The point where you're standing ... (300, 400) ... is 500 m from the origin.
Light takes (500 m) / (3 x 10⁸ m/s) = 1.67 μs to travel from the origin to you.
So when you SEE the clock at the origin read 3.0 μs, you're
seeing it as it was 1.67 μs ago. YOUR clock says 4.67 μs .
Answer:
SA = 18.6 * t + 186 total distance traveled by A in time t
SB = 24.4 t total distance car B must travel to catch car A
SA - SB = 0 = 18.6 t + 186 = 24.4 t
(24.4 - 18.6) t = 186
t = 186 m / 5.8 m/s = 32 s
Check 18.6 * 32 + 186 = 781 m
24.4 * 32 = 781 m
Hope it helps : )
Specific heat of air at constant pressure = 1.005KJ/kg-K Apparently the hot air leaves the house while equal quantity of the cool air passes inside (Neglecting the small specific volume changes between the hot and the cold air) So the situation can be sampled as a scenario where there is continuous draw down of the thermal energy from the air.