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March 28, 2017

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Homework Help: Science: Earth

Recent Homework Questions About Earth

Math
Assume the carrying capacity of the earth is 9 billion. Use the 1960s peak annual growth rate of 2.1​% and population of 3 billion to predict the base growth rate and current growth rate with a logistic model. Assume a current population of 6.8 billion. How does the ...
Sunday, March 26, 2017 by Sarah

Science Earths Evolution
Tell me what you think plz 1.The Reason why it was not a solid planet yet is because Rocks or asteroids were still being formed. All there was were Dust and Tiny Particles were forming the asteroids. This was probably in the Hadean Era Because it was long ago, That’s ...
Friday, March 24, 2017 by Side Walks

Science
Which of the following can be used to explain why fossils of the same kinds of organisms can be found in different regions of the world? biogeography adaptation continental drift dispersal** Which piece of children’s’ playground equipment could be used to model and explain...
Friday, March 24, 2017 by Anonymous

Math
The speed of light is 3x10^8 m/s. If the sun is 1.5 x10^11 meters from the earth, how many seconds does it take light to reach the earth?
Wednesday, March 22, 2017 by Emma

Science
Some constellations such as Ursa Minor, are visible in the sky year round other constellations appear for only part of the year.Explain why this happens. The earth moves in its orbit, so the direction facing away from the sun changes during the year. We only see stars in the ...
Tuesday, March 21, 2017 by Stars

physics
Considering the factors that affect gravitational pull, in which location would the gravitational pull from the earth be SMALLEST on you? A) visiting friends at the beach B) visiting Santa on the second floor of the mall C) visiting Uncle Chrissy in the Himalayan Mountains D) ...
Tuesday, March 21, 2017 by Lily

modern physics
Missiles are fired towards the earth from a spacecraft. The missiles are moving with a speed of 0.8c with respect to the spacecraft. If the spacecraft itself has a speed of 0.3c with respect to Earth, how fast are the missiles observed to travel with respect to Earth? What ...
Tuesday, March 21, 2017 by gourav

modern physics
The earth and the sun are 8.3 light-minutes apart in the same inertial frame. Two events occur at t = 0 on the earth and t = 3 minutes on the sun respectively. Calculate the time difference between the events according to an observer moving at u = 0.6c from the earth to the ...
Tuesday, March 21, 2017 by gourav

Science
Mount St. Helens, the Great Lakes, and Death Valley are physical features of the earth. What is the scientific term used to describe these features? A. cartography B. topography C. geology D. contourology
Monday, March 20, 2017 by Solomon

science
Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time period not really considered a part of Earth’s ...
Sunday, March 19, 2017 by bob

modern physics
A star emits light with wavelength 120 nm. An observer on earth measures the wavelength of the light received from the star to be 600 nm. Calculate the speed with which the star is moving.
Sunday, March 19, 2017 by gourav

modern physics
Missiles are fired towards the earth from a spacecraft. The missiles are moving with a speed of 0.8c with respect to the spacecraft. If the spacecraft itself has a speed of 0.3c with respect to Earth, how fast are the missiles observed to travel with respect to Earth? What ...
Sunday, March 19, 2017 by gourav

modern physics
The earth and the sun are 8.3 light-minutes apart in the same inertial frame. Two events occur at t = 0 on the earth and t = 3 minutes on the sun respectively. Calculate the time difference between the events according to an observer moving at u = 0.6c from the earth to the ...
Sunday, March 19, 2017 by gourav

Science
How are earth and Venus similar? How is Venus different from Earth? Provide two similarities and two differences.
Thursday, March 16, 2017 by Justin

Science
What would be the effect on the seasons and the northern and southern hemispheres if Earth were not tilted?
Wednesday, March 15, 2017 by Help I need somebody not just anybody

Biology
the eventual evolution of living organisms on earth is based upon the following theory: during the early stages of the earth's history the chemical characteristics of the world changed as the conditions on the planet changed. The changes established the conditions necessary ...
Wednesday, March 15, 2017 by Samantha

Astronomy
The gravity lock of the Moon to Earth is silimar to the action of a A) giant pendulum B) spinning top C) master key D) tidal wave E) magnetic compass I'm torn between A and E.
Tuesday, March 14, 2017 by Angie

Astronomy
Please help! I'm really behind and need to catch up. 1. The rings orbiting the Jovian planets may have been small ____ that got too close to the planets long ago. A. Comets B. Asteroids C. Moons D. Meteors 2. What is the composition of the rings around the Jovian planets? A. ...
Tuesday, March 14, 2017 by M

physical science
If sam drops a 40 kg mass from a height of 20 meters on earth how much was the potential energy of the mass before he dropped it a-800 j b-784 n-m c-800 n-m d-7840 j e- 200 j
Tuesday, March 14, 2017 by erika

science
If sam drops a 40 kg mass from a height of 20 meters on earth how much was the potential energy of the mass before he dropped it a-800 j b-784 n-m c-800 n-m d-7840 j e- 200 j
Tuesday, March 14, 2017 by erika

Science
The following sphere is responsible for forming the solid shell of Earth that holds up life? -Hydrosphere -Lithosphere -Atmosphere -Biosphere** Explain the interaction between the four main components of Earth's physical systems. Be sure to include the name of each system and ...
Monday, March 13, 2017 by PoPo

SS
how did rachel carson affect the environment? A: she wrote a book that caused congress to ban a pesticide. B: she developed the technology that allow us to recycle. C: she started the celebration of earth day. D: she was the first director of the environmental protection agency
Monday, March 13, 2017 by Jasmine

Science - Plate Tectonics
Where does the source of heat for Earth’s convection currents come from
Sunday, March 12, 2017 by Jasmine

Algebra
Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88 *10^12 miles. Suppose a star is 3.2 * 10^2 light-years from Earth. In scientific notation, approximately how many miles is it? a. 1.88 x ...
Sunday, March 12, 2017 by Evelyn

math
simplify (8*10^7)(7*10^4) i think it's 5.6*10^10 simplify (3*10^6)(8*10^-4) i think it's 2.4*10^3 Astronomers measure large distances in light-years. One light-year 5.88*10^12 mi Star is 9.8*10^1 light years from Earth in scientific notation how many miles I think it's 5.88*10...
Friday, March 10, 2017 by q

english
Which sentence from this excerpt of Jefferson Davis’s Inaugural Address indicates that secession was the Confederacy’s way of reclaiming its legal powers? A. An agricultural people, whose chief interest is the export of a commodity required in every manufacturing country, ...
Thursday, March 9, 2017 by catie

English
What does the word “pentimento” mean, and what is its specific implication in this context? "Now General Eisenhower and I were alone in his studio. What on earth to say—with those five stars in pentimento on his shoulders, me a nineteen-year-old college student. The ...
Thursday, March 9, 2017 by Emma

Science (check my answers)
14. Chemical runoff from fields, oil spills, and erosion is the major source of a. air pollution b. water pollution*** c. hydropower d. renewable energy 15. Which compound causes the depletion of earth's ozone layer? a. ultraviolet radiation*** b. chlorofluorocarbon c. carbon ...
Thursday, March 9, 2017 by EmberShy

Science
Which statement correctly describes the sun and earth? a. the sun and earth both have water. b. the sun and earth both have a surface called the crust. c. the sun and earth both have an atmosphere d. the sun and earth both have breathable air
Thursday, March 9, 2017 by Aisha

world history
Please check my answers. 1. Which of the following separates the Arabian Peninsula from Africa? 1.The Persian Gulf 2.The Red Sea*** 3.the Indian Ocean 4.The Mediterranean Sea 2. Why is food often used as a positive benefit of the Colombian exchange, as described in this lesson...
Wednesday, March 8, 2017 by please check my answers

physics
A star the size of our Sun runs out of nuclear fuel and, without losing mass, collapses to a white dwarf star the size of our Earth. The radius of our Sun is 6.96×108m , the radius of Earth is 6.37×106m If the star initially rotates at the same rate as our Sun, which is once...
Wednesday, March 8, 2017 by clara

Geography
Describe the formation of the earth in refference of Nebular cloud theory
Wednesday, March 8, 2017 by Petrucci

ap physics
Suppose that Superman wants to stop Earth so it does not rotate. He exerts a force on Earth F⃗ SonE at Earth's equator tangent to its surface for a time interval of 1 year. The mass of Earth is 5.98×1024kg, the radius is 6.37×106m. Assume that Earth is a solid sphere with ...
Tuesday, March 7, 2017 by clara

ap physics
A star the size of our Sun runs out of nuclear fuel and, without losing mass, collapses to a white dwarf star the size of our Earth. The radius of our Sun is 6.96×108m , the radius of Earth is 6.37×106m . If the star initially rotates at the same rate as our Sun, which is ...
Tuesday, March 7, 2017 by clara

HELP Voices in Verse Unit Test: Closed Book
"President Lincoln’s Declaration of Emancipation, January 1, 1863" by Frances E. W. Harper 1 It shall flash through coming ages, 2 It shall light the distant years; 3 And eyes now dim with sorrow 4 Shall be brighter through their tears. 5 It shall flush the mountain ranges, ...
Monday, March 6, 2017 by BlackTape

Science
PLEASE CHECK MY ANSWERS :) answers marked below 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...
Monday, March 6, 2017 by Anonymous

Algebra
The mass of Earth is about 3 × 10-3 times the mass of Jupiter. The mass of Earth is about 6 × 10 24 kg. What is the mass of Jupiter? Give your answer in scientific notation.
Monday, March 6, 2017 by Brad

Physics
A 23.7 kg child, with a 4.35 kg backpack on his back, first stands on a sidewalk and then jumps up into the air. Find the net force (positive up/negative down) on Earth due to the child when the child is (c) standing still and (d) in the air.
Sunday, March 5, 2017 by Maria

math
Assuming the earth to be a sphere of radius 6370km if seventy five percent of the earth's surface is covered by water then find how many square kilometres is area of the land
Saturday, March 4, 2017 by shiv Shankar yadav

english
:Select the correct excerpt. Which excerpt from Robert Stawell Ball's Great Astronomers is best supported by this diagram? The diagram show the earth in the middle the sun circling it then the moon circling earth but farther away with mars circling the moon Excerpt 1 These ...
Saturday, March 4, 2017 by marie

Science- Astronomy
How are Earth and Venus different? I already wrote that they have different atmospheres but I need another reason why are different so can someone help me please?
Thursday, March 2, 2017 by Jiskha Student

Science
Why is the weight of an object less on the moon than on Earth?
Tuesday, February 28, 2017 by RD

science
Earth's energy sources include both renewable and nonrenewable resources. name at least three sources of energy that could be used in your house. then describe the ideal energy source for generating most of your home's electricity, and explain why you choose that source
Monday, February 27, 2017 by shadow

Math
There is a population of 6.848 billion people. There are roughly 57.9 million square miles of land on Earth, of which about 22% are favorbale for agriculture. Round answer to the nearest person. There are ___ people/ mile^2 of farmable land. I DIVIDED 6.848BILL / 57.9MILL & ...
Sunday, February 26, 2017 by Julie

biology
would it be easier if someone who doesn't have proprioception to go to space and return back to earth to walk normally or would it be the same?
Sunday, February 26, 2017 by homework

maths
Angle of elevation of sun from earth is called? (A) sunset (b) sun's altitude (c) sunrise (d) none
Saturday, February 25, 2017 by sanjay

science
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 that the group 1 alkali metals b. They have...
Friday, February 24, 2017 by Help me

math
Please check my math answers (and correct?)? I have some math questions, please check them, (they are multi choice, check if my answer is correct. if not, please say which is correct) 1. What is the simplified form of the expression –(10)–1? a -1/10 b -1/-1^10 (my answer) ...
Thursday, February 23, 2017 by weird equestrian

Language Arts
The arrow and the song poem 1 i shot an arrow into the air, 2 it fell to earth, i know not where; 3 for, so swiftly it flew, the sight 4 could not follow in its flight Part A Which form best describes the poem this excerpt is from A. lyric poem B. concrete poem *** C. haiku D...
Thursday, February 23, 2017 by SugarPie

Science- Earth
Under which circumstances do neap tides occur? HELP NEED ASAP!!
Wednesday, February 22, 2017 by kat

Physics
Sputnik, the first artificial satellite to orbit the Earth, had a mass of 83.6kg and travelled at 7574 m/s. The radius of the earth is 6371 km and its mass is 5.972 x 10^24 kg. What gravitational force did Sputnik apply to the earth during this orbit? What I've got so far: so...
Wednesday, February 22, 2017 by Grace

Math - Calculus
Directions (or bearings) on Earth are measured in degrees, running from zero to 360 degrees, clockwise, starting with 0 degrees being due North. So due East for example, is 90 degrees, due South 180 degrees, and Northwest is 315 degrees. You are swinging a rock clockwise (...
Tuesday, February 21, 2017 by Jamie

Science
Ozone is known to cause respiratory problems in humans and to damage plants. However, the ozone layer also protects Earth. Explain the locations ozone can be found, how ozone is helpful, how it is harmful, and what causes the depletion of the ozone layer.
Tuesday, February 21, 2017 by Unknown

physics
A flying-saucer shaped fairground ride is rotating in a horizontal plane. If the rider’s circular path has a radius of 8 m, at how many revolutions per minute the ride should spin in order for the rider to feel a centripetal acceleration of about 1.5 times Earth’s ...
Tuesday, February 21, 2017 by yara

Physics
which of the following is NOT true about the path of a cannon ball launched horizontally from the earth's surface if air resistance is neglected? a. the cannnonball has a uniform horizontal velocity b.the total velocity of the cannon ball increases as a function of time c.the ...
Monday, February 20, 2017 by Anonymous

physics
The Earth is 150 million km from the sun. It completes one orbit in a period of approximately 365.25 days. Calculate the orbital speed of Earth in km/hour. please helpppp
Monday, February 20, 2017 by loral

science
a body is released from the great height and falls freely towards the earth . another body is released from the same height , one second later . then the separation between the two bodies , two seconds after release of the second body is
Sunday, February 19, 2017 by farha

Science
The words to use are: crust, moving, lithosphere, asthenosphere, upper mantle, volcanoes, semisolid The ___1___, which includes the ___2___ and part of the ___3___, is divided into plates that carry all of Earth's lands and oceans. These plates float on a ___4___ layer of rock...
Thursday, February 16, 2017 by Ari

Physics (Magnetism)
In an experiment on the shuttle, an electron with a speed of 6.3 x 105 m/s [N] and a mass of 9.11 x 10-31 kg is shot through an external magnetic field. Determine the strength and orientation of the magnetic field required so that the electron's direction of travel remains ...
Thursday, February 16, 2017 by Kim Tuan

Scienc
2. A 2,500 kg car moves at 15 m/s2; 15 m/s2 is the _________ of the car A. Acceleration B. Force C. Velocity D. Speed** 3. Two people are pushing a couch from opposite sides. One person is pushing to the right with a force of 3 N. The other person is pushing to the left with a...
Thursday, February 16, 2017 by Nicole

Earth Science
Slide 1 This is a cumulus cloud. Can you find four things on the word list that you can use to describe this cloud. Cumulus clouds consists of puffy tops, no rain expected, 3,000 ft. high, and flat bottoms. Slide 2 This is an example of towering cumulus clouds. Write down as ...
Thursday, February 16, 2017 by Sam

Science and Hurry!
What causes land breeze and sea breeze? A) The differential heating of land and sea by the Sun results in the movement of air. B) Hot air from the sea blows over the land because there is a high pressure area over the sea. C) Cold air blows from the land over the sea because ...
Thursday, February 16, 2017 by JT

S S PLEASE HELP PLEASE
Some Polynesian islands are ring-shaped coral islands that surround a body of water, or (1 point) • copra. • coral. • atolls. • plates. 2. In the mid-1800s, what event played a part in the large increase in British immigration to Australia? (1 point) • Aborigines ...
Thursday, February 16, 2017 by foxiecold

Science, please! help!
1. How does sea-floor spreading occur? a.New materials are being added to the atmosphere. b. Earthquakes break apart the ocean floor. c. Sediments accumulate at the area of spreading. d. Molten material beneath Earth's crust rises to the surface. 2. Which feature form the ...
Wednesday, February 15, 2017 by Vanessa P.

Physics
Hi, I'm stuck with the following question: The acceleration due to gravity on Mars is only 3.75m/s^2. You would like to modify an antique grandfather clock so that it would still keep accurate time on Mars. If the length of the pendulum on Earth is l, what should the length of...
Tuesday, February 14, 2017 by Grace

physics
calculate angular momentum and rotational kinetic energy of earth about its own axis
Monday, February 13, 2017 by Anonymous

physics
A ball is let fall from a hight h0.There are n collisions with the earth . If the velocity of rebound after n collisions is vn and the ball rises to a hight hn , then coefficient of restitution e is given by ,
Sunday, February 12, 2017 by dharmapal

algebra
Astronomers measure large distances in light-years. One light-year is the distance that light can travel in one year, or approximately 5.88 *10^12 miles. Suppose a star is 3.2 * 10^2 light-years from Earth. In scientific notation, approximately how many miles is it? 1.88 * 10^...
Friday, February 10, 2017 by Lost

Science
The force of gravity of objects on the moon is approximately one-sixth of their value on Earth. Joe's weight on the moon is 124 N. What will Joe's mass on Earth be?
Friday, February 10, 2017 by Jessica

Science
The force of gravity of objects on the moon is approximately one-sixth of their value on Earth. Joe weighs 7633 N on earth. What will Joe's mass on the moon be?
Friday, February 10, 2017 by Jessica

Science
Which of earth's spheres contains mountains,valley's, and other landscapes?
Thursday, February 9, 2017 by Mike

SCIENCE asap :P
Twice a year on Earth, the number of hours of darkness is equal to the number of hours of sunlight. These events, where both day and night are 12 hours, are the spring and autumn equinoxes.Which of these describes the orientation of the sun and Earth on these two days? A.Earth...
Thursday, February 9, 2017 by coolguy123

Earth Science
1. We start with 400 atoms of Uranium-238. How many remain after 4.5 billion years? _______ After 9 billion years? _______ After 13.5 billion years? ________ 2 . How long will it take for ½ of the original amount of Rubidium-87 to decay? _______ 3. Carbon-14 has a half-life ...
Wednesday, February 8, 2017 by 아, 깹송~

English
A character who is depicted realistically and has his or her own personality and history in a story is what type of character? A. Individuated B. Main == C. Modern D. Representative Which of the following is not considered a level of setting in a story? A. Supernatural B. ...
Tuesday, February 7, 2017 by Anonymous

Science
Physics A scientific instrument weighing 98 pounds on the Earth is transported to another planet whose mass is 1.7 Earth masses and whose radius is 0.7 Earth radii. What does this instrument weigh on this planet? To be graded correctly, enter the new weight in pounds (numbers ...
Monday, February 6, 2017 by Erika

Geometry
A sailboat is heading directly north at a speed of 16 knots (1 knot = 0.514 m/s). The wind is blowing towards the east with a speed of 10.4 knots. (Both velocities are given relative to the Earth.) Determine the magnitude and direction of the wind velocity as measured on the ...
Friday, February 3, 2017 by Ellie

Science
Carrying capacity is the maximum number of ___________ that an ecosystem can support 1.different species 2.individuals in a population**** 3.habitats 4.limiting factors In an island ecosystem, a species of beetle feeds on leaves of a shrubby plant. A species of songbird preys ...
Friday, February 3, 2017 by Anonymous

Geologic Time and Earth's History Unit Te
1. An example of a geologic event that could be recorded in rocks is ____. a civil war the occurrence of sun spots a volcanic eruption a lunar eclipse 2. "The present is the key to the past." This statement rephrases the ____. principle of cross­cutting relationships law of ...
Thursday, February 2, 2017 by WhiteRain

physics
what is gravitational field of the earth?
Thursday, February 2, 2017 by kavya

physics
with what velocity must a body be thrown from earth surface so that it may reach a height 4Re the earth surface. given Re=6400km g=9.8m/s
Thursday, February 2, 2017 by kavya

physics
The earth spins on its axis once a day and orbits the sun once a year (365 1/4 days). Determine the average angular velocity (in rad/s) of the earth as it (a) spins on its axis and (b) orbits the sun. In each case, take the positive direction for the angular displacement to be...
Wednesday, February 1, 2017 by Tyler

Science
During a lunar eclipse, does the Moon enter the Earth’s shadow from the east or the west? Explain your answer. Wouldn't it be the east because that's the same way the moon rises normally? So if it normally rises in the east it would do that again.. or would it be west ...
Wednesday, February 1, 2017 by Mykayliah

Literature
which of the following lines from song of becoming best supports the response selected above? A:"Facing sullen tanks with streams of stones. B: Dueling with branches, pretending to be great heroes in history. C: They grown to become trees, plunging deep roots into the earth...
Tuesday, January 31, 2017 by Mills

science
The orbits of planets being elliptical was one the planetary laws developed by ==A. Kepler. B. Brahe. C. Ptolemy. D. Copernicus. If a car travels from Town A to Town B on one road at different speeds and stops at red lights, knowing the distance between the towns and the ...
Tuesday, January 31, 2017 by Check answers please

Math
A variable star is one whose brightness alternately increases and decreases. Lists of variable stars can be found online, and many occur in familiar constellations visible with the naked eye. One such star, R Hydrae, has an average magnitude rating of 7.2 but its magnitude ...
Tuesday, January 31, 2017 by Meenu

math
Describe the points on the earth’s surface that are visible to a viewer who is 100 miles above the North Pole. Would it be half of the surface area of Earth?
Tuesday, January 31, 2017 by Helen

Science
The (blank) has given scientists information about past life on Earth.
Monday, January 30, 2017 by Aaron

Earth Science
What are the maximum and minimum dimensions (the size range) for the following particle sizes? a) cobble: b) pebble: c) sand: PLEASE HELP
Sunday, January 29, 2017 by Maya

Math show work
If a hypothetical planet in our Solar System had a sidereal period of 11.1 Earth years and a circular orbit, how far from the Sun in Astronomical Units would it be? Enter your answer to the nearest 0.01 AU.
Saturday, January 28, 2017 by help

Math
If a hypothetical planet in our Solar System had a sidereal period of 11.1 Earth years and a circular orbit, how far from the Sun in Astronomical Units would it be? Enter your answer to the nearest 0.01 AU.
Saturday, January 28, 2017 by johhny 5

physics
IF a particular galaxys has a total mass of 10 to the 56 grams and the average star in that galaxy has a mass of 10 to the 35 grams, approximately how many stars are there in that galaxy? Give your answer to the nearest whole power of 10 by entering the exponent only. A ...
Saturday, January 28, 2017 by arias

Math
If an object which weighs 100 lbs on the Earth's surface were placed on a planet with 2 times the radius of the Earth and with 7 times the Earth's mass, how much would that object weigh? Enter answer to nearest 0.1 lbs. The term "void ratio" means the ratio of the volume of ...
Saturday, January 28, 2017 by james bond

physics
1.A certain spacecraft is 3.3 AU (Astronomical Units) from Earth. How long in seconds does it take for a signal to reach the Earth after it is transmitted from the spacecraft? Hint: An AU is about 149.9 Million Km, and light moves at 299,800 Km/s. {Indicate your answer to the ...
Saturday, January 28, 2017 by jere

English
What is the meaning behind this quote: you've gotta dance like there's nobody watching love like you'll never be hurt sing like there's nobody listening and live like it's heaven on earth
Tuesday, January 24, 2017 by Andy

Astronomy
1. How did the geocentric model explain the retrograde motion of planets? A. Earth moves faster in its orbit and passes the other planets. B. The planets move backward when they get too close to earth. C. The planets travel in circles as they move around earth in a circle. D. ...
Monday, January 23, 2017 by M

Physics
Many astronomers argue that the Earth and Moon should be considered a double planet,since the gravitational force by the sun on the Moon is approximately as big as that by the Earth on the moon.Using the data below for the Earth and Moon at the particular point in their orbits...
Saturday, January 21, 2017 by Abdurhman

Physics 20
Astronomers launch a satellite to explore a nearby asteroid that has come dangerously close to the earth.The satellite begins orbit around the earth,with an orbital radius 6.85 X 10^3 Km, before being moved to an orbit about the asteroid with a period of 9.06 X 10^3 S at a ...
Saturday, January 21, 2017 by Abdurhman

Physics 20
Astronauts in orbit appear to be 'weightless'.Suppose an astronaut with a mass of 154 KG including gear is in orbit in the space shuttle, a distance of 222 km above the Earth;s surface.Taking the Earth's radius to be 6371km, and its mass to be 5.97 X 10^24, A) What is the ...
Saturday, January 21, 2017 by Abdurhman

eng
the primary purpose to al gore's an inconvenient truth is a. to inform the readers that there is environmental hazard in burning fossil fuels b. to entertain readers with stories from his college days and his professor's quotations c. to persuade the readers that by taking ...
Thursday, January 19, 2017 by help

Physics
A helicopter is ascending vertically with a speed of 5.20 m/s. At a height of 125 m above the Earth, a package is dropped from a window. How much time does it take for the package to reach the ground? [Hint: The package's initial speed equals the helicopter's.]
Thursday, January 19, 2017 by Jay

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