Two marbles (m = 0.050 kg each) moving on a table towards each other with the speed of 0.3 m/s collide, and start moving away from each other.

a.) what is the total momentum of this system before the collision?
v1 = m/s, v2 = m/s,

p1 = kg m/s, p2 = kg m/s,

ptotal = kg m/s

b.) determine the magnitude and direction of the velocity of each marble and the total linear momentum after the head-on collision:

v1 = m/s, v2 = m/s,

p1 = kg m/s, p2 = kg m/s,

ptotal = kg m/s

A.)

V1 = 0.3 m/s m/s, V2 = -0.3 m/s,

p1 =  0.015 kg m/s, p2 = -0.015 kg m/s,

ptotal = 0 kg m/s

B.)

V1 = -0.3  m/s, V2 = 0.3 m/s,

p1 = -0.015 kg m/s, p2 = 0.015kg m/s,

ptotal = 0 kg m/s

Explanation:

In the given system let initially V1 be in positive direction and v2 vice versa.

So for a given velocity v and mass m ,momentum is given by

a)

So its already given that bodies are moving with 0.3 m/s in opposite directions so they would have opposite signs.

V1 = 0.3 m/s m/s, V2 = -0.3 m/s,

p1 =  0.015 kg m/s, p2 = -0.015 kg m/s,

So the sign of the momentum would also be opposite for the other mass.

Hence the total momentum before collision would be zero.

b)

Now  they will be having an head on elastic collision .(If not mentioned anything it is taken as head on collision)

So the direction of velocities would reverse and to the intial values so

V1 = -0.3  m/s, V2 = 0.3 m/s,

And hence the momentums are,

p1 = -0.015 kg m/s, p2 = 0.015kg m/s,

Hence after the collision also the total momentum is zero.

a=d/t

a="triangle"v/t

explanation:

a = acceleration

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