Answer:
(C) 4500J
Explanation:
η = Efficiency of the gasoline engine = 25% = 0.25
W = mechanical work done by engine per cycle = 1500 J
E = Total input heat
mechanical work done by engine per cycle is given as
W = η E
1500 = (0.25) E
E = 6000 J
U = heat discarded by the engine per cycle is given as
U = E - W
U = 6000 - 1500
U = 4500 J
That one's hard but I'm not really sure what the answer is
The process is called Eutrophication, the two main nutrients that cause eutrophication are nitrogen and phosphorus
Eye strain and self confidence issues.
Answer:
I₂ = 2.13 x 10⁻⁸ W/m²
Explanation:
given,
increase in sound level = 28.1 dB
frequency of the sound = 250 Hz
intensity = 3.3 x 10⁻¹¹ W/m²
Intensity delivered = ?
the difference of intensity level is give as






I₂ = 645.65 I₁
I₂ = 645.65 x 3.3 x 10⁻¹¹
I₂ = 2.13 x 10⁻⁸ W/m²