Question 2 What causes a sound wave to travel?
A
An object vibrates, and those vibrations carry air in all directions as transverse waves.
O
B
An object widrates, and those vibrations cany air in all directions as long dudinal waves.
с
An object vibrates, and those vibrations travel through air in one direction as a transverse wave
D
An object vibrates, and those vibrations travel through air in one direction as longitudinal waves.

if you're asking what comes out, it's steam.

the answer is d. 74.02

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