An Alpha Particle Is a Nucleus of Helium

question 39

Multiple Choice

An alpha particle is a nucleus of helium.It has twice the charge and four times the mass of the proton.When they were very far away from each other,but headed toward directly each other,a proton and an alpha particle each had an initial speed of 0.0030c,where c is the speed of light.What is their distance of closest approach? Hint: There are two conserved quantities.Make use of both of them. (c = 3.00 × 10⁸ m/s,k = 1/4πε₀ = 8.99 × 10⁹ N ∙ m²/C²,e = 1.60 × 10^-19 C,
M_proton = 1.67 × 10^-27 kg)

• A)2.1 × 10^-13 m
• B)3.3 × 10^-13 m
• C)2.6 × 10^-13 m
• D)2.9 × 10^-13 m

---

Definitions:

Forensic Confirmation Bias

The inclination within forensic analysis to interpret evidence in a way that confirms pre-existing beliefs or hypotheses.

Self-fulfilling Prophesy

A prediction that causes itself to become true due to the feedback between belief and behavior.

Contemporary Political Climate

The current conditions, attitudes, and dynamics within the political sphere or environment.

Stanford Prison Simulation

A psychological experiment conducted in 1971 by Philip Zimbardo at Stanford University, aimed at exploring the effects of perceived power, focusing on the struggle between prisoners and prison guards.