Thursday
April 24, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

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Physics Please check my answers
It's possible for a body to have both rotational and translational motion at the same time. True. << False. 2. The moment of inertia of an object would be different on the surface of the earth than on the surface of the moon. True. << False. 3. The moment of ...
Monday, February 3, 2014 at 1:01pm

EARTH SCIENCE
When the water level of a stream or river exceeds its natural banks, it has reached its
Monday, February 3, 2014 at 9:19am

Physics
A red ball is thrown down with an initial speed of 1.2 m/s from a height of 25 meters above the ground. Then, 0.6 seconds after the red ball is thrown, a blue ball is thrown upward with an initial speed of 22.9 m/s, from a height of 0.8 meters above the ground. The force of ...
Sunday, February 2, 2014 at 6:25pm

Physics
A blue ball is thrown upward with an initial speed of 19.6 m/s, from a height of 0.5 meters above the ground. 2.4 seconds after the blue ball is thrown, a red ball is thrown down with an initial speed of 7.9 m/s from a height of 22.1 meters above the ground. The force of ...
Sunday, February 2, 2014 at 4:35pm

physics
ind the force of gravity between a newborn baby (mass = 2.9kg ) and the planet Mars (mass = 6.4×10^23kg), when Mars is at its closest to Earth (distance = 5.6×10^10m).
Sunday, February 2, 2014 at 3:04pm

physics
Find the force of gravity between a newborn baby (mass = 2.9kg ) and the planet Mars (mass = 6.4×1023kg), when Mars is at its closest to Earth (distance = 5.6×1010m).
Sunday, February 2, 2014 at 3:01pm

physics
What is the ratio of the gravitational force on you when you are 5800 km above the Earth's surface versus when you are standing on the surface? (The Earth's radius is about 6400 km.)
Saturday, February 1, 2014 at 6:02pm

Science
1. _______ magma causes powerful and explosive volcanic eruptions. A. Andesitic B. Rhyolitic C. Basaltic D. Composite B? 2. A common characteristic of mountains formed by two colliding continents is marine _______ rock. A. sedimentary B. metamorphic C. limestone D. igneous A...
Saturday, February 1, 2014 at 3:54pm

SCIENCE
1. _______ magma causes powerful and explosive volcanic eruptions. A. Andesitic B. Rhyolitic C. Basaltic D. Composite A? 2. All the processes that form mountain ranges are known as A. arch vibrations. B. compressive forces. C. orogeny. D. island arcing. C? 3. _______ describes...
Saturday, February 1, 2014 at 3:39pm

Science
1. _______ magma causes powerful and explosive volcanic eruptions. A. Andesitic B. Rhyolitic C. Basaltic D. Composite A? 2. All the processes that form mountain ranges are known as A. arch vibrations. B. compressive forces. C. orogeny. D. island arcing. C? 3. _______ describes...
Saturday, February 1, 2014 at 2:20pm

science
The Earth is a satellite of the sun? If not can you tell me what it is?
Thursday, January 30, 2014 at 11:19pm

math
1.The land on Earth’s surface is represented by the seven continents. Europe has 77% of the dry land while Africa has 20%. North America has 4/25 and Antarctica has 1/10 of the dry land. What fractional amount of the dry land is contained within the three remaining ...
Thursday, January 30, 2014 at 3:50pm

Chemistry
At noon on a clear day, sunlight reaches the earth\'s surface at Madison, Wisconsin, with an average power of approximately 1.00 kJ·s–1·m–2. If the sunlight consists of photons with an average wavelength of 510.0 nm, how many photons strike a 1.30 ...
Thursday, January 30, 2014 at 10:40am

science
Granite is an igneous rock that forms from magma cooled below Earth's surface.Why would granite have larger crystals than igneous rocks formed from lava cooled above Earth's surface?
Wednesday, January 29, 2014 at 8:41pm

Science
1. The combination of sulfur dioxide, nitrogen oxide, and atmospheric moisture creates A. drinking water. B. smog. C. pesticides. D. acid rain. D? 2. Another name for unicellular organisms that dominated Earth up to the Precambrian time is A. eukaryotes. B. cyanobacteria. C. ...
Wednesday, January 29, 2014 at 7:23pm

Physics
Calculate the percentage of Earth’s gravitational force on the ISS astronauts while orbiting at an altitude of 248 miles above Earth’s surface. To do this, compare the gravitational force on an orbiting astronaut to the force on the astronaut here at Earth’s ...
Tuesday, January 28, 2014 at 11:18pm

earth (or Biology?)
You collect some pond water and filter out the different organisms into separate jars. You add no food to the water, but one kind of organism is still alive long after the others have died. That species is best described as being _________.
Tuesday, January 28, 2014 at 11:02pm

Writing Evaluation (Writeacher)
Should I revise anything? In my opinion, the use of “scary things” as entertainment is redundant. I mean, honestly, what on earth is so enjoyable about fear? Fear is what haunts us and frightened us even as young children. Yes, we are taught to face it, to not fear ...
Tuesday, January 28, 2014 at 7:25pm

physics
Calculate the percentage of Earth’s gravitational force on the ISS astronauts while orbiting at an altitude of 248 miles above Earth’s surface.
Tuesday, January 28, 2014 at 4:56pm

EARTH SCIENCE- SO STUCK
How far from an earthquake epicenter is a city where the difference between the P-wave and the S-wave arrival times is 5 minutes and 00 seconds?
Tuesday, January 28, 2014 at 1:41pm

earth
What causes sedimentation in the ocean?
Tuesday, January 28, 2014 at 10:01am

physics
a projectile is ejected from a 25 m high tower with a velocity of 40 m/s at an angle of 30 degrees to the horizontal first on Earth and then on Mars. What is the ratio of the time taken to hit the ground on Mars compared to Earth? (Assume gravity on mars = .38gEarth) The ...
Monday, January 27, 2014 at 6:49pm

Physic
How far apart should two protons be if the electrical force of repulsion is equal to the weight (attraction to the Earth) of one of the protons?
Monday, January 27, 2014 at 9:58am

physis
Search: 2. Explain how radioactive decay has always warmed the Earth from the inside, and nuclear fusion has always warmed Earth from the outside.
Sunday, January 26, 2014 at 10:50pm

Physic II
How far apart should two protons be if the electrical force of repulsion is equal to the weight (attraction to the Earth) of one of the protons?
Sunday, January 26, 2014 at 12:13pm

Physic II
How far apart should two protons be if the electrical force of repulsion is equal to the weight (attraction to the Earth) of one of the protons? Fiqure is triangle with equal sides 2.5 m and base is 0.5 m
Sunday, January 26, 2014 at 12:09pm

EARTH SCIENCE
Cumulus and stratus clouds belong to which cloud group? A. Puffy clouds B. High clouds C. Middle clouds D. Low clouds Is it A? What is the basic cause of ocean tides? A. Gravitational force of volcanic activity B. Gravitational attraction between the Moon and the entire solar...
Saturday, January 25, 2014 at 11:12am

physics
1. The acceleration due to gravity calculated this way works well for objects near the Earth’s surface. How would you have to change the above equation if the object was 100,000 meters above the ground? (Note: this question refers to Newton’s equation for the force ...
Friday, January 24, 2014 at 2:54pm

Science
Can someone please check my answers and if they are wrong can you help me fix them? Thank so much!! 1. Which of the following determines the strength of the force of gravity between two objects? Check all that apply. (2 points) the speeds of the objects the masses of the ...
Friday, January 24, 2014 at 1:08pm

Chemistry 1
Imagine that a hypothetical life form is discovered on our moon and transported to Earth. On a hot day, this life form begins to sweat, and it is determined that the heat of vaporization of its sweat is 215 cal/g. The scientist observing the extraterrestrial life form also ...
Friday, January 24, 2014 at 1:06pm

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.
Friday, January 24, 2014 at 12:28pm

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.
Friday, January 24, 2014 at 12:50am

Science??!!! :/
I don't get any of this, plz plz, explain these to me!! 1.why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time ...
Thursday, January 23, 2014 at 10:38pm

physics
A tennis ball has a mass of 0.057 kg. A professional tennis player hits the ball hard enough to give it a speed of 52 m/s (about 117 miles per hour.) The ball moves toward the left, hits a wall and bounces straight back to the right with almost the same speed (52 m/s). As ...
Thursday, January 23, 2014 at 4:55pm

EARTH SCIENCE
1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon D? 2. A stream channel is formed when water A. carves a very deep and wide channel into rock. B. carries minerals into the ocean. C. creates a depression, which forms a lake. D...
Thursday, January 23, 2014 at 12:31pm

8th CCA Science
1. Under which of the following conditions would a fossil most likely form? A. A living thing dies and sediment is very slowly deposited on top of its body. B. A living thing dies and sediment quickly covers its body.**** C. A living thing dies and its skeleton is left exposed...
Wednesday, January 22, 2014 at 7:01pm

science help plzzz
Multiple Choice 1. Which of Earth's spheres contains mountains, valleys, and other landscapes? (1 point) atmosphere biosphere geosphere hydrosphere 2. Which of the following are examples of destructive forces? (1 point) ice wind both ice and wind neither ice nor wind 3. ...
Wednesday, January 22, 2014 at 6:44pm

English
Write this in your own words. what is Pollution? Pollution is the introduction of contaminants into the natural environment that cause adverse change.[1] Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of ...
Wednesday, January 22, 2014 at 3:00pm

help-3 questions
5. Which of the following is an important criterion for evaluating the effectiveness of a graphic organizer? how colorful it is how well it conveys information how many pages it is how many words it contains 6. How was information conveyed in the Google Earth tour about ...
Wednesday, January 22, 2014 at 11:50am

social studies
I need to answer the questions on my study guide, it is my homework but I forgot my book,I need to read chapter 3 it's about our earth,s renewable and non renewable resources.where else I find out about it
Tuesday, January 21, 2014 at 8:38pm

science
What is the acceleration of a 7kg rocjet if a force of 68.6 kg m/s/s (N) is used to move it away from the earth
Tuesday, January 21, 2014 at 7:53pm

Physics
A 33.4 kg child, with a 3.05 kg backpack on his back, first stands on a sidewalk and then jumps up into the air. Find the force (positive up/negative down) on the sidewalk from the child when the child is (a) standing still and (b) in the air. Now find the net force (positive ...
Tuesday, January 21, 2014 at 2:55pm

Science
Can someone please please help me? I don't have a text book, i have a online book and it isn't working. Can someone please be nice and help me? Science isn't my subject! 1. Why is Earth’s temperature just right for life? (1 point) Earth’s core is hot ...
Tuesday, January 21, 2014 at 12:12pm

someones GOTTA help me with this science...!!!
1. Which of the following describes the correct sequence of events during the water cycle? (1 point)precipitation ¨ condensation ¨ evaporation ¨ runoff condensation ¨ precipitation ¨ runoff ¨ evaporation runoff ...
Monday, January 20, 2014 at 9:25pm

Physics
Suppose that a binary star system consists of two stars of equal mass. They are observed to be separated by 380 million kilometers and take 9.0 Earth years to orbit about a point midway between them. What is the mass of each? ------------------------------- I've worked ...
Sunday, January 19, 2014 at 7:35pm

Science
1. Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? (1 point) a solar eclipse* a lunar eclipse a total lunar eclipse a penumbra 2. Which of the following statements about a lunar eclipse is true? (1 point) A lunar eclipse can...
Sunday, January 19, 2014 at 6:30pm

Science
1. Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? (1 point) a solar eclipse* a lunar eclipse a total lunar eclipse a penumbra 2. Which of the following statements about a lunar eclipse is true? (1 point) A lunar eclipse can...
Sunday, January 19, 2014 at 4:58pm

physics- multiple choice
1. A transport truck pulls on a trailer with a force of 600N [E]. The trailer pulls on the transport truck with a force a) of zero b) of less than 600 N is the truck is slowing down c) equal to 600 N only if the truck is moving at constant velocity d) equal to 600 N no matter ...
Sunday, January 19, 2014 at 2:10pm

Earth Science
Silver has a density of 10.5 g/cm cubed, and gold has a density of 19.3 g/cm cubed. Which would have the greater mass, 5cm cubed of silver or 5 cm cubed of gold?
Friday, January 17, 2014 at 6:29pm

science help plzzz
1. Which of the following statements best defines tides? (1 point) when waves get bigger because of an approaching storm the rise and fall of ocean water that occurs about every 12.5 hours the rise of ocean water that occurs 12 times a day a giant wave that can be extremely ...
Friday, January 17, 2014 at 5:29pm

math
a pit is dug in the shape of a cuboid with dimensions 10m*8m*3m. the earth taken out is spread evenly on a rectangular plot of land with dimensions 40m*30m. what is the increase in the level of the plot.
Friday, January 17, 2014 at 7:45am

science
tell what you believe would happen if the earth suddenly stopped spinning and you were in the part of the world that had sunlight 24 hours a day. Include such things as how this would affect your sleep, work, school and crime.
Friday, January 17, 2014 at 7:06am

science
Tell what you believe would happen if the earth suddenly stopped spinning and you were in the part of the world that had 24 a day.Include such things as how this would affect your sleep, work, school and crime?
Thursday, January 16, 2014 at 10:45pm

Earth Science
Analogy: melting is to freezing as partial melting is to _______? a. partial freezing b. magma. c. boiling. d. fractional crystallization.
Thursday, January 16, 2014 at 9:24am

science
1.Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? -a solar eclipse -a lunar eclipse -a total lunar eclipse -a penumbra 2.Which of the following statements about a lunar eclipse is true? -A lunar eclipse can occur when the ...
Wednesday, January 15, 2014 at 11:39am

Science
1.Which type of eclipse would you expect to see if the moon passes directly between Earth and the sun? -a solar eclipse -a lunar eclipse -a total lunar eclipse -a penumbra 2.Which of the following statements about a lunar eclipse is true? -A lunar eclipse can occur when the ...
Wednesday, January 15, 2014 at 9:57am

Physics
If you stood atop a ladder that was so tall that you were twice as far from Earth's center, how would your weight compare with its present value?
Tuesday, January 14, 2014 at 10:15pm

Physics
To better comprehend the magnitude of the gravitational force between Earth and the moon, pretend gravity is turned off and the pull replaced by the tension in a steel cable need to be?
Tuesday, January 14, 2014 at 10:13pm

8th Grade Earth Science Help?
Which of the following terms refers to the time it takes for one-half of the radioactive atoms in a sample of a radioactive element to decay? - relative age - absolute age - potassium-argon data - half-life** Is my answer correct?
Tuesday, January 14, 2014 at 7:05pm

science
all of the following are explanations for glacial periods EXCEPT. a. varying solar energy b. volcanism c. biological organisms d. Earth's orbit's precession
Tuesday, January 14, 2014 at 1:27pm

PHYSICS
n the lecture, we discussed the case of an isothermal atmosphere where the temperature is assumed to be constant. In reality, however, the temperature in the Earth's atmosphere is not uniform and can vary strongly and in a non-linear way, especially at high altitude. To a ...
Monday, January 13, 2014 at 5:34pm

Science
1. Which of the following can be expected to occur as climate change continues on Earth? (1 point) decreased melting of sea ice decreased migration of pests and pathogens increased freshwater sources increased coastal flooding 2. Which piece of children’s’ playground...
Monday, January 13, 2014 at 3:05pm

Science
1. Which of the following can be expected to occur as climate change continues on Earth? (1 point) decreased melting of sea ice decreased migration of pests and pathogens increased freshwater sources increased coastal flooding 2. Which piece of children’s’ playground...
Sunday, January 12, 2014 at 8:26pm

PHYSICS(HELP)
In the lecture, we discussed the case of an isothermal atmosphere where the temperature is assumed to be constant. In reality, however, the temperature in the Earth's atmosphere is not uniform and can vary strongly and in a non-linear way, especially at high altitude. To a...
Sunday, January 12, 2014 at 9:25am

maths
The total population of the earth was estimated to be 6.42 billion people.Given that the total land surface area of the earth is about 1.5×10^8km^2.Find the average number of people living in 1 km^2 of land on earth,correct to 2 significant figures.Thanks a lot for ...
Saturday, January 11, 2014 at 11:02pm

science help!
A satellite is placed in orbit 100 km above the surface of the earth (radius = 6370 km, mass = 5.98 x 1024 kg). If the satellite has a mass of 1500 kg, what is the force of gravity acting on it?
Friday, January 10, 2014 at 7:12pm

physics
A satellite is placed in orbit 100 km above the surface of the earth (radius = 6370 km, mass = 5.98 x 1024 kg). What is the value of the acceleration of gravity at that altitude as a percentage of the acceleration at the surface of the earth?
Friday, January 10, 2014 at 6:34pm

What Does This Mean?
This looks like a fairly straightforward question, but I am not getting exactly what they are trying to say. "Earth's energy sources include both renewable and nonrenewable resources. Name at least three sources of energy that could be used in your house. Then ...
Friday, January 10, 2014 at 1:47pm

Science
Why is freshwater a limited resource? A. because most water on Earth is in lakes B. because most water on Earth is in clouds C. because most water on Earth is in the ground D. because most water on Earth is saltwater D
Friday, January 10, 2014 at 1:14pm

Science
Which compound causes the depletion of Earth's ozone layer? A. ultraviolet radiation B. chlorofluorocarbon C. carbon dioxide D. sulfuric acid B How does a nuclear power plant produce energy? A. through solar panels B. through nuclear fission reactions C. through geothermal...
Friday, January 10, 2014 at 1:11pm

Classical mechanics
In the lecture, we discussed the case of an isothermal atmosphere where the temperature is assumed to be constant. In reality, however, the temperature in the Earth's atmosphere is not uniform and can vary strongly and in a non-linear way, especially at high altitude. To a...
Friday, January 10, 2014 at 10:07am

Physics Classical Mechanics Help ASAP
In the lecture, we discussed the case of an isothermal atmosphere where the temperature is assumed to be constant. In reality, however, the temperature in the Earth's atmosphere is not uniform and can vary strongly and in a non-linear way, especially at high altitude. To a...
Friday, January 10, 2014 at 8:01am

Science
1. Which of the following can be expected to occur as climate change continues on Earth? (1 point) decreased melting of sea ice decreased migration of pests and pathogens increased freshwater sources increased coastal flooding 2. Which piece of children’s’ playground...
Friday, January 10, 2014 at 12:47am

Earth science
In a few sentences, explain how information from paleoglaciation and paleomagnetism support the idea that continental plates have moved over the past several million years.
Friday, January 10, 2014 at 12:00am

earth
Suppose a geologist is studying two distinct areas next to a spreading ridge. The magnetic direction of the minerals in the oldest area is opposite to the magnetic direction of minerals in the newest area. (a) Which area is closest to the centre of the ridge, the older or ...
Thursday, January 9, 2014 at 11:59pm

Earth Science
The Rocky Mountains are more jagged than the Appalachian Mountains. This suggests that • erosion has worn down the Appalachian Mountains more than the Rocky Mountains. • the Rocky Mountains are older. • the Appalachian Mountains are more likely to experience ...
Thursday, January 9, 2014 at 4:09pm

Science help urgent :/
I need to help my brother with this, he waited till the last minute to complete his homework... 1. _________ is a solid fossil fuel that forms from plant remains. Coal Hydrocarbon Natural gas Petroleum 2. Air pollution can be controlled by permitting more storm runoff. burning...
Wednesday, January 8, 2014 at 10:45pm

SCIENCE HELP PLEASE
Suppose the moon rotated on its axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *HELP ME PLEASE*
Wednesday, January 8, 2014 at 5:59pm

Science
What would be the effect on the seasons and the northern and southern hemispheres if Earth were not tilted? Explain your answer. *PLEASE HELP ME*
Wednesday, January 8, 2014 at 5:55pm

EARTH SCIENCE
1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon D? 4. A stream channel is formed when water A. carves a very deep and wide channel into rock. B. carries minerals into the ocean. C. creates a depression, which forms a lake. D...
Wednesday, January 8, 2014 at 3:10pm

EARTH SCIENCE
1. Which gas is a source of natural groundwater pollution? A. Carbon B. Oxygen C. Hydrogen D. Radon C? 2. Which of the following statements best describes chemical weathering? A. It happens only in cool environments. B. It's the type of weathering in which rocks and ...
Tuesday, January 7, 2014 at 10:41pm

Physics help quick!
22. What does it mean for a force to act in accordance with an inverse square law? The square of the force is inversely proportional to the distance. The force decreases if the distance increases. The force is directly proportional to 1/r2 where r is the distance. The force is...
Tuesday, January 7, 2014 at 2:28pm

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 ...
Tuesday, January 7, 2014 at 1:52pm

Science check answer quick!
I really do not understand Number 7 Which of these does Newton's law of universal gravitation imply? (Points : 1) The force of gravity between two objects is inversely proportional to the product of the two masses. <-- Earth's gravity acts on people inside a space ...
Tuesday, January 7, 2014 at 12:43pm

please help me!! with this science!!!!!
Multiple Choice 1. Which sphere of the Earth system contains all living organisms? (1 point) atmosphere biosphere geosphere hydrosphere 2. Which of the following statements best describes the geosphere? (1 point) the sphere that consists of solid rock layers near Earth’s ...
Tuesday, January 7, 2014 at 4:52am

physics
What is the ratio of the spin angular momentum of the earth and its orbital angular momentum about the sun. The mean radius of the earth is R=6400km. The radius of the earth's orbit is r=1.5*10^8km. You may assume the mass of the earth is uniformly distributed throughout ...
Monday, January 6, 2014 at 1:06pm

science
Suppose the moon rotated on it axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *PLEASE HELP ME WITH THIS QUESTION*
Sunday, January 5, 2014 at 12:41pm

Science help.
Where is most freshwater on Earth found? lakes and rivers oceans and seas underground ice caps and glaciers How does algal growth caused by agricultural waste kill marine organisms? by blocking sunlight and depleting oxygen by increasing oxygen levels in the water by ...
Saturday, January 4, 2014 at 6:24pm

physics
rank the average gravitational force from greatest to least between (a) sun and mars (b)sun and moon (c) sun and earth include an explanation PLEASE!!!!
Friday, January 3, 2014 at 12:22pm

biology - natural selection
Which of these is the foundation for relative dating? A. Earth is very old. B. Deeper rock strata are older. C. Radioisotopes decay at a constant rate. D. Organisms can be closely related to each other.
Thursday, January 2, 2014 at 9:49pm

science
Suppose the moon rotated on it axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *PLEASE HELP ME WITH THIS QUESTION*
Thursday, January 2, 2014 at 6:02pm

Physics
The sun outputs 1380 W/m^2 of energy at the earth's surface. A small rectangular las has the following dimensions: 1km wide, 1.4km long, and 300m deep A) Calculate the thermal energy added to the lake if exposed to 12h of direct sunlight. B) calculate the increase in ...
Thursday, January 2, 2014 at 3:46pm

science
Suppose the moon rotated on it axis just as quickly as Earth. Would you still always see the same side of the moon from Earth? *PLEASE HELP ME WITH THIS QUESTION* Answer this Question
Thursday, January 2, 2014 at 11:07am

science/planets
Q: What two things does Earth have in common with the outer planets called gas giants? A: A)relative temperatures above freezing B)moons and magnetic field C)fairly long days and short nights D)volcanic activity and geysers
Monday, December 30, 2013 at 2:28pm

Science help.....
Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time period not really considered a partof Earth’s ...
Monday, December 30, 2013 at 12:55pm

physics
We release an object of mass M at zero speed at a distance of 2*10^6 Km from the center of the earth. What is the speed at which the object hits the earth? G=6.67*10^-11; g= 9.8 m/s; M=5.97*10^24; r=6.3781*10^6 Suppose the mass of the object is M= 500 kg. What is the kinetic ...
Friday, December 27, 2013 at 4:34pm

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 3:28am

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

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