An object of mass m1 = 19 kg and velocity v1 = 1.5 m/s crashes into another object of mass m2 = 8 kg and velocity v2 = −13.5 m/s. the two particles stick together as a result of the collision. because no external forces are acting, the collision does not change the total momentum of the system of two particles, so the principle of conservation of linear momentum applies. m1v1i + m2v2i = (m1 + m2)vf if jed and kadia use the one-dimensional conservation of momentum equation to find the final velocity of the two joined objects after the collision, what do they obtain? (indicate the direction with the sign of your answer.)

-2.9 m/s

Explanation:

If we assume that no external forces act during the collision, total momentum must be conserved.

If the collision is completely inelastic, so both masses continue stuck together after it, we can consider that the system behaves like it were a single mass, with a single speed.

So, we can write the following:

p₁ = p₂ ⇒ m₁.v₁ + m₂.v₂ = (m₁ + m₂) vf

Replacing by the values, and solving for vf, we get:

vf = (19 kg. 1.5 m/s + (8 Kg. (-13.5 m/s)) / 19 kg + 8 Kg = -2.9 m/s.

electric

explanation:

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