Physics
Draw a graph of potential energy vs height for a body thrown vertically upwards. [Assume no friction is present.]
Work, Energy & Power
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Answer
The graph of potential energy vs height for a body thrown vertically upwards is shown below where u(J) represents potential energy in joules and h(m) refers to height in metres.
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A nucleus of an atom consists of 146 neutrons and 95 protons. It decays after emitting an alpha particle. How many protons and neutrons are left in the nucleus after an alpha emission?
- protons = 93, neutrons = 142
- protons = 95, neutrons = 144
- protons = 93, neutrons = 144
- protons = 95, neutrons = 142
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