Which materials, including polystyrenes, can be recycled? polymers thermoplastics ceramics composites

Polymers , thermoplastics.

Explanation:

Polymers like thermoplastic polymers can be recycled because they can be melted easily but thermosetting polymer can not be recycled because of their high melting point. Ceramics due to their high melting point are not recycled.

Thermoplastic composites can be recycled but thermoseting composites are not recycled. Composites are mix of two or more type of material having different physical and chemical properties.

two charges are fixed in place on the x-axis as shown. the charge at x = 0 is negative and has magnitude q = 2 μcoulombs (1 μcoulomb = 10-6 coulombs). the charge at x = d, (d = +12 cm), is positive and has magnitude q = 4 μcoulombs. find a point x = xo along the x-axis at which the electric field is zero.