Al must build 25 radios before he receives $20. What schedule of reinforcement is being used?
A. a variable-ratio schedule
B. a fixed-ratio schedule
C. a fixed-interval schedule
D. a continuous schedule

B. a fixed-ratio schedule                                      

Explanation:

Fixed-ratio schedule: In psychology, the term "fixed-ratio schedule" is considered as one of the reinforcement schedules in operant conditioning in which a specific response is being reinforced once particular responses are being completed.

The different reinforcement schedules was proposed by one of the famous behaviorists and psychologists named B. F. Skinner.

In the question above, the given statement represents the "fixed-ratio schedule".

you go to appeals court like section e

~kinetic ~potential

explanation:

kinetic and potential energies would be types of mechanical energies.