Answer:
synthesis is correct answer.
Answer:
The net force is 26.52 N
Explanation:
Given that,
Volume of balloon = 2.1 L
Density of air = 1.29 kg/m³
Mass = 1.3 g
Density of helium 
(a). We need to calculate the buoyant force on the balloon
Using formula of buoyant force

Put the value into the formula


(b). We need to calculate the net force
Using formula of net force



Hence, The net force is 26.52 N.
5.
explanation: the answer is 5
Answer:
A:The dissaperance of a solid stirred in water