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Why would your temperature gage read about 100 degrees while running for about 1 hour but when you turn the engine off it will reads about 200 degrees?
While the engine is running, the water is constantly circulating through the block, taking heat out of it, dumping the heat in the radiator with the help of the fan, then going back to the block once it's cool again. That's the way everything is designed to work, in order to carry heat out of the engine block and prevent it from glowing red and melting itself. When you turn the engine off, the water pump stops turning, and the circulation stops. The water that's inside the engine just sits there, and comes up to the temperature of the surrounding block, before the whole thing eventually cools down.
Which type of signal follows a straight line and does not bend with the curve of the Earth?
No electromagnetic signal travels straight through the atmosphere, except during the rare conditions when the atmospheric refractivity is the same at every altitude. Since the refractivity depends on the temperature, humidity, and pressure of the air, you can imagine how rarely that quantity is constant with altitude. When refractivity changes with altitude, the path taken by a beam of radio or light curves as it proceeds along its path. The exact nature of the curve depends on exactly how fast the refractivity changes with altitude at the time. Occasionally but not often, it curves up from a straight path. Most often, it curves down from a straight path, anywhere from slightly to drastically. It doesn't necessarily follow the curve of the earth's surface. Most often, the earth curves down faster than the signal does. It's possible for the signal to curve down exactly as fast as the earth does, and its path remains parallel to the surface. Occasionally, the signal curves down faster than the earth's curvature, and it returns to the ground some distance from the antenna or the flashlight where it started. That situation happens more often in desert regions, where the ground cools rapidly at night. Since the human eye and brain believe that an object is located in the direction from which its image comes, these atmospheric conditions in the desert lead to sightings of oases in the sky and other 'mirages'. It's no accident that the legends of flying horses and magic carpets originated in the harshest deserts. As you may have noticed, this stuff fascinates me. Thanks for the question.
When a substance cools kinetic energy causing the speed of the molecules to?
decreases; increase
Why does the density of liquid increase as it cools?
As something cools down, the kinetic energy of its molecules decrease. This corresponds to a decrease in volume occupied of the substance, so the density decreases.
When a substance cools off what type of energy is it losing?
When a substance cools off, it is primarily losing thermal energy in the form of heat to its surroundings. The molecules inside the substance lose kinetic energy, resulting in a decrease in temperature.
What decreases as air heats up and increases as air cools?
As air heats up, its density decreases, because the air molecules move further apart due to increased kinetic energy. Conversely, as air cools down, its density increases, as the air molecules move closer together due to decreased kinetic energy.
How does evaporation from a liquid cool it down?
Evaporation cools a liquid down because the molecules with the most kinetic energy are the most likely to evaporate, leaving behind the slower-moving molecules, which results in an overall decrease in the average kinetic energy of the remaining liquid molecules. This decrease in kinetic energy corresponds to a decrease in temperature.
What happens to a sample of matter when its particles lose kinetic energy?
A loss of kinetic energy in the atoms or molecules of a sample of matter will result in the cooling of the sample. That sample will get colder as remove thermal energy from it. The atoms/molecules of a substance have kinetic energy associated with them. This kinetic energy is the result of atomic and/or molecular motion. As a sample of matter cools, the atoms and/or molecules will lose mobility. Loss of mobility and vibrational energy, which are forms of kinetic energy, will become apparent when thermal energy is removed from the sample.
What cools during evaporation?
Evaporation is a cooling process for a surface because energy is removed from the water as molecules escape the surface. This causes the surface temperature to decrease.When evaporation is taking place we say there is a positive latent heat flux.
Why does a beaker of hot water gets denser when it's cooled?
Water molecules are more spread out and have higher kinetic energy when they are hot, causing them to occupy a larger volume and hence be less dense. When the water cools down, the molecules lose kinetic energy, move closer together, and occupy a smaller volume, resulting in higher density.
How do you explain evaporation using particle theory?
Evaporation occurs when water molecules at the surface of a liquid gain enough kinetic energy to break free from the liquid's surface and become a gas. This process is explained by particle theory as the higher-energy water molecules break away from the liquid and escape into the air, leaving behind lower-energy molecules, which cools the remaining liquid.
What happening to the motion of the particles in the soup as it cools?
As the soup cools, the motion of the particles decreases. This is because the particles lose kinetic energy due to the decrease in temperature. With lower kinetic energy, the particles move more slowly, eventually leading to a solidification of the soup if it becomes cold enough.
What happens to a liquid . When it releases energy?
The liquid cools down. Its molecules move more slowly.
What are the 3 major steps of evaporation?
Energy is absorbed by water molecules, causing them to gain enough kinetic energy to escape the liquid phase. The water molecules then break free from the surface of the liquid and enter the surrounding air as water vapor. The vapor rises into the atmosphere and eventually cools and condenses to form clouds or falls back to the Earth as precipitation.
