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3. Dinitrogen tetroxide (N2O4) breaks down into nitrogen dioxide (NO2). If the reaction is reversible and endothermic, which condition will give the largest yield of NO2? a. High temperature and […]

2. Which statement is true for the following chemical reactions? CuCO3 + heat à CuO + CO2 CuO + SnO à Cu + SnO2 a. CO2 is oxidized and SnO2 […]

1. Element Y has a nucleon number of 19 and a proton number of 9. Which group in the Periodic Table does it belong to? a. Group I b. Group […]

15. If |0 and |1 represent an orthonormal basis for the states of a single qubit, which of the following represents an entangled state of two qubits A and B? […]

14. Which one of the following quantities is invariant under Lorentz transformation? a. Charge density b. Charge c. Current d. Electric field Introduction to Lorentz Invariant Quantities In special relativity, […]

13. A particle of mass m undergoes harmonic oscillations with period T, about x = 0. Now a force F is applied to the particle, acting opposite in direction to […]

12. Note the spring-and-mass arrangement below. With no mass the spring has a rest length x0. Now a mass m is introduced as shown. Which curve in the gray box […]

11. Consider the following “logistic” equation that describes the growth of a population of organisms: 𝑑𝑥/𝑑𝑡 = 𝑥(1 − 𝑥). The stabilities of the fixed (equilibrium) points are: a. 𝑥 […]

10. In a certain process 1.5×105 Joules of heat is added to an ideal gas to keep the pressure at 2.0×105 Pa while the volume expands from 6.3m3 to 7.1m3. […]

9. Standing waves are excited in a 1 m long pipe open at one end, closed at the other. Take the speed of the wave as 340 m/s and calculate […]