Rubbing both palms together quickly makes them warm because friction:
Aremoves cold from the air
Bproduces heat energy
Cstores heat from outside
Dreflects body heat
Answer & Solution
Correct answer: B. produces heat energy
Rubbing converts the energy of motion into heat at the surfaces.
Keep practising Heat
Browse all Heat questions for Olympiad (Class 7), or explore more Science topics.
Related questions
Some solar water heaters move hot water upward without a pump by:Thick mud walls keep a hut cooler in summer mainly because mud is a:An ice cube melts in your hand because heat flows:While measuring the temperature of hot water, the laboratory thermometer should be held:When a 90 degrees C block touches a 10 degrees C block, the hotter block's temperature wilHeat is a form of:Normal body temperature on the Fahrenheit scale is nearly:The bottoms of cooking vessels are often blackened with soot because black surfaces: