Who provided evidence for the excistenes of a nucleus in an atom
2 answers:
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The illumination of the book is found to be approximately equal to 15 lx.
Option 1.
Explanation:
Luminous flux is the measure of power of the light emitted from a source and illumination is the property of the light to illuminate a given surface when it falls on the surface. So the measure of the region the light flux illuminates the surface is termed as illumination.
As here the luminous flux is given as 1759 lm and the distance of the object which has to be illuminated is placed 3 m away from the source ,the illumination is found to be directly proportional to the luminous flux and inversely proportional to the square of the distance between them
So, the illumination of the book is found to be approximately equal to 15 lx.
Answer:
Explanation:
information we have:
mass:
lenght:
frequency:
time:
and from the information we have we can calculate the angular velocity . which is defined as
----------------------------
Now, to calculate the torque
We use the formula
where is the moment of inertia and
is the angular acceleration
moment of inertia of a uniform rod about the end of it:
substituting known values:
for the torque we also need the acceleration which is defined as:
susbtituting known values:
and finally we substitute and
into the torque equation
: