A contactor joins 2 poles together, without a common circuit between them, while a relay has a common contact that connects to a neutral position. Additionally, contactors are commonly rated for up to 1000V, while relays are usually rated to only 250V. Why use a relay instead of a contactor?Relays are switching devices used in any control circuit for checking a condition or multiplying the number of contacts available. Contactors are switching devices used to control power flow to any load.

Ectotherm vs Endotherm   Thermoregulation is the process that enables life to exist in an amazingly wide range of the thermal environment and enhances their ecological and geographical distribution on earth. It is the process by which an animal regulates and maintain its body temperature. Depending on the way of temperature regulation, there are two types of animals; namely, ectotherms and endotherms. Endotherms are also called homoitherms or warm-blooded animals, whereas Ectotherms are also known as poikilotherms or cold-blooded animals.

Main DifferenceOsmosis and diffusion are the scientific term used in chemistry and biology. Diffusion is the movement of molecules form the region of a higher concentration to a region of lower concentration. Osmosis is the movement of molecules from the region of higher concentration to a region of lower concentration through semi permeable or selectively permeable membrane or layer. DiffusionDiffusion is the movement of molecules form the region of a higher concentration to a region of lower concentration.

The key difference between soluble and insoluble salts is that soluble salts can dissolve in water at room temperature, whereas insoluble salts cannot dissolve in water at room temperature. A salt is any compound formed from the reaction between an acid and a base. Therefore, a salt essentially contains an anion (comes from the acid) and a cation (comes from the base). We can divide salt compounds into two types depending on their water solubility at room temperature.

The main difference between prokaryotic and eukaryotic chromosomes is that the prokaryotic chromosomes are short, circular DNA molecules whereas the eukaryotic chromosomes are long, linear molecules. Furthermore, prokaryotic chromosomes occur in the cytoplasm while eukaryotic chromosomes occur inside the nucleus. Moreover, prokaryotes contain a single chromosome per cell while the number of chromosomes in eukaryotes depends on the species.  Prokaryotic and eukaryotic chromosomes are two organizations of cellular DNA for packing inside the cell. Double-stranded DNA makes up both types of chromosomes.

The main difference between Zumba and aerobics is that Zumba refers to a mode of workout that incorporates aerobics with Latin dance movements, whereas aerobics is basically a planned workout on every part of your body individually. In brief, Zumba is a favorable choice for dancing lovers, whereas aerobics addresses your needs regarding building up muscles and muscle training. Both Zumba and aerobics are effective workouts that help you to shed a lot of calories (600-800 calories per hour).

What Is Weathering? Weathering describes the breaking down or dissolving of rocks and minerals on the surface of Earth. Water, ice, acids, salts, plants, animals and changes in temperature are all agents of weathering. Weathering and erosion constantly change the way the rocky landscape of Earth. No rock on Earth is hard enough to resist the forces of weathering and erosion. Weathering wears away exposed surfaces over time. The length of exposure often contributes to how vulnerable a rock is to weathering.

Los eclipses solares son el resultado de que la Luna bloquea al Sol en relación con la Tierra; por lo tanto, la Tierra, la Luna y el Sol se encuentran en una línea. Los eclipses lunares funcionan de la misma manera en un orden diferente: la Luna, la Tierra y el Sol, todos en una línea. En este caso, la sombra de la Tierra oculta la Luna a la vista..

Millions of years from now nobody could ever think that humans can travel through the sky, humans were limited to land and water transport. But gradually modernization took over and we can see the result by ourselves, humans have made the impossible possible. The Airline is one such example, it is an establishment that provides regular public air transportation service on different route. AirAsia vs VistaraThe main difference between Air Asia and Vistara is that Air Asia flights are for customers who are looking for budget-friendly flights.

Key Difference: First name is the name given to a person and is used as the main identification attribute for the person. It is generally given at birth or baptism. First name is also known as forename. Family name is preceded by the first name and this family name is also known as surname or last name. First name and family name both are important to a person's identity. First name is the given name or the forename.