Suppose an electrical wire is replaced with one having every linear dimension doubled (i. e., the length and radius have twice their original values). how is the resistance of the wire affected

The answer is 12, for the points

Two cars collide, lock bumpers and move together after the collision.this collision is known as perfectly inelastic collision.

The answer is 4f======since electrostatic force is given by    we let f be the electrostatic force when  r = 1 m    if we let  denote the electrostatic force when the distance is decreased so that r = 0.5m, then    we established earlier that f = kq₁q₂. therefore    the force will now be 4f.

Year  1936,  lehman predicted that the earths 'inner core' is solid. she observed that the seismic signals during her study were bent and did not pass through instead bouncing back. later it was confirmed that the earth's inner core was solid made up of nickel-iron and had a molten outer core.