Answer the question in the picture please!

Janelle made a hypothesis bout the uneven temperatures inside her house during winter. she believes that 50% of the ducts are blocked and she plans to investigate. if she wants to prove her hypothesis using scientific processes what should she do next?

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

There are weak or strong attractive forces between atoms of liquids with a high viscosity