Steel sinks while wood floats because wood is A. more buoyant than steel
B. less buoyant than steel
C. equally buoyant to steel

A

Explanation:The particles in wood are not so closely packed. There is more space in between the particles and fibres, which gives wood its low density. Metals have their particles closely packed such that there is little space inside. This makes metals denser than either wood or water.

answer: enthalpy

explanation:

for a exothermic reaction, the energy is released i.e. the energy of the products is lower than the energy of the reactants.

= enthaply

= energy of products

= energy of reactants

as , thus comes out to be negative. negative value of enthalpy shows that the reaction is exothermic.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).