Why do some igneous rocks have no crystals at all?

What will be an ideal response?


If they harden immediately with no time for minerals to align

Physics & Space Science

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Observer A sees a pendulum oscillating back and forth in a relativistic train and measures its period to be TA. Observer B moves together with the train and measures the period of the pendulum to be TB. These two results will be such that

A) TA > TB. B) TA = TB. C) TA < TB. D) TA could be greater or smaller than TB depending on the direction of the motion.

Physics & Space Science

Material replacement is one solution to mineral resource depletion

What will be an ideal response?

Physics & Space Science

A swimmer swims 20 laps in a north-south facing pool in 7.00 minutes. Her first lap is toward the north. Her displacement and average velocity are

a. 0; 0. b. 0; 2.38 m/s, south. c. 0; 2.38 m/s, north. d. 1 000 m, south; 2.38 m/s, south. e. 1 000 m, north; 2.38 m/s, north.

Physics & Space Science

Determining your website's target audience's wants, needs, and expectations is generally a one-time process.

Answer the following statement true (T) or false (F)

Physics & Space Science