I believe it isa refraction. hope this helps
Option a) 0.8 m/s² is the correct answer
the acceleration of the motorcycle is 0.8 m/s²
Given the data in the question;
Since the motorcycle stopped then, initial speed u = 0 m/s
final speed v = 12 m/s
time t = 15 s
acceleration = ?
To get our acceleration, we use the first equation of motion.
This equation states that;

so, we simply substitute in our given values

so we find a


Therefore, the acceleration of the motorcycle is 0.8 m/s²
Option a) 0.8 m/s² is the correct answer
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Answer:
a)
, b) 
Explanation:
a) According the Archimedes' Principle, the buoyancy force is equal to the displaced weight of surrounding liquid. The mass of the coal in the barge is:




b) The submersion height is found by using the equation derived previously:


The final submersion height is:

Awnser is B. The forces are equal opposite of each other.
<span>Answer: A. Exercising
above your target heart rate.</span>
The individual's current
level of fitness depends on the amount of exercise needed. I would advise my
friend to exercise above her/his target heart rate to help improve her/his
cardiovascular endurance for an individual has genetically the capacity to
adapt to training, his or her fitness goals, and to the component being
developed such as improve cardiovascular endurance.
<span>In addition, if my friend is
exercising with in or below her/his target heart rate, her/his goal will not be
achieve because her/his stamina and strength will not increase. If she/he will
like to improve her/his cardiovascular endurance, a gradual increase in her/his
workouts must be done. Therefore, she/he must exercise above her/his target heart rate.</span>
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