Saturday
December 3, 2016

Homework Help: Science: Earth

Recent Homework Questions About Earth

science
suppose an asteroid of radious 50m strikes the earth surface,what could be the impact of such collision
Saturday, December 19, 2009 by sukhbir

physics
What is the distance from the Earth's center to a point outside the Earth where the gravitational acceleration due to the Earth is 1/22 of its value at the Earth's surface? _ m
Friday, December 18, 2009 by asia

Biology 100
Read Ch. 9, section 9.1, How Did Life Originate? Reasearch a theory about the origin of life on Earth other than the one summarized under Piecing it Together on p. 247 of the text. Use the following key words and Web sites to assist you with your search: Origin of life, ...
Thursday, December 17, 2009 by Rayna

Biology 100
Read Ch. 9, section 9.1, How Did Life Originate? Reasearch a theory about the origin of life on Earth other than the one summarized under Piecing it Together on p. 247 of the text. Use the following key words and Web sites to assist you with your search: Origin of life, ...
Thursday, December 17, 2009 by Rayna

physics
An artificial satellite placed into earth's orbit has a mass of 1250kg. It travels at an average distance of 222.5km above the surface of the earth. The radius of the earth is 6370km. What acceleration due to gravity does the earth give the satellite? I know to find the ...
Wednesday, December 16, 2009 by sh

physics
Hint: for part I use G = 6.67 times 10 to the negative 11. for part II, you don’t need to do the full calculation, you can just use your knowledge of how force of gravity depends on mass and separation distance. Compare the gravitational force on a 49 kg mass at the ...
Tuesday, December 15, 2009 by chitra

Geography
Which statements describe the management of the earth's resources? Resource management becomes more important as the population increases. Resource management is a global issue. Resource management is a local issue. Resource management is a national issue. Resource ...
Tuesday, December 15, 2009 by george

science
HOW COULD MEASURING THE ORBIT OF A COMET HELP SCIENTISTS UNDERSTAND WHEN IT WILL NEXT BE VISIBLE FROM EARTH?
Monday, December 14, 2009 by NKEM

SCIENCE
HOW COULD MEASURING THE ORBIT OF A COMET HELP SCIENTISTS UNDERSTAND WHEN IT WILL NEXT BE VISIBLE FROM EARTH?
Monday, December 14, 2009 by ELIZABETH

annie
You want to get an idea of the magnitude of magnetic fields produced by overhead power lines. You estimate that a transmission wire is about 11m above the ground. The local power company tells you that the line operates at 13kV and provide a maximum of 86MW to the local area. ...
Monday, December 14, 2009 by physics help

English
1. We will lead your children to the joys of reading. 2. We will lead your children to the joy of reading. 3. We will lead your children to joy of reading. (Which expressions are grammatical? Are both acceptable?) 4. I learn many things in class from her kind teaching. 5. I ...
Saturday, December 12, 2009 by rfvv

DRAMA
1. "The best in this kind are but shadows" is A. Titania talking about men. B. Theseus talking about plays. C. Demetrius talking about the women he has loved in the past. D. Bottom talking about his fellow craftsmen. 2. One difference between tragedy and comedy is ...
Thursday, December 10, 2009 by Ari

Earth Science
According to Kepler's law of harmonies, which planet takes the longest to orbit the Sun?
Thursday, December 10, 2009 by Chris

earth
what type of magma flows very quickly
Thursday, December 10, 2009 by bobby

earth
What does the phrase "salt of truth" mean?
Wednesday, December 9, 2009 by joyce

force of gravity
A satellite orbits around the earth. The mass of the satellite is 1170 kg, and its altitude is 220 km. The mass of the earth is 5.98×1024 kg. The radius of the earth is 6.38×106 m. 1)What is the gravitational force on the satellite? 2)What is the orbital velocity ...
Wednesday, December 9, 2009 by ami

Science
1. Which one of the following frequencies of a wave in the air can be heard as an audible sound by the human ear? A. 0.10 Hz B. 10 Hz C. 1,000 Hz (my Answer) D. 100,000 Hz 2. If two waves with equal amplitudes and wavelengths travel through a medium in such a way that a ...
Wednesday, December 9, 2009 by Ari

Calc./ Physics
when apollo 15 astronaut David Scott dropped a hammer and a feather on the moon to demostrate that in a vacuum all bodies fall with the same (constant) acceleration, he droppes them from 4 feet above the lunar surface. the television shows them fallen more slowly than on earth...
Wednesday, December 9, 2009 by Rachel

adult education
making copious reference to fanon's text the wretched earth,give as many arguments for anti-colonial violence as you can identify in his essay.evaluate each of the arguments by considering objections against it and see if fanon's argument can be resued from the ...
Tuesday, December 8, 2009 by feyi

Earth Science
Considering the amount of energy required to produce animal-based foods and goods, should humans change their habits so they consume products closer to the bottom of the food chain because it is more efficient? PLEASE HELP.
Tuesday, December 8, 2009 by Lori

Earth Science
To measure the strength of an earthquake, you can use either a______scale or______scale. A)Richter B)seismograph C)mercalli intensity part:2 A)moment magnitude B)seismogram C)mercalli intensity
Monday, December 7, 2009 by george

Science
Deep within the earth, the process of mantle___?___drives plate tectonics A)convection B)subduction C)currents D)condensation
Monday, December 7, 2009 by george

science
why is the angle of rays of sunlight so important in determining the amount of energy collected by the earth
Monday, December 7, 2009 by j

Poetry, Part 2
1. Hopkins’s use of “seared,” “bleared,” and “smeared” is an example of A. metaphor. C. simile. B. assonance. D. alliteration. 2. A villanelle is A. a narrative poem written in blank verse. B. a formal poem using extensive repetition. C. a ...
Monday, December 7, 2009 by Ari

Earth Science
Where a major earthquake has happened in the past, but not in a while, is called a seismic? a)gap b)wave c)fault d)scale
Monday, December 7, 2009 by george

Astronomy
If stars should always be visible, where should you be located on earth? Can I answer this considering the celestial sphere and the ecliptic? I am not sure how...
Sunday, December 6, 2009 by O_o Rion

physics
Calculate the force of gravity on a spacecraft 12800 km above the earth's surface if its mass is 700 kg.
Sunday, December 6, 2009 by Cyn

Math
It takes the earth about 31,558,100 seconds to circle the sun. By how many seconds does this exceed the number of seconds in 365 days?
Sunday, December 6, 2009 by Noah

science
scientists often use models to study the movement of earth and it's moon. Why do they use models to study the movements? please help pretty pretty please with cherry on top!
Wednesday, December 2, 2009 by Lia Help!

physics bobpursly help still having trouble
A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment m=60 kg is ejected in the backwards direction so that it is stationary with respect to the earth and falls directly to the ...
Wednesday, December 2, 2009 by Andy

Science
scientists often use models to Study the movement of earth and it's moon. Why do they use models to study the movements?
Wednesday, December 2, 2009 by Lia Help!

physics
A rocket is launched straight up from the earth's surface at a speed of 1.80×104 m/s^2. a)What is its speed when it is very far away from the earth?
Tuesday, December 1, 2009 by kelly

physics!!!!
A spaceship passes Earth at a speed such that γ = 112. A creature aboard the vessel does the Mongoian greeting dance that takes it 21 s (on its clock -- bought on a previous visit -- which is why it reads in seconds) to perform. How long will the welcoming committee on ...
Monday, November 30, 2009 by Jordan

physics Bob Pursley plz help
A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment m=60 kg is ejected in the backwards direction so that it is stationary with respect to the earth and falls directly to the ...
Monday, November 30, 2009 by Andy

Physics Meteorite
A satellite in a circular orbit around earth with a radius 1.019 times the mean radius of the earth is hit by an incoming meteorite. A large fragment m=60 kg is ejected in the backwards direction so that it is stationary with respect to the earth and falls directly to the ...
Monday, November 30, 2009 by Andy

physics
what is the mass of a 1000N man on earth?
Sunday, November 29, 2009 by april

4th grade Science
How is the composition of Uranus different from Earth?
Sunday, November 29, 2009 by Hayley

physics
a space shuttle is in a cic ular orbit at a height of 250 km, where the acceleration os earth,s gravity is 93 percent of its surface value. that is the period of its orbit
Saturday, November 28, 2009 by james

physics
estimate the rotational kinetic energy of earth, assuming it to be a solid sphere of uniform density
Saturday, November 28, 2009 by devin

science
can you give me some facts and info bout how plate tectonics accounts for the features and processes that geoscientists observe in the earth -thank you
Friday, November 27, 2009 by Christina

Science
Can you give me some information and facts about the flow of matter and energy in the earth -thank you
Friday, November 27, 2009 by Christina

gr 11 physics
as a rocket carrying a space probe acceleraes away from earth the fuel is being used up and the rocket's mass becomes less when the mass of a rocket(and its fuel) is M and the distance of the rocket from eart's centre is 1.5rE, the force of gravitational attraction ...
Thursday, November 26, 2009 by mat

astronomy
Mars has a mean density less than the mean density of the Earth's mantle. How is it possible that Mars could have a metallic core given this fact? Hint: No calculations are required. Compare the densities used in part a) with the density of mantle rocks like basalt at one ...
Thursday, November 26, 2009 by o_O rion

astrophysics
Mars has a mean density less than the mean density of the Earth's mantle. How is it possible that Mars could have a metallic core given this fact? Hint: No calculations are required. Compare the densities used in part a) with the density of mantle rocks like basalt at one ...
Thursday, November 26, 2009 by cosmos

astrophysics
1) Every second the Sun outputs 3.90* 10^26 Joules of energy. Power is energy output per unit time and is given in units of Watts (W) where 1 W = 1 Joule per second. The Sun's power output is therefore 3.90*10^26 Watts. This is called the solar luminosity. As this energy ...
Tuesday, November 24, 2009 by Easha

astrophysics
1) Every second the Sun outputs 3.90* 10^26 Joules of energy. Power is energy output per unit time and is given in units of Watts (W) where 1 W = 1 Joule per second. The Sun's power output is therefore 3.90*10^26 Watts. This is called the solar luminosity. As this energy ...
Tuesday, November 24, 2009 by Easha

english II
Error in Sentence Consistency and Parallelism. the answer is b. A.If the rain would stop, then the grounds crew would uncover the infield and the game could resume. B.Cyclists and joggers are everywhere-on country roads, in city streets, on the boardwalk, and in the park. C.A ...
Tuesday, November 24, 2009 by Shaquitta

english II
sentence contain and error in adjectives and adverbs. The answer is a. A.Jupiter is more far away from the sun than is Earth. B.Today slim women are considered beautiful, but in the age of Rubens, pleasingly plump females were in fashion. C.An ace in the outfield, she caught ...
Tuesday, November 24, 2009 by Shaquitta

Math
You are standing on the equator of the earth (radius 3960 miles). What is your linear and angular speed?
Tuesday, November 24, 2009 by Anonymous

9th grade
each question is 10 points each, and i don't get 4 questions. I am in Earth Science and in 9th grade i would appreciate it if some one would help me. THANKS ! Where have earthquakes occurred most frequently during the last one hundred years? 1) in the polar regions 2) in ...
Monday, November 23, 2009 by Alicia

physics
An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? Is A the correct answer? a) That there is no reaction force-the net force on the object is zero, so the ...
Monday, November 23, 2009 by ronnie

physics
An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? I think the answer is B but not sure. a) That there is no reaction force-the net force on the object is ...
Monday, November 23, 2009 by maggie

physics
Mercury is an average distance of 5.79 x 107 km from the Sun. Estimate the length of the Mercurian year given that the Earth is 1.50 108 km from the Sun on the average. An explanation of how to do this would be great, thanks.
Monday, November 23, 2009 by Anonymous

physics
An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the reaction force is zero ...
Monday, November 23, 2009 by julia

physics
An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the reaction force is zero ...
Sunday, November 22, 2009 by Maggie

histroy
what is the name of the first set of humans that was on earth
Sunday, November 22, 2009 by paula

Atmospheric Science
One of the earliest examples of primitive humans, Australopithecus, lived in Africa between about 4 and 1 million years ago. For what fraction of Earth history have hominids been around?
Sunday, November 22, 2009 by Sandra

physics
An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the reaction force is zero ...
Sunday, November 22, 2009 by Maggie

physics
An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the reaction force is zero ...
Sunday, November 22, 2009 by Maggie

Physics
The Moon's period of revolution around the Earth is 27.3 d. How far away is the moon?
Sunday, November 22, 2009 by Amelia

physics
An object in the vacuum of space orbits the earth at a fixed speed in a circular orbit several hundred miles above the earth. What can we conclude about the reaction force? a) That there is no reaction force-the net force on the object is zero, so the reaction force is zero ...
Saturday, November 21, 2009 by maggie

sat essay
assignment:should people always prefer new things, ideas, or values to those of the past? Should people always prefer new thing to the old? Many people argue that we should not accept the new easily and should sick to the old. As far as I am concerned, we must always try our ...
Saturday, November 21, 2009 by Mercedes

physics
It has been suggested that rotating cylinders about 12 mi long and 5.4 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?
Saturday, November 21, 2009 by jb

Geography
26. Which of the following statements about New Zealand's first inhabitants is NOT true? a. the origin of the Maoris is in dispute by scholars b. the Maoris lost most of their land in the 1800s to British colonists. c. the Maoris are trying to reassert their claims to the ...
Friday, November 20, 2009 by mysterychicken

physics
A 71.4 kg satellite orbits the earth at a distance of 7.00E6 m from the center of the earth (a distance of 630 km above the earth's surface). How fast must the satellite be going to maintain its orbit if the free fall acceleration at this distance is 8.14 m/s^2?
Friday, November 20, 2009 by Alex

physic
Hi,could anyone help me with this questin please. Thank you so much. some folks on your planet waant to travel to the moon.But what happens to their clocks, it they leave the Earth?for other bodies, like the moon or planets the acceleration due to gravity at their surfaces ...
Friday, November 20, 2009 by Chan

Academy of Hospitality and Tourism at Erasmus
What is the earth science tables?
Thursday, November 19, 2009 by Sharina Summers

physics
In a gas at standard temperature and pressure, what is the length of the side of a cube that contains a number of molecules equal to the population of the earth (about 6 million people at present)? I know STP is 1 atm and 273K, but I have no clue how to start this problem. Any...
Thursday, November 19, 2009 by sarah

earth science
What effects do convection currents have on the mantle and crust that would not happen if convection currents didn't exist?
Wednesday, November 18, 2009 by Anna

Physics
An asteroid revolves around the Sun with a mean orbital radius twice that of Earth's. Predict the period of the asteroid in Earth years. (6.38*10^6 radius) I don't understand how to solve this problem.
Tuesday, November 17, 2009 by Angel

physics entry
A meteor headed straight towards the earth has an approach speed of 2.00e3 m/s at a distance of 7 earth radii from the center of the earth. What will be its speed when it reaches earth a 6.38e6 m(ignore the effects of atmosphere)?
Tuesday, November 17, 2009 by Andy

English
What makes our earth sick? - Steel cans make the earth sick. - Shampoo makes the earth sick. - Empty bottles make the earth sick. - Plastic bags make the earth sick. - ___________ make/makes the earth sick. (Are the answers all grammatical? What other expressions can we use in...
Tuesday, November 17, 2009 by rfvv

Earth Science
What are two forces that cause the Earth's surface to constantly change and what are their effects on the planet? Please help I do homeschooling and I'm super behind in science please answer before 12:00 p.m. on 11-17-09
Tuesday, November 17, 2009 by A.J.

Chemistry
About twenty radioisotopes with ultra-long half-lives, from 82 million years (244- Plutonium) to 6 million billion years (50-Vanadium) are found in the earth’s crust, yet no radioisotopes with half-lives less than 70 million years (146- Samarium) are found. Why not? Use ...
Monday, November 16, 2009 by Allie

Thomas Malthus
Thomas Malthus was a clergyman so is it safe to say that he did not believe in anything opposing the bible? Is it safe to say that as a firm believer in faith, he was certain that God created the Earth and the life on it? What can i say about Malthus's views on the Earth&#...
Sunday, November 15, 2009 by Lena

Physics
A satillite is orbiting the earth at a distance of 1.00X10^3 km above the surface of the earth. What is it's speed?
Sunday, November 15, 2009 by Juan

Physics
(a)Compute the value of G at a point in space that is 7.0X10^6 m from the center of the earth. What will be the value of G at a point with a radius twice that in (a)?
Sunday, November 15, 2009 by Juan

Physics
At what speed must a satellite of a mass M be launched horizontally at the surface of the earth if it's orbit is to be a circle just grazing the highest mountains?( assume no air resistance). How much time would elapse between successive passes of this imaginary satillite?
Sunday, November 15, 2009 by Juan

physics
Consider an asteroid with a radius of 15.5 km and a mass of 3.46E+15 kg. Assume the asteroid is roughly spherical. What is the acceleration due to gravity on the surface of the asteroid? Suppose the asteroid spins about an axis through its center, like the Earth, with a ...
Sunday, November 15, 2009 by Hamp

ap enviromental
for a very long time, prokaryotes were the only living creatures on earth. how long a period? i would appreciate a straight answer please!!!
Thursday, November 12, 2009 by gab

physics
A plane flying horizontally above Earth’s surface at 150. meters per second drops a crate. The crate strikes the ground 30.0 seconds later. What is the magnitude of the horizontal component of the crate’s velocity just before it strikes the ground? I know the answer ...
Thursday, November 12, 2009 by Physics Student need help

Hurricanes are very dangerous
could you help me find something that will help me write a paragraph on hurricanes are very dangerous to earth and people causing tremendous devastation.
Thursday, November 12, 2009 by Tim

English
Shy I, with earth, share mirth Muse over goodwill's dearth Meaning sinning find in few Due to high IQ, I find you in long queue Bird herd shepherd owl eerie make night dreary Lone lamppost Tree big bloom bird host Hello shallow call wall view On frond shine morn dew Haunt ...
Thursday, November 12, 2009 by Briana

algebra 2
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. 1.1. the weight of an object follows this equation: , where C is a constant, and r is the distance that the object is from the center of the earth...
Thursday, November 12, 2009 by linda

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 ...
Thursday, November 12, 2009 by linda

algebra
I need help badly with this assignment. If Venus is 33.3 million miles farther from the sun than Mercury, then Earth is 25.6 million miles farther from the sum than venus. When the total of the ditances for these three planets from the sum is 191.2 million miles, how far away ...
Thursday, November 12, 2009 by Sarah

science
which of earth's spheres extends into all others
Wednesday, November 11, 2009 by ben

science
which of earth's spheres extends into all others? i think it would be the Biosphere because overlaps virtually the entire hydrosphere and portions of the atmosphere
Wednesday, November 11, 2009 by janet

science
Which of Earth's spheres extends into all others? explain how
Wednesday, November 11, 2009 by janet

science
Which of Earth's spheres extends into all others? explain how
Wednesday, November 11, 2009 by janet

sat essay
please give me some advice. thank u! assignment:Is the way something seems to be not always the same as it actually is ? Most people tend to consider what they see as facts or truth. As far as I am concerned, what we see is sometimes conceiving and misleading. Things are not ...
Wednesday, November 11, 2009 by tiffany

sat essay
please give me some advice. thank u! assignment:Is the way something seems to be not always the same as it actually is ? Most people tend to consider what they see as facts or truth. As far as I am concerned, what we see is sometimes conceiving and misleading. Things are not ...
Wednesday, November 11, 2009 by tiffany

earth
What is the difference between a resource and a condition
Tuesday, November 10, 2009 by Remy

English
1. What makes our earth sick? Gases from cars make the earth sick. Paper cups make the earth sick. _________ make(s) the earth sick. _________ make(s) the earth sick. (Would you name what makes the earth sick? The more,the better. The things suitable for the subject? Thank you.)
Tuesday, November 10, 2009 by rfvv

Physics
Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. Assume that the Earth-Moon (center-to-center) distance is 3.82 multiplied by 108 m and Earth's radius is 6....
Monday, November 9, 2009 by Ray

Physics
An astronaut stands on the edge of a lunar crater and throws a half-eaten Twinkie™ horizontally with a velocity of 2.2 m/s. The floor of the crater is 95.4 m below the astronaut. What horizontal distance will the Twinkie™ travel before hitting the floor of the crater...
Monday, November 9, 2009 by Katie

algebra
the profit made fram the sale of a dvd players from a company is found by subtracting the costs from the revenue. p=r+-c. Suppose that the companys revenue can be expressed with the function R(x)=x^2+59x and that the total costs for the company can be determined by the ...
Monday, November 9, 2009 by melissa

Grammar and Composition
I have to write a speech and record it on a tape. Pet Peeve Speec You will create a "Pet Peeve" Speech. A "Pet Peeve" is one of those little every day occurrences that bugs you, upsets you, or frustrates you. You will use the extemporaneous delivery for ...
Sunday, November 8, 2009 by y912f

earth science
Describe the change in duration of insolation from the Equator to the North Pole A) In the winter b) In the summer c) on the Equinox
Sunday, November 8, 2009 by Nadine

earth science
Describe the change in duration of insolation from the Equator to the North Pole A) In the winter b) In the summer c) on the Equinox
Sunday, November 8, 2009 by Nadine

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Homework Help: Science