Which of the following is not generally used in mineral identification?
a. Size
b. Cleavage
c. Specific gravity
d. Color
a
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The Sun makes most of its energy by the proton-proton cycle
a. True b. False Indicate whether the statement is true or false
An experiment that can be used to measure the velocity of a bullet is to have two cardboard disks attached to a rotating shaft some distance apart and to measure the angular separation of the holes made by the bullet
In such an experiment, two cardboard disks are placed 0.534 m apart on a shaft that is rotating at 3000 rpm. The bullet is fired parallel to the axis and the angular separation of the holes is measured to be 22.0°. What is the speed of the bullet? A) 72.8 m/s B) 139 m/s C) 219 m/s D) 437 m/s E) 1380 m/s
The dynamo effect is believed to produce the ____________________ of the sun
Fill in the blank(s) with correct word
A charged comb attracts bits of neutral dust in the air. This happens because
A. the dust becomes polarized. B. the dust is a good conductor. C. the dust becomes charged by induction. D. the dust grounds the comb.