17. The heat production $(Q_r)$ of a granitic rock due to the decay of the radioactive elements U, Th, and K having concentrations C u , C Th , and C K , respectively, is given by the expression $Q_r…
1. Gravitational acceleration (gravity) is commonly expressed in units of milligals (mGal). $1 Gal=1cm/s^2=0.01 m/s^2$ $1mGal=10^{-3}Gal=10^{-3} cm/s^2=10^{-5} m/s^2$ References: 1. Fundamentals …
1. James Hutton and Charles Lyell propounded the ‘Uniformitarianism’ or ‘actualism’ (the present is the key to the past). Reference: Global Tectonics by Philip Kearey, Keith A. Klepeis, and Frederic…
96. A Thick Sedimentary formation, in Which the seismic wave Velocity V Increases with depth Z from $V_0$ at the surface to $V_1$ at the bottom according to the relation $V_1=V_0e^{\lambda z}$ . th…
24. A seismic reflection survey is carried out over a 1500 m thick horizontal layer with a P-wave velocity of 2000 m/s. The travel time of a reflected wave at a surface detector placed 1000m from …
22. Skin Depth in homogeneous media of resistivity $\rho_{1}$ and $\rho_{2}$ are 100 m and 200 m respectively, at 1000Hz frequency. The ratio $\frac{\rho_{1}}{\rho_{2}}$ will be __________. (Tha…
21. A Mid-oceanic-Ridge has symmetric magnetic anomalies about the ridge axis as shown below. Using the information given in the figure, the average relative velocity between the Plates A and b is …
22. The transmission coefficient for the vertically incident seismic wave at the interface between layer 1 and layer 2 is? Layer1= $V_{1}=1000 m/s,~~~~\rho_{1}=1200kg/m^{3}$ Layer2= $V_{2}=1500 m/…
116. What will be the approximate skin depth of electromagnetic waves of frequency 1 kHz in a conductor having conductivity 100 S/m ? a) 16 meters b). 1.6 meters …
104. The Laplace Transform of unit step function is: (a) 1 (b) $\frac{1}{s}$ (c) $\frac{1}{s^{2}}$ (d) $\frac{1}{s^{3}}$ (Thanks to Pragnath, AU) Solution: - …
97. In a seismic reflection survey, the inferred upper and lower layer velocities are 2 km/s and 6 km/s, respectively. The depth of the refractor is 0.5 km. What will be the crossover distance? …