The East African rift zone was formed by
A) two pieces of continental crust separating
B) two pieces of oceanic crust colliding
C) two pieces of continental crust colliding
D) pieces of oceanic and continental crust colliding
A
You might also like to view...
If I0 = 10?12 W/m2 is the threshold of hearing, a sound with intensity I1 = 10?11 W/m2 will give a certain decibel level. Suppose a new sound has an intensity I2 = 2I12/I0 . What is the new decibel level?
a. 2.3 dB b. 23 dB c. 100 dB d. it will square the decibel level e. 1.0 dB
An ideal heat engine can have an efficiency of 1 if the temperature of the low temperature reservoir is
a. 0 K. b. 0°C. c. 0°F. d. 0°R. e. the same as the temperature of the heat source.
The moment reaction at A in the plane frame below is approximately:
(A) +1400 N?m
(B) 22280 N?m
(C) 23600 N?m
(D) +6400 N?m
When an electron transitions from a higher orbital level to a lower orbital level, a photon is ______
a. absorbed b. transitioned to somewhere else in that same orbit c. emitted d. None of the other choices are correct as a photon is not a product of or source to the transition.