According to Rutherford's atomic model, the electrons inside an atom are
A). Centralized
B). Not Stationary
C). Stationary
D). None of these
Which one of the following statements with regard to Jet stream, an upper level tropospheric wave, is not correct?
A). It is narrow band of high-velocity wind.
B). It follows the wave path near the tropopause at elevations of 8 km to 15 km.
C). Jet streams are typically continuous over long distances.
D). In summer, the polar front jet achieves its maximum force.
If density of oxygen is 16 times that of hydrogen, what will be their corresponding ratio of velocity of sound?
A). 4 : 1
B). 2 : 1
C). 1 : 16
D). 1 : 4
Intensity of any wave is proportional to which of the following?
A). Amplitude
B). Square of amplitude
C). Square root of amplitude
D). Cube of amplitude
Two waves, each of amplitude 1.5 mm and frequency 10 Hz, are travelling in opposite direction with a speed of 20 mm/s. The distance in mm between adjacent nodes is :
A). 1.0
B). 1.2
C). 1.5
D). 2.0