A system displaying a hysteresis loop such as a ferromagnet, is a device for storing memory? Explain the meaning of this statement.

It is advantageous to use the device having smaller value of least count". Explain the statement.

Respiration is an energy releasing and enzymatically controlled catabolic process which involves a step-wise oxidative breakdown of organic substances inside living cells. In this statement about respiration explain the meaning of (a) Step-wise oxidation breakdown (b) Organic substances (used as substrates)

'Motion of simple pendulum from mean positionl for small displacement is a simple harmonic motion'' - Explain this statement.

What kind of ferromagnetic material is used for coating magnetic tapes in a cassette player, or for building 'memory stores in a modern computer?

Explain the statement : Electrical impulses are an excellent means for coordination with its own limitations.

A water cooler of storages capacity 120 liters can cool water at a constant rate of P watts. In a closed circulation system (as shown schematically in the figure), the water from the cooler is used to cool an external device that generates constantly 3kW of heat (thermal load). The temperature of water fed into the device cannot exceed 30^@C and the entire stored 120 liters of water is initially cooled to 10^@C. The entire system is thermally insulated. The minimum value of P ( in watts) for which the device can be operated for 3hours is (Specific heat of water is 4.2kJkg^-1K^-1 and the density of water is 1000kgm^-3 )