Which of the following symbols represents half-life?

Explanation:-

1. Activation energy is the extra energy required by the reactants to cross the energy barrier and convert to products. It is designated by the symbol .

2. Half life is the time taken by a reactant to reduce to its original concentration. It is designated by the symbol .

3. Alpha decay: In this process, alpha particles is emitted when a heavier nuclei decays into lighter nuclei. The alpha particle released has a charge of +2 units.

4. Beta-decay: In this process, a neutron gets converted into a proton and an electron releasing a beta-particle. The beta particle released carries a charge of -1 units.

dynamic equilibrium is the answer.

conduction is the transfer of thermal energy (heat in transfer) due to collisions between the molecules in the object. collisions between adjacent atoms and molecules transfer kinetic energy from the warmer to the cooler object. the objects must be in physical contact.