Homework Help: Science: Earth

Recent Homework Questions About Earth

physical science with earth science
Write a balanced chemical equation for the reaction for propane C3H8 burning in oxygen to for carbon dioxide and water vapor
Thursday, December 2, 2010 at 6:31pm

English
Thank you very much for your corrections. Here are some more sentences I need to check.Thank you. 1)The Renaissance derived from the medieval background a general conception of order. The universal order was conceived in the forms of a chain of being and a cosmic dance. 2)The ...
Thursday, December 2, 2010 at 6:30pm

Earth Science
Describe how Earth would be different today if it contained no radioactive material. What would the consequences be for the Earth’s interior layers?
Thursday, December 2, 2010 at 6:28pm

6th grade
Scientists have calculated that the Moon's revolution around Earth is increasing by about .015 s per century. At this rate, how long would it take the length of a month to increase by one full day?
Thursday, December 2, 2010 at 5:53pm

chemistry
An atom has a valence shell configuration of ns2p5. To which group of elements in the periodic table does it belong? transition metals Halogens alkaline earth metals alkaline metal
Wednesday, December 1, 2010 at 11:13pm

English 12 U
Please ignore my previous post, I accidentally posted my rough draft Okay for English 12 U, I'm doing a literary essay for Life of Pi, by Yann Martel. The topic of my essay is Martel (author's) depiction of setting in Canada and India. (Role of setting) I'd like ...
Wednesday, December 1, 2010 at 7:48pm

physics problem ???
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 of mars= 0.38 gravity on ...
Wednesday, December 1, 2010 at 7:43pm

Physics-Please help
I have a question about the International Space Station-Its been orbiting earth at 350km-If the radius of the earth is 6,370 km, what is the period of orbit for the Space Station? Secondly, if it was moved to a geosynchronous orbit, what would the new altitude of the station ...
Wednesday, December 1, 2010 at 7:35pm

Physics
I have a question about the International Space Station-Its been orbiting earth at 350km-If the radius of the earth is 6,370 km, what is the period of orbit for the Space Station? Secondly, if it was moved to a geosynchronous orbit, what would the new altitude of the station ...
Wednesday, December 1, 2010 at 5:45pm

1st grade
how many miles does the earth travles a minute or second ????
Tuesday, November 30, 2010 at 8:23pm

physics
Felicia, the ballet dancer, has a mass of 45.0 kg. a.) What is Felicia's weight on Earth? b.) What is Felicia's mass o Jupiter, where the acceleration due to gravity is 25.0 m/s2? c.) What is Felicia's weight on Jupiter?
Tuesday, November 30, 2010 at 6:33pm

Math
The ocean covers about 71% of the Earth's surface. If the total surface area of the Earth is about 510 million square kilometers, how many square kilometers are covered by the ocean? 362.10
Tuesday, November 30, 2010 at 12:35am

Trigonometry
The Chrysler Building casts a shadow approximately 130 feet long on the street when the Sun's rays form an 82.9 angle with the Earth. Approximately how tall is the building? Round you answer to four decimal places.
Sunday, November 28, 2010 at 11:40pm

physics
Take the mass of the Earth to be 5.98 × 1024 kg. If the Earth’s gravitational force causes a falling 52 kg student to accelerate downward at 9.8 m/s2, determine the upward accelera- tion of the Earth during the student’s fall. Answer in units of m/s2.
Sunday, November 28, 2010 at 7:55pm

physics
A laboratory centrifuge on earth makes n rpm (rev/min) and produces an acceleration of 7.00 g at its outer end. What is the acceleration (in g's, i.e., acceleration divided by g) at a point halfway out to the end?
Saturday, November 27, 2010 at 1:05pm

physics
You weigh 516 N at sidewalk level outside the World Trade Center in New York City. Suppose that you ride from this level to the top of one of its 410 m towers. Ignoring Earth's rotation, how much less would you weigh there (because you are slightly farther from the center ...
Friday, November 26, 2010 at 6:30pm

physics
A laboratory centrifuge on earth makes n rpm (rev/min) and produces an acceleration of 3.30 g at its outer end. This centrifuge is now used in a space capsule on the planet Mercury, where g mercury is 0.378 what it is on earth. How many rpm (in terms of n) should it make to ...
Friday, November 26, 2010 at 6:22pm

physics
A laboratory centrifuge on earth makes n rpm and produces an acceleration of 3.20 g at its outer end. A) What is the acceleration (in g's, i.e., acceleration divided by g) at a point halfway out to the end? B) This centrifuge is now used in a space capsule on the planet ...
Friday, November 26, 2010 at 4:58pm

science
1. describe the relationship between the mass of a planet and the number of satellites it has. 2. an observer on earth can watch venus go through phases much like earths moon does. expleain why this is so? i looked all through my text book for the answer but coundn't find ...
Friday, November 26, 2010 at 12:22pm

physics
a geosynchronous satellite orbits at a distance from earth's center of about 6.6 earth radii and takes 24 h to go around once. what distance in meters does the satellite travel in one day? what is its orbital velocity in m /s?
Thursday, November 25, 2010 at 2:22pm

8th grade
draw a diagram showing the motion of a satellite around Earth. Draw the force vectors acting on the sattelite. Is the sattelite accelerating?
Wednesday, November 24, 2010 at 5:09pm

Physics
A satellite of mass 210 kg is launched from a site on Earth's equator into an orbit at 210 km above the surface of Earth. (a) Assuming a circular orbit, what is the orbital period of this satellite? (b) What is the satellite's speed in its orbit? (c) What is the ...
Wednesday, November 24, 2010 at 2:08pm

Physics
The average distance separating Earth and the Moon (center to center) is 384 000 km. Use the data in Table 7.3 to find the net gravitational force exerted by Earth and the Moon on a 3.00 multiplied by 104 kg spaceship located halfway between them (Earth mass kg: 5.98 x 10^24, ...
Wednesday, November 24, 2010 at 1:21pm

physics
A 33300 lb (earth weight) rocket in outer space has two constant forces acting upon it, F1 = (-166i + 392j) lb and F2 = (50i + -54j) lb. Its initial velocity is (39i + 64j) ft/s. How far is it from where it started after 33 seconds?
Tuesday, November 23, 2010 at 7:13pm

Physics
Earthquakes are essentially sound waves travelling through the earth. They are called seismic waves. Because the earth is solid, it can support both longitudinal and transverse sismic waves, which travel at different speeds. The speed of longitudinal waves, called P waves, is ...
Tuesday, November 23, 2010 at 4:46pm

physics
The period of a satellite is the primary way that the mass of planets is determined. The equation used for this calculation uses the fact that gravity of the planet provides the centripetal force to keep the satellite in orbit. The distance from the Earth to the Moon is 3.8 x ...
Tuesday, November 23, 2010 at 12:18pm

science
Which planet by itself contains the majority of mass of all the planets? saturn jupiter uranus venus earth
Tuesday, November 23, 2010 at 12:32am

geology
What is the minimum age of Earth. We are given a hint of: If the age of Earth were equal to one calendar year, the 1492 arrival of Christopher Columbus in America would have occurred at five seconds to midnight Dec. 31. That confuses me even more.
Monday, November 22, 2010 at 1:26pm

Physics
A laser beam is directed at the Moon, 380,000 km from Earth. The beam diverges at an angle of 4.6×10−5 rad. 1. What diameter spot will it make on the Moon?
Monday, November 22, 2010 at 12:20pm

Earth Science
Lower case letters that come after the capital letter(s), e.g., KJk, labeling a rock unit represent the rock unit's _
Sunday, November 21, 2010 at 8:23pm

earth
The Earth orbits the Sun once every 365 days. The distance between the Earth and the Sun is 1.5 x 1011 m. What is the average orbital velocity of the Earth as it travels around the Sun?
Sunday, November 21, 2010 at 8:10pm

PHYSICS
What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.
Sunday, November 21, 2010 at 5:59pm

PHYSICS
What is the reaction effect of the following action effects? a) Earth orbits the sun b) Ball accelerates downward Thank YOu.
Sunday, November 21, 2010 at 4:11pm

geology
How old are the oldest meteorites yet studied and what is the minimum age of Earth since Earth is at least as old as the meteorites. We know the oldest meteorites contain equal amounts of uranium 238 and lead 206. Uranium 238 has a half life of 4.5 billion years. Would that ...
Sunday, November 21, 2010 at 2:54pm

physic
The acceleration due to gravity of mars is 3.7 m/s2. An astronautto throw a tennis ball 70 m upward on mars. How high will he able to throw it on the earth?
Sunday, November 21, 2010 at 4:28am

physic
The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force SM that the sun exerts on the moon is perpendicular to the force EM that the earth exerts on the moon. The masses are: mass of sun = 1.99 1030 kg, mass of earth = 5.98 1024 kg, ...
Sunday, November 21, 2010 at 1:27am

physics
A football on the moon (1/6 earth's gravity) is kicked straight up with an initial velocity of +14.5 m/s. If it starts 2.7 m above the surface, how much time has passed until it is 16.8 m above the surface and on its way down?
Saturday, November 20, 2010 at 8:01pm

PHYSICS
Indentify the direction of the netforce in each of the following situations. A marble moves in a circular path inside a paper plate at a constant speed. The moon orbits the earth. An air hockey puck moves smoothly across the air hockey table after being struck. A rocket is ...
Saturday, November 20, 2010 at 6:57pm

Earth Science
What are the sequences of weather events a city goes through when an idealized, middle latitude,mature cyclone that hasn't developed an occluded front passes over it. Assume the center of the wave cyclone passes, west to east, at 150 to the north of the city.
Saturday, November 20, 2010 at 8:27am

physics
The earth orbits the sun once a year (3.16 107 s) in a nearly circular orbit radius 1.50 1011 m. With respect to the sun, determine the following. (a) the angular speed of the earth (b) the tangential speed of the earth (c) the magnitude and direction of the earth's ...
Friday, November 19, 2010 at 4:37pm

physics help
The earth orbits the sun once a year (3.16 10^7 s) in a nearly circular orbit radius 1.50 10^11 m. With respect to the sun, determine the following. (a) the angular speed of the earth 1 rad/s (b) the tangential speed of the earth 2 m/s (c) the magnitude and direction of the ...
Friday, November 19, 2010 at 3:59pm

College Physics
A 300 kg satellite is orbiting the earth with 20,352 km/h speed. Calculate the orbital radius in km. Assume G=7*(10^-11) N.m2/kg2 and Mass of earth = 6*(10^24) kg
Thursday, November 18, 2010 at 10:37pm

Physics
You weigh 585N on Earth, what is your mass? What do you weigh on the moon id g is 1.60m/s2
Thursday, November 18, 2010 at 4:31pm

Math
The earth's mass is 5.9763 X 10^27 (27th Power) . How much is it's mass in MG?
Thursday, November 18, 2010 at 1:51pm

English
A: What do you think of planting trees? 1. I think it is good for health. 2. I think we can live in better places because of the trees. 3. I think we need to plant more trees to live a healthy life. 4. I think we should try our best to preserve the earth as they do. 5. I think...
Thursday, November 18, 2010 at 4:09am

Chemistry
Why are the alkali and alkaline earth metals more reactive than other elements on the periodic table?
Wednesday, November 17, 2010 at 10:59pm

earth
which two rocks are primarily composed of a mineral that bubbles with acid?
Wednesday, November 17, 2010 at 5:36pm

Earth science
what are the causes of groundwater contamination? How can you stop the contamination?
Wednesday, November 17, 2010 at 3:26pm

Physics
A stationary 25kg object is located on a table near the surface of the earth. The coefficient of kinetic friction between the surface is 0.30. Determind the acceleratin of the object.
Wednesday, November 17, 2010 at 12:16pm

College Algebra
The population of the Earth is approximately 6 billion people and is growing at an annual rate of 1.9%. Assuming a Malthusian growth model, find the world population in 44 years.
Wednesday, November 17, 2010 at 1:01am

chemistry
Earth's population is about 6.5 billion. Suppose that every person on Earth participates in a process of counting identical particles at the rate of two particles per second. How many years would it take to count 6.0 x 10^23 particles? Assume that there are 365 days in a ...
Tuesday, November 16, 2010 at 11:37pm

Physics
Near the equator, the Earth's magnetic field point almost horizontally to the north and has a magnitude of B = 50 micro T. What should be the magnitude and direction for the velocity of an electron if its weight is to be exactly balanced by the magnetic force?
Tuesday, November 16, 2010 at 10:19pm

physics
In the latest Indian Jones film, Indy is supposed to throw a grenade from his car, which is going 79.0 km/h, to his enemy's car, which is going 102 km/h. The enemy's car is 14.3 m in front of the Indy's when he lets go of the grenade. If Indy throws the grenade so ...
Tuesday, November 16, 2010 at 12:29pm

English
i need an urgen help with my eulogy can someone please help me, please. i cant do some parts properly,and am not sure of some parts. so really need help. This is a hard moment. It’s the moment we must say farewell to the to the brave young man, Callum McGregor. He left ...
Tuesday, November 16, 2010 at 4:24am

Physics
Jill and her friends have built a small rocket that soon after lift-off reaches a speed of 900 m/s How high above the Earth can it rise? Ignore air friction. h=? m
Monday, November 15, 2010 at 3:50am

Physics
what propels a rocket away from the surface of the earth?
Sunday, November 14, 2010 at 11:33pm

physics
if you were stationary in space at the same distance from the sun as the eath is, how much force would the sun be exerting on you? what would be your acceleration towrd the sun? what would be the sun's acceleration toward you? okay so im a little confused where to go with ...
Sunday, November 14, 2010 at 11:07pm

physics
if earth is having one hole at one of the poles and also having another hole at other pole .if we drop a ball from one hole what will happen to that ball?
Sunday, November 14, 2010 at 9:24pm

space
gowing 10,00 miles per hour how long will it take to get to jupiter from earth with earth the sun and jupiter alined like a straight line or just an estimation
Sunday, November 14, 2010 at 7:42pm

space
traveling 10,000 miles per hour how long will it take to get to jupiter from earth
Sunday, November 14, 2010 at 7:30pm

Physics
A 67.0 kg base runner begins his slide into second base when moving at a speed of 3.5 m/s. The coefficient of friction between his clothes and Earth is 0.70. He slides so that his speed is zero just as he reaches the base. How much mechanical energy is lost due to friction ...
Sunday, November 14, 2010 at 8:39am

Earth CRYience
Assume a parcel of air on the surface with a temperature of 29 degrees Celsius with a relative humidity of 50%. If the parcel rises at what altitude should clouds form?
Friday, November 12, 2010 at 10:27pm

Physics
.) Beth launches a rocket out in the courtyard. It stays in the air for 7.25 seconds before coming back down. a.) How high did it get? b.) With what velocity did it hit the ground upon returning to Earth? c.) What is its rate of acceleration as it slows down, reaches the peak ...
Friday, November 12, 2010 at 1:30pm

phys
The space shuttle, with an initial mass M = 2.41E+6 kg, is launched from the surface of the earth with an initial net acceleration a = 26.1 m/s2. The rate of fuel consumption is R = 6.90E+3 kg/s. The shuttle reaches outer space with a velocity of vo = 4632 m/s, and a mass of ...
Thursday, November 11, 2010 at 8:44pm

Science
Which one is correct about Wien’s law for blackbody radiation? It gives the relationship between the maximum wavelength and intensity the temperature and intensity the range of wavelength and frequency the wavelength for its maximum intensity and temperature Based on Wien...
Thursday, November 11, 2010 at 8:04pm

physics
How would the use of dark matter affect the earth and universe? Explain possiblities
Thursday, November 11, 2010 at 3:48pm

earth science
I need to draw a diagram showing delta, oxalate, tributary and meander. I also need to draw a diagram showing water table, zone of saturation, cone of depression, working well, dry well, aquitard, aquifer, spring, perched water
Thursday, November 11, 2010 at 3:12pm

Earth Science
what is the dewpoint temperature of a kilogram of air when a psychrometer measures an 8 degree Celsius dry-bulb temperature and a 6 degree Celsius wet-bulb reading?
Thursday, November 11, 2010 at 8:56am

Physics
You have probably seen films of astronauts floating weightless in orbiting satellites. People often get the idea that the astronauts are weightless because they are so far from the gravity of the earth. Let us see if that explanation is correct. Typically, such satellites ...
Wednesday, November 10, 2010 at 11:33pm

phy
A pendulum has a period of 0.75 s on Earth. What is its period on a planet where the acceleration of gravity is about 0.41 that on Earth?
Wednesday, November 10, 2010 at 8:31pm

PHYSICS
a 0.1 kg mass is suspended at rest from a spring near the Earth's surface, the distance that the spring is stretched is measured to be 1.0 cm. What is the spring constant of the spring (remember the MKS units)? A mass of 2 kg is attached to a spring with constant 18 N/m. ...
Wednesday, November 10, 2010 at 9:31am

physics
a 0.1 kg mass is suspended at rest from a spring near the Earth's surface, the distance that the spring is stretched is measured to be 1.0 cm. What is the spring constant of the spring (remember the MKS units)? A mass of 2 kg is attached to a spring with constant 18 N/m. ...
Wednesday, November 10, 2010 at 1:02am

algebra
earth tothe sun is 93000000 how many of you stacked on top of yourself would it take to reach the sun
Tuesday, November 9, 2010 at 9:35pm

science
Words to use: Accelerate - Sliding - Brake - Friction - Slipping - Inertia Velocity - Wheel - Strength - Static - Terminal velocity Questions 1. An object will ____?____ when the net force is not zero. 2. ____?____ will never speed up an object. 3. The friction that prevents ...
Tuesday, November 9, 2010 at 8:01pm

Science
The gravitational force of any object near Earth is _____? A unknown B friction C Newton's First Law D 9,8m/s2 When you walk across a bridge, the _____ force of the bridge keeps it from breaking. A gravitational B normal C strong D weak A (n) _______________ helps reduce ...
Tuesday, November 9, 2010 at 6:55pm

calculus
(1 pt) The acceleration due to gravity, g, is given by g = (G*M)/(r^2) where M is the mass of the Earth, r is the distance from the center of the Earth, and G is the uniform gravitational constant. (a) Suppose that we change from our distance from the center of the Earth by a ...
Tuesday, November 9, 2010 at 2:05pm

Physics
A space vehicle is traveling at 5260 km/h relative to Earth when the exhausted rocket motor is disengaged and sent backward with a speed of 89 km/h relative to the command module. The mass of the motor is four times the mass of the module. What is the speed (in km/h) of the ...
Tuesday, November 9, 2010 at 11:58am

help physics
the earth (mass=5.98x10^24kg) rotates around the sun in a orbit that is approximately circular, with a radius of 1.5x10^11m find the orbital speed of the earth around the sun
Monday, November 8, 2010 at 10:55pm

physics
the earth (mass=5.98x10^24kg) rotates around the sun in a orbit that is approximately circular, with a radius of 1.5x10^11m find the orbital speed of the earth around the sun
Monday, November 8, 2010 at 10:46pm

Physics earth & Space
toward what direction, north or south would you look to the sun at noon on june 21-22 if you lived at the following latitudes
Monday, November 8, 2010 at 8:12pm

physics
If a 0.1 kg mass is suspended at rest from a spring near the Earth's surface, the distance that the spring is stretched is measured to be 1.0 cm. What is the spring constant of the spring (remember the MKS units)? A mass of 2 kg is attached to a spring with constant 18 N/...
Monday, November 8, 2010 at 5:34pm

physics
You have probably seen films of astronauts floating weightless in orbiting satellites. People often get the idea that the astronauts are weightless because they are so far from the gravity of the earth. Let us see if that explanation is correct. Typically, such satellites ...
Monday, November 8, 2010 at 5:11pm

physics
A space habitat for a long space voyage consists of two cabins each connected by a cable to a central hub as shown in the figure below. The cabins are set spinning around the hub axis, which is connected to the rest of the spacecraft to generate artificial gravity. (a) What ...
Monday, November 8, 2010 at 3:24pm

11th grade physics
how high above the surface of the Earth would an object need to be for its weight to be half its weight on the surface?
Monday, November 8, 2010 at 1:09pm

physics
how high above the surface of the Earth would an object need to be for its weight to be half its weight on the surface?
Monday, November 8, 2010 at 1:09pm

physics
how high above the surface of the Earth would an object need to be for its weight to be half its weight on the surface?
Monday, November 8, 2010 at 1:07pm

english
Help Understanding A journey to the center of the earth by: Jules Verne. 1.)What problems do each of the 3 characters face within themselves, and how do they end up resolving each of there problems? 2.)What are 4 of the most important occurences in the book that really make a ...
Monday, November 8, 2010 at 12:21am

physics
Using Kepler's constant (9.84 X 10^-14), calculate the orbital radius of an artificial satellite whose period of revolution around the Earth is 1.43 X 10^4s(3.64 h).
Sunday, November 7, 2010 at 9:41pm

physics
A 2.99 kg ball is dropped from the roof of a building 161.9 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 12.3 N on the ball. How long does it take to hit the ground> The acceleration of gravity is 9.81 m/s2. Answer the units in s...
Sunday, November 7, 2010 at 8:50pm

physics
A loaf of bread weighs 3.9 N on earth. What should it weigh, in newtons, on the moon, where the acceleration due to gravity is one-sixth that on Earth?
Sunday, November 7, 2010 at 6:49pm

physics
An astronaut on the Moon fires a projectile from a launcher on a level surface so as to get the maximum range. If the launcher gives the projectile a muzzle velocity of 23 m/s, what is the range of the projectile? [Hint: The acceleration due to gravity on the Moon is only one...
Sunday, November 7, 2010 at 5:04pm

science
where on earth is silver found? Thanks!
Sunday, November 7, 2010 at 8:04am

people
1. Many people know that the weight of an object varies on different planets, but did you know that the weight of an object on Earth also varies according to the elevation of the object? In particular, the weight of an object follows this equation: , where C is a constant, and...
Saturday, November 6, 2010 at 11:21pm

physics
A 4.05 kg ball is dropped from the roof of a building 171.4 m high. While the ball is falling to Earth, a horizontal wind exerts a constant force of 12.5 N on the ball. How long does it take to hit the ground? The acceleration of gravity is 9.81 m/s^2.
Saturday, November 6, 2010 at 6:41pm

gravity
A spaceship is launched from the Earth's surface with a speed v. The radius of the Earth is R. What will its speed be when it is very far from the Earth? (Use any variable or symbol stated above along with the following as necessary: G for the gravitational constant, m for...
Friday, November 5, 2010 at 10:36pm

Physics
The first stage of a space vehicle consumed fuel and oxidizer at the rate of 1.65 104 kg/s with an exhaust speed of 2.55 103 m/s. (a) Calculate the thrust produced by this engine. (b) Find the acceleration the vehicle had just as it lifted off the launch pad on the Earth, ...
Friday, November 5, 2010 at 9:31pm

Calculus
for population in billions, where t is years since 1990: N(t) = 41/1+11 e^−0.1 t (b) According to this model, when will the earth's population reach 20.5 billion? During the year . How about 40.9 billion? During the year .
Friday, November 5, 2010 at 12:17am

Physics
A man weighs 1220 N on Earth. What would he weigh on Jupiter, where the free-fall acceleration is 25.9 m/s2? The acceleration of gravity is 9.8 m/s2 . Answer in units of N.
Thursday, November 4, 2010 at 9:21pm

Physics
Gravity on the surface of the moon is only 1 as strong as gravity on the Earth. 6 What is the weight of a 30 kg object on the Earth? The acceleration of gravity is 10 m/s2 . Answer in units of N.
Thursday, November 4, 2010 at 9:17pm

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 33 kg object on the Earth? The acceleration of gravity is 10m/s2 . Answer in units of N.
Thursday, November 4, 2010 at 9:01pm

Pearson
Calculate the acceleration due to the rotation of the Earth of a person in a location 22° northern geographical latitude. Use R Earth = 3,680 km for the value of the radius of the Earth.
Thursday, November 4, 2010 at 8:51pm

physics
Calculate the acceleration due to the rotation of the Earth of a person in a location 48° northern geographical latitude. Use REarth = 3,678 km for the value of the radius of the Earth.
Thursday, November 4, 2010 at 8:26pm

Earth Science
What are the effects radiation has on the heating of land and water? Thank You.
Thursday, November 4, 2010 at 8:05pm

Physics
A spaceship is launched from the Earth's surface with a speed v. The radius of the Earth is R. What will its speed be when it is very far from the Earth? (Use any variable or symbol stated above along with the following as necessary: G for the gravitational constant, m for...
Thursday, November 4, 2010 at 7:11pm

Earth Science
What are the primary heat absorbing gases in the atmosphere? What wavelength of radiation do they absorb?
Thursday, November 4, 2010 at 6:01pm

physics
What is the magnitude of the apparent weight of a 79 astronaut 5200 from the center of the Earth's Moon in a space vehicle moving at constant velocity?
Thursday, November 4, 2010 at 2:14am

English
I have to list the verb or verbs. Could someone please check. 1. The plant Venus seems more like Earth in appearance than any other planet does. seems like
Wednesday, November 3, 2010 at 5:09pm

Physics
If a 1-kg mass fell toward Earth from a large distance where it had zero relative velocity, what would be the velocity at the Earth's surface?
Wednesday, November 3, 2010 at 12:06pm

math
The earth has a radius of 6,380 km. The formula for the volume of a sphere is �� V = 4/3 ðx^3, and the formula for surface area of a sphere is A = 4ðx^2 . Find the volume and surface area of the earth and write the answer in scientific notation with two ...
Wednesday, November 3, 2010 at 11:08am

physics
Find the angular speed of the Earth as it spins about its axis. Give your result in rad/ses
Tuesday, November 2, 2010 at 9:56pm

physics
a body is thrown downward with an initial speed of 20.0 m/s on earth. what is the acceleration of the object
Tuesday, November 2, 2010 at 10:32am

space
How many Earth Diameters would it take to reach the Sun 93,000,000 miles away?
Tuesday, November 2, 2010 at 12:10am

english
1 Sentence thesis on Jules Verne "A journey to the center of the earth"?
Monday, November 1, 2010 at 8:29pm

PHYSICS
Two satellites A and B are in different circular orbits about the earth. The orbit speed of satellite A is three times that of satellite B. Find the ratio (TA/TB) of the periods of the satellite.
Monday, November 1, 2010 at 8:03pm

physics
A satellite orbits Earth at a distance of 3rearth above Earth's surface. (Earth mass equals 5.97 X 10^24, earths equatorial radius equals 6.38 X 10^6) What is the magnitude of the gravitational acceleration of the satellite?
Monday, November 1, 2010 at 6:42pm

Physics
A satellite orbits Earth at a distance of 3rearth above Earth's surface. (Earth mass equals 5.97 X 10^24, earths equatorial radius equals 6.38 X 10^6) How many Earth radii is the satellite form Earths center?
Monday, November 1, 2010 at 6:36pm

Physics 11
How much would a 80kg astronaut weigh on Earth? How much would they weigh 500 km above the surface of the Earth? Thank you!
Monday, November 1, 2010 at 5:49pm

Physics
1. Gunter, the weightlifter, can lift a 230.0 kg barbell overhead on Earth. The acceleration due to gravity on the sun is 274 m/s2. 2. a. Would the barbells be heavier on the sun or on the Earth. heavier on the sun b. How much (in Newtons) would the barbells weigh on the sun...
Monday, November 1, 2010 at 4:33pm

college
A spaceship lands on the planet whose radius is 5 times that of planet earth and whose mass is 25 times that of planet earth. Find the apparent weight of the astronaut on the second planet if the astronaut weighs 150lbs on planet earth
Monday, November 1, 2010 at 12:52pm

Global science
Exponential growth is stopped when______equals. there are no choices and I don't hve an answer. I am learning about Growth and population.My science book is called Global science Earth/ environmental systems science by Kendall Hunt publishing company. It is the seventh ...
Monday, November 1, 2010 at 12:26pm

Physics
Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.
Sunday, October 31, 2010 at 10:14pm

Physics
A block with mass m = 2.00kg is placed against a spring on a frictionless incline with angle (30 degrees). (The block is not attached to the spring.) The spring with spring constant k = 19.6 N/cm, is compressed 20.0 cm and then released. a.) What is the elastic potential ...
Sunday, October 31, 2010 at 8:24pm

physics
Calculate the mass of the Earth, if it had a radius of 3000 km and a gravity of 6 m/s^2.
Sunday, October 31, 2010 at 3:37pm

College Physics
A block with mass m = 2.00kg is placed against a spring on a frictionless incline with angle (30 degrees). (The block is not attached to the spring.) The spring with spring constant k = 19.6 N/cm, is compressed 20.0 cm and then released. a.) What is the elastic potential ...
Sunday, October 31, 2010 at 1:53pm

Earth Science
If the date was March 22 and one saw the noon sun at 35 degrees south above the horizon, what latitude is one at?
Saturday, October 30, 2010 at 5:51pm

Earth Science
What are the minimum and maximum durations of daylight at a latitude of 39 degrees north? Thanks.
Saturday, October 30, 2010 at 5:27pm

Physics
The Earth's magnetic field above the Earth's equator is about 10^-4 north. If a proton is intially moving downward at 5*10^5 m/s, it will? A. curve east, making a circle with r= 50 m. B. curve west, making a circle with r=50 cm C. curve east, making a circle with r= 3 ...
Saturday, October 30, 2010 at 3:23pm

Physics
Which way does the magnetic vector B point in the vicinity of the Earth's North Pole? A. Upward B Downward C. Horizontally D. THere is no magnetic field at the North Pole
Saturday, October 30, 2010 at 3:19pm

Earth Science
What causes the intensity and duration of solar radiation received at any place to vary throughout the year?
Saturday, October 30, 2010 at 8:53am

Earth Science
Please determine the noon sun angle at the given latitudes on April 11: 40 degrees north 0 degrees
Friday, October 29, 2010 at 10:37pm

Earth Science
How many hours of daylight occur at the following locations on the specified dates? March 22 ---------------- 40 degrees north 0 degrees 90 degrees south December 22 ---------------- 40 degrees north 0 degrees 90 degrees south
Friday, October 29, 2010 at 10:35pm

Earth Science
During June 21-22, determine the length of daylight at the following latitudes. Any help is greatly appreciated. latitudes --------------- 70 degrees north 40 degrees south 40 degrees north 90 degrees south 0 degrees
Friday, October 29, 2010 at 10:31pm

physics
What is the magnitude of the apparent weight of a 69 kg astronaut 5200 km from the center of the Earth's Moon in a space vehicle moving at constant velocity?
Friday, October 29, 2010 at 2:23pm

PHYSICS
Calculate the radial acceleration of an object on the ground at the earth's equator in m/s2, turning with the planet.
Friday, October 29, 2010 at 2:01pm

AP physics
suppose that the surface (radius=r) of the space station is rotating at 35.8 m/s. what must be the value of r for the astronauts to weigh one-half their earth weight?
Friday, October 29, 2010 at 9:22am

Physics
Calculate the earth's orbital angular speed in radians/sec due to its motion around th sun.
Friday, October 29, 2010 at 7:14am

Physics
How long would it take for the Earth to complete a full turn if a person at 32.6° northern geographical latitude floats apparently weightlessly across the room? Use REarth = 6,384 km for the radius of Earth.
Thursday, October 28, 2010 at 11:22pm

Physics
Calculate the force of gravity on a spacecraft 19200 km (3 earth radii) above the Earth's surface if its mass is 1600 kg. I know that 1/16 of Fg is the answer but I can't seem to find out what the Fg is.
Thursday, October 28, 2010 at 10:54pm

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