Related Questions

A semicircular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi circular disc and horizontal surface is µ. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will
A Remain horizontal
B Slant up towards direction of pull
C Slant down towards direction of pull
D None of the above
Dilute wine was used as a thermometric liquid initially to develop temperature scale. First emperical temperature scale developed was the __________ scale.
A Kelvin
B Centigrade
C Fahrenheit
D Reaumer
The average of 100 observations in a study was calculated as 49.7 . Later it was revealed that one of the observations was misread as 64 instead of 94. What will be the correct average ?
A 52.5
B 49.8
C 55
D 50
The average mark obtained by 15 students was 10 and the average mark obtained by 10 students was 15. What was the average mark obtained by all students?
A 10
B 8
C 12
D 15
The average mark obtained by 10 students was 6 and the average mark obtained by 6 other students was 10. What was the average mark obtained by all 16 students?
A 10
B 8
C 7.5
D 8.5
The average mark obtained by 10 students was 6 and the average mark obtained by 6 students was 10. What is the average mark obtained by all 16 students ?
A 10
B 8
C 7.5
D 8.5
The total number obtained by a student in Physics, Chemistry and Mathematics together is 120 more than the marks obtained by him in Chemistry. What is the average mark obtained by him in Physics and Mathematics together?
A 40
B 60
C 120
D Cannot be determined
For a given stress, the ratio of moment of resistance of a beam of square cross-section when placed with its two sides horizontal to the moment of resistance with its diagonal horizontal, is
A $$\frac{1}{2}$$
B 1
C $$\frac{1}{{\sqrt 2 }}$$
D $$\sqrt 2 $$
On a horizontal curve if the pavement is kept horizontal across the alignment, then the pressure on the outer wheels will be
A more than the pressure on inner wheels
B less than the pressure on inner wheels
C equal to the pressure on inner wheels
D zero
The ends of a string weighing w/metre are attached to two points at the same horizontal level. If the central dip is very small, the horizontal tension of the string throughout is
A $$\frac{{{\text{w}}l}}{{4{\text{d}}}}$$
B $$\frac{{{\text{w}}{l^2}}}{{4{\text{d}}}}$$
C $$\frac{{{\text{w}}{l^2}}}{{8{\text{d}}}}$$
D $$\frac{{{\text{w}}{l^2}}}{{16{\text{d}}}}$$

Next steps