P11

Question 1

pressure equation

Answer 1

pressure (Pa) = f (N) / areas (m2)

Question 2

what is pressure

Answer 2

the force normal to a surface

Question 3

what is a pascal equal to

Answer 3

1 Pa = 1n/m2

Question 4

pressure in liquids

Answer 4

pressure increases as depth increases

Question 5

density and pressure in liquids

Answer 5

greater the density of a liquid, greater the pressure in the liquid

Question 6

height, pressure , density, gfs

Answer 6

pressure = height x density x gravitational field strength

Question 7

atmospheric pressure at high altitude

Answer 7

concentration of oxygen in air decreases with altitude

Question 8

atmospheric pressure

Answer 8

due to air molecules colliding with surfaces and creates pressure on them
density of atmosphere decreases with height

Question 9

force on flat object due to a pressure difference

Answer 9

= pressure difference x area of flat surface

Question 10

upthrust

Answer 10

the upward force water exerts on a body

Question 11

displacement of water

Answer 11

volume of water displaced equal to volume of object
the more the object is lowered into the water, the bigger volume of water displaced and bigger the upthrust

Question 12

laws of float / sink

Answer 12

object floats when weight = upthrust
object sinks when weight is greater than the upthrust

Question 13

floating

Answer 13

objects with a density lower than water float
able to tell an objects density by observing this

Question 14

variables

Answer 14

object that is more dense than the liquid sinks because its weight is greater than the weight of the liquid displaced
object floats is less dense than liquid because weight is less than weight of water displaced

Question 15

pressure factors

Answer 15

pressure at a point in a fluid depends on the density of fluid and depth of the fluid at that point