Physics, 01.11.2019 01:31 DavidYSD46481
At a fixed depth within a fluid at rest, the pressure pushing upward is
a) less than the pressure pushing downward.
b) zero, because pressure only pushes equal in all horizontal direction
c) zero, because the fluid above does not support the weight of the fluid below
d) greater than the pressure pushing downward
e) equal to the pressure pushing downward
salt water has greater density than fresh water. a boat floats in both fresh water and salt water. where is the buoyant force greater on the boat?
a) salt water.
b) fresh water.
c) buoyant force is the same in both.
d) cannot be determined from the information given
Answers: 3
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Aballoon is rising vertically upwards at a velocity of 10m/s. when it is at a height of 45m from the ground, a parachute bails out from it. after 3s he opens his parachute and decelerates ata a constant rate 5m/s.when. (a) what was the height of the parachutist above the ground when he opened his parachute? (b)how far is the parachutist from the balloon at t=3s? (c)with what velocity does the parachutist hit the ground? (d)after how long does the parachutist hit the ground after his exist from the balloon?
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At a fixed depth within a fluid at rest, the pressure pushing upward is
a) less than the...
a) less than the...
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