The type of volcanic material that may plug a
volcanic vent causing a buildup of pressure that
can result in an explosive eruption is composed
of
a) high-pressure gases.
b) low-silica lava.
c) high-silica lava.
d) volcanic bombs.
c
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White dwarfs are rare objects
a. True b. False Indicate whether the statement is true or false
In a relay race, runner A is carrying the baton and has a speed of 2.80 m/s. When he is 25.0 m behind the starting line, runner B starts from rest and accelerates at 0.0800 m/s2. How long afterwards will A catch up with B to pass the baton to B?
A) 5.17 s B) 10.5 s C) 11.9 s D) 20.4 s E) Runner A never catches up.
A deuteron is captured by an oxygen-16 atom which in turn emits a proton. What is the element and mass number of the product isotope?
a. oxygen-15 c. nitrogen-15 b. fluorine-15 d. oxygen-17
A pair of hydrogen nuclei fused together produces
A) helium. B) lithium. C) beryllium. D) carbon. E) iron.