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	The angle of a countersunk screw		2020-01-19
		Barbie pose la question : I need to be able to verify the angle used for the head of a countersunk screw. I have the diameter of the head, diameter of the shank and height between the two. I assume it would be considered a frustum. For example: A standard 90 degree metric flat head screw in an M2 diameter has a head diameter of 3.65mm, the actual thread diameter is 1.98mm and the height of the head is 1.20mm. How can I prove that it is a 90 degree angle? Harley Weston lui répond.
	Two sunflowers		2015-03-12
		Maurice pose la question : Sam and sally planted two sunflowers.Each sunflower grows 1cm each day. Sally's sunflower is 4cm high. Sam's is 12cm high. How high will each sunflower be when Sam's sunflower is twice the height of Sally's? Penny Nom 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.
	The angular elevation of the sun		2012-07-14
		VINEET pose la question : WHAT IS ANGULAR ELEVATION OF THE SUM Penny Nom lui répond.
	Angle of elevation		2010-12-10
		PANKAJ pose la question : angle of elevation of the sun perpendicular72 and base 88 find angle Penny Nom lui répond.
	A sundial on an elliptical cylinder		2009-07-22
		Leo pose la question : I want to build a sundial where the shadow falls on an elliptical cylinder. I can calculate the coordinates of the points on the cylinder that I want to mark. My problem is that I will have to make the surface as a flat sheet and bend it into an elliptical shape. However, I cannot work out a scheme to transfer the coordinates I know into a distance that will work when I bend the shape. Help! Robert Dawson lui répond.
	Speed of sunrise		2007-09-04
		Robert pose la question : Facing west in a car, you are watching the sun rise (through the rear view mirror). It peaks the horizon, you take off driving. How fast would you have to drive, to see it rise again? Stephen La Rocque lui répond.
	Two puzzles		2004-07-13
		Fred pose la question : A young man's car developed a flat tire while he was driving along a deserted street. He pulled over to the curb and did all the usual things; removed the hub cap; unscrewed the lugs and rested them carefully in the hub cap, jacked up the car. As he was putting the spare tire onto the axle he accidentally kicked the hub cap. The lugs rolled out, and all five of them rolled down a nearby grate. Peering through the bars of the grate the man thought he could see the lugs about 6 feet below in a shallow water puddle. He had a problem, how do you think he solved it? It is noon, your lunch hour, but you can not go out because there is a terrific hailstorm. Turning on your radio you hear the weathercaster predict that the hail will change to rain and that it will pour all day today. How can you determine the sun will be shining in 36 hours? Justify your answer. Penny Nom lui répond.
	Sunshine?		2003-07-11
		lori pose la question : It is noon, your lunch hour, but you cannot go out because there is a terrific hailstorm. Turning on your radio you hear the weathercaster predict that the hail will change to rain and that it will pour all day today. How can you determine whether the sun will be shining in 36 hours? Claude Tardif lui répond.
	Sunflower seeds		2000-10-09
		A parent pose la question : Find the number of 3/4 pound of sunflower seeds that can be filled with 225 pounds of sunflower seeds Penny Nom lui répond.
	Why counterclockwise?		2000-02-21
		Drew pose la question : Why do the numbers of quadrants in a graph increase in a counter clockwise pattern? Why aren't they numbered increasingly in a clockwise pattern? Chris Fisher lui répond.
	The diameter of the sun.		1996-10-29
		Lynda Mow pose la question : What is the process for solving the following question? As viewed from earth, the sun subtends an angle of approx 32'. If the sun is 93,000,000 miles from earth, find the diameter of the sun. Penny Nom lui répond.

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