Robert is hosting a backyard barbecue. he uses a charcoal fire to grill the chicken. the chicken cooks but it never touches the fire directly what energy transformation occurs as the chicken cooks

Here Thermal energy is converted in kinetic energy of air molecules and electromagnetic energy.

Explanation:

As we know that there are three ways to transfer heat

1) Conduction : Here we require a solid medium through which heat is transferred without actual movement of medium molecules.

2) Convection : Here medium molecules absorbs the thermal energy and then  move from one place to other place. So here in this method heat is transferred by actual movement of medium

3) Radiation : Here as we know that there is no medium required in this way of heat transfer and here energy is transferred by electromagnetic waves.

So here in barbecue when we cooked chicken then in this process there is no direct contact so here we can say that thermal energy is converted into radiation and kinetic energy of air molecules which helps to cook chicken

i think its c if i'm wrong

b. false

explanation:

suppose a rock in free fall is dropped off a cliff. after falling for 5 seconds, its speed would not be 100 m/s.