Two Particles,each of Charge 2

question 28

Multiple Choice

Two particles,each of charge 2.5 × 10^-19 C,are 4.8 × 10^-5 m apart.What is the change in potential energy if they are brought 2.4 × 10^-5 m closer together? (k_e = 8.99 × 10⁹ N·m²/C²)

• A)1.2E-23 J
• B)4.7E-24 J
• C)2.3E-16 J
• D)1.4E-15 J
• E)2.9E-20 J

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Definitions:

Polymorphic Reference

A reference variable in object-oriented programming that can refer to objects of different classes at different times during the execution of a program.

Subclasses

Subclasses are classes that inherit properties and behaviors from a superclass and can also have additional properties or methods.

Public Methods

Methods that can be accessed from any other class in the program, not restricted by access control.

Superclass

In object-oriented programming, a superclass is the parent class from which other classes inherit properties and methods.