The displacement / time graph shown represents a wave of wavelength 1.5 cm. What is the speed of the wave? Answer: Period = 2.0 s so frequency = (1 /…

An organic compound is found to contain 6 parts of carbon, 1 part of hydrogen and 8 parts ofoxygen by mass.6 g of a gaseous sample of the compound would…

Which of the following statements about lipid digestion in the small intestine is / are correct?1 Emulsification by bile makes smaller lipid droplets, each with a smaller surface area.2 Bile…

Which of the following statements about but-1-ene are true?1 it can form a polymer2 it contains C–C single bonds only3 it conforms to the general formula CnH2n4 it decolourises bromine…

In humans, the water content in the blood is regulated via the hormonal system.Which of the following occur when the water content of the blood is too low?1 pituitary gland…

In a town, the bearing of the library from the station is 𝑥∘. The theatre is due east of the library. The theatre and the station are equidistant from the…

Two rods, X and Y, are made from different electrically insulating materials. A student rubs rod X, which is initially uncharged, with a cloth, then holds it near to rod…

Methanol can be oxidised by hydrogen peroxide to produce carbon dioxide and water.𝐚CH3OH + 3H2O2 → CO2 + 𝐛H2OWhat is the value of 𝐛 when this equation is balanced? Answer:…