Friday
May 22, 2015

Homework Help: Science: Earth

Recent Homework Questions About Earth

Science- 8th grade- please help!!
1) What evidence is there that the human species has been successful so far? Explain. 2) What environmental pressures in the past do you think were most important in shaping the human species as it exists today? 3) What environmental pressures exist now that you think may be ...
Thursday, May 21, 2015 at 10:17pm

science
1. How is an area’s topography determined? (1 point) A.by using an area’s longitude and latitude B.by using an area’s scale C.by using an area’s elevation, relief, and landforms*** D.by using an area’s elevation, longitude, and latitude 2. How do ...
Wednesday, May 20, 2015 at 3:45pm

please help asap
can u help and give me feedback please Literary Analysis of Song of Becoming. Song of Becoming by Fadwa Tuqan is talking about growing up. Becoming legends. It’s about what happens after growing up. It starts off with “…they are only boys who used to frolic and ...
Tuesday, May 19, 2015 at 8:40pm

english
i need help checking this paper can you please give me feedback Literary Analysis of Song of Becoming. Song of Becoming by Fadwa Tuqan is talking about growing up. Becoming legends. It’s about what happens after growing up. It starts off with “…they are only ...
Tuesday, May 19, 2015 at 8:08pm

Science
1.A weatherman reports, “The storm waves are about 2 meters high and about 35 meters apart.” What properties of waves is the reporter describing? (1 point) A.frequency and wavelength B.wavelength and wave speed C.amplitude and wavelength D.amplitude and frequency 2. ...
Tuesday, May 19, 2015 at 3:48pm

English
1.Which of the following is used when political candidate highlights his or her experience in finance as the basis of a plan for economic recovery? A.Ethos B.Pathos C.Logo***** 2. Identify the sentence that most strongly relies on emotional language. A. It took a lot of work, ...
Tuesday, May 19, 2015 at 10:11am

science (any tutor)
Very few fossils of jellyfish or their close relatives have been found. This makes it hard to trace the evolutionary history of jellyfish using the fossil record. What explains this? A. Jellyfish fossils are buried deep under the ocean floor, not in land areas where scientists...
Monday, May 18, 2015 at 2:53pm

algebra
The distance D , in miles to the horizon from an obsever's point of view over water or flat earth is given below , where H is the height of the point of view in feet . if a person whose eyes are 5ft above ground level is standing at the top of hill 45 ft above 'flat&...
Saturday, May 16, 2015 at 11:52pm

Language Arts
I have 6 questions but the story "the importance of being earnest" Act 1, Sence 1 1.which sentence best reveals the theme of this passage? A: "more than half of modern culture depends on what one shouldn't read." B: "the truth is rarely pure and ...
Saturday, May 16, 2015 at 7:52pm

math
2.If a sledgehammer that weighs 18 newtons on Earth will weigh about 4 newtons on the planet Namar, then your weight on Namar would be about ___ times your weight on Earth. A. 0.25 B. 4 C. 0.5 D. Not enough information
Thursday, May 14, 2015 at 9:32pm

biology o science
Very few fossils of jellyfish or their close relatives have been found. This makes it hard to trace the evolutionary history of jellyfish using the fossil record. What explains this? (1 point) Jellyfish fossils are buried deep under the ocean floor, not in land areas where ...
Thursday, May 14, 2015 at 4:45pm

English
1. Which of these lines contains the clearest example of dialect in poetry? A.) "I'll get a blessin' wi' the lave..." B.) "By the stream & o'er the mead..." C.) "To such a deep delight 'twould win me..." D.) "But oft, in ...
Thursday, May 14, 2015 at 2:37pm

Physics
A satellite of the Earth has a mass of 1550 kg. It orbits Earth with a mean radius of orbit of 7.00 x 10^6 m. a) What is the gravitational potential energy of the satellite with respect to Earth?
Thursday, May 14, 2015 at 12:22am

Science: Space
I'm having trouble finding the answers to these fill-in-the-blank questions: Our understanding of the solar system has changed from an Earth-centered model of ____ and ____ to the sun centered model of _____ and _____. I was thinking for the first 2 blanks: rocks; oxygen ...
Wednesday, May 13, 2015 at 5:09pm

English
Are these right? IF not please help me understand them thank you. Identify the sentence that most strongly relies on emotional language. It took a lot of work, but we finally got the job done. With hard work and dedication, we got the job done.** We had to move heaven and ...
Wednesday, May 13, 2015 at 3:49pm

science please help
in evolutionary terms, RNA is thought to have preceded proteins and DNA. Which of the following observations provides the most convincing support for hypothesis? a) there are more types of RNA than there are DNA b) RNA contains combined catalytic, structural, and genetic ...
Wednesday, May 13, 2015 at 3:42pm

math
Q2. An agriculture field is rectangular,with dimensions 100m by 42m.A 20m deep well of diameter 14m is dug in acorner of the field and the earth taken out is spread evenly over the remaining part of the field. Find the increase in the level of the field.
Wednesday, May 13, 2015 at 7:02am

math
A40m deep well with radius 3.5m is dug and the earth taken out is evenly spread to form aplateform of dimension 28m by 22m.find the height of the platform.
Wednesday, May 13, 2015 at 6:28am

Physics
If a small planet were discovered whose orbital period was twice that of Earth, how many times farther from the Sun would this planet be? The answer for this one is 1.6 earth radii, but I can't seems to get solution to find the answer. I would appreciate for any hint or help.
Tuesday, May 12, 2015 at 4:23pm

English
Do I need parentheses or dashes in this sentence? Copernicus as you might know. decided that the earth travels around the sun.
Monday, May 11, 2015 at 8:37pm

physics questions
1. The batteries in a digital alarm clock provide a terminal voltage of 9 V. What is the potential difference across the entire clock current? A. 4.5 V B. 18.0 V C. 9.0 V D. 6.0 V **C is my answer 2. Why does the earth have a magnetic declination? a. the earth's axis of ...
Monday, May 11, 2015 at 7:38pm

Physics
Consider a situation where immediately after birth, twins are separated. One continues to live on earth, while the other is whisked away in a space ship at 90% of the speed of light. After 65 years they are reunited. Will they look the same? Show proof of your answer through ...
Sunday, May 10, 2015 at 1:02pm

Science
one year ago How many Global Positioning System (GPS) satellites are required to pinpoint your location on Earth’s surface? (1 point) 24 12 3 5 i think it's 4, but 4 is not an option
Saturday, May 9, 2015 at 9:48pm

physics
If a small planet were discovered whose orbital period was twice that of Earth, how many times farther from the Sun would this planet be?
Saturday, May 9, 2015 at 5:30am

Physics
The speed of light is about 3.00 x 10 to the power of 5 km/s. It takes approx. 1.28 seconds for light reflected from the moon to reach Earth. What is the average distance from Earth to the moon? Thank you
Friday, May 8, 2015 at 8:37pm

Science, check answers please
When a fan is turned on, it changes electrical energy into ____________ energy. -Motion** -Magnetic -Gravitational -Electromagnetic An experiment discovered that a particular material was a poor conductor of electricity. This material would most likely be used as a(n) -...
Friday, May 8, 2015 at 10:35am

Physics
The space shuttle releases a space telescope into orbit around the earth. The telescope is traveling at a speed of 1700m/s in 25 seconds. What is the distance of the satellite? d = v x t d = 1700 x 25 = Is that the correct formula? Thank you.
Friday, May 8, 2015 at 7:05am

physics
Light is shining perpendicularly on the surface of the earth with an intensity of 680 W/m2. Assuming that all the photons in the light have the same wavelength (in vacuum) of 521 nm, determine the number of photons per second per square meter that reach the earth.
Wednesday, May 6, 2015 at 11:07pm

Science
Are these answers correct? 1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere**** Chromosphere Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar ...
Wednesday, May 6, 2015 at 1:27pm

Science
WHICH SYSTEM HAS THE GREATEST TIDAL EFFECT? EARTH-SUN OR EARTH-MOON?
Tuesday, May 5, 2015 at 7:27pm

science
Earth's energy sources include both nonrenewable and renewable resources. Name at least three sources of energy that could be used in your house. The describe the ideal energy source for generating most of your home's electricity, and explain why you chose that source...
Tuesday, May 5, 2015 at 6:14pm

functions
A person’s weight, w, on a planet of radius r is given by: w= kr^-2 k < 0 where the constant, k, depends on the masses of the person and the planet.What fraction of the Earth’s radius must an equally massive planet have for a person to weigh ten times more on that...
Tuesday, May 5, 2015 at 12:12am

physics
The length of a moving spaceship is 27.0 m according to an astronaut on the spaceship. If the spaceship is contracted by 14.5 cm according to an Earth observer, what is the speed of the spaceship? I know L=27m and delta L= 0.145 so our contracted length is 26.855 so what ...
Monday, May 4, 2015 at 3:37pm

Earth Science
the magnification of a telescope is changed by changing what? my answer is the eyepiece
Sunday, May 3, 2015 at 9:52pm

Science
On what sides does a "bulge" in the earth's oceans appear on the earth?
Sunday, May 3, 2015 at 8:17pm

Science
How does the sun's gravitational attraction to the earth compare to that of the moon?
Sunday, May 3, 2015 at 8:09pm

physics
GPS satellites orbit the earth about 20,000 km above the surface of the earth. The radius of the earth is 6,371 km. What is the acceleration due to earth’s gravity on the GPS satellites? i've tried fooling around with the A = V^2/ R and V = 2pir/T equations, but I ...
Friday, May 1, 2015 at 8:35pm

Physics
Update: Planets are not uniform inside. Normally, they are densest at the center and have decreasing density outward toward the surface. Model a spherically symmetric planet, with the same radius as the earth, as having a density that decreases linearly with distance from the ...
Thursday, April 30, 2015 at 11:53pm

Earth Science
What are some factors that make it difficult for geologist to learn about the Precambrian era?? Please Explain
Thursday, April 30, 2015 at 11:18am

English, pls help ASAP!!
MY answers are below the poems, pls check them for me!!!! Match the category of poetry with the except or poem A. Poetry of place B. Poetry of spirit C. Poetry of nature D. Poetry of family think it is (in order): Poetry of Nature, Poetry of Place, Poetry of Spirit, and Poetry...
Wednesday, April 29, 2015 at 5:43pm

Physics please help
He drops a ninja ball device from a height of 10.0m. The mass of the enter device is 190g and the mass of the top (smallest) ball is 2.90g A) calculate the momentum of the device as it hits the ground (ignore air resistance) I know that this answer is 2.66 for sure B) if the ...
Tuesday, April 28, 2015 at 7:24pm

World Geo, Help pls
3. According to Aborigine spiritual beliefs, the Earth is (1 point) a place of unending suffering and pain. a source of wealth to conquer in the name of one's ancestors. an ancient gift of the gods. a place where humans were banished from the gods. 4. All of the following ...
Monday, April 27, 2015 at 5:45pm

World Geo, Help pls
Please help!!! Which of the following is not true about Aborigine culture? (1 point) It is the oldest surviving culture on Earth. Traditional Aborigine societies formed agricultural settlements. Aborigines do not believe that land belongs to humans. Aborigine groups are spread...
Monday, April 27, 2015 at 4:42pm

Physics
A large pendulum with a 200-lb gold-plated bob 12 inches in diameter is on display in the lobby of the United Nations building. Assume that the pendulum has a length of 78.4 ft. It is used to show the rotation of the Earth - for this reason it is referred to as a Foucault ...
Sunday, April 26, 2015 at 10:59pm

Science
Which evidence from the sea floor shows that tectonic plates move? a) the sea floor is youngest near a mid-ocean ridge and older farther away b) The sea floor is much older than the continents c) mid-ocean ridges form the longest range of mountains on earth d) The sea floor is...
Friday, April 24, 2015 at 6:44pm

Science
the force of gravity on jupiter is much stronger than the force of gravity on earth. which of the following explains why this is true. A. Jupiter's orbit is farther away from the Sun and Earths orbit B. Jupiter has more mass than Earth C. Jupiter's orbit is closer to ...
Thursday, April 23, 2015 at 2:52pm

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
Thursday, April 23, 2015 at 9:56am

Science- Earth's History- 1 question
Which of the following events occurred during the Mesozoic era? a. Dinosaurs became common on land. b. Whales and dolphins evolved in the oceans. c. Reptiles evolved on land. d. The supercontinent Pangaea formed. i think its c
Wednesday, April 22, 2015 at 10:39am

science
the sun photosphere gives off radiation that reaches earth as what
Wednesday, April 22, 2015 at 10:21am

maath algegra 5
force of gravity on Earth is 6 times greater than on the moon. As a result, objects weigh 6 times as much on Earth as they do on the moon. A scientific instrument weighs 34 pounds on the moon. How much does the instrument weigh on Earth
Tuesday, April 21, 2015 at 5:00pm

physics
The coil in a generator has 200 windings and a cross-sectional area of 0.0100 m^2. If the coil turns at a constant rotational speed and the magnetic field in the generator is that of Earth (B = 0.500 × 10^-4 T), how many 360 rotations must the coil complete each second ...
Tuesday, April 21, 2015 at 12:11am

Science
The diagram below shows a process in Earth's crust. Which of the following statements best describes the process in the diagram. A Converging plates from Mountains B Converging plates from Volcanoes C Diverging plates form Mountains D Diverging plates form a rift valley I ...
Monday, April 20, 2015 at 4:47pm

Science
Which of the following statements is true? A. There is more water on Earth now than there was millions of years ago. B. There is less water on Earth now than there was millions of years ago. C. There is no way to tell how much water was on Earth millions of years ago. D. There...
Sunday, April 19, 2015 at 8:57pm

Chemistry
Which of the following processes are spontaneous? (Select all that apply.) a. average car prices increasing b. a soft-boiled egg becoming raw c. a satellite falling to Earth d. water decomposing to H2 and O2 at 298 K and 1 atm I thought it would c and maybe d
Saturday, April 18, 2015 at 5:31pm

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
Saturday, April 18, 2015 at 1:59pm

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
Saturday, April 18, 2015 at 11:30am

Science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of the sun? Photosphere Chromosphere*************** Corona Prominence 2. Which of the following materials could have been found in the giant cloud that formed the solar system? Hydrogen and...
Friday, April 17, 2015 at 11:58pm

Science
"Earth's energy sources include both renewable and nonrenewable resources. Name at least three sources of energy that could be used in your house. Then describe the ideal source of energy for generating most of your home's electricity, and explain why you chose ...
Friday, April 17, 2015 at 6:38pm

Science
1. How did planetesmals form planets? They broke apart into smaller chunks They collided and stuck together They cooled and pulled ice together****** They began to rotate 2. What distance was used to define the astronomical unit (AU)? The average distance across the sun, its ...
Friday, April 17, 2015 at 4:40pm

Science
1. How did planetesmals form planets? They broke apart into smaller chunks They collided and stuck together They cooled and pulled ice together They began to rotate 2. What distance was used to define the astronomical unit (AU)? The average distance across the sun, its ...
Friday, April 17, 2015 at 1:41pm

physics
If I weigh 741 N on Earth at a place where g = 9.80 m/s2 and 5320 N on the surface of another planet, what is the acceleration due to gravity (in m/s2) on that planet?
Wednesday, April 15, 2015 at 10:54pm

Science
Which sphere of the Earth system contains nearly all of Earth's mass? A. the geosphere B. the atmosphere C. the biosphere D. the hydrosphere
Monday, April 13, 2015 at 1:43pm

trigonometry
I wont be receiving credit for these problems but i was just wondering how would i answer them... A) The area of a sector of a circle with a central angle of 25π rad is 21 mm². B) The angle between 0 and 2π in radians that is coterminal with the angle 487π ...
Monday, April 13, 2015 at 12:56am

earth science
What is the most abundant fossil fuel? A:Coal B:Gas C:Wood D:Oil
Sunday, April 12, 2015 at 9:48pm

math
what is the linear velocity of a point in Sydney, Australia which is at latitude 33deg 55'S. Radius of earth is 6370km.
Sunday, April 12, 2015 at 6:21am

Math
A probe launched from Earth to Mars is traveling at an average speed of 1.8 * 10^4 kilometers per hour. If the distance between Earth and Mars is approximately 2.25 * 10^6 kilometers, about how many hours will it take the probe to reach Mars? PLEASE EXPLAIN YOUR REASONING
Saturday, April 11, 2015 at 8:16pm

Physics
The velocity of the Moon relative to the center of the Earth can be approximated by varrowbold(t) = v [−sin (ωt) xhatbold + cos (ωt) yhatbold], where v = 945 m/s and ω = 2.46 multiplied by 10−6 radians/s. (The time required for the Moon to complete ...
Friday, April 10, 2015 at 9:43pm

science ms sue plz help
1. Which layer of the sun's atmosphere are you looking at when you look at an image of a sun? A) Photosphere B) Chromosphere C) Corona D) Prominence 2. What materials could have been found in a giant cloud that formed the solar system? A- hydrogen and helium B- hydrogen ...
Friday, April 10, 2015 at 2:05pm

Earth Science
Which of the following are you most likely to experience a-total solar eclipse b-total lunar eclipse c-full moon d-partial lunar eclipse? my answer is full moon
Thursday, April 9, 2015 at 5:31pm

satellite communication
If a satellite is launched at an orbital radious of twice that of a geostationary satellite ,how much time will the launched satellite take to travel around the earth ?
Wednesday, April 8, 2015 at 12:33pm

plz help science
1. Which layer of the sun's atmosphere are you looking at when you look at an image of a sun? A) Photosphere B) Chromosphere C) Corona D) Prominence 2. What materials could have been found in a giant cloud that formed the solar system? A- hydrogen and helium B- hydrogen ...
Wednesday, April 8, 2015 at 11:24am

trigonometry
You are standing on the equator of the earth (radius 3960 miles). a) what is your linear speed in miles per hour? b) what is the angular speed in radians per hour?
Wednesday, April 8, 2015 at 3:25am

science
these are all very confusing for me 1. Explain why Earth and other planets were not solid when they formed during the beginning of the Precambrian, approximately 4,600 million years ago (MYA). What was this particular time period called, and why is this time period not really ...
Tuesday, April 7, 2015 at 6:50pm

Science(need help)
1) What evidence is there that the human species has been successful so far? Explain. 2) What environmental pressures in the past do you think were most important in shaping the human species as it exists today? 3) What environmental pressures exist now that you think may be ...
Tuesday, April 7, 2015 at 6:39pm

sience plz hep
1. Which layer of the sun's atmosphere are you looking at when you look at an image of a sun? A) Photosphere B) Chromosphere C) Corona D) Prominence 2. What materials could have been found in a giant cloud that formed the solar system? A- hydrogen and helium B- hydrogen ...
Tuesday, April 7, 2015 at 6:05pm

Physics 1
A rotating cylinder about 5.0 miles in diameter is designed to be used as a space colony. With what tangential velocity must it rotate so that the residents on it will experience the same acceleration as that due to gravity on Earth? Recall that ag=g=-9.8 m/s^2 and 1 mi=1609 m...
Tuesday, April 7, 2015 at 12:06pm

Astronomy
Why will detecting Earth-sized planets be much more difficult than finding Jupiter-sized planets around other stars?
Tuesday, April 7, 2015 at 1:28am

Reading//LA
"President Lincoln’s Declaration of Emancipation, January 1, 1863" by Frances E. W. Harper 1 It shall flash through coming ages, 2 It shall light the distant years; 3 And eyes now dim with sorrow 4 Shall be brighter through their tears. 5 It shall flush the ...
Monday, April 6, 2015 at 9:16pm

physics
The sun’s mass is about 2.7 x 107 times greater than the moon’s mass. The sun is about 400 times farther from Earth than the moon. How does the gravitational force exerted on Earth by the sun compare with the gravitational force exerted on Earth by the moon? Amoon = ...
Sunday, April 5, 2015 at 9:50pm

physics
At a particular point, a satellite in an elliptical orbit has a gravitational potential energy of 7000 MJ with respect to Earth’s surface and a kinetic energy of 4000 MJ. At another point in its orbit, the satellite’s potential energy is 2000 MJ. What is its kinetic ...
Sunday, April 5, 2015 at 9:07pm

Physics
If a person weighs 500 N on Earth, what would she weigh on Jupiter, where the acceleration due to gravity is 26 m/s2? Show all work leading to your answer.
Sunday, April 5, 2015 at 5:17pm

Physics
Suppose we had a straight tunnel, through Earth's center, to a point on the opposite side of the planet, and used it to deliver mail to the other side. With what speed would our packages pass through Earth's center. So: ag = (GM)/R2 Mins = (4/3)πR3*ρ So, I&#...
Saturday, April 4, 2015 at 1:16pm

Physics
What is the ratio of the wight of a man when he is in a tunnel 1000 km below the surface of the Earth to his weight at the surface? ...I'm not sure how to proceed, not because I don't know how to do it, but because I have no idea how to come up with a(g) 1000 km inside...
Saturday, April 4, 2015 at 12:28pm

Science
Which statement describes the relationship among the sun wing and ocean currents A. The sun heats the ocean surface causing water to evaporate producing wind currents B.The sun heats earth unequally cuaing winds that drive ocean surface currents C.The sun heats the air and the...
Wednesday, April 1, 2015 at 8:27pm

History
1. Why is Lincoln giving a speech at Gettysburg? A.To declare the Confederacy an outlaw nation B.To declare that to goal of the Union is to abolish slavery C.To dedicate a national cemetery for Union and Confederate dead D.To try Confederate soldiers for treason A? 2.When ...
Wednesday, April 1, 2015 at 7:43pm

Physic
If your weight on Earth is 637 Newton, what is your mass in kg?
Wednesday, April 1, 2015 at 2:33pm

Mathematics
The distance to the nearest 100,000 km from the earth to the moon is given as 400,000 km. The average speed to the Nearest 500km/h is 3500km/h. Calculate the least and greatest time it takes the rocket to reach the moon  I figured out the formula speed = distance / time ...
Tuesday, March 31, 2015 at 9:09pm

math
The distance to the nearest 100,000 km from the earth to the moon is given as 400,000 km. The average speed to the Nearest 500km/h is 3500km/h. Calculate the least and greatest time it takes the rocket to reach the moon I figured out the formula speed = distance / time but ...
Tuesday, March 31, 2015 at 8:52pm

science PLZ HELP
electric charges that are different A) attract each other B) repel each other C) exist in pairs D) do not interact Magnetic field lines around a bar magnet A) are only perpendicular to the magnet B) spread out from one pole and curve around the other C) cross back and forth ...
Tuesday, March 31, 2015 at 2:29pm

Precalculus
Find an equation of the circular orbit of a satellite 500 miles above the surface of earth. Place the origin of the rectangular coordinate system at the center of Earth and assume that the radius of Eatch is 4000 miles.
Sunday, March 29, 2015 at 10:27pm

Physics
The drawing (not to scale) shows one alignment of the sun, earth, and moon. The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of earth=5.98 × ...
Sunday, March 29, 2015 at 1:14pm

physics
The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of earth=5.98 × 1024 kg, mass of moon=7.35 × 1022 kg. The distances shown in the drawing ...
Saturday, March 28, 2015 at 9:10pm

Earth Space Science
the horizontal distance between a crest to the next trough of an ocean wave is 5 meters. what is the wavelength of the ocean wave? A)2 meters B)5 meters C)10 meters D)20 meters I think its 10 meters but im not so sure, I would like to make sure.
Saturday, March 28, 2015 at 4:23pm

physics
The gravitational force that the sun exerts on the moon is perpendicular to the force that the earth exerts on the moon. The masses are: mass of sun=1.99 × 1030 kg, mass of earth=5.98 × 1024 kg, mass of moon=7.35 × 1022 kg. The distances shown in the drawing ...
Saturday, March 28, 2015 at 11:01am

physics
mercury rotates about its own axis once every 58.6 Earth days. a satellite orbits mercury once every murcurian day. how high is this satellite above mercury's surface? mass of mercury = 3.2x10^23 kg. the radius of mercury is 2400km.
Saturday, March 28, 2015 at 3:40am

PHYSICS HELP
Suppose the aliens watching the show are on the surface of Mars. Mass of Mars: 6.42 x 10^23 kg Radius of Mars: 3.394 x 10^6 m Calculate; A) the weight of a 40.0 kg alien on Mars B) the weight of 40.0kg alien on earh Earth-sun distance:1.50x10^11m Mars-sun distance: 2.28 x10^11...
Thursday, March 26, 2015 at 5:27pm

astronomy
The distance from Earth of the red supergiant Betelgeuse is approximately 643 light-years. If it were to explode as a supernova, it would be one of the brightest stars in the sky. Right now, the brightest star other than the Sun is Sirius, with a luminosity of 26LSun and a ...
Thursday, March 26, 2015 at 12:31am

Earth science
how does the temperature of ocean currents affect climate?
Wednesday, March 25, 2015 at 6:43pm

physics
An object is projected from the surface of the earth with a speed of 2.73x10^4 m/s. What is its speed when it is very far from the earth? (Neglect air resistance).
Tuesday, March 24, 2015 at 10:36pm

PHYSICS -urgent
A bomber in level flight, flying at 92m/s, releases a bomb at a height of 1950m. (a) How long is it before the bomb strikes earth? (19.9s) (b) How far does it travel horizontally? (1832m) (c) What are the horizontal and vertical components of its velocity when it strikes? (...
Tuesday, March 24, 2015 at 7:25pm

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Homework Help: Science

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