Mention two adaptations the mammals of colder regions have, to minimise the loss of body heat.

According to Allen's Rule, the mammals from colder climates have:

why do small mammals of the polar region have short ears and short limbs?

Write True or False: According to Allen's rule, body appendages of animals of colder region are larger than in the warmer parts.

Mention two similarities between: Aves and mammals.

Write the correct option for the following : Mammals from colder climates generally have smaller limbs. This is called :

A small town with a demand of 800 kW of electric power at 220 V is situated 15 km away from an electric plant generating power at 440 V. The resistance of the two wire line carrying power is 0.5 Omega per km. The town gets power from the line through a 4000-220 V step-down transformer at a sub-station in the town. Estimate the line power loss in the form of heat.

Animals have shorter and smaller extremes in colder region. It is

Two wires of equal length, one of copper and the other of manganin have the same thickness. Which one will be used for its electrical heating devices? Why?

An alpha-particle and a proton are moving in the plane of the paper in a region where there is a uniform magnetic field vecB directed normal to the plane of the paper. If the two particles have equal linear momenta, what will be the ratio of their trajectories in the field?

11.6g of an organic compound having formula C_n H_(2n+2) is burnt in excess of O_2(g) initially taken in a 22.41 litre steel vessel. Before reactio0n the gaseous mixture was at 273K with pressure reading 2 atm. Aftercomplete combustion and loss of considerable amount of heat, the mixture of product and excess of O_2 had a temperature of 546K and 4.6 atm pressure. The formula of organic compound is :