The flywheel of a machine is rotating at 126 rad/s. Through what angle will the wheel be displaced from its original position after 6.0 s?
A) 21. radians
B) 7.3 × 102 radians
C) 1.2 × 102 °
D) 0.32 revolutions
E) 7.3 × 10-2 revolutions
D
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The islands of Hawaii were created by
A) thin continental crust separating and creating a rift valley. B) plumes of hot mantle rising in a hot spot within a plate. C) plates that have slipped sideways relative to each other, creating a fault. D) a plate that has run up against an existing continental plate. E) a fault.
Which of the following stellar properties has the greatest range in values?
A) mass B) radius C) core temperature D) surface temperature E) luminosity
The ancient Greeks get a lot of attention for their contributions to science because
A) they were the first people known to try to explain nature with models based on reason and mathematics, without resort to the supernatural. B) the books of every other culture were lost in the destruction of the library of Alexandria. C) they were the first people to realize that Earth is a planet orbiting the Sun. D) they were the only ancient culture that kept written records of their astronomical observations.
The energy used by a 100 watt light bulb in 1 hour is 360,000 joules
Indicate whether the statement is true or false