Answer: Electrostatic force
Explanation :
Ionic compounds can be readily dissolved in water because of the high dielectric constant of water screens and decrease the Electrostatic force between the oppositely charged ions.
Since water is a polar molecule and has a high valued dielectric constant. Water makes a bond with ions when dissolved and reduces the electrostatic forces that hold in a solid structure.
U=30m/s
v=10m/s
t=4s
a=10-30/4
a=-5 m/second square
Answer:
1 Ns
Explanation:
Velocity = Displacement / time taken
v = 5/25 ⇒ v = 0.2 ms⁻¹
Momentum = mass × velocity
= 5 × 0.2 = 1 Ns
Momentum is a product of velocity and mass thus if the velocity doubles, the momentum also doubles.
20000kgm/s*2=40000kgm/s
