Explanation

• Rutherford’s gold foil experiment (1911) showed that an atom has a small, dense, positively charged center called the nucleus.
• The mass of the atom is concentrated in the nucleus, while most of the atom is empty space.

Additional information:

• Nucleus contains: Protons (+) and neutrons (neutral)
• Electrons move around the nucleus in mostly empty space
• The experiment involved alpha particles being deflected by the nucleus.

Last verified on 10-02-2026

Explanation

Kelvin = °C + 273

27 + 273 = 300 K.

Last verified on 06-07-2026

Explanation

• Electromagnetic induction was discovered by Michael Faraday in 1831.
• It is the production of an electric current by a changing magnetic field.
• This discovery led to the development of electric generators and transformers.

Last verified on 22-07-2026

Explanation

• A Leap Year is an astronomical year with an extra day.

Additional information:

• Leap Year: 366 days (February has 29 days).
• Common Year: 365 days (February has 28 days).
• Solar Year: Approximately 365.2422 days (Earth's revolution around the Sun).
• Lunar Year: About 354 days (12 lunar months).
• Recent Leap Years: 2016, 2020, 2024, 2028, 2032.

Last verified on 21-07-2026

Explanation

• Ocean waves generate Hydrokinetic Energy.
• Hydrokinetic energy is produced from the movement of ocean waves, tides, and flowing water without the need for a dam.
• It is a clean, renewable, and environmentally friendly source of energy.

Last verified on 21-07-2026