The famous black planet, haunch, has a radius of 106 m, a gravitational acceleration at the surface of 4 m/s2 , and the tangenti
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Answer:
the radii of curvature is 30 cm.
Explanation:
given,
object is place at = 45 cm
image appears at = 90 cm
focal length = ?
refractive index = 1.5
radii of curvature = ?
f = 30 cm
using lens formula
R = 30 cm
hence, the radii of curvature is 30 cm.
First, let's convert the initial angular speed from rpm (rev/min) into rad/s, keeping in mind that 
and 1 min=60 s:
Now we can find the angular acceleration of the lp, keeping in mind that the final speed is zero:
and the acceleration is negative because the LP is decelerating.
Now we can find the angle covered by the LP from the beginning to the end of its motion:
And finally, we can convert it into number of revolutions:
Now we can find the angular acceleration of the lp, keeping in mind that the final speed is zero:
and the acceleration is negative because the LP is decelerating.
Now we can find the angle covered by the LP from the beginning to the end of its motion:
And finally, we can convert it into number of revolutions: