A spring balance can be used to measure: A. Mass of an object B. Force acting on an object C. Density of an object D. Weight of an object (a) A and B (b) B and C (c) B and D (d) only D
(c) B and D
What is meant by the following statement?
Weight of an object on Earth is 98 N
Which of the following plastic objects can be recycled ?
A. Electric socket B. Polythene bag C. PVC pipe D. Ashtray
(a) A and B (b) B and C (c) A and D (d) C and D
Which sub-atomic particles of an atom are present in the nucleus of an atom?
A = Electrons
B = Protons
C = Neutrons