The forces of friction, which oppose displacement, also carry out work when a body is moving. The work of friction is converted into heat. The greater the force of friction, the more force must be exerted to move the body. Verify how friction affects the displacement of some blocks.

The radioactive constant or decay constant, is a coefficient of proportionality which relates the atoms which disappear in a period of time t, with the initial atoms for each radioactive nuclide.

Concept of inductive method

The educational resource shows a visual about the difference between mass and weight: mass is not the same as weight, although in ordinary life both words are used with the same meaning.

Definition of hydrostatic pressure

Concept of deductive method

Concept of wave amplitude

Longitudinal wave concept

Concept of harmonic vibration

Concept of effects produced by forces

The educational resource shows information about the kinetic energy: the kinetic energy of an object is its capacity to change its environment, because it is moving. How far will two balls with different masses and velocities penetrate a block of snow?

The educational resource shows an interactive animation about the latent heat concept: the energy needed to produce a change of phase per unit mass is known as latent heat.

Concept for measuring the forces. Dynamometer

The educational resource shows a visual about the free fall in air: when a body falls through a fluid such as air, its shape is important.

The educational resource shows information about the concept of chemical energy: chemical energy is what is produced in chemical reactions. An energy cell or a battery possess this type of energy. The gas burning in a cigarette lighter shows how the chemical energy contained in the gas is transformed into light and heat.

Concepts of analysis and interpretation of results within the scientific method

The educational resource shows a visual about gravitational potential energy: the calculation of gravitational potential energy is very easy for small heights.

Experiment concept

Concept of harmonics

Buoyancy concept