Springs-of shock absorbers of automobiles and railway coaches are made of steel and not of rubber because steel is
A. More durable than rubber
B. Less expensive than rubber in the long run
C. Less elastic than rubber
D. More elastic than rubber
physics
The branch of physics which deals measurement of light is called
A. Electra-dynamics
B. Photometry
C. Spectrology
D. Spectroscopy
Which of the following instruments is used for seeing details of celestial bodies?
A. Microscope
B. Periscope
C. Spectroscope
D. Telescope
The sun spectrum is
A. Line spectrum
B. Band spectrum
C. Continuous spectrum
D. None of the above
Which of the following statements about the laws of falling bodies is not correct?
A. In the vacuum, all bodies starting from rest fall with, equal velocity
B. The space traversed by a body falling from rest is equal to the square of the time
C. The velocity acquired by a body falling freely from rest is proportional to the timed its fall
D. All the above statements are correct