Why is it easier to start a car engine on a warm day than on a chilly day ?

It is easier to maintain the motion of a body than to start it. Why?

Explain why: a brass tumbler feels much colder than a wooden tray on a chilly day

It is easier to catch, a table tennis ball than a cricket ball even when both are moving with same velocity. Why?

Why do electrostatics not work well in humid days ?

It is easier to revolve a stone by attaching it to a shorter string rather than- to a longer one. Why?

Explain why Aquatic species are more comfortable in cold water rather than in warm water.

Explain why: )heating systems based on circulation of steam are more efficient in warming a building than those based on circulation of hot water

A cottage industry produces a certain number of pottery articles in a day.It was observed on a particular day that the cost of production of each articles (in rupees)was 3 more than twice the number of articles produced on that day.If the total cost of production on that day was Rs.90,find the number of articles produced and the cost of each articles.