics**

What you have here is a three-body problem. You cannot use Kepler's law to solve it. It turns out that there is a point of unstable equilbrium between the earth and the moon where the gravity forces cancel and the satellite will remain at equilbrium at that location and ...
*Saturday, May 7, 2011 at 3:23pm by drwls*

**college**

Calculate the force of Earth's gravity on a spacecraft 12,800 km (2 Earth radii) above the Earth's surface if its mass is 1550 kg.
*Monday, February 22, 2010 at 11:06am by Anonymous*

**Physics**

When a spacecraft travels from the Earth to the Moon, both the Earth and the Moon exert a gravitational force on the spacecraft. Eventually, the spacecraft reaches a point where the Moon's gravitational attraction overcomes the Earth's gravity. How far from the Earth's surface...
*Saturday, October 13, 2012 at 4:00pm by Sam*

**calculus problem**

Suppose and object is traveling directly from the earth to moon. The mass of the earth is 5.9742 x10^24 kg, the mass of the moon is 7.349 x 10^22 kg, and the mean distance from the earth to the moon is 384,000km. For an object between the earth and the moon, how far from earth...
*Wednesday, October 27, 2010 at 7:37am by Kim*

**Physics**

Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1600 kg. Hint: At three earth radii from the surface of the Earth, the gravity force (weight) of the spacecraft will be reduced to (1/4)^2 = 1/16 of the weight when...
*Sunday, January 7, 2007 at 11:43pm by Scotty*

**physics**

The auroral zone is defined by the last field line from the Earth that returns to the Earth. If the field of the earth extends no further than 10RE in the sunward direction, at what angle (in degrees) in the picture above does the last field line that returns to the earth on ...
*Wednesday, April 10, 2013 at 3:36pm by Ruben *

**Physics**

A projectile is fired vertically from Earth's surface with an initial speed v0. Neglecting air drag, how far above the surface of Earth will it go? (Use any variable or symbol stated above along with the following as necessary: ME for the mass of the Earth, rE for the radius ...
*Thursday, April 11, 2013 at 11:15pm by Rachel*

**puzzles**

does this puzzle mean "down to earth" ------------- this is a box [ ] [ ] [ ] [ earth earth ] -------------
*Monday, April 13, 2009 at 5:19pm by Delaney*

**earth science**

What are two lines of evidence that indicate that earth is rotating? What is the motion of the stars at night? What does the Sun do in the day? i want to seach features of the earth in its inner structure
*Wednesday, August 30, 2006 at 12:31pm by steph*

**Earth Science**

Earth is always changing. What are two forces that cause the earth's surface to constantly change and what are their effects on the planet? Please answer within a few minutes.
*Wednesday, November 4, 2009 at 1:08pm by Elizabeth*

**physics**

A satellite of mass m in a circular orbit at a height of 400Km above the earth's surface. What is the Radius of the Earth (given: 6.35 * 10^6) with respect to the center C of the Earth?
*Saturday, April 23, 2011 at 11:41am by Lisa*

**physics**

The gravitational force on Jessica is pulling her toward the center of the earth. That force is resisted by the equal and opposite force the ground exerts up on the rollers. The gravitational force on earth is pulling the earth toward Jessica. However is is balanced by the ...
*Friday, January 1, 2010 at 5:38pm by Damon*

**Physics**

The Earth has an angular speed of 7.272·10-5 rad/s in its rotation. Find the new angular speed if an asteroid (m = 3.45·1022 kg) hits the Earth while traveling at a speed of 4.41·103 m/s (assume the asteroid is a point mass compared to the radius of the Earth) in each of the ...
*Thursday, November 8, 2012 at 4:39pm by Joe Frank*

**physics- please help me!**

Earth turns on its axis approximately once every 24 hours. The radius of Earth is 6.38 X 10^6 m. a.) If some astronomical catastrophe suddenly brought Earth to a screeching halt (a physical impossibility as far as we know), with what speed would Earth's inhabitants who live at...
*Tuesday, December 9, 2008 at 5:54pm by rory*

**Physics**

A 1.0kg mass weighs 9.8 Newton on earth's surface, and the radius of Earth is roughly 6.4 x 10 to the power of 6. The mass of the earth is 6.02 x 10 to the power of 24. Calculate the average density of Earth?
*Monday, December 24, 2012 at 11:33am by Rebecca*

**physics/math**

Calculate the magnitude of the gravitational force between the Earth and an m = 6.00 kg mass on the surface of the Earth. The distance to the center of the Earth from the surface is 6.37×103 km and the mass of the Earth is 5.98×1024 kg.
*Friday, March 22, 2013 at 2:25pm by HP*

**earth**

The force of earth's gravity on you is proportional to 1/distance^2 Therefore it never,ever, goes away. It just gets smaller and smaller. If you go 1 earth radius up, you will be twice as far from earth center as you are here and it will be mg/4 If you get 5 earth radii from ...
*Monday, April 19, 2010 at 4:35pm by Damon*

**Physical Science**

Here's a question from my homework that I have no idea where to even beging with it. A European "weighs" 100 kg on Earth. a. What is his mass on Earth? b. What is his weight on Earth? c. What is his mass on the moon where the acceleration due to gravity is 1/6 that of the ...
*Thursday, October 4, 2007 at 1:17pm by Beth*

**Physics**

A spaceship is launched from the Earth's surface with a speed v. The radius of the Earth is R. What will its speed be when it is very far from the Earth? (Use any variable or symbol stated above along with the following as necessary: G for the gravitational constant, m for the...
*Wednesday, November 3, 2010 at 7:07pm by Donny*

**Physics**

A spaceship is launched from the Earth's surface with a speed v. The radius of the Earth is R. What will its speed be when it is very far from the Earth? (Use any variable or symbol stated above along with the following as necessary: G for the gravitational constant, m for the...
*Thursday, November 4, 2010 at 7:11pm by Oscar*

**gravity**

A spaceship is launched from the Earth's surface with a speed v. The radius of the Earth is R. What will its speed be when it is very far from the Earth? (Use any variable or symbol stated above along with the following as necessary: G for the gravitational constant, m for the...
*Friday, November 5, 2010 at 10:36pm by Anonymous*

**astronomy**

6. Suppose that you travel to a planet that has 4 times the Earth’s mass and 4 times the Earth’s radius. Calculate how much more or less you would weigh on this planet compared to your weight on Earth. Express your answer as a factor or fraction of your weight on Earth.
*Sunday, October 16, 2011 at 10:03pm by Anonymous*

**physics**

Explain with diagram the variation of the acceleration due to gravity (g) i) At a height h above the earth surface Inside the earth towards the centre of the earth. ii) What is the value of g at the centre of the earth. 2)Explain with example the term, damped harmonic motion 3...
*Wednesday, July 30, 2008 at 6:33am by GoodMatrix*

**Astronomy**

We cannot draw figures for you. Start by drawing four circles around the sun, of appropriate scaled radii. Those will be the orbits of Merciry, Venus, Earth and Mars. Put the Earth (arbitrarily) to the right of the sun. Add another small circle around the Earth representing ...
*Thursday, February 2, 2012 at 11:55pm by drwls*

**geometry**

There is a right trangle formed by points at the center of the Earth, the HST satellite and the point where a line from the satellite is tangent to the Earth. The hypotenuse (c) goes from the HST to the center of the Earth, and its length is 600 + 6370= 6970 km. The side that ...
*Tuesday, December 9, 2008 at 10:28pm by drwls*

**Physics**

The Earth is surrounded by an electric field on its surface that points toward the center of the Earth with an average magnitude of 150 N/C. If there is an electron that is released in vacuum at the Earth’s surface, what will the acceleration due to the Earth’s electric field ...
*Monday, August 10, 2009 at 10:10pm by Sammy*

**math**

Calculate the speed of an artificial earth satellite, assuming that it is travelling at an altitude h of 140 Km above the surface of the earth where g=9.8m/s2. The radius of earth R is 6373Km.
*Monday, August 2, 2010 at 11:57pm by alobi*

**Pearson**

Calculate the acceleration due to the rotation of the Earth of a person in a location 22° northern geographical latitude. Use R Earth = 3,680 km for the value of the radius of the Earth.
*Thursday, November 4, 2010 at 8:51pm by Crystal*

**Earth's Heat Sources**

most of earth's landmass is in the northern hemisphere. how might this influence Earth's overall albedo during a)June b)January I really dont get this question.
*Tuesday, December 7, 2010 at 9:37pm by Sydney*

**Earth's Heat Resources**

most of earth's landmass is in the northern hemisphere. how might this influence Earth's overall albedo during a)June b)January I really dont get this question.
*Wednesday, December 8, 2010 at 10:22am by Sydney*

**Physics**

Compute the angular momentum of the earth arising from the following motions. (a) Earth's orbital motion around the sun. (b) Earth's rotation on its axis. Can someone please help me with this question? Thanks
*Friday, March 18, 2011 at 6:46pm by Anonymous*

**AP environmental Science**

What formula would i use to solve: If the earth has an annual growth rate of 1.2% how many people are added to the earth each year? what will be the population of earth in 2050? thanks, any help is appreciated!! :D
*Sunday, October 16, 2011 at 10:17pm by Nicole*

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