Explanation

The efficiency of a Carnot engine is defined as the ratio of the heat absorbed from the hot reservoir (heat accepted) to the heat rejected to the cold reservoir (heat rejected).

This efficiency is directly related to the temperature difference between the two reservoirs. 

Explanation

 Knocking causes incomplete combustion and inefficient engine performance, which reduces the efficiency of an engine.

Explanation

Such a patient should be transferred to a medical facility with great care and minimum movement of the patient, as it is crucial to avoid further injury by minimizing movement during transportation.

Explanation

Reversible inhibitors, including both competitive and non-competitive inhibitors, form weak linkages with enzymes. 

Explanation

Torque is a vector quantity.

The direction of the torque vector depends on the direction of the force on the axis

Explanation

 When capacitors are connected in parallel, their capacitances add up directly:

C_eq = C₁ + C₂ + C₃ = 2 + 2 + 2 = 6 µF

Explanation

White blood cells, also called leukocytes are the cells of the immune system that are involved in protecting the body against both infectious disease and foreign invaders.

The lifespan of white blood cells ranges from 13 to 20 days

Explanation

Exophthalmia and Graves' disease are related to thyroid gland dysfunction.

Graves' disease is an autoimmune disorder

That causes hyperthyroidism, and exophthalmia (bulging eyes) is a common symptom of this condition

Explanation

The mandible, or jaw bone, is the only movable bone of the skull

They are forming the temporomandibular joint with the temporal bone.

Explanation

Kinetic energy (KE) is given by the formula:  

KE = ½ mv²

If speed is doubled (v → 2v), then:  

KE' = ½ m (2v)² = ½ m × 4v² = 4 × KE

So, kinetic energy increases by a factor of 4.