The dark maria on the moon are
A) layers of dark meteoritic debris from impacts
B) layers of darker rock just beneath the surface which have been uncovered by impacts
C) huge impact basins filled in by lava flows
D) oceans of liquid water covering the surface
Question 2
If the inductance and the capacitance both double in an LRC series circuit, the resonant frequency of that circuit will
A) decrease to one-half its original value.
B) decrease to one-fourth its original value.
C) decrease to one-eighth its original value.
D) increase to twice its original value.
E) increase to four times its original value.
Synaptic response of photoreceptors to dark and light.
Far side of the Moon
Earth and the Moon
Environmental impacts vary with the stage of mining
The Two Layers of the Skin
Maria - Blondie