If the force of the explosion was focused onto a smaller _____ of the window, then the pressure of the explosion on the window w
2 answers:
<u>Answer:</u> The correct answer is Area.
<u>Explanation:</u>
Pressure exerted on an object is defined as the ratio of force applied to the surface area.
Mathematically,
Where, p = pressure
F = force applied
a = surface area
From the above relation, pressure is inversely related to area. As, the pressure increases, the area will be small and vice-versa.
So, when force of the explosion was focused on a smaller area, then the the pressure of the explosion on the window was greater.
Hence, the correct answer is Area.
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Answer:
The velocity at impact is 222.2 m/s
Explanation:
The given information are;
The time at which the woman heard the sound of the coin after dropping it into the wishing well = 30 seconds
The average speed of sound in air = 344 m/s
The time in which the dime travel = t₁
The time in which the sound travel = t₂
1/2 × 9.8 × t₁² = 344 × t₂
t₁ + t₂ = 30
4.9·t₁² = 344 × (30 - t₁)
4.9·t₁² + 344·t₁ - 10320 = 0
Which gives -344±
t₁ = 22.676 seconds or -92.9 seconds
Therefore the correct natural time is t₁ = 22.676 seconds
The velocity at impact, v = g×t₁ = 9.8 × 22.676 = 222.2 m/s
The velocity at impact= 222.2 m/s.