Explanation

The force is acting along the y-axis only, so it has no component along the z-axis.

Answer: 0 N

Explanation

• Coal, fossil fuels, crude oil, natural gas, etc are all hydrocarbon fuels.
• These are called as non-renewable source of energy because they take millions of years to regenerate themselves.
• Water energy is renewable because it is regenerated by water cycle.
• Also wind energy and solar energy are renewable sources of energy.

Explanation

The energy equivalent of 1 atomic mass unit (a.m.u) is given by Einstein's mass-energy equivalence formula E = mc².

1 a.m.u = 931 MeV/c², so the energy equivalent is 931 MeV.

Explanation

A seismograph is an instrument used to detect and record earthquakes.

It consists of a mass attached to a fixed base

During an earthquake, the base moves and the mass does not.

Explanation

Hydroelectric power is considered the cheapest and most environmentally friendly source of electricity.

As it utilizes the energy from flowing water without emitting greenhouse gases.

Explanation

An electric generator works on the principle of electromagnetic induction.

Faraday's law states that a changing magnetic flux induces an emf, which is the working principle of generators.

Explanation

Explanation

The transfer of thermal energy from one substance to another that requires no physical medium is called radiation.

Radiation is the process by which thermal energy (heat) is transferred through electromagnetic waves, such as infrared radiation. 

They can occur in a vacuum, such as in the transfer of heat from the Sun to the Earth.

Unlike conduction and convection, which require a physical medium (solids, liquids, or gases), 

Explanation

Cations are positively charged ions. 

Cations are formed when a metal loses its electrons.

Explanation

Fathom is used to measure the depth of water or the length of a nautical rope or cable.

A fathom is six feet, or 1.8288 meters.