The main causes of convection currents in the asthenosphere is A. <span>density and temperature. Convection currents are formed from gradients such as concentration and temperature gradients. Density is the one closely related to concentration gradient. Answer hence is A></span>
The first law, which deals with changes in the internal energy, thus becomes 0 = Q - W, so Q = W.
If the system does work, the energy comes from heat flowing into the system from the reservoir; if work is done on the system, heat flows out of the system to the reservoir
The distance is how far he walks. It doesn't matter where he starts or ends. That's 1 mile, every day. Displacement is the length of a straight line from the start point to the end point. The route along the way doesn't matter. That's zero every day ... Ike starts and ends at his front porch.
Answer:All are correct
Explanation:
All the given option is correct as the relation between load w,shear force V, and bending moment M is
and 
Also the Shear at a section is equal to previous section plus the total load between two required section .
Same is true for Bending Moment
