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What is instantaneous velocity

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**Questions**

**A 50 cm long rod is placed against a vertical wall such that the bottom of the rod is 30 cm away from the wall. If the bottom of the rod is pulled horizontally away from the wall at 4 cm. s −1 , the top of the rod starts sliding down the wall with an instantaneous velocity (in cm. s −1 , rounded off to two decimal places) of magnitude _______________.**

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**The baseband signal m(t) shown in the figure is phase-modulated to generate the PM signal φ(t) = cos(2πfc t + k m(t)). The time t on the x-axis in the figure is in milliseconds. If the carrier frequency is fc = 50 kHz and k = 10π, then the ratio of the minimum instantaneous frequency (in kHz) to the maximum instantaneous frequency (in kHz) is __________ (rounded off to 2 decimal places).**

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**Which of the following statements is TRUE for the relation between discharge velocity and seepage velocity? - gate civil 2017**

2 Answer

**The pressure and velocity at the throat of a Venturi tube, measuring the flow of a liquid, are related to the upstream pressure and velocity, respectively, as follows: GATE-Instrumentation-Engineering-2014**

1 Answer

**Define average power and instantaneous power. Give its units and dimensional formula. -Physics Cbse class 11**

1 Answer

**For an incompressible flow through a pipe of constant diameter in the fully developed region the mean velocity ios constant. What about the mean velocity in developing region?**

2 Answer

**W hich one of the following well log responses characterizes an overpressured zone in the subsurface?**

1 Answer

**A hoop of radius r and mass m rotating with an angular velocity ω0 is placed on a rough horizontal surface. The initial velocity of the centre of the hoop is zero. What will be the velocity of the centre of the hoop when it ceases to slip ? - physics 2013**

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**Find the marginal cost when 3 units are produced, where by marginal cost we mean the instantaneous rate of change of total cost at any level of output. (MATHS-CBSE-12-2018)**

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**Find the instantaneous acceleration of a 1.0 kg mass suspended from a spring constant of force constant 5.0 N/cm, when the spring is stretched 10.0 cm. The mass is initially at rest. -Physics CBSE class 11 2016**

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**A spaceship is travelling with a velocity of 0.7c away from a space station. The spaceship ejects a probe with a velocity 0.59c opposite to its own velocity. A person in the space station would see the probe moving at a speed Xc, where the value of X is ________ (up to three decimal places)**

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**I n a two-dimensional, incompressible and irrotational flow, fluid velocity (v) in the ydirection is given by v 2x5y . The velocity (u) in the x-direction is**

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**The dispersion equation of a waveguide, which relates the wavenumber k to the frequency ω, is k(ω) = (1/c)√(ω^2 − ωo^2 ) where the speed of light c = 3 × 108 m/s, and ωo is a constant. If the group velocity is 2 × 108 m/s, then the phase velocity is:**

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**Velocity of an object fired directly in upward direction is given by ܸV = 80 − 32 t , where t (time) is in seconds. When will the velocity be between 32 m/sec and 64 m/sec? GATE- Agricultural Engineering- 2013**

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**The kinetic energy of an object of mass, m moving with a velocity of 5 ms-1 is 25 J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times? - Physics Cbse class 11**

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**A point mass is shot vertically up from ground level with a velocity of 4 m/s at time, t 0. It loses 20% of its impact velocity after each collision with the ground. (Gate 2018 Mechanical engineering)**

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**The term ‘Working head’ in context of water supply system means, GATE- Architecture and Planning- 2013**

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**For steady flow of a viscous incompressible fluid through a circular pipe of constant diameter, the average velocity in the fully developed region is constant. Which one of the following statements about the average velocity in the developing region is TRUE?**

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**G iven that the velocity of P-waves in a sandstone matrix is 5600 m/s and that in oil is 1200 m/s, the velocity of P-wave propagation in oil saturated sandstone with 30% porosity is ___________ m/s. (Use Wyllie time average equation.)**

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**A pitot-static tube is used to measure air velocity in a duct by neglecting losses. The density of air is 1.2 kg/m3. If the difference between the total and static pressures is 1 kPa, the velocity of air at the measuring location, in m/s, is _______.**

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