The Mesozoic era began about how many million years ago?
a. 3
b. 545
c. 245
d. 65
c
You might also like to view...
Consider star C, a measly 3000 K star, and star D, an impressive 9000 K star. Assuming they are about the same size, how do their luminosities compare?
A: Star D is 3 times as luminous as star C. B: Star D is 4 times as luminous as star C. C: Star D is 9 times as luminous as star C. D: Star D is 16 times as luminous as star C. E: Star D is 81 times as luminous as star C.
In a nuclear power plant, the reactor produces 500°C steam that is used to power the steam turbines which generate 1500 MW of electrical power. The cooling tower eliminates the waste heat at 50°C. If the efficiency of the plant were that of a Carnot engine, at what rate would waste heat be vented to the atmosphere?
Charge of uniform density (80 nC/m3) is distributed throughout a hollow cylindrical region formed by two coaxial cylindrical surfaces of radii 1.0 mm and 3.0 mm. Determine the magnitude of the electric field at a point which is 4.0 mm from the symmetry axis
a. 7.9 N/C b. 10 N/C c. 9.0 N/C d. 8.9 N/C e. 17 N/C
The climate of northwestern Europe is greatly affected by the
A) Kuroshio current. B) Gulf Stream. C) trade winds. D) jet stream.