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Let the distance be x km. Speed upstream = 6 – 3 = 3 kmph Speed downstream = 6 + 3 = 9 kmph => (x/9) + (x/3) = 8 => (x + 3x)/9 = 8 => 4x = 72 => x = 18 km
Water flows in a horizontal pipe of non-uniform area of cross-section at a pressure difference of 1.6 cm of mercury. If the velocity of water at the la...
A potentiometer is an accurate and versatile device to make electrical measurements of E.M.F. because the method involves:
What is the value of acceleration due to gravity at the center of the earth?
Why do brads not have respiratory trouble at the time of flying at high all?
What is the phenomenon of the bending of light as it passes from one medium to another called?
Ratio of intensities of two waves with amplitudes 2 and 3 is:
Cathode rays when obstructed by metal cause emission of -
A parallel plate capacitor is half-filled with a dielectric slab (K = 4). What is its effective capacitance, assuming plate separation d?
In the equation of motion ( v = u + at ), ( u) represents:
Which of the following is the strongest force in nature?
