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September 28, 2016

Homework Help: Science: Earth

Recent Homework Questions About Earth

Geography
I'm writing a paper about sedimentary rocks. My goal is 700 words but I'm stuck. can someone read this and let me know if I'm overlooking some important facts? ************************************* Sedimentary rocks are rocks that have accumulated at the surface of...
Sunday, October 25, 2009 by pooleboy

Geography
Compare and contrast the various sources of energy. ---my teacher told me to do renewable and non-renewable. this is what i got: Energy sources are of two types: nonrenewable and renewable. Energy sources are considered nonrenewable if they cannot be replenished in a short ...
Sunday, October 25, 2009 by mysterychicken

SAT essay
Most of us tend to accept the opinions of the authority because we believe that those who are in the position of authority are more likely to know the truth and make wise decisions. However, the people in authority can sometimes make mistakes. If we stick to their ideas ...
Sunday, October 25, 2009 by Tiffany

earth science
Why are some crystals large and perfect, while others are small and irregular? The only answer in my book that seems close is : The crystal shape, hardness, cleavage and density of a mineral are determined by the internal arrangement of its atoms or ions. I don't see ...
Saturday, October 24, 2009 by devils

Geography
48. Discuss the various patterns of prevailing wind in each area of latitude (low, middle, high) --I posted this yesterday and bobpursley told me I had some wrong information so I fixed up the essay a bit. Is it OK? The air movements toward the equator are called trade winds- ...
Saturday, October 24, 2009 by mysterychicken

Geography
48. Discuss the various patterns of prevailing wind in each area of latitude (low, middle, high) --I posted this yesterday and bobpursley told me I had some wrong information so I fixed up the essay a bit. Is it OK? The air movements toward the equator are called trade winds- ...
Saturday, October 24, 2009 by mysterychicken

Biology
Which is the most common complex carbohydrate on earth? A. Starch B. Glycogen C. Cellulose D. Hemicellulose E. Chitin
Saturday, October 24, 2009 by blair

Physics
What is the work required to raise a 10. kg object from the surface of the Earth to a height of 2.0 m? 5.0 J 20. J 2.0 E2 J 2.0 E3 J My answer was 20. J but this was wrong. Is the answer 2.0 E2 J? A net force of 9.0 N acts through a distance of 3.0 m in a time of 3.0 s. The ...
Thursday, October 22, 2009 by Hannah

physics
A 2-kg block rests on a wall that is 3 m tall. What is the gravitational potential energy of the block? The force of gravity on Earth (g) is equal to 9.8 m/s2.
Thursday, October 22, 2009 by roxy

physics
It has been suggested that rotating cylinders about 12 mi long and 4.6 mi in diameter be placed in space and used as colonies. What angular speed must such a cylinder have so that the centripetal acceleration at its surface equals the free-fall acceleration on Earth?
Thursday, October 22, 2009 by Anonymous

science
If te earth did not turn how would the pattern of tides be affected
Thursday, October 22, 2009 by ts

Earth Scince
Can crude oil burn in the Earth if it comes in contact with magma?
Monday, October 19, 2009 by Sally

physics
suppose the moon were held in its orbit not by gravitational interaction with the Earth but by a long, mass-less cable attached to the center of the earth. What would be the tension in the cable?
Monday, October 19, 2009 by kwilli

Earth Science
On the surface of the earth, it is approximately 6,200 miles from the equator to the north or south pole. How many miles is it between 2 parallels 1 degree apart?
Sunday, October 18, 2009 by Krissy

10th grade English
This is the ruff draft of my speech on environment conservation. I am the first speaker of my group so if I mention some names or awkward ending, it is because of that. Please fix any awkward phrases or mistakes as soon as possible. Thanks Can we achieve both economic growth ...
Sunday, October 18, 2009 by Andy

9th grade (math)
the surface of our earth is 20'c for every km, k below the surface the tempature increses by 10'c. let t represent the tempature in 'c 1a write an equation that represent the relationship between disatnce k and t tempature 1b. what is the slope and and y-intercept
Saturday, October 17, 2009 by jacky

math
the serface of our earth is 20'c for every km, k below the surface the tempature increses by 10'c. let t represent the tempature in 'c 1a write an equation that represent the relationship between disatnce k and t tempature 1b. what is the slope and and y-intercept
Saturday, October 17, 2009 by jacky

PHYSICS
Suppose you are in a spaceship in freefall between Earth and the moon. How could you distinguish between a lead brick and an ordinary brick if you were blindfolded and wore gloves?
Friday, October 16, 2009 by Lor

math
the steps to a math quiz. the earth rotates once every 23 hours 36 minutes 4 seconds.how many seconds is that?
Friday, October 16, 2009 by luzia

Grammar and Composition
please check my answers: 1. Blunt is to dull as: a. effective is to useless b. unhappy is to ecstatic c. eerie is to mysterious d. challenge is to easy C 2. Odometer is to distance as: a. ruler is to inches b. uniform is to team c. detergent is to soil d. napkin is to table A ...
Thursday, October 15, 2009 by y912f

Physics
The mass of a certain planet is six times the mass of the earth and the diameter of the planet is twice the diameter of the earth. Find the acceleration od gravity on the surface of this planet. HELP ME SOLVE! THANKS!
Thursday, October 15, 2009 by Shane

Physics
What does it mean to say that angular momentum is conserved? Give an example of what you might see on Earth. How could conservation of angular momentum help astronomers understand the development of the solar system?
Wednesday, October 14, 2009 by Kayla

Physics
What does it mean to say that angular momentum is conserved? Give an example you might see on Earth. How could conservaton of angular momentum help astronomers understand the development of the solar system?
Wednesday, October 14, 2009 by Riley

physics
You are explaining to friends why astronauts feel weightless orbiting in the space shuttle, and they respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating how much weaker gravity is at h = 330 km above ...
Monday, October 12, 2009 by Elizabeth

physics
You are explaining to friends why astronauts feel weightless orbiting in the space shuttle, and they respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating how much weaker gravity is at h = 330 km above ...
Monday, October 12, 2009 by Elizabeth

math
on earth, in the absence of air, the rock in excersise 13 would reach a height of s=24t- 4.9t^2 meters in t seconds. How high would the rock go? (exercise 13:a rock thrown vertically upward from the surface of the moon at a velocity of 24m/sec reaches aheight of s=24t-0.t^2.
Monday, October 12, 2009 by sammi

earth science
list four methods that modern map-makers use to make accurate maps
Monday, October 12, 2009 by amber

physics
If an astronaut dropped a small rock near the surface of Pluto, how far (in m) would the rock fall in 1.1 s? (The mass of Pluto is 2.500×10-3 the mass of earth and the radius of Pluto is 0.18 of the earth's radius.)
Sunday, October 11, 2009 by Andy

Physics
A test rocket is fired vertically upward from a well. A catapult gives it an initial speed of 80.2 m/s at ground level. Its engines then fire and it accelerates upward at 4.20 m/s2 until it reaches an altitude of 960 m. At that point its engines fail, and the rocket goes into ...
Sunday, October 11, 2009 by Becky

physics
If an astronaut dropped a small rock near the surface of Pluto, how far (in m) would the rock fall in 1.1 s? (The mass of Pluto is 2.500×10-3 the mass of earth and the radius of Pluto is 0.18 of the earth's radius.)
Sunday, October 11, 2009 by Andy

Physics
The mass of Venus is 0.8140 times that of earth, and its radius is 0.950 times that of earth. Calculate the acceleration of gravity at the surface of Venus. Express your answer in g's (i.e. as a ratio to our acceleration of gravity). 9.01×10-1 is the correct ratio ...
Sunday, October 11, 2009 by Andy

Physics
A rock is falling towards the Earth. Suppose the action force is the pull of the Earth on the rock. What is the reaction force? I do not know how to find the reaction force.
Sunday, October 11, 2009 by Bryan

physics
A test rocket is fired vertically upward from a well. A catapult gives it an initial speed of 80.2 m/s at ground level. Its engines then fire and it accelerates upward at 4.20 m/s2 until it reaches an altitude of 960 m. At that point its engines fail, and the rocket goes into ...
Saturday, October 10, 2009 by Jamie

science
what is radio metric dating of the earth and how does it wor?
Saturday, October 10, 2009 by Tommy

physics
A meteor P is tracked by a radar observatory on the earth at O. When the meteor is directly overhead (theta = 90), the following observations are recorded: r = 80km, r'= -20km/s, and theta'= 0.4rad/s. (a) Determine the speed of hte meteor and the angle, beta, which it...
Saturday, October 10, 2009 by Jessi

physics
what is the angular speed of Earth around the Sun in radians per second
Friday, October 9, 2009 by craig

college
find an approxiamte value for the rate at which the moon orbits the earth. Assume that the moon's orbit is circular. the distance between the moon and earth is 382,000,000 meters.
Friday, October 9, 2009 by Jazmine Beatty

physics
A test rocket is fired vertically upward from a well. A catapult gives it an initial speed of 80.8 m/s at ground level. Its engines then fire and it accelerates upward at 3.90 m/s2 until it reaches an altitude of 920 m. At that point its engines fail, and the rocket goes into ...
Thursday, October 8, 2009 by blair

science
what factors should be kept constant when comparing your weight from mars to earth
Thursday, October 8, 2009 by sally

Physics
he weight of an astronaut on the moon is 127 N, where the value of 'g' is only 1.7 m/s2. What would the weight of this astronaut be on the Earth (in N)? I dont know if my attempt is rite? 127n/1.5ms^2 74.70N Divide 74.70N with earth value of G. What is the earths value...
Thursday, October 8, 2009 by Jenny

Physics
How would the sun's gravitational force on earth change if Earth had twice its present mass?
Thursday, October 8, 2009 by Allan Berger

Physics urgent
What is the weight of a 76 kg astronaut on the Moon where the value of 'g' is only 17% the strength of 'g' on the Earth? (Answer should be expressed in N).
Thursday, October 8, 2009 by moe

social study
what five themes do geographers use to study the earth?
Thursday, October 8, 2009 by Anonymous

physics
At what altitude above the Earth's surface is the acceleration due to gravity equal to g/128? i did g/128=(G*Earth's mass)/r^2 then solved for r and got 72080960. its within 10% of the correct answer but not correct. what am i doing wrong? (ive already rounding ...
Wednesday, October 7, 2009 by jawn

Earth Science
Why is the speed of Earth's rotation different at the equator than it is at the poles?
Wednesday, October 7, 2009 by Jackie

space
in whgich group are the spheres of earth listed in order of increasing density?
Wednesday, October 7, 2009 by siah

space
does taking a photo from outer space help earth spherical shape?
Wednesday, October 7, 2009 by Anonymous

earth science
how do you draw a landscape region?
Wednesday, October 7, 2009 by tiffany

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) I know that you said it is F * X and I'm just confused. Can you help me walk through this?
Wednesday, October 7, 2009 by Kayla

world geography
the word aborigine comes from the latin ab orgine and means: A)"the people" B)**"from the beginning" c)"out of the earth" D)"to the end"
Tuesday, October 6, 2009 by henry

2nd grade
what is a part of the earth that is shaped in a special way, is that a landform
Tuesday, October 6, 2009 by mike

Science
On the surface of the Earth, it is approximately 6,200 miles to the North or South pole. How many miles is it between two parallels 5 degrees apart?
Tuesday, October 6, 2009 by Meghan

Physics
A spaceship of mass m travels from the Earth to the Moon along a line that passes through the center of the Earth and the center of the Moon. (a) At what distance from the center of the Earth is the force due to the Earth five times the magnitude of the force due to the Moon? ...
Tuesday, October 6, 2009 by jawn

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

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Homework Help: Science