Lydia is often described as having a positive outlook on life. she assumes the best of people and situations. lydia exemplifies

Explanation:

Optimism could be defined as a spiritual and mental disposal for positive outcomes, refers to the best future coming, the opposite of pessimism.

A optimistic person is who have a positive view of situation, even if it isn't seem like that, even these kind of people see positiveness in others, like Lydia.

5 w for 1hr = 5x60x60 joules=300x60=3000x6=18,000j as total energy conversion. efficiency of bulb needed for radiant to thermal within 18000

float.

archimedes' principle

denser than water sinks in water.

denser than mercury would sink in it