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

25,009 results, page 91

### Physics

ok part (b) A 4.0 kg block is stacked on top of a 12.0 kg block, whcih is accelerating along a horizontal table at a = 5.2 s^-2 m. Let Mu k = Mu s = Mu. (a) What mininum coefficent of friction Mu between the two blocks will prevent the 4.0 kg block from sliding off? (b) If Mu ...

### computers

TMA1PHY111 ( 1.) A passenger in a moving car and a passerby standing at the road side see each other as moving in the opposite direction. Which of the following is not true?< (A) The passenger is in motion relative to the passer-by (B) The passer-by is stationery relative ...

### earth science

which term is best defined as a measure of the amount of space a subtance occupies? volume It looks like you have answered your own question. If it is three dimensional, it is volume. However, if it is two dimensional, it is area. I hope this helps a little more. Thanks for ...

### Science

Suppose we allowed each person 1000m^3 of living space in a large building, with ceiling height 3 m. To the nearest order of magnitude, how many 1000m high buildings would have to be built to house the entire population of 8.5 x 10^14 people on the energy-limited Earth, if ...

### 3rd grade English

I'm trying too see if my daughter is doing her homework correctly .... The question is use each word or phrase as the subject of a sentence .add a verb describing an action that takes place in the present . Make sure each verb agrees with its subject Her answer was - the earth...

### english grammar

I have learning about the communication process that a correct interpretation in the communication process is necessary for an effective way of communication between sender and receiver. Make mistakes in interpretation can cause misunderstanding between sender and receiver. I ...

### lang arts

1. What can you predict about the poem by previewing the title, subtitle, and first line of the poem “In Response to Executive Order 9066”? It will be a letter to the Japanese-American citizens in which they are told they must leave their homes. It will be a letter to the ...

### spanish

Part 4—Listening Comprehension Directions: Listen to this short story called “What ought a man to do on earth?”—¿Qué debe hacer sobre la tierra un hombre? You will hear the story two times. After listening to the story, answer these questions. 17. How many ministers ...

### science

Plants must have 5 things in order to grow. 1. sun 2. water 3. soil 4. air 5. ? nutrients Thank you.

### Algebra

last one of my problems :-) solve: square root of x-1=x-3 This is an impossibility. there must remain any mistake within the problem

### physics

Could someone tell me if this is right? The voltage across a 10-ohm resistor carrying 3 amps must be E=I*R == E=3*10= 30 volts

### physical science

if an engine must do 500 joules to pull a 10 kg load up to a height of 4 meters, what is the efficiency of the engines?

### Pre Cal

How Much must be invested now, at 3.75% interest, compounded monthly to have $37,500 in 22 years? thanks

### Physics

1. What constant acceleration, in SI units, must a car have to go from zero to 69.0 mph in 13.0s ? 2. What fraction of g is this? (the unit for this answer is % of g)

### spelling

brother is to mother like fly is to? 4 letters and must include scr spr str or thr

### Algebra

Given any positive integer, show that two must exist whose sum or difference si divisible by 10.

### CHEM

Evaporation is an A.endothermic B.exothermic process, because when a substance evaporates it must A. absorb B. release energy to(from) its surroundings.

### Chemistry

Consider 57.5 mL of a solution of weak acid HA (Ka = 1.00 10-6), which has a pH of 3.800. What volume of water must be added to make the pH = 6.000?

### Business comunication

If you must persuade your audience to take some action, aren't you being manipulative and unethical? Explain.

### business communications.

If you must persuade your audience to take some action, aren't you being manipulative and unethical? Explain.

### philosophy

Michael Jordan wore that brand, so those must be the best basketball shoes. What fallacy would this be.

### 5th grade

what is the complete subject , a person must have very good eyesight to work with beads.

### physics

An elevator weighing 2400 N ascends at a constant speed of 5.0 m/s. How much power must the motor supply to do this?

### English

What are the predicate adjectives in this sentence? The charmer must remain calm as the cobra flares its hood menacingly.

### Physics

To suck water up a straw to a maximum height of 98 mm, what minimum gauge pressure must be produced in the lungs?

### biology

What role, if any, do you think people must play in preserving those regions threatened by human encroachment

### math

In how many ways can 7 people be lined up to see a movie if Ben must be at the start of the line? is the answer 720?

### math

In how many ways can 7 people be lined up to see a movie if Ben must be at the start of the line? is the answer 720?

### Physics

How fast must a truck travel to stay beneath an airplane that is moving 139km/hr at an angle of 25° to the ground?

### chemistry

How many milliliters of glycerol, d=1.26 g/ml, must be added per kilogram of water to produce a solution with 4.55 mol% C3H8O3 ?

### math

A saleswoman is working on a 4% commission basis. If she wants to make $3,200 in one month, how much must she sell?

### chemistry

1.) What must be the molarity of an aqueous solution of trimethylamine (CH3)3N if it has a Ph of 11.04? Kb = 6.3*10^-5 if someone can show the mechanics of doing this, will be appreciated much.

### Physics

A centrifuge has a rotational inertia of 6.0 10-3 kg · m2. How much energy must be supplied to bring it from rest to 420 rad/s?

### physics

An elevator weighting 2500 N ascends at a constant speed of 8 m/s. How much power must the motor supply to do this?

### Physical Science

how much heat must be added to 300g of water to raise its temperature from 20 to 80 degrees celcius?

### chemistry

What weight of sodium nitrate (NaNO3) must be used to prepare 511mL of a 10.8Msolution of this salt in water?

### science

what mass of formic acid must be dissolved in 250 ml of deionized water to produce a solution of pH 1.83?[ka of HCOOH=1.77*10^-4, Mw=46]

### chemistry

How many grams of sucrose,C12H22O11 must be dissolved in 750.mL of water to prepare a 0.250 molal solution?

### geometry

M is the midpoint of line segment AB.Find the missing coordinate for each 10a. A:p-4 M:8 B:p+12 must use ruler postulat

### college

How fast (in rpm) must a centrifuge rotate if a particle 8.2 cm from the axis of rotation is to experience an acceleration of 200000 g 's?

### math

If you borrow $500.00 at 4.5% for a nine month period, what is the interest amount and how much must you pay back

### chemestry

How many mL of a 0.217 M aqueous solution of ammonium fluoride, NH4F, must be taken to obtain 3.63 grams of the salt?

### Chemistry

suggest why the acetic acid concentration of a food vinegar must be known for regulatory health and saftey reasons

### chemistry

how many grams of Na2CO3 must be dissolved into 155 g of water to create a solution with the molality of 8.20 mol/kg?

### chemisrty

what voule of 12M hydrochloric acid must be diluted with distilled water to prepare 5.0L of 0.10M HCl?

### Science

draw diagrams illistrating balanced forces. you must show and object at rest and one in motion.

### Physics

How fast (in rpm ) must a centrifuge rotate if a particle 8.00 from the axis of rotation is to experience an acceleration of 117000g's?

### Statistics

If the mean of a set of data is 20.00 and 12.20 has a z-score of -1.30, then the standard deviation must be: What formula would you use to determine this?

### chemistry

Assuming that the volumes are additive, what volume of water must be added to 35.0mL of 23.0 M HCl to make a solution which is 3.00 M?

### Chemistry

What must be the concentration of F- to just start precipitation of SrF2 from a solution which is 1.202*10-5M i Sr(NO3)2? Ksp = 2.900*10-9

### Chemistry

What must be the concentration of F- to just start precipitation of SrF2 from a solution which is 1.202*10-5M i Sr(NO3)2? Ksp = 2.900*10-9

### econ

What is the lowest value of economic profit that the firm must earn if it is to keep its resources in the current industry?

### chemistry

How many grams of HCl must be used to produce 10.0L of chlorine gas at STP? Reaction: 2HCl (g)--->H2 (g)+Cl2 (g)

### Chemistry II

Calculate how many milliliters of 0.100 M HCl must be added to 25.0 ml of a 0.200 M solution of NH3 to prepare a buffer that has a pH of 9.50? Kb = 1.76 x 10^-5

### chemistry

how many grams of naOH must be dissolved to a total volume of 800 mL, if the desired molarity is 0.200 molar?

### Physical Science

what forward force must the ground apply to the foot of a 60.0 kg person to result in an acceleration of 1.00m/s^2

### physics

An airplane reaches a velocity of 71m/s^2 when it takes off. What must its acceleration be if the runway is 1.0km long

### chemistry

why must scuba divers ascend to the surface at a controlled rate after a deep sea dive?

### law

To be eligible for the Marital Deduction, the property must pass "__________." A. eventually B. indirectly C. outright D. quickly is it D

### AP Chemistry

Consider 67.0 mL of a solution of weak acid HA (Ka = 1.00 10-6), which has a pH of 4.500. What volume of water must be added to make the pH = 5.000?

### physics

5. An object that has kinetic energy must have A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None of these.

### physics

5. An object that has kinetic energy must have A) momentum. B) acceleration. C) a force applied to it. D) All of these. E) None of these.

### Chemistry

A student must prepare 2.00 L of 0.100 M Na2CO3 (106 g/mol) Which is the besst procedure for preparing this solution ?

### Chemistry

A student must prepare 2.00 L of 0.100 M Na2CO3 (106 g/mol) Which is the best procedure for preparing this solution ?

### math

the cost of travelling by bus is Rs10 for the first km and RS 3 for every additional km. how much must be paid for a journey of 20 km?

### chemistry

determine the pressure that must be excreted on 200 grams of oxygen to contain it in a 2.oo l vessel at 30 degrees celcius

### physic

What is the electromagnetic flux coming from the surface of a 2000K blackbody? (You must show your work for full credit

### chemistry

what is the formula to determine the mass of propane that must be combusted in order to produce 188.23kJ of energy?

### Science

I have this last question left and I'm stuck!!! Explain how cell organelles are similar to a factory. Must be 1/2 a page.

### English

What are the nouns and verbs in the sentence. Life is full of choices, so I must learn to make good ones.

### Physics

A stone is thrown straight up. To reach a height of 6.49 m above its release point, what must its initial speed be in m/s?

### physics

A stone is thrown straight up. To reach a height of 6.74 m above its release point, what must its initial speed be in m/s

### General Chemistry I

Write the formation reactions. {You Must include the states of matter for each atom or compound} NaClO4(s)

### Statistics

To conduct a valid regression analysis, both x and y must be approximately normally distributed. True False

### Statistics

To conduct a valid regression analysis, both x and y must be approximately normally distributed. True False

### Calculus

A rectangular microprocessor chip is designed to have an area of 121mm^2.What must its dimensions be if its perimetar is to be a minimum?

### physics

how much heat enrgy must be taken in 24 gram of water to reduce the temperature of 7 degrres celcius

### science

how many milliliters of 5.5M H2so4 must you use to prepare 500ml of 0.2M sulfuric acid solution? Please hurry!!!!!!

### math

in order to be able to ride a roller coaster you must be 48 inches tall .which inequality represents this situation?

### english

What are the nouns and verbs in this sentence? Life is full of choices, so I must learn to make good ones.

### english

Identify the nouns and verbs; Life is full of choices, so I must learn to make good ones.

### chemisty

how many grams of sucrose must be dissolved in 1.5kg of water ot produce a solution which has a freezing point of -2.40 degrees C?

### Chemistry

How many grams of nitric acid (HNO3) must be dissolved in 740 mL of water to make a solution with a pOH = 8.3?

### Financial Accounting

Which account(s) must be analyzed to determine the proceeds from the sale of a building? How is this cash flow classified?

### algebra

solve x^4-8x^3+64x-105=0 given that 2-i is one solution. must be tired cause my steps are not calculating correctly

### A Curious Question

How much schoolwork must you complete to graduate high school in approximately two years?

### Health

Compare the stages of Maslow's hierarchy of needs. I know you told me that I must be more specific but I am struggling to answer this.

### algebra

Solve the system by graphing: In order to receive credit for this problem you must show all your work. y=x+6 y=-3x+6

### physics

Explain in terms of the conservation of momentum why the ratio of the masses of a bullet and a gun must be carefully considered

### Math 221

I need help trying to figure this out: y+x+4 and the parallel must past through this given point (-7, 1)

### geometry

How many different triangles can be formed having a perimeter of 7 units if each side must have integral length?

### maths

A triangular section of a design must have an area of 1.84m square. If the height has to be 1.6m, what’s the base length?

### Chemistry

How long (in minutes) must a 5.40 A current be passed through an aqueous solution of zinc nitrate to deposit 87.5 g Zn?

### Math

10. Estimate 30% of the student population. You must show all of your work and provide an explanation. *There are 850 students.

### Science Physics

How many Btu of heat must be added to 1200 lb of copper to raise its temperature from 100°F to 450°F

### chem

How many mL of a 0.123 M aqueous solution of aluminum bromide, AlBr3, must be taken to obtain 7.77 grams of the salt?

### Chemistry

How many grams of oxygen gas must react to give 2.80g of ZnO? 2Zn(s)+O2(g)→2ZnO(s)

### AP physics

An object undergoes a displacement x while a force F acts on it. If F does zero work, then the angle between F and x must be

### Physics

A block of mass 8.1 kg is pulled to the right by an applied force of 76.2 N. If the acceleration is 0.84 m/s^2, how much friction must be present?