In restricted visibility, a power - driven vessel under way gives ONE PROLONGED BLAST SOUND SIGNAL every two minutes. In restricted visibility, the ability to observe and see the front is greatly reduced, so the sound signal serves to warm other vessels that another one is within the vicinity.
Explanation:
It is given that,
Height of the object, h = 17 cm
Object distance, u = -75.5 cm
Focal length of the concave mirror, f = -39 cm
We need to find the height if the cup's mirror image. Let v is the image distance. Using mirror's equation as :
v = −80.67 cm
Let h' is the magnification of the mirror. The magnification of mirror is given by:
h' = −18.16 cm
So, the image of cup is 18.16 cm tall and it is inverted. Hence, this is the required solution.
<span>10 times as much. Since F=m*a, and a is constant, the only thing that affects force is the mass.
In response to the below answer, the acceleration due to gravity does not change. The force due to gravity definitely DOES change depending on the mass of the object. Since the force is what the problem asks for, the answer is 10</span>