The two-layered sac surrounding the heart is the pericardium.
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I believe the statement would be that, A magnetic field created by the electric current causes the compass needle to move.
An electric current through a conductor creates a magnetic field,such that when a charged particle such as an electron, proton, or ion is in motion, magnetic lines of force rotate around the particle. Since current moving through the wire consists of electrons in motion, there is a magnetic field around the wire, which causes the compass needle to deflect.
All i know is 'hat, it is composed of three layers
In general, the warm to hot summers and relatively mild winters of the Mediterranean and humid subtropical climates are similar. More people live in humid subtropical regions, which are occasionally invaded by chilly air in the winter.
Overall, this region's winter temperatures are typically 10 to 20 degrees Fahrenheit cooler than those in Mediterranean regions.
Whether or whether the summers are hot or warm in a region with a Mediterranean climate determines the subcategory. In comparison to the dry summer heat of the Mediterranean climate zones, the summers in the humid subtropical zone are equally warm or hot, but they typically have significantly more humidity, resulting in sultry weather that generally feels more uncomfortable.
What is humidity?
The amount of water vapor in the air is known as humidity. The gaseous form of water, known as water vapor, is typically undetectable to the eye. The presence of precipitation, dew, or fog is predicted by the humidity.
The temperature and pressure of the system of interest affect humidity. In comparison to warm air, cool air has a higher relative humidity when the same amount of water vapor is present. The dew point is another relevant variable. As the temperature rises, more water vapor is required until saturation is reached. A parcel of air will eventually approach saturation as its temperature drops, without adding or losing water mass. A parcel of air can include a wide range of water vapor concentrations.
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