Answer:
the index of refraction of the other material = 1.31
Explanation:
Critical angle is given by the formula;
sin(θ_crit) = n_r/n_i
Where;
θ_crit is critical angle
n_r is index of refraction of the Refractive medium
n_i is index of refraction of incidence medium
We are given that θ_crit = 81° and n_i = 1.33
Thus;
sin 81 = n_r/1.33
n_r = 1.33 × sin 81
n_r = 1.33 × 0.9877
n_r ≈ 1.31
Answer:
θ = 56.09°
Explanation:
Given that
h = 8.5 ft
speed ,u= 28 ft/s
We know that acceleration due to gravity g
g= 32.2 ft/s²
The maximum height h is given as
Now by putting the values
θ = 56.09°
Therefore the angle will be θ = 56.09°
Answer:
The ability of our bodies to adapt to different levels of gravity. You would become weaker and your heart is use to zero gravity. Boredom because there isn't much to in space. When intelligent people get bored, it's not pretty all the time...
The only thing that definitely happens in every such case is:
The container becomes heavier.
To use standard enthalpies of formation to calculate the standard change in enthalpy for the melting of ice. kJ/mol
∆Hf° = standard heat of formation can be use to claculate the std enthalpy change as follows;
∆Hf°reaction = ∆Hf° p - ∆Hf° r
if the reaction is H₂O (s) ---- H₂O(l)
But
∆Hf°reaction = ∆Hf° H₂O(l) - ∆Hf° H₂O (s), which were -285kJ/mol and -291.8kJ/mol (obtained from the back of chemical process analysis text)
∆Hf°reaction = -285.8 kJ/mole - (-291.8 kJ/mole) = 6.0 kJ/mole = 6000 J/mole
heat gained by ice melting = heat lost by cooling water
(mass x ∆Hf°) ice = (mass x Cp x dT) liquid water
mass ice = (mass x Cp x dT) liquid water / (∆Hf°) ice
mass ice = 480 mL x 1.00 g/mL x 4.18 J/gC x (25-0 C) / 6000 J/mole
= 5.66 mole ice = 5.66 mole x 18.0 g /mole = 150 g of ice required to cool the 480mL of water.