Systems of Particles and Rotational Motion — Physics STD 11 Science — Question

A cloudy night is hotter than a clear sky night. Why?

A scooter weighing 150kg together with its rider moving at 36km/ hr is to take a turn of radius 30m. What horizontal force on the scooter is needed to make the turn possible?

There are equal number of molecules of hydrogen and oxygen in a box. If a tiny hole is made in the box, which gas will leak out rapidly and why?

In a calorimeter, the heat given by the hot object is assumed to be equal to the heat taken by the cold object. Does it mean that heat of the two objects taken together remaina constant?

Why does the brake drum of an automobile get heated up while moving down at constant speed?

If the magnetic field outside a copper box is suddenly changed, what happens to the magnetic field inside the box? Such low-resistivity metals are used to form enclosures which shield objects inside them against varying magnetic fields.

How many newton make one kg wt.?

Write the work energy theorem.