A boat has a pressure difference between top and bottom of 100 N/m2.
The area is 5 m2.
What is the weight of the boat ? N
How is the upthrust = N

If a 500 N child climbs in the new pressure = N/m2.

i think it is non rem sleep

a.   mass number from atomic number

the only real purpose of sputnik 1 was to beat the us into space. we were getting close to launching a useful satellite, explorer 1 - which launched on january 31, 1958. the ussr had to beat that, so they launched sputnik 1 on october 4, 19