Physics 125A Lecture 34: Lecture 34

Does a nucleus designated as contain,

(a) 20 neutrons and 20 protons,

(b) 22 protons and 18 neutrons,

(c) 18 protons and 22 neutrons,

(d) 18 protons and 40 neutrons,

(e) 40protons and 18 neutrons,

Does a nucleus designated as  contain (a) 20 neutrons and 20 protons, (b) 22 protons and 18 neutrons, (c) 18 protons and 22 neutrons, (d) 18 protons and 40 neutrons, or (e) 40 protons and 18 neutrons?

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An object is thrown vertically upward and has a speed of 18 m/swhen it reaches three fifths of its maximum height above the launchpoint. Determine its maximum height.


dx=18t+-4.9t^2

3.67=t

v=18-9.8t
-18/-9.8= 1.836