1) 62 m 2) 301 m 3) 101 m 4) 75 m 5) 52 m Solution: (5) 52 m The tower is AB. ∠ACB = 60o ∠ADB = 30o Length of shadow = DB CD = 60m In... View Article
1) b tan α cot β 2) b cot α tan β 3) b cot α cot β 4) b tan2 α cot β Solution: (1) b tan α cot β Assume x to be the distance of point A... View Article
The hydrocarbon vapours are heavier than air. The vapour form of hydrocarbon will get collected in enclosed or low spaces. These vapours are... View Article
During reverse polymerization, organic waste is broken down into simpler components by applying a high energy microwave. Molecular bonds are... View Article
The heat pumps lose efficiency below 32-degree Fahrenheit. At very low temperatures heat pumps must rely on secondary sources to heat up the room.... View Article
Salt is a very effective way to make ice cubes melt faster. The other methods would be to pour hot water over ice cubes, keeping it under... View Article
Uncertainty principle or Heisenberg uncertainty principle is the important theory in quantum physics. The principle states that it is impossible... View Article
Nuclear energy refers to the energy in the core or the nucleus of the atom. Nuclear energy can be produced by nuclear fission, nuclear fusion and... View Article
DC voltmeter is used in the measurement of DC voltage across any two points. DC voltmeter measures the peak value of the DC voltage. The DC... View Article
The element with the highest density in group 1 is Francium. The atomic number is 87 and its density is expected to be around 2.48 g/cm3.... View Article
The Arrhenius equation for the rate constant is given as k = Ae-(Ea/RT) Here, k is the rate constant A is the pre-exponential factor Ea is the... View Article
Anhydrous AlCl3 is used in Friedel Crafts reaction since it is an electron-deficient molecule. It is Lewis acid. AlCl3 accepts Cl and becomes... View Article
