Suppose that, for some unknown reason, the core of the Sun suddenly became hotter and the rate of nuclear fusion thereby increased. What would happen next?
A) The Sun would quickly run out of hydrogen, causing the temperature to return to its original value.
B) The rate of fusion would almost instantly skyrocket, causing the Sun to explode.
C) The temperature would continue to increase, causing higher and higher fusion rates.
D) The core would expand, reducing the pressure and temperature, and the rate of fusion would decrease until it returned to its original level.
D) The core would expand, reducing the pressure and temperature, and the rate of fusion would decrease until it returned to its original level.
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In the field, you find an unidentified mineral that is clear, exhibits conchoidal fracture, and can scratch glass. This mineral is most likely:
-gypsum. -calcite. -quartz. -hornblende. -muscovite.
A batter applies an average force of 8000 N to a baseball for 1.1 ms. What is the magnitude of the impulse delivered to the baseball by the bat?
What will be an ideal response?
What makes a particle strange?
a. It can spontaneously change its charge. b. Its mass is too small to compare to other particles. c. Its mass is too large to compare to other particles. d. It decays at an inexplicably fast speed. e. It lasts much longer than expected.
Check all that are functions of the cerebellum.
A. Receives sensory plans for movements B. Acts as the "principal" of unconscious physical actions by regulating functions of motor pathways C. Directly controls the influences of hormones and enzymes on skeletal muscles D. Indirectly affects the excitability of motor neurons