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August 22, 2014

Homework Help: Science: Earth

Recent Homework Questions About Earth

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Physics
How can one solve this equation for t? Y = 1.3 + 18.8 t - (g/2) t^2 = 0 (Assume g = 9.8 m/s^2, the value on Earth)
Saturday, January 21, 2012 at 9:56pm

Math
How can one solve this equation for t with decimals? Y = 1.3 + 18.8 t - (g/2) t^2 = 0 (Assume g = 9.8 m/s^2, the value on Earth)
Saturday, January 21, 2012 at 4:48pm

physics
A de-orbit burn, similar to that presented in the previous math problem, has been performed. During this de-orbit burn a pre-calculated ∆V (delta V, change in velocity) of 290 ft/s (or 88.4 m/s) will be used to decrease the Shuttle’s altitude from 205 miles to 60 ...
Friday, January 20, 2012 at 6:55pm

earth
Body on surface of earth weighs 400 lb. Radius of earth is about 4000miles. If same body were placed on 4000 mile high tower, what would its weight be
Friday, January 20, 2012 at 6:19pm

physics
what is the magnitude of the centripetal force acting on the earth as it orbits the sun assuming a circular orbital speed of 3.00 X 10^4 meters per second
Thursday, January 19, 2012 at 10:36pm

Physics
How do you calculate the earth's gravitational pull on astronauts?
Thursday, January 19, 2012 at 12:18pm

science
A person 12,000 km from the center of earth has a mass of 70 kg and weighs 182 N. What is the acceleration due to gravity at this altitude?
Wednesday, January 18, 2012 at 8:25pm

Astronomy 1010
The International Space Station orbits approximately 350 km above the Earth's surface. (The Earth's radius is 6,378 km.) Are the astronauts beyond the pull of Earth's gravity? Explain your reasoning.
Tuesday, January 17, 2012 at 9:19pm

Astronomy 1010
The International Space Station orbits approximately 350 km above the Earth's surface. (The Earth's radius is 6,378 km.) Are the astronauts beyond the pull of Earth's gravity? Explain your reasoning.
Tuesday, January 17, 2012 at 8:25pm

Earth Science
True or false? ------------------------- Although there is scientific evidence and many scientific theories about the origin of the universe, how it all happened remains a question. Which statement is true? ------------------------- The perfect cosmological principle is the ...
Tuesday, January 17, 2012 at 12:06pm

Literacy
Which of the following publications are both listed under the "Magazines" results? A. Science News and Earth Island B. Astronomy and Science C. Odyssey and Natural History D. The Economist and American Scientist my answer is D
Tuesday, January 17, 2012 at 11:24am

Probability
Automated chemical synthesis of DNA has made it possible to custom-order moderate length DNA sequences from commercial suppliers. Assume that a single nucleotide weighs about 5.6 X 10^-22 grams and that there are four kinds of nucleotides. If you wish to order all possible DNA...
Monday, January 16, 2012 at 3:00pm

Physic
The moon orbits the earth a a speed of 1.02 Kilometers per second. Use dimensional analysis to convert this speed into miles per hour. is the answer .28 m/s????
Saturday, January 14, 2012 at 10:37pm

PHYSIC
THE MOON ORBITS THE EARTH AT A SPEED OF 1.02 KILOMETERS PER SECOND. USE DIMENSIONAL ANALYSIS TO CONVERT THIS SPEED INTO MILES PER HOUR.
Saturday, January 14, 2012 at 10:15pm

Physics
Calculate the force of gravity on a 2 kg mass at Earth’s surface. The mass of Earth is 6 * 10 ^24 kg, and its raidus is 6.4 * 10 ^ 6.
Saturday, January 14, 2012 at 3:06pm

physics
Calculate Earth’s gravitational force on the Shuttle astronauts while orbiting at an altitude of 220 miles (or 354 km) above Earth’s surface.
Saturday, January 14, 2012 at 1:20pm

earth
what is the chemical formula of chock?
Friday, January 13, 2012 at 9:36pm

PHYSICS
Find the period time of the moon from the following values, R=6400km,the distance between the earth and the moon=384000km,g=9.8m/s2
Friday, January 13, 2012 at 11:11am

Maths
The earth is approximately a sphere of average diameter 12740km. The smallest of the planets is Mercury, also spherical, with average diameter 4840km. Determine what percentages (to the nearest hundredth) the volume and surface area of Mercury are of those of the Earth.
Thursday, January 12, 2012 at 4:13pm

Precalculus
A nautical mile equals the length of arc subtended by a central angle of 1 minute on a great circle on the surface of Earth. If the radius of Earth is taken as 3960 miles, express 1 nautical mile in terms of ordinary, or statute, miles.
Thursday, January 12, 2012 at 12:39pm

physics
The earth is moving around the sun,now a satalite with its escape velocity thrown out from the earth,if the earth will stop then escape velocity of the satalite will same or not??
Wednesday, January 11, 2012 at 9:29pm

physics
A communications satellite is in an orbit that is 3.1 multiplied by 107 m directly above the equator. Consider the moment when the satellite is located midway between Quito, Equador, and Belem, Brazil; two cities almost on the equator that are separated by a distance of 3.6 ...
Wednesday, January 11, 2012 at 9:11pm

physics
2. Saturn has a radius of about 9.0 earth radii, and a mass 95 times the Earth’s mass. Estimate the gravitational field on the surface of Saturn compared to that on the Earth
Wednesday, January 11, 2012 at 9:23am

Math
It takes 5 1/3 minutes for light from the sun to reach earth. The Moon is closer to earth, so it,s light reaches earth faster about 5 19/60 minutes faster than from the sun. How long does light from the moon take to reach earth.
Tuesday, January 10, 2012 at 8:44pm

Math
Make a picture of: a model of the earth, a stop sign, a dinner plate and a clock. Which one doesnt belong? Why?
Tuesday, January 10, 2012 at 8:24pm

calculus
A projectile is shot upward from the surface of the Earth with an initial velocity of 120 meters per second. What is its velocity after 5 seconds?
Monday, January 9, 2012 at 8:14pm

geometry
what is the maximum broadcasting radio from a radio tower 1800ft tall the radius of earth is 3960 miles and you can assume thtat the ground around the tower is nearly flat
Monday, January 9, 2012 at 7:27pm

Maths
A satellite takes 93.8 minutes to orbit the earth. If the diameter of the earth is 12740km approximately and the satellite is at a height of 32km above the earth's surface, find the average speed of the satellite in km/h Working out please
Monday, January 9, 2012 at 5:06pm

Physics
1. If a mass on a spring and a pendulum have the same period on the moon where the gravity is about 1/6 of its value on the Earth, which one will run faster on the Earth? a. The mass on the spring. b. The pendulum. c. They will both run the same. d. It depends on which one has...
Monday, January 9, 2012 at 4:10pm

Physics
A pendulum has a period of 0.70 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.31 that on Earth?
Monday, January 9, 2012 at 12:32am

science
What are 2 ways resources are brought up from under Earth's surface?
Saturday, January 7, 2012 at 6:37pm

Science
What are 3 ways resources are brought up from the earth's surface?
Saturday, January 7, 2012 at 2:09pm

re-post statistics
a weather girl predicts there is a 50% chance of rain and a 10% chance that the rain will turn into snow. What is the probability that it will snow? statistics - Ms. Sue, Friday, January 6, 2012 at 9:08pm What on earth is a "weather girl?" That's what the ...
Saturday, January 7, 2012 at 8:03am

physics
I will be thank full to u if u help me in solving the below problem If the change in the value of g at a height h above the surface of the earth is same as depth x below the surface of the earth, then (h<<R)
Friday, January 6, 2012 at 9:47pm

Physics
An object has a mass of 115 kg on the Earth. What is the weight of the object on the surface of a planet where the acceleration due to gravity is 5.6 m/s2?
Thursday, January 5, 2012 at 11:13pm

Science
Where is most of the freshwater on Earth? F. lakes G. glaciers H. rivers J. oceans
Thursday, January 5, 2012 at 6:39pm

physics
apollo astronaunts took a nine iron to the moon and hit a golf ball about 180 m ! Assuming that the swing, launch angle, and so on, were the same as on earth where the same astronaut could hit it only 35 m, estimate the acceleration due to gravity on the surface of the moon. (...
Thursday, January 5, 2012 at 4:46pm

earth
what different elements are used in photosynthesis?
Wednesday, January 4, 2012 at 7:34pm

geometry
Earth’s radius is about 4,000 mi. To the nearest mile, what is the distance a person can see on a clear day from an airplane 5 mi above Earth? help please!
Wednesday, January 4, 2012 at 5:49pm

english
3. Which one of the following statements is an example of a complex sentence? A. Sparrows at the bird feeder compete for seeds. B. Neap tide is the best time for digging clams. [C. The earth was spinning when Lucas first saw Lucille.] D. The crescent moon is a symbol of Islam.
Wednesday, January 4, 2012 at 3:10pm

Living environment
1.All of Earth's water, land, and atmosphere within which life exists is known as a population b. an ecosystem c.the biosphere d. a biotic community IS THE ANSWER C
Tuesday, January 3, 2012 at 5:05pm

English
What is the meaning of "When once you have tasted flight, you will forever walk the Earth with your eyes turned skyward, for there you have been, and there you will always long to return"?
Tuesday, January 3, 2012 at 2:08pm

physics
The earth's atmosphere extends to a height of nearby 200KM above its surface there many be explosion and noises taking place in the outer space but we do not hear them.why?
Tuesday, January 3, 2012 at 7:44am

Physics Repost
A at disk of material has the same mass as the Earth, 5.98E+24 kg, and has a radius of 6.25 E+07 m. Point A is located a distance of 5.8E+06 m above the center of the disk. Point B is located right at the center of the disk. Treat all of the mass as if it were located in the x...
Sunday, January 1, 2012 at 2:55pm

Physics
A at disk of material has the same mass as the Earth, 5.98E+24 kg, and has a radius of 6.25 E+07 m. Point A is located a distance of 5.8E+06 m above the center of the disk. Point B is located right at the center of the disk. Treat all of the mass as if it were located in the x...
Saturday, December 31, 2011 at 10:40am

english help in Revising
Hi I answered all my question for this lesson correct only 4 were incorrect I really need help correcting them Here is my work #6-What is the conflict in the story? Be sure to discuss all the conflicts. #6 – The first conflict was Jacks mother and jack vs the cow. The cow...
Saturday, December 31, 2011 at 6:41am

Geometry
A city has a scale model of the solar system nearly 6 km long. The model's scale is 1 km : 1 billion km. a. Earth is 150,000,000 km from the Sun. How many meters apart are Earth and the Sun in the model?
Friday, December 30, 2011 at 11:24pm

earth
A 5.0-kilogram sphere, starting from rest, falls freely 22 meters in 3.0 seconds near the surface of a planet. Compared to the acceleration due to gravity near Earth’s surface, the acceleration due to gravity near the surface of the planet is approximately
Thursday, December 29, 2011 at 4:24pm

Physics
The De-orbit Burn The Shuttle must reduce its velocity at a pre-calculated point in its orbit in order to return to Earth. In order to reduce the velocity and change the orbit of the Shuttle, a maneuver called the de-orbit burn is performed. For this maneuver, the Shuttle is ...
Wednesday, December 28, 2011 at 10:59pm

Physics
A star with the same mass and diameter as the sun rotates about a central axis with a period of about 29.2 days. Suppose that the sun runs out of nuclear fuel and collapses to form a white dwarf star with a diameter equal to that of the earth. Assume the star acts like a solid...
Friday, December 23, 2011 at 1:25pm

English
Please look over my answer. The first set of questions all refer to this poem: When in disgrace with fortune and men's eyes I all alone beweep my outcast state, And trouble deaf heaven with my bootless cries, And look upon myself, and curse my fate, Wishing me like to one ...
Wednesday, December 21, 2011 at 2:01pm

physics
the gravity that sun has on the moon is about 2 times more than the gravity from earth so why doesn't moon run away from earth to sun?
Wednesday, December 21, 2011 at 6:06am

earth
Determine the gravitational force that you exert on another person 1.90 m away. Assume that you and the other person are point masses of 75.0 kg each.
Monday, December 19, 2011 at 10:10pm

physics
A 80 kg man weighs 784 N on the Earth's surface. How far above the surface of the Earth would he have to go to "lose" 15% of his body weight?
Monday, December 19, 2011 at 6:31pm

earth
what factors contribute to the formation of fertile, deep topsoil in temperate regions?
Sunday, December 18, 2011 at 10:29pm

9th Grade Classes
I was reading my school district program of studies and I found this section in for high school coures. - English 9H - Integrated Algebra A - Earth Science - Global History and Geography I or H - French Beg. 1 - Orchestra (a days)/ Health (b days) - Studio Art I - African ...
Sunday, December 18, 2011 at 5:36pm

science
a person weighs 815 N on the earth, what is the persons weight on the moon?
Sunday, December 18, 2011 at 10:13am

kv khurda
an artificial satellite is orbiting the earth. A bomb is released from the satellite. The bomb will (a)explode due to the heat generated by the friction of air (b)fall freely on the earth (c)escape into outer space (d)orbit the earth along with the satellite
Saturday, December 17, 2011 at 1:10am

Physics
Starting from Newton’s law of universal gravitation, show how to find the speed of the moon in its orbit from the earth-moon distance of 3.9 × 108 m and the earth’s mass. Assume the orbit is a circle.
Friday, December 16, 2011 at 10:37am

Physics
Saturn has a radius of about 9.0 earth radii, and a mass 95 times the Earth’s mass. Estimate the gravitational field on the surface of Saturn compared to that on the Earth
Friday, December 16, 2011 at 10:20am

PHI 103
After being told that she is being punished for lying, a child responds by telling her mother that she also lied. This response may involve which fallacy? Ad homimen (tu quoque) Ad verecundiam (ex libris) Ad misericordiam (ex ante) Ad baculum (antebellum) I am confused about ...
Thursday, December 15, 2011 at 9:37pm

physical science
Which one of these statements is true about Copernicus? a. His model included planetary orbits that were circular. b. He believed that Ptolemy's ideas about the shape of orbits were correct c. His model could not account for retrograde motion of Mars. d. His model of the ...
Thursday, December 15, 2011 at 8:59pm

physical science
The declination of the Sun on March 21 on Earth is
Thursday, December 15, 2011 at 8:53pm

physics
radius of the earth = 6.37 × 10^6 what is the speed of a 90.6 kg person at the equator? I know that F=m(v^2/r) but I don't know the force. Is there another equation that I'm missing or I'm using the wrong one? Thanks
Thursday, December 15, 2011 at 4:35pm

physics
An early major objection to the idea that Earth is spinning on its axis was that Earth would turn so fast at the equator that people would be thrown into space. Given : radius earth = 6.37 × 10^6 m , mass earth = 5.98 × 10^24 kg , radius moon = 1.74 × 10^6 m...
Thursday, December 15, 2011 at 4:26pm

Physics
Calculate the position of the center of mass of the following pairs of objects. Use a coordinate system where the origin is at the center of the more massive object. Give your answer not in meters but as a fraction of the radius as requested. Get data from inside the front ...
Thursday, December 15, 2011 at 3:53pm

physics
9. The surface of the earth is approximately 6,400 km from its center. If the mass of the earth is 6.0 x 1024 kg, what is the acceleration due to gravity near the surface?
Thursday, December 15, 2011 at 2:54am

Calculus
Assuming the earth is a perfect sphere of raius 3950 miles, find (in inches) d. d, is the difference between the arc and a straight line.
Wednesday, December 14, 2011 at 1:48pm

Physics
The Near Earth Asteroid Rendezvous (NEAR), after traveling 2.1 billion km, is meant to orbit the asteroid Eros at a height of about 15 km from the asteroid's center. Eros is roughly box-shaped, with dimensions 40 km 6 km 6 km. Assume Eros has a density (mass/volume) of ...
Tuesday, December 13, 2011 at 10:02pm

physics
The Near Earth Asteroid Rendezvous (NEAR), after traveling 2.1 billion km, is meant to orbit the asteroid Eros at a height of about 15 km from the asteroid's center. Eros is roughly box-shaped, with dimensions 40 km 6 km 6 km. Assume Eros has a density (mass/volume) of ...
Tuesday, December 13, 2011 at 6:36pm

physics
The Near Earth Asteroid Rendezvous (NEAR), after traveling 2.1 billion km, is meant to orbit the asteroid Eros at a height of about 15 km from the asteroid's center. Eros is roughly box-shaped, with dimensions 40 km 6 km 6 km. Assume Eros has a density (mass/volume) of ...
Tuesday, December 13, 2011 at 5:23pm

science
1. What was wrong or why do you think people rejected Wegner's idea of continental drift? 2. Explain why some partly molten lava rises toward Earth's surface.
Tuesday, December 13, 2011 at 4:12pm

Physics
At a certain location, the horizontal component of the earth's magnetic field is 2.3 x 10^-5 T, due north. A proton moves eastward with just the right speed, so that the magnetic force on it balances its weight. Find the speed of the proton.
Monday, December 12, 2011 at 6:41pm

algebra
a ball is thrown straight up into the air with an initial velocity of 128 ft/sec, the total amount of time in seconds that it takes the object to return to the earth can be calculated by using the quadratic, 128t-16t^2=0. Determine the "flight time," t, of the ball.
Monday, December 12, 2011 at 1:45pm

earth
Why does western North America have volcanoes, earthquakes, mountain ranges, and small valley glaceiers and why are these same features not present on the eastern part of the continent? How could this situation be reversed?
Sunday, December 11, 2011 at 9:16pm

trig
A satellite is in geostationary orbit 22,500 miles above the earth. IF the radius of the earth is 3,960 miles, how fast is the satellite moving in miles per day? How fast is the satellite moving in miles per hour?
Sunday, December 11, 2011 at 8:02pm

science
how do geologists know the earth is layered inside?
Sunday, December 11, 2011 at 2:58pm

science
which hemisphere of the earth contains the greater proportion of ocean surface?
Sunday, December 11, 2011 at 2:57pm

science
until recently, many scientists were tentative in their acceptance for the theory of the chemical evolution of life on earth. what has changed their minds?
Sunday, December 11, 2011 at 2:56pm

physics
A 2.5 kg mass weighs 23.75 N on the surface of a planet similar to Earth. The radius of this planet is roughly 7.7 × 10 6 m.Calculate the mass of of this planet. The value of the universal gravitational constant is 6.67259 × 10−11N · m2/kg2
Sunday, December 11, 2011 at 2:45pm

physics
A satellite moves in a circular orbit around the Earth at a speed of 5.8 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 1024 kg. The value of the universal ...
Sunday, December 11, 2011 at 9:45am

physics
A 3.3 kg mass weighs 30.03 N on the surface of a planet similar to Earth. The radius of this planet is roughly 7.4 × 106 m. Calculate the mass of of this planet. The value of the universal gravitational constant is 6.67259 × 10−11 N · m2/kg2. Answer in...
Sunday, December 11, 2011 at 9:40am

physics
A satellite moves in a circular orbit around the Earth at a speed of 6.1 km/s. Determine the satellite’s altitude above the surface of the Earth. Assume the Earth is a homogeneous sphere of radius 6370 km and mass 5.98 × 10 24 kg. The value of the universal ...
Saturday, December 10, 2011 at 6:00pm

~~~~~College Algebra
Question: Various models have been used to make projections of growing populations. Thomas Malthus made one of the most famous conjectures of such a model in the early 19th century. Within Malthus’ claim was that the population of Earth would inevitably outstrip its means...
Saturday, December 10, 2011 at 5:58pm

physics
A 2.5 kg mass weighs 23.75 N on the surface of a planet similar to Earth. The radius of this planet is roughly 7.7 × 10^6 m. Calculate the mass of of this planet. The value of the universal gravitational constant is 6.67259 × 10^−11N · m2/kg2. Answer ...
Saturday, December 10, 2011 at 5:35pm

English
I urgently need you to revise this paragraph on dinosaurs. I need to simplify it using synonyms. 1) Whatever killed off (synonym??) the dinosaurs almost certainly had a bearing (I need a proper synonym) on the rest of the mass extinction, which was on a global scale and ...
Saturday, December 10, 2011 at 4:56pm

science
One kg weighs 9.8 N on Earth. Would it weigh more or less on the Moon?
Friday, December 9, 2011 at 9:34pm

physics
The mass of the Mars is about 0.11 the mass of the earth, its radius is 0.53 that of the earth, and the acceleration due to gravity at the earth's surface is 9.80 {\rm m}/{\rm s}^{2}.
Friday, December 9, 2011 at 7:01pm

Physics
A rocket leaves a launch pad at liftoff with a great deal of upward momentum. What was initially given downward momentum? a. the launch pad b. the astronauts aboard the rocket c. the expelled fuel d. the entire Earth
Friday, December 9, 2011 at 8:04am

Physics
What is the magnitude of the earth's gravitational field at sea level?
Thursday, December 8, 2011 at 9:24pm

Physics
Augustine continues to run around. He gets to the park and has the overwhelming urge to jump off a cliff and try to fly. He does so at an angle of 50 degrees to the horizontal while running at 14.5m/s. With his arms flapping, he rises in the air. a) what is the highest point ...
Thursday, December 8, 2011 at 7:15pm

Physics
Augustine continues to run around. He gets to the park and has the overwhelming urge to jump off a cliff and try to fly. He does so at an angle of 50 degrees to the horizontal while running at 14.5m/s. With his arms flapping, he rises in the air. a) what is the highest point ...
Thursday, December 8, 2011 at 6:58pm

Science
Which characteristic tells how the Earth and the moon are alike? A. Both have similar weath conditions B. Both rotate around the Sun C. Both receive light from the Sun D. Both are the same size I think its C
Thursday, December 8, 2011 at 4:36pm

physics
the mass of a body is 50 kg on the surface of the earth.find its weight on the surface of a planet whose mass is double than the mass of the earth and radius is 5 times the radius of the earth
Thursday, December 8, 2011 at 7:33am

Social Studies
There are 8 languages on he peace pole that all state "may pece prevail on earth" what languages are used? I need help on this plz help thank u
Tuesday, December 6, 2011 at 8:29pm

science
What is the magnitude of g at a height above Earth's surface where free fall acceleration equals 6.5m/s^2?
Tuesday, December 6, 2011 at 6:37pm

Living environment
in what period of earth time did the great increase in animal diveristy
Tuesday, December 6, 2011 at 5:55pm

geography
Approximately what percent of Earth’s species live in rainforests? A. 75% B. 25% C. 50% D. 90% i think its B
Monday, December 5, 2011 at 11:29am

Physics
Two satellites A and B of the same mass are orbiting Earth in concentric orbits. The distance of satellite B from Earth’s center is twice that of satellite A. What is the ratio of the tangential speed of B to that of A?
Monday, December 5, 2011 at 11:26am

earth
Rocks that become hot enough to melt and flow are referred to as ___ by scientists
Sunday, December 4, 2011 at 9:15pm

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