Wednesday
May 25, 2016

Homework Help: Science: Earth

Recent Homework Questions About Earth

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

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

physics
An earth satellite moves in a circular orbit with an orbital speed of 6200m/s. a) find the time of one revolution. b) find the radial acceleration of the satellite in its orbit.
Saturday, August 22, 2009 by colleen

math
The upper Angel Falls, the highest waterfall on Earth, is 750m higher than Niagara Falls. If each of the falls were 7m lower, the upper Angel Falls would be 16 times as high as Niagara Falls. How high is each waterfall? Use a chart.
Wednesday, August 19, 2009 by jessica

physics
As the earth rotates through one revolution, a person standing on the equator traces out a circular path whose radius is equal to the radius of the earth (6.38 106 m). What is the average speed of this person in meters per second?
Wednesday, August 19, 2009 by Anonymous

physics
take a satalite going around the earth... what allows us to say net force (radial) = Fg = Fr = ma were the Fg is the force of gravity exerted on the satalite were Fr is radial force and ma is the mass and acceleration of the satalite ok I understand newtons second law but what...
Monday, August 17, 2009 by physics

physics
"The actual value of computed g, assuming no drag, also varies somewhat over the earth's surface due to the earth's spin (which causes a latitude-dependent centrifugal force to get subtracted), lack of a perfect spherical shape of the earth, and the proximity of ...
Thursday, August 13, 2009 by physics

physics
Hi i'm doing that lab were you attach a weight to a tape which is also through a timer that puts marks on the tape at a given time interval ok I'm asked why is gravity different than on Earth? I don't rember the physics answer behind it I remeber Fg = G((m1 m1)/r^2...
Thursday, August 13, 2009 by physics

Physics
The diameter of the Moon is 3480km. What is the volume of the Moon? How many Moons would be needed to create a volume equal to the Earth? How do you find the volume of the Moon from just the diameter? Also, does anybody know how to figure out the volume of the Earth?
Tuesday, August 11, 2009 by Phillip

Physics
The Earth is surrounded by an electric field on its surface that points toward the center of the Earth with an average magnitude of 150 N/C. If there is an electron that is released in vacuum at the Earth’s surface, what will the acceleration due to the Earth’s ...
Monday, August 10, 2009 by Sammy

Physics
GPS can be used to determine positions with great accuracy. The system works by determining the distance between the observer and each of the several satellites orbiting Earth. If one of the satellites is at a distance of 20,000 km from you, what percent accuracy in the ...
Monday, August 10, 2009 by Zack

Physics
The Earth is surrounded by an electric field on its surface that points toward the center of the Earth with an average magnitude of 150 N/C. If there is an electron that is released in vacuum at the Earth’s surface, what will the acceleration due to the Earth’s ...
Monday, August 10, 2009 by Victor

check geo
places located in high latitudes have: a)the coldest climates on earth B)the same weather as places in other latitiudes. i choose a. places the atmosphere: A)create tides B)has no effect on heat gain or loss C)allows heat to escape quickly in order to cool the planet D)keeps ...
Saturday, August 8, 2009 by henry

check geo.
what are ice ages? A)periods of time glaciers receded to cover only the poles. B)eras during which earths orbit kept the planet far from the sun. C)periods of time when glaciers covered much of the earth. D)times when human and animal life thrived in high latitudes. .I chose ...
Saturday, August 8, 2009 by henry

check geo.
what are ice ages? A)periods of time glaciers receded to cover only the poles. B)eras during which earths orbit kept the planet far from the sun. C)periods of time when glaciers covered much of the earth. D)times when human and animal life thrived in high latitudes. .I chose ...
Saturday, August 8, 2009 by henry

Physics (Astronomy)
Hi, what keeps objects in orbit, for example, preventing the moon from crashing into the earth under the force of gravity? I have read that it speeds up as it gets closer to earth but I don't understand why. Can someone help me? Thanks.
Sunday, August 2, 2009 by Josh

English
I have this assignment that is due tonight and I need some help with it and these are the direction. The first stage of the journey begins in the Ordinary World. You anticipate the entire journey without knowing where it will take you. Draft the series of events and plot to ...
Monday, July 27, 2009 by Anonymous

calculus
Carbon-14 is a radioactive substance produced in the Earth's atmosphere and then absorbed by plants and animals on the surface of the earth. It has a half-life (the time it takes for half the amount of a sample to decay) of approximately 5730 years. Using this known piece ...
Friday, July 24, 2009 by j

Science
Summarize the hydrologic cycle, and how important this cycle is to earth.
Monday, July 20, 2009 by mike

english
Which of the following is not characteristic of the suras in the Koran? a. They are lyrical passages. b. They are written in rhymed Arabic verse. c. They emphasize the mercy of Allah. d. They emphasize the richness of life of earth. i think the answer should be D. am i right?
Sunday, July 19, 2009 by bindiya farswani

english
The lines "Some for the Glories of This World; and some/Sigh for the Prophet's Paradise ot come" in rubá'i #13 mean a. some people believe that heaven is to be found on earth b. somepeople seek God in this world while others believe God is in heaven c...
Sunday, July 5, 2009 by y912f

english
Which of the following is not characteristic of the suras in the Koran? a. they are lyrical passages b. they are written in rhymed Arabic verse c. they emphasize the mercy of Allah d. they emphasize the richness of life on earth D
Sunday, July 5, 2009 by y912f

just a ?
Do you think that it is even possible that we could live in a sustainable way at this point? In other words,even if our population growth decreased and each member of society was willing to contribute to sustainable living and protecting the environment, could the earth still ...
Saturday, July 4, 2009 by devon

science
Would you say,as a whole,we who live on the earth,are living sustainable or unstainable lifestyles.Why? Also in what ways might we be wasting our natural capital?
Tuesday, June 30, 2009 by devon

science
Say you have a million dollars that you can invest into a bank account for 10% interest each year. how much money will you have each year to live off of? If you use more than amount,what happens to your original capital? What happens to your sustainability? Relate this to our ...
Tuesday, June 30, 2009 by devon

earth
please write an essay about earth and its environment. please mention a suitable site
Friday, June 26, 2009 by ramesh reddy

geometry
You have looked at it two times before. There are 30 questions worth 30 points. Part 1 Multiple Choice: Select the best answer from the choices provided. (Each question is worth one point) 1. Determine how many wheels are turning clockwise. 1 2 none 2. Determine how many ...
Tuesday, June 23, 2009 by joe

physics
the speed of a car can be measured in s^-1 m right... it could be said that a speed of a car the velocity was 15 s^-1 m which is perfectly acceptable... by definition 15 s^-1 m can also be written as 15 Hz m just by definition... what on earth does that mean??? is velocity not...
Saturday, June 20, 2009 by Physics

SCIENCE (correct I hope)
Summarize the hydrologic cycle. How important is this cycle to Earth? The hydrologic cycle is a circulation of water from the oceans to the atmosphere and land, and back to the oceans. The hydrologic cycle starts with evaporation of water which comes from the oceans. The air ...
Friday, June 19, 2009 by scooby91320002

science
1) what is the mass of 10 cc of water? 2) why does a block of wood float on water? 3)how and why can density by used to identify an unknown substance? 4) describe the relationship between density, water, an d things that float please help me just need these answers to study ...
Wednesday, June 17, 2009 by matt

chemistry
A bird is flying around the world at a rate of 26.4 ft/sec. How many days will it take to complete its journey? (circumference of earth = 25,000 miles)
Tuesday, June 16, 2009 by Anonymous

physics
Find the period of revolution of an artificial planet if the semi-major axis of the planet’s elliptic orbit is greater than that of the Earth’s orbit by 24 x 10^6 km. It is given that the semi-major axis of earth orbit round the sum is 1.5 x 10^8 km.
Tuesday, June 16, 2009 by Sandhya

Science
Approximately what percentage of the estimated age of Earth does the Cenozoic Era represent and how do you know? look at pg. 9 in Earth Science Reference Tables? a. 1.4% b. 5.0% c. 11.9% d. 65.0%
Monday, June 15, 2009 by Angie

Physics
how many kilometers would you have to go above the surface of the earth for your weight to decrease to half of what it was at the surface? I know that the mass of earth is 5.97 x 10^24 kg do i have to convert it to km ??
Monday, June 15, 2009 by Sarah

French
You are on vacation in Paris, describe each attraction you visited. Can someone please check my work? Eiffel Tower The queue to get up the Tower was enormous, but, after an ice cream, I decided to go up. After 30 minutes of waiting in line, I managed to catch the lift. At the ...
Sunday, June 14, 2009 by Larry

earth science
Which one of the following objects will have the greatest force of gravity to the Earth at its surface . A large book B. A house C. A human being D. An average-size car i don't get it??
Saturday, June 13, 2009 by me

AP Physics
Using what's only in chapter one The Nature of Science Models, Theories, and Laws Measurement and Uncertainty; Significant Figuers Units, Standards, and SI System Converting Units Order of Magnitude: Rapid Estimating Dimensions and Dimensional Analysis How am I suppose to ...
Wednesday, June 10, 2009 by AP Physics

Physics
When astronomers find a redshifted celestial object, they say that the object is moving away from Earth. Can the redshift be interpreted as the Earth moving away from the celestial object?
Wednesday, June 10, 2009 by Izzy

Chemistry
Determine the potential (in V) of an electrochemical cell using a gold electrode and gold (III) [0.0243 M] solution in combination with a manganese/manganese (II) [0.00567 M] half cell How on earth would I do this question? I just know Au(3+) + 3e- = Au and E = 1.22 V
Wednesday, June 10, 2009 by Joe

physics
A 60 kg skier leaves the end of a ski-jump ramp with a velocity of 26 m/s directed 23° above the horizontal. Suppose that as a result of air drag the skier returns to the ground with a speed of 19 m/s, landing 8.3 m vertically below the end of the ramp. From the launch to ...
Tuesday, June 9, 2009 by mary

grammer
when arranging ideas for a research paper, what type of order are you using if you write a paper on the planets, starting with the pkanet closet to earth? a)chronological b)spartial c)impotance d)logical i picked a im i right. which is the introduction of a composition located...
Monday, June 8, 2009 by alley

earth/space science
How does length of the year change with distance from the sun?
Sunday, June 7, 2009 by nikcy

earth science
what is the greatest danger from volcanoes?? a. watery lava b. mud flows c. oxygen d. bulging of the earth's crust
Saturday, June 6, 2009 by matt

Earth Science
Is there a direct relationship between the eccentricity of its orbit and the distance a planet is from the sun?
Thursday, June 4, 2009 by Anonymous

language arts/earth science
hey people.. I'm preparing a speech for my language arts and earth science class (the speech is persuasive, about "why should we use geothermal energy"). so I was looking for some methods how to start my speech (introduction), how to end it, body language and ...
Wednesday, June 3, 2009 by emmi

Please help me think of a thesis statement
on how humans are destroying the earth.
Wednesday, June 3, 2009 by Jan

earth science
1. What observations show that the universe is expanding? 2. What can astronomers infer from the fact that other galaxies are moving away from ours? Please help! Thanks :)
Tuesday, June 2, 2009 by bunni

Math
The acceleration due to gravity is inversely proportional to the square of the distance from the centre of Earth. The acceleration due to gravity for a satellite orbiting 7000 km above the centre of Earth is 8.2 m/s^2. a) write a formula for this relationship. b) at what ...
Monday, June 1, 2009 by Halle

9th Grade Biology
Has plant life on earth evolved and have rose bushes always been around on earth?
Sunday, May 31, 2009 by Meghan

laws of motion
1Objects fall toward earth at a rate of 9.8 m/s^2 because of ______________ 2According to ________________________________ momentum lost equals momentum gained. 3The force keeping a ball on a string moving in a circle is _________________________. 4Anything that's thrown ...
Sunday, May 31, 2009 by Twilight lover

earth science
What evidence do astronomers use to detect black holes? please help and thank you :)
Sunday, May 31, 2009 by maya

Science
In the Earth Science Reference Tables (you can find them at google), on pg 11 on the bottom where there's the Earthquake Travel Time Graph, on the y-axis, what does each box equal? like for the x-axis, each box between 1 and 2, and 2 and 3 is 200 km, what what about the ...
Tuesday, May 26, 2009 by Angie

english
Homework help please i need to pass? in the play a midsummer night dream for the character Hermia i need help answering these question as if i were Hermia. (answer the questions like something Hermia would say) please really in depth answers please What does it mean to be a ...
Monday, May 25, 2009 by Bre

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Homework Help: Science