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

25,143 results, page 31

### physics

A 5.9-kg rock and a 3.0 10-4-kg pebble are held near the surface of the earth. (a) Determine the magnitude of the gravitational force exerted on each by the earth.(b) Calculate the magnitude of the acceleration of each object when released.

### Physics

On a cloudless day, the sunlight that reaches the surface of the earth has an intensity of about 1.2 103 W/m2. What is the electromagnetic energy contained in 6.4 m3 of space just above the earth's surface?

### science

Suppose the moon rotated on it axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *PLEASE HELP ME WITH THIS QUESTION*

### science

Suppose the moon rotated on it axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *PLEASE HELP ME WITH THIS QUESTION*

### physics

Two electrons are placed; one at north pole and other at south pole of earth. Find the force between them. Given diameter of earth= 12800 km.

### math and science

A space shuttle with a mass of 4,06 X 10kg,orbits earth at a height of 720km above the surface of the earth.calculate the gravitational force experienced by the shuttle

### Science---Hurry Please Help!

If Earth were located where Mars is in space, the temperature of Earth would A) be significantly higher. B) be significantly lower. C) be about the same. D) fluctuate greatly. B maybe?

### Physics

About 5.12 x 104 m above Earth's surface, the atmosphere is sufficiently ionized that it behaves as a conductor. The Earth and the ionosphere form a giant spherical capacitor, with the lower atmosphere acting as a leaky dielectric. Find the capacitance C of the Earth-...

### science

How do the moons stay in orbit around Jupiter?

### physics

how the moons stay in orbit around jupiter ?

### Chemistry

What is the difference between and orbit and an electron orbital?

### Physics

Whats the speed of an electron of Bohr's orbit K

### Physical Science

How does gravity help keep satellites in orbit?

### astronomy

If the planet is in an edge-on orbit, what would its mass be (in kg)?

### Calculus

An air ambulance is travelling from Barrie to Toronto. Toronto is located 90 km [S5°E] of Barrie. If the wind is blowing from the South with a velocity of 62 km/h, and the plane’s air speed is 375 km/h, what direction must the pilot fly to make it to Toronto? What on earth ...

### Biology

Which of the following must occur for a plant or animal to grow and develop normally? a) Sufficient oxygen must be available to stimulate cell division. b) Theorganism must recive a supply of the appropriate horones from its parents. c) It must be able to control the timing ...

### Physics

A satellite orbits at an average altitude of h = 409 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 10^24 kg

### physics

A satellite orbits at an average altitude of h = 409 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 10^24 kg

### science help pls pls

The table below shows the average distances of Jupiter and Earth from the sun. Name of Planet Average distance from the sun (in AU) Jupiter 5.2 Earth 1.0 What is the difference between the orbital periods of Jupiter and Earth? 4.20 years 6.20 years 8.86 years 10.86 years 12.40...

### physics

An astronaut is traveling in a space vehicle moving at 0.520c relative to the Earth. The astronaut measures her pulse rate at 74.0 beats per minute. Signals generated by the astronaut's pulse are radioed to the Earth when the vehicle is moving in a direction perpendicular to ...

### physics

How long would it take for the Earth to complete a full turn if a person at 27° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,379 km for the radius of Earth. Help me please!

### Earth Science

Which of the following statements correctly describes the asthenosphere? 1- it is thin cold and rigid layer 2- it is the source of the earth's heat 3- it permits plate motion 4- it occurs only near subduction zones My answer is 1

### Algebra 1

Earth has a radius of about 6.4 x 10 to the 6th power m. Approximate the surface area of earth using the formula for the surface area is a sphere, S = 4 pi r squared. Earths surface is about 70 percent water. About how many square meters of earths surface are covered with ...

### science

the alkaline-earth metals react similarly because they all have the same number of electrons in their outer energy level. Which group contains the alkaline-earth meatals?

### earth science

If the tilt of Earth’s axis were 10◦ , where would we find the Arctic and Antarctic Circles (what latitudes)? Would this cause a change in the dates of the solstices, equinoxes, and perihelion and aphelion?

### physics

A 70 kg man weighs 686 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 14% of his body weight? i don't even know where to start with this question... i need help!

### Earth

Some scientists have hypothesized that meteorites have periodically bombarded Earth and caused mass extinctions every 26 million years. How might this hypothesis be tested?

### earth

Two rockets are orbiting the earth, traveling in perfect circles with equal radii. The velocity of rocket A is twice that of rocket B. What can be said about their respective centripetal accelerations?

### Physics

the acceleration due to gravity on the moon is 1/6 that on earth. For a projectile with an initial velocity of 15m/s upward what would be the maximum height and total time of flight on the moon and on the earth?

### Physics

The diameter of the Moon is 3.78x10^6m. It subtends an angle of .00982 radians at the surface of Earth. How far is the Moon from Earth? (Please explain I can't wrap my head around this question.)

### physics

A 910kg object is released from rest at an altitude of 1200 km above the north pole of the earth. If we ignore atmospheric friction, with what speed does the object strike the surface of the earth?

### chemistry

Global warming refers to the rise in average global temperature due to the increased concentration of certain gases, called greenhouse gases, in our atmosphere. Earth's oceans, because of their high heat capacity, can absorb heat and therefore act to slow down global warming. ...

### Math 8th Grade Please help

The radius of Earth is 6,371 kilometers. A space shuttle orbits 315 kilometers above the surface of Earth. The space shuttle completes 240° of a revolution around Earth in one hour. What is the average speed of the space shuttle? Choose the closest answer. Please help both ...

### earth

A man with a weight of 1000 newtons on earth visits each planet what is his weight on each?

### earth and sun

express the distance of the earth from the sun using exponential notation

### earth

If a satalite weighs 90 kg at 10000 miles from the earth, how far away is it when it weighs 10 kg?

### physics

A student on Earth has a mass of 55.5 kg. With how much force does the Earth pull on the student?

### ^NeEd HeLp^

What iz d. location ov d. MOON with respect 2 d. EARTH? that iz, iz d. MOON inside or outside ov d. EARTH?

### Math And Physics

Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-2 Please answer the question fully ...

### Math BOBPURSLEY HELP HELP HELP HELP

Law of Gravitation- Find an expression for the magnitude of the initial velocity that a projectile must possess in order to leave the earth when air friction is neglected. The gravitational constant for g is, G = 6.67428*10^-11 m^3 Kg^-1 s^-2 Please answer the question fully ...

### Pre-Calc (Please my class starts in an hour!! :)

Can someone please help me with the following question. 1) The weight of an object above Earth can be modeled by a function of the form w(h)=(r/r+h)^2*"w , where r is the radius of Earth 0" (approximately 3950 miles)," h" is the distance above Earth's surface, and "w is the ...

### MATH

Earth, Jupiter, and Uranus all revolve around the sun. Earth takes 1 yr, Jupiter 12 yr, Saturn 30 yr, and Uranus 84 yr to make a complete revolution. One night, you look at those three distant planets and wonder how many years it will take before they have the same position ...

### Government

What does a city seeking aid often have to do to be eligible for Federal Government grants and loans ? A. It must prove it is not in debt. B. It must provide a master plan for future growth. C. It must choose new city leadership. D. It must become a municipality. A and B sound...

### social studies

what is the greatest challenge facing people in turkey as a result of its diversity? 1. Turks must protect their status as the largest ethnic group 2. Turks must encourage other to follow Turkish traditions 3. Kurds must struggle to keep their cultures alive 4. Kurds must ...

### social studies

what is the greatest challenge facing people in turkey as a result of its diversity? 1. Turks must protect their status as the largest ethnic group 2. Turks must encourage other to follow Turkish traditions 3. Kurds must struggle to keep their cultures alive 4. Kurds must ...

### English

1. In which of the following selections is point of view used to highlight contradictions in what is being described? A) "Aztec Creation story" B) "Day of the Butterfly" C) "At the Tourist Centre in boston"** D) "Two Bodies" 2. Which of the following selections are true of ...

### Physics

Some people believe that the Moon controls their activities. The Moon moves from being directly on the opposite side of Earth from you to be being directly overhead. Assume that the Earth-Moon (center-to-center) distance is 3.82 multiplied by 108 m and Earth's radius is 6.37 ...

### Math

As the earth revolves around the sun, distant objects can be seen from different locations. This idea can be used to measure the distance between earth and nearby stars and is called stellar parallax. To see how this process works, consider the simplified scenario below. A.) A...

### Physics

Which direction (Eastwards or Westwards) in the sky would the Sun appear to move as seen by a stationary observer on the surface of the hypothetical planet that has a sidereal rotation (on its axis) period of 120 days, and a revolution (around the Sun) period of 40 days, where...

### science

The Paleozoic Era is noted for which two changes? a) rocks were formed b) the earth heated up c) people appeared on earth d) mountains were formed Just need to know if my answer or right or wrong. Thanks! :) d

### Physics

A Borg cube starship is zooming past Earth with a speed v=0.97c as shown. The cube has side lengths of 3.03 km. What is its volume, measured from Earth? Can someone step me through this problem?

### chem

The average distance between planet X and Earth is about 1.5 x 10^8 miles. How long (minutes would it take pictures transmitted from a space vehicle on Planet X's surface to reach Earth?

### earth

how long would it take a radio wave with a frequency of 4.3 X10 to the 5th power Hz to travel from Mars to Earth if the distance between the two planets is approximately 8.00 x 10 to the 7th power km?

### math 15

find the minimum height above the surface of the earth so that the pilot at point a can see an object on the horizon at c 125 miles away. assume the diameter of the earth to be 8000 miles.

### Maths

If a plane travels halfway round the world at an altitude of 11300m, what extra distance in km, will it fly compared with the distance measured at the surface of the Earth? The radius of the earth is approximately 6400km

### Geology

The Sun Is 150 Million Kilometers From The Earth, And The Earth's Equatorial Radius Is 6378 Km. How Much Would You Expect The Sun's Intensity To Drop, Based Only On This Additional Distance?

### Physics

Please help The year is 2115. There is a high jump competition on planet Mars. An athlete of mass 72 kg who has been clearing a height of 2.44 m on Earth just the week before is competing here. What is the height this athlete can expect to clear in this competition? Relevant ...

### English

Can you pleae tell me which alternatives are possible? Thank you very much. 1, They believed a person (better: the individual) should be free from external rules. 2.The Romanics exalted the individual as the centre of life and art.This led to the view of society as an evil and...

### Astronomy

If the elipse were a planet's orbit where would the sun be on the page?

### Food

How did the Wrigley company come up with the name of orbit gum??

### SCIENCE

WHAT IS THE TRUE SHAPE OF HE MOON? ANSWER:ORBIT IS THAT CORRECT

### phys

Find the acceleration due to gravity on a planet whose mass is four times the mass of Earth and whose radius is half the radius of Earth (g is the acceleration due to gravity on Earth).

### Astronomy

Imagine that Earth did not turn on its axis. (a) What would be true about the ecliptic? It would now define the day rather than the year. It would still be defined and could be seen from all points on Earth, but only when they faced the sun. It would still be defined, but only...

### physics

Superman throws a boulder of weight 1850N at an adversary on the surface of the earth, where the magnitude of the acceleration due to gravity, g = 9.80m/s2 . What horizontal force must Superman apply to the boulder to give it a horizontal acceleration of 11.6m/s2 ?

### Econ

If a pure monopolist can price discriminate by separating buyers into two or more groups: A.the marginal revenue curve and the total revenue curve will now coincide. B.the marginal revenue curve will now shift to a position above the demand curve. C.the firm will face multiple...

### physics problem!!

If the water molecules in 5.70 g of water (H2O) were distributed uniformly over the surface of the Earth, how many such molecules would there be on 1.40 cm2 of the Earth's surface? -Molar mass Hydrogen gas(H2)=2.02 g/mol -Molar mass Oxygen gas (O2) = 32.0 g/mol -Radius of ...

### English

Thank you very much for your corrections! Here are other statements on the same newspaper article. 1) The cheetah reintroduction programme is kicking off (starting?) with a meeting of experts in September. 2) The project includes the foundation of a breeding site in which ...

### physics

The coil in a generator has 200 windings and a cross-sectional area of 0.0100 m^2. If the coil turns at a constant rotational speed and the magnetic field in the generator is that of Earth (B = 0.500 × 10^-4 T), how many 360 rotations must the coil complete each second to ...

### Physics

Find the orbital velocity of a satellite orbiting 1800km above sea level in meters per second?

### physics

A satellite orbits at an average altitude of h = 441 km. What is its orbital speed? Use REarth = 6370 km and mEarth = 5.98 x 1024 kg.

### physics

A body is dropped from a height of 10 meters on Earth and hits the ground with a certain velocity. The body is then taken to the moon, which has a gravitational constant that is 1/6th the value as compared to Earth. It is dropped from the same height, hitting the ground with a...

### Physics

The mass of Venus is 0.8140 times that of earth, and its radius is 0.950 times that of earth. Calculate the acceleration of gravity at the surface of Venus. Express your answer in g's (i.e. as a ratio to our acceleration of gravity). 9.01×10-1 is the correct ratio Calculate ...

### physics

How fast would the Earth have to spin to have the person at 24.1° northern geographical latitude float apparently weightlessly across the room? Use REarth = 6,375 km for the radius of Earth. Thanks

### College Physics

A Borg cube starship is zooming past Earth with a speed v=0.97c as shown. The cube has side lengths of 3.03 km. What is its volume, measured from Earth? Can someone step me through this problem?

### overland high school

the gravitional force exerted on objects on the moon is about 1/6 that of earth. if an object weighs 240 newtons on the moon, on earth it would weigh _________.show work

### Earth/Space Science

Some scientists have hypothesized that meteorites have periodically bombarded Earth and caused mass extinctions every 26 million years. How might this hypothesis be tested?

### Science

A space probe on the surface of Mars sends a radio signal back to earth a t a distance of 8.66 x10*7 radio waves travel at a speed of light 3.00 x 10^8 . How many seconds does it take for it to reach earth

### physics

An airplane is flying above the Earth's surface at a height of 10.5 km. The centripetal acceleration of the plane is 16.4 m/s2. What is the angular velocity of the plane moving in uniform circular motion? Take the radius of the earth to be 6400 km.

### physics

An airplane is flying above the Earth's surface at a height of 9.30 km. The centripetal acceleration of the plane is 18.2 m/s2. What is the angular velocity of the plane moving in uniform circular motion? Take the radius of the earth to be 6400 km.

### Physics

An airplane is flying above the Earth's surface at a height of 10.9 km. The centripetal acceleration of the plane is 16.7 m/s2. What is the angular velocity of the plane moving in uniform circular motion? Take the radius of the earth to be 6400 km.

### earth

If the distance from the moon to the Earth increased from 230,000 (which it is today) to 2,000,000 miles, what affect would this have on the tides?

### Physics

Gravity on the surface of the moon is only 1 as strong as gravity on the Earth. 6 What is the weight of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s2 . Answer in units of N.

### Earth science

1. Which of the following is not a natural cause of climatic change? A. Earth's tilt B. Solar activity C. Human activity D. Volcanic activity I think it is C

### Science

suppose a skydiver (mass = 75 kg) is falling toward the earth. when the skydiver is 100 m above the earth he is moving at 60 m/s. at this point calculate the skydiver's

### science

5. Suppose a skydiver (mass = 75 kg) is falling toward the Earth. When the skydiver is 100 m above the Earth he is moving at 60 m/s. At this point calculate the skydiver’s…….

### physics

gravity on the surface of the moon is only 1/6 as strong as gravity on earth. what is the weight of a 37 kg object on the earth? The acceleration of gravity is 10m/s answer in units of N

### Physics

Gravity on the surface of the moon is only 1 6 as strong as gravity on the Earth. What is the weight of a 33 kg object on the Earth? The acceleration of gravity is 10m/s2 . Answer in units of N.

### physics

A rocket consists of a payload of 4280.0 kg and 1.626 105 · of fuel. Assume that the rocket starts from rest in outer space, accelerates to its final velocity, and then begins its trip. What is the speed at which the propellant must be expelled to make the trip from the Earth...

### physics

what is the apparent angle the diameterof the moon subtends as seen from the earth in radians. average moon earth distance3.84*10e8 radius of the moon 1.74*10e6

### College Physics

Gravity on the surface of the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 14 kg object on the Earth? The acceleration of gravity is 10m/s2 . Answer in units of N.

### Physics

At 6400 km above the earth’s surface, an object weighing 71 N on the surface would weigh only 18 N. Acceleration due to gravity will be about ¼ that on the surface of the earth.

### principles of physics

Calculate the force of gravity between Earth and the Sun (the Sun's mass = 2.0×10^30 kg; average Earth-Sun distance = 1.5×10^11 m).

### math

Earth's mass, in kilograms, is 5.97x10^24. the moon's mass is 7.34x10^22. How many times greater is Earth's mass (in scientific notation)?

### Physics

Gravity on the surface of the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 24 kg object on the Earth? The acceleration of gravity is 10m/s2 .

### Physics

A particle is projected from the surface of Earth with a speed equal to 2.4 times the escape speed. When it is very far from Earth, what is its speed? ?km/s

### Physics

An elevator is lifted up by a thick steel cable. While the elevator is moving upwards with a decreasing velocity, a. the upward force on the elevator by the cable is greater than the downward force of the Earth b. the amount of upward force due to the cable is equal to the ...

### Science

A hurricane becomes more powerful be evaporating water from? lakes mountains oceans*** rivers 1. Over time, scientists have changed their model of our solar system. It has transitioned from A) a sun-centered to an moon-centered model. B) a sun-centered to an earth-centered ...

### Physics

What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)

### physics

What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)