Question

2 factors on which specific resistance depends

Answer 1

From geometric considerations is the conductor length and cross-sectional area of physical - conductor resistance

Answer 2

Resistance of a conductor directly depends upon Length of the wire L
Inversely depends upon Area of Cross section of the conductor 1/A
Nature of material used.
Therefore, R=ρ L/A
Length of the conductor is double, means you are stretching that given length to double it. As a result, the wire becomes thin due to stretching. So its area of cross section will be halved(Since the volume remains constant). So new resistance RN = ρ 2L/A/2 = 4. ρ.L/A =4R
Hence the new resistance will become 4 times.