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

25,143 results, page 95

chemistry

What mass of glycerin (), a nonelectrolyte, must be dissolved in 200.0 g water to give a solution with a freezing point of –0.900°C?

Statistics

A cooperation must appoint a president, CEO, coo, CFO. There are 15 qualified candidates. How many ways can the officers be appointed?

calculus

find the location and values of any global extrema of F(x)= x^3-3x^2-9x on the interval [-2,4] (you must show your work by finding critical points

physics

How much work must an ideal refrigerator perform to make 1 kg of ice at -10C from 1 kg of water at 20C when 20C is also its exhaust temperature?

Chemistry

How many grams of KI must be added to a 250-ml volumetric flask to prepare a water solution that is 0.100 M in potassium iodide?

Physics 2

How many grams of steam at 100C must be mixed with 200g of water at 20C in order for the equilibrium temperature to be 50C?

Math

The 3rd and 7th terms of an A.P are -1 and 11 respectively. Fine the nth term and the numbers of which must be added to get a sum of 430

Preschool Question--Pleae Help!

I asked this question a few days ago- and several tutors said there is no one correct answer. There has to be one answer better,because I can only mark one answer. For many children,the development of their imagination affects the development of: A. empathy B. literacy C. ...

cjs

The current threat of terrorism has made many legislatures in Congress think about the United States combining all the police agencies into one national police organization. The centralization of power would stop the discombobulated nature of the 3 government levels of police ...

Literature

which of the following lines from song of becoming best supports the response selected above? A:"Facing sullen tanks with streams of stones. B: Dueling with branches, pretending to be great heroes in history. C: They grown to become trees, plunging deep roots into the earth...

SOCIAL STDIES HELP! 8th

Which is not necessary in order for a bill to become a law? (1 point) The governor must sign the bill. A majority vote is needed in the House. A majority vote is needed in the Senate. The same version of the bill must be passed.*** In order to be governor of Georgia, a person ...

physics

A 120 N child is in a swing that is attached to ropes 2.20 m long. Find the gravitational potential energy of the child-Earth system relative to the child's lowest position at the following times. (a) when the ropes are horizontal (b) when the ropes make a 29.0° angle with ...

Math

Atmospheric pressure changes as you rise above earth's surface. At an altitude of h kilometers, where 0<h<80, the pressure P is newtons per square centimeter is approximately modeled by the function P(h)=10.31e^(-0.116h). What is the approximate pressure at 50 kilometers...

math

the manager of a take out pizza parlor needs to hire pizza makers and cahiers for the evening shift. the total number of employees of both kinds can be at most 16, and the ratio of cashiers to pizza makers must be at least 3 to 5. Also, each pizza maker can answer 12 phone ...

US History

Fighting the Depression Against Drastic Measures "We are told by the opposition that we must have a change, that we must have a new deal. It is not the change...to which I object but the proposal to alter the whole foundations of our national life which have been built through...

physics - HELP ASAP!

A 3.60 kg ball is dropped from the roof of a building 184.8 m high. While the ball is falling to earth, a horizontal wind exerts a constant force of 12.1 N on the ball. (acceleration of gravity = 9.81 m/s^2) How far from the building does the ball hit the ground? What is the ...

Physics - Gravitational force

Find the gravitational force between earth and the sun. I am using the formula Fg = (G*m1*m2)/(r^2) where G = 6.67*10^-11 m1 = 6.0*10^24kg m2 = 2.0*10^30kg r = should i use the sun's radius or the earths (Rearth = 6.38*10^6; Rsun = 6.96*10^8) either way i use i am not gettin ...

Physics

A 45-m length of wire is stretched horizontally between two vertical posts. The wire carries a current of 67 A and experiences a magnetic force of 0.15 N. Find the magnitude of the earth's magnetic field at the location of the wire, assuming the field makes an angle of 51.5° ...

physics

a solar panel is 12% efficient at converting sunlight into electrical energy.on average the sunlight that strikes the earth's surface has an intensity of 250 w/m^2 which of the following is the best estimate for the area of the solar panel needed to provide 1.2Kw of energy to ...

English

Without the greenhouse effect, the Earth's average temperature would be around -18 or -19 degrees Celsius. ---------------------------------- How do you read -18 or -19? 1. minus eighteen or minus nineteen 2. negative eighteen or negative nineteen Are both Okay? Which one is ...

PHYSICS

Two planes fly from toronto to philadelphia. Plane a flies via pittsburgh whereas passenger on plane B have a direct flight. Pittsburgh is 350km due south of Toronto and 390km due west of Philadelphia. The airspeed of both planes is 400km/h and a steady wind is blowing from ...

physics

Can a person, in principle, travel from Earth to the galactic center (which is about 2.3e4 lightyears distant) in a normal lifetime? Explain, using either time-dilation or length contraction arguments. If they want to make the trip in 24 y what distance would the person ...

Biology

A researcher collects high-resolution photographs of the Earth taken from outer space at annual intervals for the last decade. This data would be most useful to analyze which of the following? A. Human movement during crises B. Migration patterns of large whales C. ...

Physics...help please!

A body of mass m moves in the +x direction, subject only to drag force: Fx= (-1/2)(CD*rhoair*S*vx^2) With drag coefficient CD, air density rho air, cross sectional area S, and velocity component vx. At time t=0 the body is at postion x=0 and has velocity of vx=v0 where v0 is ...

Physics...help please!

A body of mass m moves in the +x direction, subject only to drag force: Fx= (-1/2)(CD*rhoair*S*vx^2) With drag coefficient CD, air density rho air, cross sectional area S, and velocity component vx. At time t=0 the body is at postion x=0 and has velocity of vx=v0 where v0 is ...

Government Help Please

All of the following statements regarding the process of selecting a case for Supreme Court consideration are true EXCEPT 1) A case selected for argument usually involves interpretations of the U. S. Constitution or federal law. 2) At least seven Justices have to select the ...

chemistry ( chemistry lab)

-'Gasoline engine' what are the waste products form this engine ? what element must gasoline be composed of ? -'fuel cell'what are the waste products from this cell ? what is the fuel used in the fuel cell? MY ANSWERs : - C02 , h20 and heat energy are waste products from ...

economics

Thank you so much economyst but i do'nt understand the ans for part (b) The demand function for a well known economics textbook is: P = 100 - .005Q The publisher must pay $20 per book in printing and distribution costs and, in addition, it must pay the author a $20 royalty for...

programming

Please write a program to simulate a game called Battleship. First you need to place ships on an N by N board (1 <= N <= 1000). Every ship will occupy a 1 by k area, where k is an integer between 1 and N. The ships cannot overlap and they can only be placed vertically or...

chemistry

2mno4 - + 5h2o2 + 6h= 2mn 2+ + 5o2(gás) + 8h2o You must determine the percentage of hydrogen peroxide (H2O2) in a solution by permangan titration. In an acid solution, the permanganations will oxidize hydrogen peroxide to oxygen gas ......... You must determine the percentage...

4th grade English

It is also one of the oldest lakes on earth. oldest-adjective Hundreds of animals are found only in Lake Baikal or the nearby area. hundreds-adjective nearby-adjective

Physics

A man stands underneath a power line carrying a current of 150 A. If the power line is 15 m above the man, what is the magnetic flux density measured by the man (Neglect the Earth's magnetic field).

math (plz help)

Ms. Sue has not answered this question where all work must be shown. Plz, Ms. Sue do not answer this one again. Let someone else help me...plz. In a movie theater, Theater A has 30 seats in the first row. Each row has 4 more seats in it than the previous row has. 1) How many ...

Mrs. Sue , Reed! Someone!

the subject is Geologic time. I was wondering if someone could check my answers please 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 ...

Physics

A small aircraft has a flying speed of 200 km/h in still air. To make a trip from Saskatoon to Regina, a straight line distance on the map of 250 km, a pilot must first determine the wind velocity and then calculate what direction to fly (the 'heading') to compensate for the ...

Physics

You push an air-hockey puck along a surface with negligible friction while riding in a truck as it moves at a constant velocity in Earth's frame of reference. What do you observe? Why? I'm tempted to say that the puck moves forward because that's all I can think of, but I ...

HISTORY

how is the size of a legislative district determined A. by geographical boundaries B. by city limits C. by the apportioned population D. by county boundaries*** 2. the term bicameral legislature refers to two of what A. chambers of the General Assembly *** B. state senators in...

Spanish (Please help me)

This is my assignment: Imagine you are babysitting your little brother. Write a total of 5 Spanish sentences using tú commands telling your little brother what to do. Write 3 sentences using regular verbs. Write 2 sentences using irregular verbs. You can use the examples ...

Art

An Asian sculptor creates an image of the Buddha for the local temple. The artist’s primary responsibility is to A. self: as long as he does his best, that’s all that matters. B. Buddha: he must work hard to please this revered leader. C. future tourists: he must make sure...

physics-Gravitational Attraction(please help)

1. The centers of two 11.80 kg spheres are separated by 0.09 m. What is their gravitational attraction? 2. What is the ratio of this attraction to the weight of one of the spheres (at the surface of the Earth)? Please answer both Thank you

english

According to Franz Fanon in his book The Wretched of the Earth, A. colonization need not be violent. B. decolonization need not be violent. C. decolonization is always violent. D. colonization is an inevitable necessary evil.

history

According to Franz Fanon in his book The Wretched of the Earth, A. colonization need not be violent. B. decolonization need not be violent. C. decolonization is always violent. D. colonization is an inevitable necessary evil.

astro

The intensity of an object is related to the distance d to the observer by the equation (I1/I2) = (d2/d1)2. If the apparent magnitude of the Sun seen from Earth has a value of -26.74, what is the apparent magnitude of the Sun seen from Neptune (30AU from the Sun)?

Math2

The scale of a globe is 1/8 inch= 125 miles. How many inches is the circumference of that globe? Hint 1: Circumference means distance around. Hint 2: Use 25,000 miles for the circumference of the Earth.

History Check Please!

I am having troubles with these 4 questions on my homework. Can someone help? 1. It is the responsibility of all citizens to A. run for political office. B. attend naturlization ceremonies. C. pay taxes and serve on juries.** D. join special interest groups. 2. Which is not a ...

Earth

1. The great galaxy in Andromeda has an angular diameter along its long axis of about 5^0. Its distance is about 2.2 million light years. What is its linear diameter? angle*distance= arc distance. You need the angle in radians to do this.

Math

The distance to the nearest 100000 km from Earth to the moon is given as 400000 km.The average speed to the nearest 500 km/h of a rocket to the moon is given as 3500 km/h.Calculate the greatest and least time it could take the rocket to reach the moon.

Physics

Help me with this please A 6.0 m section of wire carries a current of 5.2 A from east to west in the earth's magnetic field of 1.0 × 10^-5 T at a location where the magnetic field points south. In which direction does the magnetic force act on the wire? north south up down

Physics

A 180 kg object is taken to a height of 350 km above the Earth's surface. The object's mass of height is 180 kg. What is the object's weight at this height?

EARTH SCIENCE

1. What measurement best describes the results of a scientific experiment regarding volume? A. 1425 mL B. 5 quarts C. 2 pints D. 125 gallons A? 2. How is the mass number calculated for an element? A. The product of neutrons and protons B. There is no calculation. C. The ...

E.L.A. PLEASE CHECK!

Which choice best describes the underlined word or words in each sentence? For several decades, satellites around the earth have broadcast signals and monitored weather. Underlined is: satellites A- complete subject B- simple subject C- compound subject D- none of the above I ...

science

Earth's energy sources include both nonrenewable and renewable resources. Name at least three sources of energy that could be used in your house. The describe the ideal energy source for generating most of your home's electricity, and explain why you chose that source. (only ...

physics

A car travels due east with a speed of 35.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 70.0° with the vertical. Find the velocity of the rain with respect to the ...

physics

A car travels due east with a speed of 35.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle of 70.0° with the vertical. Find the velocity of the rain with respect to the ...

Physics

Assume the Earth is a perfect sphere of radius 6,400 kilometers. Find the weight of a 75.0 kg person at the North pole. Find the weight of this same person at the equator. (You don't need to use Newton's Law of Gravitation but you do need to analyze the radial/centripetal force.)

physics

A ball is thrown straight downward from the surface of the moon. Is the maximum height it reaches less than, equal to, or greater than the maximum height reached by a ball thrown upwards on the earth with the same initial speed? Ignore air resistance in both cases

physics

A rock is dropped off of a bridge into the water below. If the initial velocity was zero, and the well is on Earth (g = 9.8 m/s2), and you see the splash 4.59 seconds after the rock was dropped, how high was the bridge above the water? Give your answer in meters, to the ...

chemistry

2Na3PO4 + 3CaCl2 ----> Ca3 (PO4)2 + 6NaCl how many moles of CaCl2 remain if .10 mol Na3PO4 and .40 mol CaCl2 are used? When amounts of both materials are listed one must worry about which is the limiting reagentalthough the problem seems to suggest that Na3PO4 is the ...

physics

On planet Earth, a pendulum has a length of L and a period of T .On planet Mars, the pendulum has a length of 4L and period of 5T.what is the acceleration due to gravity ?

Earth Science

How many hours of daylight occur at the following locations on the specified dates? March 22 ---------------- 40 degrees north 0 degrees 90 degrees south December 22 ---------------- 40 degrees north 0 degrees 90 degrees south

Grammar

Do i need to capitalize the word everlasting? ------> The everlasting God, the Lord, the Creator of the ends of the earth, fainteth not, neither is weary. WHY and Do i need to capitalize the word everlasting? Please help.

CHEMISTRY

The atmosphere contains about 6.8×1013 moles of ozone. If this amount of ozone gas is compressed into a thin layer around the globe (the radius of Earth is 6370 km) at STP (Standard Temperature (0°C) and Pressure (1.0 atm.)), how thick will the layer be in millimeter? One ...

business

Consider the following scenario: You work for a company that manufacturers skateboards. Until now your company has only sold their skateboards domestically, but now the CEO is interested in exporting the skateboards to Australia. The CEO asks you to design a Microsoft ...

Physics addition of velocities

A seagull flies at a velocity of 7.00 m/s straight into the wind. (a) If it takes the bird 17.0 min to travel 6.00 km relative to the earth, what is the velocity of the wind? (b) If the bird turns around and flies with the wind, how long will he take to return 6.00 km?

8th grade history

Can anyone help explain this? when the course of human events it becomes necessary for one people to dissolve the political bands which have connected them with another and to assume among the powers of earth the separte and equal stations to which the laws of nature and of ...

PHYSICS

Nobel laureate Richard Feynman (1918-1988) once said that if two persons stood at arm's length from each other and each person had 1% more electrons than protons, the force of repulsion between them would be enough to lift a "weight" equal to that of the entire Earth. Carry ...

Social Studies

!. how is the size of a legislative district determined A. by geographical boundaries B. by city limits *** C. by the apportioned population D. by county boundaries 2. the term bicameral legislature refers to two of what A. chambers of the General Assembly B. state senators in...

International business

How and why would a seller make a sale to a buyer that has no money the seller can use? Perhaps the buyer trades something of value to the seller. For instance the buyer might barter lumbering rights in a forest for heavy earth-moving equipment. what are the features/ ...

Science

Read an article, and use the article to jump-start your thinking about designing your very own space mission. Think about what you want to explore in the solar system (and why!) and how you might get there. Click on the link below to read the Science NetLinks article “...

Social Studies

I need to know about fashion and style during the Heian period. Also, please revise this narrative about a girl during the Heian period. ONly edit if you know what youre doing. this is my final so no fooling please!! thanks so much (due 2morrow) HELP!!! (PS THIS IS ONLY a part...

Calculus

Given f and g are differentiable functions and f(a)=-4, g(a)=c, g(c)=10, f(c)=15 f'(a)=8, g'(a)=b, g'(c)=5, f'(c)=6 If h(x)=f(g(x)). find h'(a)? i'm not really sure how to get the answer. g'(a)=b, f'(b)=? How do i go about doing this. My reasoning must be wrong. h'(x)= f'(g(x...

Physics

How much work must be done to bring three electrons from a great distance apart to 1.0 * 10^(-10)m from one another (at the corners of an equilateral triangle)?

calc

how big must n be so that the absolute value of the error in using the trapezoid rule is less than .00001? for the integral (square root of (1+x^4)) where a=0 and b=1

Biology

What conditions must be kept constant for a fair test for the amount of carbon dioxide against the rate of photosynthesis of pondweed

Science

4.Which characteristic property must two solids differ if they are to be separated merely by being dissolved at room temperature and filtered?

algebra

given any seven positive integers, show that at least two must exist whose sum or difference is divisible by 10.

writing

What must you do to convert the annotated bibliography to an APA-formatted reference page as part of the rough draft of your research paper?

12th grade Physics

how much tension must a rope withstand if it is used to accelerate a 1200-kg car vertically upward at .80 m/s^2?

physics

Is this true or a trick question? In order to get a piano to start moving, you must push against it with a larger force than it pushes on you?

chemistry

What volume of ethylene glycol (C2H6O2), a nonelectrolyte, must be added to 13.7 L of water to produce an antifreeze solution with a freezing point of -30.0¡ÆC?

MATH (2)

1) GLORIA BUYS $14,000 AND MUST PAY 8% INTEREST. HOW MUCH WILL SHE HAVE ALTOGETHER? 2) GRID 245% AS A SIMPLIFIED FRACTION.

comp220

What must you do to convert the annotated bibliography to an APA-formatted reference page as part of the rough draft of your research paper?

Finance

How much cash must be deposited in a savings account In Order To Accumulate 50,000 At End Of 7 Years With 12 % Interest Rate?

nutrition

a 1,400- to 1,750-word paper in APA format outlining your healthy eating plan. You must discuss the following:

Physics

How much work (in J) must be done to lift a stack of bricks, which has a mass of 600 kg, from the ground to a height of 15 m? Acceleration due to gravity is 10 m/s2

Physics

Calculate how far and apart two indentical charges of 1.0 C must be in order for the Coulomb force between them be less than 500 N

Language arts

Life is full of choices, so i must learn to make good ones. Is the verb in this phrase just " is" or are there more

alg

In a permutation a) the selections are independent b) some items will never be used c) the order matters d) there must be at least 3 things to choose from

English

To assure the Writing Process is complete, the author must A. revise B. project C. compile I would say it's A, right? Thanks for checking.

biochemistry

calculate the mass of sodium benzoate that must be added to 1 litre of 0.4M benzoic acid with Ka=6.4 multiplied by 0.00004 solution to a buffer at pH 4.5

Chemistry

Between which two orbits of the Bohr hydrogen atom must an electron fall to produce light of wavelength 434.2 ?

physics

Between which two orbits of the Bohr hydrogen atom must an electron fall to produce light of wavelength 434.2 ?

science

In defining the sizes of orbitals, why must we use an arbitrary value, such as 90 percent of the probability of finding an electron in that region?

physics

For my question about the carton's speed must I do each step you laid out or just the last one? I got the wrong answer. Thanks for your help.

biology

why must the release of energy during the cellular process in which ATP is made from glucose take place in small steps?

chemistry

how quickly must a 54.7 g tennis ball travel i order to have a de Broglie wavelength that is equal to a photon of green light?

Physics

How fast must a 138 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with A = 100. pm?

Chemistry

How fast must a 144 g baseball travel in order to have a de Broglie wavelength that is equal to that of an x-ray photon with = 100. pm?

physics

calculate the horizontal force that must be applied to produce an acceleration of 1 g for 1 kg. puck on a horizantal frictiom-free air table.

Science

What are three major stages that must occur in order for glucose to be converted to carbon dioxide and water in aerobic conditions?

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