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

25,660 results, page 99

1. ### Physics

If you were in an elevator what should the acceleration of the elevator be in order for you to feel what you would weigh on the martian surface(remember that acceleration is a vector, so it has both magnitude and direction)? (weight on earth=130 lbs, weight on mars=49 kg, ...
2. ### global warming

hi im doing a debate tomorrow on global warming, i am arguing that it DOES exsit. the opposing side who don't believe in global warming want to say that increases in temperatures don't cause sea levels to rise, instead the tectonic plates of the earth cause changes in sea ...
3. ### Forces Within and Deciphering Earth's History

If you find a large piece of granite that, upon inspection, contains smaller fragments of sandstone, which would you say is older, the granite or the fragments of sandstone? A. Sandstone B. It's impossible to tell. C. They're both the same age. D. Granite My answer is d.
4. ### Physics with work, pls help

A proton is moving in a circular orbit of radius 11.8 cm in a uniform magnetic field of magnitude 0.232 T directed perpendicular to the velocity of the proton. Find the orbital speed of the proton. Answer in units of m/s. I came up with .118/2.83x10^-7 and it was incorrect. (...
5. ### physical science

Consider a 100-kg box of tools in location: A: on Earth B: on the Moon C: on Jupiter. Rank from greatest to the least the a) masses of the 100 kg box of tools and b) the weights of the 100-kg box of tools.
6. ### Physics

An electron is relased into a uniform electric field of magnitude 8.35 N/C. How many times larger is this electrons acceleration than the acceleration due to gravity on the surface of Earth? Is it just F= qE = ma (for the electron, and using E for electric field), and then ...
7. ### trig

if diameter of the circle is 100 cm. and length of the arc forming the angle is 360 cm. Assume that the earth is a perfect sphere of diameter 8000 miles. Find the distance between: Rome, Italy: latitude 42 degrees north Copenhagen, Denmark: latitude 54.3 degrees north
8. ### physics

Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . A 3000 truck tows a 1500 car by a chain. Part A If the net forward force on the truck by the ground is 3500 , what is the acceleration of the car? Part B What is the tension in the ...
9. ### physics

On the Apollo 14 mission to the moon, astronaut Alan Shepard hit a golf ball with a golf club improvised from a tool. The free-fall acceleration on the moon is 1/6 of its value on earth. Suppose he hit the ball with a speed of 33m/s at an angle 28∘ above the horizontal.
10. ### Astronomy

If the giant blue star R136a1 has the diameter 35 times our sun, how many times bigger is it? example: our sun is 1.3 million times bigger than the earth. thanks for the help!
11. ### Earth Science

Which of the following organisms is most likely to survive? A. the top carnivore in a food chain B. a herbivore in a food chain C. the top carnivore in a food web
12. ### Earth Science

1. In the classroom during a visual inspection of a rock, a student recorded four statements about the rock. Which statement about the rock is an observation? (1)The rock formed deep in Earthâ€™s interior. (2)The rock cooled very rapidly. (3)The rock dates from the ...
13. ### Physics

The moon Europa, of the planet Jupiter, has an orbital period of 3.55 days and an average distance from the center of the planet equal to 671,000 km. If the magnitude of the gravitational acceleration at the surface of Jupiter is 2.36 times greater than that on the surface of ...

True or false during dry weather the water level in a small pond drops because of runoff. I think it's true but I'm not sure And in the water cycle water returns to earth as condensation usually in the form of rain or snow. Is that true? And when water vapor leaves it is ...
15. ### physics

A gas molecule at the surface of the earth happens to have the root mean square speed (rms)for that gas at 0°C.lf it were to go straight up without colliding with other molecules.How high would it rise and what would happen to the maximum height reached if a gas with heavier ...
16. ### CHEM

I kind of need some guidance with "PART C" below: A) The bond angles in CH4 are 109.5degrees, while the bond angles in NH3 are 107 degrees. Based on this information, which type of repulsion must be greater: BP-BP LP-BP ((((for this part I got: "LP-BP" as the correct answer...
17. ### science

for my intro i got a 'Water is the elixir of life'and i got lota of negative impact are trasportation, production is the reliance on fossil fuels,Raw plastic must be heated before it can be injected into bottle-shaped blow molds, and this heat source is often electricity or ...
18. ### modeling

A squadron of 16 bombers needs to penetrate air defenses to reach its target. They can either ﬂy low and expose themselves to the air defense guns, or ﬂy high and expose themselves to surface-to-air missiles. In either case, the air defense ﬁring sequence ...
19. ### modeling

A squadron of 16 bombers needs to penetrate air defenses to reach its target. They can either ﬂy low and expose themselves to the air defense guns, or ﬂy high and expose themselves to surface-to-air missiles. In either case, the air defense ﬁring sequence ...
20. ### english

correct any errors. Please check my answers. Question: 12) Every player on the team, must give their best effort in the championship game. Every player on the team, must give his or her best effort in the championship game. Question: 13) Each person in the seminar must submit ...
21. ### AP English

Hi, I am doing an essay for my english class that deals with American values. The questions to consider: What does America value? How do you know? In class we dicussed the following: America Values 1.)The individual The US was set up by the people themselves, thus they are to ...
22. ### physics

A uniform horizontal wire with a linear mass density of 0.48 g/m carries a 1.9 A current. It is placed in a constant magnetic field, with a strength of 3.5 10-3 T, that is horizontal and perpendicular to the wire. Neglect the magnetic field of the Earth. (a) As the wire moves ...
23. ### Science

What percent of water is not easily accessible or usable on earth? *A. .6% B. 12.5% C. 50% D. 99% Subtract the answer from the last question from 100%. What does the remainder represent and what are the sources of this percentage of water? A. 97% rivers only B. 1% lakes, ...
24. ### physics(relativity)

A boy runs a 100m distance in 20s as measured by an observer on earth.how long does it take according to an observer in space ship moving with speed of 0.98c for the boy to complete the run? What is the length of the track according to the moving observer
25. ### science

A boy runs a 100meter distance race in 20seconds as measured by an observer on earth.how long does it take according to an observer in space ship moving with speed of 0.98c for the boy to complete the run? What is the length of the track according to the moving observer?
26. ### Physics

An asteroid heads for Earth at 12 km/s. In addition, a NASA space team is able to attach a rocket booster to the asteroid, which then allows the asteroid to move at 28 degrees to its original path to a speed of 20km/s. What is its average accleration for acceleartion at (x) ...
27. ### Physics

An asteroid heads for Earth at 12 km/s. In addition, a NASA space team is able to attach a rocket booster to the asteroid, which then allows the asteroid to move at 28 degrees to its original path to a speed of 20km/s. What is its average accleration for acceleartion at (x) ...
28. ### management science

Riverside Oil Company in eastern Kentucky produces regular and supreme gasoline. Each barrel of regular sells for \$21 and must have an octane rating of at least 90. Each barrel of supreme sells for \$25 and must have an octane rating of at least 97. Each of these types of ...
29. ### GRAMMAR

Punctuate and capitalize the following sentences appropriately. 1. the psychiatric resident asked the patient why she came to the hospital to which the patient replied i have no idea ANSWER: The psychiatric resident asked the patient why she came to the hospital to which the ...
30. ### Math

I can't for the life of me solve this! 6x^2-23x+15=0 6x^2-23x+15 = (a x + b) (c x + d) --> a c = 6 (1) a d + b c = -23 (2) b d = 15 (3) You could write down all possibilities for a and c (Eq. 1) and all possibilites for b and d (Eq. 3) and see which one satisfies Eq. 2 But ...
31. ### 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 ...
32. ### qnt/561

Help bad golf balls shall not be greater than 1.620 ounces (45.93) the diameter of the ball shall be less than 1.680 inches the velocity f the ball shall not be greater than 250 feet per second. they check these often using random sampling, the dozen of each kind are sampled ...
33. ### college physics

Nobel laureate Richard Feynman (1918-1988) once said that if two persons stood at arm's length from each other and each person had 1% more electrons than protons, the force of repulsion between them would be enough to lift a "weight" equal to that of the entire Earth. Carry ...
34. ### Writing Essay 5th grade

Hello, I got an assignment writing persuasive essay why we should save water? Could plz check my essay and guide me if I need to change anything. Thank You for your help. Why we should save water. (Persuasive Essay) Have you wondered why we should save water and how we can ...
35. ### laws of motion

1Objects fall toward earth at a rate of 9.8 m/s^2 because of ______________ 2According to ________________________________ momentum lost equals momentum gained. 3The force keeping a ball on a string moving in a circle is _________________________. 4Anything that's thrown or ...
36. ### math

I'm trying to help my child with this problem.. 1.A bird is flying around the world at a rate of 12.2ft/sec. How many days will it take to complete its journey? (circumference of earth=25,000 miles. 2. A deep space probe is traveling at a velocity of 56.2km/s. What is its ...

You are the science officer on a visit to a distant solar system. Prior to landing on a planet you measure its diameter to be 2.070E+7 m and its rotation to be 19.8 hours. You have previously determined that the planet orbits 1.590E+11 m from its star with a period of 368.0 ...
38. ### Electrical Engineering

Find the latitude at Stanford University using Google Maps to the nearest degree (This is how you do it) and calculate the Air Mass Factor on the autumnal equinox (when the center of the sun is in the same plane as the equator of the earth) at noon (when the sun is directly ...
39. ### Physics

A plane is headed due west with an air speed of 221 m/s. The wind blows south at 37.5 m/s. Find the velocity of the plane relative to the earth. The question asks for the magnitude which I found is 224 m/s. The question also asks for the direction_____south of west. Can ...
40. ### physics

Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is whisked away in a space ship at 90% of the speed of light. After 65 years they are reunited. Will they look the same? I know that the twin that was ...
41. ### Comm Tech

1.)An eco-friendly home-building company has asked you to create their logo. Which of the following color schemes would work best to enhance the perception that their company is Earth-friendly? (1 point) A.)Green & Brown B.)Red & Yellow C.)Red & Blue D.)Pink & Yellow
42. ### art

My internet is down for my computer and I can only use data. I can't go back for my notes 1. This drawing was made using what natural resource? (1 point) A. harvesting the clay from a corn plant B. making the clay from water and pigments C. making the clay by mixing sand and ...
43. ### environmental science

What are some possible effects of climate change resulting from a warmer earth? Possible effects is melting of the polar caps, and flooding on all continents. Also, weather and rainfall patterns will change, so plants and animal will have a hard time finding food. Basically, ...
44. ### Trigonometry

Smalltown, latitude 53.6 degrees N, lies directly north of Bigville, latitude 38.6 degrees N. Give the distance between the two cities. (Hint: The earth's radius is about 3,960 miles.) This is a question similar to what will be on my test tomorrow. I'd really appreciate the ...
45. ### English

1. My friends and I looked (around) for our sleds. a preposition** b adverb 2. Jaime had never been sledding (before). a preposition** b adverb Identify the conjunction for the sentences in questions 6-7 6.Earth rotates on its axis and revolves around the sun. 7.Neptune is an ...
46. ### science

which of the following descriptions of the moon's surface is accurate? a) the moon's surface is wet and smooth b) the moon's surface is dry and irregular c) the moon's surface has mountains and oceans d) the moon's surface is exactly like Earth's surface
47. ### Chemistry

In planning to administer a gaseous anesthetic to a patient, a. Why must the anesthesiologist take into account the fact that during surgery the gaseous anesthetic is used both at room (18 degrees C) and the patient's body temperature (37 degrees C)? The warmer the temperature...
48. ### government

all treaties must be approved by a two thirds vote of a. the senate b. the house c. both houses of congress d. the supreme court a.
49. ### the novel

In The Call of the Wild, what valiant, tragic figure among the dogs must finally be put down for the good of the lives of the team?
50. ### English

Which type of appeal focuses on the premise that something must be done? a. Sentimental b. Bandwagon c. False Authority d. Ethical I think it's b. Any help would be great.
51. ### Geometry-PSSA Practice

Which of the following quadrilaterals must have diagonals that bisect each other? Rectangle Parallelogram Rhombus Isosceles Trapezoid
52. ### College Chemistry

Why must we add sodium bicarbonate (NaHCO3) to DCPIP/DPIP indicator (Dichlorophenol indophenol)when titrating juice for Vitamin C?
53. ### algebra

How do I define a variable and write an inequality to model the following situation? The temperature in a refrigerated truck must be kept at or below 38Deg F
54. ### english I

Combine together the following pairs of sentences by using infinitives:- 1.You must part with your purse.On this condition only you can save your life. 2.
55. ### Child Care

To succeed,a parent-caregiver relationship must be baed on mutual A.trust B.wariness C.doubt D.ability I chose A as my answer.
56. ### MATH PUZZLE

There are four number 3 . 3 . 8 . 8. You can (only and must) use all the following rules + - / × And your final ANS should be 24! Can you figure this out??
57. ### THE NOVEL

The Call of the Wild, what valiant, tragic figure among the dogs must finally be put down for the good of the lives of the team
58. ### Research Writing

What must you do to convert the annotated bibligraphy to na APA-formatted referemce page as part of the rough draft of your reserach paper?
59. ### Mass Communication Studies

What legal issues must be considered when digitally manipulating images downloaded from the Internet for use in a new book?
60. ### English

Why is this phrase considered to contain a pronoun-antecedent agreement with indefinite pronouns? "Each of the applicants must submit their completed forms to the interviewer."
61. ### physics

Is this a trick question? In order to move a heavy object you must push against it with a larger force than it pushes on you. Is this true or false?
62. ### Math Word Problem

There are 10 members on a board of directors. If they must elect a chairperson, a secretary, and a treasurer, how many different slates of candidates are possible?
63. ### science

what happens to the population of butterflies after a predator comes through? answer must include the words, gene and natural selection
64. ### physics

How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 95-m at a speed of 80 km/h.
65. ### Language Arts

Analogy help for my daughter please... Wouldn't is to coulnd't as green is to what??? The answer must start with scr, spr, str, or thr. Thank you
66. ### physics help

Assuming a typical efficiency for energy use by the body, how many slices of pizza must you eat to walk for 3.0 hr at a speed of 5.0 km/hr ? (Assume your mass is 68 kg).
67. ### college physics

How fast (in rpm) must a centrifuge rotate if a particle 9.50 cm from the axis of rotation is to experience an acceleration of 113000 g's? Need help please.
68. ### Physics- Lenses

A planoconvex lens is to have a focal length of 28.5 cm. If made from fused quartz, what must be the radius of curvature of the convex surface?
69. ### Comm/215

When a police officer fires his gun, he must fill out a lot of paperwork. Correct pronoun errors? I don't see any.
70. ### Chemistry

Between which two orbits of the Bohr hydrogen atom must an electron fall to produce light of wavelength 434.2nm?
71. ### physics

How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 89 at a speed of 93 ?
72. ### chemistry

Can someone help me with this question? what two conditions must be met by a thermochemical equation so that its standard enthalpy change can be given the symbol delta Hf?
73. ### College Chemistry

How fast must a 138 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with = 100. pm?

Tom had scores of 78, 88, 94 and 79 on his first four science tests. What must he score on the next test to have an average of 88?
75. ### Chemistry

How many grams of sodium carbonate must be added to 2.50 kg of water in order to lower the freezing point of the resulting solution to 258 Kelvin?
76. ### Chemistry

If you have Hydrochloric acid, how many grams of aluminum must you use to produce 57.0 L of hydrogen at STP? 2Al(s)+6HCl(aq) --> 3H2(g)+2AlCl3(aq)
77. ### chemistry

How many moles of antifreeze (a molecular substance) must be added per liter of water to protect the cooling system of a motocar to -30 degrees F.
78. ### physics

if a ball is thrown vertically upward and is caught 5 seconds,how fast must have been going when it left the person s hand?help
79. ### maths

how much must i deposit today so that i can have 4700 in tow years time if the bank pays 5% compound interest yearly
80. ### physics

A loaded truck can accelerate at 6.4 m/s^2. It loses its load so that it is only 0.9 as massive. By what factor must the acceleration change for the same driving force?
81. ### physics

A loaded truck can accelerate at 6.4 m/s^2. It loses its load so that it is only 0.9 as massive. By what factor must the acceleration change for the same driving force?
82. ### lit

Ms. Sardelis said we must "absolutely and without delay" turn in our permission slips by tomorrow or we can't go on the class trip. is this correct
83. ### hum/176

Write a 500- to 550-word essay response for Part One. Comprehensive writing skills must be used.
84. ### physics

the 3 lb block A rests on a surface for which the coefficient of kinetic is Mk=.30 determine the distance the 8-lb cylinder B must descend so that A has a speed of Va = 5ft/s starting from rest.
85. ### MATHS

Does there exist a five digit number abcde such that it is equal to the sum of the cubes of its digits a^3+b^3+c^3+d^3+e^3??? Must have detailed answers.
86. ### chem

a cyclist rides a bicycle at an average speed 24 miles per hour. If she wants to bike 195km, how long (in hours) must she ride.
87. ### College Chemistry

Write formation reactions for the following. (You must include the states of matter for each atom or compound) A. Ca(NO3)2 (s) B. CH3OH (l) C. NaClO4(s)
88. ### chemistry

calculate the mass of solid NaCl that must be added to 1.5L of 0.100M AgNO3 solution to precipitate all the Ag+ ions in the form of AgCl?
89. ### physics

a toaster draws a current of 13.0A and has an electric potential difference of 120.V. For how long must it remain on to use 2.0x10^5J of electrical energy?
90. ### Physics

Eighty calories must be added to one gram of ice at 0ºC to melt it. What is the approximate mechanical equivalent of this amount of energy?
91. ### Math

This is the error message I see, how do I fix this: listarray:argument must be an array;found:b--anerror.2 debug this try: debugmode(true)
92. ### Chemistry

How many grams of nickel (II) chloride must be added to 1.50 L of a 0.500 M sodium sulfide solution to precipitate out all of the product of interest?
93. ### astronomy

How fast must a spacecraft travel to reach the center of our Galaxy (26,000 ly away) in 100 tears "ship time"?
94. ### Science, Chenistry

If you have a tank containing 10,000L of water. what weight of CaSO4.H2O must be added to math the Ca+ concentration of 130ppm
95. ### Physics

How large must the coefficient of static friction be between the tires and the road if a car is to round a level curve of radius 85 m at a speed of 95 km/h?
96. ### physics

You want to design a curve, with a radius of curvature of 35.0 m, so that a car can turn at a velocity of 15 m/s on it without depending on friction. At what angle must the road be banked?
97. ### Physics

Where must an object be placed to have a magniﬁcation of 3.74 in front of a converging lens of focal length 14.1 cm? Answer in units of cm
98. ### Chemistry

Calculate the mass of lithium hydroxide that must be added to 50ml of water so that it may react exactly with 5ml solution of 1.5M nitric acid.
99. ### Chemistry

Calculate the mass of lithium hydroxide that must be added to 50ml of water so that it may react exactly with 5ml solution of 1.5M nitric acid.
100. ### Chemistry

Calculate the mass of lithium hydroxide that must be added to 50ml of water so that it may react exactly with 5ml solution of 1.5M nitric acid.