Answer :
We can approximate 1 atm by 100 kpa. if a tire's gage pressure is 200 kpa. The absolute pressure in the tire would be 300 kPa.
The pressure in a tire is expressed in terms of gauge pressure and absolute pressure. Gauge pressure is the pressure measured relative to the atmospheric pressure, whereas absolute pressure is the pressure measured relative to a perfect vacuum.
One atmospheric pressure is commonly defined as 100 kPa, so we can approximate 1 atm to be 100 kPa. If a tire's gauge pressure is 200 kPa, it means that the tire pressure is 200 kPa above atmospheric pressure. To convert this gauge pressure to absolute pressure, we add it to the atmospheric pressure of 100 kPa. Thus, the absolute pressure in the tire would be 200 kPa + 100 kPa = 300 kPa.
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