EASY
Earn 100

Penguins live in extremely cold regions. They have webbed feet which aid them in swimming, thick skin and a lot of fat called blubber under their skin to keep them warm in cold weather and dark coloured and tightly packed feathers which provide warmth to them.

Question Image

What changes are needed to help him adapt best into this kind of an environment?

50% studentsanswered this correctly

Important Questions on Work, Energy and Power

EASY
Science>Physics>Work, Energy and Power>Work
A person of mass 100 kg reaches a height in 10 seconds. Find the power used by the person (g=10 ms2).
EASY
Science>Physics>Work, Energy and Power>Work
In a simple Pendulum the displacement is equal to amplitude. Then kinetic energy will be
EASY
Science>Physics>Work, Energy and Power>Work
1kWh equal to
EASY
Science>Physics>Work, Energy and Power>Work
Which of the following graphs shows correct relation of kinetic energy (E), potential Energy (U) and height (h) from the ground of a particle?
EASY
Science>Physics>Work, Energy and Power>Work
A rod of length l and mass m fixed at one end, is hanging vertically. The other end is now raised so that the rod makes an angle 30° with horizontal line. The work done in the process will be :
EASY
Science>Physics>Work, Energy and Power>Work
How fast should a man weighing 600 N run to achieve a kinetic energy of 750 J. Take g=10 m s-2.
EASY
Science>Physics>Work, Energy and Power>Work
Which of the following graphs best represent the graphical relationship between Kinetic Energy (K.E) and momentum (P) of a body in motion?
EASY
Science>Physics>Work, Energy and Power>Work
Commercial unit of electrical energy one kilowatt hr. (1 kWh) is equivalent to:
EASY
Science>Physics>Work, Energy and Power>Work
Flying birds has
EASY
Science>Physics>Work, Energy and Power>Work
The temperature of the water at the bottom of a water fall is higher than that of the water at the top, because :
EASY
Science>Physics>Work, Energy and Power>Work
Spring constant of a spring is K = 6 ×103 N/m. Work done to stretch it 10-2 m from mean position is
EASY
Science>Physics>Work, Energy and Power>Work
An object of mass 15kg is moving with uniform velocity of 4m/s. What is the kinetic energy possessed by the object?
HARD
Science>Physics>Work, Energy and Power>Work
A pump on the ground floor of a building can pump up water to fill the tank of 30 m3 in 15 min. If the tank is 40 m above the ground, and the efficiency of the pump is 30%, the power consumed by the pump is g=10 m/s2
EASY
Science>Physics>Work, Energy and Power>Work
The work done to increase the velocity of a car from 30 km h-1 to 60 km h-1, if the mass of the car is 1500 kg, is:
EASY
Science>Physics>Work, Energy and Power>Work
The practical unit of electrical energy 1 kWh means
EASY
Science>Physics>Work, Energy and Power>Work
Which of the following term does not represent electric power (P) in electric circuit ?
EASY
Science>Physics>Work, Energy and Power>Work
Which of the following terms does not represent electrical power in a circuit ?
EASY
Science>Physics>Work, Energy and Power>Work
Heat and work done by the heat was discovered by
EASY
Science>Physics>Work, Energy and Power>Work
A force of 40 N acts on a body, and body moves through a distance of 2 metre at an angle of 45° in the direction of the force. The work done by the force is 
EASY
Science>Physics>Work, Energy and Power>Work
In any physical or chemical process, the total energy: