Explanation

Weight depends on the gravitational force, which decreases with altitude.

As the person moves away from the Earth's surface, gravity slightly weakens, so their weight becomes less than 600 N.

Explanation

The electrostatic force between two charges is given by Coulomb’s Law:

F = k * q₁ * q₂ / R²

If a total charge Q is divided into two parts: q and Q−q, the force becomes:

F = k * q * (Q − q) / R²

To maximize F, differentiate F with respect to q and set dF/dq = 0:

dF/dq = k/R² * [Q − 2q] = 0  

⇒ Q − 2q = 0  

⇒ q = Q/2

Explanation

The speed of sound in an ideal gas is proportional to √(P/ρ).  

But at constant temperature, P/ρ remains constant for gases (since both pressure and density scale equally).  

So, the velocity of sound is independent of pressure if temperature is constant.

Hence, ratio = 1:1.

Explanation

The Zeroth Law states that if two systems are each in thermal equilibrium with a third system

They are in thermal equilibrium with each other.

This defines the concept of temperature.

Explanation

Explanation

Alpha (α) radiation consists of heavy, positively charged particles (alpha particles) that are emitted from the nucleus of an atom during certain types of radioactive decay.

Alpha particles are highly ionizing, meaning they can efficiently remove tightly bound electrons from atoms, resulting in the formation of ions.

Explanation

The Boolean expression for an OR gate is A + B, where A and B are the inputs.

This expression reads "A or B".

In Boolean algebra, the OR operation is represented by a plus sign (+) or a logical disjunction symbol (∨).

So, the expression A + B or A ∨ B represents the OR operation.

Explanation

Condensing is the process by which a gas changes state to become a liquid.

This occurs when the temperature and pressure of the gas are reduced to the point where the molecules slow down and come together to form a liquid.

Key Points:

• Melting is the process where a solid becomes a liquid.
• Freezing is the process where a liquid becomes a solid.
• Boiling is the process where a liquid becomes a gas.

Explanation

Vector quantities are physical quantities that have both magnitude (amount or size) and direction.

Examples of vector quantities include:

• Displacement
• Velocity
• Acceleration
• Force
• Momentum

Explanation

• Conductors are materials that allow electricity to flow through them, such as copper, aluminum, and gold.
• They have a high concentration of free electrons, which are able to move freely within the material, carrying electrical charge with them.
• Materials that do not allow electricity to pass through them are called insulators.