Answer:
Magnitude is 25.8 m/s and direction is 
Explanation:
From the law of conservation of linear momentum
where 
and 
are masses of bullet and stones respectively, 
and 
are the initial velocities of bullet and stone respectively, 
and 
are the final velocities of bullet and stone respectively
Substituting 6g=0.006 Kg for mass of bullet, 0.1Kg for mass of stone, 350 m/s for initial velocity of bullet and 250 m/s as final velocity for stone but initial velocity of stone is zero
Substituting 21 for 
and 15 for 
To find direction
Therefore, magnitude is 25.8 m/s and direction is
Here is your answer
We know that
Velocity = Wavelength/Time period
Here,
Wavelength = 200m
Time period= 20 secs
So,
Velocity= 200/20 m/s
v= 10m/s
HOPE IT IS USEFUL
Answer:
When a bullet is fired from a gun, the gun exerts a force on the bullet in the forward direction. This is force is called as the action force. The bullet also exerts an equal and opposite force on the gun in the backward direction. Therefore a gun recoils when a bullet is fired from it.
Answer:
Squamous epithelium has cells that are wider than their height (flat and scale-like). ... Cuboidal epithelium has cells whose height and width are approximately the same (cube shaped). Columnar epithelium has cells taller than they are wide (column-shaped).
