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Questions

From the surface to the Earth’s interior, the velocity of P-wave decreases and the material density increases at the boundary between: (-Gate geology and geophysics 2014)

A wave progresses up an estuary of decreasing water depth. If friction is neglected, then

T here is a change in the values of the bulk modulus and density across the Gutenberg discontinuity (from mantle to outer core). Which one of the following statements is CORRECT?

As 𝑥 varies from −1 to +3, which one of the following describes the behaviour of the function 𝑓(𝑥) = 𝑥3 – 3𝑥2 + 1? Gate-2016

In an ultrasonic machining (USM) process, the material removal rate (MRR) is plotted as a function of the feed force of the USM tool. With increasing feed force, the MRR exhibits the following behavior Gate-2016

Identify the INCORRECT statement with respect to grain growth. (-Gate metallurgical engineering 2014)

For a steady laminar incompressible boundary layer flow over a sharp-edged flat plate at zero incidence,

W ith time, wind per double traverse in a drum-driven winder

I n dyeing of wool with levelling acid dyes, with time, the pH of dye bath

The flexural rigidity (D) of the oceanic lithosphere (assuming no secondary thermal perturbations) _________.

A shock wave is moving into still air in a shock tube. Which one of the following happens to the air? (GATE-Aerospace-Engineering-2018)

In the feedback network shown below, if the feedback factor k is increased, then the GATE-Instrumentational-Engineering-2013

In a linearly hardening plastic material, the true stress beyond initial yielding (gate 2018 Mechanical engineering)

The electric field of an electromagnetic wave in vacuum is given by E⃗ = E0 cos(3y + 4z − 1.5 × 10^9 t) x̂. The wave is reflected from the z = 0 surface. If the pressure exerted on the surface is αε0E0^2 , the value of α (rounded off to one decimal place) is ___________

T he velocity field and the surface normal vector are given by, V  uiˆ  v ˆj wkˆ and 1 2 3 n  n iˆ  n ˆj  n kˆ , respectively. If Euler equations are to be solved, the boundary condition that must be satisfied at the wall is,

Assuming other variables remaining constant, the Tropical Summer Index (GATE-Architecture-Planning-2018)

T he P-wave velocity and the Poisson’s ratio for a homogeneous and isotropic sedimentary rock are 2500 m/s and 0.3, respectively. The S-wave velocity for the rock is ________m/s.

The shear wave velocity in an igneous rock with a density of 2.7 gm/cc and rigidity modulus of 24.3 GPa is ______ km/s. (round off to 1 decimal place).

A standard CMOS inverter is designed with equal rise and fall times (βn = βp). If the width of the pMOS transistor in the inverter is increased, what would be the effect on the LOW noise margin (NML ) and the HIGH noise margin NMH?

If a mass of moist air in an airtight vessel is heated to a higher temperature, then -gate-mechanical-2011