The wavelength of a wave is 8 m. The period of the wave is 2 seconds. What is the velocity of the wave?

Explanation:

The diameter of the hole at 248.0 degrees Celsius is 1.330 cm.

Explanation:

given information

diameter, d₀ = 1.325 cm

initial temperature, T₁ = 21°

final temperature, T₂ = 248.0°

to calculate the diameter after the temperature increased

Δd = α d₀ ΔT

where

Δd = the change of diameter

α = thermal expansion constant

d₀ = initial diameter

ΔT = the change of temperature

thermal expansion constant for copper is 17 x 10⁻⁶/°C

thus,

Δd = α d₀ ΔT

     = (17 x 10⁻⁶) (1.325) (248 - 21)

     = 0.005 cm

so, the diameter of the hole at 248°C is

Δd = d - d₀

d = Δd + d₀

  = 0.005 + 1.325

  = 1.330 cm