Calculate the number of vacancies at 561°C given that the energy for vacancy formation is 1.04 eV/atom; assume that the density at both temperatures is the same.

An ambulance emits a frequency of 450 hz from its siren. what frequency is heard by a man as the ambulance moves toward him? less than 450 hz more than 450 hz 450 hz 0 hz

Rohit is trying to tune an instrument

Which one of the following terms is used to indicate the natural tendency of an object to remain at rest or in motion at a constant speed along a straight line? velocity acceleration equilibrium force inertia