Saturday
May 18, 2013

# Homework Help: Science: Earth

physics
If a man weighs 853.0 N on Earth, what would he weigh on Jupiter where the acceleration due to gravity is 25.4 m/s2?
Wednesday, October 27, 2010 at 12:57pm

Earth/Environmental Science
_______ currents are currents that involve warm water flowing in different directions at different speeds close to the top of oceans.
Wednesday, October 27, 2010 at 10:45am

3rd homework
the water cycle! lesson I water on earth type of water 1. ? where found 2. ? 3 ? 4 ? uses 5. ? 6. ? 7. ? 8. ? where found 9. ? 10. ? 11. ? uses 12. ? 13. ? 14. ? 15. where salt and fresh water meet is called an ? please help with the ?'s. I have no idea what to fill in. :-(
Wednesday, October 27, 2010 at 5:15am

physics
A woman has a mass of 42.9 kg. What is her weight on earth? and what is her weight on the moon, where g=1.17 m/s2
Tuesday, October 26, 2010 at 11:28pm

Physics
The first stage of a space vehicle consumed fuel and oxidizer at the rate of 1.60 multiplied by 104 kg/s, with an exhaust speed of 2.55 multiplied by 103 m/s. (a) Calculate the thrust produced by these engines. answer should be in N (b) Find the acceleration of the vehicle ...
Tuesday, October 26, 2010 at 7:25pm

chemistry
Lead is often found in Earth's crust as several lead compounds. Calculate the mass in kilograms of the amount of each of the following lead compounds that contains 4500kg of lead. 1)PbCO3 (cerussite) 2) PbSO4(anglesite)
Tuesday, October 26, 2010 at 6:13pm

physics
Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 330 million kilometers and take 3.0 Earth years to orbit about a point midway between them. What is the mass of each?
Tuesday, October 26, 2010 at 12:40pm

Earth/Environmental Science
"Tsunamis" are giant waves caused bhy earthquakes under the ocean floor. They _______ islands and coastlines. What does tsunamis do to islands and coastlines?
Tuesday, October 26, 2010 at 10:55am

physics
How long would it take for the Earth to complete a full turn if a person at 56.4° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,385 km for the radius of Earth.
Monday, October 25, 2010 at 8:36pm

Physics
When a falling meteor is at a distance above the Earth's surface of 3.34 times the Earth's radius, what is its free-fall acceleration due to the gravitational force exerted on it?
Monday, October 25, 2010 at 4:21pm

science
A 75 kg person and a 200 kg crate are each parachuted to earth from a plane. Which statement is correct? a. the crate will reach terminal velocity last, but hit the ground first b. the person will reach terminal velocity last, but hit the ground first. c. the person and crate ...
Monday, October 25, 2010 at 2:53pm

physical science
A 100 kg ball of lead rests next to a 10 kg rock. Which statement below is true? a. the lead ball and the rock have equal amounts of inertia b. if the lead ball and the rock fell from the same height in a vacuum, the rock would hit the ground first because it is less massive. ...
Monday, October 25, 2010 at 2:43pm

space
Stars near the ______ should show the greatest Doppler shifts due to the earth's revolution. Why? Would it be stars near the ecliptic because it deals with the earth revolving and having motion.
Monday, October 25, 2010 at 12:00am

Physics
For some reason I keep getting this problem wrong. Please Help! A helicopter is ascending vertically with a speed of 9.00 m/s. At a height of 90 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
Sunday, October 24, 2010 at 10:18pm

Physics
A. Use the relation 2 m m m GM g R ƒ­ to find the acceleration due to gravity on the surface of the Moon. You can use the following data: Mass of the Moon m M = 7.35 ¡Ñ 1022 kg. Radius of the Moon m R = 1.74 ¡Ñ 106 m. B. How does this value ...
Sunday, October 24, 2010 at 9:44pm

AP Physics
An object has a mass of 80 kg on earth. the acceleration of gravity on Mars is about 1/4 of the acceleration of gravity on Earth. What is the weight of the object on Mars?
Sunday, October 24, 2010 at 7:45pm

astronomy
Fill in the blank: The Earth may have gained its water and volatile gases from collisions with _______ .
Sunday, October 24, 2010 at 7:14pm

physics
A military helicopter on a training mission is flying horizontally at a speed of 70.0 m/s and accidentally drops a bomb (fortunately not armed) at an elevation of 320 m. You can ignore air resistance. (a) How much time is required for the bomb to reach the earth? (b) How far ...
Sunday, October 24, 2010 at 5:34pm

Physics
A helicopter is ascending vertically with a speed of 9.00 m/s. At a height of 90 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
Sunday, October 24, 2010 at 2:47pm

Chemistry
5. The elements are related by properties in groups.- F? 7. In Earth's environment, hydrogen is a metal.- T? Thanks -MC
Sunday, October 24, 2010 at 1:50pm

What are some symbols in 'a journey to the center of the earth' by jules verne
Sunday, October 24, 2010 at 1:31pm

Helth science
True or False: Laid end to end, the blood vessels in your body would circle the Earth two and a half times. 2. The _________ is made up of cardiac muscle.
Sunday, October 24, 2010 at 12:27pm

Earth science
What is a relief map?
Sunday, October 24, 2010 at 12:24pm

physics
an object of 3 kg is dropped from 2m above the ground. it takes a time interval of tE to reach the ground of the earth. if it is dropped on the moon, how long does it take to reach the ground? the a dure to g on the moon is 1/6 of that on the earth.
Sunday, October 24, 2010 at 11:50am

physic
golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.5 times as far as he would have on earth, given the same velocities on both planets. The ball is launched at a speed of 54 m/s at an angle of 60¡ã above the horizontal. When the ...
Sunday, October 24, 2010 at 2:27am

Physics
What equations should I use to calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 5800 km above the earth's surface?
Saturday, October 23, 2010 at 6:18pm

earth science
state how the sun generates the energy that it radiates away as its luminosity.
Friday, October 22, 2010 at 10:32pm

science
Name some ways the wind and rain change the Earth's top layer(soil).tell why?
Friday, October 22, 2010 at 6:26pm

Chemistry
A new element, Canadium, not found on earth, contains 3 isotopes. given the following information, calculate the atomic mass of Canadium. Isotope Mass (amu) % abundance 1 429.633 21.29 2 429.121 42.47 3 429.398 ?
Friday, October 22, 2010 at 1:38pm

physics
a satelitee breaks in half while in circular orbit about the earth
Thursday, October 21, 2010 at 10:16pm

physics
A planet is 400 times more massive than the earth, and its radius is 10 times that of the earth. The weight of an object on the surface of the planet is?
Thursday, October 21, 2010 at 5:44pm

earth
Is the amount of solar energy intercepted by earth affected by the presence of clouds in the sky?
Thursday, October 21, 2010 at 12:28pm

physics
A person falls from a height of 2.0m on earth(a=g=9.8m/s2). What acceleration is necessary for them to stop over 30 cm (assuming they bend their knees)? what if they don't bend their knees hence stop over a distance of 1 mm?
Wednesday, October 20, 2010 at 11:49pm

how to find the longitude of meridians
Wednesday, October 20, 2010 at 11:08pm

Chemistry
if you had one mole of m&ms, how many times could you cover the surface of the earth?
Wednesday, October 20, 2010 at 9:27pm

earth
The weight of a large animal is 120 kg on earth , what is the weight on the moon with one-sixth the gravity of the earth ?
Wednesday, October 20, 2010 at 4:00pm

Physics
In an accidental explosion, a satellite breaks in half while in circular orbit about earth. One half is brought momentarily to rest. What is the fate of the half brought to rest? What happens to the other half?
Wednesday, October 20, 2010 at 9:34am

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

Physics - Faucault Pendulum
A Foucault pendulum can be used to demonstrate that earth is rotating. Explain how this is possible. What differences would you notice if you used the pendulum at the North Pole, at Earth's equator, and at altitudes between two points?
Wednesday, October 20, 2010 at 7:09am

physics
1.)The apparent weight of a passenger in an elevator is greater than his true weight? Why is that? 2.) The radius of larger circle is twice that of a small circle. Two identical stones are attached to cords that are being whirled on a table top at the same speed. How would the...
Wednesday, October 20, 2010 at 12:37am

earth science
why are warm and cold fronts ussually weaker in the summer?
Wednesday, October 20, 2010 at 12:23am

earth science
what kind of air mass weather is likely to follow the passing of a warm front?
Wednesday, October 20, 2010 at 12:21am

ITT
In an accidental explosion, a satellite breaks in half while in circular orbit about earth. one half is brought momentarily to rest. what is the fate of the half brought to rest? what happens to the other half?
Tuesday, October 19, 2010 at 3:27pm

science
Mars is 48 million miles from earth. If a spaceship leaves Earth traveling toward Mars at 6 million miles per hour (m.p.h.). How long will it take the spaceship to arrive on Mars.
Tuesday, October 19, 2010 at 12:22pm

Chemistry
I need someone to check these True or False questions for me please: 3. Dissolving salt in water is a physical change- F 14. Burning newspaper is a physical change- F 19. The liter is a measure of volume- T 20. The amount of heat and temperature of a substance are the same- F ...
Tuesday, October 19, 2010 at 12:18pm

physics
On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.9 times as far as he would have on earth, given the same velocities on both planets. The ball is launched at a speed of 54 m/s at an angle of 42° above the horizontal. ...
Tuesday, October 19, 2010 at 12:29am

physics
An airplane with a speed of 13 m/s is climbing upward at an angle of 48° counterclockwise from the positive x axis. When the plane's altitude is 720 m the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the ...
Tuesday, October 19, 2010 at 12:26am

physics
A 120 N child is in a swing that is attached to ropes 2.20 m long. Find the gravitational potential energy of the child-Earth system relative to the child's lowest position at the following times. (a) when the ropes are horizontal (b) when the ropes make a 29.0° angle ...
Monday, October 18, 2010 at 10:05pm

Physics Help!!
A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 6.2×10−5 rad. What diameter spot will it make on the Moon? Express your answer using two significant figures.
Monday, October 18, 2010 at 7:57pm

PHYSICS ---HELP!
A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 6.2×10−5 rad. What diameter spot will it make on the Moon? Express your answer using two significant figures.
Monday, October 18, 2010 at 7:13pm

earth
On planet Tehar, the free-fall acceleration is the same as that on Earth but there is also a strong downward electric field that is uniform close to the planet's surface. A 2.00 kg ball having a charge of 5.00 µC is thrown upward at a speed of 29.2 m/s and it hits ...
Monday, October 18, 2010 at 1:43pm

physics
A 512 kg satellite is in a circular orbit about the Earth at a height above the Earth equal to the Earth's mean radius. (a) Find the satellite's orbital speed. (b) Find the period of its revolution. (c) Find the gravitational force acting on it.
Monday, October 18, 2010 at 1:21pm

physics
would an object weigh more or less if there were no atmosphere on earth
Monday, October 18, 2010 at 12:14pm

Physics
At a certain location, the Earth's magnetic field has a magnitude of 5.90E-5 T and points in a direction that is 71.6° below the horizontal. Calculate the magnitude of the magnetic flux through the top of a desk at this location that measures 132 cm by 83.3 cm.
Monday, October 18, 2010 at 10:38am

physics
The acceleration due to gravity of mars is 3.7 m/s2. An astronautto throw a tennis ball 70 m upward on mars. How high will he able to throw it on the earth?
Monday, October 18, 2010 at 5:26am

science
the acceleration due to gravity of mars is 3.7 m/s2. An astronautto throw a tennis ball 70 m upward on mars. How high will he able to throw it on the earth?
Monday, October 18, 2010 at 5:23am

Science
How much would 1kg weigh on the Moon if the pull of gravity there is about one-sixth of the pull of gravity on earth?
Monday, October 18, 2010 at 2:29am

Physics
A military helicopter on a training mission is flying horizontally at a speed of 60.0 m/s when it accidentally drops a bomb (fortunately, not armed) at an elevation of 300 m. You can ignore air resistance. How much time is required for the bomb to reach the earth? 7.82s How ...
Sunday, October 17, 2010 at 10:04pm

social studies
What is the base for the earth's hills and mountains?
Sunday, October 17, 2010 at 9:11pm

science
what two factors combine to give a person weight on Earth?
Sunday, October 17, 2010 at 2:26pm

physics
A 0.720 kg snowball is fired from a cliff 8.10 m high. The snowball's initial velocity is 14.2 m/s, directed 30.0° above the horizontal. (a) How much work is done on the snowball by the gravitational force during its flight to the flat ground below the cliff? (b) What ...
Saturday, October 16, 2010 at 9:17pm

Physics Honors
A car travels due east with a speed of 60.0 km/h. Rain is falling vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 45.0° with the vertical. Find the velocity of the rain with respect to the car and with respect to...
Saturday, October 16, 2010 at 8:49pm

Quantitative Literacy | MAT106 VG
Pick four cities and divide them into pairs. Use the Internet to find the length of the circle between the first pair of cities. You might try using the site Great Circle Mapper or a similar Web site to help you. Estimate the great circle path between other pair of cities. ...
Friday, October 15, 2010 at 11:02pm

physics
calculate the force on an airplane which has acquired a net charge of 180 C and moves with the speed of 180 m/s perpendicular to the earth's magnetic field 5.0 x 10^-5 T.
Friday, October 15, 2010 at 9:36pm

college
A newly discovered planet is found to have a circular orbit, with a radius equal to 11 times the radius of Earth's orbit. How long does this planet take to complete one orbit around the Sun?
Friday, October 15, 2010 at 8:54pm

physics
Since the industrial revolution, the Earth's average surface temperature has Answer a. risen about 1 K. b. has risen about 3 K. c. has risen about 5 K d. Has not changed significantly.
Friday, October 15, 2010 at 5:47pm

physics
The natural greenhouse effect raises the surface temperature at the surface of the Earth by about 20 or 40 k?
Friday, October 15, 2010 at 5:47pm

Physics
What is the centripetal acceleration of the Moon? The period of the Moon's orbit about the Earth is 27.3 days, measured with respect to the fixed stars. The radius of the Moon's orbit is RM = 3.85 · 108 m.
Thursday, October 14, 2010 at 9:22pm

Physics
Assuming that the Earth is spherical and recalling that latitudes range from 0° at the Equator to 90° N at the North Pole, how far apart, measured on the Earth's surface, are Copenhagen (55.67° N latitude), and Rome (41.90° N latitude)? The two cities lie ...
Thursday, October 14, 2010 at 9:21pm

physics
gravity on the surface of the moon is only 1/6 as strong as gravity on earth. what is the weight of a 37 kg object on the earth? The acceleration of gravity is 10m/s answer in units of N
Thursday, October 14, 2010 at 8:31pm

Math
Gravity on the moon is about one-sixth of gravity on Earth. An astronaut standing on a tower 20 feet above the moon's surface throws a ball upward with a velocity of 30 feet per second. The height of the ball at any time t (in seconds) is h(t) = -2.67t squared + 30t + 20. ...
Thursday, October 14, 2010 at 6:50pm

Science
for anybody:there is evidence that human beings could be a part of the 6th extinction on earth. Do you believe this is true? Why is Why not? Write a statement explaining your beliefs.
Thursday, October 14, 2010 at 3:41pm

Physics
Calculate the tangential speed of the earth around the sun (assuming a circular orbit).
Wednesday, October 13, 2010 at 10:37pm

earth space science
A chemical sedimentary rock that forms mainly in restricted ocean basins in areas with high evaporation rates is an
Wednesday, October 13, 2010 at 9:34am

Physics - Potential difference (check + help)
A pair of horizontal plates are situated in a vacuum and separated by a distance of 1.8cm. What potential energy would need to be connected across the plates in order to hold a single electron suspended at rest between them? Ans: I used the formula (qv)/d = mg ; where q=is the...
Wednesday, October 13, 2010 at 5:15am

physics
What is the angular velocity in radian per second of a satellite that has an orbital velocity of 9000 m.s^-1, orbiting at a distance of 6500 km from the center of the earth
Tuesday, October 12, 2010 at 11:13pm

english
For my assignment I have to find an advertisement, analyze it, and write my interpretation of it. I've done this, but I'm coming out short on words for the assignment. And I feel like there's nothing else that I can mention. I'm supposed to write 500 words and ...
Tuesday, October 12, 2010 at 8:25pm

physics
What is the average density of the earth? M = 5.97 x 10^24 kg , R = 6370 km
Tuesday, October 12, 2010 at 5:35pm

science
how do the fluxes of radiation help explain why air temperature near the earth's surface is higher than it is 2km above the earth's surface
Tuesday, October 12, 2010 at 1:02am

Physics
The space shuttle releases a satellite into a circular orbit 440 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?
Monday, October 11, 2010 at 10:01pm

What are three interesting facts about the upper mantle of the earth? and 3 interesting facts about the lower mantle of the earth?
Monday, October 11, 2010 at 6:58pm

PHYSICS ---HELP!
The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?
Monday, October 11, 2010 at 6:40pm

physics
The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs? V = m/s ??
Monday, October 11, 2010 at 6:02pm

algebra
7=T/-7 How on earth would I solve this?
Monday, October 11, 2010 at 4:26pm

physics
A high-voltage power line carries a current of 120 A at a location where the Earth's magnetic field has a magnitude of 0.577 G and points to the north, 70.8° below the horizontal. Calculate the magnitude of the magnetic force exerted on a 258 m length of wire if the ...
Monday, October 11, 2010 at 2:44pm

physics
The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?
Monday, October 11, 2010 at 2:15pm

PHYSICS ---HELP!
The space shuttle releases a satellite into a circular orbit 700 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?
Monday, October 11, 2010 at 12:18pm

physics
A hypothetical planet has a radius 1.1 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface? Express your answer using two significant figures.
Monday, October 11, 2010 at 12:01pm

earth space science
A substance that cannot be broken down into simpler substances by physical or chemical needs is called an
Monday, October 11, 2010 at 11:26am

science
Why does Mars' appear fainter than Venus, as seen from Earth?
Sunday, October 10, 2010 at 4:09pm

physics
the gravitational field strength at the earth's surface is 10n/kg. calculate the wight of the following: A. a person of mass 80kg B. a 2kg bag of sugar C. a 125kg pack of tea
Sunday, October 10, 2010 at 10:57am

Earth Science
Give the latitude and longitude to the centers of these bodies of water: The sea of japan and the indian ocean.
Saturday, October 9, 2010 at 10:30pm

English 2
2. The overall message of "To Every Thing There Is A Season" is a. every human emotion and activity has an appropriate time in life b. life is a meaningless cycle of pleasure and pain c. humans have been given power over nature, and they should use it wisely d. there...
Friday, October 8, 2010 at 7:22pm

ryan
You propose to build a space ship that allows the entire population of the United States (280 million) to leave earth. Your plans allocate an average space of 1,000(=10*10*10) cubic feet to each person. You space ship is going to have the shape of a sphere. The radius of you ...
Friday, October 8, 2010 at 5:07pm

Earth Science
Where in the Atlantic Ocean would you expect surface water to sink and initiate a subsurface flow. List the reason(s) for your choice(s).
Friday, October 8, 2010 at 2:49pm

physics
A 715 kg object is lifted from the surface of the earth to a height of 880 kg above the surface of the earth. Calculate the increase in gravitational potential energy using the exact expression and compare it with the approximate expression using g=9.81. Give the magnitude of ...
Friday, October 8, 2010 at 7:06am

physics
A 72.0 kg piece of a satellite left over from an explosion with zero orbital velocity in space falls from a distance of 190 above the surface of the earth down toward earth. It arrives with 29.5 Km (M="mega") kinetic energy on earth. How many MJ energy have been lost...
Friday, October 8, 2010 at 6:56am

science
when brought to the surface of the moon will a mass have more or less weight than it did on the surface of earth or stay the same ?
Friday, October 8, 2010 at 12:48am

Physics
This is my homework problem: "The pilot of a plane is flying at 450 mi/hr W 20.0 degrees S relative to the earth. She sees another plane flying at 350 mi/hr N 40.0 degrees W relative to her plane. What was the magnitude and direction of the plane she saw relative to the ...
Thursday, October 7, 2010 at 6:08pm

Physics
A) Calculate the mass of the sun from the radius of the earth's orbit (1.50×1011 m), the earth's period in its orbit, and the gravitational constant G. B) What is the density of the sun ? (The sun's radius is 6.96×108 m). Notice how it compares with the...
Wednesday, October 6, 2010 at 1:50pm

physics
If there were no air drag, how fast would drops fall from a cloud 2.4 kilometer above the Earth's surface? answer in m/s.
Wednesday, October 6, 2010 at 9:00am

Science
How sediments,fossil, and ice core record Earth's geologic history? It record Earth's geologic history by giving scientist an idea of when certain climates or events happen.(Is this a good answer?) Thanks
Wednesday, October 6, 2010 at 7:20am

physics
An airplane has a velocity of 400 km/h relative to the wind. At the same time, a wind blows northward with a speed of 75 km/h relative to earth. Find the direction that the airplane must head in order to move in an easterly direction relative to earth.
Wednesday, October 6, 2010 at 4:15am

Which planet has the gravitational force that is closest to Earth's gravitational force?
Tuesday, October 5, 2010 at 3:39pm

physics
If there were no air drag, how fast would drops fall from a cloud 2.4 kilometer above the Earth's surface? Answer in m/s.
Tuesday, October 5, 2010 at 12:58pm

Find the acceleration of the following reference frames i)when a reference frame fixed to the surface of the Earth at latitude 37 degree.ii)A reference frame with origin at the center of Earth with one axis always pointing toward the Sun. iii)A reference frame with origin at ...
Tuesday, October 5, 2010 at 12:46pm

college physics
Explain each of the following questions. ( a) Can an object– Earth system have kinetic energy and not gravitational potential energy? ( b) Can it have gravitational potential energy and not kinetic energy? ( c) Can it have both types of energy at the same moment? ( d) Can...
Tuesday, October 5, 2010 at 11:33am

physics
Explain each of the following questions. ( a) Can an object– Earth system have kinetic energy and not gravitational potential energy? ( b) Can it have gravitational potential energy and not kinetic energy? ( c) Can it have both types of energy at the same moment? ( d) Can...
Tuesday, October 5, 2010 at 11:14am

earth/space science
Walking along the sidewalk one day, you find a rock and want to know what kind it is. You look at it and se that it is an off white color, is greasy feeling when you rub it, and your fingernail scratches it and breaks it up. What kind of mineral do you think you have found?
Tuesday, October 5, 2010 at 10:38am

Geographyand socity
1. _______________________ is the science of predicting the weather. (1 point) Climatology Ecology Meterology Botany 2. _______________________ is the condition of the atmosphere at any given location and time. (1 point) Weather Precipitation Climate Temperature 3. This layer ...
Tuesday, October 5, 2010 at 9:11am

science
what is the phsical layer of earth that is dividedunto tetonic plates is called the _____________
Monday, October 4, 2010 at 9:39pm

earth
A helicopter is ascending vertically with a speed of 4.00 m/s. At a height of 185 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
Monday, October 4, 2010 at 6:06pm

Physics
Consider the earth following its nearly circular orbit about the sun. The earth has mass 5.98*10^24 and the sun has mass 1.99*10^30. They are separated, center to center, by r=150 million k. What is the size of the gravitational force acting on the earth due to the sun?
Sunday, October 3, 2010 at 8:59pm

anna
From the poem "The Wanderer" What is the plight of the wanderer "earth-walker"? How did he become what he is and what is he seeking?
Sunday, October 3, 2010 at 7:59pm

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

Science
If Earth's mass were smaller, how would Earth's gravity be affected?
Sunday, October 3, 2010 at 4:56pm

Science
If an astronaut could hop 40 cm high on Jupiter, how high could he or she jump on Earth?
Sunday, October 3, 2010 at 4:52pm

English
I really need to know if the rephrasing is correct. As I'm not a native speaker, I need to consider all the possible alternatives (?).It doesn't matter if the same concept has been repeated all over again.Thank you very much for you cooperation! 1.Kurtz wanted to ...
Sunday, October 3, 2010 at 10:43am

English
Thank you very much for your corrections. Here are some more sentences I'd like you to check. 1.Kurtz wanted to realize (to fulfil) his highly moral ideals but he failed. He wanted his ideals to come true but he failed because he was left alone to face the wilderness of ...
Sunday, October 3, 2010 at 7:07am

College Physics
In designing rotating space stations to provide for artificial-gravity environments, one of the constraints that must be considered is motion sickness. Studies have shown that the negative effects of motion sickness begin to appear when the rotational motion is faster than ...
Saturday, October 2, 2010 at 2:09pm

EARTH science
A 100-gram rock has a volume of 35 cubic centimeters. Find the density of the rock.
Friday, October 1, 2010 at 10:47pm

Physics
A Borg cube starship is zooming past Earth with a speed v=0.97c as shown. The cube has side lengths of 3.03 km. What is its volume, measured from Earth? Can someone step me through this problem?
Friday, October 1, 2010 at 9:17pm

Physics
An airplane has a velocity of 454 km/h relative to the moving air. At the same time, a wind blows northward with a speed of 99 km/h relative to earth. The airplane is moving in an easterly direction relative to earth. Find the speed of the airplane to relative to earth. So, i ...
Friday, October 1, 2010 at 4:49pm

physics
A satellite is orbit about earth, its orbital radius is 3.43*10e7m.The mass of the satellite is 9166kg and the mass of earth is 5.974*10e24kg. Determine the orbital speed of the satellite in mi/s. 1mi/s=1609m/s.
Friday, October 1, 2010 at 3:35pm

earth
why was Copernicus model accepted over the geocentric model, even when it did not predict stellar event any better than the geocentric model
Friday, October 1, 2010 at 1:13pm

English
Are any of these examples of imagery, personification, similie, metaphor, connotation, denotation 1) Pam is standing there with Joe's head in sink and this bottle of coloring that is red. Not normal hair color red, red like a maraschino cherry 2) I reach over and rub him ...
Thursday, September 30, 2010 at 8:39pm

Physics
The international space station ISS travels now with a speed of 7352 m/s. Calculate a) the radius of its orbit; b) the height of the orbit; c) the period of its motion around Earth.
Thursday, September 30, 2010 at 10:31am

Earth Science
Please and Thank you. Mercury is 13.6 times more dense than water. If a container can hold 20g of water, how much more massive would an equal volume of mercury be?
Wednesday, September 29, 2010 at 10:59pm

Science
If the acceleration gravity is 1.6m/2 on the moon and you weigh 539 N on earth, how much do weigh on the moon?
Wednesday, September 29, 2010 at 10:34pm

A metroid entering Earth's atmosphere has a speed of 70.0 km/s and a kinetic energry of 2.56 X 10^15 J. What is the mass of the meteroid?
Wednesday, September 29, 2010 at 10:16pm

algebra
Write and solve an inequality to find the approximate circumference of Earth using the following information - the 4 million miles of public roads in the U.S. would: Reach to the moon and back more than eight times, circle the globe more than 157 times
Wednesday, September 29, 2010 at 9:09pm

earth
If the Earth has so much mass, then how does it "float"? (My 8th grade Astronomy class trying to figure this out. -Lauren
Wednesday, September 29, 2010 at 9:06am

Physics question bout falling
Objects that are falling toward Earth in free fall move a)faster and faster. b)slower and slower. c)at a constant velocity. d)slower then faster.
Wednesday, September 29, 2010 at 6:01am

College Physics
A Borg cube starship is zooming past Earth with a speed v=0.97c as shown. The cube has side lengths of 3.03 km. What is its volume, measured from Earth? Can someone step me through this problem?
Tuesday, September 28, 2010 at 4:54pm

geology
We determine the structure of the Earth's core using: a)deep mine shafts b)satellite imaging c)radar and sonar d)seismic wave data e)magnetic resonance imaging
Monday, September 27, 2010 at 7:30pm

Earth and Space Science
Clouds form primarily at the boundary between a)the stratosphere and mesosphere b)the mesosphere and ionosphere c)the troposphere and mesosphere d)the troposphere and stratosphere e)the hydrosphere and troposphere
Monday, September 27, 2010 at 2:41pm

algerbra 1
Antartica comprises about 10.5% of the total land area on earth. antartica has a surface area of about 5,400,000 square miles. what is the total land area on earth? write an equation and slove.
Sunday, September 26, 2010 at 8:00pm

Math
Hint: Pay attention to the units of measure. You may have to convert from feet to miles several times in this assignment. You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the weight of an object varies on different planets, but did you know that ...
Saturday, September 25, 2010 at 11:44pm

earth - website
I would love my 4th grade students to explore a fun website about the earth and/ or other planets. Do you know any fun and interesting websites that my kids would enjoy exploring while learning about their planet earth.
Saturday, September 25, 2010 at 11:29pm

Science
Ignoring air resistance, an object falling near the surface of the Earth has an acceleration that is: A. constant B. increasing C. decreasing D. dependant on the weight of the object
Saturday, September 25, 2010 at 10:26am

how faraway is Pluto from Earth?
Saturday, September 25, 2010 at 9:15am

Physics
A satellite of mass 5700 orbits the Earth and has a period of 6000 . a) Determine the radius of its circular orbit. b) Determine the magnitude of the Earth's gravitational force on the satellite. c) Determine the altitude of the satellite.
Friday, September 24, 2010 at 9:05pm

Physics
How far would you have to drill into the Earth, to reach a point where your weight is reduced by 8.0 ? Approximate the Earth as a uniform sphere.
Friday, September 24, 2010 at 7:53pm

Science
What are some bad things on Earth ?
Friday, September 24, 2010 at 7:32pm

how many miles is Jupitor from Earth?
Friday, September 24, 2010 at 7:26pm

math
You can use 1 mile = 5,280 feet for your conversions. 1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an ...
Friday, September 24, 2010 at 11:08am

earth science
how did cultures throughout history attempt to explain events such as volcano eruptions, earthquakes, and ecipses?
Friday, September 24, 2010 at 12:53am

earth science
If an atom has 17 electrons and its mass number is 35, calculate the following: number of protons, atomic number, and number of neutrons.
Thursday, September 23, 2010 at 8:36pm

science
How can I write a 500 word essay on what agriculture means to me by comparing the pros and cons of early 1900's agriculture, the industrial war, effects of chemical warfare on the agriculture industry, including people, animals, the earth, while basing some of my research ...
Thursday, September 23, 2010 at 4:44pm