Explanation

When Thorium (Th) emits a beta particle (β⁻), a neutron converts into a proton, increasing atomic number by 1.

So Thorium (Z=90) becomes Protactinium (Z=91).

Explanation

Oscillatory systems gradually lose energy due to frictional forces (like air resistance or internal damping).

This damping reduces amplitude over time, preventing indefinite oscillation.

Explanation

Explanation

Current (Ampere) is defined as the flow of electric charge per unit time.

So, 1 Ampere = 1 Coulomb/Second, meaning 1 coulomb of charge flows each second.

Explanation

Ray tracing is the method of following individual light rays from an object to the eye (or camera) to simulate how light interacts with surfaces (e.g., reflection, refraction).

It is widely used in computer graphics, optics, and physics to model light paths accurately.

Explanation

Outer planets like Jupiter, Saturn, Uranus, and Neptune are called gas giants.

They are mostly composed of hydrogen and helium gases, with no solid surface.

Explanation

Boiling a magnet (especially in water) does not generate enough heat to affect its magnetic properties.

In contrast, hammering, heating, or dropping disturb the alignment of magnetic domains, leading to demagnetization.

Explanation

Copper has higher conductivity, strength, and corrosion resistance, leading to fewer failures and repairs.

Its durability and long lifespan reduce replacement and maintenance costs over time.

Explanation

Laser amplification involves increasing light intensity through stimulated emission inside a resonant optical cavity.

The resonance causes photons to bounce back and forth, stimulating more emissions and amplifying the light.

Explanation

Concave mirrors or lenses were used to focus sunlight onto a single point.

This focused sunlight generated high temperatures for cooking or heating.