- #1
mattst88
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This was a question on an online homework for a modern physics class. I had two chances to answer it, but I was wrong both times, so I'm simply curious what the answer is.
(a) Quarks attracted to one another is the strong force
(b) A stable nucleus of 4 protons (Beryllium) and 5 neutrons is the strong force
(c) Collapse of a star into a black hole is gravitational force
(d) Beta decay of 139 Ba is the weak force
(e) A rubber band stretching but not breaking... must the the electromagnetic force?
I answered (d) and then (b). Is it really the rubber band?
Homework Statement
Which of the following statements shows the electromagnetic force at work?
(a) Quarks attracted to one another within a proton
(b) A stable nucleus of 4 protons and 5 neutrons
(c) Collapse of a star into a black hole
(d) Beta decay of 139Ba
(e) A rubber band stretching but not breaking
The Attempt at a Solution
(a) Quarks attracted to one another is the strong force
(b) A stable nucleus of 4 protons (Beryllium) and 5 neutrons is the strong force
(c) Collapse of a star into a black hole is gravitational force
(d) Beta decay of 139 Ba is the weak force
(e) A rubber band stretching but not breaking... must the the electromagnetic force?
I answered (d) and then (b). Is it really the rubber band?