Explain the differences between a hypothesis, a law, and a theory.

Solution 4E (a) 25 ps It is a unit of Time. The relation is 1 pc(picosecond) = 10 -12s -12 25 ps = 25 x10 s (b) 374.2 mg It is a unit of Mass. -3 The relation is 1 mg(milligram) = 10 g 374.2 mg = 374.2x 10 g-3 (c) 77 K, It is a unit of Temperature. It can be kelvin scale (K), centigrade scale(°C) and Fahrenheit (°F) scale The relation is K = C+273.13 and °C = 5/ 9 °F - 32 or °F = (9/ 5 °C) + 32 (d) 100,000 km 2 It is a unit of Area. Area = length x breadth -3 1.0 m = 10 km (e) 1.06 pm, It is a unit of length -12 1.0pm(picometer) = 10 m 2 (f)16 nm It is a unit of area. Area = length x breadth 1 nm (nanometer) = 10 m -9 (g) -78 °C, It is a unit of Temperature. It can be kelvin scale (K), centigrade scale(°C) and Fahrenheit (°F) scale The relation is K = C+273.13 and °C = 5/ 9 °F - 32 or °F = (9/ 5 °C) + 32 3 (h) 2.56 g/cm It is a unit of Density. Density= Mass/ volume Unit of mass is g and unit of volume ( V olume = lxlxl) is cm 3 3 (i) 28 cm It is a unit of volume. V olume = length x length x length 3 The other unit of volume is m , Liter (L), gallon (gal)