This experimental method of determining the surface tension of a liquid is called the Du Nüoy Ring method. The equation for this is:
σ = F/4πR
where
σ is the surface tension
F is the net force acting on the ring
R is the radius of the center ring
σ = F/4πR = [(16 g - 10 g)(1 kg/1000 g)(9.81 m/s²)]/{4π[(10 m + 9.5 m)/4]}
σ = 9.608×10⁻⁴ N/m
Answer:
A. the pancake that forms is a different state of matter.
Explanation:
because the pancake mix is liquid ,and when you cook it you for a solid.
Answer:
7.5 grams
Explanation:
From the question,
(R/R')ᵇ = 2ᵃ.................... Equation 1
Where b = half life, R = Original mass of iodine, R' = Remaining mass of Iodine after disintegration, a = Total time taken.
⇒ R/R' = 2ᵃ/ᵇ............... Equation 2
Given: R = 60 grams, a = 24 days, b = 4 days
Substitute these values into equation 2
60/R' = 2²⁴/⁸
60/R' = 2³
R' = 60/2³
R' = 60/8
R' = 7.5 grams