Why must the centre of the satellite orbit coincide with the centre of the Earth?
25,452 results, page 96

Easy 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? 
thermodynamics
an automobile having a mass of 1.250 kg is traveling at 40m/s. what is its energy in kJ? how much work must be done to bring it to a stop? 
science
a pipe that carries 10 gpm of liquid at 50 psi with at least 0.5 sq in area must fit through a hole that's 1.25 in in diameter. 
Chemistry
How much ethylene glycol (C2H6O2, the major component of antifreeze) must be added to 1 L of water to keep it from freezing at 20 oC? Kf = 1.86 oC/m. 
Chemistry
What precautions must be taken when you introduce a mixture of compounds to be separated onto a liquid chromatography adsorbent column? 
Chemistry
What precautions must be taken when you introduce a mixture of compounds to be separated onto a liquid chromatography adsorbent column? 
Anatomy
What type of organism must use the cell's energy and parts to multiply? A. Protozoa B. Fungi C. Bacteria D. Virus 
pre calculus
In how many ways can a family of six be seated at a round table if the mother and father must sit together? 
Math
write an inequality representing the depth d of the water that must be greaeter than 80degrees farenheit in order for a hurricane to form 
Math
If a wheel turns 9 revolutions per minute and its circumference is 3.77 what speed must a mouse run to stay on top 
Math
A wheel turns 9times per minute its diameter is1.2 at what speed must I run to stay on top 
chemistry
What mass of ammonium chloride must be added to a 0.500 L solution of 0.250 M ammonia to make a buffer with a pH of 9.26? Kb (NH3) = 1.8 × 10–5? 
chemistry help
What mass of ammonium chloride must be added to a 0.500 L solution of 0.250 M ammonia to make a buffer with a pH of 9.26? Kb (NH3) = 1.8 × 10–5? 
Ap European
In what respect must each of the following share in the war guilt? Austria,Serbia,Russia,France,Britain,Germany 
chemistry
what part of the meniscus must be read to accurately record the volume of a liquid in a graduated cylinder??? the lowest of the bubble? 
physics help
how much work must be done to raise a 5kg block of steel from the ground to a height of 2m (in Joules) in the absence of friction? 
math
If a line whose x and y intercepts are equal does not pass through the origin, then its slope must be A. 0 B. 1 C. 1 D. undefined I'm thinking it's 0, I don't know though. 
math
If a line whose x and y intercepts are equal does not pass through the origin, then its slope must be A. 0 B. 1 C. 1 D. undefined I'm thinking it's 0, I don't know though. 
mpole high school
Businesses processes community must engage whenever there is an issue before and during the protest 
physics
what minimum initial velocity must aprojectile have to reach atarget at a distance of 25m away? (g: 10m/s) 
electron theory and ohms law
what voltage must be applied to a 6.4ohm lamp filament to develop 20 amperes of current? 
Math Help
2x^43x^27x+1=0 Estimate what the real solution will be using Newton's method. Answers must be 4 decimal places. Let the first guess be x=1.75 
math help
2x^43x^27x+1=0 Estimate what the real solution will be using Newton's method. Answers must be 4 decimal places. Let the first guess be x=1.75 
Social studies
Which type of commitee must be formed if the House and Senate pass different versions of the same bill? 
Algebra
your are building a soccer field. the length has to be 30 m longer than the width, and the total perimeter must be between 320i m and 360 m. 
chemistry
For CaCrO4, Ksp= 7.1x 10^4. How many grams of Na2CrO4 must be added to 200 mL of .250 M Ca(NO3)2 to just initiate precipitation? 
Chemistry
Calculate the total amount of heat that must be added to convert 15.7g of ice at its melting point to steam at 100.0°C 
chemistry
to what temperature must a given mass of nitrogen at zero degree be heated so that both it volume and pressure will be doubled 
Calculus
Design an Advanced U substitution problem whose answer must be exactly 6 and can be solved without using calculator? 
math
Joan is going on a bike trip. She plans to ride 9 miles in 45 minutes. At what rate mi/min must she travel? 
Chemistry
How many grams of hydrogen peroxide (H2O2) must be added to 1,500 ml of water to produce a concentration of 1.33 m (molal solution)? 
Math
In a coordinate plane points (2,4) and (3, 1) are on a line.Which of the following must be true? A.)The two are intersecting B.)They are all above the x axis 
MATH
How many license plates are possible consisting of 4 letters followed by 2 digits, if the first letter must be a C? Repetition is allowed. 
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^33x^29x 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 10C from 1 kg of water at 20C when 20C is also its exhaust temperature? 
Chemistry
How many grams of KI must be added to a 250ml 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 
chemistry
To what temperature must a given mass of oxygen at 0degree celcius be heated so that both its volume and pressure will be doubted? 
chemistry
To what a temperature must be given mass of oxygen at 0degree celcius be heated so that both its volume and pressure will be doubted? 
math
it cost 660 to put on the school play. how many tickets must be sold at 6 piece in order to make a profit? 
Algebra and Geometry
Can someone xplain what the golden ratio is and how we know that it MUST be irrational. What does this tell us about our Penrose tilings? 
Preschool QuestionPleae 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. ... 
Chemistry (Gas)
A cylinder is filled with 120L of air at 101 kPa and 20*C. How long could the cylinder be used "just underwater" on earth assuming 2L is used every 5 seconds. I don't understand what the pressure and temperature would be "just underwater." Is it assumed that it is SATP? 
Science
Explain the law of motion needed to solve this problem and then solve it. On Planet Zorg, a 30 kg barbell can be lifted by only exerting a force of 180 N. What is the acceleration of gravity on Planet Zorg? Predict how the motion of this object would change if on Earth. 
science
Given that Antarctica is roughly semicircular with a radius of 2000 km and has an average ice thickness of 3000 m. a) How many km3 of ice does Antarctica contain? b) Assuming all the ice melts, how much will this raise sea level (ignoring that the Earth has curvature and ... 
environmental science
A sustainable society a. manages its economy and population size without doing irreparable environmental harm. b. satisfies the needs of its people without depleting Earth capital. c. protects the prospects of future generations of humans and other species. d. all of these ... 
science
he Bowen ratio describes how available heat at the Earth's surface is partitioned between latent heating (changes in phase of water) and sensible heating (conduction and convection). An increase in the Bowen ratio of agricultural land is the consequence of a(n) [(increased) or... 
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 ... 
earth science
if the base of a clound is located at an altitude of 2 kilometers and the top of the clound is located at an altitude of 8 kilometrs, is the clound located in the: troposhere statosphere or mesosphere 
physics
A 125 object is taken to a height of 210 above the Earth's surface. Part A What is the object's mass at this height? Part B What is the object's weight at this height? 
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 ... 
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... 
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
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...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 ... 
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 childEarth 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 ... 
EAPS
Consider what happens to a solar beam traveling through the atmosphere on some particular day. Within the atmosphere, 15% of the radiation is absorbed and 20% is scattered or reflected to space mostly by clouds. What percent of the solar radiation incident at the top of the ... 
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 ... 
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... 
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... 
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 45m 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 ... 
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 ... 
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 timedilation or length contraction arguments. If they want to make the trip in 24 y what distance would the person ... 
Biology
A researcher collects highresolution 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. ... 
Earth's Dynamic Atmosphere
Which one of the following statements is true about the equinoxes? A. They occur in June and December. B. Days and nights are equal in length everywhere. C. The length of daylight at the Arctic and Antarctic Circles is 24 hours. D. The Sun's vertical rays are striking either ... 
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 ... 
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... 
4th grade English
It is also one of the oldest lakes on earth. oldestadjective Hundreds of animals are found only in Lake Baikal or the nearby area. hundredsadjective nearbyadjective 
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). 
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 ... 
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
You push an airhockey 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 ... 
physicsGravitational 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. 
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 ... 
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 ...