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

25,143 results, page 80

Solar Energy

With respect to a PV module's I-V and P-V curves, and the module's operating point, consider the following statements: a) When the operating point of the PV module is on the MPP (maximum power point), \(P_{mpp} \lt V_{oc} \times I_{sc} \) b) For a given Irradiance and ...

social studies

the task of economic policy is to create a properous america. The unfinished task of properous Americans is to build a Greta Society. Our accomplishment have been many; these tasks remain unfinished:> to achieve full employment without inflation;> to restore external ...

science

these are all very confusing for me 1. 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 ...

math

Jeanette wishes to retire in 30 years at age 55 with retirement savings that have the purchasing power of $300,000 in today’s dollars. 1. If the rate of inflation for the next 30 years is 2% per year, how much must she accumulate in her RRSP? 2. If she contributes $3000 at ...

physics

A mass m = 88.0 kg slides on a frictionless track that has a drop, followed by a loop-the-loop with radius R = 15.8 m and finally a flat straight section at the same height as the center of the loop (15.8 m off the ground). Since the mass would not make it around the loop if ...

BAA App. Essay Help! (please read!)

One of my personal achievements has to do with artistic. When I was in the 7th grade I participate in the 2012 Reflections Competition. The theme was "Diversity Means...". I decided to do visual arts. In my art work, I drew a huge earth and on top of the earth I drew five ...

9th Grade Biology

Sometimes, a new experimental result may seem to go against a well-established scientific theory. Often, such results seem like they are the results of researcher error. Regardless, scientists cannot just ignore new findings that disagree with accepted ideas. Which statement ...

math

the serface of our earth is 20'c for every km, k below the surface the tempature increses by 10'c. let t represent the tempature in 'c 1a write an equation that represent the relationship between disatnce k and t tempature 1b. what is the slope and and y-intercept

science/maps

Earths diameter is about 13,000 Kilometers. If a globe has a diameter of 0.5 meter, write the globe's scale as a ratio. What distance on Earth would 1 centimeter on the globe represent?

physics

the solar energy arriving at the outer edge of earth's atmosphere from the sun has intensity of 1.4 kW/msquared. how much mass does the sun lose per day? what percent of the sun's mass is this?

physics

The planet mars has a mass of 6042e23 kg and a radius of 3038e6 m. how much would a 60 kg person weigh on Mars compared to their weight on Earth? How heavy he would feel he weighed in kg on Mars?

geography

Does a line of latitude or a line of longitude divide the Earth into Northern and Southern Hemispheres? This is an easy one but I just want to double check. The answer is a line of latitude. Right?

Physics

An horizontally flying airplane has a 20 m wing span. If the vertical component of the Earth's magnetic field is 2*10^-5 T, and the voltage measured from wing tip to wing tip is 4 mV, What is the ground speed of the plane? (A) 5 m/s (B) 20 m/s (C) 7 m/s (D) 10 m/s

Physics

An horizontally flying airplane has a 20 m wing span. If the vertical component of the Earth's magnetic field is 2*10^-5 T, and the voltage measured from wing tip to wing tip is 4 mV, What is the ground speed of the plane?

English

The Catholic Church condemned Galileo because in his teachings earth and humans were not the center of all things. Identify random nouns Identify subjects Identify adjectives Thanks. (is Catholic an adjective)?

visual

Choose three (3) works of art from three artists from the Baroque period through the Postmodern era. Your three (3) works of art should come from the time periods or art movements covered in the reading from Unit 4 and Unit 5. Your choices must comply with the following ...

Math

50% Rule: The repackaged vial or unit dose must have an expiration date placed on it; but it is not the same expiration date as what is on the stock bottle. You must take the date on the stock bottle and write the half way date between today’s date and the expiration date. ...

Earth Science

1.Which statement made by a student after examining a rock specimen is an inference? (1)The rock is of igneous origin. (2)The rock has rounded edges. (3)The rock is light-colored. (4)The rock contains large crystals. Is it (1)?

Earth Science

can someone help me? you are given a sample of an unknown mineral. you determine that the mineral's streak is whte and its specific gravity is 2.8. is the mineral most likely to be a metallic mineral or a nonmetallic mineral? explain your answer. please help

English

Slaughter House Five For whatever reason, Billy cannot tell his wife, Valencia, about his Dresden experiences but fluidly recounts minute derails to Montana Wild hack. Why is this? Is she form of earth mother? A fantasy for bored, middle-aged married men?

english

3. Which one of the following statements is an example of a complex sentence? A. Sparrows at the bird feeder compete for seeds. B. Neap tide is the best time for digging clams. [C. The earth was spinning when Lucas first saw Lucille.] D. The crescent moon is a symbol of Islam.

Science

Please Check! 1. How does nanotechnology help engineers make products for the future? a. By changing a materials atomic structure, it can be made from elements that are easier to obtain.*** b. By changing a material's atomic structure, its physical properties can also be ...

Windows 7 operating system

A medium-sized survey company stores sensitive government data that is used as part of a study. A security requirement from the government requires that all sensitive data must remain stored at the company’s head office. All staff and the head office network have undergone a...

chemistry

Thimerosal is an organic compound (gram molecular mass = 404.8 g/mol) used to inhibit bacterial growth. A .100%solution of thimerosal is sometimes used as an antiseptic. Assume that this solution has a density of 1.00 g/mL. A. how many grams of thimerosal are found in .500 g ...

Environmental Science

The phosphorus, carbon, and nitrogen cycles are termed biogeochemical cycles- bio meaning "living"; geo for the earth (soil); and chemical referring to matter changing form. Explain why this term is appropriate. (I need a short answer)

trigonometry

Assume that the cities lie on the same north-south line and that the radius of the earth is 6400 km. Can you help me find the latitude of Spokane, WA if Spokane and Jordan Valley, OR, 43.15degreesN, are 486 miles apart. I think its either A. 47.50degN or B. 38.80degN thnks

Graphic Design

5. Which of the following statements regarding the Gestalt movement is true? A. Context has a great impact on reality. B. Expressive colors replaced traditional earth tones. C. Abstract art was born. D. Reality is given more precedence than perception. 6.

Physics

You are explaining why astronauts feel weightless while orbiting in the space shuttle. Your friends respond that they thought gravity was just a lot weaker up there. Convince them and yourself that it isn't so by calculating the acceleration of gravity 562 km above the Earth's...

earth/space science

Walking along the sidewalk one day, you find a rock and want to know what kind it is. You look at it and se that it is an off white color, is greasy feeling when you rub it, and your fingernail scratches it and breaks it up. What kind of mineral do you think you have found?

Science--2 questions! asap!

During the processes of erosion and deposition, sediments that are the_____ in size will be carried the greatest distances before being deposited. Most___rocks form under conditions found a few kilometers under Earth's surface.

Language Arts

Be still, sad heart! and cease repining; Behind the clouds is the sun still shinning; thy fate is the common fate of all, into each life some rain must fall some days must be dark and dreary 1. from the context, what do you conclude is the probable meaning of repining in the ...

science

On Earth as a whole, what happens to most of the presipitation? 1 It recharges the soil moisture deflict. 2 it becomes runoff and moves o the oceans. 3 it is store in the soil as capillary oceans. 4 it is returned to the atmosphere through evaporation and transpiration.

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.

science

Oblique rays are different from vertical rays because they a) contain more solar energy b) strike the earth at an angle greater than 90 degrees c)spread their energy over a larger surface area d) a and b e) b and c i think between d and e

science

Oblique rays are different from vertical rays because they a) contain more solar energy b) strike the earth at an angle greater than 90 degrees c)spread their energy over a larger surface area d) a and b e) b and c i think between d and e

science

Oblique rays are different from vertical rays because they a) contain more solar energy b) strike the earth at an angle greater than 90 degrees c)spread their energy over a larger surface area d) a and b e) b and c i think between d and e

PHYSICS ---HELP!

A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 6.2×10−5 rad. What diameter spot will it make on the Moon? Express your answer using two significant figures.

Physics Help!!

A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 6.2×10−5 rad. What diameter spot will it make on the Moon? Express your answer using two significant figures.

Trigonometry

The Chrysler Building casts a shadow approximately 130 feet long on the street when the Sun's rays form an 82.9 angle with the Earth. Approximately how tall is the building? Round you answer to four decimal places.

physical science

How many hours are required for a radio signal from a space probe near the dwarf planet Pluto, 6.00 x 10 (to the 9th) km away, to reach Earth? Assume that the radio signal travels at the speed of light, 3.00 10 (to the 8th) m/s.

health physics

Assuming that at the beginning of time (big bang; creation of the universe) there were equal numbers of U-235 and U-238 atoms produced, estimate the age of the Earth (using terrestrial U-235 and U-238 abundances).

chemistry

space probe Pioneer 11 was lanced April 5, 1973, and reached Jupiter in Dec.1974 traveling a distance of 998 km. How long did it take an electromagnetic signal to travel to earth from pioneer 11 when it was near jupiter?

DUMANGEZE

A 0.04KG BEAD SLIDES ON A CURVED STARTING FROM REST AT POINT A.THE EARTH FROM A AND B IS FRICTIONLESS ,WHILST THE PATH FROM B TO C IS ROUGH.IF THE BEAD ARRIVES AT POINT C WITH A SPEED OF 1M/S DERTIMINETHE AMOUNT OF WORKDONE BY THE FRICTIONAL FORCE IN PASSING FROM B TO C?

world history

With the adoption of Christianity by Constantine, the emperor A. stopped using images of pagan gods. B. ended pagan rituals and ceremonies. C. was no longer worshipped as a god. D. was called God's deputy on Earth. im not sure its it B or D

Physics

If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 2.35 m on Earth, what would be his maximum range on the Moon, where the free-fall acceleration is g/6 and g = 9.80 m/s2? b) (b) Repeat for Mars, where the acceleration due to gravity is 0....

physics

(a) If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 3.43 m on Earth, what would be his maximum range on the Moon, where the free-fall acceleration is g/6 and g = 9.80 m/s2? m (b) Repeat for Mars, where the acceleration due to gravity is...

Math/Trig

An airplane leaves an airport and flies due west 150 miles and then 170 miles in the direction 210°50'. Assuming the Earth is flat, how far is the plane from the airport at this time (to the nearest mile)

earth science

what would be the chart to use for carbon 14 whcih has a half life of 5730 years and a piece of wood which originally has 12 grams pf radioactive isotope; If the half lives occurred and now has 0.75 grams left?

English

What is meant by the subthemes: death as pervading life, time as the essence of death and self destruction, night as the environment of death, and death as the great isolator as applied to Pablo Neruda's poems, especially Residence on Earth?

Physics

A400 N child is swing that is attached tow ropes 2m long , find the gravitational potential energy of the child-earth system relative to the red line level when ropes make an angle with the vertical .

trig

city a is 300 miles directly north of city b assuming the earth to be a sphere of radius 4000 miles determine the difference in latitude of the two cities make answers accurate to the nearest second

Physics

rotating space station has radius 1380 m, measured from the center of rotation to the outer deck where the crew lives. What should the period of rotation be if the crew is to feel that they weigh one-half their Earth weight?

Science

How can volcanic eruptions change the surface of the earth? by creating large deposits of coal by creating new islands and land by lowering land levels several feet by decreasing the level of the ocean I think its C

Science

1. Which of the following about the suns structure is true? A.The sun has a solid surface. B. The sun has an interior and an atmosphere. * C.The sun's is similar to Earth's; it has a core, mantle, and crust. D. The sun's outermost layer is called the radiation zone.

Sociology

Soot plays an important role in climate change, but ______ is still the leading cause of Earth's changing climate. A. acid rain B. nitrous oxide C. carbon monoxide D. carbon dioxide I can't decide between B and D

Physics

A 3.79 kg ball is dropped from the roof of a building 163.8 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 11.5 N on the ball. How long does it take to hit the ground? The acceleration of gravity is 9.81 m/s2 . Answer in units of s.

LA

Which excerpt from the play provides additional support for the correct answer to the previous question? A. Mrs. Frank. [To Anne] You're here, safe. You see? Nothing has happened. B. Anne. I'm a terrible coward. I'm so disappointed in myself. I think I've conquered my fear... ...

Language Art's

2.)Which excerpt from the play provides additional support for the correct answer to the previous question? A.)Mrs. Frank. [To Anne] You're here, safe. You see? Nothing has happened. B.)Anne. I'm a terrible coward. I'm so disappointed in myself. I think I've conquered my fear...

Astrophysics

I'm having trouble understanding the formulas for determining a planet's distance and mass. A planet's distance is related to the period of revolution and the mass of the central star (e.g, the sun). The relationship is called Kepler's Third law. Distance can also be ...

Chemistry/stoichiometry

For the reaction shown, calculate how many moles of NO2 form when each amount of reactant completely reacts. 2N2O5g = 4NO2g+O2g I am assuming that the first question must be converted to grams and the second question must be converted to kilograms I just need to know how to ...

math

at 7:00am joe starts jogging at 6 mi/h. at 7:10 am ken starts after him. how fast must ken run to overtake joe at 7:30am? If Joe runs at 6 mi/hr for 30 minutes (7:00 to 7:30), his distance traveled is 6 mi/hr x 0.5 hr = 3 miles. Ken starts at 7:10 and runs until 7:30 for a ...

Physics

Two hikers, Alisha and Caleb, are resting on a hillside; the hill has a slope of 30 degrees, and Caleb is sitting above Alisha, eight meters away. They’ve brought fruit to eat on the trail, but they want to trade. a) Caleb throws an orange down to Alisha, with its initial ...

physics

A 2.5 kg mass weighs 23.75 N on the surface of a planet similar to Earth. The radius of this planet is roughly 7.7 × 10 6 m.Calculate the mass of of this planet. The value of the universal gravitational constant is 6.67259 × 10−11N · m2/kg2

earth science

Which of the following is a true of passive continental margins A. They generally have a deep trench B. They have a continental rise C. Crust is destroyed at their boundary D. They always have a subduction zone

physics

A 4 . 7 kg mass weighs 39 . 95 N on the surface of a planet similar to Earth. The radius of this planet is roughly 6 . 2 × 10 6 m. Calculate the mass of of this planet. The value of the universal gravitational constant is 6 . 67259 × 10 − 11 N · m 2 / kg 2 . Answer in...

Chemistry

1. Before the Industrial Revolution, the concentration of CO2 in Earth’s atmosphere was about 275 ppm. Considering the effect of CO2 only, calculate the effect that the increase in CO2 has had on the pH of precipitation

Science

Where is most of the surface water on earth found? a) as freshwater in rivers b) as frozen water near the pole c) as groundwater under the surface d) as salt water in oceans I think its either A or D. Am I correct?

Geography

Need help with this: The following ten countries are choices: Senegal Ghana Nigeria Congo the Central African Republic Zambia Zaire Botswana Mozambique Zimbabwe Use the hints to find out which country they are talking about: 'One, the country must have a major river that does ...

Calculus

A construction company wants to build a rectangular enclosure with an area of 1000 square feet by fencing in three sides and using its office building as the fourth side. Your objective as supervising engineer is to design the enclosure so that it uses the least amount of ...

science

list 5 things plants must do to survive on land

Algebra

What values for x, if any, must be excluded in each of the following algebraic fractions? 1.17/x 2.3/(x-2)= 3.3x/((x+1)(x-2))= 4.(2x-1)/(3x^2+x-2)

LANGUAGE

A PEEL OF A BANANA (TWO WORDS,MUST RHYME)

LANGUAGE

A SAD FRUIT (TWO WORDS, MUST RHYME)

science

why most living things must have air?

physics

Why must the spectrometer be aligned each time a grating is replaced?

law ethics in medicine

when must employee be trained in a hipaa

ecology

Why must a producer be at the base of every food chain?

History

What does Jefferson mean by we must resort to manufacturing out

physics

the oxidation numbers of the elements in a compound must add up to

physics

the oxidation numbers of the elements in a compound must add up to what

Math

If qrs / r = s and the value of q is 0, which of the following must be true? Explain why. a) r = 0 b) s = 0 c) s / r = 1 d) qr / r = 1 e) s = 2r

math

using 1,2,3,4 only one time and must equal 29

chem

What must be the molarity of an aqueous solution of NH3 if it is 4.2% ionized?

chemistry

if 23 g of Fe2O3 formed, how many grams of Fe must have reacted?

chemistry

How many grams of NaCl must react to produce 1.00 g Cl2?

chemistry

the solubility of MG(OH)2 is 0.61 g/L What must be the PH of this solution. and thx dr. bob for last question

Chemistry

What must be the pH of a solution that is 0.049 M Fe3+ to just cause Fe(OH)3(s) to precipitate?

chemistry

What volume of 12 M HCL must be diluted to make 2L of solution with pH of 4?

chemistry

What must be the pH of a solution that is 0.067 M Fe3+ to just cause Fe(OH)3(s) to precipitate?

statistics

What type of data must you collect to conduct a t-test? Why?

science

In order for conduction to occur particles must make what?

chemistry

what difficulty must be overcome when mixing water and margarine? why?

Statistics

What type of data must you collect to conduct a t-test? Why?

math116

-8x-27=-32 1/5 the solution must be in the form as an integer or simplified fraction. Thank you.

chemistry

how many grams of CaCl2 must be dissolved to make 2.15 L of 0.05020 M Cl

chemistry

how many grams of CaCl2 must be dissolved to make 2.15 L of 0.05020 M Cl

Geometry

In Triangle SUM, if SU = 10 cm and UM = 15 cm then MS must be less than how many centimeters? 10 15 20 25...... Am I right?

math

how many times must the number 5 be subtracted to find the quotient of 5/5?

Calculus

Let If f(x) is a function which is continuous everywhere, then we must have m=________________

Statistics

What type of data must you collect to conduct a t-test, why?

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