The Tertiary is a(n)
a. epoch.
b. era.
c. eon.
d. period.
d
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A rod of 2.0-m length and a square (2.0 mm × 2.0 mm) cross section is made of a material with a resistivity of 6.0 × 10^?8 ? / m. If a potential difference of 0.50 V is placed across the ends of the rod, at what rate is heat generated in the rod?
a. 3.0 W b. 5.3 W c. 8.3 W d. 1.3 W e. 17 W
A 4.00 kg ball is moving at 2.00 m/s to the SOUTH and a 6.00 kg ball is moving at 2.00 m/s to the NORTHWEST. The total momentum of the system is
A. 15.8 kg m/s at an angle of 3.27 degrees NORTH of WEST. B. 8.5 kg m/s at an angle of 3.27 degrees NORTH of WEST. C. 15.8 kg m/s at an angle of 17.2 degrees NORTH of WEST. D. 8.5 kg m/s at an angle of 17.2 degrees NORTH of WEST. E. 20.1 kg m/s at an angle of 27.5 degrees NORTH of WEST.
T Tauri stars are never seen in old star clusters.
Answer the following statement true (T) or false (F)
The lunar mare are found
A) uniformly all over the Moon. B) only in the dark areas of the lunar poles, where water is not boiled away. C) mainly on the near side. D) mainly on the far side. E) only as layered rocks, since the original water was lost long ago.