Category: Physics

What is the standard form of 12000000000? The standard form is: 1.2 * 10^10. What is the exponential form of 648? Answer. ANS: 2×2×2×3×3×3×3 =2^3 × 3^4… How the distance to stars is measured? To measure the distance of a star, astronomers use a baseline of 1 astronomical unit (AU), which is the average distance […]

Which mineral properties can you identify without special tools? In working with hand samples without specialized tools, mineral hardness is specified by the Mohs hardness scale. The Mohs hardness scale is based 10 reference minerals, from talc the softest (Mohs hardness of 1), to diamond the hardest (Mohs hardness of 10). It is a relative, […]

What are three uses for Convex mirrors? Convex mirrors are used inside the buildings, They are also used in making lenses of sunglasses, They are used in the magnifying glass, They are used in securities and they are used in telescopes. What lens is thicker in the middle than at the edges? A single piece […]

How do you calculate channel capacity when SNR is present? Hence, the channel capacity is directly proportional to the power of the signal, as SNR = (Power of signal) / (power of noise). so for example a signal-to-noise ratio of 1000 is commonly expressed as: 10 * log10(1000) = 30 dB. What is channel capacity? […]

Why is crystallization done class 11? Crystallisation of the filtrate This is done to ensure uniform evaporation and to prevent formation of a solid crust. When the volume of the solution is reduced to one half, dip one end of a glass rod in the concentrated solution and cool the drop by blowing on it. […]

What is under beach sand? Often, underneath the loose sand of a beach is a layer of hard, compacted sand, which could be on its way to becoming sandstone if the necessary cement, pressure and heat ever appear — and if is not eroded by severe storms. What is made from sand? Industrial sand is […]

How much louder is 6 dB? The established reference is 10dB for twice as loud in perception, based on peer review and subjective comments from a cross section of human subjects in experimental lab conditions. Certain absolutes are simply references we go by. In many examples, some of these absolutes can be shown to be […]

What does a dew point of 69 mean? Dew point below 55° = Very comfortable, you don’t even notice the humidity. Dew point of 55° to 60° = Pretty comfortably but you notice a touch of humidity. Dew point of 60° to 65° = Starting to feel humid but not too bad. Dew point of […]

Why do bulbs in a series circuit get dimmer? Why bulbs in series are dimmer The current going through them is smaller because two bulbs in series have a higher resistance than a single bulb. Each charge only gives up some of its energy in each bulb, i.e. the p.d. across each bulb is smaller. […]

What is hydrogen bonding What are its types explain with examples? Hydrogen bond is a electrostatic attraction between a hydrogen atom which is bond to a more electronegative atom such as Nitrogen, Oxygen, fluorine. These are two types of hydrogen bonds :- 1) Intermolecular Hydrogen bonding :- It occurs between two separate molecules. Eq :- […]