Which statement is an example of the law of conservation of energy? a soccer ball eventually stops because its energy disappears. when a light bulb is turned on, electrical energy is converted to light and heat. an automobile engine burns gasoline to converts its chemical energy to electrical energy.

-- A soccer ball eventually stops because its energy disappears. No. Energy does NOT "disappear".  That would exactly violate the whole concept of  energy conservation.

-- When a light bulb is turned on, electrical energy is converted to light and heat. Gosh Yes !  This statement tells where the energy comes from, what happens to it, and where it goes.  In a sloppy floppy way, it incorporates all of the highlights of energy conservation.

-- An automobile engine burns gasoline to converts its chemical energy to electrical energy. No.  When you look closely at this statement, MOST of the energy involved is missing and unaccounted for.  The statement only accounts for starting the motor and running the car radio.  It completely ignores the huge amount of mechanical energy produced from the gasoline.

prolly a beacuse the momentuem the car has increases while going down hill

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg