Atrain consists of a 60 mg engine and three cars, each having a mass of 25 mg . if it takes 90 s for the train to increase its speed uniformly to 45 km/h , starting from rest, determine the force t, developed at the coupling between the engine e and the first car a. the wheels of the engine provide a resultant frictional tractive force f which gives the train forward motion, whereas the car wheels roll freely. also, determine f, acting on the engine wheels

32: from largest to smallest, this hierarchy includes eons, eras, periods, epochs, and ages.

33: answer is c

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ammonium chloride & tallow

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

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