Solved Numerical Problems | Chapter 1 Measurements | Physics 11th | Balochistan Board Queta | Urdu скачать в хорошем качестве

Solved Numerical Problems | Chapter 1 Measurements | Physics 11th | Balochistan Board Queta | Urdu

How much distance is covered by light in one year when its speed in space is 3×〖10〗^8 〖ms〗^(-1). Mass of neutron is 1.67×〖10〗^(-27) kg. Calculate the number of neutron in a piece of metal whose net mass is one gram. Prove that nano seconds in one second is more than the number of seconds in one year. Convert the following (a) 20〖ms〗^(-1) into kmh^(-1), (b) 3×〖10〗^8 〖ms〗^(-1) into kmh^(-1), (c) 220kmh^(-1) into 〖ms〗^(-1) (a) Express the following values in terms of prefixes. (i) 0.62×〖10〗^4 g (ii) 2×〖10〗^7 m (iii) 4×〖10〗^(-5) s (b) Express the following values in terms of scientific notation. (i) 0.000036 (ii) 140000 (iii) 107000000 The radius of a rod is 0.24cm. Find its cross sectional area with appropriate significant figures. How many significant figures are there in the given values? (a) 32.900 (b) 2003 (c) 2.0 (d) 0.0007 (e) 2.73×〖10〗^6 Add the given values 12, 13.5, 15.432. Give the answer to correct significant figures. Verify that the given equation S=v_i t+at^2 is dimensionally correct. The centripetal force F acting on a particle (moving uniformly in a circle) depends on the mass m of the particle, its velocity v and radius r of the circle. Derive dimensionally the formula for the centripetal force F.