Tag: science & technology

Oxygen should NEVER be used in a fire extinguisher because it would intensify combustion rather than suppress it. Fire extinguishers use substances that smother flames (like CO2), cool them (like water), or interrupt chemical reactions (like certain dry chemicals). Adding oxygen is essentially adding fuel, making fires worse.

Dmitri Mendeleyev has element 101 (Mendelevium) named after him, discovered in 1955. Tesla is honored with the tesla unit for magnetic field strength, not an element. Dalton and Franklin, while important chemists/physicists, do not have elements named for them.

The moon's phases depend on its orbital position around Earth, which changes the viewing angle of its sunlit half. The amount of moonlight we see varies from new moon to full moon as the moon progresses through its 29.5-day cycle.

Dmitri Mendeleyev has element 101 (Mendelevium) named after him, discovered in 1955. Tesla is honored with the tesla unit for magnetic field strength, not an element. Dalton and Franklin, while important chemists/physicists, do not have elements named for them.

Coulomb (C) is the standard unit for electric charge, measuring the quantity of electricity transported in one second by a current of one ampere. Volt measures potential difference, joule measures energy, and ampere measures current flow rate.

Hummingbirds lay the smallest eggs of any bird species. Their eggs are roughly the size of a coffee bean or small jellybean, perfectly proportioned to the bird's tiny body size.

Sound travels faster in warmer air because increased temperature means higher molecular kinetic energy. This allows sound waves to propagate more quickly through the medium. The relationship is v ≈ 331 + (0.6 × T°C) m/s.

Alfred Nobel, a Swedish chemist and engineer, invented dynamite in 1867 as a safer alternative to nitroglycerin. His invention later led to the establishment of the Nobel Prizes, funded by his estate.

Elasticity measures how much buyers and sellers respond to changes in market conditions like price or income. Option C incorrectly focuses on price speed rather than quantity response, while A and B are unrelated to elasticity's core definition.