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April 16, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

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Physics
The shuttle must perform the de-orbit burn to change its orbit so that the perigee, the point in the orbit closest to Earth, is inside of Earth's atmosphere. De-orbit maneuvers are done to lower the perigee of the orbit to 60 miles (or less). An altitude of 60 miles is ...
Thursday, December 26, 2013 at 3:23am

Physics
A proposed space station includes living quarters in a circular ring 46.5 m in diameter. At what angular speed should the ring rotate so the occupants feel that they have the same weight as they do on Earth?
Tuesday, December 24, 2013 at 12:55pm

help please English
If this be error and upon me proved/ I nevered writ, nor no man ever loved." What is the impact of these concluding lines from shakespeare's sonnet 116? 1. They underscore the fact that everyone makes mistakes 2. They underscore the fat that shakespeare is a writer 3....
Sunday, December 22, 2013 at 9:26am

help please English
If this be error and upon me proved/ I nevered writ, nor no man ever loved." What is the impact of these concluding lines from shakespeare's sonnet 116? 1. They underscore the fact that everyone makes mistakes 2. They underscore the fat that shakespeare is a writer 3....
Saturday, December 21, 2013 at 8:01pm

English
9. Read these line, from The Passionate Shepherd to his love. "The country swains shall dance and sing/For they delight each May morning.?If these delights thy mind may move,/Then live with me, and be my love." What sort of life is the shepherd offering the numph? 1....
Friday, December 20, 2013 at 2:53pm

Physics 11 Forces Unit
I'm not sure if my answers are correct. Your help will be greatly appreciated. Thanks in advanced! 1. two very large cruise ships each have a mass of 415000 tonnes. If they were docked side by side, 1.0m apart, their centres would be 60m apart. What is the force of ...
Thursday, December 19, 2013 at 2:44pm

3-D Coordinates Polar coordinates Precalculus Trig
The U.S.S. Lollipop is on assignment in the Atlantic Ocean. It travels from a longitude of 70 degrees west to 20 degrees west, along the latitude of 40 degrees north. How far does it travel? (Assume that the radius of the Earth is 6,400 km.) Erm I don't know how to solve ...
Wednesday, December 18, 2013 at 10:59am

science
Earth's atmosphere,oceans, and continents began to form during the first several hundred million years a) Precambrian time b) the Paleozoic era c) the Mesozoic era d) the Cenozoic era
Wednesday, December 18, 2013 at 8:34am

Marketing
I would think just the title -- Mother Earth News -- would be powerful enough to use to draw in potential green-product advertisers! How can the potential advertiser benefit "Mother Earth"?
Tuesday, December 17, 2013 at 7:17pm

Marketing
Create a pitch to a potential green-product advertiser stating the benefits of advertising in Mother Earth News.
Tuesday, December 17, 2013 at 6:31pm

Science
I should have explained how when CO2 and other gasses absorb heat they make the surface of earth warm up. Here is a pretty good article on that: http://en.wikipedia.org/wiki/Greenhouse_​effect
Tuesday, December 17, 2013 at 5:05pm

Science
Oh my, where should I start. I live in a fishing port so I am particularly sensitive to rise in ocean levels and changes in fish distribution due to water temperature changes. Cod fish are in trouble at the southern end of their range and southern stocks such as black sea bass...
Tuesday, December 17, 2013 at 4:42pm

Physics
Mutiple choice: A car travelling at 10 m/s accelerates at 3 m/s^2. Its new velocity is A.) 12 m/s B.) 22m/s C.) 17 m/s D.) Can not be determined. Which of the following is not acceleration? A.) rate of change of speed in a particular direction B.) rate of change of motion in a...
Tuesday, December 17, 2013 at 3:20pm

English
9. Read these line, from The Passionate Shepherd to his love. "The country swains shall dance and sing/For they delight each May morning.?If these delights thy mind may move,/Then live with me, and be my love." What sort of life is the shepherd offering the numph? 1....
Tuesday, December 17, 2013 at 10:51am

science plz help right now!!!!
check my answers please 1. carrying capacity is the maximum number of (blank)that an ecosystem can support A. different species B. individuals in a population C. habitats D. limiting factors (i picked) 2. In an island ecosystem a species of beetle feeds on the leaves of a ...
Monday, December 16, 2013 at 6:42pm

Science
One light year is about 9 trillion kilometers. Arcturus is a star that is 37 light years from Earth. If you are about 11 years old now, how old will you be when light that is leaving Arcturus today reached Earth? How far, in kilometers, will it have traveled? please explain ...
Monday, December 16, 2013 at 6:36pm

Intro to Marketing
My instructor wan me to Create a pitch to a potential green-product advertiser stating the benefits of advertising in Mother Earth News.
Monday, December 16, 2013 at 5:26pm

Introduction To Marketing
Create a pitch to a potential green-product advertiser stating the benefits of advertising in Mother Earth News.
Monday, December 16, 2013 at 5:05pm

Quick science question
Spring tides occur when the earth, sun, and moon line up. Therefore they happen at full moon and new moon. If they are the highest of the season as well as the month, the moon is probably close to earth.
Monday, December 16, 2013 at 4:20pm

Quick science question
In the newspaper one day, you read that the highest tides of the season are expected in the next month. What can you infer about the positions of the Sun, Earth, and the Moon? What phase of the Moon will probably be visible?
Monday, December 16, 2013 at 4:09pm

Help Science!!! :( need help
That earth is a inner planet. Thank you for your support.
Sunday, December 15, 2013 at 12:44pm

science
http://earth.rice.edu/mtpe/atmo/atmosphe​re/atmosphere_why.html
Sunday, December 15, 2013 at 12:15pm

science
what are some ways Earth is protected by its atmosphere?
Sunday, December 15, 2013 at 12:11pm

Help Science!!! :( need help
Google is wonderful!! http://www.google.com/search?q=is+earth+​inner+or+outer+planet&oq=is+earth+inner+​or+&aqs=chrome.1.69i57j0l3j69i64.7009j0j​7&sourceid=chrome&espv=210&es_sm=119&ie=​UTF-8
Sunday, December 15, 2013 at 8:44am

Help Science!!! :( need help
Is earth an inner planet or outer planet???
Sunday, December 15, 2013 at 8:36am

Science help, Ms.Sue
1. After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap in the geologic record? an earthquake or motion along a fault new deposits of sediment must build up on the eroded area folding of sedimentary rock layers a volcanic eruption...
Saturday, December 14, 2013 at 5:41pm

Science help,plz:)
Okay, these are my last questions of the day.... 1. After a rock layer is eroded, which additional event must occur to create an unconformity, or a gap in the geologic record? an earthquake or motion along a fault new deposits of sediment must build up on the eroded area ...
Saturday, December 14, 2013 at 2:53pm

science
Which of the following best supports the idea that the melting of glaciers in Antarctica is a global environmental threat? A. The melting of glaciers can cause sea levels on Earth to fall. B. The melting of glaciers can change ecosystems in Antarctica. C. The melting of ...
Friday, December 13, 2013 at 4:19pm

Science-bobpursley/Ms.Sue
1. A trilobite is considered an index fossil because this organism existed during a limited period in Earth's history. That means that any fossil located in a layer of rock beneath a layer containing trilobite fossils is ____________ than a trilobite. 2. According to this ...
Thursday, December 12, 2013 at 11:02am

Astronomy help
I have already solve the problems in many time, but still cannot get the correct answer, can someone kindly help me to solve the problem, please? 1. Suppose the Moon is at a (center-to-center) distance D from Earth. Find an exact expression for the magnitude of the tidal force...
Thursday, December 12, 2013 at 5:46am

science
I really need help with science and this is the questin reason for blank because earth is titled 23 1/2 from a line perpendicular to it's orbit,the legth of daylight varies and because of the angle at which the sun's energy strikes a given location through the year.
Wednesday, December 11, 2013 at 5:49pm

Check my Science questions?
1. Why is it rare for the soft parts of an organism to become a fossil? The soft parts take a long time to decay. The soft parts can be eaten by other animals. The soft parts cannot be buried in sediment. The soft parts form petrified fossils. 2. Which of the following terms ...
Wednesday, December 11, 2013 at 1:36pm

Essay on UNITED WE STAND, DIVIDED WE FALL
United We Stand It is very much true in the history of the independence struggle in India, when Indians stayed together and fought against the British and raised India’s tricolor flag on 1947 August 15 in Red fort of New Delhi. Nelson Mandela and those who were considered...
Wednesday, December 11, 2013 at 7:50am

Essay on UNITED WE STAND, DIVIDED WE FALL
United We Stand It is very much true in the history of the independence struggle in India, when Indians stayed together and fought against the British and raised India’s tricolor flag on 1947 August 15 in Red fort of New Delhi. Nelson Mandela and those who were considered...
Wednesday, December 11, 2013 at 7:46am

Essay on UNITED WE STAND, DIVIDED WE FALL
United We Stand It is very much true in the history of the independence struggle in India, when Indians stayed together and fought against the British and raised India’s tricolor flag on 1947 August 15 in Red fort of New Delhi. Nelson Mandela and those who were considered...
Wednesday, December 11, 2013 at 7:46am

Grammar-clauses
1. How comes it then that this her cold so great / Is not dissolved through my so hot desire, / But harder grows the more I her entreat? (“Sonnet 30") (1 point) (0 pts) apply warmth (1 pt) ask earnestly (0 pts) attempt to soften (0 pts) ignore 1 /1 point 2. That fire...
Wednesday, December 11, 2013 at 12:48am

physics
An airplane with a speed of 46.4 m/s is climbing upward at an angle of 44° counterclockwise from the positive x axis. When the plane's altitude is 700 m the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath ...
Tuesday, December 10, 2013 at 9:14pm

earth
How old the object containing the element is.
Tuesday, December 10, 2013 at 6:40pm

earth
3. What can scientists learn from the rate at which radioactive elements decay?
Tuesday, December 10, 2013 at 6:34pm

Science help,Anyone?
1. Why is it rare for the soft parts of an organism to become a fossil? The soft parts take a long time to decay. The soft parts can be eaten by other animals. The soft parts cannot be buried in sediment. The soft parts form petrified fossils. 2. Which of the following terms ...
Tuesday, December 10, 2013 at 4:52pm

Science help,please...
1. Why is it rare for the soft parts of an organism to become a fossil? The soft parts take a long time to decay. The soft parts can be eaten by other animals. The soft parts cannot be buried in sediment. The soft parts form petrified fossils. 2. Which of the following terms ...
Monday, December 9, 2013 at 8:22pm

science
which of the following will make it harder in the future to develop sustainable methods for humans using resources? A. there will be fewer renewable resources B.more humans will populate the earth C.biodiversity naturally reduces over time D.more humans will recycle materials
Monday, December 9, 2013 at 5:40pm

Astronomy
1. Consider an asteroid of radius 2 km and density 2,500 kg/m^3 impacting the Earth. When it collides with the surface its kinetic energy is, to a large extent, dumped into the environment, some as heat vaporizing rock and some as mechanical energy throwing rock to great ...
Monday, December 9, 2013 at 3:49pm

Astronomy
The volume of a ball is given in terms of its radius by V=(4*pi/3)*R^3. Use this to find the average density of Nursat, i.e. the mass per unit volume. Use Earth'€™s mass in kg from the Table of Constants to express your answer in kg/m3.
Monday, December 9, 2013 at 3:48pm

Astronomy
1. At opposition, Nursat(is observed to be in opposition every 374 days.) is observed to subtend an angular radius of 7.1523 arcseconds. Use this and the conversion factors in our Table of Constants to find the radius of Nursat in km. 2. Nursat has a moon, Sunaj, which is ...
Monday, December 9, 2013 at 3:46pm

Astronomy
A possible trajectory for sending a spacecraft to Mars is an elliptical orbit with Earth at its perihelion and Mars at its aphelion. The craft would be launched out of low-Earth orbit by a quick burst of rockets into solar orbit, and would then "coast'' until ...
Monday, December 9, 2013 at 3:42pm

science
answers are all wrong the right ones are these: A.there will be fewer renewable resources B.more humans will populate the earth C.biodiversity naturally reduces over time D.more humans will recycle materials
Monday, December 9, 2013 at 2:50pm

7th grade Social Studies Ms. Sue please!
1. organize information. 2. enough detail. 3. Earth's tilt and orbit 4. new landforms. 5. latitude. 6. polar. 7. birth rates and death rates. 8. They cannot find work. 9. subsistence farming. 10. city-state. 11. 1. organize information. 2. enough detail. 3. Earth's ...
Monday, December 9, 2013 at 11:20am

english
Read the paragraph below and complete the cause-and-effect chart. Erosion is a natural process. During the erosion process, soil and rocks are worn away by the elements. Most erosion results from a combination of several factors, including heat, cold, gases, water, wind, ...
Monday, December 9, 2013 at 5:03am

math
A satellite's escape velocity is 6.mi./sec, the radius of the earth is 3960 mi, and the earth's gravitational constant (g) is 32.2 ft./sec^2. How far is the satellite from the surface of the earth?
Sunday, December 8, 2013 at 11:18pm

math alegebra
A satellite's escape velocity is 6.mi./sec, the radius of the earth is 3960 mi, and the earth's gravitational constant (g) is 32.2 ft./sec^2. How far is the satellite from the surface of the earth?
Sunday, December 8, 2013 at 10:32pm

meteogology
Does the equator receive perpendicular sun rays to the Earth's surface most of the 365 day year.
Friday, December 6, 2013 at 6:47pm

Physics
The gravitational acceleration on the surface of Mercury is 0.38 times that of Earth. Its radius is also about 0.38 times that of the Earth. What is the ratio of the density of Mars to that of Earth?
Thursday, December 5, 2013 at 7:55pm

Astronomy
1. Imagine that the Earth¡¦s spin were to be reversed, so that the planet rotated about its axis from East to West, at the same rate at which it now rotates from West to East. If Earth¡¦s orbital motion about the Sun were unchanged, which of these ...
Thursday, December 5, 2013 at 1:41pm

Astronomy
Star Right Ascension Declination Aldebaran 4h 36m 16¢X 31' Miaplacidus 9h 13m -69¢X 42' Deneb 20h 41m 45¢X 20' Regulus 10h 08m 12¢X 18' Hadar 14h 04m -60¢X 24' 1.If Aldebaran is crossing your local meridian, how long would you need ...
Thursday, December 5, 2013 at 1:38pm

physics
A satellite of mass 225 kg is launched from a site on Earth's equator into an orbit at 200 km above the surface of Earth. (The mass of the Earth is 5.98 1024 kg, and the radius of the Earth is 6.38 103 km.) (a) Assuming a circular orbit, what is the orbital period of this ...
Wednesday, December 4, 2013 at 11:09pm

physics
Suppose a driver's car needs to travel 46.4 miles in 1.000 hour at a constant speed. If the tires of the car have a rolling radius of 28.4 cm, what will be the period of rotation of each tire? Suppose a moon of a planet in a distant solar system has an average orbital ...
Wednesday, December 4, 2013 at 9:53pm

earth
thank you bobpursley, and Anne so much for your help. you are the best
Wednesday, December 4, 2013 at 9:18pm

earth
Using conservation of energy, the following equation can be written for any satellite (or planet) "caught" in a gravitational field: (1/2)MVe^2-(GM1M2)/Re=-(GM1M2)/Rmax where Rmax is the maximum altitude of the satellite and Ve is its escape velocity. Solving for ...
Wednesday, December 4, 2013 at 8:36pm

earth
PElocation+KEescape=0 -GMe/(h+re)+1/2 v^2=0 but GMe/re= g and.... -g re/(h+re)=-1/2 v^2 solve for h check my thinking.
Wednesday, December 4, 2013 at 8:22pm

earth
A satellite's escape velocity is 6.mi./sec, the radius of the earth is 3960 mi, and the earth's gravitational constant (g) is 32.2 ft./sec^2. How far is the satellite from the surface of the earth?
Wednesday, December 4, 2013 at 8:12pm

Science help (just 4 questions)
1. Which of the following is an example of an environmental pressure? (1 point) the air pressure in the atmosphere a lake that is gradually running out of water a fight between two members of the same species breeding between two members of the same species 2. Which of the ...
Wednesday, December 4, 2013 at 1:22pm

Physics
A400 N child is swing that is attached tow ropes 2m long , find the gravitational potential energy of the child-earth system relative to the red line level when ropes make an angle with the vertical .
Wednesday, December 4, 2013 at 7:12am

Physics
A metal wire loop hangs near the earth's surface from an insulating string. The loop spins continuously (at constant angular velocity) so that its area vector points north, then west, then south, then east, etc. 4.A conducting slider (thick line) moves without friction ...
Wednesday, December 4, 2013 at 5:57am

physics
An obnoxious brat assigns his 0.0221-kilogram pet mouse Mickey the role of stunt mouse by stuffing him into a spring gun and shooting him up into the air at some angle. During the launch process the spring transfers 0.707 J of energy into the \'mouse Earth gravitational ...
Tuesday, December 3, 2013 at 11:32pm

physics
An obnoxious brat assigns his 0.0221-kilogram pet mouse Mickey the role of stunt mouse by stuffing him into a spring gun and shooting him up into the air at some angle. During the launch process the spring transfers 0.707 J of energy into the \'mouse Earth gravitational ...
Tuesday, December 3, 2013 at 9:02pm

Physics
How far from the center of the earth must a satellite be placed so that the acceleration due to gravity is half the value at the surface? (Hint: the diameter of the earth is 1.3x107 m.)
Tuesday, December 3, 2013 at 11:18am

business law
*The below is a scenario in which I have to make an IRAC for (not sure if you know what that is) but read the scenario and see if "Faye" is able to leave legally without ramifications. You must also list the legal rules that apply to this scenario..(for example, if ...
Monday, December 2, 2013 at 3:10pm

Physica Science
Describe the movement of the Earth based upon the perceived change in positions of the stars
Monday, December 2, 2013 at 12:40pm

physics
On Earth a baseball player can hit a ball 120 m by giving it an initial angle of 45° to the horizontal. Take the acceleration due to gravity as g=10 ms^-2 Suppose the batter repeats this exercise in a space 'habitat' that has the form of a circular cylinder of ...
Monday, December 2, 2013 at 3:01am

Physical Science
Due to forces within the Earth, parts of Oklahoma in the geologic past were alternately below or above sea level. Thick layers of sediments accumulated in shallow seas that covered large areas. The sediments were later buried and lithified (hard - ened to rock) into marine ...
Sunday, December 1, 2013 at 6:53pm

Science
Three light beams encounter a medium. One light ray is reflected, while the other two are absorbed. How can the medium be described? Transparent Translucent Opaque or Clear In satellite communication, does the satellite... Receive radio signals Prevent radio signals Send radio...
Saturday, November 30, 2013 at 2:46am

physics
Consider the earth following its nearly circular orbit (dashed curve) about the sun.(Figure 2) The earth has mass mearth=5.98×1024kg and the sun has mass msun=1.99×1030kg. They are separated, center to center, by r=93millionmiles=150millionkm.
Wednesday, November 27, 2013 at 11:59pm

poetry
Could you help me answer these questions using William Cullen Bryant's poem, "The Prairies?" Thank you so much! I've attached a link to the poem. The poem text is widely available online if you just google the title/author Here are the questions I am ...
Wednesday, November 27, 2013 at 11:54am

science
what physical components do the sun and earth have in common ? a) core and mantle b) core and atmosphere c) crust and atmosphere d) mantle and crust
Wednesday, November 27, 2013 at 9:28am

physics, magnetism
A long thin copper wire has a mass of 100 grams / meter. If it is arranged near the surface of the earth pointing north in a 0.5 Tesla magnetic field pointing west, what current (in amps) is needed to levitate the rod (against gravity)?
Tuesday, November 26, 2013 at 6:45am

Science HP
since the orbit of earth around the sun takes one year, locations after six months are a full diameter apart, the largest separation possible.
Tuesday, November 26, 2013 at 4:59am

Physical Science
What are the tallest and longest mountain chais on Earth? How were they formed?
Monday, November 25, 2013 at 1:45pm

Science-Ms.Sue
Suppose some natural disaster occurs and a species of finch is forced to relocate from its original island where it dined on cactus flowers to an adjacent island with many fewer cacti but an overabundance of orchids. What would be the immediate consequences to the species in ...
Sunday, November 24, 2013 at 10:17pm

Science
Study the image of the fossil shown below. How might a scientist use this fossil to learn more about the history of life on Earth? connexus dot com/content/media/917517-4162013-72829-P​M-1012149111.jpg to compare structures in the fossil with homologous structures in ...
Sunday, November 24, 2013 at 7:48pm

Science-Ms.Sue
Very few fossils of jellyfish or their close relatives have been found. This makes it hard to trace the evolutionary history of jellyfish using the fossil record. What explains this? A. Jellyfish fossils are buried deep under the ocean floor, not in land areas where scientists...
Sunday, November 24, 2013 at 4:58pm

Physics
A pulley of mass mp , radius R , and moment of inertia about its center of mass Ic , is attached to the edge of a table. An inextensible string of negligible mass is wrapped around the pulley and attached on one end to block 1 that hangs over the edge of the table. The other ...
Sunday, November 24, 2013 at 10:01am

Physics
You are asking how far up before g = .87 ge where ge is g at earth surface. gravitational force is inversely proportional to distance squared. we are at r radius, Re is earth radius. so (r/Re)^2 = 1/.87 = 1.1494 r/Re = 1.07 or r = 1.0721 Re then r-Re = height above earth =....
Sunday, November 24, 2013 at 5:41am

Physics
A man has a mass of 65kg on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 13% of his body weight?
Sunday, November 24, 2013 at 2:53am

physics
A spacecraft of mass is first brought into an orbit around the earth. The earth (together with the spacecraft) orbits the sun in a near circular orbit with radius ( is the mean distance between the earth and the sun; it is about 150 million km). (a) What is the speed (in m/s) ...
Friday, November 22, 2013 at 12:43pm

science
the earth moves in its orbit, so the direction facing away from the sun changes during the year. We only see stars in the night sky. So, for extra credit: why are any constellations visible all year long?
Friday, November 22, 2013 at 11:56am

Science
B. Vertically through the center of Earth and through each pole.
Thursday, November 21, 2013 at 10:00am

Science
Luis wanted to create a clay model of earth and the sun. To show how Earth rotates, Luis wants to use a toothpick to represent Earth's axis of rotation. Where should Luis place the toothpick? A. Horizontally through Earth in the direction Earth is traveling B. Vertically ...
Wednesday, November 20, 2013 at 8:27pm

mit
A spacecraft of mass m is first brought into an orbit around the earth. The earth (together with the spacecraft) orbits the sun in a near circular orbit with radius R (R is the mean distance between the earth and the sun; it is about 150 million km). (a) What is the speed v0 (...
Wednesday, November 20, 2013 at 7:40am

Physics
if this is on Earth, acceleration is -9.8m/s^2 hf=hi+vi*t-1/2 g t^2 or 8=4.8t solve for time t in air. vf=vi-9.8t solve for vf
Tuesday, November 19, 2013 at 5:35pm

Science (Physics)
on the Earth W= mg=30•10=300 N on the Moon W₁=mg₁=mg/6 = =W/6 =300/6 = 50 N mg=GmM/R² g=G M/R² => M=gR²/G the gravitational constant G =6.67•10⁻¹¹ N•m²/kg², Earth’s radius is R = 6.378•10⁶ ...
Tuesday, November 19, 2013 at 1:46pm

Check my answers 6 ?s- Physics
What is a free body diagram? (Points : 1) a drawing of an object in free fall a diagram showing all the forces acting on an object but not its surroundings <-- a diagram showing the shape of an object and the forces that act on it a diagram of an object that is free to ...
Tuesday, November 19, 2013 at 12:11pm

electromagnets
a proton flying to the east near the surface of the earth at 1000mls. what is the magnitude of the force the proton feels due to earths magnetic field
Tuesday, November 19, 2013 at 1:56am

Science (Physics)
Gravity on the surface of the moon is only 1 6 as strong as gravity on the Earth. What is the weight of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s 2 . Answer in units of N What is the weight on the moon? Answer in units of N What is the mass on the ...
Monday, November 18, 2013 at 6:53pm

Physics - pendulum
A pendulum that on Earth has period 0.52 s is taken to the surface of a large asteroid, where it is measured to have period 1.7 s. What is the value of the gravitational acceleration on the surface of that asteroid?
Monday, November 18, 2013 at 2:12pm

PHYSICS
A wheel in the shape of a uniform disk of radius R and mass mp is mounted on a frictionless horizontal axis. The wheel has moment of inertia about the center of mass Icm=(1/2)mpR2 . A massless cord is wrapped around the wheel and one end of the cord is attached to an object of...
Monday, November 18, 2013 at 4:05am

Science (Physics)
On the Earth h=v²/2g On the Moon H=v²/2g₁ H/h= v²2g/2g₁v²=g/g₁ H=h g/g₁=24.2•9.8/1.6= 148.225 m
Sunday, November 17, 2013 at 5:37pm

Math
There are about 7 billion people on Earth. Suppose that they all lined up and held hands, each person taking about 2 yards of space. a. How long a line would the people form? b. The circumference of the Earth is about 25,000 miles at the equator. How many times would the line ...
Sunday, November 17, 2013 at 3:39pm

PHYSICS HELP
A pulley of mass mp , radius R , and moment of inertia about its center of mass Ic , is attached to the edge of a table. An inextensible string of negligible mass is wrapped around the pulley and attached on one end to block 1 that hangs over the edge of the table. The other ...
Sunday, November 17, 2013 at 1:18pm

Science (Physics)
On the moon, the acceleration due to gravity is only 1.6 m/s/s. If someone on earth can throw a baseball 24.2 m high, how high could she throw it on the moon?
Saturday, November 16, 2013 at 10:36pm

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