Briefly describe cinder cones
Cinder cones are small, steep-sided volcanoes, and are made up of particles resembling cinders. They form when pyroclastic materials accumulate around a vent from which they erupted. Many have a large, bowl-shaped crater, and if they issue any lava flows, they usually break through the base or lower flanks of the mountains.
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A 10-kg brick and a 1-kg book are dropped in a vacuum. Gravitational force on the 10-kg brick is
A. 10 times the force on the 1-kg book. B. the same as the force on the 1-kg book. C. zero. D. 5 times the force on the 1-kg book.
The half-life of I-131 is 8.00 days. If a medical treatment involves a dose of 400. mg of I-131, how much of the isotope remains after 32.0 days?
A) 200. mg B) 100. mg C) 50.0 mg D) 25.0 mg
Demand for health care and education has grown because
A) the aging baby boomers demand more health care services. B) increasingly sophisticated technology requires that workers be better educated. C) these services are so inexpensive. D) all of the above. E) A and B only.
Features associated with ancient continental rift zones include andesite volcanoes and strike slip faulting.
a. true b. false