Which of the following quantities are unknown? Select all that apply

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Which of the following quantities are unknown?

Select all that apply.

Select all that apply.

	the initial speed of the alpha particle
	the charge of the alpha particle
	the value of the electric potential at the initial position of the alpha particle
	the value of the electric potential at the final position of the alpha particle
	the final speed of the alpha particle
	the difference in potential between the initial and final positions of the alpha particle
	the mass of the alpha particle