How do you know that a sealed calorimeter is a closed system? Because the temperature is conserved Because the masses of the sam
2 answers:
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Answer:
V=15.3 m/s
Explanation:
To solve this problem, we have to use the energy conservation theorem:
the elastic potencial energy is given by:
The work is defined as:
this work is negative because is opposite to the movement.
The gravitational potencial energy at 2.5 m aboves is given by:
the gravitational potential energy at the ground and the kinetic energy at the begining are 0.
We can solve the problem by using the mirror equation:
where
f is the focal length
is the distance of the object from the mirror
is the distance of the image from the mirror
For the sign convention, the focal length is taken as negative for a convex mirror:
and the image is behind the mirror, so virtual, therefore its sign is negative as well:
putting the numbers in the mirror equation, we find the distance of the object from the mirror surface:
So, the distance of the object from the mirror is
where
f is the focal length
For the sign convention, the focal length is taken as negative for a convex mirror:
and the image is behind the mirror, so virtual, therefore its sign is negative as well:
putting the numbers in the mirror equation, we find the distance of the object from the mirror surface:
So, the distance of the object from the mirror is