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Homework Help: Science: Earth

Recent Homework Questions About Earth

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Chem
The space probe Pioneer 11 was launched April 5,1973, and reached Jupiter in December 1974 traveling a distance of 998 million km. How long did it take an electromagnectic signal to travel to earth from Pioneer 11 when it was near Jupiter. The speed of light is, for all ...
Saturday, November 3, 2007 at 4:42pm

PHYSCIS FO SHIZZLE
Hello, I was wondering how to explain the potential energy in a Ferris wheel, and if there were any reputable (aka not something such as Wikipedia, etc) that had an explanation for this? The only thing I have gathered is that mgh=Eg and that Eg is the energy stored in the ...
Friday, November 2, 2007 at 8:39pm

Physics questions
Hello, I was wondering how to explain the potential energy in a Ferris wheel, and if there were any reputable (aka not something such as Wikipedia, etc) that had an explanation for this? The only thing I have gathered is that mgh=Eg and that Eg is the energy stored in the ...
Friday, November 2, 2007 at 7:11pm

Chemistry
The space probe Pioneer 11 was launched April 5,1973, and reached Jupiter in December 1974 traveling a distance of 998 million km. How long did it take an electromagnectic signal to travel to earth from Pioneer 11 when it was near Jupiter. Where do I begin???
Thursday, November 1, 2007 at 9:32pm

Chem
The space probe Pioneer 11 was launched April 5,1973, and reached Jupiter in December 1974 traveling a distance of 998 million km. How long did it take an electromagnectic signal to travel to earth from Pioneer 11 when it was near Jupiter.
Thursday, November 1, 2007 at 6:11pm

geophysics
how would you exaplain how and why each of the four moon phases appear to look like they do to us here on earth?
Tuesday, October 30, 2007 at 8:30pm

science
Explain the main factors that affect the Earth’s temperature.
Monday, October 29, 2007 at 10:09pm

Physics
the hubble telescope has a mass of 1.5 x 10^4 kg and its orbiting the earth 596 km above the ground surface.the earths radius is 6.38 x 10^3km. CAlculate a)the force of gravitation on the telescope due to the earth's pull. given: G=6.67 x 10^-11Nm/kg and the mass of earth ...
Monday, October 29, 2007 at 3:53pm

Earth Science
Differentiate the composition and texture of a plutonic igneous rock and a volcanic igneous rock.
Saturday, October 27, 2007 at 3:12pm

Earth Science
Compare the classification of minerals with the classification of rocks.
Friday, October 26, 2007 at 1:36pm

Scienc
World poplation grow each year,does this mean the mass off earth increases each year? Why?
Thursday, October 25, 2007 at 10:21am

Sciece
How do scientist on earth communicate with a space probe?
Tuesday, October 23, 2007 at 9:44pm

Science
How does the Sun's rays hitting the Earth affect the seasons?
Monday, October 22, 2007 at 9:11pm

Cultural Diversity
Would someone please check my answers, and let me know your opinion on what I have wrong. 1. The term ethnocentrism applies to which of the following situations? A. Jack O'Shea tells everone that the Irish are the best people on God's green earth. B. An Asian family&#...
Monday, October 22, 2007 at 4:09pm

physics
The earth moves around the sun in a nearly circular orbit of radius 1.50*10^11m. During the three summer months (an elapsed time of 7.89*10^6s), the earth moves one-fourth of the distance around the sun. (a)what is the average speed of the earth? (b) what is the magnitude of ...
Sunday, October 21, 2007 at 4:51pm

Music
I want to make a song with the theme of "Planet Earth", although I'm not good at singing, so I'm just looking for a beat song. Can anyone of you suggest a genre or what instruments should I use?
Saturday, October 20, 2007 at 3:21pm

earth science repost!!!
Hi, I was just wondering how an eroding dune and a non-eroding dune would differ, in terms of diagrams. For example, is there any site that would compare two cross-sectional shapes of the dunes? I couldnt find any on google.
Thursday, October 18, 2007 at 6:47pm

BIOLOGY/EARTH SCIENCE
Hi, I was just wondering how an eroding dune and a non-eroding dune would differ, in terms of diagrams. For example, is there any site that would compare two cross-sectional shapes of the dunes? I couldnt find any on google.
Thursday, October 18, 2007 at 6:17pm

Earth Science
1.A trench is associated with which plate boundaries. Oceanic-oceanic convergence, hot spot, divergent boundary, oceanic-continental convergence, continental-continental convergence. My answer is divergent boundary. Is this correct? 2. A rift valley extending thousands of ...
Thursday, October 18, 2007 at 8:41am

physics help
Larry weighs 300 N at the surface of the earth. what is the weight of the earth in the gravitational field of Larry? -would it still be 300 N
Wednesday, October 17, 2007 at 10:22am

Physics repost
I apologise for reposting this question but it is still not working out for me. I know that: speed of light c=3.0x10^8 Time interval delta t=0.19x10^-9s The relationship between actual time and roudtrip distance is d=ct Also if there is and uncertainty of delta time, then it ...
Wednesday, October 17, 2007 at 10:04am

Earth Science REPOST
A seismograph station is located 2000 km from an earthquakes epicenter. Explain the order that the S and P waves will arrive at the station.
Wednesday, October 17, 2007 at 7:40am

phy.
Larry weighs 300 N at the surface of the earth. what is the weight of the earth in the gravitational field of Larry? -force= GMm/d^2 would i set it up like force= (9.8m/s^2)(300 N)? an astronaut lands on a planet that has twice the mass as earth and twice the diameter. how ...
Tuesday, October 16, 2007 at 9:33pm

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

Earth Science
A seismograph station is located 2000 km from an earthquakes epicenter. Explain the order that the S and P waves will arrive at the station.
Tuesday, October 16, 2007 at 10:52am

Physics repost please clarify
The distance between earth and the moon can be determined from the time it takes for a laser beam to travel from earth to a reflector on the moon and back. If the round-trip time can be measured to an accuracy of 0.19 of a nanosecond (1 ns = 10-9 s), what is the corresponding ...
Tuesday, October 16, 2007 at 1:07am

Physics/Barycentre
I read the Earth/Moon Barycentre is located 74/100ths from the centre of the earth towards the earths surface. As the moons orbit varies from Perigee to Apogee by more than 30,000 miles I would have thought the Barycentre would move around according to the moons position in ...
Monday, October 15, 2007 at 1:48pm

Physics
I studied the equation of time recently and understand the Earths keplerian orbit is responsible for it. I understand the keplerian orbit described the Earths elliptical path and it was this alone that created the equation of time. I have just read that the Earth does not ...
Monday, October 15, 2007 at 2:52am

Physics please help!
The distance between earth and the moon can be determined from the time it takes for a laser beam to travel from earth to a reflector on the moon and back. If the round-trip time can be measured to an accuracy of 0.19 of a nanosecond (1 ns = 10-9 s), what is the corresponding ...
Sunday, October 14, 2007 at 11:35pm

Science
I need help writing a procedure for my Earth Science class. Our teacher gave us 5 minerals and told us 5 mineral names, but we have to figure out which is which. We could do tests like specific gravity, luster, streak, and hardness. I decided to do hardness and streak. I wrote...
Sunday, October 14, 2007 at 3:36pm

Science
I need help writing a procedure for my Earth Science class. Our teacher gave us 5 minerals and told us 5 mineral names, but we have to figure out which is which. We could do tests like specific gravity, luster, streak, and hardness. I decided to do hardness and streak. I wrote...
Sunday, October 14, 2007 at 2:48pm

Physics
The distance between earth and the moon can be determined from the time it takes for a laser beam to travel from earth to a reflector on the moon and back. If the round-trip time can be measured to an accuracy of 0.19 of a nanosecond (1 ns = 10-9 s), what is the corresponding ...
Saturday, October 13, 2007 at 6:52pm

Physics/Moons Orbit
The Moon describes an elliptical path around the Earth and a complete orbit is 29d 12h 44m 3s Approximately! At its closest during this orbit it is termed Perigee and at its farthest Apogee. However there must be 2 other points opposite Perigee & Apogee where the moon is at ...
Saturday, October 13, 2007 at 12:50pm

calculus
newtons law of gravitation says that the magnitude F of the force exerted by a body of mass m on a bod of mass M is F=GmM/r^2 where G is the gravitational constant and r is the distance between the bodies. a)find dF/dr and explain its meaning. What does te minue sign mean? b)...
Thursday, October 11, 2007 at 11:55pm

Math
The average radius r in meters of a planet's path around the sun is given by the formula r=[(3.35 x 10^18)t^2]^1/3, where t is the time in seconds that it takes the planet to go around the sun. a. Rewrite the equation using the root symbol. b. Neptune takes about 5.2 x 10^...
Thursday, October 11, 2007 at 8:54pm

science
Explain why all life on earth is ultimately dependent on a continued supply of sunlight?
Wednesday, October 10, 2007 at 6:24am

Science
what are some possible effects of climate change resulting from a warmer earth?
Tuesday, October 9, 2007 at 1:39am

Physics
A space station is shaped like a ring and rotates to simulate gravity. If the radius of the space station is 140 m, at what frequency must it rotate so that it simulates Earth's gravity?
Tuesday, October 9, 2007 at 12:02am

Physics
A track star in the long jump goes into the jump at 12 m/s and launches herself at 20 degrees above the horizontal. How long is she in the air before returning to Earth? (g= 9.81 m/s squared) I tried using some formulas but I'm using all of the wrong formulas for this ...
Sunday, October 7, 2007 at 6:46pm

Physics/Nautical Mile
Still studying! I have The Macmillan & Silk Cut Nautical Almanac from 1981 which pre-dates WGS84 and they make reference to the NM being 6046 feet at the equator and 6108 feet at the poles. Conversions to metres = 1842.82m and 1861.71m. Remarkably similar to WGS84 derived ...
Sunday, October 7, 2007 at 4:06am

biology
how does the extinction of dolphins affect the sustainability of the Earth?
Sunday, October 7, 2007 at 12:41am

Physics
What does it mean to say that angular momentum is conserved? Give an example you might see on Earth. How could conservation of angular momentum help astronomers understand the development of the solar system? (this the part of the question that I dont understand)
Saturday, October 6, 2007 at 10:18pm

Physics
Which of the following statements for magnetism are true? (Give ALL correct answers) A) B does work on a charge only when the charge has a velocity component perpendicular to B. B) B acts only on charges at rest. C) B does work on a charge only when the charge has a velocity ...
Saturday, October 6, 2007 at 9:39am

Physics/Nautical Mile
My previous posts have dramatically improved my understanding of how a NM is derived but other questions have been raised: In most books entitled "Pass your Day Skipper" or "Yachtmaster" or similar nautical/navigational publications Latitude is described ...
Saturday, October 6, 2007 at 2:56am

Phyics
I have a few questions that I need help with please. Show by algebraic reasoning that your gravitational acceleration toward an object of mass M a distance d away is a = GM/d2 and therefore doesn’t depend on your mass. (I dont understand this question) What does it mean ...
Friday, October 5, 2007 at 8:59pm

Physics
1.A race car has a mass of 707 kg. It starts from rest and travels 42.0 m in 3.0 s. The car is uniformly accelerated during the entire time. What net force is exerted on it? 2.A 4430 kg helicopter accelerates upward at 2.2 m/s2. What lift force is exerted by the air on the ...
Friday, October 5, 2007 at 12:54pm

Physics
The Nautical Mile is internationally recognised as 1852m which is an approximation of 1' of latitude subtended to the earths surface. However it is an average and the geographical length on the earths surface of 1' of lat subtended will vary according to the radius of ...
Friday, October 5, 2007 at 4:45am

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

earth science
i need to know where i can find the brief mythology of the constallation capracornus([[[capricorn]]]) and the constellations inside the capricornus and the type of star they are and the distance from earth and the magnitude(absolute) and the color and suface tempeture of the ...
Wednesday, October 3, 2007 at 7:42pm

physics
1. What is the acceleration on the Earth? Remember the equation for an object that starts at rest is this: d = 1/2at2 ( this is an experiment for droping a ball from a 6 meter hight and seeing how long it takes to get to the floor from 6 meters, it took 1.9 seconds to reach ...
Wednesday, October 3, 2007 at 1:01pm

language
is this a sentace......... A block of four different,colorful stamps that commemorate Earth day.
Tuesday, October 2, 2007 at 9:48pm

earth`s changing surface
land formed by a river`s deposition of eroded soil and others materials
Tuesday, October 2, 2007 at 9:25pm

earth`s changing surface
the process of moving weathered rock and soil
Tuesday, October 2, 2007 at 9:03pm

earth`s changing surface
the process that changes what rock is made of
Tuesday, October 2, 2007 at 9:02pm

earth`s changing surface
the process that changes the size and shape of rock
Tuesday, October 2, 2007 at 8:51pm

earth`s changing surface
the process that breaks down and changes rock
Tuesday, October 2, 2007 at 8:49pm

geography
what do you see on the surface of the earth?
Monday, October 1, 2007 at 8:13pm

Earth Science
Where are new volcanoes forming in Hawaii? I know the new volcanoe is Loihi but I'm not sure where it is forming.
Monday, October 1, 2007 at 1:26pm

Earth Science
Do the Hawaiian islands appear to be the same age or are they older at one end of the chain or another?Explain. I know the islands aren't the same age but I don't know how to tell which end of the chain has older islands.
Monday, October 1, 2007 at 1:23pm

Physics
The acceleration due to gravity on the Moon is 1/6 of that of the Earth. Given the same initial velocity: How much higher will an object displace on the Moon? How much more time will it spend in the air?
Monday, October 1, 2007 at 7:31am

Physic please help!
The electrons in the beam of a television tube have a kinetic energy of 2.10 10-15 J. Initially, the electrons move horizontally from west to east. The vertical component of the earth's magnetic field points down, toward the surface of the earth, and has a magnitude of 5....
Saturday, September 29, 2007 at 9:32am

Physics
Due to friction with the air, an airplane has acquired a net charge of 1.70 10-5 C. The plane moves with a speed of 3.15 102 m/s at an angle with respect to the earth's magnetic field, the magnitude of which is 5.00 10-5 T. The magnetic force on the airplane has a ...
Thursday, September 27, 2007 at 9:01pm

Physics
A jumper in the long-jump goes into the jump with a speed of 10m/s at an angle of 30 degrees above the horizontal. Use g=10m/s. a) how long in the air is the jumper before returning to the Earth? b) How far does the jumper jump? for a) I got .001s as the answer which logically...
Wednesday, September 26, 2007 at 1:25pm

Science
At what latitude (on Earth) is the elevation of the South Celestial Pole greatest?
Tuesday, September 25, 2007 at 10:14pm

Physical Science
This is the question in my homework: In orbiting the Earth, what kind of motion is it, uniformly velocity, uniformly accelerated or non-uniformly accelerated motion? I have searched for almost an hour on the internet in any variety of those terms I could think of, and I still ...
Tuesday, September 25, 2007 at 8:46pm

Physics
A jumper in the long-jump goes into the jump with a speed of 10m/s at an angle of 30 degrees above the horizontal. Use g=10m/s. a) how long in the air is the jumper before returning to the Earth? b) How far does the jumper jump? for a) I got .001s as the answer which logically...
Tuesday, September 25, 2007 at 7:51pm

world history
where on earth is a place that is uninhabited by humans... in other words... where can a civilization not exist???
Tuesday, September 25, 2007 at 6:40pm

earth science
hi im supposed to create a children’s story about Roger the Rock. Roger is a rock that has been a part of the rock cycle for millions of years. Your job is to tell Roger’s story. What volcanoe he came from and where he lived. You must describe how Roger was “...
Tuesday, September 25, 2007 at 12:24am

Honors Pre-Calculus
The latitude of Durham, North Carolina is 36 degrees North. About how far from Durham is the North Pole? Use 3963 miles for the radius of the Earth. I believe there is a formula of s=r times the feta angle, but you may have to convert the degrees to radians. I'm not sure ...
Monday, September 24, 2007 at 5:11pm

Physical Science
My homework is to do some exercises on the Foucault Pendulum. I'm stuck on several of the problems. One is to find the approximate angle of rotation of the earth in one day at our latititue, which is 39.9. I found the equation n = 360 sin of latitude, but I have no idea ...
Sunday, September 23, 2007 at 3:45pm

Chemistry
would the density of a person be the same on the surface of earth and on the surface of the moon? explain?
Thursday, September 20, 2007 at 9:01pm

Physics
A helicopter is ascending vertically with a speed of 3.00 m/s. At a height of 70 m above the Earth, a package is dropped from a window. How much time (in seconds) does it take for the package to reach the ground? [Hint: The package's initial speed equals the helicopter'...
Wednesday, September 19, 2007 at 11:37pm

Social Studies
What are the physical features of the earth's surface called?
Tuesday, September 18, 2007 at 10:34pm

earth science
What does -morph stand for in science terms?
Tuesday, September 18, 2007 at 10:24pm

science
If the earth's axis was tilted at 30 degrees instead of 23 1/2 degrees, how would that effect the seasons, or lengths of days, winds, etc. Or, would it have any effect at all?
Tuesday, September 18, 2007 at 7:44pm

social studues
what are the advantages and disadnavtages of using a globe to show earth surface
Tuesday, September 18, 2007 at 4:01pm

Earth Science
Can someone point me in the direction of information relating to: "Which earth spere is most affected by pollution?" I am leaning to atmosphere - due to global warming, but I would like to do more research. Thanks for the help.
Tuesday, September 18, 2007 at 1:09pm

Algebra
The Circumference and area of a circle of radius r are givin by 2 [pie] r and [pie] r[2], respectively use 3.14 for the constant [pie] A. What is the circumference of a circle with a radius of 2 m? B.What is the area of a circle with a radius of 2 m? C. The earth has a radius ...
Monday, September 17, 2007 at 5:28pm

English
I need to find the subject and the verb in each sentence. If the subject is understood, write (you). Can someone tell me if I am on the right track? 1.Have you ever heard stories about dragons? Subject-dragons, verb-stories 2.Picture a yellow-speckled, olive-green creature ...
Sunday, September 16, 2007 at 7:49pm

Physics
A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?
Sunday, September 16, 2007 at 2:59pm

Physics (help plz)
A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?
Sunday, September 16, 2007 at 2:58pm

math
A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?
Sunday, September 16, 2007 at 2:25pm

Physics (help plz)
A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?
Sunday, September 16, 2007 at 2:17pm

chemistry
-2.60- Hi here is a question I am having trouble with. I need help only on part c. ________________________________________​________________________________________​________________________________________​____________________________________ Each time you ...
Sunday, September 16, 2007 at 2:14pm

Physics
A body of mass 20kg is transferred from earth (grams=weight newton kg) to another planet where G=2 Newton kg, 1.Wat is the mass on earth? 2.wat is the wieght on earth? 3.wat is the mass on the other planet? 4.wat is the weight on the other planet?
Sunday, September 16, 2007 at 2:13pm

Physics
A helicopter is ascending vertically with a speed of 5.20 m/s. AT the height of 125m above the earth, a package is dropped from a window.How much time does it take for the package to reach the ground. ****Note: Please show the steps.
Saturday, September 15, 2007 at 9:51am

science (conversion)
At the time of this books printing the national debt is about $8 trillion. (a) If payments were made at the rate of $1000 per second, how many years would it take to pay off the debt, assuming no interest were charged? (b)A dollar bill is about 15.5cm long. If 8 trillion ...
Friday, September 14, 2007 at 11:31pm

biology
What parts of the solid earth, atmosphere and hydrophere are not included in the biosphere?
Friday, September 14, 2007 at 12:27am

social studies
what are the 5 layers of the earth and are they liquid or solid?
Thursday, September 13, 2007 at 9:04pm

social studies
What are some of the forces that change earth's surface
Thursday, September 13, 2007 at 8:42pm

Physics Homework
1. You push a heavy car by hand. The car, in turn, pushes back with an opposite but equal force on you. Doesn’t this mean the forces cancel one another, making acceleration impossible? Why or why not? -No, because of the system that is involved. The system would be you ...
Wednesday, September 12, 2007 at 4:26pm

Physics Homework
Could you please check my answers? Thanks! 1. You push a heavy car by hand. The car, in turn, pushes back with an opposite but equal force on you. Doesn’t this mean the forces cancel one another, making acceleration impossible? Why or why not? -No, because in order to ...
Tuesday, September 11, 2007 at 10:05pm

Physics
Please check my answers: Why does a brick weigh 1 kilogram. Explain. -Is it because the matter in the brick is the gravitational pull between the brick and the earth? When one water drop falls from a facet, and then a few minutes later another drop. How will the drop come out...
Sunday, September 9, 2007 at 11:04pm

Earth Science
I'm doing a crossword and cannot figure this last one out. The clue for it is: Application of scientific discoveries. It has 10 letters, the 5th letter is an N and the 10th letter is a Y.
Sunday, September 9, 2007 at 8:29pm

Chemistry
The average density of living matter on Earth's land areas is 0.10g/cm squared. What mass of living matter in kilograms would occupy an area of 0.125 ha? I think I can answer this if i knew what ha was. Any help would be appreciated.
Sunday, September 9, 2007 at 1:02pm

English/Reading
Hidden meaning? PPPP --------- earth Thanks!
Thursday, September 6, 2007 at 7:31pm

Physics
The acceleration of gravity on the moon is about 1.6 m/sec2. An experiment to test gravity compares the time it takes objects to reach a speed of 10 m/sec after being dropped from rest. How long does an object dropped on the moon have to fall compared to an object dropped on ...
Tuesday, September 4, 2007 at 10:30pm

Physics
A weather balloon is floating at a constant height above Earth when it releases a pack of instruments. If the pack hits the ground with a velocity of -68.5 m/s, how far does the pack fall? a = -9.80 m/s^2 Vf = -68.5 m/s d = ?
Tuesday, September 4, 2007 at 9:23pm

math
The basement of a new home will have the following dimensions 30 feet long 24 feet wide and 9 feet deep If the earth is hauled away in loads of 3 cubic yards each, how many loads must be hauled away?
Tuesday, September 4, 2007 at 8:01pm

Physics
I am not too sure how to solve this problem: Gravity on the surface of the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 10 kg object on the moon? This is how I did 1/6(10)(9.8)=16.3 N
Sunday, September 2, 2007 at 10:31pm

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