Explanation

A thermometer is used to measure temperature in Celsius or Fahrenheit.

Celsius to Fahrenheit: Use the formula F=(Cx9/5)+32

Fahrenheit to Celsius: Use the formula C=(F-32)x (5/9)

Explanation

Explanation

Geographers broadly divide the Earth into three separate climate zones: 

1. Tropical (near the Equator)
2. Temperate (north and south of the Equator)
3. Polar (the farthest Northern and Southern regions)

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

The theory of relativity usually encompasses two interrelated theories by Albert Einstein:

special relativity and general relativity, proposed and published in 1905 and 1915

E =mc2

 C in this equation Velocity of light

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Principle of Theory of relativity

ND27122022

Explanation

The Equator is the reference line for latitude and is defined as 0° latitude.

It dividing the Earth into the Northern and Southern Hemispheres.

Explanation

Microwaves are a type of electromagnetic radiation that are used to heat food in microwave ovens.

Microwaves are absorbed by water molecules in food, which increases the kinetic energy of the molecules and heats the food.

Microwaves have several characteristics that make them useful for cooking, including:

• They are reflected by metal
• They can pass through glass, paper, and plastic
• They are absorbed by food

Explanation

The force the earth attracts a body towards itself is called weight.

It is not constant but varies from place to place due to changes in the value of g

 Since it is a force, its SI unit is also Newton (N).

Explanation

Clear nights are cooler than cloudy nights because of radiation. Here's why:

• On a clear night, the Earth's surface rapidly loses heat by radiating it into space, a process known as radiative heat loss. This causes the temperature to drop.
• On a cloudy night, the clouds act as an insulating blanket, trapping heat and preventing it from escaping into space. This reduces radiative heat loss and keeps the temperature warmer.

Explanation

Surface tension acts like a stretched membrane on the water's surface, and the surface tension along the blade's edges is greater than the blade's weight.

The force of surface tension acts tangentially to the liquid surface on the circumference of the blade.