MDCAT 2026 MCQs

The change in internal energy equals heat added minus work done by the system.
It is an energy-balance statement.

Convert 5 minutes to 300 seconds and use E=Pt.
E=100×300 = 30,000 J.

Real processes have a preferred direction and generate entropy.
Some heat must be rejected by a cyclic heat engine.

In SHM, the restoring influence grows with displacement.
The acceleration always points toward the equilibrium position.

Kelvin temperature is Celsius temperature plus about 273.
27+273 = 300 K.

Amplitude measures the largest excursion from equilibrium.
It affects energy but not the ideal SHM period.

Celsius temperature is kelvin temperature minus about 273.
310-273 = 37°C.

One-syllable adjectives generally form the comparative with -er.
The word 'than' signals a comparison between two routes.

Use Q=mcΔT.
Q=2×4200×5 = 42,000 J.

Long adjectives usually form the superlative with 'most.'
The definite article 'the' also signals the highest degree.

Use ΔT=Q/(mc).
6000/(0.5×400)=30°C.

Use Q=mL.
Q=3×334,000 = 1,002,000 J.