speech of sound is 343 m/s in 20° air. you are 415m from a sound source. how long does it take the sound to reach you?

What is meant by the statement" the melting poin of glycerine is 13 degree celsius

Question 11 of 13 (1 point) jump to question: a stairway, ladder, or ramp must be present in excavations in which of the following situations? a. all trenches must have access/egress b. the trench is more than 15 feet wide but only 1 ½ feet deep c. the trench is more than 4 feet deep and the devices must be within 25 feet of all workers

Which is the most accurate name for the ionic compound cas?