Modern electrification systems take AC energy from a power grid which is delivered to a locomotive and converted to a DC voltage to be used by traction motors. These motors may either be DC motors which directly use the DC or they may be 3-phase AC motors which require further conversion of the DC to 3-phase AC (using power electronics). Thus both systems are faced with the same task: converting and transporting high-voltage AC from the power grid to low-voltage DC in the locomotive. Where should this conversion take place and at what voltage and current (AC or DC) should the power flow to the locomotive? And how does all this relate to energy-efficiency? Both the transmission and conversion of electric energy involve losses: ohmic losses in wires and power electronics, magnetic field losses in transformers and smoothing reactors (inductors). Power conversion for a DC system takes place mainly in a railway substation where large, heavy, and more efficient hardware can be used as compared to an AC system where conversion takes place aboard the locomotive where space is limited and losses are significantly higher. Also, the energy used to blow air to cool transformers, power electronics (including rectifiers), and other conversion hardware must be accounted for.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What nowdays electrification systems can use?
Ah, so.. DC motors which directly use the DC or they may be 3-phase AC motors

Notable among a number of songs commonly played and sung at various events such as commencement and convocation, and athletic games are: "I'm a Jayhawk", "Fighting Jayhawk", "Kansas Song", "Sunflower Song", "Crimson and the Blue", "Red and Blue", the "Rock Chalk, Jayhawk" chant", "Home on the Range" and "Stand Up and Cheer."
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What are three songs that reference the school's team colors in their titles?
Ah, so.. unanswerable

Along with the rest of South West England, Somerset has a temperate climate which is generally wetter and milder than the rest of the country. The annual mean temperature is approximately 10 C (50.0 F). Seasonal temperature variation is less extreme than most of the United Kingdom because of the adjacent sea temperatures. The summer months of July and August are the warmest with mean daily maxima of approximately 21 C (69.8 F). In winter mean minimum temperatures of 1 C (33.8 F) or 2 C (35.6 F) are common. In the summer the Azores high pressure affects the south-west of England, but convective cloud sometimes forms inland, reducing the number of hours of sunshine. Annual sunshine rates are slightly less than the regional average of 1,600 hours. In December 1998 there were 20 days without sun recorded at Yeovilton. Most the rainfall in the south-west is caused by Atlantic depressions or by convection. Most of the rainfall in autumn and winter is caused by the Atlantic depressions, which is when they are most active. In summer, a large proportion of the rainfall is caused by sun heating the ground leading to convection and to showers and thunderstorms. Average rainfall is around 700 mm (28 in). About 815 days of snowfall is typical. November to March have the highest mean wind speeds, and June to August the lightest winds. The predominant wind direction is from the south-west.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): The average rainfall level of somerset
Ah, so..
Average rainfall is around 700 mm (28 in)