on April 22, 2022
What is line and plane?
Space and AstronomyUnlike a plane, a line in three dimensions does have an obvious direction, namely, the direction of any vector parallel to it. In fact a line can be defined and uniquely identified by providing one point on the line and a vector parallel to the line (in one of two possible directions). What is a
on April 22, 2022
What did Leibniz built?
Space and AstronomyStep Reckoner, a calculating machine designed (1671) and built (1673) by the German mathematician-philosopher Gottfried Wilhelm von Leibniz. What is Leibniz most famous for? Gottfried Wilhelm Leibniz (b. 1646, d. 1716) was a German philosopher, mathematician, and logician who is probably most well known for having invented the differential and integral calculus (independently of Sir
on April 22, 2022
How do you calculate LxWxH?
Space and AstronomyMultiply the length (L) times the width (W) times the height (H). The formula looks like this: LxWxH For this example, to calculate the volume of the object the formula would be 10 x 10 x 10 = 1,000 cubic inches. What is the formula for LxWxH? Use multiplication (V = l x w x
on April 22, 2022
How do you prove a trapezoid is a trapezoid?
Space and AstronomyHow do you prove that ABCD is a trapezoid? Use the slope formula to find the slope of the sides of the quadrilateral. The slopes of exactly one pair of opposite sides are equal, so they are parallel. Therefore, quadrilateral ABCD is a trapezoid. How do you know if something is a trapezoid? A trapezoid,
on April 22, 2022
What is a star’s temperature?
Space and AstronomyThe surface temperatures of A-type stars range from 7,400 K to about 10,000 K; lines of hydrogen are prominent, and these stars are white. F-type stars are yellow-white, reach 6,000–7,400 K, and display many spectral lines caused by metals. Are stars Hot or cold? Red stars are the coolest. Yellow stars are hotter than red
on April 22, 2022
Are moon and sun planets?
Space and AstronomyThe sun and moon are not planets when you consider the objects in space they orbit. For the sun to be a planet, it would have to orbit another sun. Although the sun is in a orbit, it moves around the center of mass of the Milky Way galaxy, not another star. Is sun a
on April 22, 2022
How many cubic feet is an 8 inch pipe?
Space and AstronomySince you want cubic feet, you must first convert your measurements all to feet: 8 inches = (2/3) feet. Now get the radius: that’s (1/2)(2/3) = (1/3) feet. On my calculator, I get 3.49 cubic feet. Stephen La Rocque. How do you calculate cubic feet of a pipe? For a pipe use its length instead
on April 22, 2022
What is a central triangle?
Space and AstronomyWhat is central triangle in math? In geometry, a triangle center (or triangle centre) is a point in the plane that is in some sense a center of a triangle akin to the centers of squares and circles, that is, a point that is in the middle of the figure by some measure. What is
on April 22, 2022
How do you find the sine of a triangle?
Space and AstronomyIn any right angled triangle, for any angle: The sine of the angle = the length of the opposite side. the length of the hypotenuse. The cosine of the angle = the length of the adjacent side. the length of the hypotenuse. The tangent of the angle = the length of the opposite side. the
on April 22, 2022
What has only a trivial solution?
Space and AstronomyThe solution x = 0 is called the trivial solution. A solution x is non-trivial is x = 0. The homogeneous system Ax = 0 has a non-trivial solution if and only if the equation has at least one free variable (or equivalently, if and only if A has a column with no pivots). What