khi đặt hai đầu dây dẫn một hiệu điện thế 12V THÌ CƯỜNG ĐỘ DÒNG ĐIỆN qua dây dẫn là 0,4A Nếu đặt một hiệu điện thế là 18V vào hai đầu dây dẫn thì cường độ dòng điện là bao nhiêu

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

Sally turns on her cellular telephone to speak to her friend who is located thousands of miles away. which of the following best describes how such a telephone is able to transmit and receive information? a. the cellular telephone transmits, receives, and encodes information using only sound waves. b. the cellular telephone transmits, receives, and encodes information using only electromagnetic waves. c. the cellular telephone transmits information by electromagnetic waves to a receiver which then encodes them and produces sound. d. the cellular telephone transmits information by sound waves to a receiver which then encodes them and produces electromagnetic waves.

Elements on the periodic table are ordered according to their