Plz ! the correct answer gets brainleast! which would roll down a slanted desktop more quickly, a ballpoint pen full of ink or a ballpoint pen after it has run out of ink? (note: assume that the total mass of an object does not affect the rate at which it rolls.) a. the pen full of ink will always win the race. b. the empty pen will always win the race. c. the empty pen will win if the incline is steep, and the full pen will win if the incline is gentle. d. the full pen will win if the incline is steep, and the empty pen will win if the incline is gentle.

the first american roller coaster was the mauch chunk switchback railway, built in the mountains of pennsylvania in the mid-1800s. the track, originally built to send coal to a railway, was reconfigured as a "scenic tour."

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.