Air pressure decreases at a rate of 2.5 pascals per kilometer in the eastward direction. in addition, the air pressure is increasing at a constant rate with respect to time everywhere. a ship sailing eastward at 8 km/hour past an island takes barometer readings and records a pressure drop of 30 pascals in 2 hours. estimate the time rate of change of air pressure on the island. (a pascal is a unit of air pressure.)

5 Pa/h

Explanation:

The problem tell us that as air pressure decreases with distance, it also increases with time at a constant rate. Therefore, we have to determine in first place, what would be the decrease of air pressure due to distance:

d: total route of the ship in 2 hours

D: total decrease of pressure due to distance in 2 hours

However, the problem states that the barometer records a pressure drop of 30 pascals in 2 hours. That means, that the rate of air pressure increase due to air, could be determined as follows:

R: time rate of change of air pressure

Then, despite the decrease of air pressure due to distance, the increase due to time makes lower the drop.

! 55 !  

write a paragraph or story to explain the transformation between potential and kinetic energy as shown in your picture or model.  

you should have at least 5 complete sentences with a main idea and supporting details.  

you must include the following words:  

potential energy

kinetic energy

mechanical energy

conservation of energy

dude, this is hard lol : ))

a=d/t

a="triangle"v/t

explanation:

a = acceleration