A 1500-W heater is connected to a 120-V line. How much heat energy does it produce in 2.0 hours?
A) 1.5 kJ
B) 3.0 kJ
C) 0.18 MJ
D) 11 MJ
E) 18 MJ
D
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Sediments are classified according to the source of their constituents into two main groups. One is chemical. What is the other?
a. Physical b. Clastic c. Detrital d. Inorganic
Which of the following correctly describes the conditions under which you will feel weightless, according to general relativity?
A) any time you are traveling through space at constant speed B) any time your worldline is perfectly straight C) any time your worldline is following the straightest possible path through spacetime D) any time you are very far from any planet E) You can never be truly weightless.
The end stage of the life cycle of an extremely high-mass star is a
a. quasar. b. neutron star. c. black hole. d. white dwarf.
A cold region of dust which scatters the light of nearby stars produces a nebula which appears ________ in color, such as the one encompassing the Pleiades cluster
Fill in the blank(s) with correct word