A railroad car of mass 20000 kg and velocity 5.0 m s to the right collides completely elastically in a head on collision with a
1 answer:
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Answer:B,C,D
Explanation:
Thermodynamic efficiency is given by
efficiency can be increased by Keeping
constant and increasing
Keeping constant and decreasing
by increasing
by decreasing ratio
Answer:
Δt = 5.29 x 10⁻⁴ s = 0.529 ms
Explanation:
The simple formula of the distance covered in uniform motion can be used to find the interval between when the sound arrives at the right ear and the sound arrives at the left ear.
where,
Δt = required time interval = ?
Δs = distance between ears = 18 cm = 0.18 m
v = speed of sound = 340 m/s
Therefore,
<u>Δt = 5.29 x 10⁻⁴ s = 0.529 ms</u>