Which of the following would be the closest estimate to the number of times the Sun has orbited the galactic center?
a. 1
b. 10
c. 25
d. 50
e. 100
a
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A container having a volume of 1.0 m3 holds 5.0 moles of helium gas at 50°C. If the helium behaves like an ideal gas, the average kinetic energy per molecule is
A. 6.7 × 10?20 J. B. 1.0 × 10?21 J. C. 1.0 × 10?20 J. D. 6.7 × 10?21 J. E. 1.3 × 10?20 J.
A 100-kW radio station emits EM waves in all directions from an antenna on top of a mountain. What is the intensity of the signal at a distance of 10 km?
a. 8 × 10^-5 W/m2 b. 8 × 10^-6 W/m2 c. 3 × 10^-3 W/m2 d. 0.8 W/m2 e. 2.5 × 10^-5 W/m2
All planets revolve around the Sun counterclockwise, and most also rotate on their axis counterclockwise
Indicate whether the statement is true or false
All organisms have finite lifetimes and eventually die. Which of the basic characteristics of life corrects for this?
A) energy utilization B) response to the environment C) evolutionary adaptation D) reproduction