That y8 kid 🤣 - bot · guest · Physics

01 Increasing sound amplitude most directly increases

A frequency This does not satisfy the stated relationship.

B wavelength at fixed speed and frequency This does not satisfy the stated relationship.

C wave speed in the same medium This does not satisfy the stated relationship.

D intensity Greater amplitude carries more energy per area per time.

Written for icaijy.com · U2 · Sound · answered at 100 ms

02 During a one-minute revision round: The area under a velocity–time graph gives

A acceleration This does not satisfy the stated relationship.

B displacement Integrating velocity over time gives displacement.

C force This does not satisfy the stated relationship.

D power This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Motion · answered at 100 ms

03 Two resistors in series always carry the same

A power This does not satisfy the stated relationship.

B current There is one path for charge flow.

C resistance This does not satisfy the stated relationship.

D voltage This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Circuits · answered at 100 ms

04 A student is checking a worked solution. An ideal black body is a perfect

A absorber and emitter of radiation A black body absorbs and emits electromagnetic radiation ideally.

B mirror at every wavelength This does not satisfy the stated relationship.

C source of alpha particles This does not satisfy the stated relationship.

D thermal insulator This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Radiation · answered at 100 ms

05 Which response best completes this VCE-style item? An ideal black body is a perfect

A thermal insulator This does not satisfy the stated relationship.

B absorber and emitter of radiation A black body absorbs and emits electromagnetic radiation ideally.

C mirror at every wavelength This does not satisfy the stated relationship.

D source of alpha particles This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Radiation · answered at 100 ms

06 Which response best completes this VCE-style item? For uniform circular motion, acceleration points

A towards the centre Centripetal acceleration changes the velocity direction inward.

B away from the centre This does not satisfy the stated relationship.

C in the direction of velocity This does not satisfy the stated relationship.

D tangent to the circle This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Circular motion · answered at 100 ms

07 During a one-minute revision round: A device receives 100 J and delivers 75 J usefully. Its efficiency is

A 75% Useful output divided by input is 0.75.

B 25% This does not satisfy the stated relationship.

C 133% This does not satisfy the stated relationship.

D 100% This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Efficiency · answered at 100 ms

08 The gradient of a displacement–time graph gives

A force This does not satisfy the stated relationship.

B acceleration This does not satisfy the stated relationship.

C momentum This does not satisfy the stated relationship.

D velocity Velocity is the rate of change of displacement.

Written for icaijy.com · U2 · Motion · answered at 100 ms

09 Which response best completes this VCE-style item? The independent variable is the quantity that is

A kept constant This does not satisfy the stated relationship.

B ignored This does not satisfy the stated relationship.

C measured as the outcome This does not satisfy the stated relationship.

D deliberately changed It is manipulated to test its effect.

Written for icaijy.com · U2 · Experimental design · answered at 100 ms

10 During a one-minute revision round: During melting at constant pressure, added energy mainly

A reduces internal energy This does not satisfy the stated relationship.

B increases particle potential energy Energy changes arrangement while temperature remains constant.

C increases temperature continuously This does not satisfy the stated relationship.

D destroys energy This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Thermal physics · answered at 100 ms

11 Which response best completes this VCE-style item? After three half-lives, the undecayed fraction is

A \(1/8\) \((1/2)^3=1/8\).

B \(1/6\) This does not satisfy the stated relationship.

C \(3/8\) This does not satisfy the stated relationship.

D \(1/3\) This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Half-life · answered at 100 ms

12 After three half-lives, the undecayed fraction is

A \(1/6\) This does not satisfy the stated relationship.

B \(1/3\) This does not satisfy the stated relationship.

C \(3/8\) This does not satisfy the stated relationship.

D \(1/8\) \((1/2)^3=1/8\).

Written for icaijy.com · U1 · Half-life · answered at 100 ms

13 Which response best completes this VCE-style item? An alpha particle contains

A one electron This does not satisfy the stated relationship.

B two photons This does not satisfy the stated relationship.

C two protons and two neutrons It is a helium-4 nucleus.

D one proton and one neutron This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Nuclear physics · answered at 100 ms

14 During a one-minute revision round: An alpha particle contains

A two protons and two neutrons It is a helium-4 nucleus.

B two photons This does not satisfy the stated relationship.

C one proton and one neutron This does not satisfy the stated relationship.

D one electron This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Nuclear physics · answered at 100 ms

15 Which response best completes this VCE-style item? In an isolated collision, total

A speed of each object is conserved This does not satisfy the stated relationship.

B kinetic energy is always conserved This does not satisfy the stated relationship.

C momentum is conserved Internal impulses cancel, conserving total momentum.

D force is zero throughout This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Momentum · answered at 100 ms

16 Which response best completes this VCE-style item? Convection transfers energy mainly through

A electron flow in a vacuum This does not satisfy the stated relationship.

B electromagnetic waves only This does not satisfy the stated relationship.

C bulk motion of a fluid Warmer fluid moves and carries internal energy.

D nuclear decay This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Heat transfer · answered at 100 ms

17 Near Earth, gravitational potential energy change is

A \(mg\Delta h\) For a uniform field near Earth, ΔUg = mgΔh.

B \(m/gh\) This does not satisfy the stated relationship.

C \(mv\) This does not satisfy the stated relationship.

D \(ma\Delta h\) This does not satisfy the stated relationship.

Written for icaijy.com · U2 · Energy · answered at 100 ms

18 Which response best completes this VCE-style item? The area under a velocity–time graph gives

A force This does not satisfy the stated relationship.

B acceleration This does not satisfy the stated relationship.

C power This does not satisfy the stated relationship.

D displacement Integrating velocity over time gives displacement.

Written for icaijy.com · U2 · Motion · answered at 100 ms

19 During a one-minute revision round: Beta-minus decay converts a neutron into

A a proton, electron and antineutrino Charge and lepton number are conserved.

B an alpha particle This does not satisfy the stated relationship.

C two neutrons This does not satisfy the stated relationship.

D a photon only This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Nuclear physics · answered at 100 ms

20 Which response best completes this VCE-style item? Temperature is most directly related to the particles’ average

A electric charge This does not satisfy the stated relationship.

B translational kinetic energy Temperature tracks average random translational kinetic energy.

C gravitational potential energy This does not satisfy the stated relationship.

D rest mass This does not satisfy the stated relationship.

Written for icaijy.com · U1 · Thermal physics · answered at 100 ms