Explanation

72 marks = 80% of total marks  

Let total marks = x  

So, 0.8x = 72 ⇒ x = 72 ÷ 0.8 = 90

Explanation

Orbital velocity is 1/√2 times escape velocity, derived from gravitational motion equations.

Explanation

The property that does not depend on the nature of the solute molecule is the Colligative property. 

Colligative properties depend solely on the number of solute particles present in a solution, not their identity or chemical nature. 

Explanation

To find the unit vector of A = 8i + 2j + 2k, follow these steps:

1. Find the magnitude of vector A:

   √(8² + 2² + 2²) = √(64 + 4 + 4) = √72

2. Divide each component by the magnitude:

   Unit vector â = (1/√72) × (8i + 2j + 2k)

Explanation

pH is directly proportional to the oxygen-carrying capacity

Meaning that as pH increases, the ability of blood to carry oxygen also increases. 

Explanation

Glucose molecules contain multiple hydroxyl groups (-OH) which can form hydrogen bonds with water molecules, allowing them to readily dissolve in water. 

Explanation

P and V graph at constant temperature, 

PV=nRT⟹ ideal gas equation.

PV=C 2 

xy=C 2  from hyperbola.

Explanation

Explanation

The dimensions of impulse are the same as momentum. 

Explanation

Thick filaments in skeletal muscles are composed of myosin.

Myosin interacts with actin in thin filaments to facilitate muscle contraction through cross-bridge cycling.