When water flows in to the cracks of a rock freezes and breaks into smaller pieces is it a chemical or physical change?

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

How does a circuit breaker protect a refrigerator? a. when the current is too high, a metal strip in the fuse melts and opens the circuit. b. when the resistance is too high , a re-settable which opens a circuit c. when the current is too high , a re-settable switch opens the circuit d. when the resistance is too high a metal strip in the fuse melts and opens the circuit

Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these