std 9th Science I whole portion 2020
Q 1 A) Choose the correct alternative and rewrite the correct statement. ( 1 mark each ) 1.The force necessary to cause an acceleration of 1m/second square in an object of mass 1kg is called_______. (a) 1 dyne (b) 1m/s (c) 1 newton (d) 1cm/s 2.The work done on an object does not deppend on ________ (a) displacement (b) applied force (c) initial velocity of the object (d) the angle between force and displacement. 3.In order to measure the electric current flowing through a circuit , we connect _______ with the circuit. 4.The unit dalton is used to express _______ (a) atomic mass (b) atomic number (c) atomic radius (d) mass number 5. The solution turns blue litmus paper red, its pH is likely to be _________ (a) 7 (b) 4 (c) 14 ( d) 9 Q 1. B) State whether the following statement are true or false. If false rewrite the correct statement Unit of power is Joule. (1 M ) C) Complete the following (1 M ) K.E = _______