The physical characteristic that is used to distinguish intrusive igneous rocks from extrusive igneous rocks is ______________
Fill in the blank(s) with correct word
texture, or grain size
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On the H-R diagram, the Sun lies
A) about the middle of the main sequence. B) at the top left. C) at the bottom right. D) at the bottom left. E) at the top right.
A tuning fork is sounded above a resonating tube (one end closed), which resonates at a length of 0.80 m and again at 1.40 m. What is the frequency of the fork when the speed of sound is taken to be 340 m/s?
a. 243 Hz b. 155 Hz c. 425 Hz d. 567 Hz e. 748 Hz
A particle starts from rest at xi = 0 and moves for 10 s with an acceleration of +2.0 cm/s2 . For the next 20 s, the acceleration of the particle is ?1.0 cm/s2 . What is the position of the particle at the end of this motion?
a. zero b. +3.0 m c. ?1.0 m d. +2.0 m e. ?3.0 m
Unpolarized light is passed through polarizer 1 . The light then goes though polarizer 2 with its plane of polarization at 30.0° to that of polarizer 1 . Polarizer 3 is placed after polarizer 2 . Polarizer 3 has its plane of polarization at 30.0° to the plane of polarization of polarizer 2 and at 60.0° to that of polarizer 1 . What fraction of the intensity of the original light gets though
the last polarizer? a. 0.707 c. 0.281 b. 0.125 d. 0.553