Why does a wet hand feel cool when air passes over it?
A) Evaporation removes heat from the skin B) Air creates ice crystals inside every cell C) Wind stops all heat […]
Every Day Science, Scientific Reasons
Scientific Reasons
Every Day Science, Scientific Reasons
Why does a wet hand often feel cool in moving air?
A) Wood conducts heat less readily than metal B) Metal wires expand as temperature rises C) Evaporation removes heat from […]
Every Day Science, Scientific Reasons
Why does a wet surface often feel cooler as it dries?
A) Water generates ice instantly B) Drying creates gravity C) Oxygen disappears D) Evaporation carries energy away Answer: D Explanation: […]
Every Day Science, Scientific Reasons
Why does air pressure generally fall on a high mountain?
A) The Moon's gravity and Earth's rotation create tidal bulges B) There is less overlying air at higher elevation C) […]
Every Day Science, Scientific Reasons
Why does an electromagnet stop attracting strongly when switched off?
A) Both feet are at nearly the same electric potential B) Greater tension raises its vibration frequency C) Its magnetic […]
Every Day Science, Scientific Reasons
Why does an iron gate rust faster when wet?
A) Water and oxygen support iron oxidation B) Processing reduces microbes and the seal limits new contamination C) Gas bubbles […]
Every Day Science, Scientific Reasons
Why does an iron nail cling to a magnet but a wooden pencil does not?
A) Greater length and smaller area hinder charge flow B) Sound requires a material medium to travel C) Solid material […]
Every Day Science, Scientific Reasons
Why does baking soda make bubbles when added to vinegar?
A) Different gear ratios trade pedaling rate for turning force B) The ship displaces enough water with its hollow shape […]
Every Day Science, Scientific Reasons
Why does boiling water not grow hotter during boiling at constant pressure?
A) Metal conducts heat away from skin faster B) Condensation releases latent heat to the skin C) Added heat goes […]
Every Day Science, Scientific Reasons
Why does clapping in an empty hall create a lingering sound?
A) Its magnetic field depends on electric current B) Both feet are at nearly the same electric potential C) Greater […]