Explanation

Steel is more elastic than rubber because the ratio of stress to strain is more for steel.

This indicates that steel deforms less under the same amount of stress compared to rubber, making it more elastic.

Explanation

Energy is measured in units of kilocalories

One kilocalorie  is equal to 4.18 kilojoules.

The amount of energy a food contains per gram is known as its energy density,

So we can describe fat as more energy-dense than protein or carbohydrate.

Explanation

The SI unit of electric charge is the coulomb, represented by the symbol C.

One coulomb is the amount of charge that passes through a conductor carrying one ampere of current for one second.

It's also equal to the charge of about 6.24 quintillion electrons or protons.

Explanation

J.J. Thomson discovered the electron in 1897 through his experiments with cathode rays.

The proton was discovered by Ernest Rutherford.

The neutron was discovered by James Chadwick.

Explanation

The most abundant gas in the atmosphere is nitrogen, with oxygen second.

Argon, an inert gas, is the third most abundant gas in the atmosphere.

Explanation

The ampere, symbol A, is the SI unit of electric current.

It is defined by considering the fixed  value of the elementary charge e as 1.602 176 634 x 1019,

where the unit C is equal to As and the second is defined by Δν Cs.

Explanation

The intensity of an earthquake is measured by the Richter scale.

It quantifies the energy released.

It was developed in 1935.

The Richter scale is used in seismology, the study of earthquakes.

Explanation

• There are around 639 skeletal muscles.
• The three main types of muscle include skeletal, smooth, and cardiac.
• The sartorius muscle is a thin, long, superficial muscle in the anterior compartment of the thigh.

Explanation

Silicon is a metalloid with properties ideal for controlling electrical current.

It's the most widely used material in semiconductor devices like transistors and chips.

Explanation

• Plastic is a synthetic material that is resistant to decomposition and can take hundreds or even thousands of years to break down.
• It is a non-biodegradable material.

The examples of non-biodegradable materials such as:

• Inorganic materials (glass, ceramics, heavy metals)
• Synthetic materials (styrofoam, plastic bags, other plastic things)
• Hazardous materials (detergents, toxic chemicals)
• Industrial waste (empty cans, electricity wires, fused bulbs, broken machine parts)