History of Science

Organic fertilisers - those that originate from the processing of organic or vegetative materials. Examples are bone meal, humus, blood meal, urea (although urea is part processed). organic fertilisers are normally much more diluted than chemical fertilisers and take a longer time to affect the growth of the plant, they are however longer acting and normally add to/ improve the structure of the soil.

Chemical fertilisers - these are compounds that are manufactured from chemicals or chemical byproducts (eg. through the gas and petroleum industry). They are concentrated, fast acting and come in a wide variety of formulations. They can however damage crops if they are incorrectly applied, leach easily from the soil (contributing to the pollution of ground water) and they (normally) have no long residual action in the soil. Examples of these are: NPK formulations, ammonia nitrate, ammonia suphate etc.

Niels Bohr created the Bohr Model of the atom. It was an improvement on previous models (Thompson's Plum Pudding Model, Rutherford's model, etc.) which depicted the atom as a positive nucleus surrounded by negative electrons. Niels Bohr was also a member of the team of scientists working on the Manhattan Project.

The scattering angles would have changed, but the qualitative results would also change: the reason Rutherford chose gold was because it is EXTREMELY malleable. One can stretch gold foil until it is only a few atoms thick in places, which is not possible with aluminum. If the foil were too thick, there would be no transmission of particles at all; the whole point was to demonstrate that most alpha particles passed through unchanged, but some of them scattered, which is only possible with a VERY thin foil.

It was a man-made element, created by the Lawrence Berkely Lab, a lab at the University of California, Berkely. This element was created in 1961.

The density of the unknown solid is 20 g/ml. This is calculated by dividing the mass (40g) by the volume (2ml).

Differences in air temperature are primarily caused by variances in solar radiation, air masses, topography, and proximity to large bodies of water. Factors such as altitude, cloud cover, and land use can also influence local temperature variations. Additionally, air temperature variations can be affected by human activities, such as urban heat islands and greenhouse gas emissions.

During respiration, some energy is released as adenosine triphosphate (ATP) when glucose is broken down in the presence of oxygen. ATP is the primary energy currency of cells and is used for various cellular processes.

Planck, Einstein, Bohr, Heisenberg, Born, Jordan, Pauli, Fermi, Schrodinger, Dirac, de Broglie, Bose made significant contributions to the invention of Quantum mechanics.They all took part in the discovery of Quantum Mechanics and they are called the founding fathers.

well not that much they both spin and that's about it....wat different is that a tornado is sucking in air instead of a black hole it has emense gravity and what goes in a black hole is never seen again and with a tornado is just comes out is maybe a different form (morebeat up)

The cell membrane surrounds the cell and acts like a barrier, controlling what enters and exits the cell to maintain internal balance. It also helps to provide structural support and communication with other cells.

The organelle responsible for destroying and recycling materials in a cell is the lysosome. It contains enzymes that break down waste materials, cellular debris, and foreign particles, allowing the cell to dispose of them efficiently.

Molten materials are substances that have been heated to their melting point, causing them to transition from a solid to a liquid state. This molten state usually exhibits high fluidity and can be poured or molded into different shapes before it solidifies again upon cooling. Examples of molten materials include molten metal, glass, and lava.

A region formed by ancient rock is typically known as a geological formation or ancient geological structure. These regions are characterized by rocks that have undergone significant geological processes over millions of years, resulting in distinctive features and compositions. Examples include the Canadian Shield and the Appalachian Mountains.

He didnt discover DNA,

Erwin Chargaff proposed two main rules in his lifetime which were appropriately named Chargaff's rules. The first and best known achievement was to show that in natural DNA the number of guanine units equals the number of cytosine units and the number of adenine units equals the number of thymine units.

The second of Chargaff's rules is that the composition of DNA varies from one species to another, in particular in the relative amounts of A, G, T, and C bases. Such evidence of molecular diversity, which had been presumed absent from DNA, made DNA a more credible candidate for the genetic material than protein.

An ecosystem is a community of living organisms interacting with each other and their physical environment. It includes plants, animals, and microorganisms, as well as soil, water, air, and sunlight. Ecosystems can vary in size and complexity, but they all involve the flow of energy and cycling of nutrients among the different components.

Yes, it does (although if it's only 60 tons, it would hardly qualify as a 'ship'- more of a 'boat'!)

All ships & boats displace their own weight in water- so for example, a boat of 60 tons would displace 60 tons of water when it was afloat.

Arenal Volcano in Costa Rica has erupted multiple times in its history. Its most recent eruptive period was between 1968 and 2010, during which it experienced frequent mild to moderate eruptions.

Daylight saving time is typically observed in the summer months to extend daylight hours in the evening and reduce the need for artificial lighting. This practice is intended to make better use of natural daylight, particularly during times when most people are awake and active.

The wave in which particles move back and forth at right angles to the direction of travel is called a transverse wave. This type of wave is commonly observed in phenomena such as light and electromagnetic waves.

The Earth doesn't always rotate with the same speed. Ice melting or freezing near the poles, and other mass distributions, may change the speed of rotation. Also, the Earth rotates slower and slower, due to energy lost to friction (through the tides).

As a result, now and then a "leap second" are added in the middle or at the end of the year, to make the official day match the astronomical day. That means that although usually a minute has 60 seconds, and a day has 86400 seconds, now and then you will have a minute with 61 seconds, and a day with 86401 seconds.

The Earth doesn't always rotate with the same speed. Ice melting or freezing near the poles, and other mass distributions, may change the speed of rotation. Also, the Earth rotates slower and slower, due to energy lost to friction (through the tides).

As a result, now and then a "leap second" are added in the middle or at the end of the year, to make the official day match the astronomical day. That means that although usually a minute has 60 seconds, and a day has 86400 seconds, now and then you will have a minute with 61 seconds, and a day with 86401 seconds.

The Earth doesn't always rotate with the same speed. Ice melting or freezing near the poles, and other mass distributions, may change the speed of rotation. Also, the Earth rotates slower and slower, due to energy lost to friction (through the tides).

As a result, now and then a "leap second" are added in the middle or at the end of the year, to make the official day match the astronomical day. That means that although usually a minute has 60 seconds, and a day has 86400 seconds, now and then you will have a minute with 61 seconds, and a day with 86401 seconds.

The Earth doesn't always rotate with the same speed. Ice melting or freezing near the poles, and other mass distributions, may change the speed of rotation. Also, the Earth rotates slower and slower, due to energy lost to friction (through the tides).

As a result, now and then a "leap second" are added in the middle or at the end of the year, to make the official day match the astronomical day. That means that although usually a minute has 60 seconds, and a day has 86400 seconds, now and then you will have a minute with 61 seconds, and a day with 86401 seconds.

No. Galileo Galilei was put under house arrest for life, during an inquisition by the Catholic Church, for claiming that the Earth was not the centre of the Universe, as was the widely held view at the time.

He was also excommunicated (meaning in the eyes of the Church he was destined to go to hell). The Vatican only revoked the excommunication in the mid 1990s. Better late than never.

Most exist in some form of oxide in the ore that carries it. Gold and Silver can exist in a pure form and be pulled right out of the ground and used, but can also be combined with other items and need to be refined.

The specific process that occurs in the cell cycle can vary depending on the stage. In general, DNA replication occurs during the S phase, chromosome segregation happens during the mitotic phase, and cell division occurs during cytokinesis.

The properties of matter are determined by its structure at the atomic and molecular level. For example, the arrangement of atoms and molecules in a solid, liquid, or gas will affect its density, strength, and conductivity. Changes in structure can lead to changes in properties, such as melting or boiling point.

The purchasing power parity (PPP) for Brazil is the exchange rate that would equalize the purchasing power of different currencies, making the cost of a typical bundle of goods and services the same across countries. PPP helps to compare living standards and economic performance across countries more accurately than using market exchange rates.