Answer:
physical change
Explanation:
its only changing things you see.
By pollution rotting the air and making is worse for us to breath
I believe gamma decay but i may be wrong
Answer:
Yes it is possible
Explanation:
When two equal magnitude forces are acting on the rod in opposite direction
Then the net force on the system is always zero in that case
so we will have

now for the system net torque due to these forces is given by

here we know that
= distance of the forces from reference about which torque is measured
so here we can say that net force is zero on the system while torque is not zero
in all such case object will rotate about a fixed position with change angular speed
Answer:
First one, third one, and fourth one