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

25,143 results, page 74

Physics

The International Space Station is 370 km above the Earth's surface (Re = 6378 km, Me = 5.98 x 10^24 kg). What is the linear velocity of the space station in m/s

Earth Science

Describe how weathering and erosion can be both destructive or constructive. I am still confused on the difference of erosion and weathering...

Earth Science

16.   What type of instrument measures seismic waves?  A. Mercalli scale B. Seismic scale C. Seismogram D. Seismometer D?

math

A person weighs 120pounds on earth weighs 20 pounds on the moon how much does a 90 pound persob weigh on the moon

chemistry

The pressure of the earth's atmosphere at sea level is 14.7 lb/in2. What is the pressure when expressed in kg/m2? (2.54 cm = 1 in., 2.205 lb = 1 kg) 2.62×102 kg/m2 5.02×104 kg/m2 4.30×10-3 kg/m2 2.09×10-2 g/m2 1.03×104 kg/m2

Astronomy

An astronomical unit can be thought of as... a 25 light years b 19 earth years c 93 million miles d 100 billion miles

Physics

Does an apple exert a gravitational force on the earth? If so, how large a force? Consider an apple (a) Attached to a tree and (b) falling.

English

1. No one is to solve the problem. 2. No one can solve the problem. ---------------- Does #1 mean #2? 3. I was never to see him again. 4. I was doomed never to see him again. -------------------------- Does #3 mean #4? 5. If you are to succeed, you must study hard. 6. If you ...

Art

Could you please check these sentences, too? Thank you very much. 1) The Waste Land is a complex long poem of 433 lines about a “waste land” which seems both personal and external. It is divided into five sections and is dedicated to Eliot’s friend and poet, Ezra Pound, ...

physics

need help on this three part one its about inelastic collisions momentum and energy related with work Find the speed at which Superman (mass=76.0 kg) must fly into a train (mass = 17620 kg) traveling at 60.0 km/hr to stop it. Running into the train at that speed would severely...

science

What star other than the sun is closest to the earth? Proxima Centauri, which is part of the alpha Centauri three-star system

Physics

I am not too sure how to solve this problem: Gravity on the surface of the moon is only 1/6 as strong as gravity on the Earth. What is the weight of a 10 kg object on the moon? This is how I did 1/6(10)(9.8)=16.3 N

astronomy

what distance do earth move in a second, a hour, a day? if the distance between eath and the sun is 150,000,000 km

Earth Science

Why is the Colorado river in central nevada not part of a larger river system? Please help!! i am stuck in this quetion. Please help!!!!!!

earth science

Help please anyone? If the wet-bulb thermometer and the dry-bulb thermometer readthe same temperature, the air is said to be??? Anyone know?

Science

How much would 1kg weigh on the Moon if the pull of gravity there is about one-sixth of the pull of gravity on earth?

11th grade physics

how high above the surface of the Earth would an object need to be for its weight to be half its weight on the surface?

physics

A hard ball dropped from a height of 1 m in earth’s gravitational field bounces to a height of 95 cm. What will be the total distance traversed by the ball?

Physics

A hard ball dropped from a height of 1 m in earth’s gravitational field bounces to a height of 95 cm. What will be the total distance traversed by the ball?

Algebra

How do I calculate finding the weight of someone, on the earth's surface with a radius of 3900 miles, and their weight 625ft above the surface?

SCIENCE

Igneous rock is produced by volcanoes. What do you know about the activity on Earth during the time the oldest layer of rock was produced?

SCIENCE

Igneous rock is produced by volcanoes. What do you know about the activity on Earth during the time the oldest layer of rock was produced?

physics

Rank the microtidal forces on your own body, from greatest to least, produced by the:A. JupiterB. PlutoC. Earth greatest to least.

math

Which option best explains the sentence below in math terms? The Earth is covered by 30 percent land and 70 percent water.

science

in this place Friday comes before Thursday,fall comes before spring,and Mars is closer to the moon than earth?

Science

1)What is the Theory of Plate Tectonics? 2)What physical features are caused by plate tectonics? 3)What causes Earth's plates to move continuously?

science

Tom is markina locations of active volcanoes on a world map explain how the locations of the volcanoes are related to Earth's plates

math

the steps to a math quiz. the earth rotates once every 23 hours 36 minutes 4 seconds.how many seconds is that?

Physics

(a)Compute the value of G at a point in space that is 7.0X10^6 m from the center of the earth. What will be the value of G at a point with a radius twice that in (a)?

physics

how high above the surface of the Earth would an object need to be for its weight to be half its weight on the surface?

physics

how high above the surface of the Earth would an object need to be for its weight to be half its weight on the surface?

climate change

What would our climate be like if the earth was shaped like a cube instead of a sphere? thanks

physical

. On Earth the Mars rover had a weight of 9800 N. What will be its weight on mars where the acceleration due to gravity is 4 m/s

Earth Science

Which horizons are composed of unweathered rocks, weathered rocks, young soil, and q well-developed soil?

earth

The capital letter(s) that label a rock unit (e.g., KJk) on a geologic map represents the rock unit's

Science

The force of gravity on Jupiter is much stronger than the force of gravity on Earth. Which of the following explains why this is true?

geography

This reflects some heat back into space and traps some heat near the earth.

EARTH SCIENCE

Smog is the worst in.. A. Chicago B. New York C. Los Angles MY GUESS: C. LOS ANGLES

Science

If you wanted to consult the geologic period for when the first vertebrates evolved, where would you look? a. in the section for the Ordovician period of the Paleozoic era. b. in the section for the Quaternary period of the Cenozoic era. c. in the section for the Triassic ...

Science

If you wanted to consult the geologic period for when the first vertebrates evolved, where would you look? a. in the section for the Ordovician period of the Paleozoic era. b. in the section for the Quaternary period of the Cenozoic era. c. in the section for the Triassic ...

Science

If you wanted to consult the geologic period for when the first vertebrates evolved, where would you look? a. in the section for the Ordovician period of the Paleozoic era. b. in the section for the Quaternary period of the Cenozoic era. c. in the section for the Triassic ...

Science

Hey everyone I need some omework jelp as you can see.I'm not that well in Science so could you give me some tips? And i would like somr homework help for the following passge and answers. DIRECTIONS Read the paragraph and answer the questions. You can find examples of the ...

Math

During the summer break, Allie works as many as 35 hours per week. On Saturdays she spends between two and six hours teaching adults to swim. On weekdays, she can work between 10 and 40 hours teaching swimming lessons at a children's camp. Teaching adults pay $10 per hour ...

Physics Thanks

Please help... Let g be the acceleration due to gravity at the surface of a planet of radius R. Which of the following is a dimensionally correct formula for the minimum kinetic energy K that a projectile of mass m must have at the planet's surface if the projectile is to ...

physics

An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...

Physics

An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...

physics

An arrangement of two pulleys, as shown in the figure, is used to lift a 49.6-kg mass a distance of 3.70 m above the starting point. Assume the pulleys and rope are ideal and that all rope sections are essentially vertical. (a) What is the mechanical advantage of this system...

Shakesphere

In the novel; Twelfth Night A quote is stated: "And thus a whiligig if time brings in his revenges" I am to write an essay on this. I have put some ideas together, yet I am unable to create an intro. Could you help by giving me a few hints on how to start an essay revolving ...

Math

1. 2/5 + -3/5= 2. M - 7/18 = -5/18 (must reduce) 3. R + 7/12 = -5/12

math

If x + 3/2 is an integer, then x must be what

math

what must be added to 2x^3 - 4x +9 to get 5x^ 3 -13

greek mythology

1.All the following were writers of ancient Greek plays and poetry exept a.Homer b.Sophocles c.Joseph Campbell 2.Chaos gave birth to the following exept a.Uranus(heaven) b.Tartarus(under earth) c.Gaea(earth) 3.Gaea gave birth to the following exept a.mountains b.Pontus(sea) c....

English

Read each sentence then underline the helping verbs and circle the main verbs 1.Books do furnish a room helping:do main:furnish 2.I am walking to school these days helping:am main:walking 3.The water line must have burst. helping:must have main:burst 4. I have told him not to ...

EARTH SCIENCE

What is the relationship of climate to weathering (both chemical and mechanical)? Are certain climates more susceptible to certain types of weathering? Why or why not?

science

the acceleration due to gravity of mars is 3.7 m/s2. An astronautto throw a tennis ball 70 m upward on mars. How high will he able to throw it on the earth?

physics

The acceleration due to gravity of mars is 3.7 m/s2. An astronautto throw a tennis ball 70 m upward on mars. How high will he able to throw it on the earth?

physic

The acceleration due to gravity of mars is 3.7 m/s2. An astronautto throw a tennis ball 70 m upward on mars. How high will he able to throw it on the earth?

science

if earth is one astronomical unit from the sun and has a period of 1 year, approximately how far is planet X form the sun if it has a period of 26 yearS

physics

free fall on the moon is 1.62m/s2 What is the lenght of the pendulum whos period on the moon mtches the period of 1.80m long on Earth?

scientific problem solving

a student wanted to know how his weight on mars would compare with his weight on earth. prentend that traveling to mars is possible.

Science plz help

Igneous rock is produced by volcanoes. What do you know about the activity on Earth during the time the oldest layer of rock was produced?

Science

If the distance from the moon to the Earth decrease from 230,000 miles (which it is today) to 20,000 miles, what affect would this have on the tides?

Physics

The gravitational field strenght on the moon is 1.63N/kg. If a rock on the moon weights 2000N, how much does the same rock weigh on the earth?

HELP>>PLZ

the vertical component of earth magnetic field at a place is root3 times the horizontal component.What is the value of angle of dip at this place?

science

If a scale model of the planets are built with Earth's diameter set to 10 centimeters, how big would the model of Jupiter have to be in centimeters?

physics

A seagull flies at a velocity of 10.00 m/s straight into the wind. (a) If it takes the bird 18.0 min to travel 6.00 km relative to the earth, what is the velocity of the wind?

physics

The acceleration of gravity on the surface of a planet is 17.34 m/s^2. What is the weight on Jupiter of a woman whose weight on Earth is 122 lb? (use 1 lb = 0.4536 kg where g = 9.8 m/s^2) W_{woman} =

physics

The acceleration of gravity on the surface of a planet is 17.34 m/s^2. What is the weight on Jupiter of a woman whose weight on Earth is 122 lb? (use 1 lb = 0.4536 kg where g = 9.8 m/s^2) W_{woman} =

physics

The acceleration of gravity on the surface of a planet is 17.34 m/s^2. What is the weight on Jupiter of a woman whose weight on Earth is 122 lb? (use 1 lb = 0.4536 kg where g = 9.8m/s^2) W_{woman} =

physics

A 4.0 kg ceiling fan is placed 2.5 m above the floor. What is the gravitational potential energy of the fan(use Earth's value for gravitational acceleration)?

Astronomy

Why will detecting Earth-sized planets be much more difficult than finding Jupiter-sized planets around other stars?

SS plz help me plzzzzzzz

What are the two major forces that reshape earth? Describe how itworks. plz plz plz help me there are no answer choices hope u can still help

Physics

a stationary 25 kg object is located on a table near the surface of the earth. The coefficient of static friction between the surface is 0.50 and of kinetic friction is 0.30.

English

Write this in your own words. what is Pollution? Pollution is the introduction of contaminants into the natural environment that cause adverse change.[1] Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of ...

Physics

4. A basketball is thrown from a height of 1.60(m), with an angle of 45o above the horizontal. (a) With what initial speed must the basketball be thrown so that it reaches the basket at the highest point of its trajectory? The basket is at a height of 3.05(m) above the ground...

Science

Which star shown on the luminosity and temperature of stars graph in the Earth Science Reference Tables is currently at the Sun's final predicted stage of development, and how do you know? a. Polaris b. Procyon B c. Sirius d. Rigel

TO BOBPURSLEY

acceleartiononmoon= GMassmoon/radius^2 =G 7.35E22/(1.74E6)^2= G 2.43E10= = 6.67E-11*2.43E10= 1.62 m/s^2 or as a gravitational field constant= 1.62 N/kg I have no idea why you used the mass of Earth. were did you get a = r^-2 Gm from i thought that the equation was net force = ...

astronomy

Astronauts on the Moon look back at Earth, a distance of about 400,000 km away. If the cities of Washington, D.C. and New York are separated by 300 km, what will be the angle between them when viewed from the Moon?

EARTH SCIENCE

Do you foresee humans colonizing the planets and moons of our solar system in the long term future of our species? What kind of terraforming would be necessary to make this possible?

Science

Is the answer D? Thank you The earliest atmosphere of Earth is not believed to have contained oxygen. Which cellular component would not have been useful at that time? A) chloroplast B) nucleus C) plasma membrane D) mitochondrion

Literacy

Which of the following publications are both listed under the "Magazines" results? A. Science News and Earth Island B. Astronomy and Science C. Odyssey and Natural History D. The Economist and American Scientist my answer is D

Literacy

13. Which of the following publications are both listed under the "Magazines" results? A. Science News and Earth Island B. The Economist and American Scientist C. Odyssey and Natural History D. Astronomy and Science ANSWER IS A

Earth/Space Science

In many ways, the floor of oceans is no better explored than space. Why could discoveries such as life around deep-sea hotspots not be investigated until the past few decades?

physics

a boy throws a stone straight upward with an initial speed of 15 m/s on the surface of the earth. what maximum height above the starting point will the stone reach before falling back down?

physics

A 19 turn circular coil of wire has diameter 1.09 m. It is placed with its axis along the direction of the Earth's magnetic field of 51.0 µT, and then in 0.195 s it is flipped 180°. An average emf of what magnitude is generated in the coil?

Physics

A proposed space station includes living quarters in a circular ring 46.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?

Physics

Calculate the energy needed to accelerate a spaceship of mass 10,000 kg to a speed of 0.3c for intergalactic space exploration. Compare with the projected energy usage of the Earth in a decade~10^22J? well i don't know how to start the problem

Physics

A proposed space station includes living quarters in a circular ring 50.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?

Physics

A jet aircraft is flying due south at 300 m/s at a place where the earth’s magnetic field is 80 µT. Find the potential difference between the wing tips if they are 25 m apart. Which tip has the higher potential?

math

a well of diameter 3 m is dug 14 m deep . the earth taken out of it has beem spread evenly all around of it in the shape of circular ring of width 4 m to form embankment. find the height of embankment .

physics

On Earth a rock falls an unknown vertical distance from a resting position and lands in a lake. If it takes the rock 2.5 seconds to fall, how high is the cliff that the rock fell from?

writing

do you think that life on earth could become this difficult during your life time?what factor could cause to take place ?a story about that shows what life might be like in the world?

Science

Am I correct? Which of the following is an example of human impact on climate changes? • the greenhouse effect • changes in solar output • global warming • changes in the tilt of Earth's axis

Earth Science

Where are new volcanoes forming in Hawaii? I know the new volcanoe is Loihi but I'm not sure where it is forming.

Earth Science

Differentiate the composition and texture of a plutonic igneous rock and a volcanic igneous rock.

earth science

why is the arrival time for the p - wave earlier that the arrival of the s-wave the same seismograph station?

Earth science project

How do lost pet/pet ads predict earthquakes, procedure to do the project ?

geography

What part of a map tells the relationship of distance shown on the map to real distance on the Earth?

earth science

How are trenches related to plate boundaries? How are trenches explained by the theory of plate tectonics?

physics

How would your Mars weight compare to your earth weight if the acceleration due to gravity on Mars is 3.71 m/s2?

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