Problem: Text: In the spring of 492 BC an expeditionary force, to be commanded by Darius's son-in-law Mardonius, was assembled, consisting of a fleet and a land army. Whilst the ultimate aim was to punish Athens and Eretria, the expedition also aimed to subdue as many of the Greek cities as possible. Departing from Cilicia, Mardonius sent the army to march to the Hellespont, whilst he travelled with the fleet. He sailed round the coast of Asia Minor to Ionia, where he spent a short time abolishing the tyrannies that ruled the cities of Ionia. Ironically, since the establishment of democracies had been a key factor in the Ionian Revolt, he replaced the tyrannies with democracies.

Question: the persian empire attacked greece by both land and sea?
A: yes

Problem: Text: Competition speed skydivers fly in a head-down position and can reach speeds of 530 km/h (330 mph; 150 m/s); the current record is held by Felix Baumgartner who jumped from a height of 128,100 feet (39,000 m) and reached 1,357.6 km/h (840 mph; 380 m/s), though he achieved this velocity at high altitude, where extremely thin air presents less drag force.

Question: can you free fall faster than terminal velocity?
A: yes

Problem: Text: A deep-cycle battery is designed to discharge between 45% and 75% of its capacity, depending on the manufacturer and the construction of the battery. Although these batteries can be cycled down to 20% charge, the best lifespan vs cost method is to keep the average cycle at about 45% discharge. There is an inverse correlation between the depth of discharge (DOD) of the battery, and the number of charge and discharge cycles it can perform.

Question: is it bad to drain a deep cycle battery?
A:
yes