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Edexcel | Physics WPH0 | W 18 4 1 | 1 hour 30 minutes
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atomic nuclei. The diagram shows an alpha particle interacting with a stationary nitrogen nucleus.

                                   

The alpha particle rebounded off the nitrogen nucleus. The nitrogen nucleus recoiled in

the other direction.

The directions of the paths are shown in the diagram

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4 Mark s

Use of p = mv

Use of × sin 30.0° or × sin 10.9° for vertical

Or Use of × cos 30.0° or × cos 10.9° for horizontal

Use of principle of conservation of momentum

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