Explanation

According to the World Health Organization (WHO), the industrial limit of sound in industries must be 75 dB (Decibels).

Explanation

• The Earth rotates on its axis, completing one full rotation in 24 hours.
• This is the equivalent of 1,440 minutes or 86,400 seconds.
• This rotation is what gives us day and night, as different parts of the planet face towards or away from the Sun.

Explanation

A compound machine is a machine that is made up of two or more simple machines.

A bicycle, a crane, wheel borrow and scissors are examples of compound machines because they are made up of multiple simple machines, such as:

• Wheels and axles (simple machine: wheel)
• Pedals and levers (simple machine: lever)
• Gears and pulleys (simple machine: pulley)
• Inclined planes (simple machine: inclined plane)

Explanation

Force cannot change the content of an object, as it only affects the object's motion, shape, and position, but not its composition or internal structure.

Explanation

Explanation

Alpha (α) radiation consists of heavy, positively charged particles (alpha particles) that are emitted from the nucleus of an atom during certain types of radioactive decay.

Alpha particles are highly ionizing, meaning they can efficiently remove tightly bound electrons from atoms, resulting in the formation of ions.

Explanation

A simple bar chart is also called a pillar diagram or simple column chart. 

It is the most basic type of bar graph, used to compare discrete categories of data using rectangular bars of equal width.

When presented with vertical bars, it is commonly referred to as a column chart. 

Explanation

In many statistical contexts (like cumulative distribution functions), the distribution is always increasing or non-decreasing, because probabilities accumulate as you move across the range.

Explanation

• A pulley is a simple machine that uses grooved wheels and a rope to raise, lower, or move a load.
• It changes the direction of the force, making it easier to lift or move heavy loads.
• Examples: Raising a load and A flag pulley.

Explanation

• Axe, Knife, and Push pin are all examples of wedges, as they are used to split, separate, or lift things.
• Ramp is an inclined plane used to lift or move heavy objects, but it is not a wedge.