Answer:
Explanation:
As per the formula of thermal expansion we know that
so here we will have
so here change in the length of the rod is given as
The unit for IMA is _____. newtons joules meters IMA is unitless
2 answers:
The correct answer to the question is unitless i.e the IMA of a mechanical system has no unit.
EXPLANATION:
The IMA of a mechanical system stands for ideal mechanical advantage. It can be defined as the number of times the input or effort force provided to the mechanical system is multiplied under ideal conditions. The ideal conditions means that the system is free from friction, air resistance etc.
Let us consider is the distance over which the input force is applied.
Let is the distance over which the output force is applied.
The ideal mechanical advantage of the system is calculated as -
IMA = .
Both are measured in distance unit.
Hence, IMA is a unitless physical quantity.
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(a)
The change in potential energy of the electron is given by:
where
is the magnitude of the electron's charge
is the magnitude of the electric field
d = 520 m is the distance through which the electron has moved
Substituting into the equation, we find
(b) 78 kV
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where
is the magnitude of the electric field
d = 520 m is the distance through which the electron has moved
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Answer:
0.686 g of ice melts each second.
Solution:
As per the question:
Cross-sectional Area of the Copper Rod, A =
Length of the rod, L = 19.6 cm = 0.196 m
Thermal conductivity of Copper, K =
Conduction of heat from the rod per second is given by:
where
= temperature difference between the two ends of the rod.
Thus
Now,
To calculate the mass, M of the ice melted per sec:
where
= Latent heat of fusion of water = 333 kJ/kg