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

25,143 results, page 12

### math

A leach free area for dogs is to be created in a field behind a recreation centre. what length of fencing will be required, if the plans show an irregular pentagonal area with vertices at (2,0), (1,6), (8,9), (10,7)and (6,0)?( one unit represents 10m)

### math

a circular dartboard of radius 1 foot is at a distance of 20 feet from you. you throw a dart at it and it hits the dartboard at some point Q in the circle what is the probability that Q closer to the centre of the circle than the periphery a. 0.5 b. 1 c. 0.75 d. 0.25

### physics

when a 0.05kg bullet is fired into a block that is suspended by a long cord so that it can swing as a pendulum. if the block is displaced so that its centre of gravity rises by 0.10m,what was the speed of the bullet?

### physics

A uniformly charged insulating rod of length 19.0 cm is bent into the shape of a semicircle. The rod has a total charge of −8.50 ìC. Find the electric potential at O, the centre of the semicircle.

### physics

A uniformly charged insulating rod of length 19.0 cm is bent into the shape of a semicircle. The rod has a total charge of −8.50 ìC. Find the electric potential at O, the centre of the semicircle.

### MATH

Source: At the end of 1993, scientists tracked 1550 nonfunctional components in orbit and projected 42 such objects are added each year. Suppose that an average of 15 of these are brought back to Earth each year. Question. Let t represent time in years. Write the function D ...

### Physics

The period of Mars' rotation is 24 hours, 37 minutes, and 23 seconds. At what altitude above Mars would a "Mars-stationary" satellite orbit?

### physics

A Titan IV rocket has put your spacecraft in a circular orbit around Earth at an altitude of 230 km. Calculate the force due to gravitational attraction between the Earth and the spacecraft in N if the mass of the spacecraft is 2300 kg.

### Physics please help?????

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 ship. At point P in ...

### algebra--1 question

Radio signals travel at a rate of 3 * 10^8 meters per second. How many seconds would 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 9.6 * 10^6 meters? (1 point) 3.2 x 10^2 seconds 3.2 x 10^-2 seconds 3....

### General Physics

Clarification: this is calculus-based physics, so the methodology is not restricted to trigonometry only. I have two questions, so hopefully I can divide them up nice and evenly. Also, if you know where I should copy and paste proper vector notation from, please tell me so I ...

### math algebra

a diver dives from a cliff .when her centre of gravity is 46 ft above the surface of the water. her initial vertical velocity leaving the water is 9 ft per second. after how many secs does she hit the water? solve

### Physics

The earth orbits the sun once a year (3.16 multiplied by 10^7 s) in a nearly circular orbit radius 1.50 multiplied by 10^11 m. With respect to the sun, determine the following. (a) the angular speed of the earth

### algebra

What is the equation of an ellipse with a center (-4,2) and a horizonal major axis? I know the equation is x^2/a^2+y^2/b^2 and that's all. (Broken Link Removed) you will have to give more information. With only the centre (-4,2) all we can say is (x+4)^2/a^2 + (y-2)^2/b^2 = 1

### al mustafa publick school

two planets of masses m and respectively.have a centre to center separation of r.at what distance from the center of the pianet of mass m do the gravitational force of planets cancel each other???

### physics....

1) Yellow light is incident on a single-slit 0.0315 mm wide. On a screen 70.0 cm away, a dark band appears 13.0 mm from the centre of the bright central band. Calculate the wavelength of the light.

### important maths ques

AB and CD are two parallel chords of a circle such that length of AB and CD are 10 cm and 24cm respectively.if the chords are opposite sides of the centre and the distance between them is 17 cm ,find the radius of the circle.

### 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

### PHYSICS

AN OBJECT OF HEIGHT 5 CM IS PLACED PERPENDICULAR TO THE PRINCIPAL AXIS OF A CONCAVE LENS OF FOCAL LENGTH 10 CM .IF THE DISTANCE OF THE OPTICAL CENTRE OF THE LENS ES 20 CM .DETERMINE THE POSITION ,NATURE AND SIZE OF THE IMAGE FORMED USING THE LES FORMULA.

### 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

### 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

### geometry

whats the Biconditional of "the moon is the largest satellite of Earth"

### geometry

write a biconditional for: the moon is the largest satellite of Earth.

### Mechanics _ physics

A uniform bar 1m long is pivoted at the centre has a mass of 3kg. It is acted upon by a conquer which cause to possess an angular acceleration of 6rad/sec^2; calculate a. The moment of inertia of the bar b. The torque on the bar

### Physics

The region of the solar system between Mars and Jupiter contains many asteroids that orbit the Sun. Consider an asteroid in a circular orbit of radius 3.01 x1011 m. Find the period of the orbit.

### Physics

The region of the solar system between Mars and Jupiter contains many asteroids that orbit the Sun. Consider an asteroid in a circular orbit of radius 4.3 1011 m. Find the period of the orbit.

### physics

The region of the solar system between Mars and Jupiter contains many asteroids that orbit the Sun. Consider an asteroid in a circular orbit of radius 5.7 1011 m. Find the period of the orbit.

### Math

The centre of a doughnut is removed and formed to make a sphere of dough with diameter 2.5 cm. A batch of these spheres is to be covered in a sugar glaze. There is enough glaze to cover an area of 4710 cm^2. How many spheres can be glazed?

### Math

This regular octagon has a side length 15.0cm. Determine the distance from one vertex to the opposite vertex, measured through the centre of the octagon. Give your answer to to the nearest tenth of a centimeter.

### geometry

In a circle with centre P,a chord AB is parallel to a tangent & inersects the radius drawn from a point of contact at the midpoint of the radius .If AB=12,FIND THE RADIUS OF THE CIRCLE.

### Math

One corner of a square is folded to its centre to form an irregular pentagon.the areas of the pentagon and of the square are consecutive integers.what is the area of the square?

### Physics

(a) Determine the amount of work (in joules) that must be done on a 95 kg payload to elevate it to a height of 1007 km above the Earth's surface. 1 ? MJ (b) Determine the amount of additional work that is required to put the payload into circular orbit at this elevation. 2 ? J

### Physics

(a) Determine the amount of work (in joules) that must be done on a 95 kg payload to elevate it to a height of 1007 km above the Earth's surface. 1 ? MJ (b) Determine the amount of additional work that is required to put the payload into circular orbit at this elevation. 2 ? J

### 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

### 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

### math

in a circle of radius 6cm , a chord is drawn 3cm from the circle (a)calculate the angle subtended by the chord at the centre of the circle

### physics

A 78 kg volleyball player jumps and leaves the ground with a vertical velocity of 3.5 m/s. By thinking about the conservation of energy in a freefalling object, work out how high their centre of mass would reach at the top of their jump and present your answer to the nearest ...

### Science

Have I matched the right Scientists with these famous sayings: Scientists: Ptolemy, Kepler, Copernicus, Newton, Galileo, Brahe & Hubble. 1)"I've finally worked out an explanation as to why planets orbit the sun and moons orbit planets. It is gravity that keeps an object in ...

### maths-circles

a circle with centre O, secants AB and EF intersect each other at point C in the exterior of the circle . prove that measure of angle ACE=(1/2)*{measure of arcAE)-measure of arc BF}

### physics

An 76 kg satellite orbits a distant planet with a radius of 4500 km and a period of 280 min. From the radius and period, you calculate the satellite's acceleration to be 0.63 m/s2. What is the gravitational force on the satellite?

### science

A uniform AB 2m long Rod which exerts a downwards force of 60N at its centre is placed on a knife egde support position 0.8m from A determine the vertical downward force required at A to prevent rotation of the Rod.

### Physics

The region of the solar system between Mars and Jupiter contains many asteroids that orbit the Sun. Consider an asteroid in a circular orbit of radius 4.0 1011 m. Find the period of the orbit IN SECONDS!!!???

### Physics 1

The region of the solar system between Mars and Jupiter contains many asteroids that orbit the Sun. Consider an asteroid in a circular orbit of radius 5.8 1011 m. Find the period of the orbit. _____s

### Physics 1

The region of the solar system between Mars and Jupiter contains many asteroids that orbit the Sun. Consider an asteroid in a circular orbit of radius 5.8 1011 m. Find the period of the orbit. _____s

### Gradient of circle?

A circle has the equation x^2+y^2-4x+6y-12=0 and i have already found that the centre has a coordinate of (2,-3), and a radius of 5 units. But i need to find points on the circle that has the gradient of -4/3 when a tangent is drawn on the point. How do i do that???

### Math-Help-please?

Source: At the end of 1993, scientists tracked 1550 nonfunctional components in orbit and projected 42 such objects are added each year. Suppose that an average of 15 of these are brought back to Earth each year. Question. Let t represent time in years. Write the function D ...

### chemistry

If a satellite orbits the earth at a velocity of 3.2 x 10⁶ km/hr, this would be the same as how many ft/s?

### physics

Determine the velocity of a satellite orbiting Earth at a height of 3.2 x 10^3 meters.

### Science

What is the centripetal acceleration a satellite is orbiting the Earth at an altitude of 300.22 km?

### 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 is uploaded here if ...

### Writing Sentences and Paragraphs

As an individual with experience performing office clerical duties and educated as a Library Technician, I am excited to apply for the position of Data Entry Clerk as advertised on the DC Comics website. I consider that my experience and skills match ver well with your ...

### PreCal

On average, the earth in 93 million miles away from the center of the sun. a.) assuming that the earth's orbit is circular, estimate the number of miles our planet travels in one complete revolution around the sun.

### English

In my previous post I forgot to include a question. I'm doubtful about the use of certain expressions I haven't found in my grammar reference book. I hope you can have a look at them. 1) We are leaving from Alba (to Genova or for Genoa) on 23. March at 12.30 am. We are meeting...

### math

the vertices are at (2,1) and (2,7) and focus is at (2,*) write the equation of the hyperbola that meets each set of conditions. Is the asterisk supposed to be an 8? It has to be some number. I will set this up for you later of you respond. The fomulas you need are in most ...

### Physics

(a) Determine the amount of work (in joules) that must be done on a 104 kg payload to elevate it to a height of 993 km above the Earth's surface. ______ MJ (b) Determine the amount of additional work that is required to put the payload into circular orbit at this elevation. ...

### PHYSICS!

Given: G = 6.67259 × 10−11 Nm2/kg2 The acceleration of gravity on the surface of a planet of radius R = 3430 km is 4.43 m/s2.What is the period T of a satellite in circular orbit h = 7683.2 km above the surface? Answer in units of s

### Phyics

Given: G = 6.67259 × 10−11 Nm2/kg2 The acceleration of gravity on the surface of a planet of radius R = 3430 km is 4.43 m/s2.What is the period T of a satellite in circular orbit h = 7683.2 km above the surface? Answer in units of s

### 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 around the sun c) ...

### physics

An asteroid, whose mass is 2.0 10-4 times the mass of Earth, revolves in a circular orbit around the Sun at a distance that is 2.9 times Earth's distance from the Sun. (a) Calculate the period of revolution of the asteroid in years. (b) What is the ratio of the kinetic energy ...

### Science

Does Earth rotate or orbit each day?

### Mechanics

A 500kg spaceship is in a circular orbit of radius 2Re above the earth a.how much energy is required to transfer the spaceship to a circular orbit of radius 4Re. b.discuss the change in potential energy,kinetic energy and the total energy of the system

### Co-ordinate

The line is 2x-Y+1=0 is tangent to the circle at thf point (2,5).and the centre of the circle is on the line x+y=9 find the equastion of the circle.

### math

Prove that if a triangle is inscribed in a circle,the sides of a triangle are equidistant from the centre of the circle then the triangle is equilateral

### math

a leach-free area for dogs is to be created in a field behind a recreation centre. what length of fencing will be required, if the plans show an irregular pentagonal area with vertices at (2,0), (1,6), (8,9), (10,7), and (6,0)?( one unit represents 10m). pls i really need help

### physics

A uniform rectangular marble slab is 3.4m and 2.0m wide.it has a mass of 180kg.its originally lying on surface flat ground with It's 3.4m*2.0m surface facing up.How much work is needed to stand it on It's short end?(hint,think about its centre of gravity)

### Engineering science

a roller of diameter 1.5 m has a mass of 450 kg; it is pulled by a handle attached to its centre. Find the minimum force to pull up a step which is 250 mm high if the roller handle makes an angle of 30o with the horizontal

### math

A cylindrical metal radius 7cm and height 15cm has its centre drilled with a hole of 5cm in cross-section. If 152cm(cube) of d metal weight 125kg, what is the weight of d hallowed cylinder? How do I solve this please?

### physics

the earthis moving around the sun in a circular orbit of radius 1.5*10^11. it makes one revolution per year.find the angular speed of earth in radian/sec, and the tangential speed of earth using the formula v=r.w , and tangetial speed ?

### Physics

A 500-kg disk-shaped nonrotating satellite gets hit by a 5-g piece of space debris moving at 1 km/s. If the debris buries itself near the satellite’s rim, how rapidly will the satellite rotate after the hit?

### Physics

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 above 2. A magnetic ...

### 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 costheta=.84 2tanx=7 2.Find ...

### 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?

### Physics

Halley’s comet orbits the Sun with a period of 76.2 years. a) Find the semi-major axis of the orbit of Halley’s comet in astronomical units (1 AU is equal to the semi-major axis of the Earth’s orbit).

### Physics

Halley’s comet orbits the Sun with a period of 76.2 years. a) Find the semi-major axis of the orbit of Halley’s comet in astronomical units (1 AU is equal to the semi-major axis of the Earth’s orbit

### college

find an approxiamte value for the rate at which the moon orbits the earth. Assume that the moon's orbit is circular. the distance between the moon and earth is 382,000,000 meters.

### Physics

A 350-kg disk-shaped non-rotating satellite gets hit by a 5-g piece of space debris moving at 1.5 km/s. If the debris buries itself near the satellite’s rim, how rapidly will the satellite rotate after the hit?

### Physics

When you drop a 0.27-kg apple, Earth exerts a force on it that accelerates it at 9.8 m/s2 toward Earth's surface. According to Newton's third law, the apple must exert an equal and opposite reaction force on Earth. If the mass of Earth is 5.98 1024 kg, what would be the ...

### 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?

### physics

A cricket pitch roller of diameter 1.5 m has a mass of 450 kg; it is pulled by a handle attached to its centre. Find the minimum force to pull up a step which is 250 mm high if the roller handle makes an angle of 30o with the horizontal.

### Physics

The period of revolution of a satellite is 90min. What is the altitude above the surface of the earth?

### chemistry

If a satellite orbits the earth at a velocity of 2.9 x 103 km/hr, this would be the same as how many in/sec?

### physics

A DVD is spinning at constant velocity. Compare and contrast the accelection of point A at the rim of the DVD and point B halfway between the centre and the rim.

### Government senior college ikoyi

An equilateral triangle of side 20cm is inscribed in a circle.calculate the distances of a side of the triangle from the centre of the circle.

### math

A roll of paper towels has a radius of 12 cm and a height of 18 cm. the cardboard tube in the centre has a radius of 5cm. Find the volume of the paper towels So would I do 18-12?

### Cranborne

In the diagram AOBP is the major sector of a circle centre O.BO=8cm, AOB=156° and the sector is bent to form a right cone. a)Caculate the radius of the cone b)Calculate the vertical angle of the cone

### Physics

A neutral solid conducting sphere of radius R has charge Q deposited in it, and is sitting at the centre of a conducting shell of inner radius 2R and outer radius 3R. After the conductor reaches equilibrium, find the potential at R<r<2R at r=R, and at r=R/2, and r=5/2R.

### Geometry and algebra

A rectangle wother does 12 and 16 cm is inscribed in a circle with centre of.a dart is thrown and lands in the interior of circle what is its probability of dart that lands in the shaded region

### ellipse

Write the equation of ellipse that satisfy the following condition A)centre at c(-2,3),one focus is f(-2,7) and one vertex is v(-2,10). B) centr at c(-1,2) focus at F(-1,5) and passes through point P(5,6).

### physics/biomechanics

1. Once a person is in the air during a jump can they modify their path in the air of: a) their head b) Their whole body centre of gravity c) their hip joint (yes or no) 2. To achieve peak horizontal distance on flat ground, what should the angle of take off be?

### physics/biomechanics

1. Once a person is in the air during a jump can they modify their path in the air of: a) their head b) Their whole body centre of gravity c) their hip joint (yes or no) 2. To achieve peak horizontal distance on flat ground, what should the angle of take off be?

### physics

Satellite A orbits a planet with a speed of 10,000 m/s. Satellite B is twice as massive as satellite A and orbits at twice the distance from the center of the planet. What is Satellite B's speed?

### math

when a cross tile is placed on a number chart, the number covered by the centre square is the average of all the numbers covered, no matter how large the cross is. Explain why.

### Physics

I'm having trouble setting up/solving this physics problem? Can someone please help me? Thank you. A 4700 kg lunar lander is in orbit 45 km above the surface of the moon. It needs to move out to a 340-km-high orbit in order to link up with the mother ship that will take the ...

### Physics

Astronomers can calculate the mass of a planet by using the orbital parameters of one of its moons. Consider a hypothetical planet, which has a hypothetical moon that orbits the planet in a roughly circular orbit with a radius of 3.95*10^8 m. The moon takes 12 Earth days to ...

### Kinesiology

what is the torque generated to hold a 60N dumbell at 90 degrees? The dumbell is 0.6m from the shoulder, the centre of the mass of arm weighs 30N and is .25m from the shoulder, the moment arm is 0.05m?

### Physics

Finding a Lunar lander's Thrust? A 6000kg lunar lander is in orbit 50km above the surface of the moon. It needs to move out to a 200km -high orbit in order to link up with the mother ship that will take the astronauts home. How much work must the thrusters do in joules?

### physics

The International Space Station, launched in November 1998, makes 15.65 revolutions around the earth each day in a circular orbit. Apply Newton's second law to the space station and find its height (in kilometers) above the earth's surface.

### trig

The ferris wheel in an amusement park. It has a diameter of 24m, and it takes 40s to make one complete revolution. If Peter gets on a gondola which is vertically below the centre of the ferris wheel, find his rise in the height after 5s.

### Calculus

Along reservoir has the shape of a right circular cone having a radius of 40m at the top and a height of 10m at the centre. it is being filled at a constant rate of 40 m^3/min.Find the rate at which the water level is rising when the height is 5m?