Questions Flashcards
Give the definition - the attraction (pulling together)
Electrostatic attraction
An engineer. 20,000N , 50,000PA , area m2
0.4
Units for force
N
Units for area
M2
Units for pressure
Pascal
Mass
Kg, pounds and grams
Units for volume
Cubic
An engineer, 20,000 N , 50,000PA , area m2
0.4m2
To push away
Repel
Jackie, different materials, sink or float
Shape of material
Foggy field, size 3, size 8, outcome?
Person with size 8 shoes would sink less
A gas exerts a pressure on a wall of its container because particles
Collide with
Upwards force exerted on an object in water measured in N
Upthrust
Weight of 50N , upthrust is 60N, will it float?
Yes
800N , 4m2 , calculate pressure
200
Less likely to hold static charge
Copper wire
Furniture designer, 4legs 4m2, 3legs 6cm2
Second one - total surface area is greater
Mass of a material per unit volume
Density
Mass of 60kg , Jupiter , 27N/Kg
1620kg
Magnets / objects to repel each other
South to south and north to north
2 pieces of information to calculate pressure , solid object
Area of object and weight of object
N/m2 , 240N , 12m2
20
The force of gravity acts on things that have
Mass
Earth’s gravitational field is false?
The earth’s gravitational field has no effect once you leave
Ethanol, 3 are correct
Some objects which float
When an object
When an object
Where are you going to find an electrostatic field
Around a charged object
Heavy person, lake
Upthrust is about same weight
The force of gravity acting over an object
Weight
Skateboarder, 900N , 0.001m2
225,000
20g/cm3 , 1g/cm3 , density
No
Aircrafts, pressurised, what’s the main reason
At high altitudes, low atmospheric pressure, less oxygen
Jackie, independent variable
Type of material
30N, will it float
Not enough information
2 statements about magnetism is true
Alloys of cobalt and 2 magnets can attract/repel depending on orientation
Pressure in liquid
Acts in all directions
