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

25,380 results, page 14

### physics

Show that the kinetic energy of two particles with mass m1 and m2 split into the energy of the centre of mass and the kinetic energy of relative motion.

### Physics

In the hydrogen atom the radius of orbit B is sixteen times greater than the radius of orbit A. The total energy of the electron in orbit A is -0.378 eV. What is the total energy of the electron in orbit B?

### Physics

When a spacecraft travels from the Earth to the Moon, both the Earth and the Moon exert a gravitational force on the spacecraft. Eventually, the spacecraft reaches a point where the Moon's gravitational attraction overcomes the Earth's gravity. How far from the Earth's surface...

### physics- please help me!

Earth turns on its axis approximately once every 24 hours. The radius of Earth is 6.38 X 10^6 m. a.) If some astronomical catastrophe suddenly brought Earth to a screeching halt (a physical impossibility as far as we know), with what speed would Earth's inhabitants who live at...

### Physics

Consider the current-carrying wires in the figure. I can try to describe the figure here.. - Diagram A has the wire coming from the left, it forms a loop in the centre in a clockwise direction and leaves going to the right. - Diagram B has the wire also coming from the left, ...

### optics in physics

acorridor is lighted by 4 lamps s10cm apart and suspended at a height of 5m above the centre of the floor. if each lamp gives 200cp in all directions below the horinzontal, find the illumination at the point on the floor mid-way between the second and third lamps

### maths/physics

PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?

### maths/physics

PLEASE HELP! A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?

### Physics Number 3 (Online w/ no teacher)

Many people mistakenly believe that the astronauts that orbit the Earth are “above gravity.” Calculate g for space-shuttle territory, 200 kilometers above the Earth’s surface. Earths’ mass is 6 X 10 to the 24th and its radius is 6.38 X 10 to the 6th (6380 km). Your ...

### engineering

b) The crank OA of a mechanism, as shown in the figure, rotates clockwise at 120 r.p.m. The lengths of various links are OA = 100 mm ; AB = 500 m ; AC = 100 mm and CD = 750 mm. Find by instantaneous centre method: 1. Velocity of point C. 2. Velocity of slider D. 3. Angular ...

### Science Check answers

2) What phenomenon naturally warms Earth's lower atmosphere and surface? • the formation of sunspots • changes in the shape of Earth's orbit • global warming (MY ANSWER) • the greenhouse effect 3) Which of the following is an example of human impact on climate changes...

### SCIENCE

HOW COULD MEASURING THE ORBIT OF A COMET HELP SCIENTISTS UNDERSTAND WHEN IT WILL NEXT BE VISIBLE FROM EARTH?

### science

HOW COULD MEASURING THE ORBIT OF A COMET HELP SCIENTISTS UNDERSTAND WHEN IT WILL NEXT BE VISIBLE FROM EARTH?

### space

How could measuring the orbit of a comet help scientists understand when it will next be visible from Earth?

### physics

a satelitee breaks in half while in circular orbit about the earth

### Science

how could measuring the orbit of a comet help scientist understand when it will next be visible from earth

### science

What would be the effect on satellites now in orbit if the earth stopped rotating

### scientist

How could measuring the orbit of a comet help scientists understand when it will next be visible from earth

### science

how could measuring the orbit of a comet help scientists understand when it will next be visible from earth

### science

How could measuring the orbit of a comet help scientists understand when it will next be visible from earth?

### scientist

how could measuring the orbit of a comet help scientists understand when it will next be visible on Earth?

### maths

find the radius of the circle if length of arc is 4p cm and angle made by the arc at the centre is 40 deg.find the area made by the arc.

### Physics please help

Geosynchronous satellites orbit the Earth at an altitude of about 3.58×10^7 m. Given that the Earth's radius is 6.38×10^6 m and its mass is 5.97×10^24 kg, what is the magnitude of the gravitational acceleration at the altitude of one of these satellites? Please explain as ...

### Straight Lines

From each corner of a parallelogram a perpendicular is drawn upon the diagonal which does not pass through that corner and these are produced to form another parallelogram, show that its diagonals are perpendicular to the sides of the first parallelogram and that they both ...

### OPTICS/PHYSICS-REALLY DO NOT UNDERSTAND THIS!

A POINT SOURCE OF LIGHT IS PLACED 50 CM ABOVE A CIRCULAR CARD OF DIAMETER 5CM, THE SOURCE BEING DIRECTLY ABOVE THE CENTRE OF THE CARD. WHAT IS THE AREA OF THE SHADOW ON THE FLOOR 70 CM BELOW THE CARD?

### 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 that it may have ...

### physics grade 11 one word term

one word/term. 1.3.The minimum amount of energy required to start a reaction. 1.4.The distance between the centre of a lens and its focal point. 1.5. The type of image formed on a screen when light rays converge.

### math

How much % above the cost price should a shopkeeper mark his good so that after allowing a discount of 10%, he should gain 26%? The diameter of a circle is 10cm. If the distance of a chord from the centre of the circle be 4cm then , find the length of the chord. Pls hlp!

### Physics

A light, rigid rod 1.039m in length joins two particles with masses 3.65kg and 4.94kg at its ends. The combination rotates in the xy plane about a pivot through the centre of the rod. Determine the angular momentum of the system about the origin when the speed of each particle...

### college student

Two spheres of mass 2 kg and 3 kg are attached to the ends of a light rigid rod of length 1.0 m. What is the moment of inertia of the system about an axis perpendicular to the rod and (i) passes through the centre of the rod (ii) passes through the 2 kg sphere

### Motion

A body weighing 150 N, moves with simple harmonic motion. The velocity and acceleration of the body when it is 200 mm from the centre of oscillation, are 5 m/s and 20 m/s2 respectively.Determine (a) amplitude of motion ,no. of vibrations per minute, Periodic time and angular ...

### Physics (please help!!!!)

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 alignment corresponds to a ...

### physics

A coin placed on a rotating turn table just slips if it is at a distance of 40cm from the centre if the angular velocity of the turn table is doubled,it will just slip at a distance of

### physics

Suppose a driver's car needs to travel 46.4 miles in 1.000 hour at a constant speed. If the tires of the car have a rolling radius of 28.4 cm, what will be the period of rotation of each tire? Suppose a moon of a planet in a distant solar system has an average orbital radius ...

### physics

1. (a) How far below an initial straight-line path will a projectile fall in eight seconds? (b) Does your answer depend on the angle of launch or on the initial speed of the projectile? the answer is no. but defend it. 2. Why is it important that a satellite be above Earth's ...

### Maths

A right circular cone is circumscribed about a sphere of radius a .If h is the distance from the centre of the sphere to the vertex of the cone. Show that the volume of the cone is 1/3pi a^2(a+h)^2/(h-a). Find the angle of a cone when the volume is minimum

### math

The locus of a point whose distance from point (0,5) is always 3/4 of its distance from the line Y=8 is an elipse. Find the equation,centre, length of the major axis, length of the minor axis and the foci of the ellipse.

### physics

A block of mass M slides along the smooth wedge mass M.what will be the acceleration of centre of mass of block and wedge system?

### Physics

the distance of a planet from its sun is 19000000 miles. if there are 29400000 seconds in one orbit, find the speed of the planet in its orbit about the sun. (assume a circular orbit)

### relative velocity

A radar antenna is tracking a satellite orbiting the earth. At a certain time, the radar screen shows the satellite to be 159km away. The radar antenna is pointing upward at an angle of 59.3 from the ground.Fine the x and y components(in km) of the position of the satellite ...

### Science

Both comets and planets orbit the sun. How do their orbits differ? Comets orbit elliptically, and planets orbit more circularly. Please correct me if Im wrong, thanks

### Science-Help

Both comets and planets orbit the sun. How do their orbits differ? Comets orbit elliptically, and planets orbit more circularly. Please correct me if Im wrong, thanks

### Earth Science

Is there a direct relationship between the eccentricity of its orbit and the distance a planet is from the sun?

### Physics

Calculate the tangential speed of the earth around the sun (assuming a circular orbit).

### Science

How many times did earth orbit the sun between140ce and 1543, please show work

### Maths

Given that arg((z-1)/(z-2i)) = pi/4 describe the locus of P and sketch this on an argand diagram. Show that the point (1,3) lies on this locus. I know it is an arc subtended from the points (0,2) and (1,0) but I do not know how to find the centre of the circle which I am ...

### Maths

Given that arg((z-1)/(z-2i)) = pi/4 describe the locus of P and sketch this on an argand diagram. Show that the point (1,3) lies on this locus. I know it is an arc subtended from the points (0,2) and (1,0) but I do not know how to find the centre of the circle which I am ...

### Maths

Given that arg((z-1)/(z-2i)) = pi/4 describe the locus of P and sketch this on an argand diagram. Show that the point (1,3) lies on this locus. I know it is an arc subtended from the points (0,2) and (1,0) but I do not know how to find the centre of the circle which I am ...

### Physic

A body weighing 150 N, moves with simple harmonic motion. The velocity and acceleration of the body when it is 200 mm from the centre of oscillation, are 5 m/s and 20 m/s2 respectively.Determine (a) amplitude of motion ,no. of vibrations per minute, Periodic time and angular ...

### physics

A 17.0-kg satellite has a circular orbit with a period of 2.31 h and a radius of 9.10×106 m around a planet of unknown mass. If the magnitude of the gravitational acceleration on the surface of the planet is 8.10 m/s2, what is the radius of the planet? radius = m

### 7th grade science help the solar system Ms. Sue

1. Most likely, ____ were formed when lava from the moon's interior flooded bowl-like regions on the moon's surface. (1 point) maria highlands craters basins 2. Depressions on the moon formed by large meteorites are called ____. (1 point) maria mountains craters highlands 3. ...

### math

The space station is going 17500 mph as it orbits the earth. How long will it take to orbit 1 time if the earths diameter is 7926 miles and the space station orbits at 240 miles above the earth.

### Physics

A. Use the relation 2 m m m GM g R ƒ to find the acceleration due to gravity on the surface of the Moon. You can use the following data: Mass of the Moon m M = 7.35 ¡Ñ 1022 kg. Radius of the Moon m R = 1.74 ¡Ñ 106 m. B. How does this value compare with the acceleration ...

### Physics

A dumbbell consists of two equal compact masses of 2 kg each, connected by a massless rod of length 0.8 metres. What is the moment of inertia of the dumbbell about an axis through the centre of, but perpendicular to, the rod? could someone just tell me how to get started on ...

### English 2

What is the tone of the following lines in "At the Tourist Centre of 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. -embarrassed -ironic -...

### Maths / Physics (uni level)

Say I have a centre of rotation at C(x, y, 1 <= z <= 1.5). I need to define a unit normal vector to this. I know it's a length of 1 and this means there's a sphere of radius 1 at the origin so I can get the beginnings of a spherical coordinate system, but I'm a little ...

### Math

If an object which weighs 100 lbs on the Earth's surface were placed on a planet with 2 times the radius of the Earth and with 7 times the Earth's mass, how much would that object weigh? Enter answer to nearest 0.1 lbs. The term "void ratio" means the ratio of the volume of ...

### math

Triangle XYZ with vertices X(3,-1) Y(7,-3)Z(3,-5) undergoes an enlargement represented by the mapping: (x)--(-0.5 0)(x) +(-3) (y)--( 0 -0.5)(y) +(4) Evaluate: 1. The vertices of the image of triangle XYZ. 2. The centre of enlargement PS. The small brackets should be one big ...

### physics

A pole AB of length 10m and weight 600N has its centre of gravity 4m from the end A, and lies on horizontal fround.calculate the force required to begin to lift the end.why would this force applied at the end A,not be sufficient to lift the end A?

### Physics

A 56kg student runs at 5m/s, grabs a hanging rope and swings out over a lake. He releases the rope when his velocity is zero. The length of the rope is 10m, what is the angle when he releases the rope? (The person swings from the centre to the right).

### math

A park is in the form of a rectangle 100 m×80 mat. At the centre of the park there is a circular lawn. The area of the park excluding the lawn is 4150 m^2 find the radius of the circular lawn

### physics

Using Kepler's constant (9.84 X 10^-14), calculate the orbital radius of an artificial satellite whose period of revolution around the Earth is 1.43 X 10^4s(3.64 h).

### Physics

If a satellite is orbitting the earth 710km above the earths surface, and it's velocity is 7,406.8 meters/sec, what is it's cetripedal acceleration??

### Science

What units of measurement do you use to measure the earth to... 1. Moon 2. Galaxy 3. Sun 4. Communication satellite 5. Pluto 6. Proxima Centauri

### physics

1. At what distance above the Earth (mass of 5.97 x 1024 kg and radius of 6.38 x 106 m) would a satellite have a period of 125 min?

### physics

Two equal sphere each weighting 1g hang by 2 equal silk thread from the same point the sphere are charged with in Contact and comes to rest with their centre 2 cm apart and 20 cm vertically below the point of support .find charge on sphere? solutions of this question

### Motion

A body weighing 150 N, moves with simple harmonic motion. The velocity and acceleration of the body when it is 200 mm from the centre of oscillation, are 5 m/s and 20 m/s2 respectively.Determine (a) amplitude of motion ,no. of vibrations per minute, Periodic time and angular ...

### physics

What is the linear speed of Saturn in its orbit about the sun? Give your answer in meters per second. (Consider the orbit of Saturn to be a circle of radius 1.43×1012 m and that it takes 29.50 yr for one orbit around the sun.)

### physics

A pole AB of length 10m and weight 600N has its centre of gravity 4m from the end A,and lies on horizontal ground. Calculate the force required to beging tto lift the end. Why would this force applied at the end A not be sufficient to lift the end A

### science

three point electric charges q,2q,4q are placed at the three vertices of an equilateral triangle inscribed in a circle. find the net elect ric field at the centre of the triangle. answer : I think the answer is( 9×10^9 ×q√10)/r^2 ,where r is the radius of circle

### Algebra 2 A Conic Section

Franco is adjusting a satellite because he finds it is not focusing the incoming radio waves perfectly. The shape of his satellite can be modeled by y^2+6y-3x+3=0, where x and y are modeled in inches. He realizes that the static is a result of the feed antenna shifting ...

### Grade 12 Calculus

I need helping in filling in the blanks/ -the angle formed at the centre of the circle by two radii is the _______ angle. -cos delta, sin delta, tan delta are known as the ___________trigonometric ration -cos (pie/2 - x)=sinx is an example of a ________ identity

### Earth Science

According to Kepler's law of harmonies, which planet takes the longest to orbit the Sun?

### Physics

Calculate the speed in m/s at which Earth revolves about the Sun. You may assume the orbit is nearly circular.

### Physics

If the period of the moon were 31 days while its orbit radius 3.8x10^8m, what would the mass of the Earth be?

### Chemistry

Assume earth travels in UCM in orbit around the sun R=1.50 x 10 to the 11th power m T-365.25

### physics

It is falling. It has to fall, that is the law of gravity. Otherwise, it would leave Earth in a straight line. But if it falls at exactly the rate it needs to fall to travel in an orbit, we call that "orbiting". If if falls faster than that, it crashes into Earth. If if falls ...

### physics

a satellite can be launched into orbit through use of a specialized cannon that measured 18.0 meters in length. what would the average acceleration through this cannon have to be in order to have a muzzle velocity of 29000 km/h ?

### physics

A satellite is orbiting around a planet. its velocity is found to depend upon a.)Radius of orbit b.)mass of planet c.)universal gravitational constant(G) Using dimensional analysis find an expression relating orbital velocity to the above physical quantities

### Math Algebra

How can I solve this problem? A circle has diameter [AB]. The centre of the circle is (1,3), and B has coordinates (4,-1). # Find the coordinates of A. # Find the length of the diameter. HELP ME PLEASE

### Physics

A quarter on a spinning vinyl record has a centripetal acceleration of 31.8 m/s2. What is the acceleration of the quarter if it is placed twice as far from the centre of the vinyl record?

### Physics

A quarter on a spinning vinyl record has a centripetal acceleration of 34.0 m/s2. What is the acceleration of the quarter if it is placed twice as far from the centre of the vinyl record?

### physics

1. If our sun shrank in size to become a black hole, using the gravitational force equation, explain why the Earth's orbit would not be affected. 2. Strictly speaking, you weigh a tiny bit less when you are in the lobby of a massive skyscraper than you do at home. Why is this ...

### physics

Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the orbit of the moon?

### phYSICS!!!

Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the orbit of the moon?

### PHYSICS!!!

Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the orbit of the moon?

### Physics

Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the orbit of the moon?

### Physics

Recently, Asteroid 2012 DA14 came within 34,200 km from the center of the earth at its point of closest approach. If the moon goes around the earth once every 27.5 days, what is the ratio of the distance of closest approach of DA14 to the radius of the orbit of the moon?

### physics

what is the angular speed of one satellite as seen by an astronaut in another satellite?

### Algebra 2 A

Franco is adjusting a satellite because he finds it is not focusing the incoming radio waves perfectly. The shape of his satellite can be modeled by mc024-1.jpg, where x and y are modeled in inches. He realizes that the static is a result of the feed antenna shifting slightly ...

### physics

a bullet of mass 0.015kg strikes a ballistic pendullum of mass 2kg.the centre of mass of the pendulum rises a verticle distance of 0.12m.assuming that the bullet remains embedded in the pendulum, calculate the bullets initial speed.(show all calculations and steps)

### Math

This is gr 12 calculus btw I need helping in filling in the blanks/ -the angle formed at the centre of the circle by two radii is the _______ angle. -cos delta, sin delta, tan delta are known as the ___________trigonometric ration -cos (pie/2 - x)=sinx is an example of a ...

### physics(moment/equilibrium)

A pole AB of length 10m and weight 600N has its centre of gravity 4m from the end A,and lies on horizontal ground. Calculate the force required to beging tto lift the end. Why would this force applied at the end A not be sufficient to lift the end A

### Physics

Three point sized bodies each of mass M fixed at three corners of light triangular frame of side length L about an axis perpendicular to the plane of frame and passing through centre of frame the moment of inertia of three bodies is

### Physics

On August 12, 2005 the Mars Reconnaissance Orbiter (MRO) was launched from Earth and reached Mars on March 10, 2006. The orbiter is in roughly circular orbit about 390 km above the martian surface. Mars has a radius of 3396 km and a mass of 0.642 x 1024 kg (6.42E23 kg). b) ...

### Physics

On August 12, 2005 the Mars Reconnaissance Orbiter (MRO) was launched from Earth and reached Mars on March 10, 2006. The orbiter is in roughly circular orbit about 390 km above the martian surface. Mars has a radius of 3396 km and a mass of 0.642 x 1024 kg (6.42E23 kg). b) ...

### Physics

determine the distance from earths centre where the force of gravity acting on a space probe is only 11% of the force acting on the same probe at earths surface. Express your answer in terms of earths radius, rE

### French

What do these mean in English? Tu habites dans le centre-ville? Qu'est-ce qu'il y a dans ton village? Qu'est-ce qu'on peut faire a Manchester? Qu'est-ce tu fais a Manchester? Est-ce que tu aimes habiter a Manchester?

### Maths

A sector of a circle of radius 7cm subtending an angle of 270 degree at centre of the circle is use to form a cone? (A)find the base radius of the cone. (B)calculate the area of the base of the cone.