2. The relative molecular mass (M) of a compound is 60. Which formulas are possible for this compound?
I.
CH3CH2CH2NH2
II.
CH3CH2CH2OH
III.
CH3CH(OH)CH3
A.
I and II only
B.
I and III only
C.
II and III only
D.
I, II and III

Okay well gravitational energy is matter forced by gravity making energy though the kinetic energy then the electric energy produces electricity from the kinetic energy and the kinetic energy gets its energy from the gravitational energy. was that the answer you wanted or something else?  

Ahigh energy (high speed) particle (alpha or beta or neutron) are shot at the target;

Ithink it's the third answer