23 questions
What is the pressure equation?
Pressure = Force x Area
Pressure = Force ÷ Area
Pressure = Area ÷ Force
Pressure = Area2 ÷ Force
If a piston has a face of 2cm2 and a force of 5N is applied what is the total pressure?
2.5N/cm2
0.4N/cm2
10N/cm2
10N/m2
If a pressure of 100N/m2 is applied to a piston with an area of 1.5m2 what is the total force?
150N
75m2
0.015N
50N
What happens to the pressure as you go deeper underwater?
It increases
It descreases
It stays the same
In the image which hole will allow the water to travel furthest?
A
B
C
When going higher in the atmosphere the pressure will
Increase
Decrease
Stay the Same
Why is it dangerous to hold your breathe when SCUBA diving?
Air in your lungs can expand as you descend, damaging them
Air in your lungs can expand as you ascend, damaging them
Water pressure can force water into your lungs
Your lungs stretch as you go deeper due to increasing pressure
Why does tea taste bad on Mt. Everest
Water boils at a lower temperature
Atmospheric pressure breaks the tea bag
Water cannot boil on Everest
It's not bad but its a lot of effort and you always forget to bring milk
Why do hydraulic mechanisms work with liquids?
Liquids apply pressure in all directions equally
Liquids can be compressed
Liquids increase pressure with depth
Liquids have a fixed shape
The diagram shows three vases each with the same base area. Each vase contains water of the same depth.
The pressure at point P is the greatest.
The pressure at point Q is the least.
The pressure at point R is the greatest.
The pressures at points P, Q and R are the same.
The diagram shows a simple mercury barometer.
The atmospheric pressure increases.
Which distance increases?
VW
WY
XY
XZ
A dam across a lake is divided into two sections by a rock. Section X is longer than section Y but the two sections are otherwise identical. The water in the lake by the dam is the same depth everywhere.
The diagram shows a view from above of the lake and the dam. The water creates a total force on each section of the dam and an average pressure on each section of the dam.
Which statement is correct?
The average pressure on X equals the average pressure on Y.
The average pressure on X is less than the average pressure on Y.
The total force on X equals the total force on Y.
The total force on X is less than the total force on Y.
The diagram shows a stone suspended under the surface of a liquid from a string. The stone experiences a pressure caused by the liquid. What would increase the pressure on the stone?
decreasing the surface area of the stone
using a liquid with a lower density
increasing the mass of the stone
lowering the stone deeper into the liquid
The diagram shows a solid block resting on a bench. The dimensions of the block are shown. On which labelled surface should the block rest to produce the smallest pressure on the bench?
P
Q
R
Any of P, Q or R
What does a barometer measure?
the current in a circuit
the density of a liquid
the pressure of air
the temperature of an object
The diagram shows three different containers J, K and L. Each container contains water of the same depth. Which statement about the pressure of the water on the base of each container is correct?
The water pressure is greatest in container J.
The water pressure is greatest in container K.
The water pressure is greatest in container L.
The water pressure is the same for all three containers.
The diagram shows a simple mercury barometer. Which length is used to find the value of atmospheric pressure?
12 cm
74 cm
86 cm
100 cm
The diagram shows two mercury barometers.
Barometer 1 is measuring atmospheric pressure on day 1.
Barometer 2 is measuring atmospheric pressure on day 2.
Which statement is true?
The atmospheric pressure on day 1 is less than the atmospheric pressure on day 2.
The atmospheric pressure on day 1 is the same as the atmospheric pressure on day 2.
The pressure at point X is less than the pressure at point Y.
The pressure at point X is the same as the pressure at point Y.