Care este densitatea materialului din care se confectioneaza un cub de 5cm daca masa lui este de 0,975kg/m3? va rog frumos dau coroana

The freezing and boiling point of a substance changes as the air pressure around it changes. for example, at a lower air pressure (higher altitude) it is easier for water molecules to escape from liquid into the air. in a high altitude city such as denver, colorado compared to a sea-level city such as houston, texas, water

Give one example to show that when substances are mixed,it may result in a chemical or a physical change depending on the conditions.

Which of the following is a true statement about the acceleration ~a of the pendulum bob ~a is equal to the acceleration due to gravity. ~a is perpendicular to the bob’s trajectory. ~a is equal to the instantaneous rate of change in velocity. ~a is tangent to the bob’s trajectory.