List of top Geology and Geophysics Questions

The bulk density and water content of a soil are \(1800\ \text{kg m}^{-3}\) and \(18%\), respectively. Find the dry density of the soil. \([\,\text{round off to 2 decimal places}\,]\)

The CORRECT sequence(s) of electromagnetic radiations in terms of increasing wavelength is/are:

A rock is fully saturated with water of resistivity \(\rho_w=0.25\ \Omega\text{m}\). The bulk resistivity is \(\rho=60\ \Omega\text{m}\). Using Archie's law with \(a=1\) (tortuosity factor) and \(m=2\) (cementation exponent), determine the porosity \(\phi\) in percent. \([\,\text{round off to 2 decimals}\,]\)

Two-layer Earth: \(\rho_1=2000\ \text{kg m}^{-3},\ V_1=1800\ \text{m s}^{-1}\) (upper), \(\rho_2=3000\ \text{kg m}^{-3},\ V_2=2100\ \text{m s}^{-1}\) (lower). Compute the normal-incidence P-wave reflection coefficient at the interface. \([\,\text{round off to 3 decimals}\,]\)

Equatorial radius of which one of the following planets is closest to that of the Earth?

Variation of Bouguer anomaly obtained along a profile after applying all the necessary corrections is due to:

The dimension of dynamic viscosity is:

The heat production (\(Q_r\)) of a granitic rock due to decay of the radioactive elements U, Th and K having concentration \(C_U, C_{Th}, C_K\), respectively, is given by the expression: \[ Q_r = \alpha C_U + \beta C_{Th} + \gamma C_K \] Which one of the following correctly represents the relation between the magnitude of coefficients \(\alpha, \beta, \gamma\) (in \(\mu Wkg^{-1}\))?