Can someone please help me ?

The acceleration of ball is 18 m/s².

Explanation:

Definition:

The acceleration is rate of change of velocity of an object with respect to time.

Formula:

a = Δv/Δt

a = acceleration

Δv = change in velocity

Δt = change in time

Units:

The unit of acceleration is m.s⁻².

Acceleration can also be determine through following formula,

F = m × a

a = F/m

Given data:

Mass of ball = 0.60 kg

Force on it = 10.8 N

Acceleration = ?

Solution:

a =  10.8 N/0.60 kg

a = 18 N/kg

N = kg.m/s²

a = 18 kg.m/s² / kg

a = 18 m/s²

2b2t

explanation:

2b2t

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.