In reaction to energy transfer in ecosystem, explain the statement "10 kg of deer's meat is equivalent to 1 kg of lion's flesh".

Briefly explain the 10% law of energy transfer in an ecosystem.

Suppose the average mass of raindrops is 3.0 xx 10^-5 kg and their average terminal velocity 9 ms^-1 . Calculate hte energy transferred by rain to each square metre of the surface at a place which receives 100 cm of rain in a year.

Use the sign of gt,lt or = in the blank to make the statements true 1500g__1kg

Calculate the energy released by the fission of 1.0 kg of "^235U in a fission reactor.

Two bodies of masses 1 kg and 3 kg respectively are connected rigidly by a vertical spring. The body of mass 3 kg rests on a smooth horizontal surface. The force constant of the spring is 484Nm^(-1) . From the equilibrium position, the mass of 1 kg is displaced vertically through a distance of 0.02 m and then released. calculate (i) and frequency of oscillation of the mass of 1 kg (ii) the maximum velocity of this mass (iii) its oscillation energy and (iv) the reaction of the table on the mass of 3 kg, when mass 1 kg is having harmonic oscillations.

An electron and a proton are detected in a cosmic ray experiment, the first with kinetic energy 10 keV, and the second with 100 keV. Which is faster, the electron or the proton ? Obtain the ratio of their speeds, (electron mass = 9.11xx10^-31 kg , proton mass = 1.67xxl0^-27kg , 1 eV = 1.60 xx 10^-19 J )

Calculate and compare the energy released by fusion of 1.0 kg of hydrogen deep within Sun.

Each question contains STATEMENTS-1 (Assertion) and STATEMENT -2 (Reason). Examine the statements carefully and mark the correct answer according to the instructions given below: STATEMENT -1: If the activation energy of reaction is zero, temperature will have no effect on the rate constant. STATEMENT-2: Lower the activation energy faster is the raction.

Gasoline has an enthalpy of combustion 24000 kJ/mol gallon. When gasoline burns in an automobile engine, approximately 30% of the energy released is used to produce mechanical work. The remainder is lost as heat transfer to the engine's cooling system. As a start on estimating how much heat transfer is required, calculate what mass of water could be heated from 25^(@)C to 75^(@)C by the combustion of 1.0 gallon of gasoline in an automobile? (Given : C(H_(2)O)=4.18 J//g^(@)C ) a) 34.45 kg b) 80.383 kg c) 22 kg d) 224 kg