Bamboo Leaf as Soundproof Walls Material In modern times like today, development and technological development progress rapidly. This matter causing the noise of a room to also increase. This noise results in the effectiveness of the use of space in buildings as well decrease. Therefore, a system for sound isolation or absorption is needed by…
Manufacture of Lignin Sensitized Solar Cells from Wood Waste Building Materials A dye-sensitized solar cell (DSSC, DSC, DYSC or Grätzel cell) is a low-cost solar cell that belongs to the group of solar cell thin films. It is based on a semiconductor formed between a photo-sensitized anode and electrolyte, a photoelectrochemical system. The modern version…
A lava lamp (or Astro lamp) is a decorative novelty item, invented in 1963 by British accountant Edward Craven Walker, the founder of the British lighting company Mathmos. The lamp consists of a bolus of a special coloured wax mixture inside a glass vessel, the remainder of which contains clear or translucent liquid, the vessel…
Preface Spectrometer is a tool used to measure the spectrum of light, Spectrometer is the basis of other sophisticated equipments such as spectrophotometer, Spectrophotometer is a tool used to measure absorbance by passing light with a certain wavelength on a glass or quartz object called a quvet. Some of the light will be absorbed and…
The water cycle or also known as the hydrological cycle is a state that describes how water moves continuously on Earth. Water cycle through different stages include: Evaporation, Condensation, precipitation and flow. Then go back to the evaporation stage. The whole cycle begins again and hence the name “water cycle”. Stages of the Water Cycle…
Preface Inertia or inertia is the tendency of all physical objects to resist changes to the state of motion. Numerically, this is represented by the mass of the object. The principle of inertia is one of the foundations of classical physics used to describe the motion of objects and the effect of force imposed on…
Spiders are one of the beings who have specialized in the sensory organs receive stimuli. He has a sensitive early warning system in which the body is covered with hairs that are very sensitive to vibration. Furthermore, the behavior of spiders shows that they receive information sent through via their webs of vibration trapped prey….
Preface The development of the world that is now very quickly followed by the evolution of all existing tools and technologies become increasingly sophisticated. It requires the existence of energy so that all the tools and technology we can use well whenever and wherever. Examples of such energy sources are petroleum (non-renewable energy source) which…
Indonesia country is an archipelago country that still many areas that are still isolated and there is no electricity and electricity reachable by PLN. Whereas electricity or lighting is needed by the area so that the area is not behind in obtaining information that aims to promote the area and can increase the community’s productivity….
The theory of gravity that Newton invented in the 17th century was also useful for agriculture, with the law published by scientists as well as British philosophers, we can enlarge the size of the fruit without giving any hormones or drugs!. In his book, Newton writes “two separate objects, tend to attract one another, the…