Out of two thermos flasks of same height and capacity but one having cylindrical and the other square cross-section ,which one is better?

Two spheres of the same radii, one solid and other hollow are charged to the same potential, which one has greater charge?

There are two spheres of same material and same radius at same temperature but one being solid while the other hollow. Which sphere will expand more if they are heated to the same temperature .

A light and a heavy body have same linear momentum. Which one has greater K.E.?

Two wires of equal lengths, one of copper and the other of manganin, have the same resistance. Which wire is thicker?

Two wires of equal lengths, one of copper and the other of manganin, have the same resistance. Which wire is thicker?

Two sphere are of same mass and same external radius, one is solid and the other is hollow. Which one of them has larger moment of inertia about its diameter?

Two spheres are made of same metal had and have same mass. One is solid and the other is hollow. When heated to the same temperature, percentage increase in diameter will be

A toy is in the shape of a right circular cylinder with a hemisphere on one end and a cone on other. The radius and height of the cylindrical part are5cm and13cm respectively. The radii of hemisphere and conical parts are the same as that of the cylindrical part. Find the surface area of the toy if the total height of the conical part is12cm.

Two electric bulbs have tungsten filaments of the same length. If one of them is rated 60 watt and the other 100 watt then which one has thicker filament wire?