Forces In Fluids Section 1

As depth increases in a body of water, the weight of the water above exerts more pressure on the water below, causing the water pressure to increase. This is because the force due to gravity increases with depth. Therefore, it is true that water pressure increases as depth increases.

In a fluid that is not moving, the pressure at a given point is exerted equally in all directions. This is because the fluid particles are in equilibrium, meaning that the forces acting on them are balanced. As a result, the pressure is distributed evenly in all directions, regardless of the orientation of the surface.

The correct answer is pascal. The pascal is the SI unit of pressure. It is defined as one newton per square meter. It is named after the French mathematician, physicist, and philosopher Blaise Pascal. The pascal is commonly used in various fields such as physics, engineering, and meteorology to measure pressure.

A substance that can easily flow is referred to as a fluid. Fluids have the ability to flow and take the shape of their container, as they do not possess a definite shape or volume. They can be either liquids or gases. The term "fluid" encompasses a wide range of substances, including water, air, oil, and many others.

The pressure exerted by a fluid is determined by dividing the total force exerted by the fluid by the area over which the force is exerted. In other words, pressure is calculated by taking the force and dividing it by the area. The larger the area over which the force is spread, the lower the pressure will be, and vice versa. Therefore, the correct answer is "area" or "total area" as both terms refer to the surface over which the force is distributed.

The statement is incorrect. As elevation increases, the air pressure decreases. This is because the atmosphere becomes less dense at higher altitudes, resulting in lower air pressure. As we go higher in the atmosphere, there are fewer air molecules above us, leading to a decrease in pressure. Therefore, the correct answer is false.

Force and pressure are not the same thing. Force refers to the push or pull applied to an object, while pressure is the force applied per unit area. Force is a vector quantity, meaning it has both magnitude and direction, whereas pressure is a scalar quantity, only having magnitude. Therefore, force and pressure are distinct concepts in physics.

Air pressure refers to the force exerted by the weight of air molecules in the Earth's atmosphere. It is commonly known as atmospheric pressure because it is the pressure exerted by the Earth's atmosphere on any given point. The term "atmospheric pressure" is used to describe the pressure exerted by the air surrounding us, which plays a crucial role in weather patterns, climate, and various natural phenomena.

The given answer is correct because helium gas, liquid water, and air are all examples of fluids. Fluids are substances that can flow and take the shape of their container. Helium gas is a fluid because it can fill and flow within a container. Liquid water is a fluid because it can flow and take the shape of its container. Air is also a fluid because it can flow and fill spaces. Ice, on the other hand, is not a fluid because it is a solid and does not flow like liquids or gases.

The correct answer is 1 pascal and 1 newton per square meter. Pascal is the SI unit of pressure, defined as one newton of force per square meter of area. Therefore, 1 pascal is equal to 1 newton per square meter.