Give scientific reasons for the following: (your answers should be based on gas laws)
Balloon rises, when inflated with warm air. [2]
In summer season, chances of bursting of vehicle tyres tubes increases.
[2]
As the bubble rises to the surface in a glass of fizzy drink, it gets larger. [2]
If the tin is heated enough, the lid flies off. [2]
When you open a chilled soda, you can hardly see bubbles, bit if you open a little warmer can, bubbles spill out of the bottle. [2]
We can perform physical activity better in warmer days.
[2]
Answers
Answer:
Explanation:
1)Hot air balloons work because hot air rises. By heating the air inside the balloon with the burner, it becomes lighter than the cooler air on the outside. This causes the balloon to float upwards, as if it were in water. Obviously, if the air is allowed to cools, the balloon begins to slowly come down.
2)Pressure of the gas increases with increase in temperature. ✴In summers, the volume of air inside the tyre tube increases when it is heated up. ✴So, the air begins to expand and since sufficient space is not available in a filled tyre, it results in bursting of tyre.
3)This happens because they have a gas called carbon dioxide dissolved in them.
3)It's because the pressure in the tin can rises up.
5)Studies have found that, in addition to an increased rate of perspiration, training in the heat can increase an athlete's blood plasma volume (which leads to better cardiovascular fitness), reduce overall core temperature, reduce blood lactate, increase skeletal muscle force, and, counterintuitively, make a person
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