If the rate at which a pulsar is slowing down is found, this helps us find the time at which it was produced by the supernova

Indicate whether the statement is true or false


TRUE

Physics & Space Science

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The primary mirror in an astronomical telescope must be a

a. half-silvered mirror. b. convex mirror. c. concave mirror. d. plane mirror.

Physics & Space Science

Design a composite material made of epoxy and uniaxial E-glass fibers that has an axial thermal conductivity of 8 Wm-1 K-1 . The thermal conductivity of E-glass is 13 Wm-1 K-1 , and for epoxy it is 0.1 Wm-1 K-1 .

(a) What is the volume fraction of fibers and matrix in this composite? (b) What is the transverse thermal conductivity of this material?

Physics & Space Science

The most important property that determines the evolution of a star is its

A. composition. B. mass. C. temperature. D. location.

Physics & Space Science

Light passes from a material with index of refraction 1.1 into one with index of refraction 1.5 after being incident at a non-normal angle (?inc ? 0). Compared to the incident ray, the refracted ray will

1.be unaffected. 2.bend towards the normal. 3.follow the normal. 4.bend away from the normal.

Physics & Space Science