The smelting of a metal

(a) Raises the temperature above the melting point.
(b) Separates the metal from the ore.
(c) Deforms the metal into a shape.
(d) Cools the metal very rapidly from a high temperature.


(b) Separates the metal from the ore.

Physics & Space Science

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Intensity: Which one of the following expressions is the correct representation for the speed of light in vacuum?

A.
B.
C.
D. 1 / 
E. 1 / ?0?0 

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Comparing Mercury to the Earth's Moon:

A. Mercury is more than 100 times the mass of Earth's Moon. B. Mercury is only about 1/100th the mass of Earth's Moon C. they both take the same time to complete one orbit around the Sun. D. they both have little atmosphere and a similarly cratered surface. E. Since Mercury has so many active volcanoes, the craters on its surface have almost all been wiped away, while the Moon's craters remain.

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When the velocity and acceleration of an object have the same sign, the speed of the object increases

Indicate whether the statement is true or false

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The ________ track is the path the star takes on the H-R diagram as it ages

Fill in the blank(s) with correct word

Physics & Space Science