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Homework Help: Science: Earth

Recent Homework Questions About Earth

Physics
determine the point of zero gravitation force, as measured from the centre of earth (mass 5.97 x 10^24 kg) to the sun ( mass 1.99 x 10^30 kg) if the earth-sun distance is 150 x 10^6 km.

science
Just checking my answers.. 1. Which is not a characteristic of the Group 1 alkali metals? A. high densities B. low melting points*** C. found in batteries D. silvery solid 2. Which of the following is true of the Group 2 alkali earth metals? A. They are less dense than the ...

Science
As a raindrop falls from a cloud to the surface of Earth, A.its speed increases due to gravity. B.its speed increases due to air resistance. C.t moves at a constant speed. D.>it moves at a constant velocity I think it is A. Am i right??

languege
in what way are miracles and "in just-" different "Miracles" WHY! who makes much of a miracle? As to me, I know of nothing else but miracles, Whether I walk the streets of Manhattan, Or dart my sight over the roofs of houses toward the sky, Or wade with naked feet along the ...

Biology ASAP
What is the scientific name ( genus and species level) of star fish, jelly fish, silk spider, mouse, and earth worm

Mrs. Sue , Reed! Someone!
the subject is Geologic time. I was wondering if someone could check my answers please Sand or gravel that naturally forms near Earth's surface is known as A. pollen. B. ore. C. aggregate. (D. bedrock.) When new clay sediment is deposited on top of old beach material, it's ...

Science
Sand or gravel that naturally forms near Earth's surface is known as A. pollen. B. ore. C. aggregate. (D. bedrock.) When new clay sediment is deposited on top of old beach material, it's known as A. regression. (B. transgression.) C. progression. D. aggression.

Earth Science
Which of the following climates is most suited for physical weathering? A. Warm B. Dry (C. Hot) D. Cool What latitudes are most likely to see glaciers? (A. 90° N and 90° S) B. 30° N and 30° S C. 45° N and 45° S D. 10° N and 10° S

Earth Science
Which of the following climates is most suited for physical weathering? A. Warm B. Dry (C. Hot) D. Cool What latitudes are most likely to see glaciers? (A. 90° N and 90° S) B. 30° N and 30° S C. 45° N and 45° S D. 10° N and 10° S

Earth Science
What are the two most common minerals located in Earth's crust? (A. Feldspar and quartz) B. Iron and copper C. Diamonds and gold D. Salt and saline Climatology is a subspecialty of A. environmental science. B. oceanography. (C. meteorology.) D. marine biology.

Physics
A tank holds 135 moles of argon gas (atomic mass = 6.633521 × 10^-26 kg) at a pressure of 101300 Pa and a temperature of 302K. Recall that the number of gas molecules is equal to Avagadros number (6.022 × 10^23) times the number of moles of the gas 1) What is the volume of ...

Science
1. Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? (1 point) a solar eclipse a lunar eclipse a total lunar eclipse a penumbra 2. Which of the following statements about a lunar eclipse is true? (1 point) A lunar eclipse can ...

Science
List at least three atmospheric properties that might change as you traveled from the Earth's surface to space. Temperature, gases, air pollutants?

i really need help and i dont ask alot so plzz
I NEED HELP WITH THIS its a TEST: 1. Which of Earth’s spheres contains most of its mass? (1 point) atmosphere hydrosphere geosphere biosphere 2. Erosion and weathering are examples of which types of forces? (1 point) constructive forces destructive forces gravitational ...

World History
Which statement supports the claim that the political philosophy of John Locke was as revolutionary as the scientific revolution of Copernicus? *****a. Just as Copernicus replaced the Earth with the Sun at the center of the solar system, Locke replaced the individual with the ...

Physics help
1. The fundamental force that: (4 marks) ____ 1. causes hair to stand on end after being rubbed by a balloon a) strong nuclear ____ 2. causes protons to remain in the nucleus despite repulsive forces b) weak nuclear ____ 3. controls the planets' orbit around the sun c) ...

science help PLS
An astronomer see a star that is very far away but still very bright. What can she conclude about the star? The star must be very large. The star must be very small. The star must be moving away from Earth. The star must be moving closer to Earth.

Social Studies
In what way is geography an integrative science? a. Geography is an integrative science because it examines Earth in both physical and human terms.*** b. Geography is an integrative science because it borrows from physical sciences such as chemistry, biology, meterology, and ...

Social Studies
What does “geography” mean in literal sense? a. the study of the human elements of Earth b. to describe Earth*** c. the study of the physical elements of Earth d. none of the above

PLEASE CHECK IF THEY ARE CORRECT!!! THANKS
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and ...

Algebra
Your weigh on the moon is about 1/6 of your weigh on earth. Write and solve an equation to show how much a person weighs on earth if he weighs 16 lbs. on the moon .

physics
It has been suggested, and not facetiously, that life might have originated on Mars and been carried to Earth when a meteor hit Mars and blasted pieces of rock (perhaps containing primitive life) free of the surface. Astronomers know that many Martian rocks have come to Earth ...

physics
Mars has a radius of about 0.38 Earth radius and a mass of only 0.11 Earth mass. Estimate the acceleration due to gravity on Mars.'

physics
Mars has a radius of about 0.38 Earth radius and a mass of only 0.11 Earth mass. Estimate the acceleration due to gravity on Mars.

Science
What is the centripetal acceleration a satellite is orbiting the Earth at an altitude of 300.22 km?

geology
list down six techniques used to transfer heat from the earth crust to the surface by fluid circulation

earth science
The global ocean covers about 70% of the Earth’s surface. If all the ocean water was uniformly distributed over the whole surface, what would be its depth? Assume that the Earth is a perfect sphere, and the average ocean depth is 4 km.

engineering
In many engineering uses, the value of �g�, the acceleration due to gravity, is taken as a constant. However, g is actually dependent upon the distance from the center of the Earth. A more accurate expression for g is: g=g0(Re/Re+A)^2 Here, g0 is the ...

physics
Imagine a parallel universe in which the electric force has the same properties as in our universe but there is no gravity. In this parallel universe, the sun carries charge Q, the earth carries charge −Q, and the electric attraction between them keeps the earth in orbit...

Science
An artificial satellite circles around the earth at the height where the gravitational force is one fourth of that at earth's surface. If the earth's radius is R the height of the satellite above the surface of the earth is?

analytic geometry
1. The orbit of the earth is an ellipse with the sun at a focus, the semi-major axes 93 million miles and the eccentricity is 1/60. Find the greatest and least distance of the earth from the sun. 2. A battle shipping is sailing at a straight line towards east at 40km/hour from...

Sociology
For question #3, reference the videos "History of the Most Cajun Place on Earth"and “Music & Culture in the Most Cajun Place on Earth” A) Briefly describe the formation of the Cajun culture as an American subculture in the context of historical events and geographic ...

Physics
On earth, two parts of a space probe weigh 14500 N and 6400 N. These parts are separated by a center-to-center distance of 19 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the other out in space, far ...

English
Crossing the Sea A verdant rain forest rises out of the ocean to snow-capped peaks. Powerful fiords snake their way into glacial valleys. Rivers roar and meadows blossom. Many consider the land of New Zealand to be among the most beautiful places on Earth for centuries that ...

English
Crossing the Sea A verdant rain forest rises out of the ocean to snow-capped peaks. Powerful fiords snake their way into glacial valleys. Rivers roar and meadows blossom. Many consider the land of New Zealand to be among the most beautiful places on Earth for centuries that ...

Physics
an airplane has a velocity of 499 km/h relative to the moving air. at the same time, a wind blows northward with a speed of 87 km/h relative to the earth. the airplane is moving in an easterly direction relative to the earth. find speed of airplane to relative to earth.

Science
Check my answers!! Plz 1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a ...

English
In the movie "Like Stars on Earth," we can see the names 'Nikumbh' and ' Awasthi.' They are main characters in the Indian movie. How do you pronounce the two names? Do you pronounce 'bh' in Nikumbh'?

language arts
Label as Cause & Effect 1. (Effect) When dropped, cats land on their feet. (Cause) Cats are extremely agile creatures 2. (Cause) Few mammals can care for themselves at birth. (Effect) Most mammals are born immature 3. (Effect) The sun has a powerful gravitational force (Cause...

Science Plzz correct me!!!
What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 point) ...

Science
1. What would happen to an object if the force of gravity on Earth was decreased by half? (1 point) Its mass would decrease. Its weight would decrease.* Its density would decrease. Its volume would decrease. 2. Which of the following represents a heterogeneous mixture? (1 ...

science
why does the sun appear to move westward across the sky during the day? a) because earth rotates to the east b) because earth rotates to the west c) because the sun moves in a westerly direction d) because of the way you are looking into the sky

Physics
A 6.80 x 10^4 kg space shuttle moving at 7.90 x 10^4 m/s reenters the earth's atmosphere 80.0 km above the earth's surface. What is the shuttle's total mechanical energy with respect to earth's surface? I know the answer is E= 2.173 x 10^12J But I don't know where this answer ...

Physics
An 1750 kg weather satellite moves in a circular orbit with a gravitational potential energy of 1.69 x 10^10 J. At it's location, free-fall acceleration is only 6.44 m/s^2. How high above Earth's surface is the satellite?

science help PLS
Which of the following correctly describes a way in which Earth’s atmosphere interacts with the hydrosphere? Living organisms breathe gases in the atmosphere. Water moves between Earth’s surface and the atmosphere. Gases in the atmosphere trap incoming solar radiation. ...

World History
How is Egypt and Ancient China different based on Religion and Philosophy (EXAMPLES: religious beliefs and practices, ideas regarding humans, life on earth and/or the after life) They are alike in many ways (polytheistic religion, Both believe there is life after death) but I ...

physics
Estimate the average speed of the apollo spacecaft in m/s, given that the craft took five days to reach the moon from eaeth .the moon is 3.8*10 to the power 8m from earth.

Physics
An airplane has a velocity of 580 km/h relative to the moving air. At the same time, a wind blows northward with a speed of 92 km/h relative to earth. The airplane is moving in an easterly direction relative to earth. Find the speed of the airplane to relative to earth (answer...

Classical Mechanics
Approximate Lake superior by a circle of radius 162 km at a latitude of 47 degrees .Assume the water is at rest with respect to earth and find the depth that the center is depressed with respect to the shore due to the centrifugal force.

Pre-Calculus
Two cities are due north of each other. One city has a latitude of 32¢ª45'12" and the second city has a latitude of 51¢ª12'45". Assuming that the earth is a sphere with a radius of 4000 miles, how far apart are the two cities?

science
A spaceship of mass 2000kg is moving towards planet Earth. Calculate the magnitude of the force that the earth exerts on the spaceship when the spaceship is 100km above the surface of the Earth. The Earth has a mass of 6*10 to the power of 24 kg and a radius of 6,4*10 to the ...

math
A trench 4 meter long ,2 meter wide and 3 meter high was dug into the ground.find the volume of the earth dug out for making this trench.

science
Large craters are visible on the moon but not common on the earth's surface. Which of the following is the beady explanation of why large craters are not evident in the earth's surface in photos taken from space. A.three quarters of the earth's surface is covered by land. B....

Astronomy
"If the Sun were magically replaced with a giant rock that had precisely the same mass, Earth’s orbit would not change. Explain why not." I'm a little confused as to how to answer this. Is it because Earth doesn't orbit the exact center of the sun. Instead, both Earth and ...

physics
A body has mass 400kg on earth. What will be it mass on the moon if the Acceleration due to gravity is 9.8m/s2?

Science
A space probe on the surface of Mars sends a radio signal back to earth a distance of 8.66x0^7 km. Radio waves travel at the speed of light (3:00x10^8 m/s . How many seconds does it take the signal to reach earth

physics
A baseball pitcher throws a baseball with a speed of 48 m/s . In throwing the baseball, the pitcher accelerates it through a displacement of about 3.5 m, from behind the body to the point where it is released how long was it in the air before returning to earth?

Science
A space probe on the surface of Mars sends a radio signal back to earth a t a distance of 8.66 x10*7 radio waves travel at a speed of light 3.00 x 10^8 . How many seconds does it take for it to reach earth

Chemistry 101
The distance from the Earth to the sun is approximately 9.37 x 10^7 miles. How long does it take for light from the sun, to reach the earth? Speed of light is 3.00 x 10^8 m/s. Use dimensional analysis to solve.

science
find the gravitational force exerted by the sun on a 70 kg man located at the earth's equator a)at noon when the man is closest to the sun. b)at midnight when he is futherst from the sun. c)calculate the diferrence in gravitational acceleration due to the sun between noon (a) ...

SCIENCE ASAP HELP PLEASE
which of the following features make earth and venus similar to each other ? A . their size and mass b. their rates of rotation c. their atmospheres d. their directions of rotation****

English
The extreme poverty of Dakar, Senegal, in “Hip-Hop Planet” is best reflected in which image? a. “When I looked into his eyes, they were bottomless oceans.” b. “. . . it pulled me to the earth like a hundred-pound ring in my nose.” c. “. . . they take every bit of...

English
The extreme poverty of Dakar, Senegal, in “Hip-Hop Planet” is best reflected in which image? a. “When I looked into his eyes, they were bottomless oceans.” b. “. . . it pulled me to the earth like a hundred-pound ring in my nose.” c. “. . . they take every bit of...

Geography
List 10 countries wich pacfic ring of earth is found.

physics
A person is standing at the edge of the water and looking out at the ocean (see figure). The height of the person's eyes above the water is h = 1.9 m, and the radius of the Earth is R = 6.38 x 106 m. (a) How far is it to the horizon? In other words, what is the distance d from...

Chemistry 101
The distance from the Earth to the sun is approximately 9.37 x 10^7 miles. How long does ti take for light from the sun to reach the earth? Speed of light is 3.00 x 10^8 m/s. Show work.

Chemistry
The petrol, can be represented by the formula of the octane rating, has earth specifies 704 g/L. Estimate the enthalpy variation when burning 28.5 liters of petrol, assuming energies of connection 0 = 0 (117 kcal) C = 0 (173 kcal) 0–H (111 kcal) C–C (83 kcal) C–H (99 kcal).

Math
a satellite traveling in a circular orbit 2000 kilometers above the earth completes one orbit every 3 hours. assume the earth is a sphere and its radius is 6400 kilometers. find the angular velocity of the satellite

Physics (Feilds)
Show that the gravitational potential at the surface of the Earth is -64 MJ kg-1, given the surface gravitational feild strength is 9.8 N kg-1 and the mean radius of the Earth is 6400 km.

Math
a satellite traveling in a circular orbit 2000 kilometers above the earth completes one orbit every 3 hours. assume the earth is a sphere and its radius is 6400 kilometers. find the angular velocity of the satellite

Physics
The mass of a star in a galaxy far, far away, is 2.13 × 105 Earth masses, and the mean distance from the center of this star to the center of a planet with the same mass as our Earth is 7.87 × 108 km. Treating this planet and star as particles, with each mass concentrated at...

Mechanics
A 500kg spaceship is in a circular orbit of radius 2Re above the earth a.how much energy is required to transfer the spaceship to a circular orbit of radius 4Re. b.discuss the change in potential energy,kinetic energy and the total energy of the system

Physics
How does the weight of a body varies on earth surface?

earth science
During the early Paleozoic era, South America, Africa, Australia, Antarctica, India, and perhaps China comprised the vast southern continent of _____. (1 point) Europe Gondwana Laurasia Pangaea

SCIENCE HELP PLS
The density of gas particles in a section of Earth’s atmosphere decreases. Which of the following is the most likely explanation for this event? The air pressure in that section of Earth’s atmosphere decreased. The air pressure in that section of Earth’s atmosphere ...

English
And yet the books will be there on the shelves, separate beings, That appeared once, still wet As shining chestnuts under a tree in autumn, And, touched, coddled, began to live In spite of fires on the horizon, castles blown up, Tribes on the march, planets in motion. “We ...

Physics
The Earth exerts an 640 N gravitational force on a man. What force does the man exert on the Earth? Answer in units of N.

science help
An astronomer sees two stars in the sky. Both stars are equally far from Earth, but the first star is brighter than the second star. Which of the following is a valid conclusion about the first star? It is larger than the second star. It is smaller than the second star. It is ...

English
1.) "Good fences make good neighbours." Spring is the mischief in me, and I wonder If I could put a notion in his head: "Why do they make good neighbours? Isn't it Where there are cows? But here there are no cows. Before I built a wall I'd ask to know What I was walling in or...

Language
People have been making maps for hundreds of years. Christopher Columbus used maps when he sailed to the "New World." At that time, most people thought Earth was flat, and all of the maps they used were flat, too. Of course, Columbus's maps were not accurate, but would you be ...

Math
Earth weight is 5.9736 x 10^24 Kg and Venus is 4.8685 x 10^24 Kg. What is the combined weight of Earth and Venus ? a)10.8421 X 10^26 Kg b)10.8421 x 10^23 Kg c)10.8421 x 10^25 Kg d)1.08421 x 10^25 Kg

Social Studies
Experts argue that a significant water shortage by 2025 will be caused by a. rising ocean levels. b. drastic increase in water usage by humans.*** c. drastic increase in usage by a growing animal population. d. raging, out-of-control wildfires that are spreading throughout ...

physics
An object in space is initially stationary relative to the Earth. Then, a force begins acting on the object, starting with a force of 0 N, and increasing at a uniform rate until the magnitude of the force is 58 N after the force has acted for 25 s. The body has a mass of 10 kg...

Physics
if mars orbits the sun at an angular velocity of 1.06x10-7 rad/s, how long is a year on mars in earth days assuming it travels in a circular orbit?pls explain

Math
Mercury's average distance from the sun is 57,910,000 km. The Earth is approximately 93,000,000 miles from the sun What would be the distance of a trip from Mercury to Earth, via the Sun. Look out for the units!!! (1 km =(0.62mi) Use Scientific Notation to solve this question.

Math
The speed of light is 3¡Á¡¼10¡½^8 meters/second. It takes 5¡Á¡¼10¡½^2seconds for light to travel from the sun to the earth. What is the distance in meters between the sun and the earth? Express your answer in scientific notation.

mechanics
please help solve these questions (1a). The gravitational field strength g on the earth’s surface is 9.8N/kg. explain what this means.(b) Using the law of gravity, show that gr2= k. Where g=gravitational field strength at a distance r from the center of the earth (r>Re), ...

mechanics
please help solve these questions (1a). The gravitational field strength g on the earth’s surface is 9.8N/kg. explain what this means.(b) Using the law of gravity, show that gr2= k. Where g=gravitational field strength at a distance r from the center of the earth (r>Re), ...

mechanics
please help solve these questions (1a). The gravitational field strength g on the earth’s surface is 9.8N/kg. explain what this means.(b) Using the law of gravity, show that gr2= k. Where g=gravitational field strength at a distance r from the center of the earth (r>Re), ...

physics
(1a). The gravitational field strength g on the earth’s surface is 9.8N/kg. explain what this means.(b) Using the law of gravity, show that gr2= k. Where g=gravitational field strength at a distance r from the center of the earth (r>Re), where Re is the radius of the ...

physics
(1a). The gravitational field strength g on the earth’s surface is 9.8N/kg. explain what this means.(b) Using the law of gravity, show that gr2= k. Where g=gravitational field strength at a distance r from the center of the earth (r>Re), where Re is the radius of the ...

physics
(2). Determine the velocity which a body released at a distance r from the center of the earth when it strikes the earth surface.

Science
Give two reasons why so little is known about organisms from the Precambrian time, even though it was the longest period and early earth's history?

maths
distance around the earth is 4.5x10 ^4 km. whats that in metres?

maths
If the speed of light is 3x10^8m/s and the distance around the earth is 4.5x10^4 km and a plane could travel at half a speed of light, how long would it take for the plane to fly around the earth twice?

Word problem
earth and cement block filling a box weighs 390mlb.the block weigh 2.4times as much as water and earth weighs 1.5times as much as water.water filling the box weighs 2000lb.find the weigh of the cement block.bl? plz help help help!!!! Show work

physics
It has been suggested that rotating cylinders about 12.5 mi long and 4.88 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? Answer...

Science "check my "answers"
1. Which of the following statements best defines tides? (1 point) when waves get bigger because of an approaching storm the rise and fall of ocean water that occurs about every 12.5 hours the rise of ocean water that occurs 12 times a day a giant wave that can be extremely ...

Science
1.Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? -a solar eclipse -a lunar eclipse -a total lunar eclipse -a penumbra 2.Which of the following statements about a lunar eclipse is true? -A lunar eclipse can occur when the ...

mechanics
please help solve these questions (1a). The gravitational field strength g on the earth’s surface is 9.8N/kg. explain what this means.(b) Using the law of gravity, show that gr2= k. Where g=gravitational field strength at a distance r from the center of the earth (r>Re), ...

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Homework Help: Science

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