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

25,161 results, page 68

physics

An engineer uses a bolt to connect a joint. The force provided by the bolt F is a function of the external load P that it must bear. The bolt applies a force of 200 lb against an external load of 100 lb. The same bolt must apply a force of 400 lb against an external load of ...

Social Studies

My most exalted Monarch - Your Majesty Queen Isabella, I am writing this letter most humbly for you to consider my request for three small ships and a crew so that I may sail west and find the shortest route to the East. I promised to chaim land for Spain and bring back riches...

Technology

According to Alan Durning, the basic value of a sustainable society is: A. that any society's consumption levels must be tied to locally available resources. B. each generation should meet its needs without jeopardizing the prospects of future generations to meet their own ...

Business Communication

You ask for feedback on a proposal and are told "I don't believe your claims. Your facts must be wrong." You are confident that your facts are indeed correct. You should: a. write a memo to the proofreader's supervisor before sending the final proposal b. make your claims more...

Statistics

The weight of bags of pretzels are normally distributed with a mean of 150 grams and a standard deviation of 5 grams. Bags in the upper 4.5% are too heavy and must be repackaged. Also, the bags in the lower 5% do not meet the minimum weight requirement and must be repackaged. ...

Math

1. The US Senate is composed of 2 senators from each of the 50 states. For a treaty to be ratified, at least two-thirds of the senators present must approve the treaty. Suppose all senators are present and 48 of them have voted in favor of a treaty. What are the possible ...

visual basic programming

Write a Visual Basic program that will calculate the assessment marks of a student taking the Computer Programming subject in College. The program must be able to determine the total result and finally display the grade of that student. The program will also ensure that each ...

chemistry

2. A researcher is often required to prepare solutions in the lab. Typically, a lab provides a concentrated solution. This solution must be diluted to the proper concentration. Hydrochloric acid is a common stock solution that is typically purchased at 37.0% HCl concentration...

Physics

As a civil engineering intern during one of your summers in college, you are asked to design a curved section of roadway that meets the following conditions: When ice is on the road, and the coefficient of static friction between the road and rubber is 0.077, a car at rest ...

calculus

A dam 15 m high holds the water in reservoir . For safety reasons , the water level is maintained at a height 3 m below the top of the dam. At best of the dam , engineers have installed a vertical door in the shape of an equilateral triangle with sides of length 3 m , ...

Inter. Algebra

what is the answer to 2 square root of 18x? Do you mean 2*(18x)1/2? What does it equal. What are we to do with the problem? DrBob222, My problem states 2 square root sign & 18x underneth it. If you could help me with this problem I'd really appreciate it. It must be equal to ...

physics

I am helping my friend move into his new apartment. During the move, we have to load boxes into the back of his truck. To make it easier to load them, we've set up a metal ramp so that we can slide the boxes up to the deck of the truck. The box shown in the figure has a mass ...

Earth Science

A seismograph station is located 2000 km from an earthquakes epicenter. Explain the order that the S and P waves will arrive at the station.

Geometry

how do you make a sketch of the earth, moon, and sun during a solar eclipse so that your sketch contains similar triangles?

physics

what happen to the value g (free fall). If the rocket has launch from Earth to moon with the constant velocity. What if the rocket acclerating?

earth science? volcanoes

what kind of volcanoes are found in Iceland? Chile and Argentina? The Arabian Peninsula and the Middle East? thanks

earth science

how do i find how much water vapor is in the air when given relative humidity and an air sample that is 40 degrees C?

english

The cheetah has a thin elongated body and is said to be the fastest runner on earth. in the above sentence, runner is a noun or not

physics

If a mole of atoms were spread uniformly over the surface of the Earth, how many atoms would there be per square meter?

physics

A 2-kg block rests on a wall that is 3 m tall. What is the gravitational potential energy of the block? The force of gravity on Earth (g) is equal to 9.8 m/s2.

physics

The distance from the center of the earth to a point where the acceleration due to gravity is g/16 is none of the these. 4RE. 3RE. 16RE. 1/4RE.

Science

Trying to complete a word search. What is a 6-letter word for "State of water that is most common on Earth's surface"

physics

a projectile is fired in the earth's gravitational field with a horizontal velocity of v=9.00 m/s. How far does it go in the horizontal direction in 0.550 seconds?

science

The deepest layers of the earth is called the inner Just need to know if my answer or right or wrong. Thanks! :) inner core

earth science

What forces are opposing on one another throughout the life of a star and how do they influence the various stages in the life cycle?

science

when brought to the surface of the moon will a mass have more or less weight than it did on the surface of earth or stay the same ?

Earth Science

Please determine the noon sun angle at the given latitudes on April 11: 40 degrees north 0 degrees

science

if an astraunout could jump 40 cm on jupiter how high could he ir she jump on earth how about the moon also????? pleese help me im stuck on this question

science

if you weigh 100 pounds on earth than how much would you weigh on each other planet in our solar system

physical science

At the bottom of a well one quarter of radius of the earth deep your weight compare to your normal weight would be

physics

How high above the earth’s surface would you have to be before your weight would be only 0.6 its current value?

mechanics

at what altitude above the earth's surface is the free fall acceleration equal to three quarters of its value at the surface ?

earth

If a person has a weight of 145 lb at sea level, by how much is their weight reduced when flying on an airplane at an altitude of 10700 m?

PHYSICS

Find the period time of the moon from the following values, R=6400km,the distance between the earth and the moon=384000km,g=9.8m/s2

Earth Science

If you started with 100 grams of Potassium-40 how much would reamin Potassium-40 after 3.9 x 10 to the 9th years?

Earth Science

Environmental Sustainability” refers to the ______________ of vital human ______________ support systems. fill in the blank

Math

the speed of a point A due to the rotation of the earth is twice that point of B.if A is on latitud 22 degree to the north calculate the latitude of B

earth

i have an acrostic poem i have to do for school on describing warm and cold fronts, but i can't think of some of the words

PHYSICS

Estimate the length of venusian year using the fact that the earth is 1.49*10'8km and venus is 1.08*10'8km from the sun on average.

astronomy 101

Given that the angular size of Venus is 53ŒŒ'' when the planet is 47000000kmkm from Earth, calculate Venus's diameter (in kilometers).

physics

A (1.35x10^2) kg box is falling near Earth’s surface. It is accelerating at (7.3000x10^0) m/s^2 [D]. What is the force of air resistance on the box?

Earth Science

What color will a star be with a surface temperature of 5000–6000 K? A. blue B. yellow C. white my choice is B yellow

Chemistry!

1. If the distance from the earth to the moon is 3.82 x 10^8 m, how many times could the paper stack reach to the MOON AND BACK? 1 mole of papers=1.505E20

Science

About what percent of all of Earth's fresh water is found in ground water, streams, lakes, and rivers?

Physics

The average distance of sun is 1.496 ×10^11m from the earth.Express the distance in light year and par second.

earth and science

what continent lies between 20 and 60 degress north lattitude and between 160 and 50 degrees west longtitude

Physics

At what altitude above the Earth's surface is the gravitational field strength equal to g/7? .981 = -(1.0003322(6,371/6,371+h))^2)

earth science

What does -morph stand for in science terms?

Science

Why is the earth's temperature different in different places?

math

If I am 11 years old on Earth,how old will I be in Mercury?

earth

the blank is located between the island? what is in the blank?

earth and space

the grams on the moon is different then space ?

physics

How does your mass on Earth compare to your mass on Mars?

Science

If a man has a mass of 90 kg on earth, what is his mass on the moon?

earth

how does the water cycle ensure that we have water.

Geography

which layers of the earth move? Why do ther move?

earth

What is an elipse of the sun and what is lunor elipse of the moon

Science

what the definition of age range in earth science?

Orbital Mechanics

Some help with this exercise please. If you could give an explanation and not only the answers it would be great!!! Besides the 3-2-1 rotation sequence, another very common sequence in spacecraft applications is the 3-1-3 rotation sequence in which the z axis is used twice. ...

physics

A stunt driver wants to make his car jump over eight cars parked side by side below a horizontal ramp. (a) With what minimum speed must he drive off the horizontal ramp? The vertical height of the ramp is 1.5m above the cars, and the horizontal distance he must clear is 20m. (...

English

I included the things I really didn't know. 1) May I borrow your high heeled shoes? (Give permission) Yes, you can (may?) 2) keep far (move away, stay away are possible?) from rocks and trees. 3) Hamlet doubts whether or not to kill Claudius. 4) The theme of false appearances ...

Chemistry

Can u help me in balancing the following eqn. through oxidation no. method or half reaction method. Also please show and explain the steps. HNO3(aq.) + KI(aq.) -----> NO(g) + I2(s)+ H2O(l) + KNO3(aq.) Hoping for a quicker response. I goes from -1 to 0 N goes from +5 to +2 ...

Physics

(1) A virtual image -7 cm tall and 17 cm away from a mirror is created by an object 7 cm away from a mirror. How tall is the object? What kind of mirror created the image? What is its focal length? (2) If a 1.75 m tall man is looking at a plane mirror from an eye which is 15 ...

Physics

(1) A virtual image -7 cm tall and 17 cm away from a mirror is created by an object 7 cm away from a mirror. How tall is the object? What kind of mirror created the image? What is its focal length? (2) If a 1.75 m tall man is looking at a plane mirror from an eye which is 15 ...

science

can you please help me put these events in order from latest to earliest?: -pangea, the supercontinent, begins to divide -trilobites -dinosaur extinction -first crocodiles -archaeopteryx (early bird) -first flowering plants -protozoa (single-celled, microscopic animals) -first...

ap chem

A mole of helium gas contains 6.02x10^23 helium atoms. How many helium atoms are there in a micromole of helium? How many moles of helium does 1.25x10^20 atoms of helium represent? ~I have no idea how to start or what the value of a micromole is? Constructive help would be ...

Logarithmic Function

A spacecraft is approaching a space station that is orbiting Earth. When the craft is 1000 km from the space station, reverse thrusters must be applied to begin braking. The time, t, in hours, required to reach a distance, d, in km, from the space station while the thrusters ...

Criminal justice

1. Which of the following is one of the limitations placed on felony murder? A. The felony must be independent of the homicide. B. The rule is limited to inherently dangerous felonies. C. The felony and the homicide must accompany each other in close temporal proximity. D. All...

Math

If y = sin−1 x, then sin y = x,−π/2 ≤ y ≤ π/2. Therefore, to find y = sin−1(−3/22, we must find an angle y whose sine is -3/2. There are many possible angles with this sine, but the range of y = sin−1 x is restricted to...

Abnormal psychology

what are the tenets of pharmacology I found more then three "basic tenets of pharmacology" online: The dose should be no larger than that necessary for the desired effect The drug molecules must get so close to the cellular molecules that the function of the latter is altered ...

geometry

If a rectangular solid has a volume of 27 and at least one edge the length of 3,which of the following Must be true? My thoughts lead me to think D is the answer,but I,m not sure?? a.The solid is a cube b.Exactly 4 edges of the solid have a length of 3 c.Exactly 6 edges of the...

Science (again)

Can Somebody plz help me with me question below, I didn't really get Mr. James's explanation for further reading. Precession means the axis of the Earth is changing, so North changes.

science

what site would i go to to summerize the climate changes that have accured from the past to the present and predict what you think the Earth will look like into the 21st. century????

earth science

Most New York State sandstone bedrock was formed in a delta from sand grains deposited, buried, and cemented together by minerals. Explain.

Physics

If a 20 kg object fell to the surgace of the Earth from a height of 30m, what would its final velocity be? (work from the energy standpoint) I know that you said it is F * X and I'm just confused. Can you help me walk through this?

Physics Problem 6.12

Estimate the acceleration due to gravity at the surface of Europa (one of the moons of Jupiter) given that its mass is and making the assumption that its density is the same as Earth's

SCIENCE

The earth is a______.It has four different layers, some thicker than others.? a) spiral b) rotunda c) sphere d) globule Just need to know if my answer or right or wrong. Thanks! :) C

Astronomy

Imagine that the Earth's axis were tilted parallel to the ecliptic plan like that of the planet Uranus. Describe how the seasons would be different in this scenario than what we currently experience.

earth

A cold front traveling at an average speed of 35 km/h eastward is 280 km due west of you. Appoximately how long will it be before your location experiences a sudden temperature drop?

physics

Find the rotational kinetic energy and angular momentum about its axis of the earth due to its daily rotation. Let ME = 6 x 1024 kg, RE = 6.4 x 106 m and ùE = 1.157 x 10-5 rev/sec.

physics

Find the rotational kinetic energy and angular momentum about its axis of the earth due to its daily rotation. Let ME = 6 x 1024 kg, RE = 6.4 x 106 m and We = 1.157 x 10-5 rev/sec.

Astronomy/Physics

I cannot calculate the gravitational force between these two objects. I am confused. Jupiter (R=800 million km, M = 2 x 10 to the 27th power kg and a 100 kg person on earth. Please help!

Earth Science

Near shore, larger sand and gravel particles are moved along the ocean bottom by ____. a. deposition b. turbulence c. spits d. density currents

science

1. What was wrong or why do you think people rejected Wegner's idea of continental drift? 2. Explain why some partly molten lava rises toward Earth's surface.

Physical Science

The string of a certain yo-yo is 80 cm long and will break when the force on it is 10 N. What is the highest speed the 200 g yo-yo can have when it is being whirled in a circle? Ignore the gravitational pull of the earth on the yo-yo.

Physical Science

The string of a certain yo-yo is 80 cm long and will break when the force on it is 10 N. What is the highest speed the 200 g yo-yo can have when it is being whirled in a circle? Ignore the gravitational pull of the earth on the yo-yo.

Earth science

of the three "local winds" types discussed in the text book, which do you think could be most easily harnessed for the generation of electricity by a huge wind farm?

biology

Explain how life on earth is dependent on both polarity of covalent chemical bonds and hydrogen bonding. Reference water, proteins and nucleic acids in your answer.

english

Please show me this, on a A4 sheet paper paste a cutout of a picture of earth and write 8 adjectives in capital letter inside rectangular block( any coloue ink)

Physics

What would our seasons be like if the rotation of the Earth's was aligned with the plane of the ecliptic so that the north pole pointed directly at the Sun once per year.

math

The fastest car on earth a Thrust SSC would win every NASCAR race in America. If it takes 0.5 hours to travel 380 miles, what is its speed?

Earth Science

1.   What measurement best describes the results of a scientific experiment regarding distance?  A. 57 miles B. 500 kilograms C. 523 inches D. 51 kilometers      My answer is D. Am I correct?   

differencI also equation

An object of mass 100g is thrown vertically upward from a point 60cm upabove the earth's surface with an initial velocity of 150cm/sec

math

A40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form aplateform of dimension 28m by 22m.find the height of the platform.

Science

What does Asimov predict will happen to earth in billions of years? a. it will be burned up by the sun b. its population will increase*** c. it will shrink slightly in size d. it will change position in the galaxy Am I correct?

English

1. You must blow up buildings one street away from the fire. 2. You must blow up buildings one blodk away from the fire. ========== Does #1 mean #2? Does 'street' mean 'block' in the sentence?

chem

DrBob222, thank you for answering my question(s). Sorry for asking repeatedly, I am new to this "posting" stuff. I thought I was asking different persons. Let me rephrase my question. How do I determine which roman numeral to place between the cation and the anion of a metal-...

physics

Hydrogen atom is initially in the ground state. It is excited by a photon bombardment and it then undergoes a transition from n = 3 to n=2 state. a) What is the frequency of the bombarding photon? b) What are the energy, momentum and the wavelength of the emitted photon? c) ...

physics

A stunt driver wants to make his car jump over eight cars parked side by side below a horizontal ramp a)With what minimum speed must he drive off the horizontal ramp? The vertical height of the ramp is 1.5m above the cars, and the horizontal distance he must clear is 20m . ...

Literature

Write an essay on "Do You Agree with Capital Punishment? 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 ...

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