Answer:
option b is correct.
Explanation:
Since the position as a function of time is given by
which is a periodic function thus the motion of the particle repeats after a time of 2 seconds thus among the given options only option b is case of repetitive motion thus option b is most appropriate since the spinning wheel repeates it's motion.
Arrow at the left side pointing towards right side represents the frictional force as it always acts opposite to motion
Answer:
Scientists use the scientific method to collect measurable, empirical evidence in an experiment related to a hypothesis.
Explanation:
I assume here that the engine operates following a Carnot cycle, which achieves the maximum possible efficiency.
Under this assumption, the efficiency of the engine (so, the efficiency of the Carnot cycle) is given by
where
is the cold temperature
is the hot temperature
For the engine in our problem, the cold temperature is 313 K while the hot temperature is 425 K, so the effiency of the engine is
