Final answer:
The pressure at a depth of 1 km underwater is not 100 Pascals; rather, it is around 100 atmospheres from the water column plus 1 atmosphere of atmospheric pressure. This sum equates to approximately 10,132,500 Pascals plus the atmospheric pressure of 101,325 Pascals, following Pascal's Principle of pressure addition in fluids.
Step-by-step explanation:
The question about whether a water pressure of 100 is pressure in Pascals at a depth of 1km underwater relates to the concept of pressure in fluids, which is a topic discussed within the realm of Physics. To understand the pressure at this depth, we need to consider both the pressure exerted by the water column and the atmospheric pressure above the water surface.
As a general rule, every 10 meters of water depth adds approximately one atmosphere of pressure. At a depth of 1 km, which is 1,000 meters, we would expect the pressure from the water alone to be around 100 atmospheres, because 1,000 m / 10 m/atm = 100 atm. However, to get the total pressure at this depth, we need to add the atmospheric pressure acting on the water's surface, which is approximately 1 atm. Thus, the total pressure would be 101 atmospheres. It's important to remember that 1 atm is equal to 101,325 Pascals (Pa), therefore, the pressure in Pascals would be 100 atm * 101,325 Pa/atm = 10,132,500 Pa, plus the atmospheric pressure of 101,325 Pa.
Additionally, according to Pascal's Principle, fluid pressures add together, so at a depth of 1 km, the total pressure would indeed be the sum of the pressure from the water column and the atmospheric pressure.