Physics

Question 4 2 pts Leilani measures the period of time 7 taken for a pendulum to swing freely, repeating for 8 different lengths L of the pendulum. She tries to plot T against L but the graph is not linear. She discovers an equation that relates the period to the length by T2 _ 4- L where g is the acceleration due to gravity. Leilani realises she can use the gradient of a straight line graph to obtain an experimental value for the acceleration due to local gravity. She plots T2 vs L and calculates the gradient of her graph to be 4.57 s2 per m with an absolute uncertainty of 0.1 s2 per m. What value does she calculate for the ABSOLUTE UNCERTAINTY in her experimental result for the acceleration due to gravity in m per s2? Quote this uncertainty to THREE SIGNIFICANT FIGURES. D Question 5 2 pts A litre is the volume of a cube with sides 10 cm long. A rectangular room has dimensions 23.5 m by 6.6 m by 2.75 m. Express the volume of this room in litres, in scientific notation to 3 significant figures. Use the computer format ("e-notation") for scientific notation to enter your answer. e.g. the value 0.00015 would be entered as 1.5e-4