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Homework Help: Science: Earth
Recent Homework Questions About Earth
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Environmental Science
53. In two or three well-developed paragraphs, describe the current causes of an increased temperature on Earth. Describe what a warmer Earth would be like, including what effect it would have on the world around us. There are a few current causes that can increase the tempera...
Environmental Science
33. A true statement about greenhouse gases is that they a. convert sunlight into heat energy that warms Earth b. are concentrated in the stratosphere c. trap heat that is radiated upward form Earth d. are not affected by human activity For a long time I was stuck between A an...
Science
1. Temperature cools about 6.5 degrees Celsius per kilometer of _______. 2. ___________ from 10 km to 50 km about Earth, this layer contains ozone that absorbs much of the Sun's ultraviolet radiation. It contains most clouds and ____________. 3. _______ layers include the ...
Environmental Science
Research Paper I need to write a research paper on coral reefs. i need to compose a research paper that deals with coral reefs and addresses enough of the questions below in order to meet the minimum page requirements for the paper (3-4 double spaced pages) Explain what a cora...
Exploring Space
what wud hold the cable of a space elevator up? Would it be earth's gravity holding the cable of a space elevator up?
Exploring Space
Why do astronauts appear to float when they aboard the ISS station and experience 90% of earth's gravitational pull? Is it because of the freefall?
Exploring Space
if a satellite were to be launched with too little speed or too much speed then what would happen? If a sattellite were to be launched with too much speed then the friction in the air would make it heat up to the point where it would burn up. Earth's gravity wouldn't b...
physics
A space station is shaped like a ring and rotates to simulate gravity. If the radius of the space station is 150 m, at what frequency must it rotate so that it simulates Earth's gravity? [Hint: The apparent weight of the astronauts must be the same as their weight on Earth...
Physics
A satellite of mass 220 kg is launched from a site on Earth's equator into an orbit at 200 km above the surface of Earth. (a) Assuming a circular orbit, what is the orbital period of this satellite? 5310 s (b) What is the satellite's speed in its orbit? 7790m/s (c) Wha...
Chemistry
A gas-filled balloon having a volume of 3.50 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are −23°C and 3.00 10−3 atm, respectively. Calculate the final volume of t...
science
The earth exerts a force of 2200N on an orbiting communications satellite that is 35mi above the earth..What is the magnitude of the force the satellite will exert on the earth??
Physics
what is the weight of a 10kg object on the moon if it is 1/6 that of the earth?
Incorrect comma usage?-
This begins with the titan Cronos’ mother, Earth, who encourages her children to overthrow their father, Heaven, because out of dislike, he keeps them locked away. does this look right?
physics
A helium balloon and its gondola, of mass M, are in the air and stationary with respect to the ground. A passenger, of mass m, then climbs out and slides down a rope with speed v, measured with respect to the balloon. With what speed (relative to Earth) does the balloon then m...
classroom instruction
Teachers do need to establish ground rules about discussion: students should learn to listen politely to each other, and to agree to differ on occasion. Teachers can model calm and polite behavior, without giving in to irrationality. It is important to make clear to children t...
physics
The MASS OF A SATELLITE IS 2000Kg .DETERMINE THE WEIGHT OF OF THE THE SATELLITE WHEN IT IS (i)resting on the earth (ii) 1000km above earth surface
Physics
How far from the center of the earth must a person be located in space so t hat his/her weight would be the same as when he/she is standing on the moon?
Earth Science
Judging from the sizes of the before-and-after craters atop Mount St. Helens (Figs. 4.8 and 4.9 of the Lab book), which volcanic event appears to have been the more explosive, the last one before 1980, or that which occurred in 1980
English
Can you check these sentences for me, please? Thank you very much in advance. 1) Beowulf and the Dragon wrestle amid sheets of fire. As the flames billow, Beowulf's companions rush away in terror. 2) Only one, Wiglaf, feels enough loyalty to come to the aid of his king. 3)...
sicence
Select all of the answers that apply. A map _____. 1)is a representation of the earth's surface 2)is a portable document describing an area 3)can provide data such as migration trends, directions, and rock composition 4)provides all of the information about a location
physics
How do I go about in solving this? A spy satellite is in circular orbit around Earth. It makes one revolution in 6.01 hours. (a) How high above Earth's surface is the satellite? ___ km (b) What is the satellite's acceleration? ___m/s2
science
you have a picture of a mouce on the west window where would the shadow be in an hours time and what would course it to be there ie the earths spin axis the sun
Physical Science
A rocket moves through outer space at 11,000 m/s. At this rate, how much time would be required to travel the distance from Earth to the Moon, which is 380,000 km?
Physical Science
How much would 80.0 kg person weight (a) on Mars, where the acceleration of gravity is 3.93 m/s2, and (b) on Earth's Moon, where the acceleration of gravity is 4.63 m/s2?
algebra
The weight of an object follows the equation w=Cr^-2, where C is the constant and r is the distance the object is from the center of the earth. a. solve the equation for r. b. Suppose the object is 100 pounds when at sea level. Find the value of C that makes the equation true....
Physics
A space station is shaped like a ring and rotates to simulate gravity. If the radius of the space station is 120 m, at what frequency must it rotate so that it simulates Earth's gravity? [Hint: The apparent weight of the astronauts must be the same as their weight on Earth.]
Physics
Calculate the magnitude of the linear momentum for the following cases. the Earth (mass = 5.98*1024 kg) moving with an orbital speed equal to 2.98*10^4 m/s. so i did 5.98*10^24 times 2.98*10^4=1.78204 × 10^29 But homework website doesn't accept this answer...is there...
CHEMISTRY
The atmosphere contains about 6.8×1013 moles of ozone. If this amount of ozone gas is compressed into a thin layer around the globe (the radius of Earth is 6370 km) at STP (Standard Temperature (0°C) and Pressure (1.0 atm.)), how thick will the layer be in millimeter...
Environmental Science
#36. In two or three well-developed paragraphs, explain how fossil fuels form and how they are used. Here's what I got: Fossil fuels are not distributed evenly around the world, which is why there is an abundance of oil in Texas and Alaska but very little in Maine. Coal fo...
Physics
A particle of mass m is shot with an initial velocity vector v i and makes an angle θ with the horizontal, as shown below. The particle moves in the gravitational field of the Earth. (makes a shape of a parabola)Find the angular momentum of the particle about the origin w...
Universe and Stars
As u look at the stars that re beyond and farther away, what occurs to the angle measured at earth? at what point will this method no longer work? Someone please help explain
earth
if the illustration is the effect of freezing water on rock what term best decribe the process?
Physics
What is the apparent weight of a 75 KG astronaut 4200 km from the center of the earth's moon in a space vehicle.a) moving at constant velocity, and b) accelerating toward the moon at 209 m/s? state the direction in eachcase
science
my first is VAN but not in PAN,my second is EARTH and also in HEAVEN,my third is ONE and not in two,my fourh is in BUN and also in FUN,my last is in STAR but not in RADAR,i am a planet that moves round the sun.name the planet.
Physics
A melon of weight 12 N (near the surface of Earth) is moved through a displacement of magnitude 1.00 m. What happens to the gravitational potential energy (of the melon/Earth system) due to this displacement.
Physics
A spy satellite is in circular orbit around Earth. It makes one revolution in 6.04 hours. (a) How high above Earth's surface is the satellite? (b) What is the satellite's acceleration?
Physics
What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)
College Physics
Gravity on the surface of the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 14 kg object on the Earth? The acceleration of gravity is 10m/s2 . Answer in units of N.
College Chemistry
I am trying to figure out how many minutes are required for sunlight to travel from the Sun to Earth? Assuming the sun is 93,000,000 miles from Earth and that sunlight travels at 1.86x10 to the 5th power miles per second. These things are so tricky, i know i have to convert se...
Earth and space science
what features are associated with subduction zones?
science
Are there any questions on earth that haven't been answered or are to compicated for scientists to get to or understand?
Environmental Science
True or False: 28. Hydroelectric energy is produced by flowing water turning a turbine which generates electricity. TRUE 32. Geothermal energy is generated when heated water or steam is pumped up from inside the Earth to power a turbine that generates electricity. TRUE Am I co...
chemistry 106
A gas-filled balloon having a volume of 1.50 L at 1.2 atm and 25°C is allowed to rise to the stratosphere (about 30 km above the surface of Earth), where the temperature and pressure are -23°C and 3.00 multiplied by 10-3 atm, respectively. Calculate the final volume of...
Science(Urgent)
1) How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake. I know that each unit of Richter magnitude equates to roughly a 32-fold energy increase and that the amplitude has a tenfold increase but I am still confused on how to get the e...
Science
1) How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake. I know that each unit of Richter magnitude equates to roughly a 32-fold energy increase and that the amplitude has a tenfold increase but I am still confused on how to get the en...
Earth Science(Please help)
1) How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake. I know that each unit of Richter magnitude equates to roughly a 32-fold energy increase and that the amplitude has a tenfold increase but I am still confused on how to get the en...
Earth Science(Please help)
How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake? I know that a tenfold increase in wave amplitude equals an increase of 1 on the scale so 1 to 2 = 10times so does that mean that 2 to 3 would be 10 more times?
Earth Science
How much more energy is released in a 5.0 magnitude earthquake than a 4.0 magnitude earthquake? I know that a tenfold increase in wave amplitude equals an increase of 1 on the scale so 1 to 2 = 10times so does that mean that 2 to 3 would be 10 more times?
Earth Science
Around what tectonic plate are most of the worlds volcanoes located. The Pacific plate. Is this correct?
Earth Science(Please check)
Around what tectonic plate are most of the worlds volcanoes located. The Pacific plate. Is this correct?
physics
A 4.9 g marble is fired vertically upward using a spring gun. The spring must be compressed 8.0 cm if the marble is to just reach a target 29 m above the marble's position on the compressed spring. (a) What is the change in the gravitational potential energy of the marble-...
Physics
If two identical bowling balls are raised to the same height, one on Earth, the other on Mars, which has the larger gravitational potential energy increase? A)The bowling ball on Mars will have the larger gravitational potential energy. B)Both balls will have the same gravitat...
Geography
Can someone please check my work? 1. Name the South American countries through which the Tropic of Capricorn passes. Paraguay, chile, Argentina, Brazil 2. Classify each of the following as high, mid, or low latitude. Europe: high South America: low Antarctica: high United Stat...
Science
Here is a question on my science worksheet, "if a projectile's fall matches Earth's 'BLANK', the projectile will not hit earth." i need help figuring out what would go in the blank!
ALGEBRA
Suppose it takes 3 days for a space vehicle to travel from the Earth to the moon. About how long would it take the same vehicle traveling a the same speed to reach Neptune?
Environmental Science
#54. In two or three well-developed paragraphs, define and list two characteristics of each of the following: coastal wetlands, coral reefs, and oceans. I'm not sure what it means by defining and listing two characteristics. here's my answer: Coastal wetlands are coast...
physics
At a certain location on the Earth, the horizontal component of the Earth’s magnetic field is 2.5 ·10−5 T due North. A proton moves eastward with just the right speed for the magnetic force on it to balance its weight so the net force on the proton will be ze...
biology
What is the source of energy driving the hydrolic cycle? a. evaporation of the ocean water b. heat conducted from the earth's core to the surface c. radiant heat from the sun d. air currents returning to the earth's surface
earths core
what are a few (1 or two) reasons why the core cant be of lonestones?
Earth Science
If the continental crust were thinner than its average thickness of 40 km, would it depress the mantle more or less than it does now? Explain.
physics
1.The earth is constantly bombarded by cosmic rays, which are charged particles from outer space. moving vertically Find the force on one such cosmic ray− a proton that is instantaneously downward at 5.04 107 m/s at a point outside the atmosphere over New York, where the...
earth
the area around the great lakes was once covered by thick sheets of ice. Use the principal of isostasy to explain how the melting of these ice sheets has effected the land around the lakes?
earth
Could you tell a story of the rock cycle using a rock called Roger the Rock??
physics
What is responsible for earth's elliptical orbit around the sun? a. the gravitational pull of the sun b. magnetic forces both attracting and repelling other planetary bodies c. momentum caused by the earth's rotation d. balance between centripetal and centifugal forces
Physics
How far above the surface of the Earth does an object have to be in order for it to have the same weight as it would have on the surface of the Moon? (Ignore any effects from the Earth's gravity for the object on the Moon's surface or from the Moon's gravity for th...
Science
with 1*10 to the power of 22 stars in the sky. List several factors that limit us to being able to see only about 2000 to 3000. *shape of the galaxy *size of the galaxy *The sun's light *light reflection from earth *light pollution *lackness of darkness *horizon view Are t...
Science
I know what a baseline is, but what baseline is used in astronomy? y do we need vary the length of baselines we use? Is the baseline the diameter of the earth's orbit? I really do not get the 2nd part.
Science
with 1*10 to the power of 22 stars in the sky. List several factors that limit us to being able to see only about 2000 to 3000. *shape of the galaxy *size of the galaxy *The sun's light *light reflection from earth *light pollution *lackness of darkness *horizon view Are t...
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 1/45 of its value at the Earth's surface?
Science
with 1*10 to the power of 22 stars in the sky. I can't put 22 in small form above 10, so that's why I'm wording it by saying to the power. So: with 1*10 to the power of 22 stars in the sky. List several factors that limit us to being able to see only about 2000 to ...
college physics
The space shuttle releases a satellite into a circular orbit 550 km above the Earth. How fast must the shuttle be moving (relative to Earth) when the release occurs?
colllege 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 1/45 of its value at the Earth's surface?
college
Calculate the force of Earth's gravity on a spacecraft 12,800 km (2 Earth radii) above the Earth's surface if its mass is 1550 kg.
Science
Hello, could someone help me with this question please? Explain how burning wood or coal to heat your house may contribute to global warming by altering the energy balance at the Earth's surface? Thank you
science
Why was the discovery of microspheres and coacervates an important contribution to the understanding of how life might have originated on Earth?
3rd grade - Solor System
Two Questions: If it takes Jupiter 9.9 hours to make one rotation around the earth. This means that one day on Jupiter is actually how long? This is as many as how many Earth days?
3rd grade - Solor System
How many years does it take Jupiter to orbit the sun? One year on the this planet would actually be how many earth years long?
science
if something big from outerspace hit earth, then where would it have least human impact?
Planet Juniper
It takes Juniper _____ to make one rotation. This means that one day on Juniper is actually ____ long. That is as many as _____ Earth days!..answer this questions...thanks
Earth science project
How do lost pet/pet ads predict earthquakes, procedure to do the project ?
physics
What is the weight of a 0.2kg toy on or near the surface of the Earth? (g = 9.8m/s2? in newton
physics
What is the weight of a 0.2kg toy on or near the surface of the Earth? (g = 9.8m/s2? in newton
physics
A bike is hanging from a hook in a garage. Consider the following forces. (a) The force of the Earth pulling down on the bike. (b) The force of the bike pulling up on the Earth. (c) The force of the hook pulling up on the bike. (d) The force of the hook pulling down on the cei...
Physics
A comet with a mass of 7.95 1011 kg strikes Earth at a speed of 22 km/s. (a) Find the kinetic energy of the comet in joules. ____ J (b) Compare the work that is done by Earth in stopping the comet to the 4.2 1015 J of energy that was released by the largest nuclear weapon ever...
the outer planets
I am working on a crossword that asks what is 4 times the diameter of Earth. Can you help with this?
science on weather
how would earth be affected if its axis were not titled?
Earth Science
Upon what measurement is the Earth's latitude and longitude system based?
chemistry
even every air can be changed in to liquid at certain pressure and temperature, why our earth tend to change water at gaseous state to liquid state and by what conditions?
physics
A bag of sugar weighs 6.00 lb on Earth. What would it weigh in newtons on the Moon, where the free-fall acceleration is one-sixth that on Earth?
math
People weigh 6 times as much on Earth as they do on the moon.Mr.Marks weighs 180 pounds on Earth.How much would he weigh on the moon?
*Science*
Are meteroties large lumps of trapped rock/metal which actually reach the earth's surface?
Scientific studies
A helicopter is ascending vertically with a speed of 5.20m/s. At a height of 125 m above the Earth, a package is dropped from a window. How much time does it take fo the package to reach the ground? [Hint: The package's initial speed equals the helicopter's}
Biology
29. CFCs are a problem because they a. have been released in large quantities in the past b. break down to reactive free chlorine atoms c. attack ozone molecules in the upper atmosphere d. all of the above D? 10. Ozone depletion in the atmosphere a. leads to the formation of a...
English
Can you check these sentences for me, please? 1)He is a superstar now and he is slamming (a synonym?) on his guitar. 2)He is responsible for the building (?) of Westminster Abbey. 3)He withdrew from Britain to defend Rome against (or from?) a Barbarian attack. 4)According to t...
Geography
(continued from yesterday) Eastern Europe. Where on Earth? Sept. 18: Traveled south and arrived today in the town associated closely with Hans Christian Andersen. Weather here a bit rainy, but we're having too much fun to care! (Odense, Denmark?)
Physics
A bike is hanging from a hook in a garage. You need to consider the following forces. (a) The force of the Earth pulling down on the bike. (b) The force of the bike pulling up on the Earth. (c) The force of the hook pulling up on the bike. (d) The force of the hook pulling dow...
Science-Help
How is a meteor and astroid similar? Meteors and asteroids are both rocks from space that sometimes hit the earth. They may be made from ice. How are they different? Meteors are known as shooting stars. They move very fast across the sky. Asteroids are found in the asteroid be...
Chemistry
It is estimated that uranium is relatively common in the earth’s crust, occurring in amounts of 4 g/metric ton. A metric ton is 1000 kg. At this concentration, what mass of uranium is present in 1.0 mg of the earth’s crust?
Geography
Where on Earth? Postcards form Europe Your neighbors, the Wiltons, have gone away on vacation to Europe. Before they left, Mrs. Wilton told all fo the neighbors, "We'll be sending lots of postcards. Try to figure out where each card came form. If you do, we'll thr...
Physics
A bike is hanging from a hook in a garage. You need to consider the following forces. (a) The force of the Earth pulling down on the bike. (b) The force of the bike pulling up on the Earth. (c) The force of the hook pulling up on the bike. (d) The force of the hook pulling dow...
Physics
On a clear day, the Earth’s atmospheric electric field near the ground has a magnitude of 100 N/C and points vertically down. Inside the ground, the electric field is zero, since the ground is a conductor. Consider a mathematical box of 1.0 m x 1.0 m x 1.0 m, half below t...
Science
What are neap tides, and why do they occur? Neap tides are the weaker tides. They occur when the sun and the moon are perpendicular to each other with respect to earth. Please correct me if I'm wrong, thanks
Science
what are spring tides and how do they occur? Spring tides are are very high tides which occur when the sun, moon, and earth form a straight line. Please correct me if I'm wrong, thanks :-)
Science
What are tides and how are they caused? Tides are the alternate rises and falls of large bodies of water. They are caused by the gravitational interaction between the Earth and the Moon. Please correct me if I'm wrong, thanks
Science
Are the phases of the moon caused by Earth's shadow cast on the moon? No, the phases of the moon are caused by the alignment of the moon and sunin the sky. Please correct me if I'm wrong, thanks
Science
Why is only one side of the moon visible from the earth at all times? Only one side of the moon is visible from the earth at all times because the other side is illuminated by the sun, which doesn't face us. Please correct me if I'm wrong, thanks :-)
college
The earth exerts a force of 2500 N on an or- biting communications satellite that is 30 mi above the Earth. What is the magnitude of the force the satellite will exert on the earth? Answer in units of N.
chemistry
1. Which of the following statements about the cell theory is correct? a) All living organisms are made up of one or more cells. b) All cells arise from other, pre-existing cells c) All eukaryotic cells contain symbiotic prokaryotes. d) All prokaryotic cells contain symbiotic ...
GEOLOGY
WHAT NATURAL GEOLOGIC EVENT (EARTHQUAKE, VOLCANO, ETC) CREATED GRANITE?? I CANNOT FIND ANY INFO ON IT.
science
At what height above the earth is the acceleration due to gravity 12% of its value at the surface?
Science
The cause of the seasons on Earth is often mistakenly attributed to the elliptical orbit of Earth around the sun. What is the actual cause of the seasons? Tha actual cause of the seasons is because of the tilt of Earth's axis. please correct me if i'm wrong, thanks :-)
Science
I want to see earth in satellite image. I know about google and wikimapia, are there any other sites that have satellite images for you to see for free?
Science
The cause of the seasons on Earth is often mistakenly attributed to the elliptical orbit of Earth around the sun. What is the actual cause of the seasons? Tha actual cause of the seasons is because of the tilt of Earth's axis. please correct me if i'm wrong, thanks :-)
physics
Calculate the kinetic energy that the earth has because of its rotation about its own axis. For comparison, the total energy used in the United States in one year is about 9.33 109 J. cannot_evaluate cannot_evaluate J (b) Calculate the kinetic energy that the earth has because...
Environmental Science
I need a little help on these, i've posted them a few times but i don't get any answers. 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...
Physics
Near the surface of the Earth there is an electric field of about V=150 V/m which points downward. Two identical balls with mass m= 0.550 kg are dropped from a height of 2.30 m, but one of the balls is positively charged with q1= 800 microCoulombs , and the second is negativel...
Physics
Near the surface of the Earth there is an electric field of about V=150 V/m which points downward. Two identical balls with mass m= 0.550 kg are dropped from a height of 2.30 m, but one of the balls is positively charged with q1= 800 microCoulombs , and the second is negativel...
Science -CLIMATE
Explain how different temperatures on earth create winds.
science
In 4th grade science, How could measuring the orbit of a comet help scientists understand when it will next be visible from Earth?
space
how much power would the entire earth radiate if it did not have an atmosphere
provine
How does the tilt of the earth affect climate
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 aw...
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 h...
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...
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 ...
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.
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 aw...
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...
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...
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 tak...
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&...
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 warmi...
earth science
what glaciers no longer exist in alaska?
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.
Biology
Why was the discovery of microspheres and coacervates an important contribution to the understanding of how life might have originated on Earth?
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?
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?
Physics
1.A spherical condenser has inner and outer spheres of radii a and b respectively. The space between the two is filled air. The difference between the capacities of the two condensers formed when outer sphere is earthed and when inner sphere is earthed will be.........? Explai...
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 acti...
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 surfa...
Physics
The intensity of a particular earthquake wave is measured to be 5.0 multiplied by 106 J/m2·s at a distance of 55 km from the source. (a) What was the intensity when it passed a point only 3.0 km from the source? (b) What was the rate energy passed through an area of 7.0...
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...
Earth Science
Tomorrow will be sunny with high clouds. What does this statement describe?
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)
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...
earth science
if you didnt 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?
Earth Science
Which of the following help create volcanoes? plate tectonics landslides cracks in Earth's crust built up magma
social studies
what were the lines of defence dug into the earth? and what was willsons plan for peace?
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 t...
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
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