Tag: science & technology

A seismograph is the scientific instrument that measures and records the intensity, direction, and duration of seismic waves from earthquakes. The prefix 'seismo-' comes from Greek for earthquake.

L.E. Waterman is credited with inventing the practical fountain pen in 1884 after developing a reliable feed system that prevented ink leaks. His innovation made fountain pens commercially viable for everyday use.

C6H5OH is the molecular formula for phenol, which consists of a benzene ring (C6H5) bonded to a hydroxyl group (OH). Methanol is CH3OH, ethanol is C2H5OH, and propanol is C3H7OH.

C12H22O11 is the molecular formula for sucrose (cane sugar). C8H14O7 is incorrect, C6H10O5 is the formula for glucose monomers in starch, and C20H38O19 is not a standard sugar formula.

A hydrocarbon is defined as a compound containing only hydrogen and carbon atoms. 'Hydro' refers to hydrogen and 'carbon' to carbon. Alloys are metal mixtures, carbohydrates contain oxygen, and mixtures are not pure compounds.

Zr is the chemical symbol for Zirconium, a transition metal. Zinc is Zn, and 'Zeerium' and 'Zincrome' are not real elements. Chemical symbols are standardized internationally.

Toxicology is the study of poisons, their effects, and treatments. Botany studies plants, paleontology studies fossils, and virology studies viruses. The word 'toxic' relates to poisons.

The chemical formula for common salt (sodium chloride) is NaCl, consisting of one sodium and one chlorine atom. Na2Cl is incorrect, CoSa is not a valid formula, and NaOH is sodium hydroxide (lye).

Refraction is the scientific term for the change in direction (deviation) of a light wave as it passes from one transparent medium into another with a different density.

A generator is correctly identified as the machine that converts mechanical energy into electrical energy through electromagnetic induction. When mechanical energy (from steam, wind, water, or engines) rotates coils within a magnetic field, electricity is produced. A reactor typically refers to nuclear equipment, while an invertor does the opposite (DC to AC conversion).