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Concept:

• Elastic potential energy is the energy stored as a result of applying a force to deform an elastic object.
• The energy is stored until the force is removed and the object regains its original shape, doing work in the process.
• This deformation could involve compressing, stretching, or twisting the object.
• Many objects are specifically designed  to store elastic potential energy inside them,

​For example:

• The coil spring of a wind-up clock
• An archer's stretched bow
• A stretched slingshot ready to fire.

Calculation:

\(F = \frac{Y\times A\times dl}{l} = \frac{2.0 \times 10^{11}\times10^{-5}\times 0.001}{1} = 2000~ N\)

The correct answer is Duck-billed Platypus

Key Points

• The mammal that lays eggs is Duck-billed-platypus.
• They are small and shy animals.
• They have flattened heads and bodies to help them glide through the water.
• Males are also venomous.
• They are bottom feeders i.e. feed on  insects and larvae, shellfish, and worms
• They can survive up to 20 years or more in captivity and up to 12 years in the wild.
• They are believed to be the earliest relatives of modern mammals.

Important Points 

• The egg-laying mammals are called monotremes.
• There are only five living monotreme species:-
• The duck-billed platypus and four species of echidna (also known as spiny anteaters).
• They are all found only in Australia and New Guinea.

Correct answer is It is a metalloid. 

Key Points

• Carbon characteristic
• Carbon makes 4 electrons to form a covalent bond.
• Carbon is not a metalloid, it is Non-Metal.
• It has a number of allotropes and other forms of existence. These include diamond and graphite with distinctive properties.
• It forms multiple bonds.
• It exhibits catenation.
• This chemical element is represented by the symbol C.
• Its melting points and boiling points are very high.
• Carbon is both nonmetallic and tetravalent.
• It is available in various shapes.
• The chemical element has the ability to bond with multiple elements.

Correct answer is Wild life protection act

Key Points

• The Wild Life (Protection) Act, 1972 is an Act of the Parliament of India enacted for protection of plants and animal species. Before 1972, India had only five designated national parks. Among other reforms, the Act established scheduled protected plant and hunting certain animal species or harvesting these species was largely outlawed. The Act provides for the protection of wild animals, birds and plants

Important Points

Defination under the Wild Life Act

• "animal" includes amphibians, birds, mammals, and reptiles, and their young ones, and also includes, in the cases of birds and reptiles, their eggs.
• "animal article" means an article made from any captive or wild animal, other than vermin, and includes an article or object in which the whole or any part of such animal has been used and an article made therefrom.
• "hunting" includes

(a) capturing, killing, poisoning, snaring, or trapping any wild animal, and every attempt to do so (b) driving any wild animal for any of the purposes specified in sub clause (c) injuring, destroying or taking any body part of any such animal, or in the case of wild birds or reptiles, disturbing or damaging the eggs or nests of such birds or reptiles.

• "taxidermy" means the curing, preparation or preservation of trophies.
• "trophy" means the whole or any part of any captive or wild animal (other than vermin) which has been kept or preserved by any means, whether artificial or natural. This includes:
• rugs, skins, and specimens of such animals mounted in whole or in part through a process of taxidermy
• antler, horn, rhinoceros horn, feather, nail, tooth, musk, eggs, and nests and shells.
• "uncured trophy" means the whole or any part of any captive animal (other than vermin) which has not undergone a process of taxidermy. This includes a freshly killed wild animal, ambergris, musk and other animal products.
• "vermin" means any wild animal specified in Schedule V.
• "wildlife" includes any animal, bees, butterflies, crustacean, fish and moths; and aquatic or land vegetation which forms part of any habitat
• Many non-endangered species, such as Papilio buddha are also protected.

The correct answer is Degree.

Key Points

• The angle between two bonds in a molecule is called the bond angle and is measured in degrees.
• It is the angle made by three consecutive nuclei in a molecule.
• In a complex molecule or ion, the bond angle is determined as the angle between two bonding orbitals around the central atom.
• It has a value ranging between 0° to 180° and can be calculated through spectroscopic methods.
• The bond angle is affected by various factors;

1. Hybridisation of the central atom

2. Size of atoms involved

3. Presence of lone pairs

4. Multiple bonds

5. Electronegativity of the central atom

Additional Information

The logic follows here:

Rectangle angle:

Triangle:

Circle:

Hence, the correct answer is "option (1)".

The pattern follows here is:

A. BREATH : ERBHTA

B. BUBBLE : BULBEB

C. CANCEL : NACLEC

D. MARGIN : NIGRMA

E. FINGER: NIGFRE

As shown in the diagram, A and C follow the same pattern.

Hence, "A and C" is the correct answer.

The logic follows here:

So, "EJI" is the WRONG term in the following series.

Hence, the correct answer is "EJI".

The logic follows here:

2^nd number × 3 + 2 = 1^st number.

Given:

47 ∶ 15

⇒ 15 × 3 + 2 = 45 + 2 = 47 = 1^st number

Similarly,

? ∶ 19 

⇒ 19 × 3 + 2 = 57 + 2 = 59 = 1^st number

Hence, the correct answer is "59".

Given:

1. Saurabh is taller than Sandeep.

⇒ Saurabh > Sandeep

2) Amit is taller than Saurabh.

⇒ Amit > Saurabh

3) Subhash is taller than Amit.

⇒ Subhash > Amit

4) Sattu is tallest of all.

⇒ Sattu > Subhash > Amit > Saurabh > Sandeep

So, "Amit" will be exactly in the middle.

Hence, the correct answer is "Amit".