Category: Physics

What is Relay and its application? Relays are used for isolating a low voltage circuit from high voltage circuit. They are used for controlling multiple circuits. They are also used as automatic change over. Microprocessors use relays to control a heavy electrical load. Overload relays are used for protection of motor from overload & electrical […]

What is the average of first 17 odd natural number? The number series 1, 3, 5, 7, 9, . . . . , 33. Therefore, 289 is the sum of first 17 odd numbers. What is the average of first 90 odd numbers? 91 What is the average of first 100 odd numbers? 100 is […]

How do you calculate the de Broglie wavelength? Apply the de Broglie wave equation λ=hmv λ = h m v to solve for the wavelength of the moving electron. Step 3: Think about your result. This very small wavelength is about 1/20th of the diameter of a hydrogen atom. Looking at the equation, as the […]

Does milk put out fire? Milk and Grease Fires Some experts say milk also can cause a fireball or explosion when put on a grease fire. The only way milk can put out a grease fire is if such a vast quantity of milk is used that it completely submerges the fire, causing the fire […]

What are the units of contraction in a muscle called? The unit of contraction in a muscle cell is called Sarcomere. Is a fascicle a motor unit? Motor Unit Anatomy A skeletal muscle fascicle consists of 20 to 60 fibers surrounded by a connective tissue sheath. A single muscle fiber is innervated by only one […]

How do you describe a line of reflection? A reflection is a transformation representing a flip of a figure. When reflecting a figure in a line or in a point, the image is congruent to the preimage. A reflection maps every point of a figure to an image across a fixed line. The fixed line […]

What is the frequency of 500 nm wavelength light? What can be said about the frequency of the wave? Solution: Given, the wavelength of the photon particle = 500 nm. In order to calculate the frequency of the photon particle, we use the formula given above. The frequency of the wave is equal to 6×10-4 […]

How many hours should AC run per day? A properly sized system should run non stop for 24 hours on the hottest day of the year. Well it should run the entire time that the peak load is occuring . This may be for 8 hours or so but will not be for 24 hours. […]

Who is the father of classical physics? Galileo Galilei Why did Einstein oppose quantum mechanics? Einstein always believed that everything is certain, and we can calculate everything. That’s why he rejected quantum mechanics, due to its factor of uncertainty. Who can file a suit upon quantum meruit? A claim of quantum meruit hence is a […]

Is wood a good energy source? Wood is considered humankind’s very first source of energy. Today it is still the most important single source of renewable energy providing about 6 percent of the global total primary energy supply. Wood energy is also an important emergency backup fuel. … What is the majority of wood used […]