Explanation

Explanation

Explanation

In projectile motion, the vertical and horizontal components are treated separately.

The horizontal motion is uniform (constant velocity), while the vertical motion is subject to gravitational acceleration.

Explanation

When a car crashes into a tree, momentum is generally conserved in an isolated system (assuming no external forces).

Still, kinetic energy is not fully conserved due to energy being converted into other forms like sound, heat, and deformation of the car.

Explanation

Inertia is the natural tendency of an object to remain at rest or in motion with constant velocity.

Explanation

Radiation was discovered by Henri Becquerel in 1896.

When he observed that uranium salts emitted rays that could fog photographic plates.

It leading to the study of radioactivity.

Explanation

A convex lens can focus sunlight at one point by converging the light rays.

That is why it is often used in magnifying glasses or for starting fires using sunlight.

Explanation

Richer Scale is used for measuring Strength of an earthquake.

The intensity of earthquake is measured by Richter Scale.

Richter Scale was invented in 1935.

Explanation

The path of a charged particle in a plane perpendicular to a uniform magnetic field is Circular. 

When a charged particle enters a magnetic field perpendicularly,

The magnetic force acts perpendicular to its velocity,

This causes it to continuously change direction, resulting in a circular path. 

Explanation

• Energy is measured in Joules (not Newtons).
• Force is measured in Newtons (not Joules).
• Velocity is measured in meters per second (m/s), not meters per second squared (m/s²), which is a unit of acceleration.