Answer:
A
Explanation:
A option is correct .
you cannot create energy neither you can destroy it but you can only convert into other form
There are 8 protons
1.4 g/cm3
Density = Mass/Volume
Mass = 21g
Volume = 15cm3
Density = 21/15 = 1.4
F = MA
500 = 50 multiply by A
A= 500/50
A= 10m/s2
