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

24,970 results, page 83

Science

What must happen to the electrons in a material to create an electric current?

Algerbra

f y = (x + 3)2, then (-2x - 6)2 must equal which of the following? A. -4y2 B. -2y2 C. -4y D. 4y is A the right answer

Geometry

If a quadrilateral has exactly one pair of sides parallels it must be a

Math

How must unit cubes be stacked when used to measure volume?

life orientation

Emotion oh how bad fraud and corruption are and how they must be avoided

Physics

what must be the net force if a 19.9 kg mass accelerates to the left at a rate of 2.2m/s^2?

algebra

What is the smallest number that must be subtracted from 9x2+9x+4 to make it divisible by (3x+1)?

Chemistry

What volume of 17 M sulfuric acid must be used to prepare 0.15 L of 1.78 M H2SO4?

Math

How many kg of pure salt must be added to 8 kg of a 30% solution to obtain a 35% soltution?

Math

Parallelogram ABCD is inscribed in a circle. Then, the measure of angle A must be 90?

math

if A=5^3*7^3*3^4, find the smallest number A must be multiplied to get a perfect square

science

where can you see earth's atmospere clearly Well, you can see light that is scattered from microscopic dust particles in the atmosphere during the day from any point: That blue color of the sky is that scattered light.

science

How large a current would a very long, straight wire have to carry so that the magnetic field 2 cm from the wire is equal to 1 G (comparable to the earth’s northward-pointing magnetic field)?

algebra 2

a research station in antartica is at approximately 75 degreess latitude. how many miles is the station from the equator, given that the radius of the earth is approximately 4000 miles? round your answer to the nearest mile.

Physics

An asteriod is found a distance from the sun equal to 32 units times the earth's distance. What will be the length of time in years required for this asteriod to make one revolution around the sun?

physics

A hang glider is travelling horizontally at 13 m/s and is located 326 m above the surface of the earth. Suddenly and accidentally a water bottle falls from it. How far will the water bottle travel horizontally?

English

Choose the answer that best matches the word "millennia" For many millennia, people believed Earth was flat. reasons thousands of years*** generations of people beliefs or propositions *** - My Answer

SCIENCE

The intensity of solar radiation at the surface of the earth is 1kW/m2 . A roof has a square solar panel of sides 10m that absorbs the radiation completely. What is the average force exerted on the panel?

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

Physics

A car heads due west on Interstate 80 going 63.0 km/hr for 2.1 hours. The car then turns and heads exactly northwest on Interstate 42 going 53 km/hr for 3.3 hours. What is the resultant displacement of the car? I've done some work on it and I have a good idea. I found the ...

Geometry

3.In step 1, you found the volume (in cubic feet) of the main tank. If the maximum density of killer whales per cubic foot is 0.000011142, what is the maximum number of killer whales allowed in the main show tank at any given time? You must explain your answer using words, and...

Physics - solar power in space

Hi, this requires some basic knowledge of astrophysics. I missed last lecture that covered this, so though I'd prefer thorough solutions to these problems, I'd appreciate it even if you could tell me which formulas to use to solve each part of the problem. Thanks! NASA’s ...

Physics

The hammer throw is a track-and-field event, popular in Scotland, in which a ball on a rope (the "hammer") is whirled around the thrower in a circle before being released. The goal is the send the ball as a projectile as far down the field as possible. At a track meet, the ...

physics

Proponents of astrology claim that the positions of the planets at the time of a baby's birth will affect the life of that person in important ways. Some assert that this effect is due to gravity. Examine this claim with Newton's law of gravity. Calculate the maximum force ...

algebra

please review the questions and table and check my answers. tank you tutors. table planets' orbital velocity planet orbital velocity (mi/s) mercury 29.74 venus 21.76 earth 18.5 mars 14.99 jupiter 8.12 saturn 6.02 uranus 4.23 solve. show your work. express the answer in ...

Science Please Check

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 ...

physics

Since the industrial revolution, the Earth's average surface temperature has Answer a. risen about 1 K. b. has risen about 3 K. c. has risen about 5 K d. Has not changed significantly.

outer space

scientifically speaking (not philosophically or something), what is the probability that earth is the only planet in the universe that holds life? THANK YOUSOOO MUCH Depends on how one defines life. Zero is the best answer I can offer. Creationists would likely challenge that ...

earth science

21. Billions of fossils of plants, fishes, and land animals, many almost perfectly preserved, could not have been buried by natural _______ observable in the world today. DEATHS DISEASES EVELOUTION PROCESSES processes right? That makes good sense to me.

science

The Big Bang Hypothesis suggests that 20 billion years ago a) life first formed on the planet earth b) all matter collapsed into a single ball c) our sun was born d) space was much the same as it is today e) matter did not exist a

physics

A 2.40 m length of wire is held in an east-west direction and moves horizontally to the north with a speed of 14.9 m/s. The vertical component of Earth's magnetic field in this region is 40.0 µT directed downward. Calculate the induced emf between the ends of the wire and ...

physics, magnetism

A long thin copper wire has a mass of 100 grams / meter. If it is arranged near the surface of the earth pointing north in a 0.5 Tesla magnetic field pointing west, what current (in amps) is needed to levitate the rod (against gravity)?

science

A simple pendulum with bob of mass m and conducting wire of length L swings(is hanging ) under gravity thro' an angle 2theetha. The earth's magnetic feild component in the direction perpendicular to swing is B. the max potential diff induced across pendulum is?

phy

A frog applies a constant force of 80N while pushing him up a hill, while gravity and legs friction cause a constant 80N force in the opposite direction. In this situation a. the frog applied force of 80N means the frog must be accelerating b. the net force on the frog is 0N, ...

English

Correct the incorrect punctuation and type a semi-colon, colon, em dash, or parenthesis. What can be done about pollution? I know what I must do(and will do--to help reduce pollution. Although, the way I see it, there are at least three things we all should do; (1) recycle ...

ACC220

Select a management function (planning, directing and motivating, or controlling) and explain how that function relates to business as a whole. Next, select a different function listed by a classmate. Discuss with your classmate how the functions you each selected complement ...

science

Relate progressing fossil evidence, changing habitats and climates to multiple adaptations and thus lifestyle changes. My first example is bipedalism but would another one be that sinc the earth got colder intelligence increased which caused humans to learn how to mke tools ...

Earth Science

1Which statement best illustrates a classification system? (1)A glacier melts at the rate of one meter per year. (2)Ocean depths are measured using sound waves. (3)Snowfall predictions for winter storms vary. (4)Stars are grouped according to color. Is it (4)?

earth science

#33 When conducting an experiment that deals with boiling chemicals, which of the following pieces of equipment would be most important to protect you from being injured? a. fire blanket b. eye wash c. tongs d. goggles I cant decide between c and d because your eyes do need to...

chem

i have several problems i am caught on for my homework. I appreciate any help 1. As milk spoils, rancid components begin to coagulate. This could be interpreted as a: a.a colloid forming a suspension. b.solution forming a colloid. c.solution forming a suspension. d.suspension ...

science

earth and the moon are kept in their respective orbits due to the influence of ? a) inertia b) gravity c) both inertia and gravity d) neither inertia and gravity

Physics

The intensity of an earthquake wave passing through the Earth is measured to be 2.5×106 J/m^2 at a distance of 48 km from the source. What was its intensity when it passed a point only 2.0 km from the source? At what rate did energy pass through an area of 3.0 m^2 at 2.0 km?

Chemistry

Strong sunshine bombards the earth with about 1 kJ.m-2.s-1 Calculate the maximum mass of pure ethanol that can be vaporized in 10. min from a beaker left in strong sunshine, assuming the surface area of the ethanol to be 50.cm 2 .

Math

The distance from earth to planet X is 1.7(10^7)miles. If a spaceship is capable of traveling 1,420 miles per hour, how many DAYS will it take the spaceship to reach the planet X? Round the answer to the nearest day.

Science

The intensity of an earthquake wave passing through the Earth is measured to be 1.5×10^6 J/m^2*s at a distance of 58km from the source. What was its intensity when it passed a point only 2.0 km from the source? At what rate did energy pass through an area of 3.0 m^2 at 2.0 km ?

physics

If the acceleration due to gravity on the Moon is 1/6 that what is on the Earth, what would a 100 kg man weight on the Moon? If a person tried to simulate this gravity in an elevator, how fast would it have to accelerate and in which direction?

Physics

A ship sets sail from Rotterdam, The Netherlands, heading due north at 5.00 m/s relative to the water. The local ocean current is 1.54 m/s in a direction 40° north of east. What is the velocity of the ship relative to the earth?

Science

Karen is studying types of spacecraft. Which of these spacecraft can people use to travel to and from orbits close to Earth? A)space probe B)space shuttle C)space station D)space telescope I think the answer is C.

English

Several of the characters in The Odyssey experience conflict. List three characters, state a conflict of theirs and briefly tell how they resolve it. Odysseus: Must defeat the cyclops, does so by blinding it. He and his men then tie themselves to the underbellies of sheep, so ...

Science

WHat names do we give to portion of the earth form (a) our gaseous environment, (b) our liquid environment, and (c) our solid environment. My answers a. greenhouse gases b. ocean c. land

Earth Science

Rock A has pieces of Rock B included inside it. Which rock is older and how do you know? My answer- I know rock B is older but I don't know how to explain it. Can someone help?

Science

scientists often use models to Study the movement of earth and it's moon. Why do they use models to study the movements?

maths

Here on earth it is true,yesterday is always before today;but there is a place where yesterday always follows today.Where?

p i s j

The mass of fan astronaut is 100kg 1)find its weight on earth. 2)find its weight on moon. When the gravitational acceleration on moon is 1.6 ms

physics

An object on earth has a weight of 54.3N, what is the weight of the object on the moon, assuming acceleration due to gravity on the moon is 1.61m/s^2?

Earth Science

20. Contrast point source pollution and nonpoint source pollution. Can someone help me please?!?!?! Asap please?!?!?!?!

physics

You are a member of an alpine rescue team and must get a box of supplies, with mass 3.00kg , up an incline of constant slope angle 30.0∘ so that it reaches a stranded skier who is a vertical distance 2.90m above the bottom of the incline. There is some friction present; ...

science

which of the following statements best describes the biosphere? a) it is a mixture of gases that contain dust particles b)it contains earths metal core c) it contains all of earths water d) it it the part of earth that contains living organisms is it d ?

science

which of the following statements best describes the biosphere? a) it is a mixture of gases that contain dust particles b)it contains earths metal core c) it contains all of earths water d) it it the part of earth that contains living organisms is it d ?

ap physics

The acceleration due to gravity on the moon has a magnitude of 1.62 m/s. deal with a placekicker kicking a football. Assume that the ball is kicked on the moon instead of on the earth. Find (a) the maximum height H and (b) the range that the ball would attain on the moon.

physics

A person pushes with force F on a box which remains at rest on a rough floor as shown in the top figure. The bottom figures illustrates all the force acting on the box. a) What condition must be satisfied by all the force acting on the box so that it remains at rest? Draw a ...

English

you will submit an annotated bibliography. You must include five reliable (good) sources and five unreliable (bad) sources. Each of your ten entries must include the following: An MLA reference. A summary. An evaluation. Is the source reliable or not? Provide two reasons to ...

computer programming

: Create a program like KBC game show where program ask user 3 different question one after another and the user should answer them. If the answer are correct then pop up the message as “you got the right answer” and must ask user does he/she wants to go for next question ...

@elena

thank you so much help with the problem. i have trouble solving part b of the problem you helped me with. it told me to give it as a percentage, I got 10% but it is wrong. can you please help me Superman must stop a 190-km/h train in 180m to keep it from hitting a stalled car ...

physical science

How much heat must be added to 1.0kg of steam at 100 degrees Celsius to convert it to steam at 110 degrees Celsius? How much heat must be added to 1.0 kg of water at 100 degrees Celsius to convert it to steam at 100 degrees Celsius?

algebra

Write and solve an inequality to find the approximate circumference of Earth using the following information - the 4 million miles of public roads in the U.S. would: Reach to the moon and back more than eight times, circle the globe more than 157 times

Earth Science?

What is the climate? Darwin, Australia has its coolest month in July, with an average temperature of 77 degrees F. It has a dry season from May to October. The grassy areas nearby are home to cattle ranches. a) Not tropical b) Tropical rainforest c) Tropical monsoon d) ...

World History

With the adoption of Christianity by Constantine, the emperor A. was no longer worshipped as a god. B. was called God's deputy on Earth. C. stopped using images of pagan gods. D. ended pagan rituals and ceremonies. My answer is B. but i am not quiet sure is i am correct.

Physics

An airplane flies 340 km due east, makes a right-angle turn, and then flies 390 km due north. Find the magnitude of the plane’s displace- ment from its starting point. Neglect the curvature of the earth. Answer in units of km

Earth science

Waste produced by people along the East Coast of the United States has been dumped into the Atlantic Ocean where it is distributed by surface ocean currents. Which coastal area is most likely to become polluted by this waste?

Science

1. How does sea-floor spreading occur? A. New materials are being added to the asthenosphere. B. Earthquakes brake apart the ocean floor. C. Sediments accumulate at the area of spreading. D. Molten material beneath Earth's crust rises to the surface.*

math

Q2. An agriculture field is rectangular,with dimensions 100m by 42m.A 20m deep well of diameter 14m is dug in acorner of the field and the earth taken out is spread evenly over the remaining part of the field. Find the increase in the level of the field.

beast mode question

Beastmode Question You see me twice a minute, thrice an hour and geometrically equal to the time elapsed. If the sun rise at x m/sec and the cloud run through the sky at y m/sec, find the maximum RADIUS OF THE EARTH.

physics

At ground level g is 9.8meter per second square. Suppose the earth started to increase its angular velocity. How long would a day be when the people on the equator were just 'thrown off' why is the expression thrown off is a bad one?

Science Help!

How does sea-floor spreading occur? A)New materials are being added to the asthenosphere B) Earthquakes break apart the ocean floor C)Sediments accumulate at the areas of the spreading D)Molten material beneath Earth's crust rises to the surface

physics

I need help with an equation for: Find the force of attraction between a bowling ball of mass 7.26 kg and the earth if the bowling ball was located at sea level. How does this compare to the weight of the bowling ball as calculated by Fg = mg? Thank you

english check

Treat the Earth and all that dwell thereon with respect. Remain close to the Great Spirit. Show great respect for your fellow beings. Work together for the benefit of all Mankind. Give assistance and kindness wherever needed. Do what you know to be right. Look after the well ...

Saint Michael.

What was Saint Michael's life on earth like?

science

how are alkali metals and alkali earth metals different?

math

the disney golf classic starts with 64 golfers. the golfers form pairs and each pair plays a match. the losers drop out and the winners of each pair then form new pairs and play again. then those winners form pairs and play. this continues until there is one winner. in how ...

English A1 Poem

All afternoon my brothers and I have worked in the orchard, Digging this hole, laying you into it, carefully packing the soil. Rain blackened the horizon, but cold winds kept it over the Pacific, And the sky above us stayed the dull gray Of an old year coming to an end. In ...

Physics

What does it mean to say that angular momentum is conserved? Give an example you might see on Earth. How could conservation of angular momentum help astronomers understand the development of the solar system? (this the part of the question that I don't understand)

chemistry

If you had one mole of pennies to divide among all the people in the world, how many dollars would each person receive? Use 5thousand as the population of Earth. how do you find how many pennies are in one mole?

Chemistry

Determine the potential (in V) of an electrochemical cell using a gold electrode and gold (III) [0.0243 M] solution in combination with a manganese/manganese (II) [0.00567 M] half cell How on earth would I do this question? I just know Au(3+) + 3e- = Au and E = 1.22 V

Physics

At a certain location, the Earth's magnetic field has a magnitude of 5.90E-5 T and points in a direction that is 71.6° below the horizontal. Calculate the magnitude of the magnetic flux through the top of a desk at this location that measures 132 cm by 83.3 cm.

chemistry

Lead is often found in Earth's crust as several lead compounds. Calculate the mass in kilograms of the amount of each of the following lead compounds that contains 4500kg of lead. 1)PbCO3 (cerussite) 2) PbSO4(anglesite)

physics

An airplane is flying horizontally with a speed of 1000 km/hr (278 m/s) when it drops a payload. The payload hits the ground 37 s later. (Neglect air drag and the curvature of the Earth. Take g = 10 m/s2.) (a) At what altitude H is the airplane flying?

Science

Which characteristic tells how the Earth and the moon are alike? A. Both have similar weath conditions B. Both rotate around the Sun C. Both receive light from the Sun D. Both are the same size I think its C

earth space science

Potassium-40 has a half-life of approximately 1.25 billion years. Approximately how many years will pass before a sample of potassium-40 contains one-sixteenth the original amount of parent isotope?

physics

if Royce was 10 years old and he had a mass of 30kg. but by the time he turned 16 his mass has grown to 60kg. how much larger is the gravitational force between Royce and earth at age 16 compared to age 10

Physics

Using the scale (1 light-minute equals 10 mm), how many millimeters represent a light year? On this scale, what is the distance from Earth to the nearest star? To the Andromeda Galaxy? (Note that 1 meter = 103 mm and that 1 km = 103 meters.)

Astronomy

The volume of a ball is given in terms of its radius by V=(4*pi/3)*R^3. Use this to find the average density of Nursat, i.e. the mass per unit volume. Use Earth'€™s mass in kg from the Table of Constants to express your answer in kg/m3.

physics

Using sidereal navigation, a pilot flies due south for one hour then due north one hour and lands about 180 miles west of where he started. At what point on Earth is he?

Math (geometry)

Earth's diameter at the equator is about 7926 miles. A jet flies 550 miles per hour. How long would it take the jet to fly halfway around the equator?

physics

A bomber drops a bomb from an aircraft flying at 2000Km/h with an altitude of 7 Km. The speed at which the bomb will strike the earth would be. a) Greater than 2000Km/h b) Less than 2000 Km/h c) Equal to 2000 Km/h d) Can not compare with the given data

Science

A 0.10 kg of steel ball falls on earth from a height of 10 m and bounces to a height of 1.0m . Let all the dissipated energy were absorbed by the ball as heat, calculate the rise in temperature if specific heat capacity of is 0.12 cal/g/deg C.

Earth Science

11.   Which earthquake scale takes into consideration the damage caused by an earthquake?  A. Amplitude scale B. Moment magnitude scale C. Richter scale D. Modified Mercalli scale D?

History

When Truman used the phrase "alternate ways of life," what two ways of life was he talking about? This is from my book: "At the present moment in world history nearly every nation must choose between alternative ways of life. The choice is too often not a free one. One way of ...

please read

As an interested bystander, let me add just one bit to the replies and counter responses. It IS NOT correct Internet behaviour to post full name, address, etc etc. Predators are everywhere. Student's should not use their real name (first name is OK) but any other identifying ...

Geography (Ms. Sue)

1). What landforms must be crossed by pioneers going from Independence, Missouri, to the Pacific coast? 2). What kinds of movement were taking place in the United States in the last half of the 20th century? My answers to the questions are the following: 1). Pioneers traveling...

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