CLASS 11 - ASSIGNMENT 5 - UNITS AND MEASUREMENTS - SUMS
CLASS 11 ASSIGNMENT 5 UNITS AND MEASUREMENTS - SUMS 1. Convert an acceleration of 10m/s² in km/h². 2. The mass of a proton is 1.67 x 10 ⁻²⁷ kg. How many protons would make 1 g? 3. The density of a material is 0.8 g cm⁻ﱣ³. Express it in SI units. 4. What is the number of electrons that would weigh 1 kg? Mass of an electron is 9.11 x 10⁻³¹ kg. 5. What is the order of magnitude of (i) 869000 (ii) 0.05? 6. What is the order of magnitude of seconds in a day? 7. Calculate the angle of 1 degree in radians. 8. If the units of force, energy and velocity are 20N, 200J and 5 ms⁻¹, find the units of length, mass and time. 9. Find the value of 100 J on a system which has 20 cm, 250 g and half minute as fundamental units of length, mass ad time. 10. Check whether the equation E = mc² is correct by the method of dimensions. 11. The distance covered by a particle in time t is given by x = a + bt + ct² + dt³ . Find the dimensions of a, b, c and d. 12. Consider...