Wednesday
May 27, 2015

Homework Help: Science: Earth

Recent Homework Questions About Earth

Physics
An object of mass 3.5x1023kg circles the earth and is attracted to it with a force whose magnitude is given be GMeM/r^2. If the period of rotation is 22 days, what is the distance from the earth to the object? Here G=6.67x10-11 Nm2/kg2, Me=6x1024 kg.
Saturday, April 5, 2008 at 2:34pm

physics repost
If Earth shrinks in size such that its shape and mass remain the same, but the radius decreases to 0.21 times its original value, find the acceleration due to gravity on its surface. (6378.1/0.21)(9.80) = 2.97 m/s^2
Thursday, April 3, 2008 at 9:33am

physics
If Earth shrinks in size such that its shape and mass remain the same, but the radius decreases to 0.21 times its original value, find the acceleration due to gravity on its surface. (6378.1/0.21)(9.80) = 2.97 m/s^2
Wednesday, April 2, 2008 at 11:42pm

science
the free-fall acceleration on the surface of the moon is appromimately 1/6 of the free-fall acceleration on the surface of earth. compare the period of a pendumlum on earth with that of an identical pendulum set in motion on the moon
Wednesday, April 2, 2008 at 10:10pm

science
If Earth is 149.6 million Kilometers from the sun, or 93 million miles away. suppose there was an imaginary road from earth to the sun. If you were in a car traveling 100 km an hour, it would take you 1,490,000 hours or just 170 years to reach the sun. If it took 170 years to ...
Wednesday, April 2, 2008 at 4:43pm

physics
consider an electron near the equator. in which direction does it tend to deflect by the magnetic field of the earth if its velocity is directed a. downward b.northward c.westward d.woutheastward
Wednesday, April 2, 2008 at 2:34am

Science
An airplane traveling at 9.50 102 km/h passes over a region where Earth's magnetic field is 4.4 10-5 T and is nearly vertical. What voltage is induced between the plane's wing tips, which are 75 m apart? What's the formula for this question?
Tuesday, April 1, 2008 at 4:43pm

solar systems
if the earth rotated every 16 hours how would this affect solar eclipses, the phases of the moon and our tides
Tuesday, April 1, 2008 at 8:00am

Physics
When a solar flare erupts on the surface of the sun, how many minutes after it occurs does its light show up in an astronomer's telescope on earth? I am totally confused..help!
Monday, March 31, 2008 at 6:03pm

global warming
hi im doing a debate tomorrow on global warming, i am arguing that it DOES exsit. the opposing side who dont believe in global warming want to say that increases in temperatures dont cause sea levels to rise, instead the tectonic plates of the earth cause changes in sea level...
Sunday, March 30, 2008 at 1:00pm

physics induced voltage
A Boeing 747 jet with a wingspan of 60.0 m is flying horizontally at a speed of 287 m/s over Phoenix, Arizona, at a location where the Earth's magnetic field is 50.2 µT at 58.0° below the horizontal. What voltage is generated between the wingtips?
Saturday, March 29, 2008 at 8:44pm

chemistry
why does a weather balloon get bigger as as it rises from Earth's surface? I dont understand how this relates to "kinetic molecular theory"
Saturday, March 29, 2008 at 5:48pm

Science-Please Help!
name two devices that we use on earth, which use the same principles as space capsules. Explain for each one.
Saturday, March 29, 2008 at 5:47am

Science/Language
Alright.... i asked this question last night, but i'm going to be a bit more clear this time. My Language teacher is doing a big unit on "stuff",(What happens to all of the stuff on earth). My job in this project is to find the extraction of a crayon. So the ...
Tuesday, March 25, 2008 at 9:50am

Math
I have two questions that I need help with. 1. Angle of Depression: A Global Positioning System satellite orbits 12,500 miles above Earth's surface. Find the angle of depression from the satellite to the horizon. Assume the radius of Earth is 4000 miles. 2. Geometry: A ...
Tuesday, March 25, 2008 at 12:25am

Science
Find your mass if a scale on Earth reads 650N when you stand on it.
Monday, March 24, 2008 at 7:06pm

Science
Describe the action and reaction force pairs involve when an object falls toward Earth. Ignore the effects of air resistance.
Monday, March 24, 2008 at 10:59am

Physics - Satellites
Why must the centre of the satellite orbit coincide with the centre of the Earth? I'm such a science noob, please help >_<
Monday, March 24, 2008 at 1:51am

Physics
Show that the total mechanical energy of a satellite (mass m) orbiting a distance r from the center of the Earth (mass M-e)is: -(1/2)*(G m M-e)/(r if U = 0 at r = infinity. Show that although friction causes the value of E (mechanical energy) to decrease slowly, the kinetic ...
Friday, March 21, 2008 at 1:03pm

Personal Finance Concepts
I have a project with a group portion and an individual portion. My question is how on earth do I start this, determine the figures in question, etc?!?! Here are the details of the project: Your younger brother, Tom, just received information from his company on his benefits. ...
Thursday, March 20, 2008 at 2:24pm

Physics
Show that the total mechanical energy of a satellite (mass m) orbiting a distance r from the center of the Earth (mass M-e)is: -(1/2)*(G m M-e)/(r if U = 0 at r = infinity. Show that although friction causes the value of E to decrease slowly, the kinetic energy must actually ...
Thursday, March 20, 2008 at 1:22pm

Science
When did our Earth form to a planet? =]
Thursday, March 20, 2008 at 12:31pm

english
Can some read the paragraph below and check my grammars are correct. In the article Grim Climate Predictions Not Exaggerated, Analysis Says, John Roach bases on the study of The Science, John Roach reports that in the recent years the concentration of green house gas has ...
Thursday, March 20, 2008 at 1:09am

Physics
Take into account the Earth's rotational speed (1 rev/day) and determine the necessary speed, with respect to the Earth, for a rocket to escape if fired from the Earth at the equator in a direction a) eastward; b) westward; c) vertically upward. The answers are 1.07 x10^4 ...
Wednesday, March 19, 2008 at 4:32pm

Physics
Take into account the Earth's rotational speed (1 rev/day) and determine the necessary speed, with respect to the Earth, for a rocket to escape if fired from the Earth at the equator in a direction a) eastward; b) westward; c) vertically upward. The answers are 1.07 x10^4 ...
Wednesday, March 19, 2008 at 4:32pm

grammar
Can some read the paragraph below and check my grammars are correct. The climate is changing. The Earth is warming up, and there is now overwhelming scientific consensus that it is happening, and human induced. Many are agreed that climate change may be one of the greatest ...
Wednesday, March 19, 2008 at 1:08pm

earth
if the tilt of the earth's axis was increased beyond 23.5 degrees, will it cause seasonal variation in the equator to decrease? if the earth's axis becomes perpendicular to the orbital plane between the earth and the sun will it increase the length of night, increase ...
Tuesday, March 18, 2008 at 11:14pm

Elementary lesson
I want my readers to understand that water has been around from the beginning of time. I want them to understand that the earth is constantly recycling the water and that the waters that dinasours drank millions of years ago, is the same one that we are drinking now. This is ...
Tuesday, March 18, 2008 at 11:05pm

math
An object that weighs 10 ib on earthwould weigh only 4 ib on mars. If you weigh 95il on earth, how much would you weigh on mars?
Tuesday, March 18, 2008 at 7:36pm

Physics
Given that the Earth's radius is 6.37x10^6 m and taking the earth's gravitational field at its surface to be 9.81N/kg, find the gravitational potential at the Earth's surface.
Tuesday, March 18, 2008 at 4:30am

physics
In a certain binary star system, each star has the same mass as our sun, and they revolve about their center of mass. The distance between them is teh same as the distance between the EArth and sun. Wha tis their period of revolution in years?
Sunday, March 16, 2008 at 11:44pm

physics
Here on earth and also on the moon two identical heavy crates (300kg) sit at rest on 2 identical level platforms with coefficients of static friction equal to (0.90). If one end of both platforms is slowly raised at the same time in both locations, will the crates eventually ...
Sunday, March 16, 2008 at 1:43am

earth science
The area where precipitation and storms occur is a ? syestem.
Thursday, March 13, 2008 at 6:50pm

earth
strontium working with water is it physical or chemical
Thursday, March 13, 2008 at 6:22pm

earth science
When air is saturated, the relative humidity is 100%, the air is holding the max. amt. of moisture, and condensation can occur. True?
Thursday, March 13, 2008 at 6:18pm

Earth Science
Clouds will from when condensation nuclei are present and: air reaches its dewpoint. is that all true?
Thursday, March 13, 2008 at 6:04pm

Science
Why is the earth's temperature different in different places?
Thursday, March 13, 2008 at 5:28pm

Science
Why does Earth exert a stronger gravitational force than the Moon?
Tuesday, March 11, 2008 at 7:25pm

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

  1. Pages:
  2. <<Prev
  3. 49
  4. 50
  5. 51
  6. 52
  7. 53
  8. 54
  9. 55
  10. 56
  11. 57
  12. 58
  13. 59
  14. 60
  15. 61
  16. 62
  17. 63
  18. Next>>

Homework Help: Science

Members