n simple terms, a <i>force</i> is a push, a pull, or a drag on an object. There are three main types of force:

An applied force is an interaction of one object on another that causes the second object to change its velocity.

A resistive force passively resists motion and works in a direction opposite to that motion.

An inertial force resists a change in velocity. It is equal to and in an opposite direction of the other two forces.

Pressure is exerted by fluids because of their weight. Static fluid pressure is exerted by the depth of the fluid, the density of the fluid and the acceleration of gravity.

The pressure due to liquid at a given depth depends upon the density of the liquid and the distance of the liquid to the bottom below the surface. The equation for fluid pressure does not depend on the shape, total mass, surface area or volume of the liquid. Pressure is calculated by dividing the weight of the liquid by its surface area in a straight column. This equation only applies to liquid in a straight column because it is easier to calculate pressure in an unobstructed column. The pressure of a liquid calculated in a shape other than a column is more difficult to calculate. Because of this, pressure is usually measured in manometers in terms of liquid column height.

Any external pressure applied to a fluid is transmitted throughout the liquid and onto the walls of the vessel containing the liquid. For instance, when liquid is exposed to an open atmosphere, the absolute pressure of the liquid is increased by the pressure of the entire atmosphere pushing down on the surface of the liquid.

Iodine is a metalloid. Metalloid elements have one or more allotropes with properties intermediate between those of a metal and a nonmetal.So iodine is lustrous.

Fluid is a substance that continually flows under an applied shear stress. Fluids are a subset of the phases of matter and include liquids, gases, plasmas, and to some extent, plastic solids.

A crop is "a plant or animal product that can be grown and harvested extensively for profit or subsistence." Crop may refer either to the harvested parts or to the harvest in a more refined state (husked, shelled, etc.). Most crops are cultivated in agriculture or aquaculture. A crop is usually expanded to include macroscopic fungus (e.g. mushrooms), or alga (algaculture).

Crop production is the science dealing with the cultivation of crops and vegetables on a field scale, either under rainfed or irrigation conditions. These crops are mainly annuals cultivated for food.

Crop production is a branch of agriculture that deals with growing crops for use as food and fiber. Degree programs in crop production are available at undergraduate and graduate levels.

Weeding is the process of removing weeds. Weed is an unwanted plant grown especially in agricultural field for example in paddy field. They exploit the fertilizers and nutrients that provided us for the paddy.hence it is harmfully affected by the rice plant.so that we want to remove the weed from the field hence it is called as weeding.

Weeds may or may not be troublesome, but removing them is required because they take up precious space, the space you would want for useful plants to grow.

Weeding means removing weeds. Weeds are unwanted plants that grow in your garden or farm or anyplace. Weeds may or may not be troublesome, but removing them is required because they take up precious space, the space you would want for useful plants to grow.

Cell is the smallest structural and functional unit of an organism, which is typically microscopic and consists of cytoplasm and a nucleus enclosed in a membrane.

The force you apply to the scale compresses a spring, which moves the needle. When you throw a baseball, you apply a force to the ball, which makes it speed up. An airplane engine creates a force, which pushes the plane through the air. A car's tires exert a force on the ground, which pushes the car along.

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Coulomb's law describes the magnitude of the electrostatic force between two electric charges. The Coulomb's law formula is:
  F = K_e * q1 * q2 / r²
Where:
  q1: Charge of object 1
  q2: Charge of object 2
  r: Distance between the two objects
  F: Force between the two objects. A positive force implies a repulsive interaction, while a negative force implies an attractive interaction
  K_e = Coulomb Constant, 8.9875517873681764 * 10⁹ N.m².C^-2

Moving at high speed along the road may produce static charges. The chain is supposed to get rid of any static electricity that builds up within the vehicle by directing it from the frame and tanks and into the ground or road. This is done to prevent the possibility of a spark occurring if someoney happens to touch the unit as the gasoline is highly flammable, even a spark could lead to an ignition source.

There are two types of twins, identical and non-identical.

Identical or monozygotic twins are formed when one egg is fertilized by one sperm which then divides into two separate embryos. Each shares exactly the same genetic components and identical genetic structures. Identical twins also share a placenta.

Non-identical or dizygotic twins form from two separate eggs being fertilised by two separate sperm. These twins are their own unique little individuals and share no more genetic composition than siblings with the same parents. Each baby in a non-identical twin pair will have its own placenta.

Another name for non-identical twins is fraternal, the other name for identical twins is non-fraternal.

The ovum is one of the largest cells in the human body, typically visible to the naked eye without the aid of a microscope or other magnification device. The human ovum measures approximately 0.1 mm in diameter.

Children look like combinations of their parents because they are. Each parent gives half of their genetic material to their children. The combination makes a unique combination of their parents genes. The scientific study of how traits are passed from parents to children is called genetics.