Related Questions

The endurance limit for a mirror polished material will be __________ as compared to unpolished material.
A Same
B Less
C More
D None of these
Four men and 6 women finish a job in 8 days. while 3 men and 7 women finish it in 10 days. while 3 men and 7 women finish it in 10 days. In how many days will 10 women take to finish the work together?
A 32
B 36
C 40
D None
Rumi and Rony can finish a task, working together, in 12 days. If Rony alone can finish that in 20 days, how many days will Rumi need to finish the task working alone ?
A 30
B 20
C 25
D 33
Emissivity of a white polished body in comparison to a black body is
A Higher
B Lower
C Same
D Depends upon the shape of body
Total emissivity of polished silver compared to black body is
A Same
B Higher
C More or less same
D Very much lower
The endurance or fatigue limit is defined as the maximum value of the stress which a polished standard specimen can withstand without failure, for infinite number of cycles, when subjected to
A Static load
B Dynamic load
C Static as well as dynamic load
D Completely reversed load
The emissivity of a polished silver body is _________ as compared to black body.
A Same
B Low
C Very low
D High
The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to
A Minimise its corrosion
B Avoid radiation heat loss
C Make it look attractive
D None of these
If a square mirror has a 20-inch diagonal, what is the approxirnate perimeter of the mirror, in inhes?
A 47
B 51
C 57
D 60
If a square mirror has a 20-inch diagonal, what is the approximate perimeter of the mirror, in inches?
A 40
B 60
C 80
D None of these

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