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• Apollo 17 was the manned spacecraft that took humans to the moon.
• Apollo 17 was the sixth and final Apollo mission to land on the Moon.
• It was crewed by astronauts Eugene Cernan, Ronald Evans, and Harrison Schmitt.

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Explanation

• A plane mirror produces a virtual image, meaning it's not a real image that can be projected onto a screen.
• The image is also upright, meaning it's not inverted or flipped.

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Isaac Newton formulated the law of universal gravitation, explaining how gravity works.

He famously described gravity after observing an apple fall from a tree.

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Young's Modulus is the ratio of stress to strain and measures stiffness of a material.

Since stress is measured in N/m² (or Nm⁻²) and strain is dimensionless, the unit remains Nm⁻².

Explanation

• Pneumatic Technology deals with the use of compressed air to transmit power, control machines.
• It perform various tasks, such as powering tools, actuators, and pneumatic conveyance systems.

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Explanation

• The wavelength of a transverse wave is the distance between two adjacent crests or troughs.
• It is a fundamental property of waves.
• It is typically denoted by the symbol λ (lambda).

Explanation

An electroscope detects the presence and type of electric charge on a body.

It shows whether the charge is positive or negative by the movement of its leaves.

Explanation

Femto (f) is a prefix in the metric system that represents 10⁻¹⁵ (one quadrillionth).

It is commonly used in physics and chemistry, such as femtoseconds (fs) = 10⁻¹⁵ seconds.