Explain why you can hear the sound of an ambulance from far away.

Explain why the sound changes when the ambulance is further away, then closer and then further away from you again.

Why is it important always to use horizontal bars in unit fractions when performing unit conversions?

Carbon 14 is a naturally occurring stable

A0.750 kg aluminum pan is removed from the stove and plunged into a sink filled with 10.0 kg of water at 293 k. the water temperature quickly rises to 297 k. what was the initial temperature of the aluminum pan? the specific heat of aluminum is ca = 900 j/(kgk) and water is cw = 4190 j/(kgk)