if a bullet of unknown mass is fired from a gun with 50m/s. such that the recoil of the gun is -0.3m/s if the mass of gun is 8 kg .find the mass of the bullet

1333.34 kg

Explanation:

Given that,

The mass of the gun, m = 8 kg

Speed of the bullet, V = 50 m/s

The recoil speed of the gun, v = -0.3 m/s

We need to find the mass of the bullet. Using the conservation of momentum to find it. Let M is the mass of the bullet.

So, the mass of the bullet is 1333.34 kg.

the answer is the first electromagnet (a). this is because it has more coils around the ferromagnetic material. increasing the number of coils increases the surface area in which the metal interacts with the current in the coil. this enables more atoms in the metal to become aligned hence becoming more magnetized.