Solid pressure
If you increase .......... pressure will decrease
Area (m2 )
TRUE OR FALSE?
Pressure in liquids depend on gravitational attraction of Planet
True
True or false?
Density of object is will reduce if object heated.
True
Because more distance between particles.
True or false?
Pressure of liquid and pressure of solid have different units
False
both of them are pressure. So their units same
(Pa and N/m2 )
Compare density of Aliminium and Mercury
Mercury more denser
Aliminium less denser
Name two units for pressure
Pa N\m2
True or False?
Pressure in liquid acts in ALL DIRECTIONS
True
true or false?
air can not be compressed
False
you can fit air particles into smaller volume
It’s very dense (13.6 g/cm³)
It doesn’t easily evaporate at room temperature.
It a liquid metal
Mercury
Find 15 percent of 8000
1200
True or false?
If you know Pressure ,Height and Width (ширина) you can define Force of object.
False
(Pressure, length and width)
What happens to liquid pressure when you go deeper?
It increases.
Instrument which measure atmospheric pressure
Barometer
In Boyle's law ( P1*V1=P2*V2) Which physical quantity should be constant?
Temperature
Calculate Pressure under block of mass 0.06 kg if its surface Area 25 cm2
2.4 Pa
Complete with suitable word
Skis have large area to ....................pressure on snow, so that they dont sink in too far.
Reduce (azaituu)
Two containers are filled with water to the same depth.
Container A has a wide base.
Container B has a narrow base.
Which container has the greater water pressure at the bottom?
Both are the same — pressure depends only on height, not shape.
(wide or thin doesnt matter)
Circle correct word:
Pressure becomes less/more/does/remains same as you rise up to mountain
Less
True or false?
pressure and volume directly proportional
(if volume increase,pressure increase)
(False)
Pressure and Volume are inverse proportional
8.30 *10-5 kPa
How many Pascal?
8.30×10-5kPa= 8.30×10-5×103 Pa
=8.30×10-2 Pa
or 0.083 Pa
A brick of mass 2 kg and dimensions 10 cm by 15 cm by 20 cm rests on the ground. Calculate the maximum pressure in N/cm2 that it can exert on the ground.
0.13 Pa (rounded)
A plastic bottle full of water has a small hole near the bottom. Why does water come out fast?
Because pressure is bigger at the bottom of the bottle.
weight of liquid above pushes down because of gravity
What height of mercury column is needed in a barometer to balance atmospheric pressure?
76 cm or 0.76 m
Why atmospheric pressure at lowest point is greatest (more) ?
Because weight of all air above.
(weight of upper air particles push down, so lower part is more concentrated)
Mass of elephant:
4000 kg
Height of Elephant:
3 m
Area of one foot:
0,25 m2
By using information above Calculate Pressure of Elephant.
1) F=mg =4000⋅10= 40000N
2) A=4⋅0,25=1м2
3) P=40000Па=40kPa=40N/сm2