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

24,970 results, page 64

Physics

What equations should I use to calculate the effective value of g, the acceleration of gravity (in meters/second^2), at 5800 km above the earth's surface?

Physics earth & Space

toward what direction, north or south would you look to the sun at noon on june 21-22 if you lived at the following latitudes

physics

what sould be the angular speed with which the earth have to rotate on its axis so that a person on the equator would weight 3/5th as much as present..??

Earth Science

I need to calculate the discharge results for the following dates: April 4 2:52 mins 1.55 meters 5 2:40 1.63m 6 2:06 1.7m 11 1:17 1.86m 12 :59 1.82m 13 1:10 1.8m Please help me.

chemistry

how long would it take a radio wave with a frequency of 7.25 x 10to the 5th to travel from Mars to earth if the distance is approx. 8.0 x 10 to the 7th?

Calculus

Assuming the earth is a perfect sphere of raius 3950 miles, find (in inches) d. d, is the difference between the arc and a straight line.

physics

what is the magnitude of the centripetal force acting on the earth as it orbits the sun assuming a circular orbital speed of 3.00 X 10^4 meters per second

5th grade math

Given 257 sec, 15,000 feet per second Find the acceleration due to earth's gravity.

math

if an object on earth is projected upward with an initial velocity of 32 feetper second, then its height after t seconds in given by h(t)=32t-16t^2

Earth Science

Explain why the following statement is incorrect: Climatologists use the data from ice cores to directly measure past temperatures.

earth

#10 which of the following is an effect of divergent plate movement? a.) glacial activity b.) mountain building d.) canyon erosion e.) sea floor spreading

Statics

Two identical spheres of radius 80mm and mass 2 kg on the surface of the earth are placed in contact. Find the gravitational attraction between them.

science

whether a stone thrown upword with very high speed fall to the same point to the ground? If yes then why even the earth is in motion?

earth science

The point at which the continent stops and the rock of the ocean floor begins is the called the continental A. shelf. B. divide. C. drift. D. slope. is it d ?

Astronomy

What is the size, i.e. the radius, of a black hole with a mass equal to that of Earth (MEarth=6×1024kg)? Give your answer to one significant figure.

PEOPLE, SCIENCE, AND THE ENVIRONMENT

. If all life ceased on Earth, how quickly would the atmosphere become like that of Venus and Mars? Explain.

science

which one of these are not used to power generators? A- wind B- moving water C- hot rocks under earth's surface D- static electricity

Earth Science

1.   What term is used to describe the process by which agents are carried from one place to another because of erosion?  A. Disposition B. Deposition C. Reposition D. Transplantation B?

Algebra

suppose a pendulum use to show the rotation of the earth has a period of approximately 16.9 seconds. What is the length using formula T=2pi sq root L/32

mqth and science early childhood

​Children do not need a variety of concrete experiences that enable them to learn the properties of Earth's materials

Trigonometry

Assume that Earth's surface is a sphere of radius 12000/pi miles. In an hour how far can Felix "Travel" if he is stationary at a position on the equator?

Science-Chemistry

How would I figure out how far the distance in kilometers between the sun and earth be if it takes 8.3 minutes for light to travel?

physics

A ship leaves the island of Guam and sails a distance 280 at an angle 39.0 north of west. 1.In which direction must it now head so that its resultant displacement will be 125 directly east of Guam? (Express your answer as an angle measured south of east) 2.How far must it sail...

math

The cheerleading squad is having a bake sale. They want to bake at least 120 cookies. They made 12 cookies the first hour and 24 cookies the second hour. a)Write an inequality that describes the scenario. Let Variable h represent the number of hours that must bake to meet or ...

calculus

Carbon-14 is a radioactive substance produced in the Earth's atmosphere and then absorbed by plants and animals on the surface of the earth. It has a half-life (the time it takes for half the amount of a sample to decay) of approximately 5730 years. Using this known piece of ...

Physics

Sally Sue is atop a 10.0 m high platform where she will drop an apple straight down. On the ground below, and 20.0 m (horizontally) away, Betty Lou will shoot an arrow at the apple. If Betty's arrow has a release speed of 25.0 m/s, at what angle must she fire that arrow, and ...

physics

A certain hydraulic system is designed to exert a force 100 times as large as the one put into it. (a) What must be the ratio of the area of the slave cylinder to the area of the master cylinder? (b) What must be the ratio of their diameters? (c) By what factor is the distance...

Chemistry

Hi. I need some help with this. When you stretch a balloon against your lips, is heat given off or absorbed? Which driving force is dominating this change, the tendency toward lower energy or the tendency toward disorder? Heat is given off obviously but I don't know what to ...

Physics

A cyclist intends to cycle up a 7.5 degree hill whose vertical height is 170 m. Assuming the mass of bicycle plus cyclist is 95 kg, calculate how much work must be done against gravity. If each complete revolution of the pedals moves the bike 5.6 m along its path, calculate ...

maths/physics

A plane is flying in a straight line at an unchanging height and unchanging speed. The pilot must drop an object onto a target in front of the plane. At what angle must the pilot see the target at the moment of dropping the object? At that moment, what is the distance between ...

plz help me in physics

A ship leaves the island of Guam and sails a distance 295km at an angle 35.0 north of west. a:In which direction must it now head so that its resultant displacement will be 100km directly east of Guam? (Express your answer as an angle measured south of east) b:How far must it ...

Literature

This essay should have 5 paragraphs. In the 1st paragraph it must contain: Attention-grabbing beginning. Description of issue. Opinion Statement. In the 2,3, 4 paragraph should contain: Different reasons for each paragraph. Evidence to support. In the 5th Paragraph it should ...

english

the task of economic policy is to create a prosperous america.the unifinshed task of the prosperous americans is to build a great society.these tasks remain unfinished:to achieve full employment without inflation-to enhance the effciency and flexibility of our private and ...

Physics

A superhero flies 235 m from the top of a tall building at an angle of 25  below the horizontal. What is the horizontal component of the superhero’s displacement? Draw the vectors to scale on a graph to determine the answer. Answer in units of m Your answer must be within...

physics

I am having so much trouble with this D: A rocket is traveling straight up from its launch pad. An observer 5.00 km from the launch pad notices that at one instant, she must tilt her telescope 45.0 degrees upward to see the rocket. 10.0 seconds later, she must tilt her rocket ...

Math (Confused)

How many international direct-dialing numbers are possible if each number consists of a four-digit area code (the first digit of which must be nonzero) and a five-digit telephone numbers (the first digit must be nonzero)? a. 567,000,000 b. 486,000,000 c. 1,053,000,000 d. 729,...

maths

An ant must walk from one vertex of a cube to the "opposite" vertex (that is, the vertex that is farthest from the starting vertex) and back again to its starting position. It may only walk along the edges of the cube. For the entire trip its path must traverse exactly six ...

Science

Explain the following quote: ... it was several weeks before an emigrant from Earth could adapt to it. On the Moon the human body had to learn a whole set of reflexes. It had, for the first time, to distinguish between mass and weight. A man who weighed one hundred eighty ...

Physics

When dots are placed on a page from a laser printer, they must be close enough so that you do not see the individual dots of ink. To do this, the separation of the dots must be less than Raleigh’s criterion. Take the pupil of the eye to be 2.9 mm and the distance from the ...

government

when the prsident or his designee (usally secretary of states ) negotiates a treaty with a foreign country: A)the senate must approve the document for it to take effect B)both houses of congressmust approve the document for it to take effect. C) only the cabinent must approve ...

physics- i need help ASAP

A ship leaves the island of Guam and sails a distance 265 km at an angle 41.0 north of west. ***In which direction must it now head so that its resultant displacement will be 130 km directly east of Guam? (Express your answer as an angle measured south of east) ***How far must...

physics

A ship leaves the island of Guam and sails a distance 280 at an angle 38.0 north of west.In which direction must it now head so that its resultant displacement will be 115 directly east of Guam? (Express your answer as an angle measured south of east) How far must it sail so ...

physics

A place kicker must kick a football from a point 36.0 meters (about 40yds)from the goal. as a result of the kick, the ball must clear the crossbar, which is 3.05 meters high. When kicked the ball leaves the ground with a speed of 20.0 m/s at and angle of 53 degrees to the ...

physics

Astronomers determine masses of distant objects by observing their smaller companions. For example, they can measure the period of a planet orbiting around a distant star, measure the radius of its circular orbit, and then employ Newtonian physics to determine the mass of the ...

physics

Astronomers determine masses of distant objects by observing their smaller companions. For example, they can measure the period of a planet orbiting around a distant star, measure the radius of its circular orbit, and then employ Newtonian physics to determine the mass of the ...

Physics

On the moon's surface, the force of gravity exerted by the moon on a camera is 2.4 N. What is the force of gravity exerted by the moon on the camera when it is in orbit with a radius = to twice the moon's radius?

Economics

Economics basics Practice 1. How does scarcity affect producers? A- Limited costs prevent producers from hiking prices. B- Limited demand prevents producers from offering low prices. C- Limited time prevents producers from finding the best employees. D- Limited resources ...

Discrete Math

There are 8 black balls and 8 white balls in a box and cannot be seen through: • How many balls must be picked up in order to guarantee there are three balls having the same color • How many balls must be picked up in order to guarantee there are three white balls

english

I need help labeling complements in my sentences. I am not sure if I am doing this correctly or not. Could you please check to see if I have the following parts of speech labeled correctly? I must identify the subject, verb and complements. I must determinit if the complement ...

U.S History

Document A – Statement by Thomas Jefferson (1787) “A democracy is nothing more than mob rule where fifty-one percent of the people may take away the rights of the other forty nine. All, too, will bear in mind this sacred principle that though the will of the majority is in...

Physics

A pilot must fly his plane to a town which is 200km from his starting point in a direction 30degrees N of E. He must make the trip in 1/2 h. An 80km/h wind blows in a direction 30degrees E of S. Find the speed of the plane relative to air. I found the speed of the plane ...

Finite MAth

Assume that the committee consists of 5 Republicans and 7 Democrats. A subcommittee consisting of 6 people is to be selected. (1) How many such subcommittees are possible if each subcommittee must contain exactly 3 Republicans and 3 Democrats? (1) How many such subcommittees ...

Physics

The Nautical Mile is internationally recognised as 1852m which is an approximation of 1' of latitude subtended to the earths surface. However it is an average and the geographical length on the earths surface of 1' of lat subtended will vary according to the radius of the ...

Language Arts

Excerpt from “I Am a Native of North America” by Chief Dan George Man must love fully or he will become the lowest of the animals. It is the power to love that makes him the greatest of them all . . . for he alone of all animals is capable of love. Love is something you ...

history

For a registered political party in a statewide election to gain ballot access, it must do the following except.. - obtain 5 percent of the vote in any statewide election. - voters cannot sign multiple petitions. - collect petition signatures equal to 1 percent of the total ...

Algebra

How to find dimensions of a field when given length of fencing and area? Hi I really appreciate your help on this. The question states that I have a field of area 650 square metres and fencing of 110 metres. I must give 3 possible sets of dimensions of the field and the ...

Astronomy help!

The average speed of stars relative to the Sun in the solar neighborhood is about 20 km/s (this is the speed at which we see stars moving toward or away from the Sun - NOT their orbital speed). Suppose you discover a star in a solar neighborhood that is moving at a much higher...

science

Consider a double star system under the influence of the gravitational force between the stars. Star 1 has mass m1 = 1.72 × 1031 kg and Star 2 has mass m2 = 1.60 × 1031 kg. Assume that each star undergoes uniform circular motion about the center of mass of the system (cm). ...

science

Consider a double star system under the influence of the gravitational force between the stars. Star 1 has mass m1 = 1.72 × 1031 kg and Star 2 has mass m2 = 1.60 × 1031 kg. Assume that each star undergoes uniform circular motion about the center of mass of the system (cm). ...

Math - Magic Square???

My daughter is in 2nd grade and has a worksheet called Magic 26. It wants her to use the numbers 1 -12. Each row, column, and diagonal must equal 26. The four corners and four center numbers must equal 26 too. (example of puzzle below) Please help solve. THANKS!!!!! {____}...

English

I left out these few sentences. Thank you 1) The harvest begins around mid-October; the grapes are collected by hand and laid into boxes. 2) The must ferments 15-20 days in stainless steel vats between 25 and 28°C The elevage in Slavonian oak casks holding from 30 to 60 ...

Ethics (last question)

I'm having a tough time with these two questions. I think I have it, based on the indicator, but I'm not positive that the reason that I listed is correct. Argument: 1) Anything is possible (you agree?) Therefore, it must be possible that something is impossible. This is a ...

math!

You have 48 minutes to take an exam of 21 questions. After you finish the first 10 questions, you realize you must answer the remaining questions twice as fast to finish the exam. How many questions per minute were you answering? Also, how many questions per minute must you ...

writing inequalities

you must have an average score of at least 80 to get a B on your report card. You have scores of 61,70,99, and 70. What is the minimium score you must get on the last test to get a B on your report card? the minimum score you can make and receive an 80 is 100 The minimum score...

English

12. What does the following quote reveal about Montressor’s intentions? "'Pass your hand,’ I said, ‘over the wall; you cannot help feeling the nitre. Indeed it is very damp. Once more let me implore you to return. No? Then I must positively leave you. But I must first ...

SCIENCE

ON A PLANET IN THE YEAR 2000 YOU ARE OBSERVING AMERICA'S BICENTENNIAL CELEBRATION IN BOSTON, MASSACHUETTS. HOW MANY LIGHT YEARS AWAY ARE YOU FROM EARTH. HOW FAR ARE YOU IN KILOMETERS

Physics

When a solar flare erupts on the surface of the sun, how many minutes after it occurs does its light show up in an astronomer's telescope on earth? I am totally confused..help!

Physics

Can someone help me with finding out the magnitude of the gravitational force a person with a mass of 67.5 kg would experience while standing on the surface of Earth? Thanx in advance.

earth

4th grader needs to make a model of earths layers showing crust, mantle, and core. Any ideas? Where would I find a picture?

6th grade

in my workbook it says why do you think earth looks like a blue and white marble from space ? the reason why is because there coler blind PLEASE HELP !!!!

science

which of earth's spheres extends into all others? i think it would be the Biosphere because overlaps virtually the entire hydrosphere and portions of the atmosphere

college

12.2 ft/sec how many days will it take to complete its journey with the circumference of the earth is 25000 miles. How do i work this problem out don't want the answer just want to know how to solve it!

EARTH SCIENCE

Which of the following is NOT considered a form of electromagnectic radiaction? a-radio waves b-gravity c gamma rayas d visible light e- x-rays I think is B

science

A type of igenous rock forming from the cooling of magma within the earth's crust is called_____. a) intrusive b) sedimentary c) metamorphic d) extrusive e) volcanic a

physics

A hypothetical planet has a radius 2.1 times that of Earth, but has the same mass. What is the acceleration due to gravity near its surface? What equation should i use?

Life Sciene

How would the cell theory be affected if scientists could make living cells from carbon, oxygen, and other elements found on earth.

Earth Science

Using the plate tectonic theory explain the differences between the continental shelves on the east and west coasts of South America.

Physics-10

A vehicle that weighs 400N on the surface of the earth is traveling in outer space at a speed of 400m/s. it can be stopped by applying a constant force of 20N for?

earth science

which of the following surfaces would absorb the least amount of insolation? 1. an open field 2. a forest 3. an asphalt parking lot 4. a glacier

geography

Can you please suggest a site where I can go to help me answer this question? My book is not helping! What imaginary lines divide the Earth into the Eastern and Western Hemispheres?

physics

The earth's atmosphere extends to a height of nearby 200KM above its surface there many be explosion and noises taking place in the outer space but we do not hear them.why?

Living environment

1.All of Earth's water, land, and atmosphere within which life exists is known as a population b. an ecosystem c.the biosphere d. a biotic community IS THE ANSWER C

5th grade math

The moon is about 240.000 miles from Earth. What is this distance written as a whole number multiplied by the power of ten?

Earth Science

determine the slope of an area, given the following: Start measuring at 700ft. measure a distance of 4 miles, and end at an elevation of 2432ft

Physics

On some planet other than Earth a ball is thrown upward at a velocity of 22.3 m/s. It returns back to the exact position that it started at in 8.8s. What is this planets value for "g"? (

Science

humans,other mammals,birds can maintain a constant body temperature. why is this a useful adaptation? how does this explain the spread of these animals around earth?

Math

Let d(t) be the shortest distance between Earth and the nearest other planet as a function of time t (where t is in years and t = 0 is noon on January 1, 1000 A.D., say). Is d continuous? Why or why not?

physics

An object is projected upward from the surface of the earth with an initial speed of 2 km/s. The acceleration of gravity is 9.81 m/s^2. Find the maximum height it reaches. Answer in units of km.

earth science

#31 strike slips faults are most likely to occur along which type of plate boundary? a. convergent b. transform c. transcontinental d. divergent

sicence

The following elements as alkali, alkaline-earth or transition metals based on their positions in the periodic table: A:) iron , Fe. C:) strontium, Sr B:)potassium, k d:) platinum, Pt

Environmental Science

On Earth in the extreme northern and southern latitudes, how does the relationship between GPP and NPP change during an entire year’s time?

Intro to Marketing

My instructor wan me to Create a pitch to a potential green-product advertiser stating the benefits of advertising in Mother Earth News.

Environmental Science

On Earth in the extreme northern and southern latitudes, how does the relationship between GPP and NPP change during an entire year’s time?

History help

Weathering and erosion break down rocks and slowly create a) oxygen for plants. b) Earth's poles. c) tectonic plates. d) new landforms.***

Earth Science to Ms.Sue

7.   What gives the gem amethyst its purplish color? A. Quartz B. Titanium C. Oxygen D. Iron The answer was not A, got this question wrong.

Physics

If a person weighs 500 N on Earth, what would she weigh on Jupiter, where the acceleration due to gravity is 26 m/s2? Show all work leading to your answer.

Science

Give two reasons why so little is known about organisms from the Precambrian time, even though it was the longest period and early earth's history?

Science

List at least three atmospheric properties that might change as you traveled from the Earth's surface to space. Temperature, gases, air pollutants?

Basic electricity

A body having a mass of 4.5kg is supported 30kg above earth surface calculate the portential energy take 10kg?

earth science

When I bumped the table, the coffee in my cup spilled out. Newton's _____ law explains this reaction. 1st 2nd 3rd

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