A
. retaining gases around Earth to form the atmosphere ... gravity
B. stratifying the atmosphere into layers ... gravity
C. movements of tectonic plates ... gravity & buoyancy
D. spreading of the sea floor ... gravity & buoyancy
E. deflecting cosmic rays ... <em>Earth's magnetic field</em>
Thick lens will have shorter and consequently thin lens will have greater focal length. Because, For a thick lens, the optical path length of the light is more, than for a thin lens, thus, the bending of light will be more in case of a thicker lens. Consequently, it has a shorter focal length.
Answer:
Explanation:
Given that,
The volume of the cube, V = 24 m³
The density of water, d = 1000 kg/m³
We need to find the buoyant force acting on this cube when it totally submerged in water. The formula for the buoyant force is given by :
Substitute all the values,
So, the required force is equal to 235200 N.
Answer:
Explanation:
Given
Let us suppose police car and motorist travel in straight line and police car catches motorist after s distance
Distance travel by motorist
----1
Distance traveled by Police car
----2
from 1 & 2 we get
(a)Velocity of Police car after t sec
(b)time taken by police car is
(c)Distance travel by police car