A pistol of 0.5kg fires a bullet of 0.05kg at a velocity of 300m/s, calculate the recoil velocity of the gun.
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Ответ:
3883484
Explanation:
ok its correct i think
Ответ:
Ответ:
using the lens formula: 1/f = 1/u + 1/v
focal length f = -30 (negative because it is concave lens)
object distance u = 60
image distance v= unknown
1/-30 = 1/60 + 1/v
v = -20
So, the image is 20cm from lens (on the same side along with the object), and it is virtual (because of negative sign) and erect (concave lens must produce erect images).