A spherical wood with a diameter of 6cm is immersed in a container of liquids with the oil filled to a height of 6cm and the mercury is filled to a height 8cm above the oil. If the diameter of the wood is at the interface between mercury and oil, calculate, (a) The gauge pressure at the upper surface of the block? (b) The gauge pressure at the lower surface of the block?

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.

what is the speed of a softball that travels 20m in 2secs

speed = 20/2 = 10 m/s