10. In an elastic collision, an object with momentum 25 kg. m/s collides with another object moving to the right that has a

momentum 35 kg . m/s. After the collision, both objects are still moving to the right, but the first object's momentum

changes to 10 kg. m/s. What is the final momentum of the second object?

a. 10kg. m/s

b. 20 kg · m/s

c. 35 kg · m/s

d. 50 kg · m/s

(d) 50 kg · m/s

Explanation:

Given;

initial momentum of first object, m₁u₁ = 25 kg. m/s

initial momentum of second object, m₂u₂ = 35 kg . m/s

final momentum of the first object, m₁v₁ = 10 kg. m/s

final momentum of the second object, m₂v₂ = ?

O > + O> = O> + O>

Apply the principle of conservation of linear momentum;

m₁u₁ + m₂u₂  = m₁v₁ + m₂v₂

25 + 35 = 10 + m₂v₂

60 - 10 = m₂v₂

50 = m₂v₂

Therefore, the final momentum of the second object is 50 kg. m/s

(d) 50 kg · m/s

c) up is the direction the magnetic force is acting on the charge.

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