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

25,143 results, page 59

PHYSICS1

A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.90 s, it is at point (5.30 m, 5.30 m) with velocity (2.20 m/s) and acceleration in the positive x direction. At time t2 = 14.0 s, it has velocity (–2.20 m/s) and ...

physics

A particle moves along a circular path over a horizontal xy coordinate system, at constant speed. At time t1 = 4.60 s, it is at point (4.30 m, 6.20 m) with velocity (3.30 m/s) and acceleration in the positive x direction. At time t2 = 13.0 s, it has velocity (–3.30 m/s) and ...

physics

Two stars in a binary system orbit around their center of mass. The centers of the two stars are 7.78x1011 m apart. The larger of the two stars has a mass of 4.19x1030 kg, and its center is 1.75x1011 m from the system's center of mass. What is the mass of the smaller star?

sociology

Focus of the Research Paper Select one social institution family, health-care, religion, education, mass media, political, or economic (family being my choice) as defined in the text. Using the three Sociological theories listed in chapter one of the text (Functionalism, ...

Grammar

Write three sentences that use an apostrophe correctly. One sentence must use an apostrophe with a plural noun that ends in "s". The other two sentences must use the apostrophe in two different ways. 1. Tom’s room is unorganized. 2. I believe Americans’ should never use ...

computer programming

Create the logic for a program that accepts input values for the projected cost of a vacation and the number of months until vacation. Both values must be greater than zero. Pass both values to a method named displaySavingsAmt(cost, months) that displays the amount you must ...

Statistics

The Tyco Video Game Corporation finds that it is losing income because of slugs used in its video games. The machines must be adjusted to accept coins only if they fall within set limits. In order to set hose limits, the mean weight of quarters in circulation must be estimated...

physics

Part of a roller-coaster ride involves coasting down an incline and entering a loop 27.0 m in diameter. For safety considerations, the roller coasters speed at the top of the loop must be such that the force of the seat on a rider is equal in magnitude to the rider’s weight...

Calculus

Let f be a function defined for all real numbers. Which of the following statements must be true about f? Which might be true? Which must be false? Justify your answers. (a) lim of f(x) as x approaches a = f(a) (b) If the lim of f(x)/x as x approaches 0 = 2, then f(0)=0. (c) ...

IPC

The latent heat of vaporization of ethanol is 200 calories/gram. This means that _____. a) about 200 calories of heat must be added to 1 gram of ethanol to change its temperature b) about 200 calories of heat must be added to 1 gram of ethanol to convert it from a solid to a ...

Physical Science

My homework is to do some exercises on the Foucault Pendulum. I'm stuck on several of the problems. One is to find the approximate angle of rotation of the earth in one day at our latititue, which is 39.9. I found the equation n = 360 sin of latitude, but I have no idea how to...

Math(1 question plz help thanks!=D

if two integers have the same absolute value which of the following is true about the integers? A. they must be the same integer B. they must be the opposite integer*** C. they could be the same or opposite integer (plz help my answer is with the***sign thanks!=D

kw university

You want to get an idea of the magnitude of magnetic fields produced by overhead power lines. You estimate that a transmission wire is about 11 above the ground. The local power company tells you that the line operates at 16 and provide a maximum of 83 to the local area. ...

Single Room, Earth View by Sally Ride--Help!

This regards the story "Single Room, Earth View" by Sally Ride. Choose one of the following quotations; then in a few paragraphs, discuss how Sally Ride's observations support or refute the quotation. Quotations: 1. "Observation is a passive science, experimentation is an ...

PHYSICS

A long-straight wire carries a current and is aligned with the North-South direction. You place a compass 4 cm directly above the wire and above the North/East/South/West plane. The compass needle, which initially pointed North (far away from the wire) is now deflected by 20o ...

Physics

In the Bohr model of the hydrogen atom, the speed of the electron is approximately 2.41 × 106 m/s. Find the central force acting on the electron as it revolves in a circular orbit of radius 4.92 × 10−11 m. Answer in units of N. i used 9.10938188 × 10-31 as my mas and ...

physics

It has been suggested, and not facetiously, that life might have originated on Mars and been carried to Earth when a meteor hit Mars and blasted pieces of rock (perhaps containing primitive life) free of the surface. Astronomers know that many Martian rocks have come to Earth ...

Physics

1. The problem statement, all variables and given/known data The asteroid Icarus, though only a few hundred meters across, orbits the Sun like the other planents. Its period is about 410 d. What is its mean distance from the Sun? 2. Relevant equations Keplers Law T_1 ^2 / T_2...

HELPPPP NOOWW !!!!!

Type the pronoun that correctly completes the sentence. Remember that you must spell your answer correctly to receive credit. Yes, the one who designed the house was (she, her). (Points : 1) Question 2. 2. Type the pronoun that correctly completes the sentence. Remember that ...

Chemistry

The general statement: "like dissolves like" means: identical compounds will dissolve to form a solution. one stronger component must beak down the weaker component. liquids will only dissolve in liquids. solid will dissolve in liquids. the components of a solution must have ...

calc

one more question!! what values of c deos the polynomial f(x) = x^4 + cx^3 + x^2 have two inflection points? one inflection point? At the inflection point, the slope of the curve is zero. Find the dervative of f(x) and set it equal to zero. For certain values of c, there will ...

Physics

A river flows due south with a speed of 2.00 m/s. A man steers a motorboat across the river; his velocity relative to the water is 4.20 m/s due east. The river is 800 m wide. What is the magnitude of his velocity relative to the earth? got it....4.65 m/s What is the direction ...

Physics

If two identical bowling balls are raised to the same height, one on Earth, the other on Mars, which has the larger gravitational potential energy increase? A)The bowling ball on Mars will have the larger gravitational potential energy. B)Both balls will have the same ...

science

how the earth rotates by itself? Momentum imparted to it million of years ago when the solar system formed. One theory involves glancing collision with a large asteroid millions of years ago that also broke off material that eventually developed into the moon. I hope this ...

physics

One of the tenets of the pseudoscience (i.e., "false science") of astrology is that, in some mysterious way, the positions of the planets at the time of a person's birth somehow influence the characteristics of that person. To see if this proposition seems plausible, let us ...

science

can u explain the wter cycle for me ? i wonder what precipitation means? http://www.onelook.com/ Type precipation in that window http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Watercycle.shtml

maTH

The owner of Campus Cafe plans to open a second location on a satellite campus in 5yrs. She buys an annuity that pays 10.5% interest compounded annually A. If the payment is $4000 a year, find the future value of the annuity in 5yrs. B. How much more interest would be earned ...

physics!

A place kicker must kick a football from a point 36 m from the goal, and the ball must clear the crossbar, which is 3.05m high. When kicked, the ball leaves the ground with a speed of 20.0m/s at an angle of 53 degrees to the horizontal. a. by how much does the ball clear or ...

Chemistry

Select the two conditions that must be met by a thermochemical equation so that its standard enthalpy change can be written as ÄfH°. a) One mole of each reactant is used. b) All substances are at 0°C and 1.013x105 Pa pressure. c) The reactants are found in their standard ...

geology

1. What fraction of the Earth is made up of each of the major compositional layers: core, mantle, and crust? 2. What cities lie the same distance from our town as the boundaries of the following layers in the Earth lie from the solid surface? a. Base of oceanic crust or top of...

scientific notation?

A) light travels at approximately 186,000 miles per second. approximately how far will it travel in 1 minute? express your answer in scientific notation B) the sun is approximately 93,000,000 miles from the earth. about how long does it take light to travel from the sun to the...

L.A.

Be still, sad heart! and cease repining; Behind the clouds is the sun still shining; Thy fate is the common fate of all, Into each life some rain must fall, Some days must be dark and dreary. –from “The Rainy Day” by Henry Wadsworth Longfellow In the excerpt, what type ...

Math

Solve the given equation in the interval [0,2 pi]. Note: The answer must be written as a multiple of pi. Give exact answers. Do not use decimal numbers. The answer must an integer or a fraction. Note that pi is already provided with the answer so you just have to find the ...

Math(algebra)

If you had to start and finish at the same line of a racetrack, which lane would you choose? The inside lane has an obvious advantage. for a race to be fair, runners in the inside lanes must be given head starts. Design a four-lane oval track with straightaways and ...

Math statistics

For a certain computer program a password must be exactly 5 characters long. The first character must be a mnber 0-8, the second, third and fourth character can either be one of the 26 letters or a number 0-5, the fifth character has to be exactly the same as the second ...

Algebra 1

What is the solution to the system? use elimination . -18.6x+ 17.2y=90.2 14.2x+ 3.4y= -35.8 a.(3,2) b.(-3,2) c.(2/3,4/9) d.(2,3) IS IT D?? Terry and ed start a lawn mowing business and purchase mowers and equipment for $800. They charge $20 for each lawn and $4 worth of gas ...

Algebra 1

What is the solution to the system? use elimination . -18.6x+ 17.2y=90.2 14.2x+ 3.4y= -35.8 a.(3,2) b.(-3,2) c.(2/3,4/9) d.(2,3) IS IT D?? Terry and ed start a lawn mowing business and purchase mowers and equipment for $800. They charge $20 for each lawn and $4 worth of gas ...

Language

People have been making maps for hundreds of years. Christopher Columbus used maps when he sailed to the "New World." At that time, most people thought Earth was flat, and all of the maps they used were flat, too. Of course, Columbus's maps were not accurate, but would you be ...

Physics

planet orbits a star once every 2.84 10^7 s in a nearly circular orbit of radius 1.42 10^11 m. (a) With respect to the star, determine the angular speed of the planet. (b) With respect to the star, determine the tangential speed of the planet. (c) With respect to the star, ...

LA - help, thnx

Which of the following quotes from the text best reveals Windrider’s approach to living? a. “I don’t know much about being a father.” b. “It’s hard to put things into a letter, especially when the letter is read to your family by another person.” c. “Then ...

stats

Katie must take five exams in a math class. If her scores on the first four exams are 77, 79, 95, and 93, what score must Katie get on the fifth exam for her overall mean to be at least 80? The maximum score on an exam is 100 points. If it is not possible for Katie to achieve ...

Math

5. Which of the following statements is NOT true regarding an expression written in scientific notation in the form of a x 10^n ? A.)The value of "A" must be greater than or equal to 1 and smaller than 10. B.)The value of "N" must be an integer. C.)Doubling "N" results in a ...

Math help

Which of the following statements is NOT true regarding an expression written in scientific notation in the form of a x 10n ? A.)The value of a must be greater than or equal to 1 and smaller than 10. B.)The value of n must be an integer. C.)Doubling n results in a doubling of ...

science

What is the gravitational potential energy of a 2kg ball on planet earth raised 15 meters in the air?

earth`s changing surface

land formed by a river`s deposition of eroded soil and others materials

geophysics

how would you exaplain how and why each of the four moon phases appear to look like they do to us here on earth?

earth science

Hello another question: why is yellowstone national park thought to be significant relative to volcanoes. thanks

SCIENCE

ARE ANY OF THE 9 PLANETS WITHIN OUR SOLAR SYSTEM A LIGHT YEAR OR MORE AWAY FROM EARTH?

Earth Science

Clouds will from when condensation nuclei are present and: air reaches its dewpoint. is that all true?

sci

why does the earth cool off at night much more quickly when the sky is clear than cloudy

Science

How do you think the changing environment of the earth influenced the adaptations that allowed a class of vertebrates to thrive?

science..help

name a rock composed of mostly plagioclase and pyroxene that has formed deep within the earth.

astronomy/physics

determine the mass of the earth from the known period (365.25 days) and the distance of the moon (3.84X10^3 km)

science

Does the total amount of oxygen adoms on the earth increase or decreace over time? Explain.

science245

In genology (the earth) what are the two historical figures and the process of mantle convention and plate movement.?

geology (science)

how does the earth's four subsystems (lithosphere, hydrosphere, biospehere, atmosphere) interact with one another?

science

what is the largest layer of earth's surface , composed mostly of silicon,oxygen,magnesium,and iron

Biology

Which is the most common complex carbohydrate on earth? A. Starch B. Glycogen C. Cellulose D. Hemicellulose E. Chitin

marine science

how does the earth redistribute the uneven amount of solar energy received by earths surface

physics

estimate the rotational kinetic energy of earth, assuming it to be a solid sphere of uniform density

physics

Calculate the force of gravity on a spacecraft 12800 km above the earth's surface if its mass is 700 kg.

science

suppose an asteroid of radious 50m strikes the earth surface,what could be the impact of such collision

*Science*

Are meteroties large lumps of trapped rock/metal which actually reach the earth's surface?

science

if something big from outerspace hit earth, then where would it have least human impact?

physics

The force produced by Earth's gravity on a 70 kg man standing on the moon is more than 0.5 N True or False?

science

The______ is the center of the moon's shadow where the sun's light is completely blocked from view on earth.

EARTH SCIENCE

A dark gray cloud that blankets the sky and often generates precipitacion is called

Chemistry

Gas particles are not found in which layer of Earth's atmosphere? A. exosphere B. mesosphere C. thermosphere D. magnetosphere I know it's not A.

science

The moon revolves around the____. Just need to know if my answer or right or wrong. Thanks! :) earth

science

The moon revolves around the____. Just need to know if my answer or right or wrong. Thanks! :) Earth

social studies

What do you call maps thatshow features that humans have created on Earth's surface?

SCIENCE

The smallest of the earth's oceans is the _______ Ocean a) Pacific b) arctic c) indian d) atlantic e)lagon B

Astronomy and Space

Using a telescope, which planets acn be observed from Earth in a crescent moon phase?

Science

Give an example of how animal behavior would chnge if the Earth become hotter in the future.

10th grade

A metroid entering Earth's atmosphere has a speed of 70.0 km/s and a kinetic energry of 2.56 X 10^15 J. What is the mass of the meteroid?

earth science

what kind of air mass weather is likely to follow the passing of a warm front?

astronomy

Fill in the blank: The Earth may have gained its water and volatile gases from collisions with _______ .

physics

If a man weighs 853.0 N on Earth, what would he weigh on Jupiter where the acceleration due to gravity is 25.4 m/s2?

physics

If a man weighs 853.0 N on Earth, what would he weigh on Jupiter where the acceleration due to gravity is 25.4 m/s2?

Chemistry

Why are the alkali and alkaline earth metals more reactive than other elements on the periodic table?

Plate Movement

What parts of earth's interior are involved in a convection current? The mantle. Core. Is that right?

science

how do hydrogen bonds relate to the transfer off heat from the equator towards the poles of earth

english

To no man does the earth mean so much as to the soldier. what type of rhetorical device does this sentece contain

Physics

What thrust does a 350 model rocket need in order to have a vertical acceleration of 14.0 on the Earth?

English

Which of the following should NOT be capitalized? A. Europe B. the Earth C. Far East D. the South Atlantic I think it's B?

4th Grade Science

How much time will it take for Earth to reach the opposite side of the Sun?

science

how long does it take for the Earth to rotate on its axis 7 times 1day 1 week 1month or 1 year?

astronomy

the radius of earth is 4000 miles, how far would you travel in going around the equator?

Earth Science

What are FIVE tools that we use to help us extend our senses when making quantitative observations?

Physics/Science

Why would someone using a Foucault Pendulum at the equator say that Earth does not rotate?

Science

How would earth move if the sun including its gravity suddenly disappeared? Explain your answer.

science

if Earth's axis were not tilted,could any area have both a hot summer and a cold winter?

Earth Science

Describe how the principle of superposition was used in determining the relative ages of the cross-sections?

biology

briefly describe the basic characteristics that all living things on earth have in common

solid geometry...

find the area of the earth's surface within the Arctic Circle; that is, in latitude north 66° 32' N. thank you! :D

Biology 1

Briefly describe the basic characterisitics that all living things on Earth have in common.

earth science

A swimmer completed the 1,500 meter freestyle in 625 seconds. What was his average speed?

earth Geology

This is just a question that I was curious about, why do mountain belts run parallel to coastlines? Thanks

earth science

according to the condensation theory the most important factor for the formation of our planet was

Physics

How far above the surface of the earth would you have to be before your weight is reduced by 12.89%? Please Help !

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