Physics
Will the position of the centre of gravity change if a hollow sphere is completely filled with mercury? Give a reason for your answer.
Related Questions
During β emission the parent and daughter nuclei will be:
- isomers
- isotopes
- isotones
- isobars
Complete the following by choosing the correct answers from the bracket:
(a) The ideal mechanical advantage of a single movable pulley is …………… [less than 1 / more than 1 / equal to 1].
(b) If different colours of light strike a rectangular glass block at same angle of incidence, then maximum lateral displacement will be shown by …………… [Red / Green / Blue] colour.
(c) 1 joule equals to …………… [0.24 / 0.48 / 4.2] calorie.
(d) The hole in the right side of the socket is for connection to the …………… [live / neutral / earth] wire.
(e) The direction of the induced current in the coil of an AC generator is determined by …………… [Fleming’s left-hand rule / Fleming’s right-hand rule / Clock Rule].
(f) In a nuclear reactor, the fission reaction is initiated by bombardment with …………… [a proton / a neutron / an α particle].
Calculate the minimum distance needed in water to hear the echo.
(Speed of sound in water is 1500 m s-1. Persistence of hearing is 0.1 s.)
State the potential of the wire connected to the right hand side terminal of the three pin plug and also state its colour.