What contributions did Brahe and Kepler make to astronomy?
Space and AstronomyThese two colorful characters made crucial contributions to our understanding of the universe: Tycho’s observations were accurate enough for Kepler to discover that the planets moved in elliptic orbits, and his other laws, which gave Newton the clues he needed to establish universal inverse-square gravitation. What did Brahe contribute to astronomy? Brahe created detailed mathematical
How do you rotate a vector 90 degrees?
Space and AstronomyNormally rotating vectors involves matrix math, but there’s a really simple trick for rotating a 2D vector by 90° clockwise: just multiply the X part of the vector by -1, and then swap X and Y values. How do you rotate a 90 degree rule? The rule for a rotation by 90° about the origin
What is the difference between a trapezoid and a rhombus?
Space and AstronomyA trapezoid is a quadrilateral with at least one pair of parallel sides (called bases), while a rhombus must have two pairs of parallel sides (it is a special case of a parallelogram). The second difference is that the sides of a rhombus are all equal, while a trapezoid may have all 4 sides of
How are proper and regular subsets characterized?
Space and AstronomyAnswer: A subset of a set A can be equal to set A but a proper subset of a set A can never be equal to set A. A proper subset of a set A is a subset of A that cannot be equal to A. In other words, if B is a proper subset
What is the root word of Connect?
Space and Astronomymid-15c., “to join, bind, or fasten together,” from Latin conectere “join together,” from assimilated form of com “together” (see con-) + nectere “to bind, tie” (from PIE root *ned- “to bind, tie”). What is connect word? 1 : to join or fasten together usually by something intervening A highway connects the two towns. 2 :
What stages will the sun go through?
Space and AstronomyThe Sun is currently a main sequence star and will remain so for another 4-5 billion years. It will then expand and cool to become a red giant, after which it will shrink and heat up again to become a white dwarf. The white dwarf star will run out of nuclear fuel and slowly cool
What is the transpose of a vector?
Space and AstronomyThe transpose of a vector is vT ∈R1×m a matrix with a single row, known as a row vector. A special case of a matrix-matrix product occurs when the two factors correspond to a row multiplying a column vector. The result is in this case a single scalar. How do you find the transpose of
Why is the moon round in shape?
Space and AstronomyThey are not perfectly round, of course, but there is a tendency for them to be nearly spherical rather than some other shape, because of gravitational attraction. A finite number of uniformly distributed particles of the same size would be attracted to each other and tend to coalesce into a spherical lump. Why does the
How do you use a sliding caliper?
Space and AstronomyHow do you use a caliper step by step? Video quote: Within the walls of the mortise as shown adjust the vernier scale until the blades of the upper jaws are flat against the walls of the mortise. Tighten the thumbscrew to fix the position. How do you read a sliding caliper? Video quote: Reading
Which flowers turn towards the sun?
Space and AstronomyFloral heliotropism. Heliotropic flowers track the Sun’s motion across the sky from east to west. Daisies or Bellis perennis close their petals at night but open in the morning light and then follow the sun as the day progresses. Do all flowers face towards the sun? It has been suggested that cloudy days cause the