In Egypt, ancient mummies can be found to have their arteries intact due to well preserved:

• mineralized blood

• fibroblasts fibre

• elastic fibre

• brown fat

Which one of the following statements is not correct?

• In steady flow of a liquid, the velocity of liquid particles reaching at a particular point is the same at all points.

• Steady flow is also called streamlined flow

• In steady flow, each particle may not follow the same path as taken by a previous particle passing through that point.

• Two streamlines cannot intersect each other

During short-circuiting, the current flowing in the electrical circuit

• reduces substantially

• does not change

• increases instantaneously

• varies continuously

The temperature of water at the bottom of a lake whose upper surface has frozen to ice would be around

• - 10°C

• 0°C

• 4°C

• - 4°C

Consider the following statements:

1. Crystallization is a form of mechanical weathering
2. Hydration causes granular disintegration.
3. Frost action issynonymous with freeze-thaw action.

Which of the statements given above are correct?

• 1 and 2 only

• 2 and 3 only

• 1 and 3 only

• 1, 2 and 3

26.

A balloon filled up with gas would only go up in air if it is filled up with

• a gas whose density is lower than air

• a gas whose density is higher than air

• cold air

• water vapour

Planet A has double the radius than that of Planet B. If the mass of Planet A is 4 times heavier than the mass of Planet B, which of the following statements regarding weight of an object is correct?

• Heavier on Planet A than on Planet B

• Heavier on Planet B than on Planet A

• Same on both the Planets

• Cannot be measured on Planet B

Sound waves are similar to the waves

• of laser light passing through air

• generated in a stretched wire by hitting or plucking the wire

• generated in a pipe filled with air by moving the piston attached to the pipe up and down

• generated by the mobile phone towers

Which one among the following waves bats use to detect the obstacles in their flying path?

• Infrared waves

• Electromagnetic waves

• Ultrasonic waves

• Radio waves

A thermodynamic process where no heat is exchanged with the surroundings is

• isothermal

• adiabatic

• isobaric

• isotropic