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Nate S.

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Questions asked

INSTANT ANSWER

In a census for a lake fish, 10 individuals were marked and released in second sampling after a few days 15 individuals were caught of which 5 individuals are found marked. The estimated population of the fish in the lake will be

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ANSWERED

Kamlesh Goyal verified

Numerade educator

"A proton of mass 1.6 × 10–27 kg goes round in a circular orbit of radius 0.10 m under a centripetal force of 4 × 10–13 N. then the frequency of revolution of the proton is about"

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ANSWERED

Kamlesh Goyal verified

Numerade educator

A ball of mass 0.1 kg is whirled in a horizontal circle of radius 1 m by means of a string at an initial speed of 10 r.p.m. Keeping the radius constant, the tension in the string is reduced to one quarter of its initial value. The new speed is (a) 5 r.p.m. (b) 10 r.p.m. (c) 20 r.p.m. (d) 14 r.p.m.

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ANSWERED

Kamlesh Goyal verified

Numerade educator

"A wheel of radius 0.20m is accelerated from rest with an angular acceleration of 1 rad /s2 . After a rotation of 90o the radial acceleration of a particle on its rim will be"

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ANSWERED

Kamlesh Goyal verified

Numerade educator

" If the speed of revolution of a particle on the circumference of a circle and the speed gained in falling through a distance equal to half the radius are equal, then the centripetal acceleration will be (a) 2g (b) 4g (c) 3g (d) g"

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ANSWERED

Kamlesh Goyal verified

Numerade educator

Two cars going round curve with speeds one at 90 km/h and other at 15 km/h. Each car experiences same acceleration. The radii of curves are in the ratio of [EAMCET (Med.) 1998] (a) 4 : 1 (b) 2 : 1 (c) 16 : 1 (d) 36 : 1

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ANSWERED

Kamlesh Goyal verified

Numerade educator

"A particle moves with a constant speed v along a circular path of radius r and completes the circle in time T. What is the acceleration of the particle"

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ANSWERED

Kamlesh Goyal verified

Numerade educator

"A scooter is going round a circular road of radius 100 m at a speed of 10 m/s. The angular speed of the scooter will be [Pb. PMT 2002] (a) 0.01 rad/s (b) 0.1 rad/s (c) 1 rad/s (d) 10 rad/s"

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ANSWERED

Kamlesh Goyal verified

Numerade educator

A stone is tied to one end of a spring 50 cm long is whirled in a horizontal circle with a constant speed. If the stone makes 10 revolutions in 20 s, what is the magnitude of acceleration of the stone (a) 493 cm/sec2 (b) 720 cm/sec2 (c) 860 cm/sec2 (d) 990 cm/sec2

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ANSWERED

Kamlesh Goyal verified

Numerade educator

"If a cycle wheel of radius 4 m completes one revolution in two seconds. Then acceleration of the cycle will be"

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