usually in hot or warm temperatures because, hot air expands and cold does not.
No. The volume of the helium will change as it expands the balloon due to the increase in temperature. The density of an element never changes. The reason for that is because density is just a fancy way of saying 'The atoms are this far apart' in the equation mass/volume = density.
All alcohol spirits will have a warming affect on a person to help keep them warm in a cold environment.
Insulation works by slowing down heat transfer, so there isn't a specific side that is warm or cold. In a winter scenario, insulation helps to keep the warm air inside, while in summer, it helps to keep the hot air outside. The direction of heat flow determines which side feels warm or cold.
Rains associated with cold fronts tend to be shorter in duration but more intense, while rains from warm fronts are typically longer-lasting but less intense. Cold fronts move faster and have steeper slopes, leading to quick, intense rainfall followed by clearing skies. Warm fronts have more gradual slopes, resulting in longer periods of lighter rainfall.
The best insulation for cold weather to keep you warm and comfortable is typically materials like wool, down, or synthetic fibers such as Thinsulate. These materials trap heat effectively and provide good insulation against the cold.
If there is warm air in the balloon, cooler air makes the balloon rise and if there is cold air in the balloon warmer air makes the balloon fall.
When a balloon full of air is moved from a cold place to a warm place, the air inside the balloon will warm up and expand. This causes the balloon to inflate further and possibly burst if the pressure inside the balloon becomes too high.
Things which keep warm things warm and cold things cold are referred to as insulators.
Warm:)
Cold water doesn't burst at all.
When a balloon is moved from a warm to a cold temperature, the air inside the balloon cools down and contracts, causing a decrease in pressure. This pressure drop leads to the balloon deflating as the air molecules move closer together and take up less space inside the balloon.
Warm air and warm water. Cold air and cold water keep ice cooler longer.
Cold air is denser than warm air, therefore a balloon filled with cold air will weigh more than an identically sized balloon full of warm air. This extra weight causes the balloon to sink bellow warmer air. Cold air is denser than warm because as molecules become cooler they move more slowly causing them to be closer together.
Cats have fur to keep them warm when they are cold.
To insulate : To keep warm things warm and cold things cold
They get cold as they lose the ability to keep warm, and die.
Cold water is denser than warm water, so when a balloon is submerged in cold water, the pressure from the water isn't enough to inflate the balloon. The molecules in cold water are also less energetic, which means the molecules won't exert enough force to inflate the balloon.