Calculate the distance of the end of a valley bearing in mind that the echo takes 0.7 seconds to be heard from the moment when the sound was produced. a

An unknown substance has a melting point of 1064 ∘c, is insoluble in water, conducts electricity as a solid, and is hard. given these properties, which of the following are possible identities for the unknown substance? check all that apply. view available hint(s) check all that apply. sio2 f2 au kbr

Which quantities are scalars? choose all that apply a.distance b.speed c. acceleration d.velocity

Velocity is a description of both speed and direction, therefore it - a vector - a force arrow - the same as acceleration - a magnitude