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July 28, 2016

Homework Help: Science: Earth

Recent Homework Questions About Earth

Grade 12 Chemistry
How does the rate of corrosion of iron on the moon compare to that on earth? I need enough info to write a whole paragraph on it...plz help
Tuesday, October 6, 2009 by plato

Physics
Two satellites are in circular orbits around the earth. The orbit for satellite A is at a height of 360 km above the earth's surface, while that for satellite B is at a height of 720 km. Find the orbital speed for each satellite.
Tuesday, October 6, 2009 by Sanjna

Physics
If a 20 kg object fell to the surgace of the Earth from a height of 30m, what would its final velocity be? (work from the energy standpoint)
Tuesday, October 6, 2009 by Kayla

Physics
If a 20 kg object fell to the surgace of the Earth froma height of 30 m, what would its final velocity be? (work problem from the stanpoint of linear motion)
Tuesday, October 6, 2009 by Kayla

science
explain how gravitational pull of the sun and inertia keep the earth in orbit around the sun?
Tuesday, October 6, 2009 by Aj

earth
When combining atoms, how do i use the balloons and letter notations to show the product formed?
Monday, October 5, 2009 by Tiffany

Trig
This problem is stumping me, can anyone help me? The Earth rotates every 24 hours (actually 23 hours, 56 minutes and 4 seconds) and has a diameter of 7926 miles. If you're standing on the equator, how fast are you traveling (how fast is the Earth spinning)? Compute this (a...
Sunday, October 4, 2009 by jake

Physics
You are explaining why astronauts feel weightless while orbiting in the space shuttle. Your friends respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating the acceleration of gravity 562 km above the ...
Sunday, October 4, 2009 by Jen

physics
the near earth asteroid Rendezvous (NEAR), after travelling 2.1 billion km, is meant to orbit the asteroid Eros at a height of about 15 km from the asteroidal center. Eros is roughly box-shaped, with dimensions 40km x 6km x 6km. Assume eros has a density (mass/ volume) of ...
Sunday, October 4, 2009 by jasmine

Physics
A canoe has a velocity of 0.490 m/s, 45 degrees southeast relative to the earth. The canoe is on a river that is flowing at 0.600 m/s east relative to the earth. Find the magnitude of the velocity vector v of the canoe relative to the river. Express your answer in meters per ...
Sunday, October 4, 2009 by Anonymous

Physics
At what altitude above the Earth's surface would your weight be three-fourths of what it is at the Earth's surface? Assume re = 6.371 10^3 km.
Saturday, October 3, 2009 by Amanda

10th grade English
This is my essay for the forum that I am attentding in few weeks time. The topic is shown below. Please make any corrections and check any awkward pharses A.S.A.P Thank you Can we balance Economic Growth and Environmental Conservation? Can we balance economic growth and ...
Saturday, October 3, 2009 by Andy

Science
How long would a day be in seconds if the Earth were rotating so fast that objects at the equator were apparently weightless?
Friday, October 2, 2009 by Sandy

Astro
What is the distance in meters from the Earth's center to a point out-side the Earth where the gravitational acceleration due to the Earth is 1/20 of its value at the Earth's surface?
Friday, October 2, 2009 by Ryrya

physics
Calculate the speed of a satellite moving in a stable circular orbit about the Earth at a height of 5400km.
Friday, October 2, 2009 by Lea

Science
It can be shown that for a uniform sphere the force of gravity at a point inside the sphere depends only on the mass closer to the center than that point. The net force of gravity due to points outside the radius of the point cancels. How far would you have to drill into the ...
Friday, October 2, 2009 by Natsi

Physics
Calculate the effective value of g, the acceleration of gravity, at 6400m , above the Earth's surface. Calculate the effective value of g , the acceleration of gravity, at 6200km , above the Earth's surface
Friday, October 2, 2009 by Lea

Earth Science
What is Floodplains? also i need information on what it is, how they start, where the mostly form. also the flood plains is on agriculture and how does it effect. i need to also know some pictures about flood plains also know the facts about it.
Thursday, October 1, 2009 by Earth Science

AP Literature
“Have you considered my servant Job, that there is none like him on the earth?” … and then things get really difficult for Job. In literature, proximity to God (or the gods) can be extremely dangerous to one’s health! Write a well organized, three to four ...
Thursday, October 1, 2009 by Yasmin

Earth Science
Describe how Earth would be different today if. It contained no radioactive material. What would the consequences be for the Earth's interior layer?
Wednesday, September 30, 2009 by Breanna

earth science
soil maps are used to do what
Tuesday, September 29, 2009 by joshua

earth science
1) What has happened to the ice in Greenland? What does Gore say will likely happen? 2) How high does Gore say sea level will rise if nothing is done? In how many years?
Monday, September 28, 2009 by Sarah

CHEMiSTRY PLEASE HELP
What is the mass of 4.2 kg of gold when it is transferred to a planet having twice the gravity of earth?
Sunday, September 27, 2009 by Jess

chemistry
51. What is the mass of 4.2 kg of gold when it is transferred to a planet having twice the gravity of earth? 71. You have a mixture of salt and sand that must be separated by using physical changes only. Describe what you would do to prepare dry samples of the two constituents...
Sunday, September 27, 2009 by Jess

Sci.
51. What is the mass of 4.2 kg of gold when it is transferred to a planet having twice the gravity of earth? 71. You have a mixture of salt and sand that must be separated by using physical changes only. Describe what you would do to prepare dry samples of the two constituents...
Sunday, September 27, 2009 by Jess

College Physics
A spy satellite is in circular orbit around Earth. It makes one revolution in 5.99 hours. (a) How high above Earth's surface is the satellite? (b) What is the satellite's acceleration?
Friday, September 25, 2009 by Megan

earth science
decribe the composition and nechanisms of the earth crust
Thursday, September 24, 2009 by tunday

science
an earhquake would be on earth as ______ would be on venus?
Thursday, September 24, 2009 by salman

Physical Science
If the southern hemisphere contains 10 percentland and the northern hemisphere contains 40 percent land, what percentof Earth is land?
Thursday, September 24, 2009 by Nathan

AP Physics (circular motion)
The moon revolves about the Earth in a trajectory that is very nearly a circle of radius r = 384,401 km, and requires 27.3 days (23.4 x 10^5 seconds) to make a complete revolution. What is the acceleration of the moon toward the Earth?
Thursday, September 24, 2009 by perry

social studies
what is one of the earth's seven large bodies of land is called what?
Wednesday, September 23, 2009 by shaina

science
erthquake would be on earth as _______ would be on venus?
Wednesday, September 23, 2009 by salman

Chemistry
Can someone please help me determine if these questions are correct. If there not can you point me in the rightdirection...please...please...and thank you! 1. Compared to the particles of a gas, the particles of a liquid a. Are not in constant motion b. Collide with the sides ...
Wednesday, September 23, 2009 by Jessie

physics
If a mole of atoms were spread uniformly over the surface of the Earth, how many atoms would there be per square meter?
Wednesday, September 23, 2009 by wong

Physics
The moon Europa, of the planet Jupiter, has an orbital period of 3.55 days and an average distance from the center of the planet equal to 671,000 km. If the magnitude of the gravitational acceleration at the surface of Jupiter is 2.36 times greater than that on the surface of ...
Tuesday, September 22, 2009 by Amzz

EARTH SCIENCE
I need four reasons the layers of the egg compare to the earth. so I have three 1. The shell compares to the crust 2. The white compares to the Mantle 3. The yolk is the core Then they also want : describe two other ways the egg compares to the earth. Can't think of any ...
Monday, September 21, 2009 by JJ

SCIENCE
A METHOD OF SENDING ENERGY WAVES FROM A SATELLITE TO AN AREA OF EARTH BEING OBSERVED IS?
Monday, September 21, 2009 by EIMEE

Science
Why is the angle of rays of sunlight so important in determining the amount of energy collected by the earth
Monday, September 21, 2009 by Skyler

Chemistry
Will someone please let me know if these answers are correct or not? If there not can you help me with them? Thanks so much in advance ;-) 1. In a tetrahedral molecule, how many unshared pairs of valence electrons does the central atom have? a. None b. One c. Two d. Three e. ...
Monday, September 21, 2009 by Taylor

geography
What is the Earth System that includes the Continental and Oceanic crust?
Monday, September 21, 2009 by Qwynne

Earth Science
Does feldspar has a higher value than iron-containing minerals and why. can someone answer the question? please help
Sunday, September 20, 2009 by Chris

Science
How would the solstices and equinoxes change if the earth's orbit were circular instead of elliptical? explain how a circular orbit would effect seasonal changes. can someone help? please
Sunday, September 20, 2009 by Ryan

Earth Science
can someone help me? you are given a sample of an unknown mineral. you determine that the mineral's streak is whte and its specific gravity is 2.8. is the mineral most likely to be a metallic mineral or a nonmetallic mineral? explain your answer. please help
Sunday, September 20, 2009 by NeedHelpPlz

Earth Science
I've been stuck on this question for half hour so please help me According to the principle of supply and demand, the price you pay for a product is determined both by its availability and by consumer demand for the product. on the basis of this principle, which minerals ...
Sunday, September 20, 2009 by NeedHelpPlz

Earth Science
a sample of magma flows very quickly. Would you expect it to contain high or low amounts of silica? Why? please help
Sunday, September 20, 2009 by NeedHelpPlz

science
Suppose the moon were closer to Earth. How would the force between Earth and the moon be different?
Sunday, September 20, 2009 by jasfjdkla

microeconomics
Earth Movers and Shakers operates 3 iron ore mines. This table shows their daily production rates given the number of miners at each mine. All of the miners work for the same wage. mine-----------tons---- # of miners mother lode------100-------25 scraping bottom---30-------10 ...
Friday, September 18, 2009 by haley

Language Arts (2nd Grade)
Question: Name 10 Community Things You Can Do To Help The Earth. I Cant Think of Any!! Help
Friday, September 18, 2009 by Ella

11th grade Biology
I have three questions that I can't find anywhere. 19) Organisms that are at the greatest risk when the dynamic equilibrium is upset would be the: A. Organisms at the top of the evolutionary tree B. Generalists C. Specialists D. Invertebrates E. All of the above 20) A ...
Friday, September 18, 2009 by Alicia

science
A helicopter is ascending vertically with a speed of 4.00 m/s. At a height of 185 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground?
Friday, September 18, 2009 by john

Earth Science
i need help on a question "Describe how Earth would be different today if it contained no radio active material. What would the consequences be for the Earth's interior layers?" please help and thanky you
Thursday, September 17, 2009 by Need Help

science
what move tectonic plates around earth?and how does it move the plates?
Thursday, September 17, 2009 by yin

science
will earth get smaller in the future?if does why?
Thursday, September 17, 2009 by yin

physical science
Diamonds are made 1. at the surface of earth 2. magma moving at supersonic speeds deep inside the earth 3. in river beads 4. in limestone caverns
Thursday, September 17, 2009 by Clarissa

Science
I am doing my homework and I need to know "Why is the angle of rays of sunlight so important in determining the amount of energy collected by the earth?"
Thursday, September 17, 2009 by Sara Kate

chemistry help
ok so i need to find how many atoms make up the earth. the average atomic mass of the atoms is 14g/mol. avogadro's number gives the number of atoms in a mole. so what atom do i take?? carbon or something??
Thursday, September 17, 2009 by RAYMOND

Earth Science
i need help on a question "Describe how Earth would be different today if it contained no radio active material. What would the consequences be for the Earth's interior layers?" please help and thanky you
Wednesday, September 16, 2009 by Anomynous

earth science
metric unit for length
Wednesday, September 16, 2009 by Raykym

earth science
what instument is used to find mass
Wednesday, September 16, 2009 by Raykym

earth science
What may form when falling precipitation runs off the surface of the ground? Explain how the form of precipitation may affect runoff. I don't understand what they are asking. What do they mean by "What may form?" does it mean like a puddle? or mudslide? or ...
Wednesday, September 16, 2009 by Michelle

science
which main earth system is the water apart of
Wednesday, September 16, 2009 by day

chemistry
The total surface area of earth is about 1.97*10^8 square miles. the surface area of land on earth is about 5.73*10^7 square miles. find the ratio of the surface area of land to the entire planet.?
Monday, September 14, 2009 by ashley

TRIG
please help two questions h t t p : / / w w w . j i s k h a . c o m / d i s p l a y . c g i ? i d = 1 2 5 2 9 6 7 1 5 7 also A surveillance satellite circles Earht at a height of h miles above the surface. Suppose that d is the distance, in miles, on the sruface of Earth that ...
Monday, September 14, 2009 by TRIG

science
i need help on a question a method of sending energy waves from a satellite to an area of earth being observed is my choices are conic projection GPS radar navigation
Monday, September 14, 2009 by Amber

Repost- Biology
Will someone please help me out.. I have been posted these questions for 7 hours .. but no one has helped me out..please help me out..I got to figure it out within today..please.. 1. Which of the following is a biotic factor that might affect the life of a water-dwelling ...
Sunday, September 13, 2009 by Anonymous

physics
can you walk me through this problem At what distance from teh Earth will a spacecraft on the way to the Moon esperience zero net force due to these two bodies because the EArth and Mon pull with equal and opposite forces? mass of earth = m1 = 5.98 E 24 kg mass of moon = m2 = ...
Sunday, September 13, 2009 by Physics

Biology
1. Which of the following is a biotic factor that might affect the life of a water-dwelling organism? A. Temperature of the water B. Speed of water current C. Pollutions in water D. Bacterial population in water My guess: D? 2. Which of the following things does NOT allow ...
Sunday, September 13, 2009 by Anonymous

Physics
I have no idea how to do this problem At what distance from teh Earth will a spacecraft on the way to the Moon esperience zero net force due to these two bodies because the EArth and Mon pull with equal and opposite forces? there\'s no data in the question to use
Sunday, September 13, 2009 by Physics

Earth Science
an evidence is a material or data that can be measured and tested to verify their prediction so wat is the difference to a scientific inquiry plz help and thank you
Saturday, September 12, 2009 by 2to1tony

Earth Science
wat is the difference between a hypothesis and a question? plz help and thank you
Saturday, September 12, 2009 by 2to1tony

TO BOBPURSLEY
acceleartiononmoon= GMassmoon/radius^2 =G 7.35E22/(1.74E6)^2= G 2.43E10= = 6.67E-11*2.43E10= 1.62 m/s^2 or as a gravitational field constant= 1.62 N/kg I have no idea why you used the mass of Earth. were did you get a = r^-2 Gm from i thought that the equation was net force = ...
Saturday, September 12, 2009 by TO BOBPURSLEY

Earth Science
an evidence is a material or data that can be measured and tested to verify their prediction so wat is the difference between evidence and scientific inquiry\ plz help and thank you
Saturday, September 12, 2009 by 2to1tony

physics
Calculate the acceleration due to gravity on the moon. The moon\'s radius is about 1.74 E 6 m and its mass is 7.35 E 22 kg ok aparently there\'s an easier way to do this I applied Newtons second law in the radial direction net force radial = m (radial acceleration) = ...
Saturday, September 12, 2009 by physics

Earth Science
wat is the difference between cooperation and peer review? plz help and thank you
Saturday, September 12, 2009 by 2to1tony

Earth Science
WAT IS THE DIFFERENCE BETWEEN SCIENCE AND TECHNOLOGY? plz help and thank you
Saturday, September 12, 2009 by 2to1tony

Earth Science
can someone help me? wat is the difference between the scientific theory and the scientific law? plz and thank you
Saturday, September 12, 2009 by 2to1tony

algebra
how do you write and solve an equation to determine the radius of mars the radius of earth is 6378.1 km, which is 2981.1 km longer than the radius of mars
Saturday, September 12, 2009 by delisa

AP Physics B
Calculate the force of gravity on a spacecraft 12,800 km (2 earth radii) aboce the Earth\'s surface if its mass is 1400 kg. Ok for this question I first converted to meters for the radius then applied newtons law net force radial = m1 a radial = Fg = r^-2 G m1 m2 Fg = (1....
Friday, September 11, 2009 by AP Physics B

science
how does the atmosphere spread solar energy over the earth
Wednesday, September 9, 2009 by renay

Geography
How does earth's revolution around the sun relate to seasons?
Wednesday, September 9, 2009 by Kaylee

5th grade
correct noun form please. bob know that he had to have the (earth's/earths) smell on him before the (horses/horses') would accept him.
Wednesday, September 9, 2009 by cody

Physics
A helicopter is ascending vertically with a speed of 5.00 m/s. At a height of 120 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? v_0 for the package equals the speed of the helicopter Help?
Tuesday, September 8, 2009 by Cara

physics
The diameter of the earth is about 7.6 x 10^3 miles. What is the linear velocity of a person, on the equator, in feet per second?
Monday, September 7, 2009 by Some kid

college/earth science
if unsaturated air at 23 degree celsius were to rise, what would its temperature be at 500 meters?
Saturday, September 5, 2009 by christina

Math
I need someone to check over this assignment that is for extra credit. I have include the problems as well as the answers . I thank you. Multiple Choice Questions (On Multiple Choice Questions, you do not need to show your work unless asked to.) 1. Write the word name for the ...
Saturday, September 5, 2009 by tamara jones

English
We're supposed to write a Reader's Response Journal on a passage from the book The Alchemist. I was wondering if mine sounded alright. Does it need any work? Is it sloppy or weak? ANY tips appreciated. :) ~~~ The King of Salem explained that a person’s Personal ...
Friday, September 4, 2009 by Danna

Earth Science
How many liters in 1000cm squared...I just don't get it?
Thursday, September 3, 2009 by kim

math
1. Number Sense: write three numbers that are greater than 1,543,000 and less than 1,544,000 2. Put the planets in order from the one closest to the sun to the one farthest from the sun. Earth 93,000,000 Jupiter 483,000,000 Mars 142,000,000 Mercury 36,000,000 Venus 67,000,000
Wednesday, September 2, 2009 by Bianca

american literature
When Jim arrives in Nebraska, he sees “nothing but land: not a country at all, but the material out of which countries are made.” Yet at the novel’s end the landscape is differentiated. It has direction and color – red grass, blue sky, dun-shaded bluffs. We...
Tuesday, September 1, 2009 by Jenny

6th grade
in my workbook it says why do you think earth looks like a blue and white marble from space ? the reason why is because there coler blind PLEASE HELP !!!!
Tuesday, September 1, 2009 by brittany

physics
what is the apparent angle the diameterof the moon subtends as seen from the earth in radians. average moon earth distance3.84*10e8 radius of the moon 1.74*10e6
Monday, August 31, 2009 by jakkila

Graphic Design
5. Which of the following statements regarding the Gestalt movement is true? A. Context has a great impact on reality. B. Expressive colors replaced traditional earth tones. C. Abstract art was born. D. Reality is given more precedence than perception. 6.
Monday, August 31, 2009 by Magic

Physics
1. What is the weight of a 24kg mass on Mars if its surface gravitaional field = 3.5N/KG? a) 235.2 N b) 84 N c) 24 kg d) 6.86 kg 2. A space shuttle is placed in a circular orbit around the Earth. It then thrusts its engine and moves to a new orbit, as shown below. Which ...
Monday, August 31, 2009 by Alfred

Physics
A very important experiment was carried out at the end of the 1800’s involving testing for the speed of the earth through the ether. (a) State the name of this experiment (b) Describe why the light beams are perpendicular to each other at one stage of the experiment. (c...
Monday, August 31, 2009 by Alfred

Physics
A student spins a 1.2kg rock around above her head horizontally in an experiment which aims to model how satellites orbit the earth. The student counts 3 orbits per second when the string produces an orbit radius of 35cm. (a) Calculate the centripetal force acting on the rock...
Monday, August 31, 2009 by Alfred

pre calc
an earth satellite in circular orbit 1250 kilometers high makes one complete revolution evry 90 min. What is it linear speed? use 6400 kilometers for the radius of the earth.
Sunday, August 30, 2009 by gab

earth science
COMPARE A HYPOTHESIS WITHA THEORY
Friday, August 28, 2009 by mohammad

Geography
Need help with these 2- 15. The six climate regions into which geographers have divided the earth are defined mainly by a. latitude and elevation b. temperature and precipitation c. atmospheric pressure d. location and landforms I'm not sure but I think it might be B or D ...
Tuesday, August 25, 2009 by mysterychicken

Geography
Can someone please help me with these questions? 7. Similar climates, vegetations, or landforms can be used to divide the earth into ________ a. political regions b. formal regions c. functional regions d. census regions I'm stuck on this one 10. The climate of Mount ...
Tuesday, August 25, 2009 by mysterychicken

Bio 100
I am researching a few animals for a scientific taxonomy and earth's biodiversity paper, and I am having trouble with one area... I chose the nine-banded armadillo and I need to answer this question....To what order does the mamal species you selected belong? Describe why ...
Monday, August 24, 2009 by Punkie

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Homework Help: Science