Ageologist studies rocks. which of earth's spheres would a geologist be most interested in? atmosphere biosphere hydrosphere lithosphere

When a geologists studies the rock, he must be interested in lithosphere, the sphere of Earth which has the rock.  

Option D

Explanation:

Lithosphere is the sphere with the rock and soil component, broadly speaking the land. Lithosphere is the sphere where the rocks are present above the mantle (upper mantle) and the crust.

They had the rock which are solid in state and are consider to be of elastic nature with low ductility. There are broadly two main categories based upon the location of their presence, which are oceanic and continental.

when a device is used in a circuit in which the voltage is 81 v, the current flowing through the device is 3 a. what is the resistance of the device?

a. 27 ω

b. 40.5 a

c. 243 ω

d. 243 a

the correct answer is a. 27

the duration of a photographic flash is related to an rc time constant, which is 0.100 μs for a certain camera.