Which disease is caused by intestine perforation?
- Tetanus
- Tuberculosis
- Typhoid
- Cholera
Microwave and speed of light is same: 299 792 458 m / s
Infectious diseases are caused by microscopic germs
Diseases that spread from person to person are said to be contagious.
Argon is a commonly used gas used to fill incandescent light bulbs. It increases bulb life by preventing the tungsten filaments from deteriorating too quickly. Other gases such as helium, neon, nitrogen and krypton are also used in lighting.