Answer:
Option B
Explanation:
The overjustification effect is a term in psychology that is described as an act when used diminishes intrinsic motivation; this effect takes place when a reward (introduction of an extrinsic reward ) is been attached as a motivator of behavior, as a result, decreases the intrinsic motivation (behavior that is driven by internal rewards) to do something. Incentive such as money, gift, praise etc are introduced after a behavior can lead to lower, rather than higher motivation to perform a task
According to the overjustification effect, reinforcements that praise people tend to increase intrinsic motivation, and reinforcement that seeks to control people decrease intrinsic motivation.
Answer:
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When a glacier retreats, and the sea fills the resulting valley floor.
Answer:
Statement that is true about electromagnetic and mechanical waves is:
Option B: Mechanical waves must travel through a medium, but electromagnetic waves do not require a medium to travel.
Explanation:
'Electromagnetic' waves do not need any medium to travel whereas 'mechanical waves' need a medium or matter for transmission. Electromagnetic waves are produced by the 'vibrations' of the charged particles. They can even travel in vacuum.
On the contrary, mechanical waves are caused by the 'wave amplitude'. Mechanical wave can travel in solid, liquid and gas and are considered to be periodic disturbance.
Thus, Option B is the most statement apt explaining the difference between electromagnetic and mechanical waves.
