A bat, makes a single clicking noise when it enter a cave and hears the echo 0.12 s later. , how close was she to the wall when she received the echo? (assume the
speed of sound is 343 m/s)

Which boundary is associated with the building of the himalaya mountains? convergent transform divergent hot spot

Positrons are spontaneously emitted from the nuclei of

Nacidified solution was electrolyzed using copper electrodes. a constant current of 1.18 a caused the anode to lose 0.584 g after 1.52 ✕ 103 s. given that the charge of an electron is 1.6022 ✕ 10−19 c, calculate avogadro's number. assume that copper is oxidized to cu2+ ions.