PLS HELP ASAP!! How many calories are required to melt a 10g ice cube which is at 0° C? A. 10 cal
B. 800 cal
C. 80 cal
D. 540 cal

800 calories are required to melt a 10g ice cube which is at 0 degrees C.

Explanation:

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it's when something is going so fast it makes a loud noise, breaking the sound barrier, for example: a jet makes a loud noise, not only cause of the jet but because they reached a point where they went so fast that you can year the noise from various parts, kinda like a police car, lets say the car was going   so fast that you hear the siren of the cop car right next to you, but the car is probably a mile a way, it's cos the siren was next to you a few seconds if you understand me