TOPIC A
The rate of change of displacement, found by the gradient of a displacement-time graph.
Velocity
The energy required to raise the temperature of 1 kg of a substance by 1 K.
specific heat capacity
The distance between two consecutive points in phase on a wave.
Wavelength
Newton’s Law stating force is inversely proportional to the square of separation.
Universal Law of Gravitation
The term for nuclei that have the same number of protons but different numbers of neutrons.
isotopes
A turntable accelerates from rest to angular velocity ω in time t. Calculate the radians rotated in terms of ω and t.
θ=21ωt
An ideal gas at 20°C has its volume halved and pressure tripled. Calculate the new temperature.
439.5 K or 166.5°C
Two coherent sources have intensity I. Calculate the intensity at a point of constructive interference.
4I
Calculate the work done to move a 2 C charge between two points on the same 500 V equipotential surface.
0 J
Calculate the binding energy per nucleon (in MeV) for a nucleus with BE=120 MeV and A=20.
6 MeV
Calculate the Lorentz factor (γ) for a particle traveling at 0.8c relative to the lab frame.
γ=1.67
Calculate the work done by an ideal gas that expands isobarically at 100 kPa from 2 m3 to 5 m3.
300 kJ
Calculate the frequency of the 1st harmonic in a pipe (length 0.5 m) open at both ends (v=340 m s−1).
340 Hz
Explain why a satellites orbital speed increase if it moves closer to the Earth.
total energy is constant and the PE decreases as it gets closer
Calculate the energy in eV of a photon with a wavelength of 400 nm.
3.1 eV
A solid sphere (I=52mr2) rolls without slipping. Calculate the ratio of its rotational KE to its total KE.
2/7
An object has an albedo of 0.3. If 1000 W is incident on it, calculate the power absorbed.
700 W
Calculate the angular separation of the 1st order max for 600 nm light on a grating with 500 lines/mm.
17.5°
Calculate the acceleration of an electron placed between two parallel plates 0.05 m apart with a potential difference of 200 V.
7 x 1014 m s-2
A star's peak wavelength is half that of the Sun. Calculate the ratio of this star’s power per unit area to the Sun’s.
16:1
Calculate the proper time interval (Δt0) if an observer moving at 0.9c measures a process to take 10 seconds.
≈4.37 s
Calculate the change in entropy when 2.0 kg of ice melts at 273 K (Lf=3.3×105 J kg−1).
≈2417 J K-1
An object in SHM has A=0.2 m and T=2 s. Calculate its maximum acceleration.
≈1.97 m s−2
Calculate escape velocity for a planet with mass 2ME and 0.5RE (Earth vesc≈11 km/s).
22 km s-1
Photons with energy 10 eV hit a metal surface with a work function of Φ=2 eV. Calculate the De Broglie wavelength of the ejected electron.
≈0.43 nm