Linear expansion is a change in length of
an object with temperature.
a. Write an equation for coefficient of
linear expansion?
b. Show that coefficient of volume
expansion is thrice its coefficient of linear
expansion.
c. Invar is used for making pendulum
clocks. Why?
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Answer:
93 billion light-years
The comoving distance from Earth to the edge of the observable universe is about 14.26 gigaparsecs (46.5 billion light-years or 4.40×1026 m) in any direction. The observable universe is thus a sphere with a diameter of about 28.5 gigaparsecs (93 billion light-years or 8.8×1026 m).
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