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103 is the love. |
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Thursday, February 25, 2010 5:12 AM
♥ Group 5 - Time, Speed and Rate. Felicia,Hannah,Michelle, Caroline and Syakirah Measuring instruments for time are :
Step 1 - Press the reset button (10 o'clock) to reset your watch to 0. Depress the button quickly and completely several times to completely reset the movement to 0. Step 2 - Press the crown down firmly to start the stopwatch Step 3 - Press the crown down firmly to stop the stopwatch Step 4 - Repeat step 1 to ready the stopwatch for the next event   The smallest division on the mechanical stopwatch is 0.1 second. Hence, the mechanical stopwatch is accurate to 0.1 second. How to use a electronic stopwatch : Step 1 - Hold the stopwatch in one hand with your thumb on the top button. Step 2 - Press the button twice in rapid succession to clear the previous time. Step 3 - Press and release the button once to start timing. Step 4 - Let the watch run until you wish to stop it. Step 5 - Press the button one more time to stop the clock. Step 6 - Repeat as you wish.   The electronic stopwatch is more accurate than the mechanical stopwatch. It can measure time intervals accurate to 0.01 seconds. Unlike mechanical stopwatch, the electronic stopwatch can also record the time interval in hours. How to use a hourglass : Step 1 - Once all the sand has run to the botoom bulb, the device can be inverted in order to measure time again.   The hourglass, also known as a sandglass, sand timer, sand clock or egg timer, is a device for the measurement of time. It consists of two glass bulbs placed one above the other which are connected by a narrow tube. One of the bulbs is usually filled with fine sand which flows through the narrow tube into the bottom bulb at a given rate. Once all the sand has run to the bottom bulb, the device can be inverted in order to measure time again. Done by Felicia and Hannah :) Rate
Speed
Rate & speed by Michelle, (26). :D Caroline,(2) Time The s1 unit for speed is seconds People use instruments such as the, -stopwatches -mechanical stopwatches In the past people used their own ways of measuring time They used instruments such as the, -sundial -water clock -Hour glass  Sundial The sun dial measures time by the position of the Sun. During the day they saw that the shadow cast by a tree, a rock, or even their own body was long early in the morning and grew shorter and shorter until it disappeared when the sun was overhead in the middle of the day. They also would have noticed that the shadow grew longer again, on the other side of the tree, as night came. After awhile they were able to tell how much of the day was over by looking at the shadows  Water clock In the water clock the water flowed through a very small hole made in the center of the bottom, emerging on the outside under the figure of a seated baboon. To know the time, one had to look inside the basin to observe the water level and read the time according to the nearest false hole. Hour glass  Hour glass The hourglass is a device for the measurement of time. An hourglass is a non-mechanical instrument that is used to keep time. An hourglass usually measures the passing of an hour, though individual hourglasses can be designed to measure different units of time. Some hourglasses measure just a few seconds, while others measure minutes and some even measure days. *Pictures from google. Done by:Caroline Rachel Gudijanto ;D Class:103(2) Thanks for reading this !!! Hope you give us high marks =x |
Yours truly,  With Loves, Scream Love, |