EduNinjaThis question is about satellite communications and time-division multiplexing.
Many digital signals are transmitted from a satellite to a ground station. The signals appear to be sent along a single transmission channel at the same time.
Outline how the signals are sent along the transmission channel.
This question is about simple harmonic motion (SHM) and sound.
The diagram shows a section of continuous track of a long-playing (LP) record. The stylus (needle) is placed in the track of the record.
As the LP record rotates, the stylus moves because of changes in the width and position of the track. These movements are converted into sound waves by an electrical system and a loudspeaker.
A recording of a single-frequency musical note is played. The graph shows the variation in horizontal acceleration of the stylus with horizontal displacement.
The Digital Versatile Disc (DVD) stores both audio and video in a digital form. The video images are collected via a charge-coupled device (CCD) in which incident light causes charge to be stored on an array of pixels. Describe how a stored digital signal of the image can be obtained from the pixels.
This question is in two parts. Part 1 is about solar power and climate models. Part 2 is about digital storage of data.
A charge-coupled device (CCD) enables large amounts of photographic data to be captured and stored.
Outline how the image on a CCD is digitized.