Tuesday
May 21, 2013

# Homework Help: Science: Earth

Geography
Where on Earth? You're standing outside the airport terminal in Moscow on a cold winter night. Snow streams past the windows of the taxi as you ride to your hotel. Leaning back in the seat, you review the purpose of your trip. As director of operations for a major American...
Tuesday, April 27, 2010 at 9:02pm

Geography
Where on Earth? You're standing outside the airport terminal in Moscow on a cold winter night. Snow streams past the windows of the taxi as you ride to your hotel. Leaning back in the seat, you review the purpose of your trip. As director of operations for a major American...
Tuesday, April 27, 2010 at 6:40pm

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....
Tuesday, April 27, 2010 at 3:37pm

Environmental Science
For my Environmental Science Research Paper on Coral Reefs, I have started writing the Introduction paragraph. My teacher said to include everything that will be mentioned throughout the paper. And so I copied this paragraph from my workbook because this is everything that I ...
Tuesday, April 27, 2010 at 1:02pm

college physics
The intensity of an earthquake wave passing through the Earth is measured to be 2.5×10^6 J/m^2 at a distance of 43 km from the source. What was its intensity when it passed a point only 2.0 km from the source? AND At what rate did energy pass through an area of 4.0 m^2 ...
Tuesday, April 27, 2010 at 10:33am

physics
A pendulum has a period of 0.57 s on Earth. What is its period on Mars, where the acceleration of gravity is about 0.37 that on Earth?
Monday, April 26, 2010 at 12:49pm

College Physics
Sirius is about 9.0 light-years from Earth. To reach the star by spaceship in 10 years (ship time), how fast must you travel? How long would the trip take according to an Earth-based observer? How far is the trip according to you?
Sunday, April 25, 2010 at 10:42pm

physics
the earthis moving around the sun in a circular orbit of radius 1.5*10^11. it makes one revolution per year.find the angular speed of earth in radian/sec, and the tangential speed of earth using the formula v=r.w , and tangetial speed ?
Sunday, April 25, 2010 at 10:29pm

Phsyics Waves
Earthquakes are essentially sound waves traveling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse seismic waves. These travel at different speeds. The speed of longitudinal waves, called P waves, is ...
Sunday, April 25, 2010 at 5:25pm

one light year is about 9 trillion kilometers . arctus is a star that is 37 light years from earth.if you are 11 years old now,how old will you be when light that is leaving arcturus today reaches earth. how far in kilometers willit have traveled .sow your work.
Sunday, April 25, 2010 at 1:23pm

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

Physics
Earth's moon is 3.8 X 10 8 m from the planet and is in freefall. Acceleration due to the Earth's gravity acting on the moon is 2.70X 10 -3. What is the moon's speed? How long does it take to make a complete orbit?
Thursday, April 22, 2010 at 11:44pm

English-Poetry
Wilfred Owen Dulce Et Decorum Est Bent double, like old beggars under sacks, Knock-kneed, coughing like hags, we cursed through sludge, Till on the haunting flares we turned our backs And towards our distant rest began to trudge. Men marched asleep. Many had lost their boots ...
Thursday, April 22, 2010 at 9:03pm

English-Poetry
My Guilt When I was a child I walked two miles to school accompanied by a neighbor boy two years younger. Freddie was fat and freckle faced with wheat-straw hair and a mean stepmother. It was late fall and one day his father bought him a new winter cap. It was made of heavy ...
Wednesday, April 21, 2010 at 9:10pm

physics
The moon has a mass of 7.35 E 22 kg and is located 3.84 E 8 meters from the Earth. If Ellen, an earthling, has a mass of 47 kg, what is the gravitational force between Ellen and the moon?
Wednesday, April 21, 2010 at 7:33pm

Physics Waves
Earthquakes are essentially sound waves traveling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse seismic waves. These travel at different speeds. The speed of longitudinal waves, called P waves, is...
Wednesday, April 21, 2010 at 6:31pm

physic
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, April 21, 2010 at 5:52pm

English
Can you check if the following sentences are possible in English? Thank you very much in advance for your invaluable help. 1) The barons received lands (or land) from the king. 2) The land was held by the vassals. 3) In the medieval mind (?) there was also the theory of a ...
Tuesday, April 20, 2010 at 1:33pm

physics
Near the surface of the Earth, a startled armadillo leaps vertically upward at time t = 0, at time t = 0.5 s, it is a height of 0.98 m above the ground. At what time does it land back on the ground?
Tuesday, April 20, 2010 at 12:08pm

Physics:upward acc of earth
If the Earth's gravitational force causes a falling 93 kg student to accelerate downward at 9.8 m/s2, determine the upward acceleration of the Earth during the student's fall. Take the mass of the Earth to be Mearth = 5.98 x 1024 kg. Answer in units of m/s2.
Tuesday, April 20, 2010 at 12:06am

Physics: Astronauts and space
When out in space in International Space Station (ISS), Astronauts experience weightlessness. The ISS’s orbit is 354 km (that is 3.54 x 105 m) above the surface of the earth.The distance separating the center of the earth from the center of the ISS is then approximately ...
Monday, April 19, 2010 at 11:48pm

Physics: How much do you way on another planet
A person weighs 900 N on Earth. What would he weigh on another planet, where the free-fall acceleration is 26.4 m/s2? Answer in units of N.
Monday, April 19, 2010 at 11:26pm

earth
how would eath's gravity effect you in space??? At what altitude does the Earth's gravity no longer have an effect on the astronauts or the space shuttle???
Monday, April 19, 2010 at 4:35pm

science
is the weight of an object the same at any point on the earth
Sunday, April 18, 2010 at 1:53pm

Geography
Where on Earth: Country A is described as "shaped like an S, tropical rain forest, very populous, facing the South China Sea." -First I said Indonesia, and it was wrong.I'm pretty sure it's Vietnam Country B earns this note: "a wet land bordered by ...
Friday, April 16, 2010 at 8:09pm

physics
Spaceship I, which contains students taking a physics exam, approaches Earth with a speed of 0.640 c, while spaceship II, which contains instructors proctoring the exam, moves away from Earth at 0.280 c, as in Figure P26.27. If the instructors in spaceship II stop the exam ...
Friday, April 16, 2010 at 11:40am

physics
Spaceship I, which contains students taking a physics exam, approaches Earth with a speed of 0.640 c, while spaceship II, which contains instructors proctoring the exam, moves away from Earth at 0.280 c, as in Figure P26.27. If the instructors in spaceship II stop the exam ...
Friday, April 16, 2010 at 12:00am

physics
Can a person, in principle, travel from Earth to the galactic center (which is about 2.3e4 lightyears distant) in a normal lifetime? Explain, using either time-dilation or length contraction arguments. If they want to make the trip in 24 y what distance would the person ...
Thursday, April 15, 2010 at 11:19pm

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.
Thursday, April 15, 2010 at 11:18pm

Physics
It can be shown that for a uniform sphere the force of gravity at a point inside the sphere depends only on the mass closer to the center than that point. The net force of gravity due to points outside the radius of the point cancels. How far would you have to drill into the ...
Thursday, April 15, 2010 at 12:41am

Phsyics
The center of a 1.10km diameter spherical pocket of oil is 1.10km beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is . Express your answer using...
Thursday, April 15, 2010 at 12:41am

Video Guide: How the Earth was Made Section 1: 1. What did James Hutton discover as proof that the Earth was an old Earth? 2. What is the scientific explanation for how the Earth was formed? 3. What did Kelvin not take into account as far as the Earth cooling? 4. What are ...
Wednesday, April 14, 2010 at 8:20pm

Science
What does the Space Shuttle use to land when returning to Earth ?
Wednesday, April 14, 2010 at 6:57pm

Science/Astronomy
Large geomagnetic storms can cause surges of electric current here on Earth. What is the MOST LIKELY result of a large surge in electric current? F. power outages G.better TV reception H. cheaper electric power I. Local Group galaxy What is the answer???
Tuesday, April 13, 2010 at 6:57pm

Science
What percentage of the sun is shine on the Earth in Maine during Spring
Tuesday, April 13, 2010 at 5:26pm

English
Can you check these sentences for me, please? Thank you very much for your help. 1)Big Brother is a TV programme (or a reality show?) about people and relationships. 2) In particular, contestants have to stay in the same house for ten weeks. 3) They have to make their own food...
Tuesday, April 13, 2010 at 5:01pm

math
Describe all the points on the Earth’s surface that are exactly 4000 miles from the North Pole. If you need to, use 3960 miles for the radius of the Earth.
Monday, April 12, 2010 at 11:54pm

english-what would you wish for
This was the question of the day What would be one wish that you would wish for if you had a chance. I would wish for Earth to stay as our home forever. Can I have your outlook on this?
Monday, April 12, 2010 at 8:10pm

math
Describe all the points on the Earth’s surface that are exactly 4000 miles from the North Pole. If you need to, use 3960 miles for the radius of the Earth.
Monday, April 12, 2010 at 7:25pm

earth
If the distance from the moon to the Earth increased from 230,000 (which it is today) to 2,000,000 miles, what affect would this have on the tides?
Monday, April 12, 2010 at 3:14pm

college Physics
You are in closed room somehwere on Earth. You have no compas, gyroscope or GPS. No TV, phone, FAX, emil, computer, internet, or cell. No cable no external connections with outside networks. However you have electricity the regular network and a lab with all sort of electric ...
Monday, April 12, 2010 at 11:27am

physics
The force produced by Earth's gravity on a 70 kg man standing on the moon is more than 0.5 N True or False?
Sunday, April 11, 2010 at 8:10pm

physics
What is the linear speed of a point: a) on the equator, b) on the Arctic Circle (latitude 66.5 degrees N), c) at a latitude of 45.0 degrees N, due to the Earth's rotation? a relevant equation is v=rw, but I'm not sure how to apply it to the equation
Sunday, April 11, 2010 at 1:22pm

physics
A satellite moves in a circular orbit around Earth at a speed of 4390 m/s (a) Determine the satellite's altitude above the surface of Earth.(meters) (b) Determine the period of the satellite's orbit. (hours) I used the equation M(sattelite)V^2/r = M(sattelite)(Mass(...
Saturday, April 10, 2010 at 6:39pm

English
I have to create a mood poem so I am posting it onto here for you to suggest on what I could add to it to make it better and any other recommendations. I would like to hear your opinion on the poem I've established. If some words seem awkward, then I would appreciate you ...
Friday, April 9, 2010 at 9:54pm

earth sceince
A fault is observed in a road cut, but there are no obvious rock units to correlate on either side of the fault to determine relative movement. How else might you determine or even infer whether the hanging wall has moved up or down relative to the footwall? (Hint: Think of ...
Friday, April 9, 2010 at 5:30pm

Geography
Where on Earth? Asian Wonder Rice 36. The reports coming back from the field couldn't be better. Your new strain of rice is exceeding all of your expectations. You developed it, using the latest techniques. It grows faster, has a tougher skin, and is more nutritious than ...
Friday, April 9, 2010 at 4:41pm

English
Thank you very much for suggesting me such useful sites! I still have a few more sentences to prepare for tomorrow. I really hope you can have a look at them, too. (just say "yes" if it is possible) 1 ) Another feature of the epic poem is that it contains formulas (...
Friday, April 9, 2010 at 3:10pm

English
Thank you very much for helping me! Here are some more sentences I'd like you to check. Thank you very much! 1) In fighting against the dragon, Beowulf performed (can you use “did” too?) three actions. 2) First he, concealed by the barrow, raised his shield. OR ...
Friday, April 9, 2010 at 6:14am

physics
The polar ice caps contain about 2.76E+19 kg of ice. This mass contributes negligibly to the moment of inertia of Earth because it is located at the poles, close to the axis of rotation. Estimate the change in the length of the day that would be expected if the polar ice caps ...
Friday, April 9, 2010 at 12:07am

Physics
Can a person, in principle, travel from Earth to the galactic center (which is about 2.30×104 lightyears distant) in a normal lifetime? Explain, using either time-dilation or length contraction arguments. If they want to make the trip in 26 y what distance would the ...
Thursday, April 8, 2010 at 11:02pm

Earth science
what is the material between 2900 kilometers and 5200 kilometers below earths surface inferred to be
Thursday, April 8, 2010 at 2:06pm

Health
(Patient Self-Determination Act) How do you think records management procedures have had to respond to this piece of legislation?
Thursday, April 8, 2010 at 1:04pm

Geography
Select all of the answers that apply. A map _____. 1)is a representation of the earth's surface 2)is a portable document describing an area 3)can provide data such as migration trends, directions, and rock composition 4)provides all of the information about a location
Wednesday, April 7, 2010 at 9:41pm

earth science
Select all of the answers that apply. Some rules to remember when reading topographic maps are _____. 1)the elevations of contour lines must always be whole number multiples of the contour interval. 2)the thin line separating two different rock units is a contact line 3)points...
Wednesday, April 7, 2010 at 9:25pm

earth science
if continental crust were thinner than its average thickness of 40 km, would it depress the mantle more or less than it does now?
Wednesday, April 7, 2010 at 9:24pm

physics
A satellite moves in a circular orbit around Earth at a speed of 4390 m/s. (a) Determine the satellite's altitude above the surface of Earth. m (b) Determine the period of the satellite's orbit. h am I supposed to use rotational equations for this? I don't know ...
Wednesday, April 7, 2010 at 1:26pm

earth science
Almost all maps have these four things: A)scale, legend, title, and compass B)rock units, legend, symbols, and scales C)contour lines, scale, legend, and compass D)rock types, legend, compass, and scale
Wednesday, April 7, 2010 at 11:50am

Earth Science
Select all of the answers that apply. A map _____. 1)is a representation of the earth's surface 2)is a portable document describing an area 3)can provide data such as migration trends, directions, and rock composition 4)provides all of the information about a location
Wednesday, April 7, 2010 at 11:47am

Math
Hint for this assignment: Pay attention to the units of measure. You may have to convert from feet to miles 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 ...
Wednesday, April 7, 2010 at 10:04am

About how many people lying head-to-toe are needed to strech around the earth? Is it closest to : a) 1 million; b) 25 million; c) 100 million? (Hint: The distance around the earth is approximately 25,000 miles).
Tuesday, April 6, 2010 at 8:41pm

Physics
A projectile is shot straight up from the earth's surface at a speed of 1.20×104 km/hr. How high does it go?
Tuesday, April 6, 2010 at 7:42pm

Science (Atmosphere)
What happens to the energy absorbed by Earth's surface and atmosphere? They get radiated back into space as longer wave radiation. Is there anything else I should add to this answer? Thanks.
Tuesday, April 6, 2010 at 5:49pm

Math
A satellite is launched into orbit 200 kilometers above the Earth.The orbital velocity of a satellite is given by the formula v=√GmE/r, where v is the velocity in meters per second, G is a given constant, mE is the mass of Earth, and r is the radius of the satellite"...
Tuesday, April 6, 2010 at 10:00am

Physics
A projectile is shot straight up from the earth's surface at a speed of 1.20×104 KM/HR. How high does it go?
Tuesday, April 6, 2010 at 1:27am

Physics
The center of a 1.10km diameter spherical pocket of oil is 1.10km beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is . Express your answer using...
Monday, April 5, 2010 at 11:04pm

physics
somewhere between earth and the moon gravity from these two bodies on a space pod would cancel. Is this location nearer to earth or the moon?
Monday, April 5, 2010 at 10:32pm

Projectile Motion Problem
A projectile is shot straight up from the earth's surface at a speed of 1.20×10^4 km/h. How high does it go?
Monday, April 5, 2010 at 2:37am

Physics
Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller diameter. If you weigh 665N on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 19.0...
Monday, April 5, 2010 at 1:49am

physics
How do i find this? A shooting star is a meteor that burns up when it reaches Earth's atmosphere. Many of these meteoroids are quite small. Calculate the kinetic energy of a meteoroid of mass 6.0 g moving at a speed of 45 km/s and compare it to the kinetic energy of a 1400...
Sunday, April 4, 2010 at 9:44pm

Physics
Neutron stars, such as the one at the center of the Crab Nebula, have about the same mass as our sun but a much smaller diameter. If you weigh 665 on the earth, what would be your weight on the surface of a neutron star that has the same mass as our sun and a diameter of 19.0...
Sunday, April 4, 2010 at 3:11pm

Physics Problem 6.22
It can be shown that for a uniform sphere the force of gravity at a point inside the sphere depends only on the mass closer to the center than that point. The net force of gravity due to points outside the radius of the point cancels. How far would you have to drill into the ...
Sunday, April 4, 2010 at 2:02pm

Physics Problem 6.12
Estimate the acceleration due to gravity at the surface of Europa (one of the moons of Jupiter) given that its mass is and making the assumption that its density is the same as Earth's
Sunday, April 4, 2010 at 1:56pm

Physics Problem 6.20
The center of a 1.10 diameter spherical pocket of oil is 1.10 beneath the Earth's surface. Estimate by what percentage directly above the pocket of oil would differ from the expected value of for a uniform Earth? Assume the density of oil is 8.0*10^2kg/m^3. Δg/g = ? %
Sunday, April 4, 2010 at 1:51pm

Physics Problem 6.20
The center of a 1.40 km diameter spherical pocket of oil is 1.50 km beneath the Earth's surface. Estimate by what percentage g directly above the pocket of oil would differ from the expected value of g for a uniform Earth? Assume the density of oil is 8.0*10^2kg/m^3. ...
Sunday, April 4, 2010 at 1:31pm

Physics
In the absence of external torques, the angular momentum of a system is conserved. An artificial satellite orbiting the Earth quadruples its kinetic energy. Assuming no external torques act on the system, the radius of the orbit will ... a. Decrease by a factor of 4 b. ...
Sunday, April 4, 2010 at 7:21am

greek bases
the greek base in the word chronology means: a.life b.pain c.time d.earth i choose c?
Saturday, April 3, 2010 at 8:03pm

MATH
The tail of a giant kangaroo is attached by a giant rubber band to a stake in the ground. A flea is sitting on top of the stake eyeing the kangaroo (hungrily). The kangaroo sees the flea leaps into the air and lands one mile from the stake (with its tail still attached to the ...
Friday, April 2, 2010 at 12:50pm

Science
Using a " Cause and effect map" illlustrate a rapid and slow change caused by molten rock and it's effect on Earth's surface and write a detailed description how molten rock found below the Earth's crust can cause change to Earth's surface and it'...
Thursday, April 1, 2010 at 8:05pm

Physics
You observe an arti cial satellite orbiting the earth and estimate it is at an altitude h = [03] km above the earth's surface and has a mass m = 3500 kg. You wish to calculate when the satellite will be back in the same position. From the second law of motion and the ...
Thursday, April 1, 2010 at 7:53pm

math
The tail of a giant kangaroo is attached by a giant rubber band to a stake in the ground. A flea is sitting on top of the stake eyeing the kangaroo (hungrily). The kangaroo sees the flea leaps into the air and lands one mile from the stake (with its tail still attached to the ...
Thursday, April 1, 2010 at 4:11pm

college, Astronomy
Compared with the strength of Earth's gravity at its surface, how much weaker is gravity at a distance of 13 Earth radii from Earth's center?
Wednesday, March 31, 2010 at 1:12pm

Astronomy
Compared with the strength of Earth's gravity at its surface, how much weaker is gravity at a distance of 13 Earth radii from Earth's center?
Wednesday, March 31, 2010 at 1:11pm

Geography
Where on Earth? You work for a company that specializes in environmental cleanup. Your company has been approached by representatives of several Eastern European governments. They want to clean up the Danube River and are asking companies in the United States to help search ...
Tuesday, March 30, 2010 at 7:22pm

physics
A rocket is fired straight up through the atmosphere from the South Pole, burning out at an altitude of 208 km when traveling at 5.8 km/s. (a) What maximum distance from Earth's surface does it travel before falling back to Earth? I know how to do the work, but i can't...
Monday, March 29, 2010 at 11:04pm

Astronomy
Suppose you received a message from aliens living on a planet orbiting a star identical to our Sun. They say they live 4 times farther from tier star than Earth is from the sun. What is the length of their year compare to ours?
Monday, March 29, 2010 at 5:16am

physics
a projectile is fired in the earth's gravitational field with a horizontal velocity of v=9.00 m/s. How far does it go in the horizontal direction in 0.550 seconds?
Sunday, March 28, 2010 at 9:06pm

physics
A ball of mass 0.075 kg is fired horizontally into a ballistic pendulum. The pendulum mass is 0.350 kg. The ball is caught in the pendulum, and the centerof mass of the system rises a vertical distance of 0.145 m in the earth's gravitational field. What was the original ...
Sunday, March 28, 2010 at 9:03pm

physics
A ball of mass 0.075 kg is fired horizontally into a ballistic pendulum. The pendulum mass is 0.350 kg. The ball is caught in the pendulum, and the centerof mass of the system rises a vertical distance of 0.145 m in the earth's gravitational field. What was the original ...
Sunday, March 28, 2010 at 9:01pm

Astronomy
Retrograde motion describe the A backward motion of the stars relative to Earth B uniform circular motion exhibited by the planets C irregular speeds at which the planet travel. D backward motion of the planets with respect to the stars I think the answer is A But my book ...
Sunday, March 28, 2010 at 6:34pm

math
Earth exerts a force on an object equal to the objects weight. the object exerts a force on earth I think the answer is it equal zero?
Sunday, March 28, 2010 at 5:57pm

astronomy
Retrograde motion describes the backward motion of the stars relative to earth
Saturday, March 27, 2010 at 9:19pm

Astronomy
The precession of the Earth its causes, and its ramifications
Saturday, March 27, 2010 at 6:16pm

science
When astronauts travel into space, they can still see Earth and the moon. why is this possible? A. The sun shines in the windows of their space vehicle. B. They view earth and moon through a telescope. C. The sun's light reflects off earth and the moon. D. The astronauts ...
Saturday, March 27, 2010 at 5:48pm

Earth Science
What is the major source of free oxygen in the atmosphere? Would it be trees?
Friday, March 26, 2010 at 11:14pm

Earth Science
which geologic era had the shorest time span and the longest time span? 1) Longest = paleozoic 20 shortest = cenozoic Is this correct?
Friday, March 26, 2010 at 11:07pm

Earth Science
What is the primary basis for differentiating the Eras?
Friday, March 26, 2010 at 10:32pm

physics
A rocket is fired straight up through the atmosphere from the South Pole, burning out at an altitude of 208 km when traveling at 5.8 km/s. (a) What maximum distance from Earth's surface does it travel before falling back to Earth?
Friday, March 26, 2010 at 7:07pm

trig
an airplane leaves the airport and flies due west 150 miles and then 240 miles in the direction 200°40'. Assuming the earth is flat, how far is the plane from the airport at this time( to the nearest mile)?
Friday, March 26, 2010 at 5:17pm

science
Objects take up space and move through space different ways. Scientists use these differences to make models. For example, how a rubber band stretches helps you "see" the force acting on it. How could you use space relationships to model Earth and its moon?
Wednesday, March 24, 2010 at 8:55pm

algebra
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 ...
Tuesday, March 23, 2010 at 9:17pm

algebra
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 ...
Tuesday, March 23, 2010 at 8:58pm

Environmental Science
For my research paper on Coral Reefs, can someone please help me write an intro paragraph? I think I should first start by writing a thesis statement, although I'm not sure if thesis statements are required in research papers. If so, please help me. This is the info I'...
Tuesday, March 23, 2010 at 12:13pm

ALGEBRA
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 object follows this equation: , where C is a constant, and...
Tuesday, March 23, 2010 at 7:40am

Environmental Science
For my research paper on Coral Reefs, can someone please help me write an intro paragraph? I think I should first start by writing a thesis statement, although I'm not sure if thesis statements are required in research papers. If so, please help me. This is the info I'...
Monday, March 22, 2010 at 3:40pm

thank you for you time i just want to see if i did my work correct.i will put the questions and answers and on the bottom of that i will put my answer. now as the train bears west, its rhythm rocks the earth, and from my Pullman berth i stare into the night while others take ...
Monday, March 22, 2010 at 11:14am

Alegbra
Suppose it takes 3 days for a space vehicle to travel from earth to the moon. How long for the same vehichle and the same speed to reach Jupiter? Moon distance from earth is 240,000 miles. Jupiter distance from earth is 391,000,000 miles
Saturday, March 20, 2010 at 4:45pm

earth
in the layer ofsedimentary rocs the oldest can be find in where
Saturday, March 20, 2010 at 10:23am

physics
Evidence suggests that there are trillions of dollars' worth of minerals and metals buried in Near Earth Asteroids (the ones that come close to the Earth, not the ones in the asteroid belt between Mars and Jupiter). Many scientists think an asteroid mining mission is ...
Thursday, March 18, 2010 at 7:24pm

sicence
Select all of the answers that apply. A map _____. 1)is a representation of the earth's surface 2)is a portable document describing an area 3)can provide data such as migration trends, directions, and rock composition 4)provides all of the information about a location
Thursday, March 18, 2010 at 7:01pm

Science
Trying to complete a word search. What is a 6-letter word for "State of water that is most common on Earth's surface"
Wednesday, March 17, 2010 at 9:36pm

Science
1. Temperature cools about 6.5 degrees Celsius per kilometer of _______. 2. ___________ from 10 km to 50 km about Earth, this layer contains ozone that absorbs much of the Sun's ultraviolet radiation. It contains most clouds and ____________. 3. _______ layers include the ...
Monday, March 15, 2010 at 11:09pm

Environmental Science
Research Paper I need to write a research paper on coral reefs. i need to compose a research paper that deals with coral reefs and addresses enough of the questions below in order to meet the minimum page requirements for the paper (3-4 double spaced pages) Explain what a ...
Monday, March 15, 2010 at 8:31pm

Exploring Space
what wud hold the cable of a space elevator up? Would it be earth's gravity holding the cable of a space elevator up?
Monday, March 15, 2010 at 8:10pm

Exploring Space
Why do astronauts appear to float when they aboard the ISS station and experience 90% of earth's gravitational pull? Is it because of the freefall?
Monday, March 15, 2010 at 7:41pm

Exploring Space
if a satellite were to be launched with too little speed or too much speed then what would happen? If a sattellite were to be launched with too much speed then the friction in the air would make it heat up to the point where it would burn up. Earth's gravity wouldn't ...
Monday, March 15, 2010 at 7:25pm

physics
A space station is shaped like a ring and rotates to simulate gravity. If the radius of the space station is 150 m, at what frequency must it rotate so that it simulates Earth's gravity? [Hint: The apparent weight of the astronauts must be the same as their weight on Earth...
Saturday, March 13, 2010 at 11:34pm

Physics
A satellite of mass 220 kg is launched from a site on Earth's equator into an orbit at 200 km above the surface of Earth. (a) Assuming a circular orbit, what is the orbital period of this satellite? 5310 s (b) What is the satellite's speed in its orbit? 7790m/s (c) ...
Saturday, March 13, 2010 at 8:28pm

Chemistry
A gas-filled balloon having a volume of 3.50 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are −23°C and 3.00 10−3 atm, respectively. Calculate the final volume of ...
Friday, March 12, 2010 at 8:14am

science
The earth exerts a force of 2200N on an orbiting communications satellite that is 35mi above the earth..What is the magnitude of the force the satellite will exert on the earth??
Thursday, March 11, 2010 at 10:04pm

Physics
what is the weight of a 10kg object on the moon if it is 1/6 that of the earth?
Thursday, March 11, 2010 at 8:34pm

Incorrect comma usage?-
This begins with the titan Cronos’ mother, Earth, who encourages her children to overthrow their father, Heaven, because out of dislike, he keeps them locked away. does this look right?
Thursday, March 11, 2010 at 5:03pm

physics
A helium balloon and its gondola, of mass M, are in the air and stationary with respect to the ground. A passenger, of mass m, then climbs out and slides down a rope with speed v, measured with respect to the balloon. With what speed (relative to Earth) does the balloon then ...
Thursday, March 11, 2010 at 4:57pm

classroom instruction
Teachers do need to establish ground rules about discussion: students should learn to listen politely to each other, and to agree to differ on occasion. Teachers can model calm and polite behavior, without giving in to irrationality. It is important to make clear to children ...
Wednesday, March 10, 2010 at 10:58pm

physics
The MASS OF A SATELLITE IS 2000Kg .DETERMINE THE WEIGHT OF OF THE THE SATELLITE WHEN IT IS (i)resting on the earth (ii) 1000km above earth surface
Wednesday, March 10, 2010 at 4:29am

Physics
How far from the center of the earth must a person be located in space so t hat his/her weight would be the same as when he/she is standing on the moon?
Tuesday, March 9, 2010 at 5:54pm

Earth Science
Judging from the sizes of the before-and-after craters atop Mount St. Helens (Figs. 4.8 and 4.9 of the Lab book), which volcanic event appears to have been the more explosive, the last one before 1980, or that which occurred in 1980
Monday, March 8, 2010 at 7:40pm

English
Can you check these sentences for me, please? Thank you very much in advance. 1) Beowulf and the Dragon wrestle amid sheets of fire. As the flames billow, Beowulf's companions rush away in terror. 2) Only one, Wiglaf, feels enough loyalty to come to the aid of his king. 3...
Monday, March 8, 2010 at 9:56am

sicence
Select all of the answers that apply. A map _____. 1)is a representation of the earth's surface 2)is a portable document describing an area 3)can provide data such as migration trends, directions, and rock composition 4)provides all of the information about a location
Monday, March 8, 2010 at 8:56am

physics
How do I go about in solving this? A spy satellite is in circular orbit around Earth. It makes one revolution in 6.01 hours. (a) How high above Earth's surface is the satellite? ___ km (b) What is the satellite's acceleration? ___m/s2
Sunday, March 7, 2010 at 11:35pm

Physical Science
A rocket moves through outer space at 11,000 m/s. At this rate, how much time would be required to travel the distance from Earth to the Moon, which is 380,000 km?
Saturday, March 6, 2010 at 6:13pm

Physical Science
How much would 80.0 kg person weight (a) on Mars, where the acceleration of gravity is 3.93 m/s2, and (b) on Earth's Moon, where the acceleration of gravity is 4.63 m/s2?
Saturday, March 6, 2010 at 6:09pm

algebra
The weight of an object follows the equation w=Cr^-2, where C is the constant and r is the distance the object is from the center of the earth. a. solve the equation for r. b. Suppose the object is 100 pounds when at sea level. Find the value of C that makes the equation true...
Saturday, March 6, 2010 at 5:27pm

Physics
A space station is shaped like a ring and rotates to simulate gravity. If the radius of the space station is 120 m, at what frequency must it rotate so that it simulates Earth's gravity? [Hint: The apparent weight of the astronauts must be the same as their weight on Earth.]
Saturday, March 6, 2010 at 2:37am

Physics
Calculate the magnitude of the linear momentum for the following cases. the Earth (mass = 5.98*1024 kg) moving with an orbital speed equal to 2.98*10^4 m/s. so i did 5.98*10^24 times 2.98*10^4=1.78204 × 10^29 But homework website doesn't accept this answer...is there...
Friday, March 5, 2010 at 11:51pm

CHEMISTRY
The atmosphere contains about 6.8×1013 moles of ozone. If this amount of ozone gas is compressed into a thin layer around the globe (the radius of Earth is 6370 km) at STP (Standard Temperature (0°C) and Pressure (1.0 atm.)), how thick will the layer be in millimeter...
Friday, March 5, 2010 at 3:10pm

Physics
A particle of mass m is shot with an initial velocity vector v i and makes an angle θ with the horizontal, as shown below. The particle moves in the gravitational field of the Earth. (makes a shape of a parabola)Find the angular momentum of the particle about the origin ...
Thursday, March 4, 2010 at 9:56pm

Universe and Stars
As u look at the stars that re beyond and farther away, what occurs to the angle measured at earth? at what point will this method no longer work? Someone please help explain
Thursday, March 4, 2010 at 7:20pm

earth
if the illustration is the effect of freezing water on rock what term best decribe the process?
Wednesday, March 3, 2010 at 8:04pm

Physics
What is the apparent weight of a 75 KG astronaut 4200 km from the center of the earth's moon in a space vehicle.a) moving at constant velocity, and b) accelerating toward the moon at 209 m/s? state the direction in eachcase
Wednesday, March 3, 2010 at 4:54pm

science
my first is VAN but not in PAN,my second is EARTH and also in HEAVEN,my third is ONE and not in two,my fourh is in BUN and also in FUN,my last is in STAR but not in RADAR,i am a planet that moves round the sun.name the planet.
Wednesday, March 3, 2010 at 10:23am

Physics
A melon of weight 12 N (near the surface of Earth) is moved through a displacement of magnitude 1.00 m. What happens to the gravitational potential energy (of the melon/Earth system) due to this displacement.
Wednesday, March 3, 2010 at 1:43am

Physics
A spy satellite is in circular orbit around Earth. It makes one revolution in 6.04 hours. (a) How high above Earth's surface is the satellite? (b) What is the satellite's acceleration?
Tuesday, March 2, 2010 at 7:51pm

Physics
What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)
Tuesday, March 2, 2010 at 4:57pm

College Physics
Gravity on the surface of the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 14 kg object on the Earth? The acceleration of gravity is 10m/s2 . Answer in units of N.
Tuesday, March 2, 2010 at 12:59pm

College Chemistry
I am trying to figure out how many minutes are required for sunlight to travel from the Sun to Earth? Assuming the sun is 93,000,000 miles from Earth and that sunlight travels at 1.86x10 to the 5th power miles per second. These things are so tricky, i know i have to convert ...
Monday, March 1, 2010 at 11:46pm

Earth and space science
what features are associated with subduction zones?
Monday, March 1, 2010 at 7:49pm

science
Are there any questions on earth that haven't been answered or are to compicated for scientists to get to or understand?
Monday, March 1, 2010 at 6:20pm

Environmental Science
True or False: 28. Hydroelectric energy is produced by flowing water turning a turbine which generates electricity. TRUE 32. Geothermal energy is generated when heated water or steam is pumped up from inside the Earth to power a turbine that generates electricity. TRUE Am I ...
Monday, March 1, 2010 at 3:09pm

chemistry 106
A gas-filled balloon having a volume of 1.50 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°C and 3.00 multiplied by 10-3 atm, respectively. Calculate the final volume of...
Sunday, February 28, 2010 at 11:13pm

Pages: <<Prev | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | Next>>