2. Fill in the blanks a. The amount of heat energy produced on completely burning of fuel is called the calorific value
b. The combustion in which no external heat is given is known as
c. Hydrogen being a highly inflammable gas and being a supporter of combustion.
d. Fuel must be heated to its before it starts burning.
e. Fire produced by oil cannot be controlled by.

What challenges did you encounter during the circuit training program?

Free runners jump long distances and land on the ground or a wall. how do they apply newton’s second law to lessen the force of impact?

Because air contracts as it cools, the air pressure inside a freezer is typically lower than on the outside. why do ice cubes inside a freezer tend to shrink over time? a. the ice dissolves oxygen from the air, forming a denser crystalline matrix.b. the ice reacts chemically with carbon dioxide in the air, forming gaseous carbon compounds.c. the ice melts, and then the liquid freezes as ice crystals on the bottom of the freezer.d. the ice sublimes, and then the water vapor deposits as ice crystals on the sides of the freezer.