Thursday
February 23, 2017

Homework Help: Science: Earth

Recent Homework Questions About Earth

Science-Damon
Describe how the movement of Earth is responsible for day and night. The movement of earth is responsible for day and night because as it rotates counterclockwise we tend to have this result. The part of earth that faces the sun experiences daylight, and the part that faces ...
Saturday, February 6, 2010 by Sara

Physics
Calculate the speed needed by a spacecraft to maintain a circular orbit at about 350 km above Earth’s surface. (it's a project where we create our own spaceship. let's say the craft is 500kg) --- Not sure about the formula to find this. All I know is that it may have ...
Saturday, February 6, 2010 by Ben

Science-Repost
Describe how the rotation of Earth is responsible for the movement of the stars. The rotation of earth is responsible for the movement of stars because as it rotates, objects around it rotate as well, such as planets, they appear to move through the stars because they are that...
Saturday, February 6, 2010 by Sara

Science-Repost
Describe Earth's rotation in terms of its axis and length of time to rotate. Earth's axis has never pointed in the same direction. It slowly traces a circle every 26 000 years. The tilt of the earth's axis isn't usually pointing straight up. It traces a circle and it tends to ...
Saturday, February 6, 2010 by Sara

Science
If you were to look down on Earth from above the North Pole, in which direction would Earth appear to rotate? If you were to look down on Earth from above the North Pole, then earth would appear to rotate in a counter-clockwise direction. More info would be appreciated, thanks.
Friday, February 5, 2010 by Sara

Science
Describe how the movement of Earth is responsible for day and night. The movement of earth is responsible for day and night because as it rotates counterclockwise we tend to have this result. The part of earth that faces the sun experiences daylight, and the part that faces ...
Friday, February 5, 2010 by Sara

Science
Describe Earth's rotation in terms of its axis and length of time to rotate. The earth's axis slowly changes in the way it points. It changes direction over time. One effect of this precession, is the changing position of the North Celestial Pole. It takes 26 000 years to ...
Friday, February 5, 2010 by Sara

Science
Describe how the rotation of Earth is responsible for the movement of the stars. The rotation of earth is responsible for the movement of stars because as it rotates, objects around it rotate as well, such as planets, they appear to move through the stars because they are that...
Friday, February 5, 2010 by Sara

Physics
An electron is relased into a uniform electric field of magnitude 8.35 N/C. How many times larger is this electrons acceleration than the acceleration due to gravity on the surface of Earth? Is it just F= qE = ma (for the electron, and using E for electric field), and then ...
Friday, February 5, 2010 by ggget PHYSICal

chem.
How much heat would be required to warm Earth's oceans by 1.0 degree celsius ? Assume that the volume of Earth's oceans is 137x10^7 km^3 and that the density of seawater is 1.03 g/cm^3. Also assume that the heat capacity of seawater is the same as that of water. Earth's oceans...
Friday, February 5, 2010 by Al

chemistry
Global warming refers to the rise in average global temperature due to the increased concentration of certain gases, called greenhouse gases, in our atmosphere. Earth's oceans, because of their high heat capacity, can absorb heat and therefore act to slow down global warming. ...
Friday, February 5, 2010 by Al

earth science
what glaciers no longer exist in alaska?
Friday, February 5, 2010 by pat

physics
A canoe has a velocity of 0.490 southeast relative to the earth. The canoe is on a river that is flowing at 0.520 east relative to the earth creating a 45 degree angel between the two velocities.Find the magnitude of the velocity of the canoe relative to the river.
Wednesday, February 3, 2010 by Anonymous

Biology
Why was the discovery of microspheres and coacervates an important contribution to the understanding of how life might have originated on Earth?
Wednesday, February 3, 2010 by brooke

astronomy
Astronauts on the Moon look back at Earth, a distance of about 400,000 km away. If the cities of Washington, D.C. and New York are separated by 300 km, what will be the angle between them when viewed from the Moon?
Wednesday, February 3, 2010 by laura

Physics
the temperature at the surface of the sun is approximatly at 5700K and the temperature at the surface of the earth is approxiamtly 290 K. what entropy change occurs when 1100 J of energy is transfered by radiation from the sun to the earth?
Tuesday, February 2, 2010 by jenn

Environmental Science
are these correct? 29. A common feature of thermal pollution and artificial eutrophication is that they both a. ave sources that are idfficult to identify and control b. cause large mats of algae to bloom in fresh water c. are a result of power plants and other industrial ...
Monday, February 1, 2010 by y912f

Physics
At a place directly below a thundercloud, the induced electric charge on the surface of the Earth is +1.0 X 〖10〗^(-7) coulomb per square meter of surface. How many singly charged positive ions per square meter does this represent? The number of atoms on the ...
Monday, February 1, 2010 by Josslyn

Chemistry
Which of the following surfaces does a true monolayer always form on? A. silicon B. gold C. both D. neither Why are silicon surfaces studied in this experiment? A. Silicon is shiny like the windows in tall buildings. B. Silicon more closely represents environmentally relevant...
Saturday, January 30, 2010 by Ann

Earth Science
Tomorrow will be sunny with high clouds. What does this statement describe?
Saturday, January 30, 2010 by Mike

physics
The spectrum of light from the galaxy M100 has a prominent dark line at a wavelength of 592.2 nm. The same spectral line observed in a lab on earth has a wavelength of 589.4 nm. How fast is M100 moving relative to earth? (the speed of light = 3.00 x 108ms-1)
Friday, January 29, 2010 by Mota

Earth science
Please go over my answers and tell me what I got wrong... Telling me the correct answer would also be nice please hurry I only have 20 mins What does the principle of uniformitarianism tell us about the past? (Points: 5) The past is the key to the future. X The present is the...
Friday, January 29, 2010 by Ario

earth science
if you didn't know these cities were all cities of the United States, how could you tell from the temperature curves that they were all in the Northern Hemisphere?
Thursday, January 28, 2010 by susan

Earth Science
Which of the following help create volcanoes? plate tectonics landslides cracks in Earth's crust built up magma
Thursday, January 28, 2010 by help

social studies
what were the lines of defence dug into the earth? and what was willsons plan for peace?
Wednesday, January 27, 2010 by selena

Environmental Science
29. A common feature of thermal pollution and artificial eutrophication is that they both a. have sources that are difficult to identify and control b. cause large mats of algae to bloom in fresh water c. are a result of power plants and other industrial activity d. decrease ...
Wednesday, January 27, 2010 by y912f

math
I have a math problem. A Mars year is 1.88 Earth years. If you are 13 years old in Earth years, about how would you be in Mars in Mars years? Thanks
Tuesday, January 26, 2010 by jared

science
What do earth`s plates float on?
Tuesday, January 26, 2010 by Sarah

PHYSICS-radiation
Four billion years ago the Sun’s radiative output was 30% less than it is today. (i) If we assume the radius of the sun is the same, and that the Earth’s atmosphere was the same as it is now (that is, the atmosphere absorbs 10% of the incoming solar radiation and 80% of ...
Sunday, January 24, 2010 by RANI

Geology
Can someone help me with these questions I have some material for them but not enough. • First-- Compare and contrast the geological features of a desert landscape and glacial landscape. Describe at least one process that creates the resulting landforms of each. Second--• ...
Sunday, January 24, 2010 by Jen

Physics: fictitious forces
A plumb bob does not hang exactly along a line directed to the center of the Earth's rotation. How much does the plumb bob deviate from a radial line at 39.0° north latitude? Assume that the Earth is spherical. This was in my textbook with an angle of 35 instead of 39 and the...
Sunday, January 24, 2010 by ucieng

English I
Respond to the question presented by the poet. "..if there were a fire in a museum which would you save, a Rembrandt painting or an old woman who hadn't many years left anyhow?" Explain your answer. "Ethics" In ethics class so many years ago our teacher asked this question ...
Sunday, January 24, 2010 by Candace

PHYSICS
Four billion years ago the Sun’s radiative output was 30% less than it is today. (i) If we assume the radius of the sun is the same, and that the Earth’s atmosphere was the same as it is now (that is, the atmosphere absorbs 10% of the incoming solar radiation and 80% of ...
Sunday, January 24, 2010 by Sunshin3

physics
how does the gravitational force exerted by earth on the sun compare with the gravitational force exerted by sun on the earth? and would you expect tides to be higher at the equator or at the north pole? why?
Sunday, January 24, 2010 by amar

physics
A car travels due east with a speed of 35.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 40.0° with the vertical. Find the velocity of the rain with respect to the ...
Sunday, January 24, 2010 by Michelle

PHYSICS
1. It is believed that in the Archeaneon (2.5-4 billion years ago) the sun’s radiative output was 30% less than it is today. (i) What would the temperature of the sun have been at that time? (ii) At what wavelength would the peak emission from the sun have been? (iii) ...
Saturday, January 23, 2010 by HELP! PLEASE!

Physics
A plumb bob does not hang exactly along a line directed to the center of the Earth's rotation. How much does the plumb bob deviate from a radial line at 38.5° north latitude? I got my answer to be 0.122288439 deg but it was incorrect. I used theta= a(sin 38.5)/g (which ...
Saturday, January 23, 2010 by Anonymous

PHYSICS- SCIENCE
1. It is believed that in the Archeaneon (2.5-4 billion years ago) the sun’s radiative output was 30% less than it is today. (i) What would the temperature of the sun have been at that time? (ii) At what wavelength would the peak emission from the sun have been? (iii) ...
Saturday, January 23, 2010 by Sheena

Science
1. It is believed that in the Archeaneon (2.5-4 billion years ago) the sun’s radiative output was 30% less than it is today. (i) What would the temperature of the sun have been at that time? (ii) At what wavelength would the peak emission from the sun have been? (iii) ...
Saturday, January 23, 2010 by Sheena

Language Arts
I think that I shall never see A poem lovely as a tree. A tree whose hungry mouth is prest Against the earth’s sweet flowing breast; A tree that looks at God all day, And lifts her leafy arms to pray; A tree that may in summer wear A nest of robins in her hair; Upon whose ...
Saturday, January 23, 2010 by Anonymous

Physics
Your dog has been diagnosed with a terminal illness for which there is no cure. The Veterinarian expects that it will live for 1 year before it succumbs to the condition. You have the idea that if you could keep the dog alive a little longer, a cure might be found. You decide ...
Friday, January 22, 2010 by Jon

space
What is the force of gravity at 220 miles above Earth's surface? Calculate how much of a g force the astronauts are actually experiencing. The solution for this math problem is a percentage. You can calculate it using the Algebraic equation: gr = R2/r2 x g R = the radius of ...
Thursday, January 21, 2010 by Annie

physics
what happens to acceleration due to gravity if you climb the tallest mountains on the earth ?
Thursday, January 21, 2010 by brittany

Science
Talking about Yellowstone National Park Native Amiercans referred to Yellowstone as a place where _______________ General _______________ was the first to name many of the geysers Yellowstone is the result of a _______ _________ tat came up from the Earth's mantle.
Wednesday, January 20, 2010 by Ime

College Chemistry
So i been trying to solve this question like for ever! so i hope you guys can help me , here is the question : the volume of a seawater on earth is about 330,000,000 mi3. if seawater is 3.5% sodium chloride by mass and has a density of 1.03g/mL, what is the approximate mass of...
Tuesday, January 19, 2010 by Tasneem

physics
Suppose that the attraction between the moon and the earth were due to Coulomb forces rather than gravitational force. What would be the magnitude of the charge required if equal but opposite charges resided on both earth and moon? Mass of earth = 5.98×1024 kg; mass of moon...
Tuesday, January 19, 2010 by Andy

physics
The engine of a toy rocket supplies an average acceleration of 38.0 m/s/s to the rocket for an interval of 0.80 s. A.)If the toy roocket is launched vertically, how high does it rise in this interval? B.) How fast is the rocket moving at the end of 0.80 s? C.) What altitude ...
Tuesday, January 19, 2010 by Kendra

Environmental Sciencee
2. The water resources of the Earth are located in a. salt water fround in the ocean b. fresh water found in icecaps and glaciers c. fresh water found in rivers, lakes, and streams d. all of the above D
Tuesday, January 19, 2010 by y912f

Environmental Sciencee
Please help me on this question: 33. Wind and water alter the Earth's sufrface by a. blowing away soil and eroding soft rocks b. eroding coastlines c. carving deep gorges d. all of the above I read about this a long time ago, so I don't even remember where it is in my book. ...
Tuesday, January 19, 2010 by y912f

science
Using this concept, what role do we each play in sustaining life on Earth? How do our food choices affect our own consumption of the nonrenewable energy available to sustain life?
Tuesday, January 19, 2010 by Barb

3rd grade science
Solar System Project: I would like to know if the moon is between earth and mars. I am making a shoe box model of the solar system. I have to put the planets in order. That's all I need to know. Thanks a bunch!!!
Monday, January 18, 2010 by Miranda

earth
Sometimes streams and rivers run in fairly straight lines. Sometimes, they meander or curve and wander. What is your idea about how faster water affects the shape of a stream or river? A) Faster streams are straighter. B) Faster streams curve more. C) The speed of the stream ...
Monday, January 18, 2010 by Sarah

physics
Newton assumed that a gravitational force acts directly between Earth and the Moon. How does Einstein's view of the attractive force between the two bodies differ from Newton's view?
Saturday, January 16, 2010 by kendra

physics
during space flight, astronauts often refer to forces as multiples of the force of gravity on earth's surface. what does a force of 5g mean to an astronaut?
Saturday, January 16, 2010 by kendra

Thomas Paine
The cause of America is in a great measure the cause of all mankind. Many circumstances hath, and will arise, which are not local, but universal, and through which the principles of all Lovers of Mankind are affected, and in the Event of which, their Affections are interested...
Saturday, January 16, 2010 by Kelly

earth
A man with a weight of 1000 newtons on earth visits each planet what is his weight on each?
Saturday, January 16, 2010 by Anonymous

space
why cant petrol driven cars we use on earth be used on the earth?
Saturday, January 16, 2010 by Anonymous

earth
1) On a horizontal straight line graph of distance (vertical axis) against time, which variable is not changing? a) Distance b) Time c) Wind speed d) Temperature 2) A graph of distance against time is a straight line with a slope of 1. If you wait for 3 time units to pass, how...
Friday, January 15, 2010 by Sarah

english
what is being said in the following line:   “Foul devil, for God’s sake, hence, and trouble us not; For thou hast made the happy earth thy hell, Fill’s it with cursing cries and deep exclaims.”
Friday, January 15, 2010 by kim

physics(universal law of gravitation)
a satellite has a mass of 100 kg and is located at 2 x 10^6 m above the surface if the Earth. wHAT is the potential energy associated with the satellite at this location? What is the magnitude of the gravitational force on the satellite?
Thursday, January 14, 2010 by Nina

Earth Science
Plinian eruptions are the most powerful type of eruption. They are usually caused_______magma. A)rhyolitic B)bybasaltic C)andesitic
Thursday, January 14, 2010 by george

Precalculus
Can someone check my answers please? Thank you :) 30. What is Earth's rotational speed at (a) Bangor, Maine (latitude 45 degrees N) and (b) Rio de Janeiro, Brazil (latitude 23 degrees S)? (It's given in the problem also that Earth's rotational speed at the equator is about 1,...
Wednesday, January 13, 2010 by Emily

AP English
From The Great Gatsby by Fitzgerald Tom flung open the door, blocked out its space for a moment with his thick body, and hurried into the room. “Mr. Gatsby!” He put out his broad, flat hand with well-concealed dislike. “I’m glad to see you, sir. . . . Nick...
Tuesday, January 12, 2010 by Priscilla

11th grade
Four point charges of 89.67, 16.46, 12.1, and 19.76 microcoulombs are located at the corners of a rectangle of length 42 cm and width of 638 cm, as shown. A sodium ion is placed at the point halfway between 16.46 and 12.1, and then released from rest. What will be its speed ...
Monday, January 11, 2010 by tv

Physics
Four point charges of 89.67, 16.46, 12.1, and 19.76 microcoulombs are located at the corners of a rectangle of length 42 cm and width of 638 cm, as shown. A sodium ion is placed at the point halfway between 16.46 and 12.1, and then released from rest. What will be its speed ...
Monday, January 11, 2010 by tv

Math
"during the opening sequences of " the day the earth stood still " the alein craft orbits the earth at 6437.376 kph. If the spaceship is flying 1.25km above the surface area of the earth , a) find the distances travelled to make a single orbit of the earth . b) the time it ...
Monday, January 11, 2010 by Rogan Anantharajh

geography
Which statements describe the management of the earth's resources? 1)Resource management becomes more important as the population increases 2)Resource management is a global issue. 3)Resource management is a local issue. 4)Resource management is a national issue. 5)Resource ...
Monday, January 11, 2010 by george

English
Hey, I was wondering if I could get some help looking for figurative language in this poem, like simile, assonance, alliteration, personification, metaphor, onomatopoeia, ext. Thanks! What do I care that the stream is trampled, the sand on the stream-bank still holds the print...
Sunday, January 10, 2010 by Briana

physics
does anyone know who conducted the experiment or a credible description of the experiment that helped prove Einstein's thought experiment: the twin paradox? as in the experiment in which one cesium-beam atomic clock stays on Earth, while another one takes flight and the time ...
Sunday, January 10, 2010 by frank

earth science
how do the four subsystems of earth interact with one another
Friday, January 8, 2010 by shaquetta

earth science
what are the landscape regions that the hudson river flows through
Thursday, January 7, 2010 by david

physics
The distance from the center of the earth to a point where the acceleration due to gravity is g/16 is none of the these. 4RE. 3RE. 16RE. 1/4RE.
Thursday, January 7, 2010 by jesse

Geography
question: Compare and contrast the various sources of energy. answer: There are various sources of energy, which modern industrial countries use to light cities, power cars and airplanes, and run computers and other electrical machines. The main energy sources for all these ...
Thursday, January 7, 2010 by y912f

English
1)A considerate person is someone that (or only who is possible) always thinks of others 2)In Montgomery , Alabama, black people were not allowed to do a lot of things, for example go to restaurants, sit in the front of buses (is for example correct: can I use such as to go to...
Thursday, January 7, 2010 by Franco

PHYSICS
a 17 of model plane is flying at a horizontal speed of 14 m/s the plane goes into a dive and levels off 21 m closer to the earth what was the ammount of potentiomal energy lost in the dive
Wednesday, January 6, 2010 by landon

Science
What is th weight on earth of a girl with a mass of 30 kg?
Tuesday, January 5, 2010 by Janise

science
When is the Earth farthest from the sun?
Tuesday, January 5, 2010 by Joe

Technology
(this post never got answered :() I need help with these two questions: 1. Sheet metal and copper piping are examples of a. natural resources b. industrial products c. consumer products d. standard materials I think it's either B or D 2. Which of the following would be ...
Monday, January 4, 2010 by y912f

Geography
Here are some questions that I need help on: 7. Similar climates, vegetation, or landforms can be used to divide the earth into a. political aregions. b. formal regions. c. functional regions. d. census regions. I know it's not c or d. I think it's B 11. All of the following ...
Monday, January 4, 2010 by y912f

science
what planet has almost the same density as earth?
Monday, January 4, 2010 by Aaron a.k.a A7X

Physics
What is the gravitional potential energy of a 100-kg rocket when it is at a distance of 1.0 x 10^7 m from the center of the earth. {Assume G = 6.7 x 10^ -11 m^3 / kg x s^2 and Earth's mass is 6.0 x 10^ 24 kg} GIVEN: m1 = 100 kg d = 1.0 x 10^7 m Earth's m2 = 6.0 x 10^ 24 kg G...
Monday, January 4, 2010 by Priscilla

Earth Science
Two meanings for the horizontal lines on the geologic History NYS chart.
Sunday, January 3, 2010 by Ann

Physics
What is the weight (in Newtons) of an object with a mass of 25 kg on the surface of the Earth?
Sunday, January 3, 2010 by Aly

earth
limestone and marble are both used in sculpting. Limestone become marble under heat and pressure. Classify each rock and tell which would be harder to sculpt
Sunday, January 3, 2010 by Dominic

Science
In __, the amplitude of the carrier wave is changed to transmit information; the frequency is not changed. In __, the frequency of the carrier wave is changed __ phones and __ phones use radio waves to transmit signals. __ use electromagnetic signals from a base station ...
Sunday, January 3, 2010 by Michael Jones

Physics
At the distance of the earth from the sun the pressure exerted by sunlight is avout 10^-5 Pa How much force does this pressure exerted on 10m^2 array of solar cells on a satellite when the array is perpendicular to the direction of the sunlight? If the satellite has a mass of ...
Saturday, January 2, 2010 by Angel

Science
At the distance of the earth from the sun the pressure exerted by sunlight is avout 10^-5 Pa How much force does this pressure exerted on 10m^2 array of solar cells on a satellite when the array is perpendicular to the direction of the sunlight? If the satellite has a mass of ...
Saturday, January 2, 2010 by Angel

physics
Jessica's weight is 540 newtons. According to the Third Law, if the Earth pulls on Jessica with a force of 540 N, then Jessica pulls on the Earth with a force of 540 newtons that acts in the opposite direction. However, if Jessica stumbles while rollerblading, she will fall ...
Friday, January 1, 2010 by Anonymous

Physics
I'm having trouble with this question. Some __ objects emit no visible light but are known through __ and radio images; satellite observations __ Earth's atmosphere help scientist study space at wavelengths that do not reach Earth's surface. If you can answer it, I would ...
Friday, January 1, 2010 by Demi

Science
D. _____ has wavelengths between 0.7 and 0.4 millionths of a meter. D1. What you see as different colors are electromagnetic waves of different ______. D2. Red ligh has the _____ wavelengths (lowest frequency); blue light has the _____ wavelengths (highest frequency). E. ...
Friday, January 1, 2010 by Dillon

Technology
I need help with these two questions: 1. Sheet metal and copper piping are examples of a. natural resources b. industrial products c. consumer products d. standard materials I think it's either B or D 2. Which of the following would be considered part of a primary processing ...
Thursday, December 31, 2009 by y912f

earth Science
When a river is lengthened due to forward erosion, a _____ has occurred.
Friday, December 25, 2009 by brian

physics
The Moon's mass is 7.34 x 10^22 kg, and it is 3.8 x 10^8 away from Earth. Earth's mass if 5.97 x 10^24 kg. a. Calculate the gravitional force of attraction between Earth and the Moon. b. Find Earth's gravitional field at the moon. GIVEN: Moon's mass = 7.34 x 10^22 kg Earth's ...
Thursday, December 24, 2009 by Heart

Physics
1. The problem statement, all variables and given/known data The asteroid Icarus, though only a few hundred meters across, orbits the Sun like the other planents. Its period is about 410 d. What is its mean distance from the Sun? 2. Relevant equations Keplers Law T_1 ^2 / T_2...
Thursday, December 24, 2009 by Rau

Physics
Light from the Sun reaches Earth in 8.3 min. The speed of light is 3.00 x 10^8 m/s. How far is Earth from the Sun? GIVEN: t = 8.3 min V = 3.00 x 10^8 m/s --> Would acceleration be 9.81 m/s^2? Is it this equation d = Vit + 1/2 a t^2
Wednesday, December 23, 2009 by Priscilla

physics
i posted this earlier but am now stuck on getting through the algebra 1. The problem statement, all variables and given/known data 13) (II) At what distance from the Earth will a spacecraft on the way to the Moon experiance zero net force due to these two bodies becasue the ...
Wednesday, December 23, 2009 by Jake

Physics
I'm not sure how to go about solving this problem the algebra gets very messy... At what distance formt he EArth will a spacecraft on the way to the Moon experiance zero net force due to there two bodies because the Earth and Moon pull with equal and opposite force? THANKS
Wednesday, December 23, 2009 by Jake

9th grade
What is a capillary in Earth science terms?
Tuesday, December 22, 2009 by Aby

science
what isthe sun main thing on earth
Tuesday, December 22, 2009 by angelica

Paul
Determien the mass of the Sun using the known value for the period of the Earth and its distance from the Sun. I do not remeber how to do this F = ma = Fg = GmM/r^2 Period of earth 3.16 E 7 s radius earth to moon = 1.5 E 11 m
Tuesday, December 22, 2009 by Physics

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Homework Help: Science