Units and Measurements — Physics STD 11 Science — Question

Person sitting in a moving bus in uniform motion fall forward when sudden break is applied. It is due to ________.

What is the gravitational field at a point inside a spherical shell?

What is the apparent weight of a man of mass 60kg who is standing on a lift which is moving up with a uniform speed? (g = 10ms^-2)

Find the increase in pressure required to decrease the volume of a water sample by 0.01%. Bulk modulus of water = 2.1 × 10⁹N/m².

What is the excess pressure in a soap bubble of radius 10mm, if surface tension is 2.5 × 10^-2N/ m?

Explain why
When we try to close a water tap with our fingers, fast jets of water gush through the openings between our fingers.

When the skeleton of an elephant and the skeleton of a mouse are prepared in the same size, the bones of the elephant are shown thicker than those of the mouse. Explain why the bones of an elephant are thicker than proportionate. The bones are expected to withstand the stress due to the weight of the animal.

If the length of the capillary tube is less than required, will the water flow out of it?

What is the inter-atomic force in solids?