"Recoil velocity is the speed with which the rifle or pistol recoils when the bullet is fired ".
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Quora
It could be one of this 0.2m/s/s
or 0.5m/s/s.
Answer:
b. 4.6 %
Explanation:
From the question,
E = M.A/V.R................ Equation 1
Where E = percentage Efficiency of the machine, M.A = machanical accurancy of the machine, V.R = Velocity ratio of the machine
Make V.R the subject of the equation
V.R = M.A/E
Given: M.A = 3, E = 65% = 0.65
Substitute this values into equation 2
V.R = 3/0.65
V.R = 4.6
Hence the right option is b. 4.6 $
Answer:
The sound level is 138.97 dB.
Explanation:
Given that,
Sound level L= 145 dB
We need to calculate the intensity
Using formula of sound intensity
Put the value into the formula
We need to calculate the noise of one engine
Using formula of intensity
Put the value into the formula
We need to calculate the intensity level due to one engine
Using formula of sound intensity
Hence, The sound level is 138.97 dB
1. clavicle = collarbone
2. vertebrae = backbone
3. scapula = shoulder blade
4. femur = thigh
5. humerus = upper arm
6. patella = kneecap
7. cranium = skull
8. tibia = lower leg
9. radius/ulna = forearm
10. phalanges = fingers/toes
