Answer:
height(h)=10 m
acceleration due to gravity (g)=10 m/s^2
mass (m)=?
potential energy=67
or,mgh= 67
or,m×10×10=67
or,m=67/100
or,m=0.67 kg
Therefore,m= 670 grams
I can help. What is wrong.
11. Atomic number
12. in the nucleus with neutrons
8.Carbonate tetranitride
9.Zinc chloride
10.Sodium cyanide
11.Magnesium Phosphate
Answer:
a) hydrogen gas and a salt
b)sodium sulphate,water and carbon dioxide.
c)barium hydroxide and hydrogen gas.
d)magnesium nitrate and water.
