Answer:
yes i do becuase humans are here but by being here they disrupt the structure of plants and animals.
Explanation:
Some substances look alike and the density can help you determine which is which. It also helps to tell which is heavier than the other.
Mass is how heavy is it, weight is the size both are the same
Answer:
Part a)

Part b)
Ball thrown downwards =
Ball thrown upwards =
Part c)

Explanation:
Part a)
Since both the balls are projected with same speed in opposite directions
So here the time difference is the time for which the ball projected upward will move up and come back at the same point of projection
Afterwards the motion will be same as the first ball which is projected downwards
so here the time difference is given as



Part b)
Since the displacement in y direction for two balls is same as well as the the initial speed is also same so final speed is also same for both the balls
so it is given as




Part c)
Relative speed of two balls is given as


now the distance between two balls in 0.8 s is given as



Answer:
Spherical mirror is a mirror with a curved reflecting surface.