For an ideal case the temperature should be zero.
The fine horizontal scratches etched onto a bullet after it has been fired are called Striations.
<h3>What is Striations?</h3>
- Striations are the minute differences in the curve of the bullet's surface. The bullet and the gun barrel are the harder and softer materials, respectively, in firearms evidence.
- The striations left on the fired bullet are used as a comparison by firearm examiners.
- When a gun is discharged, the bullet blasts down the barrel where it strikes ridges and grooves, spinning and improving shot accuracy.
- These ridges cause striations in the bullet's soft metal by digging into it.
- An examiner analyses these distinctive markings to verify whether a given bullet was shot from a specific firearm.
- A barrel will produce individual markings in addition to a bullet's land and groove impressions as the projectile passes through.
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Answer:
V = 27.46 m/s
Explanation:
given,
mass of the deer(m) = 135 Kg
speed of the deer (u) = 10.5 m/s
assuming,
mass of the car(M) = 900 Kg
initial velocity of car (v) = 30 m/s
using conservation of momentum
m u + M v = (M + m )V
V is the velocity of the car as deer is on the car
135 x 10.5 + 900 x 30 = (900 + 135 ) V
28417.5 = 1035 V
V = 27.46 m/s
so, the velocity of car is equal to V = 27.46 m/s
Coal, natural gas, and petroleum all qualify as correct answers.
