Why must the centre of the satellite orbit coincide with the centre of the Earth?

24,970 results, page 74

TO BOBPURSLEY

acceleartiononmoon= GMassmoon/radius^2 =G 7.35E22/(1.74E6)^2= G 2.43E10= = 6.67E-11*2.43E10= 1.62 m/s^2 or as a gravitational field constant= 1.62 N/kg I have no idea why you used the mass of Earth. were did you get a = r^-2 Gm from i thought that the equation was net force = ...

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?

EARTH SCIENCE

Do you foresee humans colonizing the planets and moons of our solar system in the long term future of our species? What kind of terraforming would be necessary to make this possible?

Science

Is the answer D? Thank you The earliest atmosphere of Earth is not believed to have contained oxygen. Which cellular component would not have been useful at that time? A) chloroplast B) nucleus C) plasma membrane D) mitochondrion

Literacy

Which of the following publications are both listed under the "Magazines" results? A. Science News and Earth Island B. Astronomy and Science C. Odyssey and Natural History D. The Economist and American Scientist my answer is D

Literacy

13. Which of the following publications are both listed under the "Magazines" results? A. Science News and Earth Island B. The Economist and American Scientist C. Odyssey and Natural History D. Astronomy and Science ANSWER IS A

Earth/Space Science

In many ways, the floor of oceans is no better explored than space. Why could discoveries such as life around deep-sea hotspots not be investigated until the past few decades?

physics

a boy throws a stone straight upward with an initial speed of 15 m/s on the surface of the earth. what maximum height above the starting point will the stone reach before falling back down?

physics

A 19 turn circular coil of wire has diameter 1.09 m. It is placed with its axis along the direction of the Earth's magnetic field of 51.0 µT, and then in 0.195 s it is flipped 180°. An average emf of what magnitude is generated in the coil?

Physics

A proposed space station includes living quarters in a circular ring 46.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?

Physics

Calculate the energy needed to accelerate a spaceship of mass 10,000 kg to a speed of 0.3c for intergalactic space exploration. Compare with the projected energy usage of the Earth in a decade~10^22J? well i don't know how to start the problem

Physics

A proposed space station includes living quarters in a circular ring 50.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?

Physics

A jet aircraft is flying due south at 300 m/s at a place where the earth’s magnetic field is 80 µT. Find the potential difference between the wing tips if they are 25 m apart. Which tip has the higher potential?

math

a well of diameter 3 m is dug 14 m deep . the earth taken out of it has beem spread evenly all around of it in the shape of circular ring of width 4 m to form embankment. find the height of embankment .

physics

On Earth a rock falls an unknown vertical distance from a resting position and lands in a lake. If it takes the rock 2.5 seconds to fall, how high is the cliff that the rock fell from?

writing

do you think that life on earth could become this difficult during your life time?what factor could cause to take place ?a story about that shows what life might be like in the world?

Science

Am I correct? Which of the following is an example of human impact on climate changes? • the greenhouse effect • changes in solar output • global warming • changes in the tilt of Earth's axis

Earth Science

Where are new volcanoes forming in Hawaii? I know the new volcanoe is Loihi but I'm not sure where it is forming.

Earth Science

Differentiate the composition and texture of a plutonic igneous rock and a volcanic igneous rock.

earth science

why is the arrival time for the p - wave earlier that the arrival of the s-wave the same seismograph station?

Earth science project

How do lost pet/pet ads predict earthquakes, procedure to do the project ?

geography

What part of a map tells the relationship of distance shown on the map to real distance on the Earth?

earth science

How are trenches related to plate boundaries? How are trenches explained by the theory of plate tectonics?

physics

How would your Mars weight compare to your earth weight if the acceleration due to gravity on Mars is 3.71 m/s2?

Physics

Gravity on the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 55.3 kg dune buggy on the moon?

Physics

What is the period of Earth's (nearly) circular motion around the Sun? (2*pi*r)/T 1 year (1 year)/(2*pi) (2*pi)/(1 year) 2*pi*(1 year)

earth science

How does the wavelength of the infrared portion of the electromagnetic spectrum differ from that of the visible portion of the spectrum?

Earth Space

If the temperature is rising, will condensation take place? (Or does it only take place when its cool?)

Math

The mass of Saturn is about 100 times the mass of Earth which is 5.97 x10^23 kg. How heavy is Saturn?

Physics

Q. Defined escape velocity obtain an expression for the escape velocity of a body from the surface of the earth?

earth science

the Julian calendar is the calendar we currently use. True or false. my guess is true

physics

The weight of an object is 480N on the earth and 120N on the moon,calculate the mass of the object on the moon

science

How are moon observations from space different from moon observations made on Earth? I think there is no deifference.

science

A rock sample weight 60N on earth. what would be the weight of the same rock on moon?

Maths

The speed of a point A due to the rotation of the earth is twice that of a point B.If A is on latitude 22°N.calculate the latitude of B

algebra

Joe's electric made 17 customer calls last wk and 23 calls this week. How many calls must be made next week in order to maintain an average of at least 21 calls per week for the three week period? At least blank calls must be made to maintain an average of 21 calls per week.

Science, Astrenomey

This is my theory, read well if you wish to know the truth: according to the big bang, there is a equal amount of anti-matter to the matter, BUT nearly all that matter is missing! In this theory there was NO anti-matter when the earth was made. anti-matter is made when ...

physics

Airplane flight recorders must be able to survive catastrophic crashes. Therefore, they are typically encased in crash-resistant steel or titanium boxes that are subjected to rigorous testing. One of the tests is an impact shock test, in which the box must survive being thrown...

Science Reposted for Jessica

Posted by jessica on Monday, November 19, 2007 at 4:16pm in response to Science. is some friction good for life on earth??

Algebra

Solve the equation w=Cr^-2 The weight of an object follows this equation. Where C is a constant, and r is the distance that the object is from the center of the earth. There are too many variables for me to know where to begin. Can someone get me started?

physics

the north pole of a compass is attracted to the north magnetic pole of the earth, yet like poles reple. can you resolve this apparent dilemma?

Physics

The north pole of a compass is attracted to the north magnetic pole of the earth, yet like poles repel. Can you resolve this apparent dilemma?

world geography

south america has both the wettest and direst places on earth? true or false,(false) i think the united state has both

earth science urgent

in the continental United States, what happens to rain that falls west of the Great Continenetal Divide? Rain that falls east?

PHYSICS

Suppose you are in a spaceship in freefall between Earth and the moon. How could you distinguish between a lead brick and an ordinary brick if you were blindfolded and wore gloves?

Earth Science

Lower case letters that come after the capital letter(s), e.g., KJk, labeling a rock unit represent the rock unit's _

Physics

Physics Help... Applying Newtons Laws Grade 11? On the surface of the earth a geological hammer has a mass of 1500g. Determine its mass and weight on Mars where g=3.6 m/s^2.

physics

Calculate the force of gravity between a newborn baby (mass = 2.6 kg) and the planet Mars (mass = 6.4 * 10^23 kg) when Mars is at its closest to Earth (distance = 5.6* 10^10m).

Science

Express mass of the Earth in unit of M. Take ME = 6 x 1024kg. The apparent magnitude of the sun is £¡ 26.81 and that of another star is£¡1.81. How much brighter the sun is with respect to that star ?

physics

heading due north at 6.00 m/s relative to the water. The local ocean current is 1.53 m/s in a direction 40° north of east. What is the velocity of the ship relative to the earth?

Physics

You weigh 710 N. What would you weigh if the Earth were seven times as massive as it is and its radius were six times its present value? Answer in units of N

Physics!!!!

Assume that a scale is in an elevator on the earth. What force would the scale exert on a 53 kg person standing on it when the elevator slows at 1.77 m/s2 while moving upward?

physics

A student sets up an Atwood machine with a frictionless rope, a 4.5-kg mass, and a 9.5-kg mass. What will be the acceleration of the masses? Use the gravitational acceleration found on Earth: g = 9.8 m/s2.

chem

A weather balloon at Earth’s surface has a volume of 3.9 L at 280 K and 795 mm Hg. If the balloon is released and the volume reaches 4.05 L at 704 mm Hg, what is the temperature? Answer in units of K

Physics Help Please!!!! Check!

if I weigh N on Earth and 5320 N on the surface of a planet, what is the acceleration due to gravity on that planet? mg=702N m=702/9.8=71.6 kg mg=5320N g=5320/71.6=74.3 m/s^2

SCIENCE

The burning of fossil fuels cause the earth to get warmer by putting carbon dioxide in the atmosphere and the carbon dioxide traps heat. MY GUESS: TRUE

astronomy

a light year is a unit of distance most comparable to the distance from earth to what? nearest galaxy nearest star outer solar system

earth/space

Maribel places her backpack and lunch bag on a lab table where there are lab materials. What is the safest way for Maribel to arrange the items?

science

if the mass of the earth is 598*10 to the power of 22km and the mass moon is 7.36*10 to the power of 22kg. calculate the difference in their masses, what is the answer in scientific notation

science

Tom is making the locations of the active volcanoes on a world map. Explain how the locations of the volcanoes are related to earth's plates? please help me im begging you

Science

a stone mass of 2.5kg is falling a certai height. Find the force of attraction between the earth and the stone. Also find its acceleration

Chemistry

Write the symbol for the elements that fit the following descriptions 1. 10 electrons in each -3 ion 2. 18 electrons in each +2 ion 3. The alkaline earth metal in the third period

Physics

A rocket that weighs 7840 N on earth is fired. The force of propulsion is + 10 440N. Determine a) the mass of the rocket, b) the acceleration of the rocket, c) the velocity of the rocket at the end of 8.0 s.

Earth Science

Considering the amount of energy required to produce animal-based foods and goods, should humans change their habits so they consume products closer to the bottom of the food chain because it is more efficient? PLEASE HELP.

Earth Space Science

What type of motion would have to occur to move or displace the fixed color lines produced by a gas like helium or hydrogen toward the 400 nanometer mark on the spectrum scale?

Critical Thinking

Which of the following statements is not a claim? A) Life exists on planets other than Earth. B) Dare to stay off drugs! C) Something's force equals its mass multiplied by its acceleration. D) Joe owns a pet dog.

physics

A 33300 lb (earth weight) rocket in outer space has two constant forces acting upon it, F1 = (-166i + 392j) lb and F2 = (50i + -54j) lb. Its initial velocity is (39i + 64j) ft/s. How far is it from where it started after 33 seconds?

physics

A 33300 lb (earth weight) rocket in outer space has two constant forces acting upon it, F1 = (-166i + 392j) lb and F2 = (50i + -54j) lb. Its initial velocity is (39i + 64j) ft/s. How far is it from where it started after 33 seconds?

6th grade

Scientists have calculated that the Moon's revolution around Earth is increasing by about .015 s per century. At this rate, how long would it take the length of a month to increase by one full day?

biology

What geological process is used to explain how nearly identical animals that cannot swim, are found on continents separated by large oceans? What is the half-life of Uranium 238 and what did we use that radioisotope to date as the oldest item on Earth?

physics

Explain why should torques, not forces, play essential roles in the following actions. (a) open or close a door (b) tighten or loosen a screw using a wrench c) "Give me a place to stand, and I shall move the Earth with it"

Language Arts

Which word best describes the tone of the following lines from "New World"? First Man, behold; the earth glitters with leaves; the sky glistens with rain. A. Appreciative B. Disgusted C. Puzzled D. Surprised Is the answer A? Thank you

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

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.

Scienc

The Main difference between terrestrial planets and gas giants is the way they are formed the shape of their obits the level of their density*** the plane in which they lie Where is most of Earth's freshwater located in lakes in rivers in oceans in glaciers***

Psychology 210

For this assignment, you will create a Microsoft® PowerPoint® presentation. Your presentation must briefly summarize how psychological disorders are classified including the role of the DSM IV. Your presentation must have at least one slide for each of the major classes of ...

Medical Records course

I know you can't give answers, but I have messaged my instructor three days ago and never got any response. Is there anyone who can clarify the given assignment? I do not want answers... thank you very much. :) Contrast the general responsibilities of records administrators ...

math

The Russian mathmatician Pafnuti L. Chebychev pved a remarkable theorem called Chebybchev's Inequality: In any data set, if p is the fraction of the data that lies within k standard deviations to either side of the mean, then p is greater than or equal to 1-1/k^2. a. According...

Mathematics--Urgent

Don is planting flowers in the school garden's planter box. The planting are is five and one-half feet long and 10 inches wide. Each plant is 2 inches wide. There must be 8 inches of space between the flowers. What is the largest number of plants he can put into the planter ...

English thinking

I am looking for why the media does not talk about bird flue , any more? Is there is some reasons why they do not talk about it anymore, do u have any idea? Yes. It does not sell anymore. Media tend to go with sensationalism, and not cover subjects that are well worn. Some of ...

physics

Two canoeists start paddling at the same time and head toward a small island in a lake. Canoeist 1 paddles with a speed of 1.40m/s at an angle of 45 degrees north of east. Canoeist 2 starts on the opposite shore of the lake, a distance of 1.5 km due east of canoeist 1. A) In ...

physical science

16. When a bullet is fired from a rifle: mine is D A. the recoiling rifle and the bullet have the same kinetic energy and momentum B. the bullet has greater momentum and kinetic energy than the rifle C. the rifle has greater momentum and kinetic energy than the bullet D. they ...

science

1.A dog is trained to sit and shake hands. These traits are most likely (1 point) a) inherited b) not inherited*** c) not acquired d) innate 2.In a particular breed of cattle, a black coat is dominant over a red coat. If a cow with a red coat is crossed with a black bull that ...

Microsoft Word file glitch

I must have hit the wrong key. As I was writing a Microsoft Word document, the whole screen changed and now everytime I hit the "Enter" bar, a black Paragraph symbol prints. Each letter has a dot between it as though I am seeing the visual representation for what the program ...

MAT/117- Appendix E

Answer the following questions. Use Equation Editor to write mathematical expressions and equations. First, save this file to your hard drive by selecting Save As from the File menu. Click the white space below each question to maintain proper formatting. Hint: Pay attention ...

U.S. History

What challenges did the Radical Republicans face during the Reconstruction period? The Radical Republicans fought for political supremacy. They had two main goals: Break the power of wealthy planters who had long ruled the South. Ensure that freedman received the right to vote...

Physic please check

A house has a floor area of 119 m2 and an outside wall that has an area of 32 m2. The earth's magnetic field here has a horizontal component of 2.1 x 10^-5 T that points due north and a vertical component of 5.0 x 10^-5 T that points straight down, toward the earth. (a) ...

Science

How does accuracy differ from precision? Accuracy is how close a measurement is to a generally accepted value. Precision is how many digits the measurement is. My weight is 160 lbs, generally accepted as true. My to scales recoreded my weight as 164lbs, and as 144.432 lbs. The...

Math (PLEASE HELP!)

1. Suppose the height, h, in feet, of a trampolinist above the ground during one bounce is modelled by the quadratic function h(t) = -16t2 + 42t + 3.75 . For what period of time is the trampolinist at least 22 ft above the ground? Round your answers to the nearest hundredth. (...

Math

There are 61 known moons. Mercury and Venus do not have moons, but each of the 7 other planets has at least 1. How do I find the % of total moons for each planet? Earth - 1 Mars - 2 Jupiter- 16 Saturn - 18 Uranus - 15 Neptune - 8 Pluto - 1 Thanks for your help.

phyics/moon

The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. What net force would be required to accelerate a 20-kg object at 6.5 m/s2 horizontally on the moon? A) 1.3 N B) 20 N C) 33 N D) 120 N E) 130 N

**WORLD GEOGRAPHY 30**

Which of the following statements is not true? a) rural settlement is north america is primarily dispersed. b) agglomerated rural settlement is most commong in the world. c) the agglomerated pattern exists in lands colonized by europeans. d) an agglomerated village can be ...

Environmental Science

Earth's surface water is found in a.lakes b.rivers c.streams d.all of the above I picked d. because that's where SURFACE water is at right? yup ditto.....

earth science

what are the main differences between a chain formed at a divergent plate boudary and those developed at convergent plate boundaries? explain the differences

earth science!!!

what are the main differences between a chain formed at a divergent plate boudary and those developed at convergent plate boundaries? explain the differences

earth science

1) What has happened to the ice in Greenland? What does Gore say will likely happen? 2) How high does Gore say sea level will rise if nothing is done? In how many years?

Physics

An airplane pilot tries to fly directly east with a velocity of 800.0 km/h. If wind comes from the southwest at 80.0 km/h, what is the relative velocity of the airplane to the surface of Earth?

Chemistry

A weather balloon at Earth's surface has a volume of 4.00 L at 304 K and 755 mm Hg.? If the balloon is released and the volume reaches 4.08 L at 728 mm Hg, what is the temperature? What gas law do you use?

EARTH SCIENCE

Discuss the distribution of seafloor sediments in the ocean basins. What are the different types of sediments? What are the factors that control their distribution (geologic setting, climate, etc.)?

EARTH SCIENCE

Discuss the distribution of seafloor sediments in the ocean basins.What are the differents types of sediments? What are the factors that control their distribution(geologic setting climates, etc)?

Pages

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
  7. 7
  8. 8
  9. 9
  10. 10
  11. 11
  12. 12
  13. 13
  14. 14
  15. 15
  16. 16
  17. 17
  18. 18
  19. 19
  20. 20
  21. 21
  22. 22
  23. 23
  24. 24
  25. 25
  26. 26
  27. 27
  28. 28
  29. 29
  30. 30
  31. 31
  32. 32
  33. 33
  34. 34
  35. 35
  36. 36
  37. 37
  38. 38
  39. 39
  40. 40
  41. 41
  42. 42
  43. 43
  44. 44
  45. 45
  46. 46
  47. 47
  48. 48
  49. 49
  50. 50
  51. 51
  52. 52
  53. 53
  54. 54
  55. 55
  56. 56
  57. 57
  58. 58
  59. 59
  60. 60
  61. 61
  62. 62
  63. 63
  64. 64
  65. 65
  66. 66
  67. 67
  68. 68
  69. 69
  70. 70
  71. 71
  72. 72
  73. 73
  74. 74
  75. 75
  76. 76
  77. 77
  78. 78
  79. 79
  80. 80
  81. 81
  82. 82
  83. 83
  84. 84
  85. 85
  86. 86
  87. 87
  88. 88
  89. 89
  90. 90
  91. 91
  92. 92
  93. 93
  94. 94
  95. 95
  96. 96
  97. 97
  98. 98
  99. 99
  100. 100