a) On the vernal equinox, the Sun's DEC is twelve hours and its RA is zero degrees. b) The distances between the Earth and other planets is commonly given in units of parsecs. c) A comet is a streak of light that is seen in the sky when a space rock vaporizes. d) Earthshine occurs when light that travels from the Sun to the night side of the Earth is reflected to the night side of the Moon and then back to the Earth. e) If you want to observe the entire celestial sphere every night, go to the South Pole.
Displacement, Velocity and Acceleration
In classical mechanics, kinematics deals with the motion of a particle. It deals only with the position, velocity, acceleration, and displacement of a particle. It has no concern about the source of motion.
Linear Displacement
The term "displacement" refers to when something shifts away from its original "location," and "linear" refers to a straight line. As a result, “Linear Displacement” can be described as the movement of an object in a straight line along a single axis, for example, from side to side or up and down. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Non-contact sensors such as LVDTs and other linear location sensors can calculate linear displacement. Linear displacement is usually measured in millimeters or inches and may be positive or negative.
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