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31

TP Chapter 1 Q) What is the momentum of an electron accelerated by 30 keV?

* A) p = √2eVm = 9.35x10-23 kgms-1

32

TP Chapter 1 Q) If the radius of the oil droplet is known, how can the mass of the oil be determined?

* A) m = 4πr3ρ/3