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

25,359 results, page 76

Mathematics--Urgent

Don is planting flowers in the school garden's planter box. The planting are is five and one-half feet long and 10 inches wide. Each plant is 2 inches wide. There must be 8 inches of space between the flowers. What is the largest number of plants he can put into the planter ...

Science Reposted for Jessica

Posted by jessica on Monday, November 19, 2007 at 4:16pm in response to Science. is some friction good for life on earth??

Algebra

Solve the equation w=Cr^-2 The weight of an object follows this equation. Where C is a constant, and r is the distance that the object is from the center of the earth. There are too many variables for me to know where to begin. Can someone get me started?

physics

the north pole of a compass is attracted to the north magnetic pole of the earth, yet like poles reple. can you resolve this apparent dilemma?

Physics

The north pole of a compass is attracted to the north magnetic pole of the earth, yet like poles repel. Can you resolve this apparent dilemma?

world geography

south america has both the wettest and direst places on earth? true or false,(false) i think the united state has both

earth science urgent

in the continental United States, what happens to rain that falls west of the Great Continenetal Divide? Rain that falls east?

PHYSICS

Suppose you are in a spaceship in freefall between Earth and the moon. How could you distinguish between a lead brick and an ordinary brick if you were blindfolded and wore gloves?

Earth Science

Lower case letters that come after the capital letter(s), e.g., KJk, labeling a rock unit represent the rock unit's _

Physics

Physics Help... Applying Newtons Laws Grade 11? On the surface of the earth a geological hammer has a mass of 1500g. Determine its mass and weight on Mars where g=3.6 m/s^2.

physics

Calculate the force of gravity between a newborn baby (mass = 2.6 kg) and the planet Mars (mass = 6.4 * 10^23 kg) when Mars is at its closest to Earth (distance = 5.6* 10^10m).

Science

Express mass of the Earth in unit of M. Take ME = 6 x 1024kg. The apparent magnitude of the sun is £¡ 26.81 and that of another star is£¡1.81. How much brighter the sun is with respect to that star ?

physics

heading due north at 6.00 m/s relative to the water. The local ocean current is 1.53 m/s in a direction 40° north of east. What is the velocity of the ship relative to the earth?

Physics

You weigh 710 N. What would you weigh if the Earth were seven times as massive as it is and its radius were six times its present value? Answer in units of N

Physics!!!!

Assume that a scale is in an elevator on the earth. What force would the scale exert on a 53 kg person standing on it when the elevator slows at 1.77 m/s2 while moving upward?

physics

A student sets up an Atwood machine with a frictionless rope, a 4.5-kg mass, and a 9.5-kg mass. What will be the acceleration of the masses? Use the gravitational acceleration found on Earth: g = 9.8 m/s2.

chem

A weather balloon at Earth’s surface has a volume of 3.9 L at 280 K and 795 mm Hg. If the balloon is released and the volume reaches 4.05 L at 704 mm Hg, what is the temperature? Answer in units of K

Physics Help Please!!!! Check!

if I weigh N on Earth and 5320 N on the surface of a planet, what is the acceleration due to gravity on that planet? mg=702N m=702/9.8=71.6 kg mg=5320N g=5320/71.6=74.3 m/s^2

SCIENCE

The burning of fossil fuels cause the earth to get warmer by putting carbon dioxide in the atmosphere and the carbon dioxide traps heat. MY GUESS: TRUE

astronomy

a light year is a unit of distance most comparable to the distance from earth to what? nearest galaxy nearest star outer solar system

earth/space

Maribel places her backpack and lunch bag on a lab table where there are lab materials. What is the safest way for Maribel to arrange the items?

science

if the mass of the earth is 598*10 to the power of 22km and the mass moon is 7.36*10 to the power of 22kg. calculate the difference in their masses, what is the answer in scientific notation

science

Tom is making the locations of the active volcanoes on a world map. Explain how the locations of the volcanoes are related to earth's plates? please help me im begging you

Science

a stone mass of 2.5kg is falling a certai height. Find the force of attraction between the earth and the stone. Also find its acceleration

Chemistry

Write the symbol for the elements that fit the following descriptions 1. 10 electrons in each -3 ion 2. 18 electrons in each +2 ion 3. The alkaline earth metal in the third period

Physics

A rocket that weighs 7840 N on earth is fired. The force of propulsion is + 10 440N. Determine a) the mass of the rocket, b) the acceleration of the rocket, c) the velocity of the rocket at the end of 8.0 s.

physical science

objects in free fall near the surface of earth experience a. constant speed b. constant velocity c. constant acceleration d. constant distance

Earth Science

Considering the amount of energy required to produce animal-based foods and goods, should humans change their habits so they consume products closer to the bottom of the food chain because it is more efficient? PLEASE HELP.

Earth Space Science

What type of motion would have to occur to move or displace the fixed color lines produced by a gas like helium or hydrogen toward the 400 nanometer mark on the spectrum scale?

Critical Thinking

Which of the following statements is not a claim? A) Life exists on planets other than Earth. B) Dare to stay off drugs! C) Something's force equals its mass multiplied by its acceleration. D) Joe owns a pet dog.

physics

A 33300 lb (earth weight) rocket in outer space has two constant forces acting upon it, F1 = (-166i + 392j) lb and F2 = (50i + -54j) lb. Its initial velocity is (39i + 64j) ft/s. How far is it from where it started after 33 seconds?

physics

A 33300 lb (earth weight) rocket in outer space has two constant forces acting upon it, F1 = (-166i + 392j) lb and F2 = (50i + -54j) lb. Its initial velocity is (39i + 64j) ft/s. How far is it from where it started after 33 seconds?

6th grade

Scientists have calculated that the Moon's revolution around Earth is increasing by about .015 s per century. At this rate, how long would it take the length of a month to increase by one full day?

biology

What geological process is used to explain how nearly identical animals that cannot swim, are found on continents separated by large oceans? What is the half-life of Uranium 238 and what did we use that radioisotope to date as the oldest item on Earth?

physics

Explain why should torques, not forces, play essential roles in the following actions. (a) open or close a door (b) tighten or loosen a screw using a wrench c) "Give me a place to stand, and I shall move the Earth with it"

Language Arts

Which word best describes the tone of the following lines from "New World"? First Man, behold; the earth glitters with leaves; the sky glistens with rain. A. Appreciative B. Disgusted C. Puzzled D. Surprised Is the answer A? Thank you

earth science

During the early Paleozoic era, South America, Africa, Australia, Antarctica, India, and perhaps China comprised the vast southern continent of _____. (1 point) Europe Gondwana Laurasia Pangaea

Science

Sand or gravel that naturally forms near Earth's surface is known as A. pollen. B. ore. C. aggregate. (D. bedrock.) When new clay sediment is deposited on top of old beach material, it's known as A. regression. (B. transgression.) C. progression. D. aggression.

Scienc

The Main difference between terrestrial planets and gas giants is the way they are formed the shape of their obits the level of their density*** the plane in which they lie Where is most of Earth's freshwater located in lakes in rivers in oceans in glaciers***

physics

Two canoeists start paddling at the same time and head toward a small island in a lake. Canoeist 1 paddles with a speed of 1.40m/s at an angle of 45 degrees north of east. Canoeist 2 starts on the opposite shore of the lake, a distance of 1.5 km due east of canoeist 1. A) In ...

science

1.A dog is trained to sit and shake hands. These traits are most likely (1 point) a) inherited b) not inherited*** c) not acquired d) innate 2.In a particular breed of cattle, a black coat is dominant over a red coat. If a cow with a red coat is crossed with a black bull that ...

Microsoft Word file glitch

I must have hit the wrong key. As I was writing a Microsoft Word document, the whole screen changed and now everytime I hit the "Enter" bar, a black Paragraph symbol prints. Each letter has a dot between it as though I am seeing the visual representation for what the program ...

physical science

16. When a bullet is fired from a rifle: mine is D A. the recoiling rifle and the bullet have the same kinetic energy and momentum B. the bullet has greater momentum and kinetic energy than the rifle C. the rifle has greater momentum and kinetic energy than the bullet D. they ...

English thinking

I am looking for why the media does not talk about bird flue , any more? Is there is some reasons why they do not talk about it anymore, do u have any idea? Yes. It does not sell anymore. Media tend to go with sensationalism, and not cover subjects that are well worn. Some of ...

U.S. History

What challenges did the Radical Republicans face during the Reconstruction period? The Radical Republicans fought for political supremacy. They had two main goals: Break the power of wealthy planters who had long ruled the South. Ensure that freedman received the right to vote...

Science

Earthquakes and Seismic Waves •If the statement is true right true if the statement is false change the underlined word or words(I’ll put them in parentheses) to make this statement true.• 1.______The shaking and trembling that results for movement of (rock) beneath ...

Science

How does accuracy differ from precision? Accuracy is how close a measurement is to a generally accepted value. Precision is how many digits the measurement is. My weight is 160 lbs, generally accepted as true. My to scales recoreded my weight as 164lbs, and as 144.432 lbs. The...

Math (PLEASE HELP!)

1. Suppose the height, h, in feet, of a trampolinist above the ground during one bounce is modelled by the quadratic function h(t) = -16t2 + 42t + 3.75 . For what period of time is the trampolinist at least 22 ft above the ground? Round your answers to the nearest hundredth. (...

MAT/117- Appendix E

Answer the following questions. Use Equation Editor to write mathematical expressions and equations. First, save this file to your hard drive by selecting Save As from the File menu. Click the white space below each question to maintain proper formatting. Hint: Pay attention ...

HEALTH HELP PLZ

You have just found out your friend has broken up with a boyfriend or girlfriend. You have always liked the ex-boyfriend (ex-girlfriend) and wonder if you should ask him (her) out. You're not sure how your friend would feel about that. You decide to ask another friend's ...

Physic please check

A house has a floor area of 119 m2 and an outside wall that has an area of 32 m2. The earth's magnetic field here has a horizontal component of 2.1 x 10^-5 T that points due north and a vertical component of 5.0 x 10^-5 T that points straight down, toward the earth. (a) ...

algebra

I am tring to work these out and i have been in this for hours it is not clicking thanks for all the help. the question is: Snookers lumber can convert logs into either lumber or plywood. In a given day, the mill turns out twice as many units of plywood as lumber. It makes a ...

US History

I still don't know about these and I realllyy need to finish this exam, so please help me!! 15. What effect did Supreme Court decisions on apportionment bring about? a. People accused of a crime must be informed on their rights b. Low-cost health insurance must be provided for...

Math

There are 61 known moons. Mercury and Venus do not have moons, but each of the 7 other planets has at least 1. How do I find the % of total moons for each planet? Earth - 1 Mars - 2 Jupiter- 16 Saturn - 18 Uranus - 15 Neptune - 8 Pluto - 1 Thanks for your help.

phyics/moon

The acceleration due to gravity on the Moon's surface is one-sixth that on Earth. What net force would be required to accelerate a 20-kg object at 6.5 m/s2 horizontally on the moon? A) 1.3 N B) 20 N C) 33 N D) 120 N E) 130 N

Business math

PROBLEM 1 The video discusses the requirements of a package to qualify as freight. A package must weigh at least 151 pounds. It must be palletized, stackable, forklift-friendly and shrink-wrapped or banded for stability. The uniform cargo footprint can be no larger than 16 ...

physics

You let out a shout, echo comes back and reaches you in 1.4 seconds. if the speed of sound in air is 343 m/s, what is the distance to the cliff? a. need assitance in setting up problem? Let d be the distance to the cliff, and V be the speed of sound. The sound must travel a ...

Environmental Science

Earth's surface water is found in a.lakes b.rivers c.streams d.all of the above I picked d. because that's where SURFACE water is at right? yup ditto.....

earth science

what are the main differences between a chain formed at a divergent plate boudary and those developed at convergent plate boundaries? explain the differences

earth science!!!

what are the main differences between a chain formed at a divergent plate boudary and those developed at convergent plate boundaries? explain the differences

earth science

1) What has happened to the ice in Greenland? What does Gore say will likely happen? 2) How high does Gore say sea level will rise if nothing is done? In how many years?

Physics

An airplane pilot tries to fly directly east with a velocity of 800.0 km/h. If wind comes from the southwest at 80.0 km/h, what is the relative velocity of the airplane to the surface of Earth?

Chemistry

A weather balloon at Earth's surface has a volume of 4.00 L at 304 K and 755 mm Hg.? If the balloon is released and the volume reaches 4.08 L at 728 mm Hg, what is the temperature? What gas law do you use?

EARTH SCIENCE

Discuss the distribution of seafloor sediments in the ocean basins. What are the different types of sediments? What are the factors that control their distribution (geologic setting, climate, etc.)?

EARTH SCIENCE

Discuss the distribution of seafloor sediments in the ocean basins.What are the differents types of sediments? What are the factors that control their distribution(geologic setting climates, etc)?

science

When any spot on the surface of the earth faces the sun, that spot is dark it is night. true false Just need to know if my answer or right or wrong. Thanks! :) false

physics

A person is standing at the edge of the water and looking out at the ocean. The height of the person's eyes above the water is h = 1.6m. and the radius of the earth is R = 6.38 X 10^6 m. (a) How far is it to the horizon?

Earth/Environmental Science

_______ currents are currents that involve warm water flowing in different directions at different speeds close to the top of oceans.

Physics

A stationary 25kg object is located on a table near the surface of the earth. The coefficient of kinetic friction between the surface is 0.30. Determind the acceleratin of the object.

Physics

A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 4.6×10−5 rad. 1. What diameter spot will it make on the Moon?

Astronomy

Where do you have to be on the Earth to see the Sun at your zenith? If you stay at one such location for a full year, on how many days will the Sun pass through the zenith?

PHYSIC

THE MOON ORBITS THE EARTH AT A SPEED OF 1.02 KILOMETERS PER SECOND. USE DIMENSIONAL ANALYSIS TO CONVERT THIS SPEED INTO MILES PER HOUR.

earth/atmosphere

my homework says a,b,and c represent gases what is a? a has 78.09 present by volume and i need to know what gas a stands for....i thought it was argon but argon is already a gas listed...HELP

physics

Calculate the force of gravity between a newborn baby (mass = 2.6 kg) and the planet Mars (mass = 6.4 * 10^23kg) when Mars is at its closest to Earth (distance = 5.6 * 10^10m).

physics

A person can jump a horizontal distance of 2.59 m on the Earth. The acceleration of gravity is 11.8 m/s2 . How far could he jump on the Moon, where the free-fall acceleration is 0.297g? Answer in units of m

Physics

The sun is 1.40•10^11m away and light travels at 3.00•10^8m/s. Calculate how long it takes light from the sun to reach the earth. Express your answer in scientific notation.

Physics

The sun is 1.40•10^11m away and light travels at 3.00•10^8m/s. Calculate how long it takes light from the sun to reach the earth. Express your answer in scientific notation.

Physics

The sun is 1.40•10^11m away and light travels at 3.00•10^8m/s. Calculate how long it takes light from the sun to reach the earth. Express your answer in scientific notation.

Physics

The sun is 1.40•10^11m away and light travels at 3.00•10^8m/s. Calculate how long it takes light from the sun to reach the earth. Express your answer in scientific notation.

physics

The Earth has a radius of about 6.38 ´ 103 kilometers at the equator and rotates 360° every 24 hours. The angular displacement of a person standing at the equator for 8.0 hours is:

physics

Suppose the Sun is 1.52669 × 108 km from Earth. The speed of light is 2.99792 × 108 m/s. How long does it take for its light to reach us? Answer in units of min

Physics

Calculate the force of gravity between a human child (mass = 38 kg) and the planet Mars (mass = 6.4 1023 kg), when Mars is at its closest to Earth (distance = 8. 1010 m).

Physics

A track star in the long jump goes into the jump at 12 m/s and launches herself at 20.0° above the horizontal. How long is she in the air before returning to Earth? (g = 9.81 m/s2)

Science

Without newtons second law would there be gravity on earth??????? Help!!! And also how are newtons second and third laws of motion important to your everyday life?

physics

Calculate the mass of Jupiter knowing that a person who weighs 490 N on the earth's surface would weight 1293 N on the surface of that planet. Jupiter has a radius of 7.15 × 10^7 m.

SS PLZ HELP ME ASAP

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

Earth Science

Compared with dull and rough rock surfaces, shiny and smooth rock surfaces are more likely to cause sunlight to be… my answer is reflected. Am i right?

Science

Tomorrow I have the midterm (Lab-Earth Science) on 1 Minerals Igneous Rocks Sedimentary Rocks 2 Topographic Maps 3 Geologic Time Help with this, please.

Science

If the acceleration gravity is 1.6m/2 on the moon and you weigh 539 N on earth, how much do weigh on the moon?

physics 12

If the Earth has a mass of 5.98*10^24 kg and orbits the Sun at a radius of 1.43*10^11 meters. Find the mass of the Sun. Thank you.

science

Imagine that you were on the moon (which has an acceleration rate 1/6 that of earth's 9.8 m/s) What would it's gravitiational acceleration rate be?

Physics

The weight of a rock on the moon is 0.85 N. If acceleration due to gravity on the moon is 1.7 m/s2, what will be its weight on the earth

Physics

The weight of a rock on the moon is 0.85 N. If acceleration due to gravity on the moon is 1.7 m/s2, what will be its weight on the earth

Science

A 13.0 kg block of concrete rests on a 5 cm by 2 cm board. What is the acceleration of the block of concrete here on Earth?

maths

the longest and shortest distance of eareth from sun are r1 and r2. what is the distance of the earth from the sun when it is perpendicular to it

**WORLD GEOGRAPHY 30**

Which of the following statements is not true? a) rural settlement is north america is primarily dispersed. b) agglomerated rural settlement is most commong in the world. c) the agglomerated pattern exists in lands colonized by europeans. d) an agglomerated village can be ...

Physics

7. Which of the following object(s) would be suitable for building a functional clock? Note: you must clearly mark your answer (for example, highlight it in red) from the multiple-choice list below and you must provide an explanation of your answer(s) to receive credit. Review...

English

A character who is depicted realistically and has his or her own personality and history in a story is what type of character? A. Individuated B. Main == C. Modern D. Representative Which of the following is not considered a level of setting in a story? A. Supernatural B. ...

Art

Could you please tell me which alternatives are possible? Thank you, Writeacher. 1) You usually ....... be at the airport two hours before your flight leaves. (have to; not must or should). 2) At most schools students can go on .... (a trip/on trips) (are both possible?) with ...

Physics

A helicopter is ascending vertically with a speed of 5.20 m/s. AT the height of 125m above the earth, a package is dropped from a window.How much time does it take for the package to reach the ground. ****Note: Please show the steps.

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