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July 31, 2015

Homework Help: Science: Earth

Recent Homework Questions About Earth

science
calculate the mass in kg of an object that weighs 1225 n on earth
Monday, May 19, 2008 by Corey

Biology: Evolution
Scientists suggest that two energy sources, __________ and __________, broke the bonds in the gases in Earth's primitive atmosphere, releasing atoms to form __________. Help! I forgot my book at school! Please!
Sunday, May 18, 2008 by MW

science
movement of earth around sun and movement of moon around earth
Saturday, May 17, 2008 by ali

physics
how do you compare mass and weight on the earth, moon, and outer space?
Wednesday, May 14, 2008 by cayla

earth
an area of high pressure is referred to as a anticyclone, and an area of low pressure is called a cyclone. is percipitation generally accosiated with a cyclone or anticyclone?
Monday, May 12, 2008 by taylor

Regents
Where is the site of the Regents countdown for Earth Science? It has the days, hours, minutes, etc. and I can't find it. Please help. Thank you.
Saturday, May 10, 2008 by Anonymous

science
when water falls as precipition it either runs off earth surface or sinks into the ground as____________________
Saturday, May 10, 2008 by tammy

english
I am just completely stuck and on the verge of giving up. My last day of school is today and if I dont hand in this essay I will fail no matter what. The essay is on the type of essay, voice and tone in the chapter toolbox of Stephen King's book, On Writing: A memoir of ...
Monday, May 5, 2008 by molly

a&p
If an astronaut returned to earth after a 180 day stay in a weightless space station he would have a decrease in bone mass? true or false?
Sunday, May 4, 2008 by sam

science
Most of Earth's rain and snow comes from where?
Wednesday, April 30, 2008 by Tiffany

Physics
Explain how redioactive decay has always warmed the Earth from the inside and how nuclear fusion has always warmed the Earth from the outside.
Friday, April 25, 2008 by Rob

Physics
The intensity of sunlight reaching the earth is 1360 W/m^2 Part A: Assuming all the sunlight is absorbed, what is the radiation-pressure force on the earth? Give your answer in newtons. Part B: Give your answer as a percentage of the sun's gravitational force on the earth...
Thursday, April 24, 2008 by Jill

Physics
I have to find the eccentricity of an elliptical orbit with one focus, earth's center, E. I know the formula to find eccentricity is sqrt(1-)(b^2/a^2), but I don't know where to use the radius or if I need it. Do I just need to use the eccentricity formula to find it? ...
Tuesday, April 22, 2008 by Thomas

Physics
Which one is a true statement? The magnetic field of the Earth: a)never changes b)continuously changes c) sometimes vanishes entirely d) is uniform Isn't it b) I know that a) and c) are wrong.
Monday, April 21, 2008 by Andrea

sci
why does the earth cool off at night much more quickly when the sky is clear than cloudy
Monday, April 21, 2008 by billystar

Physics - Grade 12
I've been doing extra questions for physics, but these four are still giving me trouble. Please help me solve them, including Free Body Diagrams if possible. 1. If a curve with a radius of 60m is properly banked for a car traveling at 60km/hr, what must the coefficient of ...
Monday, April 21, 2008 by Joe Seppe

bio
Can someone provide me the help to explain this statement: "An important step in the history of life on Earth was the evolution of eukaryotic cells from prokaryotes"
Sunday, April 20, 2008 by Helen

science
how is heliocentric(planets and Earth revolve around the sun) connected to science? math? the world? you? and y is it important?
Sunday, April 20, 2008 by anonymous

Physics 12
I've been doing alot of extra questions for physics lately, and these four are still giving me trouble. Please help me out and help me solve them, including Free Body Diagrams if possible. 1. If a curve with a radius of 60m is properly banked for a car travelling at 60km/...
Saturday, April 19, 2008 by Joe

science
why do we celebrate earth day? is it important to celebrate earth day?
Friday, April 18, 2008 by Dj

Physics
For the following, put T in the box if the statement is true, Fif it is false. Try to provide a very brief explanation of each answer. a) Like chargs attract; unlike charges repel. b) When polythene is rubbed with wool, positive charges move from the polythene to the wool. c) ...
Friday, April 18, 2008 by Baby

bio
Explain this statement "An important step in the history of life on Earth was the evolution of eukaryotic cells from prokaryotes"
Friday, April 18, 2008 by Jennifer

Physics "Space Travel"
Suppose you want to go to the immense red giant Betelgeuse, which is about 500 light years away. (A light year is the distance that light travels in one year.) You plan to travel at constant speed in a 1000 ig rocket ship. A: If the rocket ship's speed is 0.500 c, ...
Thursday, April 17, 2008 by Chelly

Physics
For the following, put T in the box if the statement is true, Fif it is false. Try to provide a very brief explanation of each answer. a) Like chargs attract; unlike charges repel. b) When polythene is rubbed with wool, positive charges move from the polythene to the wool. c) ...
Thursday, April 17, 2008 by Baby

Physics
I have to make two multiple-choice questions for this standard: Standard 4b: Students know how to identify transverse and longitudinal waves in mechanical media, such as springs and ropes, and on the earth (seismic waves). The first question I already made; it had to do with ...
Wednesday, April 16, 2008 by Emily

Nuclear physics
1)7Be decays with a half-life of about 53 d. It is produced in the upper atmosphere, and filters down onto the Earth's surface. If a plant leaf is detected to have 300 decays/s of 7Be, how many days do we have to wait for the decay rate to drop to 13.6/s? 2) What is the ...
Wednesday, April 16, 2008 by Sandhya

physics
1)7Be decays with a half-life of about 53 d. It is produced in the upper atmosphere, and filters down onto the Earth's surface. If a plant leaf is detected to have 300 decays/s of 7Be, how many days do we have to wait for the decay rate to drop to 13.6/s? Do not enter ...
Tuesday, April 15, 2008 by Sandhya

physics
A law enforcement officer in an intergalactic "police car" turns on a red flashing light and sees it generate a flash every 1.5 s. A person on earth measures that the time between flashes is 2.9 s. How fast is the "police car" moving relative to the earth?
Monday, April 14, 2008 by rick

Physics
I have to make up my own standardized questions for a project, and I wanted to make sure I did my math right. Can someone please check it? Thanks!! If your mass was 60 kg, the earth’s mass was 6×10^24 kg, the radius of the earth was 6.4×10^6 meters, and the ...
Sunday, April 13, 2008 by Emily

Physics
The north pole of a compass is attracted to the north magnetic pole of the earth, yet like poles repel. Can you resolve this apparent dilemma?
Thursday, April 10, 2008 by Angelina

science
Can someone help me with this question please? explain how earth naturally recycles carbon dioxide.
Thursday, April 10, 2008 by Dj

Science
Which waves can be used to map the interior of earth?
Thursday, April 10, 2008 by Jennifer

Science
The waves that are used have to go deep into the earth. Can Love and Raleigh waves be used for the purpose of mapping the interior of earth? Why or why not?
Thursday, April 10, 2008 by Jennifer

Grammar/English
May I have someone proofread this? It is for a business presentation I have for a class scheduled today at noon. Mohegan Sun may have entered a maturity stage given that there are strong challenges to marketing management. However, Mohegan Sun cycles back into the growth stage...
Wednesday, April 9, 2008 by Manny to ANYONE

Physics
You plan to build a large, cheap cyclotron using the Earth's magnetic fields(1x10^-4 T) and orbiting just above the Earth's atmosphere (radius 5.7 x10 ^6 m) What energy, in volts, should protons be given to just circle the earth? q= 1.6 x10^-19 C, m= 1.67x10^-27 1 ...
Tuesday, April 8, 2008 by Sandhya

physics
1) You plan to build a large, cheap cyclotron using the Earth's magnetic fields(1x10^-4 T) and orbiting just above the Earth's atmosphere (radius 5.7 x10 ^6 m) What energy, in volts, should protons be given to just circle the earth? q= 1.6 x10^-19 C, m= 1.67x10^-27 2) ...
Tuesday, April 8, 2008 by Sandhya

english-al gore
need answer to these questions: 2. Why is the picture of Earth taken on Dec. 11, 1972 the most commonly published photograph in history? 4. Why did they choose the middle of the Pacific Ocean for these measurements? 5. What year did Al Gore go to Kyoto, Japan? Why is Kyoto ...
Monday, April 7, 2008 by bill

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 by Charlie

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 by Jon

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 by Jon

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 by sake

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 by Dj

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 by Anonymous

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 by Monica

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 by emma

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 by J

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 by gabriella

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 by Chris Adison

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 by Jason

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 by Haya

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 by Dawn

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 by Danielle

Science
Find your mass if a scale on Earth reads 650N when you stand on it.
Monday, March 24, 2008 by Jennifer

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 by Jennifer

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 by Tony Poon

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 by Anonymous

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 by Me

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 by Anonymous

Science
When did our Earth form to a planet? =]
Thursday, March 20, 2008 by Katie

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 by Anonymous

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 by Steve

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 by Steve

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 by Anonymous

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 by claudia

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 by Mary

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 by Jeanette

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 by Claire

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 by kristen

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 by James

earth science
The area where precipitation and storms occur is a ? syestem.
Thursday, March 13, 2008 by kayshell93

earth
strontium working with water is it physical or chemical
Thursday, March 13, 2008 by polly

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 by Anonymous

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

Science
Why is the earth's temperature different in different places?
Thursday, March 13, 2008 by Beth

Science
Why does Earth exert a stronger gravitational force than the Moon?
Tuesday, March 11, 2008 by Jennifer

earth science
" A condition of gravitational and bouyant equilibrim between earth's litosphere and asthenosphere" ... is what?
Monday, March 10, 2008 by Stephen

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 by Rachel

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 by Jim

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 by Gamel

earth
What happens when a cold surface water current collides with a warm surface water current?
Sunday, March 9, 2008 by Kelsey

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 by Dani

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 by Dani

earth science
how is the andean type subduction zone different from the aleutian type subduction zone? are there pictures?
Sunday, March 9, 2008 by Dani

earth science
what mountain chain has formed at a divergent plate boundary?
Sunday, March 9, 2008 by Dani

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 by raks

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 by Jesus

Science
How would day and night be different if Earth's axis were not tilted?
Friday, March 7, 2008 by Marcus

earth
If Earth took 500 days to orbit the sun instead of 365, how would the seasons be different?
Friday, March 7, 2008 by Jennifer

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 by jenish

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 by jenish

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 by johnny

earth
how does convection work
Wednesday, March 5, 2008 by brandon

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 by Marty

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 by shelby

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 by shelby

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 by sarah

space
how many planets are smaller than earth
Tuesday, March 4, 2008 by michael

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 by Zach

Earth science
the youngest part of ocean floor is found
Sunday, March 2, 2008 by Anonymous

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 by T

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Homework Help: Science

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