Saturday
November 22, 2014

Search: Science - The Sun

Number of results: 26,904

science
what type of spectrum does the sun emit? where does nuclear fusion in the sun occur? if a star begins its evolution with 10 times the mass of the sun, but ends up with 2 times the mass of the sun, what type of object does it form?
March 30, 2009 by bo

Science
How does life on Earth depend on the sun? I put If the Earth is too near from the sun then it will be too hot and we wouldnt't be able to live. But if the Earth is too far from the Sun then it would be too cold. Is that a right answer?
November 21, 2011 by Himey

Science - The Sun
What is the true thickness of each of the sun's layers (core, radiation zone, convection zone, photosphere, chromosphere, and corona)? What is the age, composition, average density, period of rotation, distance from Earth, and source of energy from the sun?
November 7, 2013 by Help

science
A comet is in an elliptical orbit around the Sun. Its closest approach to the Sun is a distance of 4.8 x10^10 m (inside the orbit of Mercury), at which point its speed is 9.1 x10^4 m/s. Its farthest distance from the Sun is far beyond the orbit of Pluto. What is its speed when...
July 8, 2014 by rachel

science
Which of the statements below are true? a) The surface of the sun is over 10,000 degrees F B) The sun is hot enough to heat the earth and give light to the planets c) The sun will continue to burn for at least another 5 billion years d) all of the above Just need to know if my...
August 18, 2010 by ant

science
An asteroid in an elliptical orbit about the sun travels at 2.0 106 m/s at perihelion (the point of closest approach) at a distance of 3.8 108 km from the sun. How fast is it traveling at aphelion (the most distant point), which is 8.3 108 km from the sun?
September 12, 2012 by Anonymous

natural science
what gas does the sun burn? Thank you for using the Jiskha Homework Help Forum. Here's an interesting site about the sun. The source of the sun's fuel is hydrogen and helium gases. Due to a special chemical reaction, called nuclear fusion, the hydrogen gas is burned. http://...
May 18, 2007 by Celsy

science
If Earth is 149.6 million Kilometers from the sun, or 93 million miles away. suppose there was an imaginary road from earth to the sun. If you were in a car traveling 100 km an hour, it would take you 1,490,000 hours or just 170 years to reach the sun. If it took 170 years to ...
April 2, 2008 by Dj

science
Our solar system consists of_____? a) the moon and the planets b) the sun and the planets c) the sun and the moon d) the sun and the planets with their moons Just need to know if my answer or right or wrong. Thanks! :) d
August 18, 2010 by ant

Science
Which of the following is a star? Earth Sun Moon a Comet? Sun?
April 19, 2012 by Jerald

science
explain how gravitational pull of the sun and inertia keep the earth in orbit around the sun?
October 6, 2009 by Aj

science i neeeddd help
How did the sun wind up in the middle of the solar system? Did the materials, gas and dust that eventually formed the planets come from the sun? I think this is the answer is it correct- Since our solar system is already formed, we must try to reconstruct its history by ...
April 19, 2007 by Hot Stuff

physics
The orbit of Halley's Comet around the Sun is a long thin ellipse. At its aphelion (point farthest from the Sun), the comet is 5.1 1012 m from the Sun and moves with a speed of 12.0 km/s. What is the comet's speed at its perihelion (closest approach to the Sun) where its ...
March 29, 2011 by Meisha

physics
The sun is 1.5 1011 m from the earth. (a) Over what surface area is solar radiation spread at this distance? (b) What is the total power radiated by the sun? (The sun delivers energy to the surface of the earth at a rate of approximately 1400 W/m2.) (c) Treating the sun as a ...
April 9, 2012 by JOHN

Science
I am doing a 3rd grade science project on the Sun. I have to create a "visual". I want to compare the size of the earth to the size of the sun. I found that you could put 1,000,000 earths inside the Sun. I would like to fill a container [representing the Sun] with something ...
February 2, 2011 by Ann

Science
What happens as a comet approaches and moves away from the sun? As a comet approaches towards the sun it becomes warm. Then as it moves away from the sun, it forms a glowing tail and extends over 100 million km. Please tell me if this is correct, thanks
February 15, 2010 by Sara

Science
What happens as a comet approaches and moves away from the sun? As a comet approaches towards the sun it becomes warm. Then as it moves away from the sun, it forms a glowing tail and extends over 100 million km. Please tell me if this is correct, thanks
February 15, 2010 by Sara

Science-Help
What happens as a comet approaches and moves away from the sun? As a comet approaches towards the sun it becomes warm. Then as it moves away from the sun, it forms a glowing tail and extends over 100 million km. Please tell me if this is correct, thanks
February 15, 2010 by Sara

physics-sun
a 1 square meter solar panel receives a total of 1000Watts from the sun. If we assume all the energy is release through nuclear fusion from the sun what is the total output from the sun?Given you know the total mass of the sun and have just calculated the total output assume ...
May 9, 2011 by jen

Science
Can you recommend a good site that explains why we use filters to observe the Sun in different wavelengths,and why the outer part of the Sun (Corona)is hotter than the inner parts.
June 23, 2009 by nichola

science
hypothesize- mercury is the closest planet to the sun, yet it does not reflect much of the sun's light. what can you say about its color? can you please explain the question and answer it -thanks in advance
November 26, 2010 by sally

science
i'm not sure witch statement is true .The earth has a stronger gravitational pull than the Sun because it is smaller in mass. .Planets would travel in a straight line if it weren't for the force of the Sun's gravity. .The Sun's gravitational pull is weaker on planets that are ...
October 23, 2008 by Alie

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
October 11, 2012 by Americal

Science Question 1
The entire spectral classification of our Sun is what? A.M5V B.G2lB C.K9lll D.Not Given D. (not given) The sun is a G2V star.
October 23, 2006 by Liz

science
if earth is one astronomical unit from the sun and has a period of 1 year, approximately how far is planet X form the sun if it has a period of 26 yearS
January 11, 2011 by bob

Science
Express mass of the Earth in unit of M. Take ME = 6 x 1024kg. The apparent magnitude of the sun is £° 26.81 and that of another star is£°1.81. How much brighter the sun is with respect to that star ?
December 2, 2012 by Sanjay

science
The sun goes around the center of our galaxy once every 250 million years. The sun is also 2.55◊1020 m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in m/s2?
March 18, 2013 by ayan

Science
Facts about the sun are? I have 1. the only star in our solar system 2. sun spots are cooler areas on sun's surface 3. from solar energy 4.Solar flares 5. only star you see during the day 6.made of gas 7.closest star to our earth
November 17, 2011 by Johnny

Science
2. Summer occurs on the hemisphere of Earth that is _____. turned away from the sun tilted toward the sun tilted away from the sun turned toward the sun 3. Earth has a(n) _____ and _____ magnetic pole, just as a bar magnet has opposite magnetic poles at each of its ends. up, ...
January 15, 2013 by Jman

science
I remember hearing something about how the Mayans predicted that it took so many days for the sun to orbit the sun and then Nasa recently figure out that they were only slightly off. Does anyone know about this? Thanks
April 12, 2010 by :)

physics
the energy received by the earth from the sun is 1400w/m2. Assuming that the sun is a black body radiator and the ratio of the radius of the earth's orbit to the sun's radius is 216. Calculate the surface temperature of the sun. Stefan constant = 0.000000057w/m2 k4.
April 16, 2012 by frank fred

Science
What factors affect weather and climate? I think it's the sun, the water cycle, the atmosphere, and the ocean. The Sun is the most important because you need the sun for water cycle You need the ocean for the water cycle
December 7, 2011 by Jaycee

earth
The quantity of radiation received by earth from the sun is 1.4 kW / m2. Assuming that sun is an ideal radiator, calculate the surface temperature of the sun. The ratio of the radius of earth's orbit to the radius of the sun is 216.
June 27, 2012 by kamal

science
the phenomena of parallelism of axis? a- results in the production of day and night b- causes different hemispheres of the earth to tilt toward the sun c- determines the angle at which the sun's rays will strike the earth d- all of the above
March 2, 2011 by latasha

physics
At perihelion on Feb. 9, 1986, Halleyís comet was 8.79 ◊ 107 km from the sun and was moving at a speed of 54.6 km s−1 relative to the sun. Calculate its speed (a) when the comet was 1.16 ◊ 108 km from the sun, and (b) at its next aphelion in the year 2024, when the comet...
March 15, 2012 by swapnali

physics
Rank the average gravitational forces from greatest to least between:A. Sun and Mars.B. Sun and the Moon.C. Sun and Earth. i answer b,c,a and its wrong
March 3, 2012 by Christie

physics
I keep getting the wrong answer... A solar model is used to calculate the expected temperature and density at all depths within the Sun. These results are then used to calculate the expected fusion rate within the Sun. We have confidence that the model is correct because it ...
April 17, 2011 by Misty

math word problem
Jim is making a diagram of the solar system. If he draws Neptune, which is 2795 million miles from the sun, 10 inches from the sun on his paper, how far away (to the nearest tenth of an inch) from the sun should he draw Mars, which is 142 million miles from the sun?
March 21, 2010 by Paula

physics
rank the average gravitational force from greatest to least between (a) sun and mars (b)sun and moon (c) sun and earth include an explanation PLEASE!!!!
January 3, 2014 by gina

Science
If the sun is in the center of the constellation Sagittarius on January 10, what time would the sun rise and what time would it set? Need an answer!!!!!
March 26, 2010 by Jenny

Science
If the sun is in the center of the constellation Sagittarius on January 10, what time would the sun rise and what time would it set? Need an answer!!!!!
March 26, 2010 by Jenny

physics
The light from the sun is found to have a maximum intensity near the wavelength of 470 nm assuming the surface nof the sun a s a black body the temperature of the sun is ----------
February 27, 2013 by prasad

physics
The light from the sun is found to have a maximum intensity near the wave length of 470nm assuming the surface of the sun as a black body,the temperature of the sun is....
February 28, 2013 by Raj

Science
1. Which of the following is an example of energy transfer from the sun to a producer and then to a consumer? a. sun warms rocks; squirrels climb over rocks; squirrels are eaten by other animals b. sunlight helps plants to grow and deer eat plants c. sun heats pond water; fish...
March 1, 2012 by Cheryl

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

Physics
Our sun rotates in a circular orbit about the center of the Milky Way galaxy. The radius of the orbit is 2.2 1020 m, and the angular speed of the sun is 1.2 10-15 rad/s. (a) What is the tangential speed of the sun? m/s (b) How long (in years) does it take for the sun to make ...
March 6, 2008 by John

Physics Question
Find the point between Mars and the Sun at which an object can be placed so that the net gravitational force exerted by Mars and the Sun on this object is zero. We are given a chart with information on the mass, etc. of planetary objects. I know to use law of universal ...
November 19, 2006 by Jennifer2008

science
the sun sets, fully disappearing over the horizon as you lie on the beach, your eyes 10 cm above the sand. you immediately jump up, your eyes now 130 cm above the sand, and you can again see the top of the sun. If you count the number of seconds (=t) until the sun fully ...
August 31, 2008 by john

Social Studies
How are these facts contribute to life on earth? *Gravity holds the sun together. *The sun is about 4.5 billion years old. *The sun is by far the largest object in the solar system.
September 12, 2011 by Frances

Science need help
Astronomers believe that the biggest stars in the Galaxy may be a hundred times more massive than the Sun, but are a million times brighter. Would you expect such stars to have longer, shorter or comparable lifetimes to that of the Sun?
December 21, 2012 by zak

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...
November 1, 2010 by Micah

Advanced Functions - Grade 12
Radiation from the sun keeps us alive, but with the thinning of the ozone layer, it is important to limit exposure. Most of us know that the sun is far more intense at the equator than at the poles. The relationship between the intensity of radiation with respect to the ...
July 20, 2010 by Nish

Physics
What is the average linear speed of Mercury about the Sun? (The distance from the Sun to Mercury is 5.80 1010 meters. The orbital period around the Sun is 88 days.)
October 9, 2007 by Dante

principles of physics
Calculate the force of gravity between Earth and the Sun (the Sun's mass = 2.0◊10^30 kg; average Earth-Sun distance = 1.5◊10^11 m).
March 9, 2012 by Kristie

Physics
2)Find the force of gravity between a tub of water (751.7 kg) and the Sun. The Sunís mass is 1.99 x 1030 kg and is 1.50 x 1011 m away. I'm guessing you multiple the sun's mass by 9.8(N/kg) .. then what?
October 31, 2009 by Anonymous

Physics
What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)
March 2, 2010 by Max

physics
What is the average linear speed of the Earth about the Sun? (The distance from the Sun to the Earth is 1.50 1011 meters. The orbital period around the Sun is 365.3 days.)
May 12, 2014 by caroline

math
If planet I is 31.8 million miles from the sun than planet II, then planet III is 25.6 million miles father from the sun than planet I. When the total of the distances for these three planets from the sun is 200.2 million miles, how far away from the sun is planet II? Planet ...
September 7, 2012 by Kelly

physics
Calculate the force of gravity between Earth and the Sun (the Sun's mass = 2.0◊10^30 kg; average Earth-Sun distance = 1.5◊10^11 m).
March 8, 2012 by jim

science
Im doing a science fair project on how fertilizer and sun effect the growth of grass
September 13, 2007 by bryan

Physics
The planet pluto travels once around the sun every 248 years at a mena distance from the sun of 5890x10^6 km. Find its orbital speed around the sun in (m/s).
December 26, 2010 by Anonymous

physics
The furthest distance from the Sun to Earth is df=1.521E8 The shortest distance from the Sun to Earth is ds=1.47E8 To simplify the problem, assume that the Earth's axis is always perpendicular to the plane of its trajectory around the Sun. The Sun always shines on half of the ...
June 9, 2013 by rishabh

QUICK! HELP! SCIENCE!
It's the kind of word that's at the tip of my tongue but I can't quite remember it. The bright, hazy light around the moon during a total solar eclipse is the sun's ( ). I've got to fill in that blank. I do remember that earlier it was described as a halo around the sun only ...
February 22, 2007 by Max

science
why does the sun appear to move westward across the sky during the day? a) because earth rotates to the east b) because earth rotates to the west c) because the sun moves in a westerly direction d) because of the way you are looking into the sky
October 30, 2013 by victoria

physics
the solar energy arriving at the outer edge of earth's atmosphere from the sun has intensity of 1.4 kW/msquared. how much mass does the sun lose per day? what percent of the sun's mass is this?
April 12, 2011 by Anonymous

physics
The sun radiates energy at the rate of 3.92x 10^26 W. (a) What is the change in the sun's mass in one second? (b)How much mass does the sun lose in the lifetime of your average earthling (say, 75 years)?
March 21, 2012 by daniela

physics
The sun radiates energy at the rate of 3.92x 10^26 W. (a) What is the change in the sun's mass in one second? (b)How much mass does the sun lose in the lifetime of your average earthling (say, 75 years)?
March 21, 2012 by daniela

Science
How does the temperature change in the sun's atmosphere differ from the temperature change in the sun's interior?
February 7, 2013 by Anonymous

science
How does the temperature change in the sun's atmosphere differ from the temperature change in the sun's interior?
February 23, 2013 by Stephanie

Science
How does the temperature change in the sun's atmosphere differ from the temperature change in the sun's interior?
March 4, 2013 by Anon

science
how is heliocentric(planets and Earth revolve around the sun) connected to science? math? the world? you? and y is it important?
April 20, 2008 by anonymous

Science
Do you know how big the Sun is? The Sun is 400 times as big as the Moon and 400 times as far away. The Moon: 2.5mm diameter a) How big would the Sun be if the Moon were the size shown above? b) The Sun is actually about 865,000 miles in diameter, so 1 cm of the model ...
January 9, 2009 by luca

physics
Halley's comet moves about the sun in an elliptical orbit with its closest approach to the SUn being .59AU and its greatest distance being 35AU (1AU=Earth-sun distance) if the comet's speed at closest approach is 54km/s what is its speed when it is farthest from the Sun? you ...
January 29, 2007 by cyndi

Astronomy
If we assume the Sun is made totally out of hydrogen, how many hydrogen atoms are contained with the Sun? If the Sun converts half of these hydrogen atoms into helium over its lifetime of about ten billion years, how many hydrogen atoms are converted per second? Mass of Sun = ...
November 22, 2011 by Kaitlyn

Physics
The sun goes around the center of our galaxy once every 250 million years. The sun is also†2.55◊10^20†m from the center of our galaxy. What is the acceleration of our sun towards the center of the galaxy in†m/s^2? Details and assumptions You may assume the sun's orbit is ...
March 22, 2013 by Jack

physics universal gravity
find the gravitaional force of the sun that acts on a 50 kg peron standing on earth. mass of the sun = 2E30 kg distance from sun to earth = 1.5E11 m radius of earth = 6.4E6 m
November 4, 2009 by Anonymous

Math
The period of revolution of a planet around the sun is the time it takes for the planet to complete one orbit of the sun. The period, P years, is give by Kepler's third law P^2=D^3, where D is the average distance from the sun in astronomical units (AU). One AU is the average ...
September 13, 2008 by Larry

physics
You are lying on the beach on a tropical island on the equator, watching the Sun set - what a beautiful scene! Immediately after the top of the Sun disappears, you stand up to watch the Sun set again. After the amount of time t=10 s the top of the Sun disappears again. Given ...
February 14, 2013 by Anonymous

Astronomy
Mass of the Sun = 1.989 x 10^30 kg Mass of Hydrogen Atom = 1.00794 grams If we assume the Sun is made totally of hydrogen, how many hydrogen atoms are contained within the Sun? If the Sun converts hald of these hydrogen atoms into helium over its lifetime of about ten billion ...
November 27, 2011 by Jobeth

Astronomy
1. Sun-grazing comet ISON disintegrated on November, 2013. Observation of the comet suggested an elliptical orbit with period 581,480 years. What would this predict for the distance from the Sun at the orbit’s aphelion, the farthest point from the Sun? Express your answer in...
December 9, 2013 by keitanako

Science ( the sun)
Is the sun a high mass star or a low mass star?
May 28, 2008 by Samantha

Science
According to science, the fastest speed posssible for anything is the speed of light. The speed of light is about 186,000 mies per second. That means taht in one minute, lighttravels 11,160,000 miles. The star nearest Earth is the Sun. It's about 93,000,000 miles from Earth. ...
July 8, 2012 by Rafi

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?
November 21, 2010 by Anonymous

Science
1. It is believed that in the Archeaneon (2.5-4 billion years ago) the sunís radiative output was 30% less than it is today. (i) What would the temperature of the sun have been at that time? (ii) At what wavelength would the peak emission from the sun have been? (iii) Ignoring...
January 23, 2010 by Sheena

physics
The radiation curve of the sun shows that the brightest light fro the sun is yellow- green. Why, then, do we see the Sun as whitish instead of yellow green?
December 8, 2007 by Matt

Physics
A planet with mass 7 x 1024 kg orbits a sun with a period of 1 Earth's years. The speed of the planet around that sun is constant and |v|=43000 m/s. What is the mass of that sun?
October 21, 2011 by JV

PHYSICS- SCIENCE
1. It is believed that in the Archeaneon (2.5-4 billion years ago) the sunís radiative output was 30% less than it is today. (i) What would the temperature of the sun have been at that time? (ii) At what wavelength would the peak emission from the sun have been? (iii) Ignoring...
January 23, 2010 by Sheena

astronomy
how far away is the sun in science notation? The distance of the earth from the sun varies from 9.1407905x10^7 miles to 9.4512780x10^7 miles with a mean distance of 9.2960242x10^7 miles. Many use 9.30x10^7 as the mean distance.
May 23, 2007 by chanel

physical science
The diameter of the sun makes an angle of .53 degrees from earth. How many minutes does it take for the sun to move one solar diameter in an overhead sky? ( Remember that it takes 24 hours or 1440 minutes for the sun to move through 360 degrees). How does your answer compare ...
June 27, 2005 by Jarrad Michael

REALLY EASY
Which of the following are a consequence of the Earth's yearly motion around the Sun? (check all that apply) 1.the Sun appears in different constellations in different seasons 2.the planets look different than stars 3.the Sun rises and sets 4.the Moon exhibits phases 5....
September 19, 2011 by Kristina

physical
An asteroid in an elliptical orbit about the sun travels at 3.9 106 m/s at perihelion (the point of closest approach) at a distance of 3.7 108 km from the sun. How fast is it traveling at aphelion (the most distant point), which is 8.6 108 km from the sun?
January 24, 2013 by ahmed

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

ALG/TRIG
Lost is an understatement..please help me understand this. Orbits and Distance Johannes Kepler (1571Ė1630)discovered a relationship between a planetís distance D from the sun and the time T it takes to orbit the sun. This formula is , where T is in Earth years and corresponds ...
March 6, 2012 by Lost

Atmospheric Science
1. What solar temp is needed for the peak intensity of radiation to occue at .2 micrometers? Remembering that humans can see light only between .4 and .7 microns, would the sun look brighter or dimmer at this new temp? 2. How much variation in earth orbital distance from the ...
September 11, 2014 by Rebekah

Physics
Use the following numbers for this question. MEarth 5.98e+24 kg MJupiter 1.9e+27 kg MSun 2e+30 kg Earth-Sun distance 150000000000 m Jupiter-Sun distance 778000000000 m rE 6380000 m rJ 69000000 m G = 6.67e-11 Nm2kg-2 the acceleration due to gravity at the surface of Jupiter has...
November 18, 2012 by Anonymous

Science, plz,plz help
Which of the following illustrates the energy changes taking place during photosynthesis? light energy from sun Ā® chemical energy in bonds of glucose chemical energy in bonds of glucose Ā® light energy from sun light energy from sun Ā® chemical energy in bonds of carbon ...
February 10, 2014 by Anonymous

science
The primary source of energy in our solar sysem is from? a) fusion reaction on the sun b) fission reaction on the sun c) fission reaction on the earth d) fission and fusion in the galaxy e) fusion reactions in comets the answer i picked was a
August 16, 2010 by babe

science
why the tilt of axis causes summer to be warmer than winter in the northern hemisphere i put because the rays of the sun strike the northern hemisphere more directly in the summer. but it could also be because northern hemisphere is closer to the sun in the summer.
March 31, 2013 by jeff

Science (college level)
1. What solar temp is needed for the peak intensity of radiation to occue at .2 micrometers? Remembering that humans can see light only between .4 and .7 microns, would the sun look brighter or dimmer at this new temp? 2. How much variation in earth orbital distance from the ...
September 12, 2014 by Jason

Science/Biology
Pick the BEST answer: A)Which Of The Following Is An "Excitable Cell"? <4>1) Neuron <3>2) Electron <4>3) Hormone <3>4) Both 1 & 2 <4>5) All Of The Above B)What Is The Popular Molecule That Energizes Many Activities In Cells? <4>1) Adenosine ...
December 11, 2007 by Biomed

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