It is a Physical Change, because the water and the salt kept their original properties. I hope this helps! :) Have a great day!
Answer:
b)
movement creates a difference in air pressure.
as warm air rises up it creates a vaccum so due to that the pressure in that region decreases.
Answer:
the net work done on the cart is 160 J.
Explanation:
Given;
mass of the cart, m = 5.0 kg
initial velocity of the cart, u = 6 m/s
final velocity of the cart, v = 10 m/s
The net work done on the cart is equal to change in average kinetic energy of the cart;

Therefore, the net work done on the cart is 160 J.