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April 27, 2015

Homework Help: Science: Earth

Recent Homework Questions About Earth

earth science
" A condition of gravitational and bouyant equilibrim between earth's litosphere and asthenosphere" ... is what?
Monday, March 10, 2008 at 7:51pm

Physical Science
The heat of volcanoes and hot springs comes from trace amounts of radioactive minerals found in the Earth's interior. Why isn't the same rock at the Earth's surface warm?
Monday, March 10, 2008 at 6:10pm

Physics
I have to find the Current created by earth as it circles the sun.through the formula I=(Q/delta t). Hint:It says think of the cross section of the earths orbit.How often does a charge pass through it.
Monday, March 10, 2008 at 12:16pm

Math
Suppose that an object is 100 lbs when it is at sea level. find the value of c that makes the equation true. (Sea level is 3963 miles from the center of the earth.) Use the value of c you found in the previous question to determin how much the object would weight in the Death ...
Monday, March 10, 2008 at 2:12am

earth
What happens when a cold surface water current collides with a warm surface water current?
Sunday, March 9, 2008 at 5:09pm

earth science!!!
what are the main differences between a chain formed at a divergent plate boudary and those developed at convergent plate boundaries? explain the differences
Sunday, March 9, 2008 at 4:20pm

earth science
what are the main differences between a chain formed at a divergent plate boudary and those developed at convergent plate boundaries? explain the differences
Sunday, March 9, 2008 at 1:52pm

earth science
how is the andean type subduction zone different from the aleutian type subduction zone? are there pictures?
Sunday, March 9, 2008 at 12:18pm

earth science
what mountain chain has formed at a divergent plate boundary?
Sunday, March 9, 2008 at 12:04pm

physics
A high-voltage line of length 175 m is carrying a current of 105 A at a point on the earth where its magnetic field is 5 * 10^(-5) T and points North,34 degree from the vertical axis. A) what is the magnitude and direction of the force on the wire if the current is flowing ...
Saturday, March 8, 2008 at 2:57am

Physics
What are the restrictions on the orbit of a communications satellite if it is to appear motionless in the sky as viewed from any location on earth?
Friday, March 7, 2008 at 7:43pm

Science
How would day and night be different if Earth's axis were not tilted?
Friday, March 7, 2008 at 6:23pm

earth
If Earth took 500 days to orbit the sun instead of 365, how would the seasons be different?
Friday, March 7, 2008 at 6:22pm

Physics
A high-voltage line of length 175 m is carrying a current of 105 A at a point on the earth where its magnetic field is 5 * 10^(-5) T and points North,34 degree from the vertical axis. A) what is the magnitude and direction of the force on the wire if the current is flowing ...
Thursday, March 6, 2008 at 8:57pm

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

Chemistry
I have to make a game based on the periodic table Here are the standards we could put in the game: Students know how to relate the position of an element in the periodic table for it's atomic number and mass Students know how to use the periodic table to ID, metals, semi-...
Thursday, March 6, 2008 at 7:25pm

earth
how does convection work
Wednesday, March 5, 2008 at 6:11pm

Physics
If you weighed 112 N on the Moon where g=1.6N/kg, how much would you weigh on Earth?
Wednesday, March 5, 2008 at 1:53pm

physics
At what speed should a space probe be fired from the earth if it is required to still be traveling at a speed of 3.48 km/s, even after coasting to an exceedingly great distance from the planet (a distance that is essentially infinite)?
Tuesday, March 4, 2008 at 11:09pm

physics
A 7710-kg rocket is set for vertical firing from the earth's surface. If the exhaust speed is 1350 m/s, how much gas must be ejected each second in order for the thrust to be equal to the weight of the rocket? How much gas must be ejected each second to give the rocket an ...
Tuesday, March 4, 2008 at 12:00pm

english- URGENT
could somebody please look over this outline I made saying how Adrienne rich would view the women in Othello and how they are victims of patriarchy? ESPECIALLY THE THESIS AND HOW TO IMPROVE IT Adrienne Rich defines patriarchy on pg. 57, Of Woman Born, as “Patriarchy is ...
Tuesday, March 4, 2008 at 9:13am

space
how many planets are smaller than earth
Tuesday, March 4, 2008 at 2:08am

Physics
The earth rotates once per day about an axis passing through the north and south poles, an axis that is perpendicular to the plane of the equator. Assuming the earth is a sphere with a radius of 6.38 106 m, determine the speed and centripetal acceleration of a person situated...
Monday, March 3, 2008 at 1:43pm

Earth science
the youngest part of ocean floor is found
Sunday, March 2, 2008 at 10:01pm

Chemistry
I have a few questions, if anyone can help me at all it would be amazing. i need this done by TOMORROW (03/03/2008) 1. Cyanogen has been observed in the atmopshere of Titan, Saturn's largest Moon, and in the gases of the interstellular nebulas. On Earth, it is used as a ...
Sunday, March 2, 2008 at 6:35pm

Chem
I have a few questions, if anyone can help me at all it would be amazing. i need this done by TOMORROW (03/03/2008) 1. Cyanogen has been observed in the atmopshere of Titan, Saturn's largest Moon, and in the gases of the interstellular nebulas. On Earth, it is used as a ...
Sunday, March 2, 2008 at 6:20pm

algebra
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 the weight of an object on earth also varies ...
Saturday, March 1, 2008 at 10:34am

math
THE DISTANCE FROM EARTH TO MOON IS ABOUT 22^4 MILES . THE DISTANCE FROM EARTH TO NEPTUNE IS ABOUT 22^7 MILES . WHICH DISTANCE IS GREATER ? ABOUT HOW MANY TIMES GREAT ?
Saturday, March 1, 2008 at 3:38am

english
I'm trying to study satire. I found this poem online Now if you take an orange And hold it in your hand, It isn't really there at all - Or so I understand. A sensationalist will prove to you That though you know it's there, It's only just sensations Of which ...
Wednesday, February 27, 2008 at 1:12am

earth
Search Results for "How many years pass befor light from Alpha Centeuri reaches earth?"
Tuesday, February 26, 2008 at 8:45pm

english
OF MAN’S first disobedience, and the fruit Of that forbidden tree whose mortal taste Brought death into the World, and all our woe, With loss of Eden, till one greater Man Restore us, and regain the blissful Seat, 5 Sing, Heavenly Muse, that, on the secret top Of Oreb, or...
Tuesday, February 26, 2008 at 3:28am

Chemistry please check
1. Which of the following would occur as saturated hydrocarbons? alkanes alkenes alkynes cycloalkynes ans: alkanes 2. There are millions of organic compounds but only thousands of inorganic compounds because atoms of elements other than carbon never combine with themselves ...
Monday, February 25, 2008 at 8:50pm

science
how many electrons are in the outer energy level of the atoms of alkaline-earth metals?
Monday, February 25, 2008 at 4:06pm

science
the alkaline-earth metals react similarly because they all have the same number of electrons in their outer energy level. Which group contains the alkaline-earth meatals?
Monday, February 25, 2008 at 4:05pm

Calc
A rocket is launched with an initial velocity of zero, and with acceleration in feet per second per second defined by: --------( 20e^(-t/2), for 0 <= t <= 10 seconds) a(t) = ( --------( -16, for t > 10 seconds) a) At what time does the rocket begin to descend? b) How ...
Sunday, February 24, 2008 at 4:55pm

Physics
What astronomical event would be seen by observers on the Moon at the time the Earth experiences a lunar eclipse? At the time the Earth experiences a solar eclipse?
Friday, February 22, 2008 at 8:26pm

Math Application
A space camera circles the Earth at a height of h miles above the surface. Suppose that d distance, IN MILES, on the surface of the Earth can be seen from the camera. (a) Find an equation that relates d and h. (b) If d is to be 3500 miles, how high must the camera orbit above ...
Friday, February 22, 2008 at 6:32pm

Mathematics
A space camera circles the Earth at a height of h miles above the surface. Suppose that d distance, IN MILES, on the surface of the Earth can be seen from the camera. (a) Find an equation that relates the central angle theta to the height h. (b) Find an equation that relates ...
Friday, February 22, 2008 at 6:31pm

Calc
A rocket is launched with an initial velocity of zero, and with acceleration in feet per second per second defined by: --------( 20e^(-t/2), for 0 <= t <= 10 seconds) a(t) = ( --------( -16, for t > 10 seconds) a) At what time does the rocket begin to descend? b) How ...
Friday, February 22, 2008 at 4:06pm

earth
How does time affect crystals?
Thursday, February 21, 2008 at 5:55pm

EARTH SCINCE
HOW WERE THE LARGE CANYONS ON MARS THOUGHT TO HAVE BEEN FORMED?
Thursday, February 21, 2008 at 12:01am

EARTH SCINCE
THE JOVI QUANTITIESGEAN PLANETS CONTAINS LARGE QUANTITIES OF ICE BECAUSE IT WAS?
Wednesday, February 20, 2008 at 11:51pm

physics
gravity on the surface of the moon is only 1/6 as strong as the gravity on earth. What is the weight of a 39kg on the earth?
Tuesday, February 19, 2008 at 2:05pm

Physics
How long would it take for a beam of light to travel around the earth in an ideal fiber-optic cable?
Monday, February 18, 2008 at 9:12pm

Physical science
When you drop a 0.36 kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s^2 toward the earth's surface. According to Newton's third law, the apple must exert an equal but opposite force on Earth. If the mass of the earth 5.98x10^24 kg, what is the ...
Sunday, February 17, 2008 at 6:41pm

science
Scientists debate about the use of fossils as a tool to determine records of various events, such as the vanishing of the dinosaurs or the origin of our ancestors.discuss the role of fossils in helping scientists develop accurate records of the geologic history of the Earth.
Thursday, February 14, 2008 at 8:34pm

Physics
When an automobile moves over a wide, closed loop of wire embedded in a road surface, is the magnetic field of the Earth within the loop altered? Is a pulse of current produced? Can you cite a practical application for this at a traffic intersection?
Wednesday, February 13, 2008 at 11:10pm

Math
There are 61 known moons. Mercury and Venus do not have moons, but each of the 7 other planets has at least 1. How do I find the % of total moons for each planet? Earth - 1 Mars - 2 Jupiter- 16 Saturn - 18 Uranus - 15 Neptune - 8 Pluto - 1 Thanks for your help.
Wednesday, February 13, 2008 at 6:32pm

physics
The electron gun in a color TV accelerates the electrons through about 25,000 Volts. Estimate the acceleration of such an electron due to the magnetic field of the earth. Hint: In Atlanta, the Earth's magnetic field has a magnitude of about 5.2 X 10-5 T.
Monday, February 11, 2008 at 11:55pm

Physics
A person with a mass of 85kg. How much in newtons do they weigh on the earth and the moon?
Monday, February 11, 2008 at 6:40pm

Physics
The moon orbits 3.84 x 10^8m form the center of the earth. How fast does the moon travel in meters per second?
Monday, February 11, 2008 at 6:39pm

Physics
Find the gravitational force between the sun and the earth in newtons?
Monday, February 11, 2008 at 6:34pm

physics
An electric power line carries a current of 1600 A in a location where the earth's magnetic field is 4.0*10-5 T. The line makes an angle of 75° with respect to the field. Determine the magnitude of the magnetic force on a 130 m length of line.
Sunday, February 10, 2008 at 8:56pm

physics
The world record for the discus throw is 74.08m , set by Jürgen Schult in 1986.If he had been competing, not on earth, but on Mars, where the acceleration due to gravity is 0.379 what it is on earth, and if he had thrown the discus in exactly the same way as on earth, ...
Sunday, February 10, 2008 at 8:39am

physics
The world record for the discus throw is 74.08m , set by Jürgen Schult in 1986.If he had been competing, not on earth, but on Mars, where the acceleration due to gravity is 0.379 what it is on earth, and if he had thrown the discus in exactly the same way as on earth, ...
Saturday, February 9, 2008 at 6:09pm

Physics
A "dip needle" is a small magnet mounted on a horizontal axis so that it can swivel up or down. Where on Earth will a dip needle point most nearly verically? Where will it point most nearly horizontally?
Saturday, February 9, 2008 at 2:41am

Physics
If you fell into a hole in the Earth how long would it take to reach the center of the earth if your velocity remained constant at 100mph?
Friday, February 8, 2008 at 9:40pm

Physics
The average radius of the earth is 6.38*10^6m. Is the diameter just twice that or 12.8*10^6m. The circumference is 6.28(6.38*10^6)=40.1*10^6m
Friday, February 8, 2008 at 5:57pm

Physics
If you fell into a hole in the Earth how long would it take to reach the center of the earth if your velocity remained constant at 100mph?
Friday, February 8, 2008 at 5:51pm

Physics
If you were to jump from an airplane at an altitude of 15000 ft. and fall toward the Earth at 100 mph how long would it take to reach the surface?
Friday, February 8, 2008 at 5:49pm

Physics
A satellite is in orbit 2500km above the surface of Earth. What is the velocity of the satellite in m/s?
Friday, February 8, 2008 at 5:47pm

science
whats the term? 1)the turning of air masses from their original paths because of earth's rotation 2)high altitude winds that occur in places where trade winds and polar easterlies meet prevailing westerlies
Thursday, February 7, 2008 at 11:30pm

earth science
where does the energy that drives the rock cycle come from
Thursday, February 7, 2008 at 5:10pm

Earth Science
What is the primary cause of surface currents?
Thursday, February 7, 2008 at 1:18pm

SCIENCE
ARE ANY OF THE 9 PLANETS WITHIN OUR SOLAR SYSTEM A LIGHT YEAR OR MORE AWAY FROM EARTH?
Thursday, February 7, 2008 at 11:26am

SCIENCE
ON A PLANET IN THE YEAR 2000 YOU ARE OBSERVING AMERICA'S BICENTENNIAL CELEBRATION IN BOSTON, MASSACHUETTS. HOW MANY LIGHT YEARS AWAY ARE YOU FROM EARTH. HOW FAR ARE YOU IN KILOMETERS
Thursday, February 7, 2008 at 11:25am

Science
A CHILD IS BORN ON EARTH IN 2000. yOU ARE 94.6 TRILLION KILOMETERS AWAY FROM EARTH AND YOU SEE THE CHILD'S 3RD BIRTHDAY. HOW OLD IS THE CHILD AT THE TIME OF THE CHILD'S 3RD BIRTHDAY?
Thursday, February 7, 2008 at 11:24am

physics
the north pole of a compass is attracted to the north magnetic pole of the earth, yet like poles reple. can you resolve this apparent dilemma?
Tuesday, February 5, 2008 at 3:14am

physics
A dip needle is a small magnet mounted on ahorizontal axis so that it can swivel up or down like a compass turned on it's side) where on earth will a dip needle point most nearly vertically? where will it point most nearly horizontally?
Tuesday, February 5, 2008 at 3:06am

Physics
In lightning storms, the potential difference between the earth and the bottom of the thunderclouds can be as high as 35000000 V.The bottoms of the thunderclouds are typically 1500 m above the earth, and can have an area of 110 km^2. Modelling the earth-cloud system as a huge ...
Monday, February 4, 2008 at 9:15pm

Chemistry
People have proposed towing icebergs to arid parts of the earth as a way to deliver freshwater. Explain why icebergs do not contain salts although they are formed by the freezing of ocean water (i.e saltwater)
Monday, February 4, 2008 at 7:02pm

earth
When burning coalin a stove, which kind of energy transformation is taking place?
Monday, February 4, 2008 at 12:40pm

Geometry
how do you make a sketch of the earth, moon, and sun during a solar eclipse so that your sketch contains similar triangles?
Sunday, February 3, 2008 at 11:53pm

algebra2
Suppose it takes 3 days for a space vehicle to travel from Earth to the moon. About how long would it take for the same vehicle traveling at the same speed to Jupiter? Moon - 240,000 mi Jupiter - 391,000,000. The space vehicle would take how many days to reach Jupiter?
Saturday, February 2, 2008 at 4:15pm

Algebra
Thank you bobpursley. In question 2, if sea level is 3963 miles from the center of teh earth can I change the equation to figure out the weight of a 100 pound weight at lea level by doing something like this? 100=sqrt C/3963^2 ?
Friday, February 1, 2008 at 12:27pm

Physics
Each of the following statements has 1, 2, or 3 conceptual flaws. Explain what is wrong with each sentence (I just need help finding a website for this) 1. A rocket moves through space because the exhaust from the rocket's engine pushes against the atmosphere. 2. If an ...
Friday, February 1, 2008 at 12:04pm

Algebra
I was given an answer to a question but what I really need are the steps to get there as I have other questions I need to answer the same way. Solve the equation w=Cr^-2 for r I was given r=C/w This equation is meant to figure out the weight of an object where C is a constant ...
Friday, February 1, 2008 at 12:01pm

science
The thermal energy of volcanoes and natural hot springs comes from trace amounts of radioactive minerals in common rock in the Earth's interior. Why isn't the same kind of rock at the Earth's surface warm to the touch?
Wednesday, January 30, 2008 at 7:57pm

earth
whats limestone used for?
Tuesday, January 29, 2008 at 8:04pm

Response to DWRLS
I am still on this weight and elevation question. w=Cr^2 for r= r= quare root c/w Suppose that an object is 100 pounds at sea level. find the vlaue of C tat makes sense. Sea level is 3963 miles from the center of the earth. Wouldn't this be 100=C/(3963)^2 C=(3963)^2x100?
Tuesday, January 29, 2008 at 5:36pm

Algebra
w=Cr^-2 Suppose that an object is 100 pounds when it is at sea level. Find the value of C that makes the equation true. (Sea level is 3,963 miles from the center of the earth.)
Monday, January 28, 2008 at 6:40pm

Algebra
Solve the equation w=Cr^-2 The weight of an object follows this equation. Where C is a constant, and r is the distance that the object is from the center of the earth. There are too many variables for me to know where to begin. Can someone get me started?
Monday, January 28, 2008 at 5:10pm

earth
The short term condition in the troposphere are called?
Sunday, January 27, 2008 at 5:48pm

Science
What is a good science project to do? I am in 8th grade and am studying earth science. I need to present the project in front of class. Im really nervouse.
Sunday, January 27, 2008 at 3:18pm

biology: the study of life
2. what is meant by the statement "living things do not exist in isolation"? TRUE/FALSE 3.people study biology only if they are planning to become biologists. 4. by studying biology you can better appreciate the great diversity of species on earth and the way each ...
Sunday, January 27, 2008 at 2:56pm

science equations
what is the acceleration of a 8.4 kg mass if a force of 64.8 n is used to move it toward earth?f=mxa
Thursday, January 24, 2008 at 9:36pm

Earth Science
Which one of the following landforms would be created by outwash? 1) Moraines 2) Eskers 3) Drumlins 4) Erractics I have read all I can, but can not get this one. I am sure it is not #4 - Erractics.
Tuesday, January 22, 2008 at 11:04pm

physics
Suppose you had two small boxes, each containing 1.0 g of protons. (a) If one were placed on the moon by an astronaut and the other were left on the earth, and if they were connected by a very light (and very long!) string, what would be the tension in the string? Express your...
Monday, January 21, 2008 at 12:46pm

College Physics
During an electrical storm, clouds can build up very large amounts of charge, and this charge can induce charges on the earth's surface. Sketch the distribution of charges at the earth's surface in the vicinity of a cloud if the cloud is positively charged and the ...
Monday, January 21, 2008 at 11:36am

College Physics
A positively charged rubber rod is moved close to a neutral copper ball that is resting on a nonconducting sheet of plastic. a) Sketch the distribution of the charges on the ball. b) With the rod still close to the ball, a metal wire is briefly connected from the ball to the ...
Monday, January 21, 2008 at 11:25am

physics
The radius of the Earth is approximately 6000 km. The acceleration of an astronaut in a perfectly circular orbit 300 km above the Earth would be most nearly. For this question I simply guessed. I knew "a" was 9.8 on the surface, and my answers were 0, 0.05, 5, 9, and...
Sunday, January 20, 2008 at 10:14pm

physics
How close must two electrons be if the electric force between them is equal to the weight of either at the earth's surface?
Sunday, January 20, 2008 at 3:49am

physics
Two artificial satellites, 1 and 2, orbit the Earth in circular orbits having radii R1 and R2. If R2=2R1, the accelerations a2 and a1 of the satellites are related how?
Saturday, January 19, 2008 at 10:49pm

physics
A newly-discovered plant, "Cosmo", has a mass that is 4 times the mass of the Earth. The radius of the Earth is Re. The gravitational field strength at the surface of Cosmo is equal to that at the surface of the Earth if the radius of Cosmo is equal to... I guess I ...
Saturday, January 19, 2008 at 10:35pm

science
Please help me with these questions I have looked all threw my book but i cant find them. 7. Why are we not sure about the interior of the earth? Do we know for sure why? 12. Some volcanoes are more explosive than others? What makes this diffrence in explosivity occur? 14.What...
Saturday, January 19, 2008 at 6:33pm

physics
is this right? a 50kg barbell can be lifted by usinga force of 180 N. what is the force of gravity on this planet? if the same barbell is lifted on earth, what minimal force is needed? -i got 3.6 for gravity of the unnamed planet; and 49 N for the minimal force to be lifted on...
Thursday, January 17, 2008 at 11:16pm

Calc
Find the velocity of a satellite orbiting above the equator of the earth in geosynchronous orbit (Period=24 hours) in km/hr. The earth's mass M=5.974x10^(24)kg and radius R=6,731 km. G=6.673x10^(-11) m^3/(kg*s^2) Use v=(G*M/R)^(1/2) I plugged everything in and changed the ...
Thursday, January 17, 2008 at 10:54pm

math/physics
Help! I have no idea how to do this. The earth's orbit is nearly circular with a radius R=93x10^6 miles (the eccentricity is e=.017). Find the rate at which the earth's radial vector sweeps out area in units of ft^2/s. What is the magnitude of the vector J=rxr` for the...
Thursday, January 17, 2008 at 10:43pm

Earth Science
Why is a minimum of three seismic stations needed to find the epicenter of an earthquake?
Thursday, January 17, 2008 at 9:13pm

Earth Science
Why is a minimum of three seismic stations needed to find the epicenter of an earthquake?
Thursday, January 17, 2008 at 1:57pm

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Homework Help: Science

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