A28 g ball of clay traveling east at 3.5 m/s collides with a 35 g ball of clay traveling north at 2.8 m/s.
what is the movement direction of the resulting 63 g blob of clay?
what is the speed of the resulting 63 g blob of clay?

45 deg north of east

2.3 m/s

Explanation:

Assuming east as directed along positive x-axis and north as directed along positive y-axis

m₁ = mass of clay ball traveling east = 28 g

v₁ = velocity of ball traveling east = 3.5 i m/s

m₂ = mass of clay ball traveling north  = 35 g

v₂ = velocity of ball traveling north = 2.8 j m/s

m = mass of the combination of two balls after collision = 63 g

v = velocity of the combination after collision

Using conservation of momentum

m₁ v₁ + m₂ v₂ = m v

(28) (3.5 i) + (35) (2.8 j ) = 63 v

98 i + 98 j  = 63 v

1.6 i + 1.6 j = v

Direction :

θ = tan⁻¹(1.6/1.6)

θ = 45 deg north of east

Speed is given as

|v| = sqrt((1.6)² + (1.6)²)

|v| = 2.3 m/s

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

it would be c. predictability