Tuesday
May 21, 2013

# Homework Help: Science: Earth

Math
Radius of earth 3,959 miles Space shuttle orbits 200 miles above earths Surface Space shuttle completes 220 degrees of a Revolution around earth in one day What is the average speed of the space Shuttle
Sunday, October 21, 2012 at 4:52pm

Physics
The gravitational field strenght on the moon is 1.63N/kg. If a rock on the moon weights 2000N, how much does the same rock weigh on the earth?
Sunday, October 21, 2012 at 1:19pm

Physics
On earth, two parts of a space probe weigh 18300 N and 4440 N. These parts are separated by a center-to-center distance of 5.11 m and may be treated as uniform spherical objects. Find the magnitude of the gravitational force that each part exerts on the other out in space, far...
Friday, October 19, 2012 at 5:00pm

English
Did I do these correctly? Read the following passage and write a brief paragraph that identifies: a) the subject of the passage b) the author's purpose for writing c) the intended audience d) the tone of the piece, and e) the perspective or point of view. Be sure that your...
Friday, October 19, 2012 at 1:43pm

According to science, the fastest speed possible for anything is the speed of light. The speed of light is about 186,000 miles per second. That means that in one minute, light travels 11,160,000 miles. The star nearest Earth is the Sun. It's about 93,000,000 miles from ...
Friday, October 19, 2012 at 7:17am

Physics
Calculate a space shuttle territory 250 km above Earth's surface. Earth's mass is 6.0 * 10^24kg and its radius is 6.38 * 10^6 m (6380km)
Thursday, October 18, 2012 at 12:57pm

math
John has traveled from a distant planet to spend one earth year visiting with us. However, one year on earth is not the same as one year on john's planet. on john's planet: 10 seconds = 1 minute 10 minutes = 1 hour 10 hours = 1 day 10 days = 1 week 10 weeks = 1 month ...
Thursday, October 18, 2012 at 11:23am

Mathbio in 12th science
2)a stone of mass 1kg tied to one end of a string of length 1m whirld in a horizontal circle with a costant speed 2 radian/second tension of the string is. A)0.5n b)1n c)2n d)4n 3)the orbital velocity of a satelight close to the earth is v then the orbital velocity at a height...
Thursday, October 18, 2012 at 12:51am

1. Venus's surface temperature is ____ than Earth's surface temperature. cooler much cooler hotter none of these isn't the answer hotter because Venus has a denser atmosphere, so the temperature would be higher?
Wednesday, October 17, 2012 at 11:28pm

7th grade science help the solar system Ms. Sue
1. Most likely, ____ were formed when lava from the moon's interior flooded bowl-like regions on the moon's surface. (1 point) maria highlands craters basins 2. Depressions on the moon formed by large meteorites are called ____. (1 point) maria mountains craters ...
Wednesday, October 17, 2012 at 10:49pm

Science
humans,other mammals,birds can maintain a constant body temperature. why is this a useful adaptation? how does this explain the spread of these animals around earth?
Wednesday, October 17, 2012 at 10:43pm

science
where does the earth loose energy to ??
Wednesday, October 17, 2012 at 10:28pm

PHYSICS
A long-straight wire carries a current and is aligned with the North-South direction. You place a compass 4 cm directly above the wire and above the North/East/South/West plane. The compass needle, which initially pointed North (far away from the wire) is now deflected by 20o ...
Wednesday, October 17, 2012 at 3:36pm

Science
19. Which of the following base unit definitions was changed from being based on an arc of the earth to a time interval of light? second kilogram meter candela
Wednesday, October 17, 2012 at 7:43am

physics
a teniss ball thrown vertically upward reaches a maximun height of 33 meters above the surface of earth. at its maximun height the speed of he tennis ball is
Tuesday, October 16, 2012 at 7:00pm

Physics
An asteroid with mass m = 1.85*10^9 kg comes from deep space, effectively from infinity, and falls toward Earth. How much work would have to be done on the asteroid by friction to slow it to 550 m/s by the time it reached a distance of 1.50*10^8 m from Earth?
Tuesday, October 16, 2012 at 6:34pm

Physics
If an artificial earth satellite is in an orbit around the earth’s equator with a period of exactly 1 day, how does its motion look to an observer on the rotating earth if it orbits in the same direction as the earth turns? (Such an orbit is said to be geosynchronous; ...
Tuesday, October 16, 2012 at 2:36pm

algebra
Write a formula that relates temperature t in degrees Fahrenheit at altitude h (in thousands of feet) and a ground temperature of 65ºF. State any restrictions on h. b. Find the temperature at 11,000 ft above Earth’s surface.
Tuesday, October 16, 2012 at 11:52am

Physics HELP!!
What is the acceleration due to gravity at 7220km above the Earth's surface? Take the radius of the Earth to be 6.37e6m and the mass of the Earth to be 5.972e24kg.
Tuesday, October 16, 2012 at 11:22am

physics
3. A satellite of mass 500 kg orbits the Earth with a period of 6000 s. The Earth has a mass of 5.98 x 1024 kg. (a) Calculate the magnitude of the Earth's gravitational force on the satellite. (b) Determine the altitude of the satellite above the Earth's surface.
Monday, October 15, 2012 at 8:46pm

physics
what is a satellite's altitude above the surface of the earth if earth's mass is 5.98*10^24 kg and its radius is 6380 km?
Monday, October 15, 2012 at 8:14pm

earth
The global-mean surface temperature of the earth is about 288 degrees Kelvin. Use the Stefan-Boltzman law to calculate the radiative flux corresponding to an object with this temperature. [hint: use σT4 with σ = 5.67x10-8 Wm-2K-4 ]
Monday, October 15, 2012 at 3:09pm

Science
If Sam weigs 114kg on earth what is his mass on the moon
Monday, October 15, 2012 at 6:42am

Science
If Sam weights 114kg on earth what is his mass on the moon
Monday, October 15, 2012 at 6:32am

College Chem
The density of the Earth is about 3.5g/cubic centimeters. If the Earth has a radius of 1.126 by 10 (to the seventh power) meters, what is its mass? (hint: volume= 4(pie)r(to the third power)/3; 1 meter=100 centimeters
Sunday, October 14, 2012 at 10:32pm

AP Physics B
A 1010 kg geosynchronous satellite orbits a planet similar to Earth at a radius 1.97 × 105 km from the planet’s center. Its angular speed at this radius is the same as the rotational speed of the Earth, and so they appear stationary in the sky. That is, the period ...
Sunday, October 14, 2012 at 7:30pm

physics
At the surface of a certain planet, the gravitational acceleration has a magnitude of 15.0 . A 28.0- brass ball is transported to this planetWhat is the mass of the brass ball on the Earth and on the planet
Sunday, October 14, 2012 at 11:05am

Physics
When a spacecraft travels from the Earth to the Moon, both the Earth and the Moon exert a gravitational force on the spacecraft. Eventually, the spacecraft reaches a point where the Moon's gravitational attraction overcomes the Earth's gravity. How far from the Earth&#...
Saturday, October 13, 2012 at 4:00pm

physics
A mass of 2.6 kg lies on a frictionless table, pulled by another mass of 4.7 kg under the influence of Earth’s gravity. The acceleration of gravity is 9.8 m/s2 .If the acceleration of the object has a magni- tude of 3.5 m/s2, what is the angle θ between the two ...
Friday, October 12, 2012 at 3:48pm

physics
what device could use th earth's magnetic felds to produce energy and how it would work?
Friday, October 12, 2012 at 3:07pm

physics
why one cannot find the north pole of the earth using only a simple compass
Friday, October 12, 2012 at 3:04pm

Physics
Which direction (Eastwards or Westwards) in the sky would the Sun appear to move as seen by a stationary observer on the surface of the hypothetical planet that has a sidereal rotation (on its axis) period of 120 days, and a revolution (around the Sun) period of 40 days, where...
Friday, October 12, 2012 at 12:41pm

physics
The satellite is in a circular orbit 400 km above the Earth's surface, where the free-fall acceleration is 8.71 m/s2. The radius of the Earth is 6400 km. Determine the speed of the satellite.
Friday, October 12, 2012 at 12:29pm

science
Why does the sun and moon appear to be the same size when viewed from earth.My answer is because the sun is bigger than the moon. Am I correct
Thursday, October 11, 2012 at 10:02pm

physics
Prove that for an earth satellite,the ratio of its velocity at apogee to its velocity at perigee is the inverse ratio of its distances from apogee and perigee.
Thursday, October 11, 2012 at 12:31pm

physcis
A 100.0 kg base runner begins his slide into second base when he is moving at a speed of 4.70 m/s. The coefficient of friction between his clothes and Earth is 0.550. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to...
Wednesday, October 10, 2012 at 8:40pm

P
Calculate the magnitude of the gravitational force exerted on a 1,405-kg satellite that is a distance of two earth radii from the center of the earth.
Wednesday, October 10, 2012 at 2:51pm

Physics
In tests on earth a lunar surface exploration vehicle (mass = 5.90 103 kg) achieves a forward acceleration of 0.215 m/s2. To achieve this same acceleration on the moon, the vehicle's engines must produce a drive force of 1.64 103 N. What is the magnitude of the frictional ...
Wednesday, October 10, 2012 at 2:11pm

earth science
according to the condensation theory the most important factor for the formation of our planet was
Wednesday, October 10, 2012 at 1:09pm

Astronomy
A polar satellite, in a low Earth orbit passing over both poles, makes 16 orbits each day. Viewed from Earth, how far apart in longitude are its consecutive passes over the equator?
Wednesday, October 10, 2012 at 12:56pm

earth science
Astonomers think planets formed from interstellar dust and gases that clumped together in a process called
Wednesday, October 10, 2012 at 11:43am

Chemistry
Most of the earth is made of what? Is it helium?
Tuesday, October 9, 2012 at 11:58pm

A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to ...
Tuesday, October 9, 2012 at 11:26am

A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to ...
Monday, October 8, 2012 at 9:40pm

physics
A satellite circles the earth in an orbit whose radius is 2.01 times the earth's radius. The earth's mass is 5.98 x 1024 kg, and its radius is 6.38 x 106 m. What is the period of the satellite?
Monday, October 8, 2012 at 6:25pm

Physics
A ferry is crossing a river. The ferry is headed due north with a speed of 1.7 m/s relative to the water and the river’s velocity is 2.4 m/s to the east. a) What is magnitude of the boat’s velocity relative to Earth? Answer in units of m/s b) Find the direction in ...
Monday, October 8, 2012 at 10:16am

Science
How many minutes are required for a radio signal to travel from Earth to a space station on Mars if Mare is 7.83 x 10 to the 7th power km?
Monday, October 8, 2012 at 2:03am

Science
How much time is required for reflected sunlight to travel from the Moon to Earth if the distance between Earth and the Moon is 3.85 x 10 to the 5th exponent?
Monday, October 8, 2012 at 1:58am

physics
Consider the Earth and a cloud layer 600 m above the planet to be the plates of a parallel-plate capacitor. (a) If the cloud layer has an area of 2.0 km2 = 2000000 m2, what is the capacitance?
Sunday, October 7, 2012 at 10:38pm

Physics
A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to ...
Sunday, October 7, 2012 at 8:30pm

Physics HELP!
A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to ...
Sunday, October 7, 2012 at 7:24pm

Physics URGENT!!!
A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to ...
Sunday, October 7, 2012 at 2:51pm

Physics
A satellite is in a circular orbit about the earth (ME = 5.98 1024 kg). The period of the satellite is 3.70 104 s. What is the speed at which the satellite travels?
Saturday, October 6, 2012 at 11:20pm

Physics (Kinematics)
A ball is thrown 83.3 m upward and then falls back to earth.Neglecting air resistance, how long will it be in the air? The acceleration of gravity is 9.8 m/s2 . Answer in units of s
Saturday, October 6, 2012 at 2:32am

Physics HELP!
A 85.0 kg base runner begins his slide into second base when he is moving at a speed of 2.10 m/s. The coefficient of friction between his clothes and Earth is 0.570. He slides so that his speed is zero just as he reaches the base. (a) How much mechanical energy is lost due to ...
Friday, October 5, 2012 at 11:24pm

I did this for chemistry. Are the examples and grammer correct? THANK YOU SO MUCH TO WHOEVER ACTUALLY TAKES THE TIME TO READ THIS I LOVE YOU OMG. Naming Chemical Compounds By: Bryce R The periodic table is made up of the most simplest and complex elements. These elements ...
Thursday, October 4, 2012 at 10:45pm

physics
What is the speed of a satellite in a geosynchronous orbit about Earth?
Thursday, October 4, 2012 at 10:21pm

physics
You are an astronaut (m = 90 kg) and travel to a planet that is the same mass and size as Earth, but it has a rotational period of only 15 h. What is your apparent weight at the equator of this planet?
Thursday, October 4, 2012 at 10:18pm

physics
When a spacecraft travels from Earth to the Moon, the gravitational force from Earth initially opposes this journey. Eventually, the spacecraft reaches a point where the Moon's gravitational attraction overcomes the Earth's gravity. How far from Earth must the ...
Thursday, October 4, 2012 at 10:17pm

Physics
A helicopter is ascending vertically with a speed of 5.20 m/s. At a height of 125 m above the Earth, a package is dropped from a window. How much time does it takes the package to hit the ground? [Hint: The package's initial speed equals the helicopter's]
Thursday, October 4, 2012 at 9:34pm

Free Fall
The acceleration due to gravity on planet X is one fifth that on the surface of the earth. If it takes 3.9 s for an object to fall a certain distance from rest on earth, how long would it take to fall the same distance on planet X?
Thursday, October 4, 2012 at 7:09pm

physics
Which of the following correctly describe the gravitational attraction between Earth and the Moon? -The Earth and the Moon exert equal size gravitational forces on each other. -The gravitational force of the Moon on the Earth is towards the Moon. -Both the Earth and the Moon ...
Thursday, October 4, 2012 at 7:05pm

science
On Earth, the ratio of the force (newtons) to the mass (kilograms) of an object is always the same
Thursday, October 4, 2012 at 6:52pm

social studies
How much of the earth's surface is water?
Thursday, October 4, 2012 at 5:52pm

Earth Science
Renewable resources can be replaced as fast as they are consumed? It is true or false?
Thursday, October 4, 2012 at 12:49pm

Physics 1
Find the ratio of your weight on the Earth to your weight on the surface of the Earth's Moon. WEarth/WEarth's Moon=
Thursday, October 4, 2012 at 11:18am

physics
A space traveler weighs 635 N on earth. What will the traveler weigh on another planet whose radius is three times that of earth and whose mass is twice that of earth?
Thursday, October 4, 2012 at 1:03am

Physics
(a) Calculate the magnitude of the gravitational force exerted on a 488-kg satellite that is a distance of 1.95 times earth radii from the center of the earth. (b) What is the magnitude of the gravitational force exerted on the earth by the satellite? (c) Determine the ...
Thursday, October 4, 2012 at 12:58am

Physics
In tests on earth a lunar surface exploration vehicle (mass = 5.90 103 kg) achieves a forward acceleration of 0.215 m/s2. To achieve this same acceleration on the moon, the vehicle's engines must produce a drive force of 1.64 103 N. What is the magnitude of the frictional ...
Thursday, October 4, 2012 at 12:49am

physics
A 5.9-kg rock and a 3.0 10-4-kg pebble are held near the surface of the earth. (a) Determine the magnitude of the gravitational force exerted on each by the earth.(b) Calculate the magnitude of the acceleration of each object when released.
Wednesday, October 3, 2012 at 11:42pm

physics
The Hubble Space Telescope orbits Earth 621 km above Earth's surface. What is the period of the telescope's orbit? Give answer with 5 significant figures.
Wednesday, October 3, 2012 at 10:24pm

Physics 1
Find the ratio of your weight on the Earth to your weight on the surface of the Earth's Moon. WEarth/WEarth's Moon=
Wednesday, October 3, 2012 at 9:50pm

science
how many days would it take to fly to Jupiter (from Earth) in a space shuttle at 45,000 miles per hour? The minimum distance between the Earth and Jupiter is 365 million miles.
Wednesday, October 3, 2012 at 9:44pm

science
how many days would it take to drive from the earth to the moon at a speed of 75 miles per hour? the average distance from the earth to the moon is 380,000km. 1 km=0.62 miles
Wednesday, October 3, 2012 at 9:42pm

physics
what is the acceleration due to gravity at a distance of 2 earth radii abouve earths surface?
Wednesday, October 3, 2012 at 6:06pm

Physics
Two satellites, A and B, are in different circular orbits about the earth. The orbital speed of satellite A is thirty-five times that of satellite B. Find the ratio (TA/TB) of the periods of the satellites.
Tuesday, October 2, 2012 at 5:43pm

science
The earth has a magnetic north and south. How does this help up with evidence to support the theory of Continental Drift?
Tuesday, October 2, 2012 at 3:01pm

PHYSICS
A projectile is fired from the surface of the Earth with a speed of 150 meters per second at an angle of 45 degrees above the horizontal. If the ground is level, what is the maximum height reached by the projectile?
Monday, October 1, 2012 at 6:03pm

AP PYHSICS
A projectile is fired from the surface of the Earth with a speed of 150 meters per second at an angle of 45 degrees above the horizontal. If the ground is level, what is the maximum height reached by the projectile?
Monday, October 1, 2012 at 6:02pm

Earth Science
How energy flows through the Earth's system?
Monday, October 1, 2012 at 11:56am

Physics
An airplane flies 340 km due east, makes a right-angle turn, and then flies 390 km due north. Find the magnitude of the plane’s displace- ment from its starting point. Neglect the curvature of the earth. Answer in units of km
Sunday, September 30, 2012 at 8:06pm

physics
According to Kepler's third law, the orbital period T of a planet is related to the radius R of its orbit by T2 R3. A planet's orbit is larger than Earth's by a factor if 3.39. What is the planet's orbital period?
Sunday, September 30, 2012 at 3:59pm

Earth Science
How energy flows through the Earth's system.
Sunday, September 30, 2012 at 1:11pm

earth science
How do astronomers use satellites?
Sunday, September 30, 2012 at 12:29pm

eath science
is moon a source of earth's energy?
Sunday, September 30, 2012 at 11:10am

physics
Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . When a horizontal force of 340 is applied to a 68.0 box, the box slides on a level floor, opposed by a force of kinetic friction of 150 . Part A What is the magnitude of the ...
Saturday, September 29, 2012 at 8:32pm

physics
A 125 object is taken to a height of 210 above the Earth's surface. Part A What is the object's mass at this height? Part B What is the object's weight at this height?
Saturday, September 29, 2012 at 8:31pm

physics
Unless otherwise stated, all objects are located near the Earth's surface, where = 9.8 . A hockey puck with a weight of 0.80 is sliding freely across a section of very smooth (frictionless) horizontal ice. Part A When it is sliding freely, how does the upward force of the ...
Saturday, September 29, 2012 at 8:29pm

physics
Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . A block of mass 23.0 slides down a frictionless surface inclined at 35. Part A To ensure that the block does not accelerate, what is the magnitude of the smallest force that you must ...
Saturday, September 29, 2012 at 8:26pm

physics
Unless otherwise stated, all objects are located near the Earth's surface, where = 9.80 . A 3000 truck tows a 1500 car by a chain. Part A If the net forward force on the truck by the ground is 3500 , what is the acceleration of the car? Part B What is the tension in the ...
Saturday, September 29, 2012 at 8:14pm

Earth Science
Two different areas of the United States receive the same amount of rainfall during a day. Area A has soil that contains many large pores and rocks made of sandstone. The soil in Area B is mainly heavy clay. Area A is a desert. Area B is a swamp. For each area (Area A and Area...
Saturday, September 29, 2012 at 12:43pm

Physics
A spy satellite is in circular orbit around Earth. It makes one revolution in 6.01 hours. (a) How high above Earth's surface is the satellite? [Answer in Km] (b) What is the satellite's acceleration? [Answer in m/s^2] I see this posted over and over again and I have ...
Saturday, September 29, 2012 at 2:00am

Explain the quote by Samuel de Champlain in your own words. "Through (exploration) we gain knowledge of different countries, regions and kingdoms; through it we attract and bring into our countries all kinds of riches; through it... Christianity (is spread)in all parts ...
Friday, September 28, 2012 at 6:03pm

Earth Science
Does energy flows through the Earth's system by heat?
Friday, September 28, 2012 at 11:55am

Earth Science
Can someone five me an example of how carbon cycles through the Earth's system?
Friday, September 28, 2012 at 11:46am

physics
Calculate the velocity needed for an object starting at the Earth's surface to just barely reach a satellite in a geosynchronous orbit. Ignore air drag and assume the object has a speed of zero when it reaches the satellite. (The orbital radius of a satellite in a ...
Thursday, September 27, 2012 at 1:19pm

Math/Trig
An airplane leaves an airport and flies due west 150 miles and then 170 miles in the direction 210°50'. Assuming the Earth is flat, how far is the plane from the airport at this time (to the nearest mile)
Thursday, September 27, 2012 at 10:15am

earth Geology
This is just a question that I was curious about, why do mountain belts run parallel to coastlines? Thanks
Wednesday, September 26, 2012 at 11:03pm

phy101
Calculate the velocity needed for an object starting at the Earth's surface to just barely reach a satellite in a geosynchronous orbit. Ignore air drag and assume the object has a speed of zero when it reaches the satellite. (The orbital radius of a satellite in a ...
Wednesday, September 26, 2012 at 8:38pm

1. _______ is energy that flows from an object with a higher temperature to an object with a lower temperature. (1 point) Heat Radiation Potential Chemical 2. The transfer of energy that occurs when molecules bump into one another is called _____. (1 point) radiation ...
Wednesday, September 26, 2012 at 7:51pm

science
1. Force exerted on an area is called _____. (1 point) pressure temperature gravity mass 2. The composition of the atmosphere is changing due to _____. (1 point) smog ozone depletion increase in CO2 (carbon dioxide) all of the above 3. The _____ is the layer of the atmosphere ...
Wednesday, September 26, 2012 at 7:15pm

Physics
If you suddenly multiplied the mass of Earth by a factor of 4, how would the period of a satellite change, if the radius of its orbit did not change? 4 times as long 1/4 as long 2 times as long 1/2 as long Unchanged
Wednesday, September 26, 2012 at 2:31am

Physics
A satellite sitting on the ground has a weight of 5000 N. When it is placed in orbit 500 km above the surface of the Earth (which has a radius of 6380 km), which choice best describes its weight? Very small but slightly greater than zero. Zero. Still 5000 N. Slightly less than...
Wednesday, September 26, 2012 at 2:28am

1) a classmate states that igneous rock must always become sedimentary rock next, according to the rock cycle. explain why this statement is incorrect. 2)why would granite have larger crystals than igneous rock s formed when lava cooled above the earth's surface?
Tuesday, September 25, 2012 at 11:00pm

Physics
A person can jump a horizontal distance of 3.10 m on Earth, where the free-fall acceleration, g = 9.81 m/s2. (a) How far could the person jump on the moon, where the free-fall acceleration is g/6 m (b) How far could the person jump on Mars where the acceleration due to gravity...
Tuesday, September 25, 2012 at 9:17pm

Physics
On some planet other than Earth a ball is thrown upward at a velocity of 22.3 m/s. It returns back to the exact position that it started at in 8.8s. What is this planets value for "g"? (
Tuesday, September 25, 2012 at 8:15pm

Maths
Calculate the density of earth given that its mass is 5.98x10^24 kg and volume is 8.78x10^8 m/s
Tuesday, September 25, 2012 at 5:37pm

Earth Science
determine the slope of an area, given the following: Start measuring at 700ft. measure a distance of 4 miles, and end at an elevation of 2432ft
Monday, September 24, 2012 at 8:05pm

writing
I have been trying to work on this assignment and I am not really understanding it and I try to get help from my teacher and she keeps sending me this and telling me when I do this she will help me with the rest but I don't understand this and I have told her this and she ...
Monday, September 24, 2012 at 6:45pm

college physics
A new planet has been discovered that has a mass one-tenth that of Earth and a radius that is one-sixth that of Earth. Determine the free fall acceleration on the surface of this planet. Express your answer in the appropriate mks units.
Monday, September 24, 2012 at 4:19pm

college physics
Although astronauts appear weightless, they are not. They only appear weightless because they are in free fall. If a 79 kg astronaut is orbiting Earth with an orbital radius of 5.31×107 m, determine how much the astronaut would weigh. Earth's mass is 5.974 1024 kg.
Monday, September 24, 2012 at 4:17pm

college physics
new planet is discovered orbiting a distant star. Observations have confirmed that the planet has a circular orbit with a radius of 21 AU and takes 118 days to orbit the star. Determine the mass of the star. State your answer with appropriate mks units. [NOTE: AU stands for &...
Monday, September 24, 2012 at 4:17pm

earth
how long would it take a radio wave with a frequency of 4.3 X10 to the 5th power Hz to travel from Mars to Earth if the distance between the two planets is approximately 8.00 x 10 to the 7th power km?
Sunday, September 23, 2012 at 7:44pm

physics
A ball is thrown straight downward from the surface of the moon. Is the maximum height it reaches less than, equal to, or greater than the maximum height reached by a ball thrown upwards on the earth with the same initial speed? Ignore air resistance in both cases
Sunday, September 23, 2012 at 6:49pm

physics
Your friend weighs 145 lb. What is her mass in kilograms if she went to the moon where the acceleration of gravity is 1/6 that on earth? i know that her weight in newtons is 652.5, and that her mass in kilograms is 65.25, and that her weight in newtons if she went to the moon ...
Sunday, September 23, 2012 at 3:28pm

Physics
A) Gravity pulls an area of wet soil and rock downward in a landslide B) An ... Many people know that the weight of an object varies on different planets, but did ... If the Earth's gravitational force causes a falling 74 kg student to accelerate .... the acceleration of ...
Sunday, September 23, 2012 at 1:00pm

Physics
At what DISTANCE from the earth's surface will a mass of 5.0kg be just 45.0N in weight
Sunday, September 23, 2012 at 8:55am

Physics
At what distance from the earth's surface with a mass of 5.0kg be just 45.0N in weight. HELP
Sunday, September 23, 2012 at 8:42am

physics
an airplane with a speed of 40.4 m/s is climbing upward at an angle of 54 degrees with respect to the horizontal. When the planes altitude is 520 m, the pilot releases a package. a. calculate the distance along the ground measured from a point directly beneath the point of ...
Sunday, September 23, 2012 at 2:49am

physics
A projected space station consists of a circular tube that will rotate about its center (like a tubular bicycle tire) as shown in the figure . The circle formed by the tube has a diameter of about 1.1 km. What must be the rotation speed (revolutions per day) if an effect equal...
Saturday, September 22, 2012 at 8:00pm

Physics
What is the period of Earth's (nearly) circular motion around the Sun? (2*pi*r)/T 1 year (1 year)/(2*pi) (2*pi)/(1 year) 2*pi*(1 year)
Saturday, September 22, 2012 at 7:15pm

Physics
The Earth has a mass of 5.97 x10^24 kg and the Moon has a mass of 7.36 x10^22kg. The average distance between the center of the Earth and the center of the moon is 3.84 x10^8m. (a) How far away would the Moon need to be for the magnitude of the gravitational force acting on it...
Friday, September 21, 2012 at 8:32pm

earth
what is geography?
Thursday, September 20, 2012 at 11:26pm

Physics
The average person passes out at an acceleration of 7g (that is, seven times the gravitational acceleration on Earth). Suppose a car is designed to accelerate at this rate. How much time would be required for the car to accelerate from rest to 59.1 miles per hour?
Thursday, September 20, 2012 at 9:40pm

Math
Can You help me with this question? The distance from the earth to the sun is about 1.5 X 10^8 km, while the distance from the earth to the moon is about 3.8 X 10^5 km. If a scale model of the solar system is constructed so that the distance from the Earth to the Sun is 100 ...
Thursday, September 20, 2012 at 12:32pm

earth science
astonomer think planets formed from interstellar dust and gased that clumped together in a process is called what?
Thursday, September 20, 2012 at 11:44am

physics
(a) If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 3.43 m on Earth, what would be his maximum range on the Moon, where the free-fall acceleration is g/6 and g = 9.80 m/s2
Thursday, September 20, 2012 at 12:02am

Clean Energy
What are some types of clean enregy and what are they? I have geothermal - heat from the Earth, hydropower - water power, wind power, biomass (I don't know what that is), and solar power - sun power. I would really like some help.
Wednesday, September 19, 2012 at 8:33pm

geometry
EARTH COMPLETES ONE FULL ROTATION EACH DAY MAKING THE SUN APPEAR TO RISE AND SET. IF THE SUN PASSES DIRECTLY OVER HEAD, BY HOW MANY DEGREES DOES ITS POSITION IN THE SKY CHANGE EVERY HOUR?
Wednesday, September 19, 2012 at 7:55pm

earth science
descibe the advanages of plotting data in graph form
Wednesday, September 19, 2012 at 2:45pm

earth
a space traveller determines the radius of a planet to be half of earth . After landing on its surface , he finds the acceleration due to gravity to be twice of that of surface of earth. Find the ratio of mass of planet to the earth
Wednesday, September 19, 2012 at 5:53am

Physics
On a distant planet, golf is just as popular as it is on earth. A golfer tees off and drives the ball 4.1 times as far as he would have on earth, given the same initial velocities on both planets. The ball is launched at a speed of 50 m/s at an angle of 32° above the ...
Tuesday, September 18, 2012 at 9:43pm

Physics
Consider a space pod somewhere between earth and the moon, at just the right distance so that the gravitational attractions to Earth and Moon are equal. Is this location nearer Earth or Moon?
Tuesday, September 18, 2012 at 1:12am

physics
(a) If a person can jump a maximum horizontal distance (by using a 45° projection angle) of 3.43 m on Earth, what would be his maximum range on the Moon, where the free-fall acceleration is g/6 and g = 9.80 m/s2? m (b) Repeat for Mars, where the acceleration due to gravity...
Tuesday, September 18, 2012 at 12:14am

Physical Chemistry
The escape velocity, the velocity required by an object to escape from the gravitational field is given V^e = (2gr)^1/2 where r is the radius for Earth (6.37 x 10^6m). At what temperature will the c of an H2 molecule and of an N2 molecule attain the escape velocity?
Monday, September 17, 2012 at 3:42pm

What two parts of the earth system is a paleontologist involved in? Thanks
Sunday, September 16, 2012 at 8:58pm

science
if a rock undergoes high temperatures and high pressures deep within Earth, what new type of rock will be foremed? Assume that the rock does not melt
Sunday, September 16, 2012 at 8:33pm

math
It is estimated that one third of one per cent of the Earth’s surface receives more energy from the sun than the total projected needs for the year 2014. Assuming the Earth’s surface to be 1.97 x 108 square miles. Find the area in acres.
Sunday, September 16, 2012 at 7:27pm

Physics
Suppose a brick has a mass of 4.50 kg. What is the brick's weight at the surface of the Earth
Sunday, September 16, 2012 at 1:07pm

Physics
Air molecules create an upward force that impacts the free fall of objects on the surface of the Earth, differing form the way an object would fall in vacuum. Question: What kind of objects should be used for experimentation if we want to limit the impact on our experimental ...
Sunday, September 16, 2012 at 9:08am

physics
The earth moves around the sun in a nearly circular orbit of radius 1.50 1011 m. During the three summer months (an elapsed time of 7.89 106 s), the earth moves one-fourth of the distance around the sun.
Sunday, September 16, 2012 at 4:11am

physics
The earth moves around the sun in a nearly circular orbit of radius 1.50 1011 m. During the three summer months (an elapsed time of 7.89 106 s), the earth moves one-fourth of the distance around the sun.
Sunday, September 16, 2012 at 4:10am

Physics
A 4.51-kg object is thrown vertically upward from the surface of Earth, where the acceleration due to gravity is g1 = 9.81 m/s2. The initial velocity is v1, and the object reaches a maximum height of y1. What is the maximum height, y2, if the object is thrown with a speed of ...
Saturday, September 15, 2012 at 4:40pm

physics
An airplane with a speed of 88.0 m/s is climbing upward at an angle of 72.1 ° with respect to the horizontal. When the plane's altitude is 779 m, the pilot releases a package. (a) Calculate the distance along the ground, measured from a point directly beneath the point...
Saturday, September 15, 2012 at 4:06pm

Physics
If a satellite is orbitting the earth 710km above the earths surface, and it's velocity is 7,406.8 meters/sec, what is it's cetripedal acceleration??
Friday, September 14, 2012 at 11:29pm

earth
waste produced by people along the east coast of the united states has been dumped into the atlantic ocean where it is distriuted y surface ocean currents, Which coastel area is most liekly to become polluted by this waste?
Friday, September 14, 2012 at 8:35pm

physical science
the acceleration of gravity on the surface of venus is 8.9 m/s2. would a ball thrown upward from venus return to the ground sooner or later than a ball thrown upward with the same speed on the earth?
Friday, September 14, 2012 at 7:37pm

chemistry
"The sun emits UV radiation that can have serious health consequences. In particular, so-called UVB radiation is mostly absorbed by the ozone layer in the upper atmosphere (altitudes of 10 - 50 km), but the part that reaches the earth can cause DNA mutations. The highest ...
Friday, September 14, 2012 at 11:09am

Chemistry
"The sun emits UV radiation that can have serious health consequences. In particular, so-called UVB radiation is mostly absorbed by the ozone layer in the upper atmosphere (altitudes of 10 - 50 km), but the part that reaches the earth can cause DNA mutations. The highest ...
Thursday, September 13, 2012 at 11:19pm

math
It is estimated that one third of one per cent of the Earth’s surface receives more energy from the sun than the total projected needs for the year 2014. Assuming the Earth’s surface to be 1.97 x 108 square miles. Find the area in acres.
Thursday, September 13, 2012 at 9:46pm

Pages: <<Prev | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>