Answer:
I’m so sorry I’m not fluent in Spanish but I would love to help
Explanation:
Because sound waves don't travel through the vaccume of space. Hope this helped
Answer:
C - wasted output energy = useful output energy
Explanation:
Useful output + wasted output ALWAYS equals input energy. If the device is 50% efficient, that means that 50% of the input energy is converted into useful output energy, and 50% is converted to wasted output energy. The wasted output energy is equal to the useful output energy.
Answer is B - Exothermic because energy is released
Answer:
d = 7200 m
Explanation:
Given that,
Average speed of a runner, v = 2 m/s
Time taken by the runner, t = 60 min = 3600 s
We need to find the distance covered by the runner.
Speed = distance divided by time taken.
v = d/t
Putting all the values,
So, the distance covered by the runner is 7200 m.