In a magma pocket, under the earth's crust where the crust is thin
Answer: The net force is negative, The net force is positive, There is change in motion.
When an balanced force acts, there is change in motion. In case of balanced forces, the object does not change its motion. The unbalanced force causes change in the momentum of the object. There would be some net force. It would not be zero. The net force is zero when the acting forces are balanced. The net force in case of unbalanced forces have certain magnitude and are positive or negative depending on the direction. The positive and negative sign denotes direction of the net force.
During a single replacement, the Zn and H will switch places. That means the product formed will be ZnCl and H2.
Probably because summer has a less chance to have cloudy and cold days rather than having hot days and how the sunsets and rises. And Global Warming has an effect on summer more (And making winters hotter too but still).