Phys Content
What is Newton’s Third law of motion?
For every action, there is an equal and opposite reaction!
What did we make during the electromagnetism experiment?
What are polymers made of?
Monomers
What additives did we include in the slime? (4)
Clay, food colouring, glitter, scent
How are electric currents generated?
The constant movement of electrons/charged ions
What direction do magnetic field lines point towards?
North → South
Changing the shape of the paper airplanes can ___ drag and ___ lift in order to improve the airplane’s flight time!
Decrease, increase
What are the types of catalysts? (3)
Heterogeneous, homogeneous, enzymatic
What is the role of an activator in making slime?
It cross-links the polymers in the glue
Outline how an energy profile’s curve would change with a catalyst.
It would be lower, requiring less energy
A cube of side length 2m and mass 3kg is sitting on a table. What is the pressure applied by the cube onto the table? Let g = 10N
(hint: weight = mass*gravity)
(3*10)/(2*2) = 7.5Pa
What parts were used to assemble a homopolar motor? (3)
Copper wire, Battery, Neodymium Magnets
How do catalysts speed up reactions?
By providing an alternative pathway with a lower activation energy
What chemical substance does elephant toothpaste use?
A catalyst
Describe the difference between the general definition of pressure and fluid pressure.
Fluid pressure refers to the force applied by fluid molecules to their container--
While general pressure refers to the force applied by any body over the area of contact
A plane has a wing which has an airfoil shape. The differences between the speed of the air above and below the wing create a pressure difference inducing a lift. What are the relative speeds and pressures above and below the wing? (4)
Above: High speed, low pressure
Below: Low speed, High pressure
State the parts of the left hand rule. (3)
Force, Magnetic field, Current
Through which processes can polymers be formed? (2)
Addition, Condensation
What smell do long-chain esters have?
A floral scent
State the key terms in a catalysis mechanism. (5)
Reactant/Substrate, active site, catalyst, complex, product
On an atomic level, what causes magnetism?
The spin of electrons aligning with each other
Use the left hand rule to determine the direction of the force in this diagram.
flowing out of the page
What functional group are esters made from? (2)
Alcohols, carboxylic acids
What does hydrogen peroxide (H2O2) break down into? (2)
Water (H2O), oxygen (O2)
What does it mean when a material is ferromagnetic OR state 4 ferromagnetic materials.
Ferromagnetic: Materials which can be permanent magnets, they are also affected by magnetic fields