Laws and Definitions
What does WHIMIS stand for?
Workplace Hazardous Materials Information
How does temperature impact the density of solids liquids and gases?
Warmer -> less dense Cooler -> more dense
Will an object float best if the mass is condensed or spread out?
Spread out
Are liquid or gasses more compressible?
Gasses
How does the particle theory of matter relate to mass, volume, and density of solids liquids and gases?
The closer the particles are together the denser the substances is. That is more dense will take up less volume then an object of equal mass that is less dense.
What do you need the mass and volume of an object in order to calculate? What is the equation?
Density d= m/v
What unit is appropriate to measure density in?
g/mL or g/cm3
Which hull design supported the most mass? Large and flat, or V-shaped and narrow?
Large and flat
Does the pressure increase or decrease when you place your thumb over the end of the garden hose?
Increase
Why were canoes used by First Nations and Metis peoples?
Canoes were used for transporting people and goods long distances. They were used to aid in trading.
What is the water displacement method, and what is it used for?
The water displacement method is used to measure the volume of an irregular object’s volume, by placing the object into the liquid and measuring the volume of displaced liquid.
Which substance has a higher viscosity? Water or honey
Honey
List the liquids in order for highest buoyant force to least buoyant force. Cool water, Warm Water, Salt water.
Salt water, cool water, warm water
When more force is applied to a system it increases/decreases the pressure in the system?
Increases
How do hot air balloons work?
The air is warmed and contained in the balloon. The warm air is less dense than the surrounding cool air allowing it to rise.
What is the Archemesies principal?
The Archemedes principle is the buoyant force acting on an object equals the weight or gravitational force of the fluid displaced by the object.
When you increase a substances temperature does it increase or decrease a substances viscosity?
Decrease
What two forces directly influence the buoyancy of an object?
Buoyant force and force of gravity
What is a natural pneumatic system?
Lungs
Why did the Inuit and Aleut people develop the first kayak?
Kayaks means “hunter boat” and was used to hunt waterfowl, seals, walrus, and whales. The kayak is lightweight and strong enough to survive heavy seas.
What is Pascals Law?
P=F/A
What is viscosity?
A liquids internal resistance or friction that keeps it from flowing.
How do submarines work?
The chambers in the submarine can let water in to increase the sub’s mass to help it sink. Compressed air will be released into the chamber to push out the water decreasing the mass allowing the submarine to float.
What is a natural hydraulic system?
Heart
Which oil is more viscos? 10w30 vs 5w30.
10w30