The answer is A because potential energy is stored up energy which means that it’s not moving
Given the speed of the sound in the problem which is 1 mile per 5 seconds.
The speed is calculated by:
Speed = distance/time = (1mi/5s) (1610 m/1mi) = 300 m/s
Note that only 1 significant figure is given which is 5 second and so only 1 significant figure is justified in the result. The speed of sound is 343 m/s. therefore the rule of thumb is fairly close.
I think it is D. Brownies are harder to bake than cupcakes. an example of an objective statement is why a company is hiring for that certain job. let me know if this is correct!
Hope this helped
