Физика

High-current transformer

1. Bring a nail to glow and furthermore to melt by the secondary current.
2. Bring a piece of Wood's metal to melt.

Sodium Resonance Fluorescence

Principle

Resonance fluorescence is demonstrated by illuminating a sodium vapour with white visible light. The emitted light is spectrally analyzed and shows the emission spectrum of sodium. Therefore the same atomic levels are involved in both absorption and emission.

Subjective colour mixing with the colour wheel

Principle

If a circular disc separated into various differently coloured sectors is rotated by a motor so fast that the eye can no longer distinguish the colours, a mixed colour is then perceived. By varying the composition and size of the sectors, it is possible to give the impression of any ...

Measurement of length

Principle

The students should measure length, diameter, and hole depth of various objects with a measuring tape and/or vernier caliper as possible. In doing this they should choose and use the more suitable measuring device. The results should be entered in the table as a numerical value ...

Measurement of time

Principle

The student should count the oscillations of a pendulum while timing them with the aid of a stopwatch. To determine the dependence of the oscillation period on  the length of the pendulum is shortened by 50% in the second part of the experiment.

Benefits

• Real stand ...

Determination of the mass of solid and liquid bodies

Principle

1. The students should determine the mass of solid bodies with the aid of a balance. 

2. The measurement of the mass of liquids can only be performed using a container. The students should determine the mass from the difference of two measurements.

Benefits

• Real ...

Determination of the volume of regular and irregular bodies

Principle

The students should determine the volume of 3 solid bodies. In doing this they should know that the cubic meter (m³) is the unit of volume and also that the term liter (l) is very common.

1. On immersion of a solid body in a graduated cylinder, the difference of the ...

Determination of the density of solid bodies

Principle

In the previous experiments on determination of mass and volume (ME 1.3 and ME 1.4), the students have learned that both metal columns have the same volume but different masses. They know that the two objects consist of iron and aluminium. Obviously, the two materials ...

Determination of the density of liquids

Principle

In the determination of the density of solids in Experiment ME 1.5, the density was determined as the quotient of mass and volume from a weighing to determine the mass and measurement of volume by different methods. As a prerequisite for this experiment, it was assumed that the ...

Force and reaction

Principle

1. The students should learn with the help of the spring balance that a force on a body can only be exerted when a counterforce acts on it simultaneously.

2. Using two spring balances, the students should experimentally determine that the forces on both spring balances are ...

Weight

Principle

The students are to determine the weight which a mass experiences in the earth's gravitational field with a spring balance. They should know that force is measured in N = kg  m∕s² and recognize that weight is proportional to mass. The proportionality factor is ...

Weight with measureAPP



Principle

"A mass is not only inert but also heavy." Which is intended to mean that not only is a force necessary to accelerate a mass, but also that each mass in the earth's gravitional field experiences a force, the force of weight. The force of weight is to be measured ...

Weight with SMARTsense

Bending of a leaf spring

Principle

1. The students should investigate the behaviour of a leaf spring under load, make a graph of the measuring results and - most importantly - determine the spring constant D.
2. In the course of the same experiment, the (tractive) force should be determined at different angles for ...

Bending of a leaf spring with measureAPP

Leaf springs are thin metal plates that are elastically deformed under load: When a force is applied to a
leaf spring, then it is subject to deformation. A characteristic of such an elastic deformation is that the
original shape is re-formed when the force is no longer active. In ...