Answer:
D.
Explanation:
To solve the problem it is necessary to apply the concepts of Destructive and constructive interference. The constructive interference in tin film is given by
Where,
t = thickness
Wavelenght
m= is an integer
n= film/refractive index
We use this equaton because phase change is only present for gasoline air interface, but not at the gasoline-water interface. <em>The minimum t only would be when the value of m=0 then</em>
Therefore the correct answer is D. The minimum thickness of the film to see ab right reflection is 100nm
Newtons 1st law of motion is law of inertia and this law is either an object at rest stays at rest or an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
The magnitude of the force each hook exerts on the chain is 22.2N.
<h3>Solution:</h3>
Horizontal force on one half of the chain
cos 42° =
sin 42° = 20
= 29.9N
Now,
= 22.2N
To learn more about the magnitude of forces, refer
brainly.com/question/20905151
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Answer:
Explanation:
We have,
Area 1,
Force 1,
Area 2,
It is required to find the force 2. In a hydraulic lift, the pressure at two points is same. It means :
So, second force is 2000 N.
Answer:
reaches a higher temperature is LEAD.
Explanation:
In this exercise we have a calorimeter problem, in which the initial energy is absorbed by each body
E₀ = m c_e ΔT
where E₀ = 5000 J
ΔT =
the specific heats for each material are tabulated
material c_e (J / kg ºC)
glass 837
copper 387
lead 128
gold 129
As they indicate that the mass of the materials is the same, the one with the greatest temperature difference is the one with the least specific heat, consequently the one that reaches a higher temperature is LEAD.
let's calculate for a mass of 1 kg
glass
ΔT = 5000/(1 837)
ΔT = 6ºC
Lead
ΔT = 5000/(1 128)
ΔT = 39.1º
GOLD
ΔT = 5000/(1 129)
ΔT = 38.8º C