Sujet: earth liste de sujets
nouvelle recherche

39 articles trouvés pour ce sujet.

		Page 1/1

	More on the curvature of the Earth		2018-04-23
		will pose la question : the formula for figuring the earth's curve goes against logic, looking at a fixed point and backup 1mi. the point drops 8" then 16" in the next mi. and 32" in the third mi. why shouldn't it be 24" why is the 8" per mi. squared can you tell me in laymens terms why this is it goes against logic it would seem the correct wat would be to add up 8" per mile as you back up from the fixed point 8"- 16"- 24"- 32" not 8/16/32/64" Harley Weston lui répond.
	Distance between a chord and its arc on a circle		2018-03-23
		Doug pose la question : Specifically, what is the subject distance for the Earth orbiting for 27 days. Assume the orbit of the Earth to be a circle have a 93 million mile radius. Assume the angle of arc to be (27/365) x 360 degrees. Thank you. Penny Nom lui répond.
	Compressed Earth blocks		2016-03-02
		John pose la question : how many 14"x10"x4" blocks do I need for a 1300sq foot house 8 foot high Penny Nom lui répond.
	Prove the earth is round		2016-01-30
		Kevin pose la question : Working on a project for a science fair. To prove the earth is round without the ability to get way above the surface. How could we set up and experiment to see the curve. My thought is using a telescope at the beach? Form what we see so far the curve is 8 inches per mile? So thought is set up a telescope and a target 1 mile away? Robert Dawson and Chris Fisher lui répond.
	How much does the Earth curve over a one foot distance?		2015-11-24
		Sean pose la question : Hi, I am trying to figure out how much the earth curves over a one foot distance. I'd like to be able to draw the exact arc on a piece of paper. I am an artist and am looking to make glass vessels with the exact curvature of the earth. I read on your site that it curves approximately 8 inches per mile. can I just use simple ratios to break it down into inches?? Thank you so much for your help. Harley Weston lui répond.
	Curvature of the Earth		2014-12-29
		Jimmy pose la question : Both batteries died in my scientific calculator and I have lost my formula for the heigth of the curvature of the earth between two points on the surface. I used degrees and miles. I only had to enter the distance between the two points on the surface and the formula gave me the hieght the earth raised between the two points. Robert Dawson lui répond.
	An arc subtended at the center of the Earth		2014-07-20
		Abhinav pose la question : Meerut is 60 km from Delhi. Find the nearest second the angle subtended at the center of the earth by the arc joining these two points,earth being regarded as a sphere of 5940 km radius. Penny Nom lui répond.
	A triangle on the surface of the Earth		2014-06-26
		Christine pose la question : A, B and C are three towns, the bearing of B and C from A being 310 degrees and 220 degrees, and their distances from A are 510km and 700km respectively. Find the bearing of B from C to the nearest minute. Robert Dawson lui répond.
	A model of the sun and the Earth		2014-06-14
		Lynn pose la question : There is a model of the sun that is 2 1/2 inches in diameter. This is the only clue we have! How far away is the earth from this model? Penny Nom lui répond.
	Curvature of the Earth		2014-03-28
		Max pose la question : Recently I read the answer to a question proposed by someone on this site. The question : What is the rate of curvature per mile on Earth? The answer given : Use Pythagoras' Theorem to solve for the answer, given a 1 mile side and a side as the radius. The hypotenuse minus the radius is your answer of drop/mile or curve/mile. My conjecture : Why go through all of that work if the distance is one? Something like {1/diameter} would would fine for such a problem. Seems like a lot of work for no reason. I understand the practical application of Pythagoras' Theorem in this certain situation, as you would need to use a^2+b^2=c^2 for any distance greater than one [mile].. It just seems excessive and unnecessary if you're solving for curve / one mile. Robert Dawson lui répond.
	A cable around the Earth		2014-03-13
		fikile pose la question : By how much must an equatorial cable be extended in order that it runs 1meter above the ground? Penny Nom lui répond.
	If the earth was made of a ball of string		2013-09-18
		Tammy pose la question : My 9 year old son asked me a question and I have no idea how to work it out! Please can you help? If the earth was made of a ball of string and you unravelled the string how long would it be? Assuming the string is 5mm thick. Penny Nom lui répond.
	The curvature of the earth		2012-02-08
		sean pose la question : Question from sean, a student: Two people 1.8 metres tall walk directly away from each other until they can no longer see each other (due to the curvature of the earth, which has a radius of about 6378 km). A) Find a function relating the height of two identical objects with the distance between them using the scenario above as an example. B) Sketch this function (you may use Graphmatica if you wish). Over what domain and range does the function exist? C) Describe this relation in practical terms. Harley Weston lui répond.
	A tangent to the earth		2011-09-03
		Vickram pose la question : I have a math problem regarding tangent and circle. My example is as follows: if a long flat ruler measuring 1500 miles is placed on top of earth which has a radius of 3960 miles what part (length) of the tangential ruler will actually be touching the earth and what two parts will not? Chris Fisher lui répond.
	The volume of earth to be moved		2010-07-29
		Michael pose la question : Volume of earth moved @ 500' across, 1 to 3 degree slope, 30' deep X 50' across at the bottom. Stephen La Rocque and Harley Weston lui répond.
	Curvature of the Earth		2010-05-29
		grant pose la question : if you have 2 plumb structures 10ft. tall, how far apart will they be when they are 1 inch out of parallel at the top Tyler Wood lui répond.
	Line of sight		2010-05-06
		David pose la question : I live in St. Joseph, Michigan and there is an ongoing argument regarding line-of-sight over the horizon. Standing on a 200 foot high bluff here, people swear they can see the top of the Willis (nee Sears) Tower in Chicago, which is about 1653 feet high. It is my contention that this is actually a "refracted reflection" and not direct-line-of-sight. So, to settle the argument, I'd sure like some simple explanation for this, even if-and I hope not-I am incorrect. David Harley Weston lui répond.
	If the earth were covered completely with water		2010-02-25
		don pose la question : If the earth were covered completely with water (over Everest) how many gallons would it be?? Penny Nom lui répond.
	Everything in a cube 2 miles long?		2010-01-31
		Naresh pose la question : in a book, i got to read this : Is it possible to pack the entire population of earth and everything that was created by humankind in a cube whose edges are 2 miles long ? Is it possible? Thanks. Stephen La Rocque lui répond.
	A string around the world		2008-08-18
		Terry pose la question : I heard this on T.V. and was wondering if it was true. Place a string around the world, you would need 25,000 miles of string. If you raised the string off of the ground by 1 foot all the way around. How much more string would you need? Penny Nom lui répond.
	The weight of a cubic yard of dirt		2008-07-21
		Robert pose la question : I need to know how many pounds of dirt is in a cubic yard Penny Nom lui répond.
	How far away is the horizon?		2008-06-13
		Ali pose la question : A plane is 10km above the earths surface, and you want to know how far away the horizon is, you know that the radius of the earth is about 6400km, how far away is the horizon along the earth's curved surface. My teacher has drawn a diagram; a circle representing the earth with one vertex at the center of the earth, another vertex outside the cirlce representing the plane (the distance between the earth and plane is 10km) and the last one is on the circle representing the horizon. Could you please explain how I would solve this problem, thanks! Penny Nom lui répond.
	Throwing a ball on the moon		2008-05-21
		leria pose la question : equation for motion of moon is h=2.67t^2 + vt + s equation for earth h=-16t + vt + s Suppose you are on an outpost on the moon and Jan is back on Earth. Both people toss a ball from a height of 96 feet with an initial velocity of 16 feet per second. How much longer will your ball stay in motion on the moon than Jan's on the earth? Math Central, I'm having a difficult time understanding which numbers to plug into the formula. Stephen La Rocque lui répond.
	Distance seen		2008-03-18
		Nev pose la question : formule: Distance Seen S = 1.225 x square root of H S = Distance seen in Miles H = Height in Feet What dose 1.225 Relate To ? Stephen La Rocque lui répond.
	The distance to the moon from earth		2006-05-19
		Maira pose la question : Using trigonometric functions first, show how to find the distance to the moon from earth and then find the radius of the moon. Stephen La Rocque lui répond.
	How far from Earth is Neptune?		2006-03-21
		Scott pose la question : A laser beam travelling at the speed of light bounces off the planet Neptune and returns to Earth in 29 960.72 s. The speed of light is 299 792.5 km/s. How far from Earth is Neptune? Penny lui répond.
	The volume of the earth in gallons		2005-08-18
		Daniel pose la question : I would like to know how to find the volume of the Earth in gallons. Penny Nom lui répond.
	Difference in latitude		2005-04-05
		Gretel pose la question : Assuming the the earth is a sphere of radius 6378 kilometers, what is the difference in latitude of two cities, one of which is 400 kilometers due north of the other? 500 kilometers? Penny Nom lui répond.
	How far can you see?		2003-12-15
		Judy pose la question : How far apart, assuming no obstacles, can two people stand and still see each other? i know this deals with the curvature of earth, but i can't figure out the formulas involved. Chris Fisher lui répond.
	The volume of an earthen pit		2003-09-12
		Bruce pose la question : This shape would occur at the four corners of a rectangular shaped earthen pit with sloping sides (1:1.5). Depth is 14'. Top dimensions are 170' by 158'. After calculating the easy volume components of this shape, we are left with the end corner pieces. 21' base, 14' height, side hypotenuse 25.24' and corner diagonal 32.83'. We're confused. Thank you for any help you may provide. Penny Nom lui répond.
	Hidden by the curvature of the Earth		2003-04-23
		Shirley pose la question : There are 2 six foot men. What would the distance be between them before one could not be seen because of the curvature of the earth? Penny Nom lui répond.
	Wrap a rope around the equator		2003-02-12
		Ali pose la question : If you take a rope and wrap it around the equator and then overlap it 6ft. and cut off the extra then you loosen it up so the ends meet how far would it stand off the ground? Penny Nom lui répond.
	The entire earths' population would fit in the state of Texas		2002-09-18
		Roz pose la question : I have been told that the entire earths' population would fit in the state of Texas and each person would have 1/2 acre. Is this true. Chris Fisher lui répond.
	Ratios and weights on Neptune		2002-06-03
		Janice pose la question : The ratio of an object's weight on earth to it's weight on Neptune is 5:7. How much would a person who weighs 150 pounds on earth weigh on Neptune. Penny Nom lui répond.
	When will the ship disappear?		2001-10-10
		Stacy pose la question : If the sail of a ship were a 100 ft. tall and you were a mouse at the edge of the shore looking out at it, how far out would the ship be when it disappears? ( your eye level is level with the water.) Harley Weston lui répond.
	Earthquake warning		2001-09-03
		Dillon pose la question : In the city of Skangai there are 6 million people.Each person has to tell 2 more people that theres going to be an earthquake. After they do they leave the city. There will be no duplications.It takes 3 minutes to tell each person. How long will it take for the whole city to know about the earthquake? Penny Nom lui répond.
	Mass of the earth		2000-02-21
		Terry Broughton pose la question : My name is terry i am 15 my question is how much does our planet earth weigh ? Chris Fisher and Harley Weston lui répond.
	Curvature of the Earth		1998-03-16
		Robert Dyck pose la question : How can I find the curvature per mile of the earths surface? What is it? Harley Weston lui répond.
	The Earth's Arc		1998-02-06
		Robert Dyck pose la question : How do I find the arc/mile of the earths surface? What is the arc? Harley Weston lui répond.

		Page 1/1