Category: Physics

What height of water is supported by atmospheric pressure what height of mercury? 760 mm Why is water not used as barometric liquid? Solution. Water is not a suitable barometric liquid because: (i) The vapour pressure of water is high, so its vapours in the vacuum space will make the reading inaccurate. (ii) Water sticks […]

What are three types of LASERs? Types of lasers – Solid state laser, Gas laser, Liquid laser & Semiconductor laser. What is radiation in laser? Laser radiation is an optical radiation that can either be visible or invisible. If the wavelength of a laser beam is 400-780nm (nanometres), the beam is visible to the human […]

When you prepare for a right turn should you remain as near the center of the lane as possible? As you prepare to turn, reduce speed and stay as far to the right as possible. Begin the turn in the lane nearest to the right-hand curb and end the turn in the lane nearest the […]

Why is my hand eye coordination so bad? Hand-eye coordination problems are usually first noted as a lack of skill in drawing or writing. Poor hand-eye coordination can have a wide variety of causes, but the main two conditions responsible for inadequate hand-eye coordination are vision problems and movement disorders . … What is the […]

How do I calculate power? Power is a measure of the amount of work that can be done in a given amount of time. Power equals work (J) divided by time (s). The SI unit for power is the watt (W), which equals 1 joule of work per second (J/s). Power may be measured in […]

What are the three domains into which organisms are classified? The three-domain system is a biological classification introduced by Carl Woese et al. in 1990 that divides cellular life forms into archaea, bacteria, and eukaryote domains. What are 3 reasons we classify organisms? Classification allows us to understand diversity better. It helps in the identification […]

Does sulfur break easily? Sulfur is a solid, which means you can hold it and touch it, but it is known as a nonmetal, meaning it is not made up of metal. It is recognizable because of its pale yellow color. If you touch it, it is soft and can easily break with your fingers. […]

What are some examples of radiation heat transfer? Some common examples of Radiation are Ultraviolet light from the sun, heat from a stove burner, visible light from a candle, x-rays from an x-ray machine. All life on Earth depends on the transfer of energy from the Sun, and this energy is transferred to the Earth […]

Which statement best describes one way in which global winds affect weather and climate? The correct answer is – B. Westerlies move warmer air toward the poles. The Westerlies are winds that move from the lower latitudes (thus from the warmer areas) towards the bigger latitudes (south and north towards the poles). What are the […]

How do you know if a relationship is direct or inverse? Direct vs. In direct relationships, an increase in x leads to a correspondingly sized increase in y, and a decrease has the opposite effect. This makes a straight-line graph. In inverse relationships, increasing x leads to a corresponding decrease in y, and a decrease […]