Explanation

Explanation

Speed is defined as the rate of change of position over time.

It indicating how quickly an object moves from one place to another.

It is a scalar quantity, meaning it only has magnitude and no direction.

Explanation

The appropriate Doppler equation when the source is approaching the stationary observer is 𝑓𝑜 = 𝑣/𝑣 − 𝑣𝑠 𝑓𝑠.

This equation accounts for the increased frequency observed when the source moves toward the observer, as the sound waves are compressed.

Explanation

The Lyman series falls in the ultraviolet region.

It corresponds to electronic transitions in a hydrogen atom where the electron drops to the n=1 energy level, emitting ultraviolet radiation.

Explanation

The condenser is a heat exchanger used to transfer heat from the refrigerator.

It releases the absorbed heat from the refrigerant to the surrounding environment.

Explanation

If the mass is doubled, both angular and linear momentum will be doubled according to the conservation of momentum principle.

Explanation

If a positive charge is placed between two negative charges, the system will be unstable due to the repulsive forces between like charges.

Explanation

Explanation

Explanation

Projectile motion is a type of two-dimensional motion where an object moves under the influence of gravity, with a constant acceleration of g (9.8 m/s²).

It involves a combination of horizontal motion with a constant velocity and vertical motion with a constant acceleration, resulting in a curved trajectory.