For each of the following pairs of materials, decide which has the larger thermal conductivity. justify your choices. (a) pure silver; sterling silver (92.5 wt% ag–7.5 wt% cu) (b) fused silica; polycrystalline silica (c) linear and syndiotactic poly(vinyl chloride) (dp = 1000); linear and syndiotactic polystyrene (dp = 1000) (d) atactic polypropylene (mw = 106 g mol); isotactic polypropylene (mw = 105 g mol)

the movement of aircraft through clouds can even cause lightning strikes. a single lightning event is a "flash", which is a complex, multi-stage explosively ejected.

explanation:

and the person below goggled it.

mark as brainliest

12 is it do you think so

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally