A Particle (Charge = Q)is Kept in a Fixed Position

question 137

Multiple Choice

A particle (charge = Q) is kept in a fixed position at point P,and a second particle (charge = q) is released from rest when it is a distance R from P.If Q = +2.0 mC,q = -1.5 mC,and R = 30 cm,what is the kinetic energy of the moving particle after it has moved a distance of 10 cm?

• A)60 kJ
• B)45 kJ
• C)75 kJ
• D)90 kJ
• E)230 kJ

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Definitions:

Chemical Defense

A strategy used by some organisms to produce chemical substances for protection against predators, pathogens, or competition.

Insects

Arthropods belonging to the class Insecta, characterized by a three-part body, compound eyes, one pair of antennae, and typically two pairs of wings.

Keystone Species

Keystone species are species that have a disproportionately large effect on their community or ecosystem relative to their abundance, playing a critical role in maintaining the structure of an ecological community.

Community

In ecology, a community is a group of interacting species living in the same area, sharing a common environment.