a 16kg child on roller skates, initially at rest, rolls 2.0 m down an incline at an angle of 20 degrees with the horizontal. if there is no friction between incline ans skates, what is the kinetic energy of the child at the bottom of the incline

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.

laticia draws the diagram below to show earth’s magnetic field.

answer

the arrows to the right of earth should point up.