Which happens when sound waves enter a vacuum? A. They are reflected.

B. They move slower

C. They move faster

D. They stop moving

Juan created a chart to him study for a test. which headings best complete the chart? x: transparent objects y: opaque objects x: opaque objects y: transparent objects x: high frequency waves y: low frequency waves x: low frequency waves y: high frequency waves

Hen a gfci receptacle device is installed on a 20-ampere branch circuit (12 awg copper), what is the minimum volume allowance (in cubic inches) required for conductor fill for each conductor in the outlet box?

What is the average speed of a car that travels 40mph for 1 hour and 60 mph in another hour will mark brainliest