1- What the relation ship between temperature and density of liquids? 2- What are the factors that affect a simple pendulum experiment?

3- whats application of a simple pendulum experiment in medical sciences?

4- What application of density of liquid experiment in medical sciences?

​ Please i need answers before 25May

The two required components for a generator are

Which best describes the first law of thermodynamics as compared to the second law of thermodynamics? a. the first law describes how thermal energy is conserved but not the direction it moves. b. the first law describes the direction thermal energy moves but not how it is conserved. c. the first law describes how thermal energy can be created but not how it can be destroyed. d. the first law describes how thermal energy can be destroyed but not how it can be created.

Convection currents are caused by differences in what two things?