Alevel Paper 1

Which row identifies the exchange particle Q and the quark structure of particle R?

• Q: W^- and R: uuu

• Q: W⁺ and R: dud

• Q: W⁺ and R: uuu

• Q: W^- and R: dud

What of the following is a hadron of zero charge?

• neutrino

• photon

• proton

• neutron

Which answer does not give the correct force and exchange-particle combination?

• gravitational attraction: W boson

• electrostatic repulsion of electrons: virtual photon

• strong interaction: pion

• β⁻ decay: W boson

The ∑⁰ baryon, composed of the quark combination uds, is produced through the strong interaction between a π⁺ meson and a neutron.

π⁺ + n → ∑⁰ + X

What is the quark composition of X?

• u s̅

• u d

• u d̅

• u d s̅

A sonar transmitter on a ship produces pulses of sound waves. Each pulse of sound waves contains 12 complete oscillations. The frequency of these waves is 8.0 kHz and the speed of sound in seawater is 1.5 × 103 m s^–1.

What is the length of one pulse in seawater?

• 0.188 m

• 2.25 m

• 2.25 × 10³ m

• 1.44 × 10⁵ m

Which characteristics of monochromatic light change when the light passes from air into glass?

• Speed, wavelength and frequency.

• Speed and frequency only.

• Speed and wavelength only.

• Wavelength and frequency only.

Hooke's Law describes the behaviour of which kind of material under tension?

• plastic
• metals only
• elastic
• non-metals only

In which side of the graph does the spring obey Hooke's law?

• To the left of point A

• To the right of point A

Which statement most accurately represents Hooke's Law?

• a) The stretch of a spring is directly proportional to the force applied.

• b) The stretch of a spring is proportional to the number of coils.

• c) The stretch of a spring is inversely proportional to the force applied.

• d) Thickness of a spring wire is proportional to the force applied.

What is the formula for Kinetic Energy?

• KE = mass x velocity

• KE= 1/2 x mass x velocity ²

• KE = mass x gravity x height

• KE = mass x velocity / 2