In your own words, explain why cell phones are now called smart phones.

Write in the missing information and answer the questions.

a) Cell phones communicate with the help of the _______________________________________.

b) The work of a cell phone _i­­s similar to the work of a _____________________________.

c) Who invented the first telephone? ______________________________. When? ________________.

d) Earlier versions of the phone were communicating between each other via __________________,
whereas modern cell phones connect ______________________.

Choose the correct answer.

Cell phone stands for:
a) cellulose phone b) cell type battery phone c) cellular phone d) biological cell

The signals of the cell phones are passed over by:
a) photons b) electrons c) air humidity d) radio waves d) plasma

Radio waves travel at a speed that of:

a) Speed of sound b) speed of light c) 1st escape velocity d) 2nd escape velocity

Label the pictures.

SIM = _____________________

_________________________ __________________________

In your own words, explain why cell phones are now called smart phones.

_____________________________________________________________________________________________

_____________________________________________________________________________________________

____________________________________________________________________________________________.

Smart Phone Lab

Before lab: Download AndroSensor

Every smartphone phone has a 3-axis accelerometer built into it. This allows the device to know if you rotate the device, play various games, and to sense acceleration due to changes in speed and/or direction. This lab will allow us to get “smart” about circular motion using your phone and whichever apps you can download that will work well.

Get to know acceleration in 3 directions:

1. Place phone on a level table, and record the acceleration along each x, y, and z axis:

ax=, ay=, az=

3. You should have measured zero for all 3 accelerations so if not remember to subtract your readings the offsets.

Which axis tells you the vertical direction? (try shaking vertically and see which changes)

4. Spin your phone on the table and see if your z- acceleration stays constant or try to graph it. If you see large changes or curvy graphs, does that mean you are spinning in a horizontal flat or wobbly off-kilter circle?.
( Credit goes to: Jim Vetrone, [e-mail] )

Measure the lux levels of the light sources.

Incandescent lamp = lux Daylight = lux

Fluorescent lamp = lux Torch light = lux

Projector lamp = lux

Measure the sound levels:

Silence = dB School canteen during long lunch break= dB

Classmate talking = dB Street sounds = dB

School primary school corridor = db

Дата добавления: 2015-11-16