Amotor vehicle has a mass of 1200 kg, and is traveling at a velocity of 70 km/hours to the southeast. as it travels over a hill, it leaves the pavement and reaches a maximum height of 3 meters off the pavement. calculate the vehicle's gravitational energy. *

35280 J of Gravitational energy

Solution:

Given:

Mass of the vehicle,(m)=1200kg

Maximum height reached,(h)= 3 m

Gravitational energy or gravitational potential energy can be calculated as;

Gravitational Energy = 35280 J

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.

the answer your looking for is c).