Physics Paper 2 November 2003

1. AThe velocity at which an object's acceleration is momentarily greatest
2. BThe constant velocity reached when the driving and opposing forces balance
3. CThe velocity at the exact instant an object is first released from rest
4. DThe maximum speed reached before any resultant force starts acting on it

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1. AThe product of the force and the perpendicular distance to its line of action
2. BThe force multiplied by the total distance the object travels while it acts
3. CThe rate at which a force changes an object's momentum about that point
4. DThe energy transferred by a force as it turns an object through one full turn

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1. A650 nm
2. B900 nm
3. C200 nm
4. D450 nm

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1. AThe absolute temperature
2. BThe number of moles present
3. CThe molar gas constant
4. DThe total internal energy

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1. AVaporisation needs far more energy to fully separate molecules into a gas than fusion needs to loosen a solid into a liquid
2. BLiquid water molecules are inherently heavier than solid ice molecules, so vaporising them into steam needs extra energy
3. CFusion occurs at a higher temperature than vaporisation, so fusion actually needs the larger energy input to break the solid's bonds
4. DVaporisation is simply a much faster process than fusion, and any faster physical change generally needs more energy overall

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1. AFeedback is taken from the output stage's ground pin
2. BOutput is connected directly to the inverting input
3. COutput is connected directly to the non-inverting input
4. DInput signal is applied to both inputs at once

1. ABuffers the signal, giving high input impedance
2. BAmplifies the input signal by a large fixed gain
3. CFilters out high-frequency noise from the input
4. DInverts the phase of the input signal by 180 degrees

1. ALaminar and turbulent flow differ only in flow direction, not in streamline pattern
2. BIn laminar flow, streamlines cross and mix chaotically; in turbulent flow, they stay parallel
3. CLaminar flow only occurs in gases, while turbulent flow only occurs in liquids
4. DIn laminar flow, streamlines do not cross; in turbulent flow, they cross, forming eddies

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1. AMomentum conservation only applies to this particular decay if a gamma ray happens to be emitted as well, carrying away its own share of the momentum
2. BMomentum is not conserved here at all, because the energy released from the nucleus converts directly into extra momentum for both product particles
3. CSince the parent nucleus was stationary, total momentum before is zero, so the two products recoil in opposite directions with equal and opposite momenta
4. DThe alpha particle alone carries away the momentum of the decay, since the much heavier polonium nucleus is assumed to stay completely at rest throughout

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