Explanation

Water has maximum density at 4°C.

When Water is in its Solid form (Ice) below 0°C.

Explanation

The penetration power of the X-rays depends  on the wavelength and frequency of X-rays

The penetration power of the X-rays will be more when the energy of the X-ray is more.

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Related Question:

Explanation

Silicon (Si) is the element most commonly used to fabricate solar cells and transistors.

Silicon is a semiconductor material that is widely used in the production of electronic components, including:

• Solar cells (photovoltaic cells)
• Transistors
• Microprocessors
• Diodes

Explanation

When the soap is in the form of micelles then it has the ability to clean the oily dirt which gets accumulated at the centre.

These micelles remain as colloidal solutions.

Therefore, the dirt from the cloth is easily washed away.

Explanation

Steel is most elastic among the rubber, steel, glass and sponge.

Steel having the most steep linear stress-strain curve among all.

A stiffer material will have a higher elastic modulus.