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

24,970 results, page 99

statistics

find the number of units that must be produced to break even. R(x)=200x - x^2 C(x)= 70x +2200 0 < x < 100 (These < are supposed to b less than or equal to signs)

CHEM 120

What mass of ammonium nitrate must be added to 350 mL OF 0.150 M solution of ammonia to give a buffer having pH of 9.00? (Kb(NH3)= 1.8X10-5

science, Health

RATE of diffusion must be expressed as number of particles moved per unit time. Write this as a word. Can you please teach me this?

math

How much money must Andrea invest for 2 years in an account that earns an annual simple interest rate of 8% if she wants to earn $500 from the investment?

Science

In order to reproduce, flowering plants must do what? A. split into two cells B. release seeds C. regenerate D. mate I think the answer is b.

Physics Help

If we witness events taking place on the moon, where gravitation is weaker than on Earth, would we expect to see a gravitational red shift or a gravitational blue shift? and Explain please a)blue shift b)red shift c)no shift

Physics

You recently read that a new possibly habitable planet was discovered. The planet, Burt, receives 1700 W/m2 from it’s companion star. If planet Burt has a a radius of 6500 km and acts like a blackbody ( emissivity =1 ) and thus radiates same amount of energy it absorbs, what...

English - Caesar & Antigone

Can you check these questions? 1) Which is an example of verbal irony as spoken by Antigone? a)"You have yourself to consider, after all." b)"You must decide whether you will help me or not." c)". . . and if I must die, / I say that this crime is holy . . ." d)". . . if it ...

Earth Science

A scientific hypothesis can become a theory if? a- the entire scientific community accepts it b- the hypothesis is tested extensively and competing hypothesis are eliminated c- there are no other competing hypothesis d- the hypothesis can be tested at least once My answer is B

earth science

I need to draw a diagram showing delta, oxalate, tributary and meander. I also need to draw a diagram showing water table, zone of saturation, cone of depression, working well, dry well, aquitard, aquifer, spring, perched water

Chemistry

I did a back titration with an unknown carbonate and using the average % carbonate (by mass) which I found to be 27.40% and appropriate calculation decided where the unknown is an alkali metal carbonate or an alkaline earth metal carbonate. I have no idea how to tell the ...

physics

A baseball pitcher throws a baseball horizontally at a linear speed of 41.3 m/s. Before being caught, the baseball travels a horizontal distance of 15.4 m and rotates through an angle of 52.7 rad. The baseball has a radius of 3.74 cm and is rotating about an axis as it travels...

7th grade Science

How does the internal structures of earth's density compare to the lithosphere's density? It is a lot greater, a little greater, a lot smaller or a little smaller?

Writing I

Label each sentence below. Use S for simple, CD for compound, CX for complex, and CD-CX for compound-complex. 1. Do you know the theory of black holes? 2. Objects in space have gravitational pull, so smaller objects are attracted to larger object. 3. Throw a rock into the air...

Earth Science

Seismic waves move faster through which of the following media? a.) water b.) steel c.) oxygen d.) oil Please answer my study guide is due Monday and the teacher hasn't gone over this I looked through my notes and everything. It would really help if you answer...Please answer ...

Symbolic Logic

Even if you know only some of them please help! 1. Give a proof of the following: (∀F)( (P)( [ιxGx][Px] ⊃ F(P) ) ⊃ F(G)) (∃F)( (P)( F(P) ≡ [ιxGx][Px]) Therefore, E!(ιxGx) 2. Prove the following: [ιxMx][Thales believed that Bx...

data

Given the following business scenario, create a Crow’s Foot ERD using a specialization hierarchy if appropriate. Tiny Hospital keeps information on patients and hospital rooms. The system assigns each patient a patient ID number. In addition, the patient’s name and date of...

Chemistry

Which of the following is true about oxidation reactions? A. Oxidation reactions are the principal source of energy on Earth. B. All oxidation reactions are accompanied by reduction reactions. C. The burning of wood in a fireplace and the metabolization of food by your body ...

just a ?

Do you think that it is even possible that we could live in a sustainable way at this point? In other words,even if our population growth decreased and each member of society was willing to contribute to sustainable living and protecting the environment, could the earth still ...

PHYSICS

Indentify the direction of the netforce in each of the following situations. A marble moves in a circular path inside a paper plate at a constant speed. The moon orbits the earth. An air hockey puck moves smoothly across the air hockey table after being struck. A rocket is ...

PHYSICS

Indentify the direction of the netforce in each of the following situations. A marble moves in a circular path inside a paper plate at a constant speed. The moon orbits the earth. An air hockey puck moves smoothly across the air hockey table after being struck. A rocket is ...

physics

Why is your weight not one-quarter as much when you climb to the top of a twice as tall tree? A) Because, quite simply, of Newton's law of action and reaction.B) Because parts of the tree itself gravitationally attract you.C) But it is, in accord with the inverse-square law.D...

physics

A 3.00 kg ball is dropped from the roof of a building 176.4 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 12.0 N on it. a.)How far from the building does the ball hit the ground? b.)How long does it take to hit the ground? c.)What is ...

Physics

A particle with a charge of -4.5 x 10-5 C, a mass of 2.5 x 10-7 kg, and a velocity of 7.0 x 10-5 m/s [E] is traveling perpendicularly through an external magnetic field such that the force of gravity is balanced by the magnetic force. Determine the direction and magnitude of ...

geography

Match the region to its description. 1. climate _defined by agreements between nations creating free trade zones 2. cultural _defined by average precipitation and temperature 3. economic _defined by factors including language, religion, or customs 4. physical _defined by their...

Algebra

How many pivot columns must a 5x7 matrix have if its columns span R^5? Why?

english

Where can I go to find a format for a newpaper,I must produce a a paper in newspaper format.

Biology

Why must biologists be able to distinguish homologous traits from analogous traits?

math

What least number must be added to 1056 to get a number exactly divisible by 23?

math

what least number must be subtracted from 13601 to get a number exactly divisible by 87?

Chemistry

how much silver nitrate must be measured to yield 1.00g silver?

chemistry

how many grams of water must be added to 75.5 grams of Ca(NO3)2 to for a 0.500 m solution

math

how would i write this in an equation?if f is equal to or less than g than h must be equal to or pluss x

chemistry

How much water must be added if you want to make 1L of solution that is 6M, into a 3M solution

Physics

How much heat must be added to 60 g of ice at 0 C to melt the ice completely?

chemistry

How many grams of HCl must be added to make 1 liter of a 2.0 M HCl solution

Chemistry Help!

To what volume must 290.0 mL of 4.50 M Al(NO3)3 be diluted to produce 2.40 M Al(NO3)3? ____ mL?

math (geometry)

If p∨q is true, then what must be true about the truth values of p and q?

math

If two sets are subsets of each other, what other relationships must they have?

math

vina has the following grades in math 88,85,89,95 and 91.What must be her sixth grade if she wants to get an average of 90?

chemistry

How many grams of HCL must be added to make 1 liter of a 2.0 M HCl solution?

chemistry

How many grams of HCL must be added to make 1 liter of a 2.0 M HCl solution?

physics

An object has a charge of −2.4 ìC. How many electrons must be removed so that the charge becomes +2.8 ìC

Chemistry

What volumes of 0.47 M HF and 0.47 M NaF must be mixed to prepare 1.00 L of a solution buffered at pH = 3.50? HF NaF

Chemistry

In an experiment with a titration of Vitamin C with Iodine, why must the iodine dropper be standardized?

Math

Factor 5x^2 -6x-4 I must be having an off day or something; this can factor, right!?

Algebra 1 (Reiny)

How am I supposed to solve 2x^0y^-3 when x = 7 and y = -4? Also, what steps must I take to solve x^10/d^-3?

Algebra

What is a solution for-the inequality y>1.9? -9 -2 2 1.9 My answer is if it has to be greater then 1.9 the answer must be 2.0 from those 4 choices.

Probability

Must appoint 5 different members. There are 17 who are qualified. How many different ways can they be appointed?

british lit

how to mark the syllables him still must serve,him still obey

Math

What is the greatest prime you must consider to test whether 7356 is prime?

Chemistry

The number of protons in a cation must always be ________ the number of electrons.

analytical chemistry

what is the volume that must be added to dillute 20.0 ml of 0.1M Hcl to 0.02M Hcl

math

I need help with math 12 5/8+6 3/8+5 2/3= they must have coming denominator like 24 = The answer

Chemisty

What volume of 12.0 M HCl must be diluted in order to make 250.00 ml of 2.00 M HCl

natural science

we must combine sodium carbonate with which acid to get sodium sulphate?

science

earth science Which ancient device for measuring time is similar to decorative garden sundails used today a.the shadow stick of the ancient egyptians b.the water clock of the ancient Greeks c.the weight -driven mechanical clocks of the 14th century d.the pendulum clocks of the...

physcis

A 100.0 kg base runner begins his slide into second base when he is moving at a speed of 4.70 m/s. The coefficient of friction between his clothes and Earth is 0.550. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to...

The Lovely Bones

If anyone has read this novel could you please explain 2 things to me. 1) Is Ruth Connors able to see the dead? Like when she moves to NYC she writes about all the murdered women she finds. How does she go about doing that? Can see she Susie too? 2) How is Buckley able to see ...

Physics

A small airplane has a speech of 200km/h with respect to the air. There is strong wind blowing at 77km/h at 23 north of east with respect to the Earth . A) in which direction should the plane head in order to land at an airport due north of its present location?B) what would ...

PHYSICS

The magnetic field of the Earth at a certain location is directed vertically downward and has a magnitude of 54.0 µT. A proton is moving horizontally towards the west in this field with a speed of 6.00 ✕ 106 m/s. (a) What is the direction and magnitude of the magnetic ...

Earth Science - Please Check My Answer

Please help with the following: How does sleet differ from snow? A. It is not a form of precipitation. B. It is liquid and not ice. C. It starts as rain and freezes in the air. D. It starts as water vapor and changes to a solid. I know that answer is not D because I got it ...

physics

A bicyclist traveling with speed v=3.3 m/s on a flat road is making a turn with a radius r=8.6 m. The forces acting on the cyclist and cycle are the normal force (FN) and the friction force (Ffr) exerted by the road on the tires, and mg, the total weight of the cyclist and ...

Physics

Can a person, in principle, travel from Earth to the galactic center (which is about 2.30×104 lightyears distant) in a normal lifetime? Explain, using either time-dilation or length contraction arguments. If they want to make the trip in 26 y what distance would the person ...

physics

The physics of orbital radius and orbital period of a planet. If a small planet were discovered whose orbital period was twice that of Earth, how many times farther from the sun would this planet be?

physics

Suppose that three astronauts outside a spaceship decide to play catch. All the astronauts weigh the same on Earth and are equally strong. The first astronaut throws the second astronaut toward the third one and the game begins. Describe the motion of the astronauts as the ...

Geometry

If two angles are congruent, must their supplements be congruent? Thank you, anyone, in advance. c[=

stoichiometry

If 3.00 moles of water are produced, how many moles of oxygen must be consumed?

math

if the mean of a set of data is 23,must 23 be one of the data values?why?

Chemistry

What value of a measurement must be known if the accuracy of an experimental measurement is to be determined?

econmics

Individuals in a market who must take the market price as given are

Physics

A rod has a charge of -2.0 ìC. How many electrons must be removed so that the charge becomes +3.3 ìC

language

what is a homonym? the queston is? what is a homonym for missed? A)must B)mist C)most

chemistry

Calculate how many L of 21M HCL must be added to make 1L to .1M HCL.

algebra

64y^3-125 8x^3+125 Please help me I do not understand. Must done today.

algebra

(3-2square of 7(3+2square of 7 can someone help me please. This must turn in tonight

geometry

If the degree measures of the angles of a triangle are represented by x,y,x+y the triangle must be??

math

can the expression 2x and x+ 2 ever have the same value? if so, what must the value of x be?

Chemistry

To produce 3.00 L of a 1.9 M solution of NaOH, how many grams of NaOH must be dissolved?

microeconomics

Individuals in a market who must take the market price as given are?

Chemistry

to how many milliliters must 29.6 mL of 4.25 M HCL be diluted to make 0.654 M HCL?

chemistry

To what volume must 25.0mL of 18.0M H2SO4 be diluted to produce 1.50 M H2SO4?

chemistry

how many milliliters of 2.0 M kbr must be diluted to make 250 ml of 0.5 M Kbr?

Math

If the inequality | a | > | b | is true, then which of the following must be true? A. a = b B. a =/ b <----- is not equal sign C. a < b D. a > b E. a > 0

math

What does it mean for an equation to be balanced and why must you keep an equation in balance?

MATH

WHAT NUMBER MUST BE ADDED TO EACH TERM OF THE RATIO 11:15 SO THAT IT BECOMES THE RATIO 7:8

Algebra

For which value of x must the expression 97x − − − √ 97x be further simplified?

math question

Bob Rodriquez, the Albany, NY sales representative for Advanced Drafting Software, Inc., must attend the regional sales meeting in New York City. Unfortunately, his car is in the shop so he must make other travel arrangements to reach his destinationOne option is to take a ...

Physics

So this is the problem: A comet is in an elliptical orbit around our Sun. At its point of closest approach, it is moving at 6.3x10^4 m/s and is 4.2x10^10m away from the sun. When it is at the farthest distance, 7.5x10^12m away, how fast is it going? This is what I did K1+U1=K2...

Physics

Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms longer than the day at the start of the century. In 72 centuries, what is the total (in hours) of the daily increases in time (that is, the sum of the ...

physics

Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms longer than the day at the start of the century. In 58 centuries, what is the total (in hours) of the daily increases in time (that is, the sum of the ...

PHYSICS

Because Earth's rotation is gradually slowing, the length of each day increases: The day at the end of 1.0 century is 1.0 ms longer than the day at the start of the century. In 93 centuries, what is the total (in hours) of the daily increases in time (that is, the sum of the ...

science

how many helium atoms must undergo fusion at 100 million K in the helium flash?

Help

I must be doing something incorrectly. When I submit my question, all of it does not appear. Again, here is my question:

book discussions

In general, what are some "must ask" questions when holding a discussion about a book?

Chemistry

A gas initially at 20 degrees C it must be changed to (blank) degrees C to triple the pressure.

help me plz

if a and b are both odd integers, which expression must always equal an odd integer? 1 a+b 2 a*b 3 a-b 4 a/b

Science

Infer why the output force exerted by a rake must be less than the input force?

Chem

find pH of 0.050 M HCLO4 plus 0.050 M HBr> You must consider activities>

social studies

why must all of the people in chinav farm all the available land?

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