outside the refrigerator is P1 = 101325 Pa
inside the refrigerator is P2 = 94412 Pa
The difference between inside and outside pressure = 6913 Pa
1 Pa = 1 N/m2 where N is newton and m is meter
Since the door is 1m2 the force to open = 6913 N
Alternatively I could have said
outside the refrigerator is P1
= 101325 Pa
inside the refrigerator is P2
= 94412 Pa
1 Pa = 1 N/m2
where N is newton and m is meter
Since the door is 1m2
the force outside the refrigerator is 101325 N
the force inside the refrigerator is 94412 N
The difference between these forces is 6913 N
which is the force necessary to open the door
Is the second way a better way of presenting the results,since the final answer in both is the same?
is my physics rusty
For me it would have been useful to couch what the force would be like by stating in lifting of grams against gravity. I do not have a since in my mind about newtons.
The newtons are for opening the door feel the same as lifting a
gram weight against gravity.
do you want to fill in the grams?