Explanation

• The planet that moves around the Sun at the largest speed is Mercury
• ***
• Mercury is the fastest planet, which speeds around the sun at 47.87 km/s.
• In miles per hour, this equates to a whopping 107,082 miles per hour.

Explanation

The age of a tree is determined by counting its growth rings (annual rings) in the trunk.

Each ring typically represents one year of growth.

Explanation

The SI prefix Tera (T) represents 10¹².

Commonly used in measurements like terabytes (TB).

Explanation

According to Ohm’s Law, current equals voltage divided by resistance.

Unit of current is ampere (A).

Explanation

Filler metal is added in gas welding to join two metal pieces and fill gaps.

It melts along with the base metal to form a strong welded joint.

Explanation

Drop forging uses a heavy hammer dropped onto the workpiece to shape it under impact.

This process improves strength and grain structure of the forged component.

Explanation

Stamping involves pressing or punching metal sheets into desired shapes using dies.

It is widely used in automobile panels, appliances, and metal components.

Explanation

Saddle keys are simple, lightly loaded keys used for light-duty work.

They are easy to fit and do not require machining of the shaft.

Explanation

Cold rolling induces plastic deformation at room temperature, leading to residual stresses.

Forged, hot-rolled, and cast shafts generally have lower residual stresses due to high-temperature processing.

Explanation

Amalgams are alloys in which mercury is a principal component.

They are commonly used in dental fillings and some industrial applications.