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The roasting of cocoa beans or the baking of bread, gives us the flavours and aromas that we savour in these foods. It also produces melanoidins that give the brown […]

What is the molarity of water if its density is 1000kg/m3 (Molar mass of water is 18 g/mol) 55.55 moles 45.46 moles 60.0 moles 40.56 moles The molarity of pure […]

The first 4 harmonics produced by an organ pipe open at both ends are 50Hz, 100Hz, 150Hz and 200Hz. Which of the harmonics will remain once one end of the […]

A particle is performing Brownian motion with a diffusion constant D, and has a half-life of τ. The root mean square distance it will be displaced from its starting position […]

Both ends of an actin fibre of length L are pinned to two parallel surfaces, as shown below. The elasticity modulus is E, and the moment of inertia is I. […]

If the energy and momentum of a ball are E and P, respectively, its velocity will scale as: E/P P/E The correct answer is A) E/P, because for a particle like […]

Our skin is easy to pinch, but very hard to pull apart. Based on this property, which of these curves most likely represents the mechanical properties of skin? A B […]

100 photons, one after the other, are sent to a photon detector that has a quantum efficiency of 0.1. How many times will the detector detect photons? exactly 10 times […]

What happens to the protons in a given sample when an external magnetic field is applied? All protons align with the field All protons align opposite to the field All […]

If the ionisation energy of a hydrogen atom is E. When the electron in a hydrogen atom jumps from the first excited state to the ground state, the energy emitted […]