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

9,298 results, page 11
1. physics

A point charge 5 micro couloumb is at the centre of a cubical gaussian surface 100cm on edge. Calculate the electric flux through the surface.
2. physics

3 identical charges each having charge 10 coulomb are placed at the corners of an equilateral triangle of side 20cm find the electric field at the centre of triangle
3. Geometry

Two parallel chords lies on opposite sides of the centre of a circle of radius 13cm. Their length are 10cm and 24cm what is the distance between the chords
4. Physics

A thin uniform rod of length 2m is bent at 90 degree angle from the mid point . find the centre of mass of bent road
5. mathematics

two parallel chord lie in opposite sides of the centre of a circle of radius 13cm. their lengths are 10cm and 24cm.what is the distance between the chord.
6. maths (sets)

32 candidates took examinations at centre. 11 took french,9 took spanish and x took both,18 took neither subject 1.Write an expression in x for the number of candidates in the universal set 2.Calculate the value of x
7. geometry

Two parallel chords lie on opposite sides of the centre of a circle of radius 13cm.their lengths are 10cm and 24cm.what is the distance between the chords?
8. geometry

Two parallel chords lie on opposite sides of the centre of a circle of radius 13cm.their lengths are 10cm and 24cm.what is the distance between the chords?
9. Physics

Three particles X, Y, and Z of masses 2 kg, 5 kg, and 4 kg respectively are arranged in order along a straight line. Y is 5.0 m from X and 7.0 m from Z. The distance of the centre of mass of the system of mass from X is? ANS: 6.6 m Help please? I don't
10. briggs

A point charge 5 micro couloumb is at the centre of a cubical gaussian surface 100cm on edge. Calculate the electric flux through the surface.
11. Physics

A 5.0 amp current flows through a 0.20m long solenoid with 1500 loops What are the magnitude and direction of the magnetic field at the centre of the solenoid?
12. math

two parallel chords lie on opposite sides of the centre of a circle of radius 13cm.their lengths are 10cm and 24cm. what is the distance between the chords
13. science

how do jupiter's moons stay in orbit around jupiter They rotate around jupiter. If you rotate around an object you are accelerating toward it, even though the distance can stay the same. This so-called centripetal acceleration multiplied by the mass must
14. physics

Find the rotational kinetic energy of the earth about the sun due to its orbit about the sun. The mass of the earth M is 6 x 1024 kg, the orbital radius r is 1.5 x 1011 m and the rotational period T is 1 year. Treat the earth as a point mass in this
15. physics

Find the rotational kinetic energy of the earth about the sun due to its orbit about the sun. The mass of the earth M is 6 x 1024 kg, the orbital radius r is 1.5 x 1011 m and the rotational period T is 1 year. Treat the earth as a point mass in this

Calculate the magnitudes of the gravitational forces exerted on the Moon by the Sun and by the Earth when the two forces are in direct competition, that is, when the Sun, Moon and Earth are aligned with the Moon between the Sun and the Earth. This
17. Physics/Nautical Mile

My previous posts have dramatically improved my understanding of how a NM is derived but other questions have been raised: In most books entitled "Pass your Day Skipper" or "Yachtmaster" or similar nautical/navigational publications Latitude is described
18. physics

Astonomers discover a new planet orbiting a fixed point in space, but for reasons unknown, they can't directly observe a star where one is expected. The radius of the orbit is measured to be 1.85 x 10^8 km, and the lone planet completes an orbit once every

The earth's magnetic field a) is slightly off centre compared to the Earth's rotational axis of rotation b) has its magnetic south pole at the geographic north pole c) attracts the north end of the compass needle to the geographic north pole d) all of the
20. physics

A charge of 16.0 nC is uniformly distributed along a thin, flexible rod of length 31.0 cm. The rod is then bent into a semicircle, evaluate the electric field strength from the centre
21. physics

two small kids weighing 10kg and 15kg are trying to balance on a seesaw of total length 5 m with the fulcrum at the centre. if one of the kids is sitting at an end where should the other sit?
22. mathematics

two parallel chords lie on opposite sides of the centre of a circle of radius 13cm.thir lengths are 1ocm and 24cm.what is the distance between the chords
23. Maths

Find the equation, Centre, vertices, co-vertices, foci, equations of assymptotes and eccentricity of the hyperbola traced by the points that moves so that the differences of its distance from (-4,4) and (-4,6) is 6.
24. physics

a ladder AP of length 5m inclined to a vertical wall is slipping over a horizontal surface with velocity 2m/s , when A is at a distance 3m from ground . what is the velocity of centre of mass at this moment?
25. physics

a ladder AP of length 5m inclined to a vertical wall is slipping over a horizontal surface with velocity 2m/s , when A is at a distance 3m from ground . what is the velocity of centre of mass at this moment?
26. physics

The moment of inertia of thin uniform rod of mass i and length L about an axis passing through a point midway between the centre and on end perpendicular to its length is --------------
27. physics

the moment of inertia of a thin uniform rod of mass M and length L about an axis passing through a point midway between the centre and one end perpendicular to its length is -----------------------------------
28. Maths

Find the equation, Centre, vertices, co-vertices, foci, equations of assymptotes and eccentricity of the hyperbola traced by the points that moves so that the differences of its distance from (-4,4) and (-4,6) is 6.
29. physics # 6

6. Which object listed below is not accelerating? a.) A person standing on the surface of the Earth. b.) A satellite in geostationary orbit. c.) A jet traveling at Mach 6.7 in a straight line. d.) A child standing on a merry-go-round. e.) A block
30. physics....

1) Yellow light that has a wavelength of 560 nm passes through two narrow slits that are 0.300 mm apart. An interference pattern is produced on a screen 160 cm distant. What is the location of the first-order maximum? 2) A communication satellite is
31. physics

The hydrogen atom consists of a proton with an electron in orbit about the proton. The laws of quantum mechanics determine that the radius of this orbit is 5.29x10^-11 meters. Therefore, calculate a) The electric potential the electron experiences. b) The
32. Math help plz??

24. A radio signal travels at 3.00 x 10^8 meters per second. How many seconds will it take for a radio signal to travel from a satellite to the surface of Earth if the satellite is orbiting at a height of 3.54 x 10^7 meters? im guessing its 118 seconds but
33. Physics help

1. The fundamental force that: (4 marks) ____ 1. causes hair to stand on end after being rubbed by a balloon a) strong nuclear ____ 2. causes protons to remain in the nucleus despite repulsive forces b) weak nuclear ____ 3. controls the planets' orbit
34. Astronomy

What do you need to know in order to calculate the mass of a planet from observations of a satellite in orbit around that planet?
35. third side (picture attached)

I have already asked this in another thread. Here is more explanation: The radius of earth's orbit is 1.5 * 10^8km & the radius of venus's orbit is 1.1 * 10^8 km. We need to find out the distance from earth to venus for both positions of venus. A picture
36. physics

The Earth orbits the Sun once per year.What is the centripetal force keeping the Earth in orbit? T = 1 year (convert to seconds) r = 1.5e+11 meters m = 6e+24 kg
37. Physical Science

If a vehicle circled Earth at a distance equal to the Earth-Moon distance, how long would it take to make a complete orbit?
38. physics

every year the earth travels on its orbit about the sun. What is earth average speed in m/s, taken that the average orbital radius in 93,200,000 miles
39. physics

mass of planet is half that of earth and radius of planet is one fourth that of earth if we plan to send an artificial satellite from planet the escape velocity will be in km/s
40. physics

the polar-orbiting environmental satellites (POES) and some military satellites orbit at a much lower level in order to obtain more detailed information. POES complete an Earth orbit 14.1 times per day. What are the orbital speed and the altitude of POES?
41. Dynamics

True or false (Each question carries 1 marks) (i) A rigid body is an idealization of the behavior of a body. (ii) A Geo-stationary satellite follows a circular orbit at a unique and has a time period of 24h. (iii) Constancy of areal velocity for a central
42. Physics

How would the speed of Earth’s orbit around the sun change if Earth’s distance from the sun increased by 4 times?
43. Physics

Whats the period of greg's golf ball in orbit in minutes? Mass of earth is 6.0 x 10^24 kg. and its radius is 6.0 x 10^6 m. (Greg hits a golf ball and says "that gotta be the lowest orbit on record".)
44. French(Again)

do these make sense? 1. Aller a un centre commercial ou un cafe. 2. Ils aller au cineama et faire des videos. 3. Jouer au tennis wet nager.
45. physics

You are working at a garden centre for the summer. You lift a bag of fertilizer with a force of 143 N, and it moves upward with an acceleration of 0.762 m/s2. a: how much does the fertilizer back weigh?
46. math

The Moon orbits Earth every 27.3 days. Determine the angular velocity of the Moon, in degrees per day and in radians per day. The radius of the orbit of the Moon is about 384 400 km. How far does the Moon move along an arc of it's orbit every?
47. PHYSICS

Io is a satellite in Jupiter. The radius of its orbit is 422000 km. Its period is 1.77 days. Calculate the mass of Jupiter.
48. physics

A space shuttle orbiting Earth at an altitude of 295 km completes an orbit in 90.0 min. Calculate its acceleration and compare it to the acceleration at Earth’s surface.
49. physics

suppose the moon were held in its orbit not by gravitational interaction with the Earth but by a long, mass-less cable attached to the center of the earth. What would be the tension in the cable?
50. physics

the moon orbits the earth in a circle (near enough) of radious 3.8x10^8 m, taking 27.3 days to make a complete orbit. what is the speed of the moon relative to the earth?
51. physics

The Hubble Space Telescope orbits Earth 621 km above Earth's surface. What is the period of the telescope's orbit? Give answer with 5 significant figures.
52. Astro-Physics(Binary Star System)

In a binary star system in which 2 stars orbit each other about their centre of mass, the mass of one star is 20m while the other star is m. In another binary star system, the masses of the star are 14m and m. The fixed distance between the stars in the
53. geometry

In Triangle ABC ortho centre is O.if angle BAC=85 and angle BCA=75.Find the angle OAC
54. mathematics

A chord of a circle is 9cm. If its distance from the centre of the circle is 5cm,calculate the radius of the circle
55. mATHS

TA and TB are tangents and 0 is the centre.Angle CAD =x,find in terms of x(i)angle OBA(ii)angle CPB.
56. maths

Given that the equation of the circle is x^2 + y^2 +2x -8y+5 =0 (i)Find the centre and radius of the circle (ii)Determine whether the line x-3y=8 is tangent to the given circle
57. maths

Given that the equation of the circle is x^2+y^2+2x-8y+5=0 (i)find the centre and radius of the circle (ii)Determine whether the line x-3y=8 is tangent to the given circle
58. math

ab and ac are tangents to a circle with centre o. if angle bac is equal to 40 degree, find angle abc and angle acb.
59. Electromagnetic spectrum

Some astronomical objects emit no visible light but are known through (blank?) and radio images; satellite observations (blank?) Earth's atmosphere help scientists study space at wavelengths that do not reach Earth's surface?
60. math

A rocket is stopped 12 feet from a satellite when it begings accelerating away from the satellite at a constant rate of 12 feet per second. The distance between the rocket and the satellite is given by the polynormial P(t)= 6t^2+12. Find the distance
61. math

On average, the earth is 93 million miles away from the center of the sun. The complete revolution around the sun takes 1 year. how fast is the earth moving in this orbit in feet per second?
62. math

) RSTU is a cyclic quadrilateral in a circle of centre O.If RUT is 40°, what are the two values of <ROT (convex and concave)? (b) A RHC has a triangular catchment’s area PQR such that PQ = 22.1Km; PR = 13.5Km and <RPQ =56°. Find <PRQ.
63. math

(a) RSTU is a cyclic quadrilateral in a circle of centre O.If RUT is 40°, what are the two values of <ROT (convex and concave)? (b) A RHC has a triangular catchment’s area PQR such that PQ = 22.1Km; PR = 13.5Km and <RPQ =56°. Find <PRQ.
64. Maths

Find the length of an arc of a circle of radius 5.6cm which subtends an angle of 60°at the centre of the circle of the circle take pie 22 divided by 7
65. Physics

Calculate the speed needed by a spacecraft to maintain a circular orbit at about 350 km above Earth’s surface. (it's a project where we create our own spaceship. let's say the craft is 500kg) --- Not sure about the formula to find this. All I know is
66. Physics

On July 19, 1969, Apollo II's orbit around the moon was adjusted to an average orbit of 111km. The radius of the moon is 1785 km and the mass of the moon is 7.3e22 kg. a) How many minutes did it take to orbit once? b) At what velocity did it orbit the
67. science

two balls of masses 5m and m have radii 2r and r.their center of masses are separated by 10r.they move towards each other under their gravitational force. the distance moved by the centre of smaller sphere when the sheres touch each other?
68. science

locate the position of the centre of mass of a system of particles of mass m1=1kg,m2=2kg and m3=3kg situated at the corner of an equilateral triangle of angle 60degres and side 1m
69. Physics

Consider the earth following its nearly circular orbit about the sun. The earth has mass 5.98*10^24 and the sun has mass 1.99*10^30. They are separated, center to center, by r=150 million k. What is the size of the gravitational force acting on the earth
70. help physics

the earth (mass=5.98x10^24kg) rotates around the sun in a orbit that is approximately circular, with a radius of 1.5x10^11m find the orbital speed of the earth around the sun
71. physics

the earth (mass=5.98x10^24kg) rotates around the sun in a orbit that is approximately circular, with a radius of 1.5x10^11m find the orbital speed of the earth around the sun
72. Physics

Consider the earth following its nearly circular orbit (dashed curve) about the sun.(Figure 2) The earth has mass mearth=5.98×1024kg and the sun has mass msun=1.99×1030kg. They are separated, center to center, by r=93millionmiles=150millionkm. What is
73. Algebra URGENT! Conic sections

A spacecraft is in a circular orbit 150 kilometers above Earth. Once it attains the velocity needed to escape the Earth's gravity, the spacecraft will follow a parabolic path with the center of Earth as focus. Suppose the spacecraft reaches escape velocity
74. Math

The distance, "d", to the horizon (= farthest point on the earth still visible) for an object that is "h" miles above the surface of the earth is given the formula d = the square root of 8000h +h^2. Determine how many miles above the surface of the earth
75. problem solving

Given that • The distance from the earth to the sun is 1.5*10^11m, and • The mass of the sun is 1.9 *10^30 kg , 1. use Kepler’s Law of Periods to find the period of the earth’s orbit, recorded in seconds:; 2. show how to express your answer in
76. Astronomy

The Hubble Space Telescope orbits at an altitude of 600 km above the Earth's surface. Assuming it is in a stable circular orbit, what is its velocity? For reference, the Earth's radius is 6400 km and Earth's mass is 6 x 10^24 kg. The formula to solve for
77. Geometry

A circle has a centre at (3,5). The point (3,8) is on the circle. What is the circumference of the circle to the nearest tenth?
78. Geometry

A circle has a centre at (3,5). The point (3,8) is on the circle. What is the circumference of the circle to the nearest tenth?
79. Motion Problems

A satellite which travels around the earth has a power supply that provides power according to the formula: P =(17200)/(t + 100) where t is the number of days the satellite is aloft. Find the rate at which power is decreasing after 380 days. rate in
80. English - Theme

What is the theme of Margaret Atwood's At the Tourist Centre in Boston? I am having a hard time figuring this out. I need to write about the theme of this poem for an essay question.
81. English Literature

What is the tone of the following lines in "At the Tourisy Centre in Boston"? I seem to remember people, at least in the cities, also slush, machines and assorted garbage. Perhaps that was my private mirage which will just evaporate when I go back. a.
82. geometry

You are given a sheet of paper with the following diagram on it. You are also told that the two circles have the same radii and you are given a straight edge. Draw an isosceles triangle. N.B. you do not know where the centre of either circle is, you do not
83. science (physics)

State gauss's theorem draw a graph showing the variation of electric field, as one moves from the centre of charge metal ball to a point on its surface and then to a far off outside point
84. Science

Thank you! Why is there a lunar eclipse only twice a year and not once a month? Thanks for the help. On the night of May 15/16 we will be able to see a total lunar eclipse. Lunar eclipses can only happen when the Moon is full and it passes behind the Earth
85. Math

A satellite which travels around the earth has a power supply that provides power according to the formula: P = 17200/t + 100 where t is the number of days the satellite is aloft. Find the rate at which power is decreasing after 380 days. rate in watts/day
86. Physics 102

THIS IS A QUESTION IN MY PHYSICS BOOK & I REALLY REALLY NEED HELP. I AM 48YRS OF AGE JUST DECIDED TO GO BACK TO SCHOOL AND HONESTLY KNOW NOTHING ABOUT PHYSICS. Two facts: A freely falling object at Earth’s surface drops vertically 5 m in 1 s. Earth’s
87. physics

Given that the Moon's period about the Earth is 27.32 days and the distance from the Earth to the Moon is 3.84*10^8 m estimate the mass of the Earth. Assume the orbit is circular. Why do you suppose your estimate is high? The force of attraction=
88. Science

The electric field due to a charged conducting sphere of radius 10 cm , at a distance of 20 cm from the centre of the sphere is 1.5*10pow3 NC-1 and points radially inwards.what is the charge on the sphere ?
89. MATH

Please help me with these problems. Work and answer is appreciated! :) thanks. 1. Find on the interval theta is greater than or equal to 0 and less than 2pi; then find the general solution: 5tantheta+1=-2.89 16cos^2theta-6=3 6sin^2theta+sintheta=2

Two small spaceships, each with mass m = 2000 kg, are in the circular Earth orbit of the figure, at an altitude h of 450 km. Igor, the commander of one of the ships, arrives at any fixed point in the orbit 90.0 s ahead of Picard, the commander of the other
91. science

The Earth is a satellite of the sun? If not can you tell me what it is?

I've been doing extra questions for physics, but these four are still giving me trouble. Please help me solve them, including Free Body Diagrams if possible. 1. If a curve with a radius of 60m is properly banked for a car traveling at 60km/hr, what must
93. engr

the spacecraft is first put into a circular orbit around Mars. The period of the orbit is 110 minutes. Calculate the altitude of the orbit in km.
94. science

a satellite in force free space sweeps stationary interplanetary dust at a rate of dM/dt=alpha v, where M is mass and v is speed of satellite and alpha is a constant. the tangential acceleration of satellite
95. physics

The planet Jupiter has a satellite, Io, which travels in an orbit of radius 4.220×108 m with a period of 1.77 days. Calculate the mass of Jupiter from this information.
96. math

A field is 225 m long and 175 m wide. It has two roads in its centre of uniform width of 5 m, one parallel to its length and the other parallel to its breadth. Find the cost of levelling the at rupees 3 per square metre
97. Physics

An 60kg athlete wants to jump over a 2 m bar. How fast must she go the moment her foot leaves the ground in order to get her centre of mass up so high? I set KE of jumper to PE at top of bar to get 6.26m/s. Am I on the right track?