The position of a particule is moving along the x-axis is given by x=7.8 + 9.2t - 2.1t³ where x in meter and t in second
a)what is the velocity at t=3.5
b)is the velocity constant or continuous?
c)what is the displacement of the particle after 3 seconds

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.

i think the answer would be b

does anyone know or what?

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.