Which of the following is an example of a luminous object? Dog Tree Candle Moon
1 answer:
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It is called "distance". In fact, distance measures how far apart two points are from each other, and it is always a positive number.
In mathematics, for instance, the distance between two points of coordinates (x1,y1) and (x2,y2) on a xy-plane is defined as
and by definition, this number is always positive.
In mathematics, for instance, the distance between two points of coordinates (x1,y1) and (x2,y2) on a xy-plane is defined as
and by definition, this number is always positive.
Answer:
a
The focal length of the lens in water is
b
The focal length of the mirror in water is
Explanation:
From the question we are told that
The index of refraction of the lens material =
The index of refraction of the medium surrounding the lens =
The lens maker's formula is mathematically represented as
Where is the focal length
is the index of refraction
are the radius of curvature of sphere 1 and 2 of the lens
From the question When the lens in air we have
When immersed in liquid the formula becomes
The ratio of the focal length of the the two medium is mathematically evaluated as
From the question
= 79.0 cm
and the refractive index of water(material surrounding the lens) has a constant value of
b
The focal length of a mirror is dependent on the concept of reflection which is not affected by medium around it.
Hi there!
We can use the rotational equivalent of Newton's Second Law:
Στ = Net Torque (Nm)
I = Moment of inertia (kgm²)
α = Angular acceleration (rad/sec²)
We can plug in the given values to solve.