A cup of hot coffee initially at 95 degree celsius cools to 82 degree celsius in 5 minutes while sitting in a room of temperature 21 degree celsius. Using newton’s law of cooling, determine when the temperature of coffee will be a nice 50 degree celsius.

Luminous objects such as flashlights emit light that we can see. how do we see an object that isn’t luminous? a. the object emits light that reaches our eyes. b. light reflects off the object and reaches our eyes. c. light passes through the object uninterrupted. d. light is fully absorbed by the object. e. we can’t see an object that isn’t luminous.