FreeNotes
On Earth, sucking through a straw reduces air pressure inside, allowing atmospheric pressure to push liquid up. On the Moon, there is no atmospheric pressure, so there is no external force to push the liquid into the straw, making it impossible to sip water. Related Questions: How are we able to break a metal wire … Read more
In a barometer, the height of the liquid column is determined by the balance between the weight of the liquid column and the atmospheric pressure. The relationship between the height of the liquid column and the density of the liquid is given by the following equation: P=ρgh Where: P is the atmospheric pressure, ρ\rho is … Read more
In space, there is no atmospheric pressure, which can cause body fluids to boil due to low external pressure. The airtight layer of a space suit maintains constant pressure, ensuring astronauts can breathe and preventing their bodies from expanding due to the vacuum. It also protects against extreme temperature variations. Related Questions: How are we … Read more
When air is blown into a balloon, it increases the pressure inside due to compressed air molecules. When tied, the air remains trapped, maintaining internal pressure. The balloon stays inflated because the internal pressure balances with the external atmospheric pressure, preventing air from escaping unless punctured or untied. Related Questions: How are we able to … Read more
A thumb pin has a sharp, pointed end and a wide, flat head. The pointed end has a small surface area, which concentrates force and increases pressure, allowing it to penetrate surfaces with minimal effort. The flat head provides a large area for applying force, making it easy to push in. Related Questions: How are … Read more
Jumping exerts more pressure than standing still because pressure depends on force and area. When jumping, the force increases due to acceleration and impact upon landing. This momentarily increases pressure on the trampoline, causing greater deformation. Standing still distributes body weight evenly, exerting less pressure compared to the impact during a jump. Related Questions: How … Read more
A small car lifter operates based on Pascal’s law, which states that pressure applied to a confined fluid is transmitted equally in all directions. A hydraulic system in the lifter consists of a small input piston and a larger output piston. When force is applied to the small piston, it creates pressure in the fluid, … Read more
In a static fluid, the molecules are in constant random motion, colliding in all directions. When a surface is placed within the fluid, the pressure at any point arises due to the weight of the fluid above it and molecular collisions. These collisions exert forces equally in all directions, but the net force on any … Read more
When a spring of constant k is cut into two equal parts, each part becomes stiffer because the same force causes a greater displacement in a shorter length. The spring constant of each half is given by k’ = 2k. This means that when one of the halves is loaded with the same mass m, … Read more
When a metal wire is bent repeatedly, it undergoes cyclic stress that weakens its internal structure. Every time it is bent, microscopic cracks develop at the stressed points. These cracks propagate further with each bend, reducing the wire’s strength. Eventually, the accumulated stress surpasses the material’s endurance limit, leading to fracture. This phenomenon is known … Read more