Pressure In Gases Flashcards
(15 cards)
Calculate the moment if a force of 20N is applied at a distance of 0.5m from a pivot.
Moment = Force x Distance = 20N x 0.5m = 10Nm
Explain the importance of the centre of mass in balancing an object.
The centre of mass is crucial for stability; it must be above the pivot for balance.
What happens if the centre of mass is not above the pivot?
The object will topple or fall.
What is gas pressure and how is it caused?
Gas pressure is caused by particles colliding with surfaces.
What is the formula for pressure in gases?
Pressure = Force / Area (Measured in Pascals, Pa)
How does increasing temperature affect gas pressure?
Higher temperature increases particle movement and pressure.
Why do balloons expand when taken to a higher altitude?
Balloons expand due to lower atmospheric pressure at high altitudes.
Calculate the pressure if a force of 50N is applied over an area of 0.1m².
Pressure = Force / Area = 50N / 0.1m² = 500Pa
Explain the collapsing can experiment using gas pressure principles.
The experiment demonstrates pressure differences when the can is heated and then cooled rapidly.
What is the formula for pressure in liquids?
Pressure = Density x Gravity x Depth
What causes pressure in liquids to increase?
Pressure in liquids increases with depth due to the weight of water above.
What is upthrust?
Upthrust is the force exerted by a liquid to push an object upwards.
When do objects float in a liquid?
Objects float if they displace a weight of liquid equal to their own weight.
What is a real-life application of pressure in liquids?
Dams have thicker walls at the bottom to withstand higher pressure.
How are submarines designed in relation to pressure?
Submarines are designed to withstand high pressures.
