1. A 5kg ceiling fan is fitted 5 m above the floor. Calculate the gravitational potential energy of the Earth - ceiling fan system relative to the floor.

The boiling point of propanoic acid is higher than that of 1-butanol because: propanoic acid has a higher molecular weight than 1-butanol. propanoic acid is more soluble in water than 1-butanol. propanoic acid is a better hydrogen bond donor than 1-butanol. propanoic acid forms hydrogen bonded dimers and 1-butanol does not. 1-butanol forms hydrogen bonded dimers and propanoic acid does not.

Which statement best describes the function of enzymes?

Draw a line graph showing the relationship between temperature in kelvin as a function of kinetic energy.