(a) 841 lb/in; (b) 89.36 cm
(a) 1220 lb/1.45 in = 841 lb/in
(b) To quadruple a measurement is to <em>multiply it by 4</em>.
∴ 4 × 22.34 cm = 89.36 cm
Electron
Electric charge -1
It's found outside the nucleus
It's mass is negligible
Proton
It's mass is 1
The electric charge is +1
it's found in the nucleus
Neutron
It's mass is 1
The electric charge is 0
It's found in the nucleus
