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April 19, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

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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
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 ...
Tuesday, April 27, 2010 at 5:54pm

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

Science
I assume that you mean on Earth under ambient conditions? In that case as a gas.
Tuesday, April 27, 2010 at 7:56am

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

5th grade
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

Question about Canadian University (general).
Western - medicine Toronto - very good, huge Queens - elitist, quite good Waterloo - none better in Math, Computer Science, Engineering, pioneered co-op in Engineering. British Columbia - very good Dalhousie - Marine studies Personally, I graduated from Waterloo, in the second...
Saturday, April 24, 2010 at 7:44am

Physics
I can't believe they did not give you the units (dimensions) of acceleration along the number. In physics, that is a no-no. I will assume the units are m/s^2. The acceleration of the moon toward the Earth is V^2/R = 2.7*10^-3 m/s^2 Since they told you the value of R, you ...
Friday, April 23, 2010 at 12:47am

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
....then slowly earth could be known as heaven is the ending I have good? Or could I change it to what I have listed above? Any other suggestions would be appreciated.
Thursday, April 22, 2010 at 9:07pm

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
We are assuming that Ellen is on earth? In that case F = G Mellen Mmoon /d^2 = (6.67*10^-11)(47)(7.35*10^22)/(3.84*10^8​)^2
Wednesday, April 21, 2010 at 7:52pm

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
For each reaction,there is an equal and opposite..... ForceEarth=-Forcestudent massEarth*acceleration= massStudent*g acceleration= massSTudent/massEarth * 9.8m/s^2
Tuesday, April 20, 2010 at 8:36am

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
Weight=GravitationalField*mass on Earth, gravitational field g=9.8N/kg Here, on this planet it is g=26.4N/kg Weight=mass*g= 900/9.8 * 26.2 N
Monday, April 19, 2010 at 11:29pm

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
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 ...
Monday, April 19, 2010 at 6:04pm

Physics
If the spacecraft is in a low Earth circular orbit, the probe would return to the spacecraft with the same velocity if the probe were launched into an elliptical orbit having a period of 2, 4, 8, etc. times the period of the launching spacecraft. For instance, if the ...
Monday, April 19, 2010 at 5:14pm

earth
For the first part of your post, try here: http://search.yahoo.com/search?fr=mcafee​&p=how+earth%27s+gravity+effects+you+in+​space And for the 2nd part, here: http://search.yahoo.com/search?fr=mcafee​&p=at+what+altitude+does+Earth%27s+gravi​ty+have+no+...
Monday, April 19, 2010 at 4:46pm

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
Check some of the sites here: http://search.yahoo.com/search?fr=mcafee​&p=does+the+weight+of+an+object+change+a​t+different+points+on+the+earth Sra
Sunday, April 18, 2010 at 2:08pm

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

Physics
Not necessarily. If the spacecraft and probe are free from the Earth's gravitational field, and the launch speed is slow enough, the probe can return eventually due to the gravitational attraction between spececraft and probe. However, it might take more or less than a day...
Sunday, April 18, 2010 at 9:46am

science
You just did. You need to specify the vertical component of velocity. Rockets do not typically accelerate horizontally, unless they are changing orbit altitude. Any rocket that is travelling that slowly (5 m/s) will start falling quickly to the earth.
Saturday, April 17, 2010 at 7:10am

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
(a) The relative velocity of the students with respect to the proctors can be calculation from the relative velocity addition formula Vsp = (Vs + Vp)/[1 + VsVp/c^2] = 0.92c/1.1792 = 0.7802c Rest-frame exam time as measured by the students will be longer than 65 minutes, as ...
Friday, April 16, 2010 at 1:12pm

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
whats the distance from the center of the earth?
Thursday, April 15, 2010 at 11:47pm

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

science
Inthe prosess of photosynthesis plants 1.cnvert inorganic substances to organic substances. 2.cange light energy to chemical(food)energy 3.produse oxygen 4.play arole for resycling of water and carbon dioxide. All of these are necessary for the cntinity of life on the earth.
Thursday, April 15, 2010 at 6:14am

Physics
To reduce the value of g by 5.5%, reduce the distance from the center of the Earth by 5.5%. That will mean going down about 350 km.
Thursday, April 15, 2010 at 4:32am

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

how the earth was made
What does the word dinosaur mean? What do you think a dinosaur is. Go on dictionary. c o m and look up that word. It is an extinct reptile. An extinct, chiefly terrestrial reptile that lived in the Mesozoic Era. Some dinosaurs were the largest known land animals. Order: ...
Wednesday, April 14, 2010 at 11:04pm

how the earth was made
You could go on google videos or youtube and type in how the earth was made. The video which you watched may not appear, but I'm sure that videos similar to earth will, and you may be able to find your answers hidden in them. Good Luck. BTW- if I were you, I'd be ...
Wednesday, April 14, 2010 at 11:01pm

how the earth was made
52. Death and taxes will continue. The Cubs will win a pennant. Do you really expect us to do your homework and take your tests for you?
Wednesday, April 14, 2010 at 9:17pm

how the earth was made
We didn't see this video, so we can't help you.
Wednesday, April 14, 2010 at 8:23pm

how the earth was made
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
Here is a great deal of information on the Space Shuttle: http://search.yahoo.com/search?fr=mcafee​&p=how+space+Shuttle+lands+on+Earth Sra
Wednesday, April 14, 2010 at 8:12pm

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

phys science
Isn' the force of gravity proportional to distance squared? I am uncertain what into space 3x radiusearth means? is that the altitude, or the distance from the center of the Earth? If altitude, 1/3^2 is how much it decreases. If distance from center of earth, 1/4^2
Tuesday, April 13, 2010 at 3:25pm

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

science
The sun does not orbit Jupieter. Jupiter orbits the sun. When a planet such as Jupiter returns to the same point in the sky, relative to the star background, its exact location will also be affected by the Earth's location at that time. It can also be above or below the ...
Monday, April 12, 2010 at 5:36pm

earth
effect is the right word. The sun's affect on the tides would not effect a change in height, but the Moon, which is the predominate tidal factor, would affect the tides by the inverse of the change in gravity, that is 1/(2/.23)^2. So the effect would be to greatly decrease...
Monday, April 12, 2010 at 3:47pm

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

6th grade science
I have asked people this question and the told me to go to people who no so I came hear so hear I go if the earth is a curcle who is up side down? do they no they are up side down? these are great qustions please help me!!!!!!!! thanks katie
Monday, April 12, 2010 at 1:32pm

college Physics
Good question. You can get the latitude with a Foucault pendulum (and a clock to figure out how much the plane of oscillation rotates in 24 hours.) But it won't tell you where North is. You could use an electromagetic method to MAKE a compass needle, or just flip a wire ...
Monday, April 12, 2010 at 12:49pm

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

earth radius
6.4 * 10^6 not 3.4 *10^6 (remembered Mars, not earth)
Sunday, April 11, 2010 at 2:54pm

Physics
Radius of earth = about 6.4*10^6 meters circumference = 2 pi r time = distance/speed = 2 pi r/343
Sunday, April 11, 2010 at 2:53pm

physics
w = 2 pi/24 radians.hr = 2 pi/(24*3600) radians/second R = earth radius in meters (3.4*10^6 m) r = distance from spin axis of earth = R * cos (latitude)
Sunday, April 11, 2010 at 1:48pm

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
Have you tried subtracting the radius of the Earth? They asked for the altitude. "r" is the distance from the center of the Earth.
Saturday, April 10, 2010 at 7:55pm

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
all soil is layered, all sediment is layered. If you look, you see.
Friday, April 9, 2010 at 5:47pm

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

physics
Make an approximating assumption by modeling the deposited water as an effective extra uniform surface density of negligible thickness added to the surface. The surface densisty is then: sigma = M_ice/(4 pi R^2) where M_ice = 2.76E+19 kg and R is the radius of the Earth. You ...
Friday, April 9, 2010 at 1:23pm

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

Greenhouse effect
Many neat facts in these sites -- (Broken Link Removed) http://eo.ucar.edu/kids/green/warming4.h​tm http://images.google.com/images?hl=en&rl​z=1G1GGLQ_ENUS374&q=greenhouse+effect+ki​ds&um=1&ie=UTF-8&ei=21W-S_LfIoX7lwer_f3l​Bg&sa=X&oi=image_result_group&...
Thursday, April 8, 2010 at 6:19pm

Earth science
If I remember my geology lesson correctly, Earth's layers are from center to the top: inner core outer core lower mantle upper mantle astenosphere mantle crust lithosphere
Thursday, April 8, 2010 at 2:20pm

Earth science
That would be the outer core.
Thursday, April 8, 2010 at 2:15pm

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

physics
V = sqrt(GM/r) GM = 3.986x10^14 V = 4390 r = 3.986x10^14/4390^2 = 20,682,748.6m = 20,682.7km Earth radius = 6378km Orbital altitude h = 20,682.7 - 6378 = 14,394.7km. The time it takes a satellite to orbit the earth in a circular orbit, its orbital period, can be calculated ...
Thursday, April 8, 2010 at 10:04am

earth science
Try some of these sites: http://search.yahoo.com/search;_ylt=A0oG​kwxvVL1LGPMA8WNXNyoA?p=if+continental+cr​ust+were+thinner+what+happens+to+the+man​tle&fr2=sb-top&fr=mcafee&sao=1 Sra
Wednesday, April 7, 2010 at 11:59pm

earth science
More information here: http://search.yahoo.com/search?fr=mcafee​&p=rules+to+remember+when+reading+topogr​aphic+maps Sra
Wednesday, April 7, 2010 at 11:57pm

earth science
i think its one and fore
Wednesday, April 7, 2010 at 9:42pm

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

English-Friendship Poem
You're doing fine, Sara. The title is like the first line of the poem. The rest of the lines complete the thought -- if you don't come. The whole poem is an extended metaphor. Obviously the earth won't actually change if the friend doesn't come.
Wednesday, April 7, 2010 at 8:24pm

Earth Science
Here's a search on "what is a map?"" http://search.yahoo.com/search?fr=mcafee​&p=what+is+a+map Sra
Wednesday, April 7, 2010 at 7:27pm

earth science
scale, legend,title, and some form of compass
Wednesday, April 7, 2010 at 4:51pm

physics
I tried to use V^2/r = GM(earth)/r^2 but I am not getting the correct answer.
Wednesday, April 7, 2010 at 1:31pm

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