If an ice cube melts at 0°c, but water also freezes at 0°c, what is the difference between melting and freezing in terms of a. the energy involved in the phase changes b. particles of the substances during the phase changes? ⚠ not multiple choice! use complete sentences.

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

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

Lin yao looks at the back of a spoon. how should she describe her reflection? upside down and smaller upside down and larger right-side up and smaller right-side up and larger