Explanation

Goiter is a disease in which the thyroid gland present in neck enlarges, resulting swelling in the neck. 

Goiter means گلہڑ

Explanation

The stratosphere is a layer of Earth's atmosphere. It is the second layer of the atmosphere as you go upward. It is present about 30miles (50km) in atmosphere above earth.

Explanation

• Chlorophyll is a compound that is called a Chelate. 

  Photosynthesis depends on the presence of chlorophyll for the absorption of light.

  There are about five closely related chlorophylls:

  1. chlorophyll a
  2. chlorophyll b
  3. chlorophyll c
  4. chlorophyll d
  5. chlorophyll e
  6. chlorophyll f

Explanation

Solar PV cells generate electricity by absorbing sunlight and using that light energy to create an electrical current.

There are many photovoltaic cells within a single solar panel, and the current created by all of the cells together adds up to enough electricity to help power your home

Explanation

Sound travels at approximately 1,100 feet per second (766 miles per hour).

Radio waves travel at the speed of light, which is approximately 186,000 miles per second.

Explanation

Angina pectoris is the medical term for chest pain or discomfort due to coronary heart disease.

It occurs when the heart muscle doesn't get as much blood as it needs.

This usually happens because one or more of the heart's arteries is narrowed or blocked, also called ischemia

Explanation

Ole Rømer, an astronomer from Denmark made the first quantitative measurements of the speed of light in 1676.

Explanation

 Titanium element has an atomic number of 22 and a mass of 47.90

Explanation

The speed of sound is the distance travelled per unit of time by a sound wave as it propagates through an elastic medium.

Explanation

Magnetic effect.

Chemical effect.

Heating effect.

Electric shocks.