Answer:
Option E is correct.
There must be a horizontal wind opposite the direction of the stone's motion, because ignoring air resistance when calculating the horizontal range would yield a value greater than 32 m.
Explanation:
Normally, ignoring air resistance, for projectile motion, the range (horizontal distance teavelled) of the motion is given as
R = (u² sin 2θ)/g
where
u = initial velocity of the projectile = 20 m/s
θ = angle above the horizontal at which the projectile was launched = 30°
g = acceleration due to gravity = 9.8 m/s²
R = (30² sin 60°) ÷ 9.8
R = 78.53 m
So, Normally, the stone should travel a horizontal distance of 78.53 m. So, travelling a horizontal distance of 32 m (less than half of what the range should be without air resistance) means that, the motion of the stone was impeded, hence, option E is correct.
There must be a horizontal wind opposite the direction of the stone's motion, because ignoring air resistance when calculating the horizontal range would yield a value greater than 32 m.
Hope this Helps!!!
Answer:
because copper is a good conductor for heat and electricity
According to the research, the correct answer is to understand the cause and effect relationship in a phenomenon is an action that would improve the qualiy of results when developing an experimental design.
<h3>What is an experimental design?</h3>
It is the alteration of an experimental variable or several at the same time, in an environment strictly supervised by the person who performs the experiment.
In this sense, the researcher can evaluate in what way or for what reason a particular phenomenon occurs, modifying the variables in intensity and being able to evaluate the causes and consequences of the results.
Therefore, in conclusion according to the research, the correct answer is to understand the cause and effect relationship in a phenomenon is an action that would improve the qualiy of results when developing an experimental design.
Learn more about an experimental design here: brainly.com/question/17667382
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