B I think for 19 and D for 20
If the object is not at rest how?
Answer:
Pupil
Explanation:
Part of the eye which controls the entering of light is called Pupil
Answer:
(a) 2800 J
(b) 31.28 %
Explanation:
Heat intake, Q1 = 8950 J
Heat discard, Q2 = 6150 J
(a) Work = intake heat energy - discarded heat energy
W = Q1 - Q2 = 8950 - 6150 = 2800 J
(b) Efficiency = 1 - Q2 / Q1
Efficiency = 1 - (6150 / 8950) = 0.3128 = 31.28%
I bet it is too bad to get in it but I don’t want it in my anymore cause it’s a good boy to be mad cause he doesn’t even care anymore anymore lol
