According to Archimedes' Principle, an Object's density determines the depth it will get by displacing the liquid or gas molecules... More the density, more it's depth.
For a concave mirror, the radius of curvature is twice the focal length of the mirror:

where f, for a concave mirror, is taken to be positive.
Re-arranging the formula we get:

and since the radius of curvature of the mirror in the problem is 24 cm, the focal length is
Acceleration=non-uniform velocity/time
=displacement/time^2
Answer:
<h3>0.77m/s</h3>
Explanation:
According to law of conservation of energy
m1u1 + m2 u2 = (m1+m2)v
m1 and m2 are the masses of the bodies
u1 and u2 are the initial velocities
v is the final velocity after collision
Substitute the given values into the formula
1055(0) + 660(2) = (1055+660)v
0+1320 = 1715v
v = 1320/1715
v = 0.77m/s
Hence the final velocity of each vehicle is 0.77m/s
D- cation, When an atom loses a electron it becomes an ion but the result is called a cation. Then when electrons are gained it’s a anion.