why did it take astronomers until 1838 to measure the parallax of stars?
What will be an ideal response?
because the stars are so far away that their annual shift of position in the sky is too small to see without a telescope
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Which event marks the birth of a star?
A) Formation of the planetary nebula B) Fusion of hydrogen atoms into helium atoms C) Collapse of an interstellar cloud D) Formation of a photosphere E) Instability in an interstellar cloud
Bats can detect small objects such as insects that are of a size approximately that of one wavelength. If bats emit a chirp at a frequency of 60 kHz, and the speed of sound in air is 340 m/s, what is the smallest size insect they can detect?
Solve the system of equations
GIVEN
A system of three equations
FIND
(a) The solution of the system of equation using Jacobi and Gauss-Seidel iteration
If a piece of wood is suspected to be several thousand years old, its true age can likely be determined through use of the isotope _________
Fill in the blank(s) with correct word