Sand is thrown on tracks covered with snow in hilly areas. Why ?

"In hilly areas, sand is thrown on tracks covered with snow ". Why ?

How does sprinking of salt help in clearing the snow covered roads in hilly areas? Explain the phenomenon involved in the process.

How does sprinking of salt help in clearing the snow covered roads in hilly areas? Explain the phenomenon involved in the process.

Walking becomes difficult, When the ground is covered with snow or sand this is because

Why the food does not cook properly at hilly areas?

A light metal disc on the top of an electromagnet is thrown up as the current is switched on. Why? Give reason.

Sand is dusted on the railway tracks during rainy season to

The National Forest Policy of India has recommended ____ percent forest cover for hilly areas.

Why annual rings are comparatively well marked in plants growing in hilly areas than those in coastal areas ?