An object hangs from a spring balance. The balance indicates 30 N in air, 20 N when the object is submerged in water, and 24 N when the object is submerged in an unknown liquid. The density of the unknown liquid equals the density of water multiplied by:

i think it is non rem sleep

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.

co2reflects heat radiation back to earth buning coal and oil emits co2 globe warms

measure their densities same density, same sub