Предмет: Физика, автор: keno28

Добрые люди, помогите найти общее сопротивление проводников

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Ответы

Автор ответа: reyzuu

Ответ:

R=10,2 Ом

Объяснение:

Ro1=r+3r+2r=6 Ом

Ro2=1/2r+4/3r+2r=4,2 Ом

Ro3=4,2r+6r=10,2 Ом

вроде так

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Specifications Asus Tinkerboard

Specs for the Tinker Board include a quad core 1.8GHz ARM Cortex-A17 CPU, 2GB LPDDR3 RAM, four USB 2.0 ports, support for gigabit LAN and Bluetooth 4.0, 3.5mm audio jack, microSD slot, Micro USB for power, swappable 802.11 b/g/n Wi-Fi antennas, and a HDMI 2.0 port with support for 4K video.

Connecting peripherals

To connect a monitor or TV using composite video or HDMI connector. Resolution ranges from 640 × 350 (EGA) to 1920 × 1200 (WUXGA) for HDMI. Composite output is in PAL and NTSC formats.
Speakers or headphones are connected via a standard 3.5 mm jack. Also, the sound can be transmitted via HDMI.
Asus Tinkerboard provides 4 USB-ports, united by an internal hub. These include, among others, can connect a keyboard and mouse. To save CPU resources, Asus Tinkerboard offers regular connection modules through the 15-pin slots:
CSI-2 - to connect on the MIPI interface chamber; DSI - to connect the regular display. As a low-level interfaces are available: 40 ports of general purpose input-output; UART (Serial); I²C / TWI; SPI with the selector between the two devices; pins Power: 3.3 V, 5 V and earth. With the help of these ports can be connected to external sensors empower the device. Such sensors may be: Analog (photo resistor, temperature sensor); Digital (accelerometer, ambient light sensor). For adverse communication on the Asus Tinkerboard available interfaces: Ethernet 10/100 Mbps with access to a standard socket 8P8C (RJ45); Wi-Fi 802.11n and Bluetooth 4.1, provided the chip Broadcom BCM43438.

4K video and 24-bit audio

The manufacturer has a media report , according to recently released the single board Tinker Board. This is nearly the same size as the Raspberry Pi, but has much more powerful hardware on the board. For example, the four-core Rockchip processor RK 3288 allows the playback of video in 4K resolution as well as the output of 24-bit audio signals via the HDMI-2 connector. This makes the small computer particularly interesting for use as a media center. With 2 gigabytes of memory, Tinkerboard has twice as much RAM on board as the competition. Obviously a Gigabit Ethernet connection, WLAN and four USB 2.0 ports are installed.

Comparatively cheap

The arrangement of the connections is identical to that of the Raspberry Pi. Anyone who now feels that they have to grip deeply into their pockets to secure this piece of technology is wrong. The Tinker-Board-Calculator (Raspberry Pi from approx. 37 Euro) costs approx. 60 Euro. A Debian Linux variant is used as the operating system. The device supports the Kodi Mediaplayer. On the software side, however, the computer may have a look at the Raspberry Pi, which has been established and supported by developers for years.

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