Why a heavy weight is easy to lift in water? In water, an upward force or buoyancy acts on any heavy object. For this reason a heavy object appears lighter when immersed in water and it becomes easy to lift it. Air is at rest will absorb same heat from our body. But being wet … Read more
Why we do not feel the atmospheric pressure? The blood pressure inside our body is slightly larger than atmospheric pressure and the pressure acts along every direction equally. That’s why we don’t feel any pressure.
What is called the apparent expansion of liquid? The expansion of the liquid without considering the expansion of the container is called apparent expansion.
What is Torricelli’s vacuum? If a one meter long glass tube opened at one end filled with mercury is put into a mercury filled container invertedly and perpendicularly due to air pressure the mercury level comes down. At a certain level it becomes steady which means a portion of tube’s upper area becomes vaccum. This … Read more
If an object is put into still water and the amount of replaced water by the object is less than objects mass it will down, if the replaced water has same mass as the object it will float while its body will be fully drowned. Again, if the amount of replaced water is more than … Read more
The conditions of the floating or sinking of an object are- If W1>W2, or if the weight of the object is more than liquid abstracted by the object then the object will sink in the liquid. If W1=W2, or if the weight of the object is equal to the liquid abstracted by the object will … Read more
How can you understand that a slide callipers has an instrumental error? The forth state of substance is plasma. This plasma is the ionized gas in very high temperature. A massive source of plasma is sun. Also other states are sources of plasma. Plasma state is generated in a state of few thousand degree Celsius … Read more
Law of increasing force If at the smallest portion of a liquid some force is applied with a piston, than the bigger pistons will feel a much greater force than the applied force.