A 1000-Kg Whale Swims Horizontally to the Right at a Speed

question 45

Multiple Choice

A 1000-kg whale swims horizontally to the right at a speed of 6.0 m/s.It suddenly collides directly with a stationary seal of mass 200 kg.The seal grabs onto the whale and holds fast.What is the momentum of these two sea creatures just after their collision? You can neglect any drag effects of the water during the collision.

• A)0.00 kg ∙ m/s
• B)1200 kg ∙ m/s
• C)2000 kg ∙ m/s
• D)7200 kg ∙ m/s
• E)6000 kg ∙ m/s

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Definitions:

Piaget's Approach

A theory of cognitive development that describes how children construct a mental model of the world through stages of learning and understanding.

Short-term Memory

The capacity for holding a small amount of information in an active, readily available state for a short period of time.

Working Memory

A cognitive system with a limited capacity that is responsible for temporarily holding information available for processing.

Sensory Memory

The shortest-term element of memory, which allows individuals to retain impressions of sensory information after the original stimuli have ended.